:root {
  color-scheme: light;
  --page: #fff2f7;
  --panel: rgba(255, 226, 238, 0.82);
  --paper: rgba(255, 252, 254, 0.96);
  --ink: #452735;
  --muted: #8c6677;
  --line: rgba(174, 76, 116, 0.2);
  --accent: #c54f7e;
  --accent-strong: #9d315c;
  --accent-soft: #f6d6e3;
  --code: #fbedf3;
  --glow-a: rgba(255, 178, 211, 0.34);
  --glow-b: rgba(226, 133, 175, 0.2);
  --shadow: 0 18px 48px color-mix(in srgb, var(--accent-strong) 14%, transparent);
  --reader-size: 18px;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Segoe UI", sans-serif;
  --serif: "Iowan Old Style", "Songti TC", "Noto Serif TC", "PingFang TC", serif;
}

.reader-actions [data-user-hidden="true"] { display: none !important; }
.editor-insert-control[hidden], .editor-insert-menu[hidden], .appearance-menu[hidden], .language-hide-prompt[hidden], .editor-image-drop[hidden] { display: none !important; }
.editor-insert-button { width: 92px; border-color: color-mix(in srgb, var(--accent) 48%, var(--line)); }
.editor-insert-menu { width: min(372px, calc(100vw - 16px)); padding: 10px; }
.editor-insert-group { display: grid; gap: 7px; padding: 8px; }
.editor-insert-group + .editor-insert-group { border-top: 1px solid var(--line); }
.editor-insert-group > strong { color: var(--muted); font-size: 10px; font-weight: 750; letter-spacing: .04em; }
.editor-insert-group > div { display: flex; flex-wrap: wrap; gap: 6px; }
.editor-insert-group button { min-width: 40px; min-height: 32px; padding: 5px 9px; border: 1px solid var(--line); border-radius: 8px; background: color-mix(in srgb, var(--paper) 90%, var(--accent-soft)); color: var(--ink); font: 700 11px/1.2 var(--sans); cursor: pointer; }
.editor-insert-group button:is(:hover, :focus-visible) { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-strong); outline: none; }
.appearance-control { order: 99 !important; }
.appearance-button { display: inline-grid; place-items: center; width: 40px; min-width: 40px; padding: 0; }
.appearance-theme-icon { display: grid; place-items: center; width: 100%; height: 100%; font-size: 26px; line-height: 1; }
.appearance-menu { width: min(370px, calc(100vw - 16px)); max-height: min(690px, calc(100vh - 24px)); padding: 0; }
.appearance-menu-header { position: sticky; top: 0; z-index: 2; display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; padding: 15px; border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--paper) 96%, transparent); backdrop-filter: blur(18px); }
.appearance-menu-header > div { display: grid; gap: 3px; }
.appearance-menu-header strong { font-size: 13px; }
.appearance-menu-header span { color: var(--muted); font-size: 10px; line-height: 1.45; }
.appearance-menu-header button { width: 28px; height: 28px; border: 0; border-radius: 8px; background: var(--accent-soft); color: var(--accent-strong); font-size: 17px; cursor: pointer; }
.appearance-section { display: grid; gap: 9px; padding: 13px 15px; border-bottom: 1px solid var(--line); }
.appearance-section > strong { color: var(--muted); font-size: 10px; font-weight: 750; letter-spacing: .04em; }
.appearance-mode-switch { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; padding: 4px; border-radius: 10px; background: color-mix(in srgb, var(--code) 75%, var(--paper)); }
.appearance-mode-switch button { display: flex; align-items: center; justify-content: center; gap: 7px; min-height: 34px; border: 1px solid transparent; border-radius: 8px; background: transparent; color: var(--muted); font: 700 11px/1 var(--sans); cursor: pointer; }
.appearance-mode-switch button.active { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); background: var(--paper); color: var(--accent-strong); box-shadow: 0 4px 12px color-mix(in srgb, var(--accent-strong) 9%, transparent); }
.palette-options { display: grid; grid-template-columns: 1fr 1fr; gap: 5px; }
.palette-tile { display: grid; grid-template-columns: 48px minmax(0, 1fr) 14px; align-items: center; gap: 7px; min-width: 0; min-height: 36px; padding: 5px 6px; border: 1px solid transparent; border-radius: 9px; background: transparent; color: var(--ink); font: 650 10px/1.25 var(--sans); text-align: left; cursor: pointer; }
.palette-tile:is(:hover, :focus-visible), .palette-tile[aria-checked="true"] { border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); background: var(--accent-soft); color: var(--accent-strong); outline: none; }
.palette-tile > span:nth-child(2) { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.palette-tile .palette-swatch { width: 48px; }
.palette-tile .palette-swatch i { flex: 1 1 0; width: auto; height: 20px; }
.palette-tile b { color: var(--accent); text-align: center; }
.settings-language { width: 100%; min-height: 36px; padding: 0 10px; border: 1px solid var(--line); border-radius: 9px; outline: none; background: var(--paper); color: var(--ink); font: 650 11px/1 var(--sans); }
.toolbar-visibility-section label { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 31px; color: var(--ink); font-size: 11px; }
.toolbar-visibility-section input { width: 16px; height: 16px; accent-color: var(--accent-strong); }
.toolbar-reset { justify-self: start; min-height: 32px; margin-top: 2px; padding: 0 10px; border: 1px solid var(--line); border-radius: 8px; background: transparent; color: var(--accent-strong); font: 700 10px/1 var(--sans); cursor: pointer; }
.language-hide-prompt { position: fixed; z-index: 760; display: grid; gap: 11px; width: min(350px, calc(100vw - 20px)); padding: 14px; border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--line)); border-radius: 14px; background: color-mix(in srgb, var(--paper) 96%, transparent); color: var(--ink); box-shadow: 0 20px 54px color-mix(in srgb, var(--accent-strong) 22%, transparent); backdrop-filter: blur(20px); }
.language-hide-prompt > div:first-child { display: grid; gap: 4px; }
.language-hide-prompt strong { font-size: 12px; }
.language-hide-prompt span { color: var(--muted); font-size: 11px; line-height: 1.45; }
.language-hide-prompt > div:last-child { display: flex; justify-content: flex-end; gap: 7px; }
.language-hide-prompt button { min-height: 32px; padding: 0 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); color: var(--ink); font: 700 10px/1 var(--sans); cursor: pointer; }
.language-hide-prompt .primary-button { border-color: var(--accent-strong); background: var(--accent-strong); color: white; }
.editor-image-drop { position: absolute; inset: 28px; z-index: 8; display: grid; place-content: center; justify-items: center; gap: 10px; border: 2px dashed color-mix(in srgb, var(--accent) 70%, var(--line)); border-radius: 18px; background: color-mix(in srgb, var(--paper) 88%, transparent); color: var(--accent-strong); box-shadow: inset 0 0 0 5px color-mix(in srgb, var(--accent-soft) 60%, transparent); backdrop-filter: blur(7px); pointer-events: none; }
.editor-image-drop > span { font-size: 32px; }
.editor-image-drop strong { font-size: 14px; }
.source-editor::selection { background: color-mix(in srgb, var(--accent) 36%, transparent); color: var(--accent-strong); }
.discard-edit-dialog { width: min(430px, calc(100vw - 32px)); max-width: none; padding: 0; overflow: hidden; border: 1px solid color-mix(in srgb, #b74664 32%, var(--line)); border-radius: 18px; background: var(--paper); color: var(--ink); box-shadow: 0 28px 90px rgba(22, 14, 20, .3); }
.discard-edit-dialog::backdrop { background: rgba(25, 17, 23, .48); backdrop-filter: blur(5px); }
.discard-edit-dialog form { display: grid; gap: 20px; padding: 24px; }
.discard-edit-header { display: flex; align-items: flex-start; gap: 13px; }
.discard-edit-symbol { display: grid; flex: 0 0 40px; width: 40px; height: 40px; place-items: center; border: 1px solid color-mix(in srgb, #b74664 38%, var(--line)); border-radius: 12px; background: color-mix(in srgb, #b74664 13%, var(--paper)); color: #b74664; font-size: 18px; font-weight: 850; }
.discard-edit-header h2 { margin: 0; font-size: 19px; line-height: 1.3; }
.discard-edit-header p { margin: 6px 0 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
.discard-edit-actions { display: flex; justify-content: flex-end; gap: 8px; }
.discard-edit-actions .danger-button { border-color: #b74664; background: #b74664; color: #fff; }

:root.dark {
  color-scheme: dark;
  --page: #1d151a;
  --panel: rgba(49, 29, 39, 0.9);
  --paper: rgba(45, 30, 38, 0.97);
  --ink: #f5e8ee;
  --muted: #c2a2b0;
  --line: rgba(238, 157, 189, 0.18);
  --accent: #ee9dbd;
  --accent-strong: #ffc0d7;
  --accent-soft: #583245;
  --code: #251a20;
  --glow-a: rgba(163, 67, 108, 0.2);
  --glow-b: rgba(104, 57, 91, 0.18);
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.3);
}

body.booting { overflow: hidden; }
.boot-loader {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at 18% 18%, var(--glow-a), transparent 34%),
    radial-gradient(circle at 82% 78%, var(--glow-b), transparent 38%),
    var(--page);
  color: var(--ink);
  transition: opacity .32s ease, visibility .32s ease;
}
body:not(.booting) .boot-loader { visibility: hidden; opacity: 0; pointer-events: none; }
.boot-loader-card {
  width: min(480px, calc(100vw - 40px));
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr);
  gap: 7px 18px;
  align-items: center;
  padding: clamp(25px, 5vw, 38px);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--line));
  border-radius: 26px;
  background: color-mix(in srgb, var(--paper) 93%, transparent);
  box-shadow: 0 28px 90px color-mix(in srgb, var(--accent-strong) 20%, transparent);
  backdrop-filter: blur(18px) saturate(1.08);
}
.boot-loader-mark {
  position: relative;
  grid-row: 1;
  width: 66px;
  height: 66px;
  display: grid;
  place-items: center;
}
.boot-loader-mark img { position: relative; z-index: 1; width: 44px; height: 44px; border-radius: 13px; box-shadow: 0 9px 25px color-mix(in srgb, var(--accent-strong) 24%, transparent); }
.boot-loader-orbit {
  position: absolute;
  inset: 0;
  border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  border-top-color: var(--accent);
  border-right-color: color-mix(in srgb, var(--accent-strong) 72%, transparent);
  border-radius: 50%;
  animation: boot-orbit 1.05s linear infinite;
}
.boot-loader-kicker { margin: 0 0 5px; color: var(--accent-strong); font-size: 10px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.boot-loader-card h1 { margin: 0; font-family: var(--serif); font-size: clamp(1.25rem, 4vw, 1.65rem); line-height: 1.18; }
.boot-loader-copy { margin: 8px 0 0; color: var(--muted); font-size: 12px; }
.boot-loader-progress {
  grid-column: 1 / -1;
  height: 3px;
  margin-top: 17px;
  overflow: hidden;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}
.boot-loader-progress i {
  display: block;
  width: 34%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  box-shadow: 0 0 16px color-mix(in srgb, var(--accent) 55%, transparent);
  animation: boot-progress 1.2s ease-in-out infinite;
}
@keyframes boot-orbit { to { transform: rotate(360deg); } }
@keyframes boot-progress { from { transform: translateX(-110%); } to { transform: translateX(300%); } }
@media (max-width: 520px) {
  .boot-loader-card { grid-template-columns: 54px minmax(0, 1fr); gap: 5px 14px; border-radius: 22px; }
  .boot-loader-mark { width: 54px; height: 54px; }
  .boot-loader-mark img { width: 36px; height: 36px; border-radius: 11px; }
}
@media (prefers-reduced-motion: reduce) {
  .boot-loader-orbit { animation-duration: 2.4s; }
  .boot-loader-progress i { animation-duration: 2.2s; }
}

/* v1.1.0 compact authoring/settings controls override the legacy dropdown size. */
.reader-actions .appearance-control { order: 99 !important; }
.palette-menu.appearance-menu { width: min(370px, calc(100vw - 16px)); max-height: min(690px, calc(100vh - 24px)); padding: 0; }
.toolbar-menu.editor-insert-menu { width: min(372px, calc(100vw - 16px)); padding: 10px; }

:root[data-palette="lavender-mist"] { --page:#f7f2ff; --panel:rgba(237,228,252,.86); --paper:rgba(253,250,255,.97); --ink:#382d4a; --muted:#786a8e; --line:rgba(112,82,158,.22); --accent:#8f69c4; --accent-strong:#68479b; --accent-soft:#e8dcf8; --code:#f0e9fa; --glow-a:rgba(196,169,245,.32); --glow-b:rgba(154,129,210,.18); }
:root.dark[data-palette="lavender-mist"] { --page:#181521; --panel:rgba(40,33,55,.92); --paper:rgba(35,29,48,.98); --ink:#f0eafa; --muted:#b8a9cf; --line:rgba(192,165,229,.2); --accent:#b99ae6; --accent-strong:#dac5ff; --accent-soft:#493861; --code:#211b2c; --glow-a:rgba(130,91,185,.22); --glow-b:rgba(86,65,131,.2); }

:root[data-palette="sakura-milk"] { --page:#fff5f7; --panel:rgba(255,231,237,.88); --paper:rgba(255,253,253,.97); --ink:#4a2e37; --muted:#8e6874; --line:rgba(190,93,119,.2); --accent:#d86f8b; --accent-strong:#ad4967; --accent-soft:#f8dce4; --code:#fceef2; --glow-a:rgba(255,188,207,.34); --glow-b:rgba(241,154,181,.18); }
:root.dark[data-palette="sakura-milk"] { --page:#21171a; --panel:rgba(57,35,42,.92); --paper:rgba(48,31,37,.98); --ink:#fae9ee; --muted:#c9a6b0; --line:rgba(240,158,181,.2); --accent:#ee9bb2; --accent-strong:#ffc4d4; --accent-soft:#623747; --code:#291d21; --glow-a:rgba(188,77,108,.22); --glow-b:rgba(116,58,76,.2); }

:root[data-palette="peach-dawn"] { --page:#fff5ef; --panel:rgba(255,229,216,.87); --paper:rgba(255,252,249,.97); --ink:#4b3028; --muted:#8d6a5d; --line:rgba(188,103,73,.2); --accent:#d9785c; --accent-strong:#a94f36; --accent-soft:#f8ddcf; --code:#fbece4; --glow-a:rgba(255,186,153,.33); --glow-b:rgba(231,139,106,.18); }
:root.dark[data-palette="peach-dawn"] { --page:#211815; --panel:rgba(58,39,32,.92); --paper:rgba(49,33,28,.98); --ink:#f8ebe5; --muted:#c7a99d; --line:rgba(236,156,126,.2); --accent:#e99a7e; --accent-strong:#ffc0a7; --accent-soft:#623e31; --code:#2a1f1a; --glow-a:rgba(180,87,55,.22); --glow-b:rgba(117,65,46,.2); }

:root[data-palette="apricot-cream"] { --page:#fff8ef; --panel:rgba(251,235,212,.88); --paper:rgba(255,253,248,.97); --ink:#493527; --muted:#886f5b; --line:rgba(178,120,66,.2); --accent:#c98449; --accent-strong:#98602e; --accent-soft:#f4e1c8; --code:#f8eee0; --glow-a:rgba(247,194,126,.3); --glow-b:rgba(213,155,92,.18); }
:root.dark[data-palette="apricot-cream"] { --page:#201a14; --panel:rgba(55,43,31,.92); --paper:rgba(47,36,27,.98); --ink:#f4ecdf; --muted:#c2ad93; --line:rgba(224,177,116,.2); --accent:#dda76d; --accent-strong:#f4cb99; --accent-soft:#5d472f; --code:#282018; --glow-a:rgba(158,105,51,.22); --glow-b:rgba(111,79,44,.2); }

:root[data-palette="honey-tea"] { --page:#fff9e9; --panel:rgba(250,235,191,.87); --paper:rgba(255,254,247,.97); --ink:#443822; --muted:#837252; --line:rgba(169,127,48,.21); --accent:#b9842f; --accent-strong:#88601e; --accent-soft:#f2e2b7; --code:#f8efd4; --glow-a:rgba(247,207,107,.3); --glow-b:rgba(202,159,62,.18); }
:root.dark[data-palette="honey-tea"] { --page:#1e1a12; --panel:rgba(52,44,27,.92); --paper:rgba(44,37,24,.98); --ink:#f2ead7; --muted:#bdae8b; --line:rgba(218,181,104,.2); --accent:#d2aa59; --accent-strong:#efd083; --accent-soft:#584722; --code:#272116; --glow-a:rgba(145,109,37,.22); --glow-b:rgba(100,79,33,.2); }

:root[data-palette="matcha-cloud"] { --page:#f5f8ef; --panel:rgba(229,237,211,.88); --paper:rgba(252,253,248,.97); --ink:#34402d; --muted:#6e7d63; --line:rgba(112,141,80,.21); --accent:#779451; --accent-strong:#526f35; --accent-soft:#dfe9cf; --code:#edf2e4; --glow-a:rgba(185,211,142,.3); --glow-b:rgba(132,167,88,.17); }
:root.dark[data-palette="matcha-cloud"] { --page:#171d15; --panel:rgba(36,48,31,.92); --paper:rgba(31,41,27,.98); --ink:#e8f0df; --muted:#a5b69a; --line:rgba(162,190,131,.2); --accent:#9fbd7c; --accent-strong:#c7dda8; --accent-soft:#3d512f; --code:#1c2519; --glow-a:rgba(90,127,55,.22); --glow-b:rgba(62,91,43,.2); }

:root[data-palette="mint-glass"] { --page:#effaf7; --panel:rgba(215,241,233,.86); --paper:rgba(250,255,253,.97); --ink:#26443b; --muted:#5f8176; --line:rgba(57,145,119,.2); --accent:#3d9b83; --accent-strong:#27725e; --accent-soft:#d2eee6; --code:#e5f5f0; --glow-a:rgba(131,220,195,.3); --glow-b:rgba(75,173,148,.17); }
:root.dark[data-palette="mint-glass"] { --page:#121e1b; --panel:rgba(27,50,43,.92); --paper:rgba(23,43,37,.98); --ink:#def2ec; --muted:#96bbb0; --line:rgba(115,204,180,.2); --accent:#79cbb5; --accent-strong:#a5ead7; --accent-soft:#285a4c; --code:#172823; --glow-a:rgba(43,138,112,.22); --glow-b:rgba(31,92,77,.2); }

:root[data-palette="seafoam-pearl"] { --page:#effafa; --panel:rgba(214,239,239,.87); --paper:rgba(250,255,255,.97); --ink:#274344; --muted:#628082; --line:rgba(61,143,145,.2); --accent:#3d9495; --accent-strong:#286c6f; --accent-soft:#d4eded; --code:#e5f3f3; --glow-a:rgba(128,213,211,.29); --glow-b:rgba(73,167,171,.17); }
:root.dark[data-palette="seafoam-pearl"] { --page:#121d1e; --panel:rgba(27,48,49,.92); --paper:rgba(23,41,42,.98); --ink:#dff0f0; --muted:#99b8ba; --line:rgba(115,198,200,.2); --accent:#78c4c5; --accent-strong:#a6e3e3; --accent-soft:#2a5556; --code:#172627; --glow-a:rgba(39,127,130,.22); --glow-b:rgba(29,87,90,.2); }

:root[data-palette="sky-ribbon"] { --page:#eff8ff; --panel:rgba(218,237,252,.88); --paper:rgba(251,254,255,.97); --ink:#293e50; --muted:#647d91; --line:rgba(67,135,184,.2); --accent:#4c90c8; --accent-strong:#326b9b; --accent-soft:#d7eafa; --code:#e7f2fb; --glow-a:rgba(138,201,246,.3); --glow-b:rgba(86,155,207,.17); }
:root.dark[data-palette="sky-ribbon"] { --page:#121a21; --panel:rgba(28,44,57,.92); --paper:rgba(23,37,48,.98); --ink:#e2eff8; --muted:#9db7ca; --line:rgba(116,180,225,.2); --accent:#79b6e1; --accent-strong:#a9d7f5; --accent-soft:#294d68; --code:#18232d; --glow-a:rgba(47,121,172,.22); --glow-b:rgba(31,82,119,.2); }

:root[data-palette="moonlight-blue"] { --page:#f1f5ff; --panel:rgba(221,230,250,.88); --paper:rgba(252,253,255,.97); --ink:#2d3852; --muted:#687695; --line:rgba(74,105,174,.2); --accent:#5b78ba; --accent-strong:#405997; --accent-soft:#dce5f8; --code:#e9eef9; --glow-a:rgba(145,169,231,.3); --glow-b:rgba(91,119,190,.17); }
:root.dark[data-palette="moonlight-blue"] { --page:#131720; --panel:rgba(30,38,57,.92); --paper:rgba(25,32,48,.98); --ink:#e6ebf8; --muted:#a2aec9; --line:rgba(126,150,207,.2); --accent:#86a0db; --accent-strong:#b5c7f1; --accent-soft:#30436c; --code:#1a202b; --glow-a:rgba(58,84,151,.22); --glow-b:rgba(39,58,105,.2); }

:root[data-palette="iris-violet"] { --page:#f6f1ff; --panel:rgba(231,220,250,.87); --paper:rgba(253,251,255,.97); --ink:#3b2e4e; --muted:#79688e; --line:rgba(113,78,164,.21); --accent:#805db4; --accent-strong:#5d3d8c; --accent-soft:#e7daf7; --code:#f0e8fa; --glow-a:rgba(186,155,235,.31); --glow-b:rgba(133,96,190,.18); }
:root.dark[data-palette="iris-violet"] { --page:#191421; --panel:rgba(42,32,56,.92); --paper:rgba(36,27,48,.98); --ink:#f0e8f8; --muted:#b8a7cb; --line:rgba(189,157,224,.2); --accent:#b393dd; --accent-strong:#d9c0f7; --accent-soft:#4c3564; --code:#221a2b; --glow-a:rgba(119,76,167,.22); --glow-b:rgba(81,53,114,.2); }

:root[data-palette="blueberry-milk"] { --page:#f3f4ff; --panel:rgba(225,227,249,.88); --paper:rgba(253,253,255,.97); --ink:#333750; --muted:#707793; --line:rgba(87,98,171,.2); --accent:#6874be; --accent-strong:#4a5598; --accent-soft:#dfe2f8; --code:#ebedf9; --glow-a:rgba(158,166,230,.3); --glow-b:rgba(102,114,190,.17); }
:root.dark[data-palette="blueberry-milk"] { --page:#151621; --panel:rgba(34,36,57,.92); --paper:rgba(29,31,49,.98); --ink:#e9eafa; --muted:#a9acc9; --line:rgba(142,150,211,.2); --accent:#929dde; --accent-strong:#c0c6f4; --accent-soft:#39416c; --code:#1d1f2d; --glow-a:rgba(71,81,158,.22); --glow-b:rgba(49,56,111,.2); }

:root[data-palette="grape-velvet"] { --page:#faf1fb; --panel:rgba(240,220,241,.88); --paper:rgba(255,251,255,.97); --ink:#452e48; --muted:#866a88; --line:rgba(144,78,148,.2); --accent:#9b5da0; --accent-strong:#733d78; --accent-soft:#efdaef; --code:#f5e8f5; --glow-a:rgba(218,158,218,.3); --glow-b:rgba(165,94,169,.17); }
:root.dark[data-palette="grape-velvet"] { --page:#1e141f; --panel:rgba(51,31,53,.92); --paper:rgba(43,27,45,.98); --ink:#f4e7f4; --muted:#c2a4c2; --line:rgba(213,143,214,.2); --accent:#c78ec9; --accent-strong:#eab7e9; --accent-soft:#5b3460; --code:#281b29; --glow-a:rgba(151,67,154,.22); --glow-b:rgba(99,46,103,.2); }

:root[data-palette="rosewood"] { --page:#fff3f4; --panel:rgba(245,222,225,.88); --paper:rgba(255,252,252,.97); --ink:#492f33; --muted:#886a6f; --line:rgba(157,77,89,.21); --accent:#aa5c69; --accent-strong:#7e3e48; --accent-soft:#f0d9dd; --code:#f7e9eb; --glow-a:rgba(224,155,166,.3); --glow-b:rgba(173,91,105,.17); }
:root.dark[data-palette="rosewood"] { --page:#1f1517; --panel:rgba(53,33,37,.92); --paper:rgba(45,28,32,.98); --ink:#f4e8ea; --muted:#c2a5aa; --line:rgba(218,146,157,.2); --accent:#ca8b95; --accent-strong:#edb5bd; --accent-soft:#5c343b; --code:#291c1e; --glow-a:rgba(146,62,75,.22); --glow-b:rgba(99,44,53,.2); }

:root[data-palette="cocoa-berry"] { --page:#fbf5f1; --panel:rgba(239,226,218,.88); --paper:rgba(255,253,251,.97); --ink:#45352f; --muted:#806f68; --line:rgba(143,99,78,.21); --accent:#9b6a55; --accent-strong:#714837; --accent-soft:#eadbd3; --code:#f2e9e4; --glow-a:rgba(207,169,149,.3); --glow-b:rgba(157,106,84,.17); }
:root.dark[data-palette="cocoa-berry"] { --page:#1d1816; --panel:rgba(49,39,35,.92); --paper:rgba(42,33,30,.98); --ink:#efe8e4; --muted:#b8a7a0; --line:rgba(198,157,137,.2); --accent:#bd8d78; --accent-strong:#dfb4a1; --accent-soft:#513b33; --code:#26201d; --glow-a:rgba(124,78,59,.22); --glow-b:rgba(85,57,45,.2); }

:root[data-palette="champagne-gold"] { --page:#fffaf0; --panel:rgba(244,234,207,.88); --paper:rgba(255,254,249,.97); --ink:#413a2b; --muted:#7c735e; --line:rgba(149,125,66,.21); --accent:#a88745; --accent-strong:#7b622d; --accent-soft:#eee3c8; --code:#f5eedc; --glow-a:rgba(226,202,141,.3); --glow-b:rgba(170,139,73,.17); }
:root.dark[data-palette="champagne-gold"] { --page:#1c1a14; --panel:rgba(47,43,31,.92); --paper:rgba(40,36,26,.98); --ink:#eeeadd; --muted:#b6ad96; --line:rgba(202,180,126,.2); --accent:#c3a867; --accent-strong:#e2cb91; --accent-soft:#504527; --code:#242118; --glow-a:rgba(128,101,42,.22); --glow-b:rgba(89,72,34,.2); }

:root[data-palette="silver-lilac"] { --page:#f7f6fa; --panel:rgba(232,230,238,.88); --paper:rgba(254,253,255,.97); --ink:#3d3948; --muted:#777182; --line:rgba(110,101,132,.2); --accent:#817893; --accent-strong:#5e566f; --accent-soft:#e5e1eb; --code:#efedf3; --glow-a:rgba(194,186,210,.3); --glow-b:rgba(136,125,157,.17); }
:root.dark[data-palette="silver-lilac"] { --page:#18171b; --panel:rgba(39,37,45,.92); --paper:rgba(33,32,39,.98); --ink:#ece9f0; --muted:#aea8b8; --line:rgba(171,161,188,.2); --accent:#aaa1ba; --accent-strong:#d0c8dc; --accent-soft:#464050; --code:#201f25; --glow-a:rgba(95,83,116,.22); --glow-b:rgba(66,59,79,.2); }

:root[data-palette="aurora-teal"] { --page:#eff9f8; --panel:rgba(213,238,234,.87); --paper:rgba(250,255,254,.97); --ink:#233f3e; --muted:#5c7d7b; --line:rgba(42,133,131,.21); --accent:#2d8d8b; --accent-strong:#1c6867; --accent-soft:#d0ece9; --code:#e3f3f1; --glow-a:rgba(110,211,202,.3); --glow-b:rgba(48,157,157,.17); }
:root.dark[data-palette="aurora-teal"] { --page:#101d1d; --panel:rgba(24,48,47,.92); --paper:rgba(20,41,40,.98); --ink:#dcf0ee; --muted:#91b8b5; --line:rgba(93,195,188,.2); --accent:#67c4be; --accent-strong:#92e3dc; --accent-soft:#245754; --code:#152727; --glow-a:rgba(27,130,126,.22); --glow-b:rgba(21,88,87,.2); }

:root[data-palette="ink-paper"] { --page:#f5f5f2; --panel:rgba(229,231,231,.9); --paper:rgba(253,253,250,.98); --ink:#2e3539; --muted:#687177; --line:rgba(76,91,100,.2); --accent:#536b78; --accent-strong:#394f5b; --accent-soft:#dce3e5; --code:#e9edee; --glow-a:rgba(173,190,197,.28); --glow-b:rgba(105,128,139,.16); }
:root.dark[data-palette="ink-paper"] { --page:#141718; --panel:rgba(31,36,38,.94); --paper:rgba(27,31,33,.98); --ink:#e7ebec; --muted:#a4adb1; --line:rgba(145,160,168,.2); --accent:#93a9b4; --accent-strong:#bdd0d8; --accent-soft:#38464d; --code:#1c2123; --glow-a:rgba(71,94,105,.22); --glow-b:rgba(48,65,73,.2); }

:root[data-palette="studio-white"] { --page:#f4f5f7; --panel:rgba(255,255,255,.94); --paper:rgba(255,255,255,.99); --ink:#20242a; --muted:#68707b; --line:rgba(39,47,57,.16); --accent:#52606f; --accent-strong:#2f3945; --accent-soft:#e7eaf0; --code:#f1f3f5; --glow-a:rgba(195,202,212,.22); --glow-b:rgba(153,163,176,.14); }
:root.dark[data-palette="studio-white"] { --page:#17191c; --panel:rgba(37,40,45,.95); --paper:rgba(30,32,36,.99); --ink:#f4f5f7; --muted:#b5bac2; --line:rgba(223,227,233,.16); --accent:#b6bec9; --accent-strong:#eef0f3; --accent-soft:#454a52; --code:#292c31; --glow-a:rgba(124,133,145,.16); --glow-b:rgba(82,89,98,.16); }

:root[data-palette="graphite"] { --page:#eceff2; --panel:rgba(218,223,229,.94); --paper:rgba(255,255,255,.99); --ink:#1f242b; --muted:#606975; --line:rgba(35,43,53,.2); --accent:#4b5563; --accent-strong:#252c35; --accent-soft:#d2d7de; --code:#eef0f3; --glow-a:rgba(137,147,159,.22); --glow-b:rgba(79,88,100,.14); }
:root.dark[data-palette="graphite"] { --page:#101215; --panel:rgba(28,31,36,.96); --paper:rgba(25,27,31,.99); --ink:#f2f3f5; --muted:#abb0b8; --line:rgba(226,229,234,.15); --accent:#9da5b0; --accent-strong:#e4e7eb; --accent-soft:#393e45; --code:#23262b; --glow-a:rgba(91,99,110,.17); --glow-b:rgba(52,58,66,.18); }

/* Palettes frame the document; the reading paper stays neutral and legible. */
:root {
  --reader-paper: rgba(255, 255, 255, .985);
  --reader-ink: #302b30;
  --reader-muted: #716b72;
  --reader-line: rgba(55, 48, 55, .13);
  --reader-code: #f5f4f6;
}

:root.dark {
  --reader-paper: rgba(30, 31, 35, .99);
  --reader-ink: #f1f2f4;
  --reader-muted: #afb1b7;
  --reader-line: rgba(238, 240, 244, .13);
  --reader-code: #292b31;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 9% 7%, var(--glow-a), transparent 30rem),
    radial-gradient(circle at 92% 94%, var(--glow-b), transparent 34rem),
    var(--page);
  color: var(--ink);
  font-family: var(--sans);
}

button, input, select { font: inherit; }

.app {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 320px;
  display: flex;
  flex-direction: column;
  padding: 18px 14px;
  background: var(--panel);
  border-right: 1px solid var(--line);
  z-index: 10;
  backdrop-filter: blur(22px) saturate(1.12);
}

.sidebar-tools {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding-bottom: 14px;
}

.sidebar-tools input {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 11px;
  background: var(--paper);
  color: var(--ink);
  outline: none;
}

.sidebar-tools input:focus { border-color: var(--accent); }

.icon-button {
  display: inline-grid;
  place-items: center;
  min-width: 38px;
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  box-shadow: 0 5px 14px color-mix(in srgb, var(--accent-strong) 8%, transparent);
  transition: transform 0.16s ease, border-color 0.16s ease, color 0.16s ease, background 0.16s ease;
}

.icon-button:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.icon-button.active { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-strong); }
.text-button { font-size: 13px; font-weight: 700; }

.file-tree {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 2px 2px 30px;
}

.folder { margin: 2px 0; }

.folder > summary {
  padding: 7px 8px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
  cursor: pointer;
  user-select: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.folder > summary:hover { background: color-mix(in srgb, var(--paper) 64%, transparent); }

.folder-contents {
  margin-left: 8px;
  padding-left: 7px;
  border-left: 1px solid var(--line);
}

.file-button {
  display: block;
  width: 100%;
  margin: 2px 0;
  padding: 7px 9px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  font-size: 13px;
  line-height: 1.35;
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-button:hover { background: color-mix(in srgb, var(--paper) 72%, transparent); }
.file-button.active { background: linear-gradient(110deg, var(--accent-soft), color-mix(in srgb, var(--paper) 72%, var(--accent-soft))); color: var(--accent-strong); font-weight: 700; }
.file-row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 26px;
  align-items: center;
  gap: 2px;
}
.file-row .file-button { min-width: 0; }
.file-remove-button {
  display: grid;
  width: 24px;
  height: 24px;
  padding: 0;
  place-items: center;
  border: 1px solid transparent;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  font-size: 16px;
  line-height: 1;
  opacity: 0;
  cursor: pointer;
  transition: opacity .15s ease, color .15s ease, border-color .15s ease, background .15s ease;
}
.file-row:hover .file-remove-button,
.file-row.active .file-remove-button,
.file-remove-button:focus-visible { opacity: 1; }
.file-remove-button:hover { border-color: color-mix(in srgb, #bd3d60 36%, var(--line)); background: color-mix(in srgb, #bd3d60 10%, var(--paper)); color: #ad3155; }
.file-remove-button:focus-visible { outline: 2px solid var(--accent-strong); outline-offset: 1px; }

.reader-shell {
  grid-column: 2;
  min-width: 0;
  position: relative;
}

.reader-bar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 72px;
  padding: 12px 24px;
  background: color-mix(in srgb, var(--page) 82%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.file-heading { flex: 1; min-width: 0; }

.file-heading h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-heading p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 11px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.reader-actions { display: flex; align-items: center; justify-content: flex-end; gap: 7px; }

.palette-picker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 0 8px 0 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
  color: var(--accent-strong);
  box-shadow: 0 5px 14px color-mix(in srgb, var(--accent-strong) 8%, transparent);
}

.palette-picker:focus-within { border-color: var(--accent); }

.palette-picker select {
  width: 116px;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

.mode-switch {
  display: flex;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  box-shadow: 0 5px 14px rgba(154, 57, 95, 0.06);
}

.mode-button {
  min-height: 30px;
  padding: 4px 11px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.mode-button:hover { color: var(--accent); }
.mode-button.active { background: linear-gradient(125deg, var(--accent), var(--accent-strong)); color: white; box-shadow: 0 5px 14px color-mix(in srgb, var(--accent-strong) 26%, transparent); }

.reading-mode-control {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 5px 14px color-mix(in srgb, var(--accent-strong) 8%, transparent);
  cursor: pointer;
}
.reading-mode-control:hover,
.reading-mode-control:focus-within { border-color: var(--accent); }
.reading-mode-control select {
  width: 76px;
  min-width: 0;
  border: 0;
  outline: 0;
  appearance: none;
  background: transparent;
  color: var(--ink);
  font: 750 11px/1 var(--sans);
  cursor: pointer;
}
.reading-mode-icon { color: var(--accent-strong); font-size: 13px; }
.reading-mode-chevron { margin-left: -5px; color: var(--muted); font-size: 11px; pointer-events: none; }
.reading-mode-control[hidden] { display: none; }

.progress-track {
  position: fixed;
  top: 71px;
  left: 320px;
  right: 0;
  height: 2px;
  z-index: 8;
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent);
}

.content {
  --paper: var(--reader-paper);
  --ink: var(--reader-ink);
  --muted: var(--reader-muted);
  --line: var(--reader-line);
  --code: var(--reader-code);
  width: min(820px, calc(100% - 48px));
  min-height: calc(100vh - 108px);
  margin: 26px auto 64px;
  padding: clamp(32px, 6vw, 72px) clamp(28px, 7vw, 76px);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.reader-shell[data-mode="horizontal"],
.reader-shell[data-mode="paged"] {
  height: 100vh;
  overflow: hidden;
}

.reader-shell[data-mode="horizontal"] .reader-bar,
.reader-shell[data-mode="paged"] .reader-bar {
  position: relative;
}

.reader-shell[data-mode="horizontal"] .content,
.reader-shell[data-mode="paged"] .content {
  width: calc(100% - 28px);
  max-width: none;
  height: calc(100vh - 101px);
  min-height: 0;
  margin: 14px auto 15px;
  overflow-x: auto;
  overflow-y: hidden;
  column-fill: auto;
  scrollbar-width: none;
  overscroll-behavior: contain;
  touch-action: pan-x;
  line-height: 1.82;
}

.reader-shell[data-mode="horizontal"] .content::-webkit-scrollbar,
.reader-shell[data-mode="paged"] .content::-webkit-scrollbar { display: none; }

.reader-shell[data-mode="horizontal"] .content {
  padding: 38px 46px;
  column-width: min(36rem, 43vw);
  column-gap: 4rem;
}

.reader-shell[data-mode="paged"] .content {
  --page-pad: clamp(36px, 7vw, 88px);
  padding: 38px var(--page-pad) 46px;
  column-count: 1;
  column-gap: clamp(72px, 14vw, 176px);
}

.reader-shell[data-mode="horizontal"] .prose h1,
.reader-shell[data-mode="horizontal"] .prose h2,
.reader-shell[data-mode="horizontal"] .prose h3,
.reader-shell[data-mode="horizontal"] .prose blockquote,
.reader-shell[data-mode="horizontal"] .prose pre,
.reader-shell[data-mode="horizontal"] .prose table,
.reader-shell[data-mode="paged"] .prose h1,
.reader-shell[data-mode="paged"] .prose h2,
.reader-shell[data-mode="paged"] .prose h3,
.reader-shell[data-mode="paged"] .prose blockquote,
.reader-shell[data-mode="paged"] .prose pre,
.reader-shell[data-mode="paged"] .prose table {
  break-inside: avoid;
}

.paged-navigation {
  position: fixed;
  right: 24px;
  bottom: 18px;
  z-index: 7;
  display: inline-grid;
  grid-template-columns: 36px minmax(62px, auto) 36px;
  align-items: center;
  gap: 3px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  color: var(--muted);
  box-shadow: 0 8px 22px color-mix(in srgb, var(--accent-strong) 14%, transparent);
  backdrop-filter: blur(12px);
}
.paged-navigation[hidden] { display: none; }
.page-number {
  display: block;
  padding: 0 7px;
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  text-align: center;
  white-space: nowrap;
}
.page-turn-button {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0 0 2px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--accent-strong);
  font: 700 25px/1 var(--sans);
  cursor: pointer;
  touch-action: manipulation;
}
.page-turn-button:hover:not(:disabled),
.page-turn-button:focus-visible {
  background: var(--accent-soft);
  color: var(--accent-strong);
  outline: none;
}
.page-turn-button:focus-visible { box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--accent) 28%, transparent); }
.page-turn-button:active:not(:disabled) { transform: scale(.94); }
.page-turn-button:disabled { color: color-mix(in srgb, var(--muted) 36%, transparent); cursor: default; }

.empty { color: var(--muted); text-align: center; margin-top: 30vh; }
.error { color: #b54545; }
.content.library-prompt-active { cursor: pointer; }
.root-folder-prompt {
  width: 100%;
  min-height: calc(100vh - 250px);
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 10px;
  padding: clamp(24px, 6vw, 70px);
  border: 1px dashed color-mix(in srgb, var(--accent) 42%, var(--line));
  border-radius: 16px;
  background: linear-gradient(145deg, color-mix(in srgb, var(--accent-soft) 38%, transparent), transparent 62%);
  color: var(--ink);
  text-align: center;
  cursor: pointer;
  transition: border-color .18s ease, background .18s ease, transform .18s ease, box-shadow .18s ease;
}
.root-folder-prompt:hover,
.root-folder-prompt:focus-visible {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent-soft) 52%, transparent);
  box-shadow: 0 18px 42px color-mix(in srgb, var(--accent-strong) 14%, transparent);
  transform: translateY(-2px);
  outline: none;
}
.root-folder-prompt-icon {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  border-radius: 17px;
  background: linear-gradient(145deg, var(--accent), var(--accent-strong));
  color: white;
  box-shadow: 0 10px 24px color-mix(in srgb, var(--accent-strong) 26%, transparent);
  font: 700 22px var(--sans);
}
.root-folder-prompt strong { max-width: 31rem; font: 700 clamp(19px, 2.4vw, 28px)/1.3 var(--sans); }
.root-folder-prompt > span:last-child { max-width: 31rem; color: var(--muted); font: 500 13px/1.65 var(--sans); }
.reader-shell[data-mode="horizontal"] .content.library-prompt-active,
.reader-shell[data-mode="paged"] .content.library-prompt-active { columns: auto; display: grid; overflow: auto; }
.reader-shell[data-mode="horizontal"] .root-folder-prompt,
.reader-shell[data-mode="paged"] .root-folder-prompt { min-height: 100%; }

.prose {
  font-family: var(--serif);
  font-size: var(--reader-size);
  line-height: 1.95;
  letter-spacing: 0.015em;
  overflow-wrap: anywhere;
}

.prose h1, .prose h2, .prose h3, .prose h4, .prose h5, .prose h6 {
  color: var(--ink);
  line-height: 1.45;
  scroll-margin-top: 92px;
}

.prose h1 { margin: 0 0 1.5em; font-size: 2em; letter-spacing: 0.04em; }
.prose h2 { margin: 2.4em 0 1em; padding-bottom: 0.35em; border-bottom: 1px solid var(--line); font-size: 1.48em; }
.prose h3 { margin: 2em 0 0.8em; font-size: 1.2em; color: var(--accent-strong); }
.prose h4 { margin: 1.7em 0 0.7em; font-size: 1.05em; }
.prose p { margin: 0 0 1.15em; }
.prose strong { font-family: var(--sans); font-weight: 800; }
.prose em { color: var(--muted); }
.prose a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.prose hr { margin: 2.7em 0; border: 0; border-top: 1px solid var(--line); }

.prose blockquote {
  margin: 1.5em 0;
  padding: 0.2em 1.1em;
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--accent-soft) 50%, transparent);
  color: var(--muted);
}

.prose blockquote p:last-child { margin-bottom: 0; }
.prose ul, .prose ol { margin: 1em 0 1.4em; padding-left: 1.5em; }
.prose li { margin: 0.35em 0; padding-left: 0.2em; }
.prose code { padding: 0.14em 0.35em; border-radius: 4px; background: var(--code); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.86em; }
.prose pre { overflow: auto; margin: 1.5em 0; padding: 18px; border-radius: 8px; background: var(--code); line-height: 1.6; }
.prose pre code { padding: 0; background: transparent; }
.prose img { display: block; max-width: 100%; height: auto; margin: 1.6em auto; border-radius: 6px; }
.prose img.document-image {
  width: auto;
  max-width: min(100%, var(--image-natural-width, 100%));
  max-height: min(76vh, 900px);
  object-fit: contain;
  cursor: zoom-in;
  background: color-mix(in srgb, var(--code) 64%, transparent);
  box-shadow: 0 10px 28px color-mix(in srgb, var(--ink) 10%, transparent);
}
.prose img.document-image.image-long { max-height: none; }
.prose img.document-image:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 62%, transparent); outline-offset: 4px; }
.prose img.document-image.image-error { min-width: 180px; min-height: 72px; box-shadow: none; }
.image-error-note { display: block; margin: -1em auto 1.6em; color: var(--muted); text-align: center; overflow-wrap: anywhere; }
.table-wrap { margin: 1.5em 0; overflow-x: auto; }
.prose table { width: 100%; border-collapse: collapse; font-family: var(--sans); font-size: 0.86em; line-height: 1.55; }
.prose th, .prose td { padding: 9px 11px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.prose th { background: var(--code); }

.mobile-only { display: none; }

@media (max-width: 820px) {
  .app { display: block; }
  .sidebar { transform: translateX(-102%); transition: transform 0.2s ease; box-shadow: var(--shadow); }
  .sidebar.open { transform: translateX(0); }
  .reader-shell { grid-column: auto; }
  .reader-bar { min-height: 116px; padding: 10px 12px; flex-wrap: wrap; align-content: center; }
  .mobile-only { display: inline-grid; }
  .progress-track { left: 0; top: 115px; }
  .content { width: calc(100% - 20px); margin: 10px auto 32px; padding: 28px 20px 48px; border-radius: 2px; }
  .reader-actions { flex: 1 1 100%; min-width: 0; gap: 4px; justify-content: flex-start; overflow-x: auto; scrollbar-width: none; }
  .reader-actions::-webkit-scrollbar { display: none; }
  .reader-actions > * { flex: 0 0 auto; }
  .palette-picker { order: -3; }
  #theme { order: -2; }
  .reader-actions .icon-button { min-width: 34px; }
  .mode-button { padding-inline: 8px; }
  .file-heading p { display: none; }
  .reader-shell[data-mode="horizontal"] .content,
  .reader-shell[data-mode="paged"] .content {
    width: calc(100% - 12px);
    height: calc(100vh - 135px);
    margin-top: 6px;
    border-radius: 12px;
  }
  .reader-shell[data-mode="horizontal"] .content { column-width: 78vw; padding: 30px 28px; column-gap: 48px; }
  .reader-shell[data-mode="paged"] .content { --page-pad: 28px; padding: 30px var(--page-pad) 42px; column-gap: 56px; }
}

/* Kainnne LumaReader 2.0 interface */
html, body { min-height: 100%; }
body { overflow-x: hidden; }
button, input, select { font: inherit; }
button:focus-visible, input:focus-visible, select:focus-visible, a:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 72%, white);
  outline-offset: 2px;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 16px;
  padding: 2px 4px;
}
.brand-icon {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  border-radius: 13px;
  box-shadow: 0 8px 22px color-mix(in srgb, var(--accent) 24%, transparent);
}
.brand-row div { min-width: 0; display: grid; gap: 2px; }
.brand-row strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 14px; letter-spacing: .01em; }
.brand-row span { color: var(--muted); font-size: 11px; }

.sidebar-tools input {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 9px 11px;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  color: var(--ink);
  outline: none;
}
.sidebar-tools input:focus { border-color: var(--accent); }
.soft-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: color-mix(in srgb, var(--accent-soft) 52%, var(--paper));
  color: var(--accent-strong);
  cursor: pointer;
}
.soft-button:hover { border-color: var(--accent); background: var(--accent-soft); }
.sidebar-tools { padding-bottom: 10px; }

.sidebar-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  margin: 0 2px 8px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: color-mix(in srgb, var(--paper) 46%, transparent);
}
.sidebar-tab {
  min-height: 31px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}
.sidebar-tab.active { background: var(--paper); color: var(--accent-strong); box-shadow: 0 4px 12px color-mix(in srgb, var(--accent-strong) 10%, transparent); }
.sidebar-panel { flex: 1; min-height: 0; overflow: auto; padding: 2px 2px 30px; }
.sidebar-panel[hidden] { display: none; }
.outline-item {
  display: block;
  width: 100%;
  padding: 7px 8px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  font-size: 12px;
  line-height: 1.35;
  cursor: pointer;
}
.outline-item:hover { background: color-mix(in srgb, var(--paper) 72%, transparent); color: var(--accent-strong); }
.outline-item.level-2 { padding-left: 17px; }
.outline-item.level-3 { padding-left: 28px; color: var(--muted); }
.outline-item.level-4 { padding-left: 39px; color: var(--muted); }
.sidebar-empty { margin: 22px 10px; color: var(--muted); font-size: 12px; line-height: 1.6; text-align: center; }

.reader-bar {
  min-height: 76px;
  padding: 10px clamp(14px, 2.2vw, 30px);
}
.reader-actions {
  max-width: min(100%, 1120px);
  flex-wrap: wrap;
  row-gap: 5px;
}
.labeled-button { display: inline-flex; grid-auto-flow: column; gap: 6px; padding: 0 10px; white-space: nowrap; }

.palette-control { position: relative; flex: 0 0 auto; }
.palette-button, .language-picker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 5px 14px color-mix(in srgb, var(--accent-strong) 8%, transparent);
}
.palette-button { padding: 0 9px; cursor: pointer; }
.palette-button:hover, .language-picker:hover { border-color: var(--accent); }
.palette-swatch { display: inline-flex; align-items: center; gap: 0; overflow: hidden; border: 1px solid color-mix(in srgb, var(--ink) 12%, transparent); border-radius: 999px; }
.palette-swatch i { display: block; width: 12px; height: 18px; background: var(--swatch); }
.palette-menu {
  position: absolute;
  top: calc(100% + 9px);
  right: 0;
  z-index: 40;
  width: min(285px, calc(100vw - 24px));
  max-height: min(520px, calc(100vh - 110px));
  overflow: auto;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: color-mix(in srgb, var(--paper) 95%, transparent);
  box-shadow: 0 22px 52px color-mix(in srgb, var(--accent-strong) 22%, transparent);
  backdrop-filter: blur(20px) saturate(1.1);
}
.palette-menu[hidden] { display: none; }
.palette-option {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 18px;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 40px;
  padding: 5px 8px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}
.palette-option:hover, .palette-option[aria-checked="true"] { background: var(--accent-soft); color: var(--accent-strong); }
.palette-option .palette-swatch i { width: 17px; height: 22px; }
.palette-option b { color: var(--accent); text-align: center; }
.language-picker { padding: 0 5px 0 9px; }
.language-picker select { max-width: 142px; min-width: 80px; border: 0; outline: 0; background: transparent; color: var(--ink); cursor: pointer; }

.progress-track { top: 75px; }
.document-stage { min-width: 0; position: relative; }
.raw-source {
  --paper: var(--reader-paper);
  --ink: var(--reader-ink);
  --muted: var(--reader-muted);
  --line: var(--reader-line);
  --code: var(--reader-code);
  width: min(980px, calc(100% - 48px));
  min-height: calc(100vh - 126px);
  margin: 26px auto 64px;
  padding: clamp(24px, 4vw, 52px);
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--shadow);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: var(--reader-size);
  line-height: 1.65;
  tab-size: 2;
  white-space: pre;
}
.raw-source[hidden] { display: none; }
.source-editor {
  --paper: var(--reader-paper);
  --ink: var(--reader-ink);
  --muted: var(--reader-muted);
  --line: var(--reader-line);
  --code: var(--reader-code);
  display: block;
  width: min(980px, calc(100% - 48px));
  height: calc(100vh - 126px);
  min-height: 420px;
  margin: 26px auto 32px;
  padding: clamp(24px, 4vw, 52px);
  overflow: auto;
  resize: none;
  border: 1px solid color-mix(in srgb, var(--accent) 62%, var(--line));
  border-radius: 18px;
  outline: none;
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--shadow), 0 0 0 3px color-mix(in srgb, var(--accent-soft) 70%, transparent);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: var(--reader-size);
  line-height: 1.65;
  tab-size: 2;
  white-space: pre;
}
.source-editor:focus { border-color: var(--accent); box-shadow: var(--shadow), 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent); }
.source-editor[hidden] { display: none; }
.editor-button.is-editing {
  border-color: color-mix(in srgb, var(--accent-strong) 72%, var(--line));
  background: linear-gradient(125deg, var(--accent), var(--accent-strong));
  color: white;
  box-shadow: 0 7px 18px color-mix(in srgb, var(--accent-strong) 24%, transparent);
}
.editor-button.is-editing:not(.is-dirty) { box-shadow: 0 5px 14px color-mix(in srgb, var(--accent-strong) 14%, transparent); }
.editor-button.is-dirty::after {
  width: 6px;
  height: 6px;
  margin-left: -2px;
  border-radius: 50%;
  background: currentColor;
  content: "";
}
.editor-cancel-button { color: var(--muted); }
.editor-cancel-button:hover { border-color: color-mix(in srgb, #b74664 48%, var(--line)); color: #b74664; }
.editor-button[hidden],
.editor-cancel-button[hidden] { display: none; }
@keyframes luma-pulse { 50% { opacity: .35; transform: scale(.72); } }

.prose :where(img, video, audio, svg, canvas) { max-width: 100%; }
.prose video, .prose audio { display: block; width: min(100%, 720px); margin: 1.4em auto; }
.prose .katex-display, .prose .mermaid { max-width: 100%; overflow-x: auto; overflow-y: hidden; padding: 6px 0; }
.prose .mermaid { margin: 1.7em 0; text-align: center; }
.prose .mermaid svg { max-width: 100%; height: auto; }
.prose pre { position: relative; max-width: 100%; }
.copy-code {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  color: var(--muted);
  font: 11px var(--sans);
  cursor: pointer;
}
.prose input[type="checkbox"] { accent-color: var(--accent); transform: translateY(1px); }
.prose abbr { text-decoration: underline dotted var(--accent); text-underline-offset: 3px; cursor: help; }
.footnotes { margin-top: 3em; padding-top: 1.2em; border-top: 1px solid var(--line); font-size: .86em; color: var(--muted); }
.callout { --callout-color: var(--accent); border-left-color: var(--callout-color) !important; border-radius: 0 10px 10px 0; }
.callout > p:first-child > strong { color: var(--callout-color); font-family: var(--sans); font-size: .78em; letter-spacing: .08em; }
.callout-tip { --callout-color: #369c71; }
.callout-important { --callout-color: #735fc7; }
.callout-warning { --callout-color: #c5862e; }
.callout-caution { --callout-color: #c1535d; }

.media-panel {
  position: fixed;
  inset: 0 0 0 auto;
  z-index: 60;
  width: min(410px, 92vw);
  display: flex;
  flex-direction: column;
  transform: translateX(104%);
  transition: transform .22s ease;
  background: color-mix(in srgb, var(--paper) 96%, transparent);
  border-left: 1px solid var(--line);
  box-shadow: -22px 0 58px color-mix(in srgb, var(--accent-strong) 18%, transparent);
  backdrop-filter: blur(22px);
}
.media-panel.open { transform: translateX(0); }
.media-panel > header { display: flex; align-items: center; justify-content: space-between; min-height: 64px; padding: 12px 15px 12px 20px; border-bottom: 1px solid var(--line); }
.media-panel > header div { display: grid; gap: 2px; }
.media-panel > header span { color: var(--muted); font-size: 11px; }
.media-grid { flex: 1; overflow: auto; padding: 15px; }
.media-grid figure { margin: 0 0 14px; overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: var(--code); }
.media-grid img, .media-grid video { display: block; width: auto; max-width: 100%; max-height: 62vh; height: auto; margin: auto; object-fit: contain; }
.media-grid img { cursor: zoom-in; }
.media-grid audio { display: block; width: calc(100% - 20px); margin: 14px 10px; }
.media-grid figcaption { padding: 8px 10px; color: var(--muted); font-size: 11px; overflow-wrap: anywhere; }
.panel-scrim { position: fixed; inset: 0; z-index: 55; background: rgba(20,14,18,.28); backdrop-filter: blur(2px); }
.panel-scrim[hidden] { display: none; }
.image-viewer {
  width: min(1120px, calc(100vw - 32px));
  height: min(880px, calc(100vh - 32px));
  max-width: none;
  max-height: none;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 26px 90px rgba(20,14,18,.28);
}
.image-viewer::backdrop { background: rgba(20,14,18,.58); backdrop-filter: blur(5px); }
.image-viewer[open] { display: grid; grid-template-rows: auto minmax(0,1fr) auto; }
.image-viewer-bar { display: flex; align-items: center; justify-content: space-between; gap: 14px; min-height: 58px; padding: 9px 12px 9px 18px; border-bottom: 1px solid var(--line); }
.image-viewer-bar > div { display: flex; align-items: center; gap: 8px; }
.image-viewer-stage { position: relative; min-width: 0; min-height: 0; overflow: hidden; padding: 18px; background: color-mix(in srgb, var(--code) 72%, transparent); }
.image-viewer-image { position: absolute; inset: 0; display: block; width: auto; max-width: calc(100% - 36px); max-height: calc(100% - 36px); height: auto; margin: auto; object-fit: contain; }
.image-viewer.actual-size .image-viewer-stage { overflow: auto; }
.image-viewer.actual-size .image-viewer-image { position: static; max-width: none; max-height: none; margin: auto; }
.image-viewer-caption { min-height: 42px; margin: 0; padding: 11px 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; overflow-wrap: anywhere; }
.toast {
  position: fixed;
  left: calc(320px + (100vw - 320px) / 2);
  bottom: 28px;
  z-index: 100;
  max-width: min(420px, calc(100vw - 32px));
  transform: translateX(-50%);
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--shadow);
  font-size: 12px;
}
.toast[hidden] { display: none; }
.toast[data-tone="editing"] {
  top: 74px;
  bottom: auto;
  display: flex;
  align-items: center;
  gap: 11px;
  width: min(390px, calc(100vw - 32px));
  max-width: min(390px, calc(100vw - 32px));
  padding: 12px 14px 12px 12px;
  border-color: color-mix(in srgb, var(--accent) 52%, var(--line));
  border-radius: 16px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent-soft) 72%, var(--paper)), var(--paper));
  box-shadow: 0 18px 48px color-mix(in srgb, var(--accent-strong) 18%, transparent), var(--shadow);
  animation: editing-notice-in .2s ease-out;
}
.toast-notice-icon {
  display: grid;
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--accent) 55%, var(--line));
  border-radius: 11px;
  background: color-mix(in srgb, var(--accent) 18%, var(--paper));
  color: var(--accent-strong);
  font-size: 17px;
  font-weight: 800;
}
.toast-notice-copy { display: grid; min-width: 0; gap: 3px; line-height: 1.35; }
.toast-notice-copy strong { color: var(--ink); font-size: 12px; }
.toast-notice-copy > span { color: var(--muted); font-size: 11px; }
body.editor-blocked-hint #edit-document,
body.editor-blocked-hint #cancel-edit { animation: editing-action-hint .52s ease-out 2; }
@keyframes editing-notice-in {
  from { opacity: 0; transform: translate(-50%, -8px) scale(.98); }
  to { opacity: 1; transform: translate(-50%, 0) scale(1); }
}
@keyframes editing-action-hint {
  50% { box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 22%, transparent); }
}

.reader-shell[data-mode="horizontal"] .document-stage,
.reader-shell[data-mode="paged"] .document-stage { min-height: 0; }
.reader-shell[data-mode="horizontal"] .raw-source,
.reader-shell[data-mode="paged"] .raw-source {
  width: calc(100% - 28px);
  height: calc(100vh - 105px);
  min-height: 0;
  margin: 14px auto 15px;
  overflow: auto;
}

@media (min-width: 1600px) {
  .app { grid-template-columns: 340px minmax(0, 1fr); }
  .sidebar { width: 340px; }
  .progress-track { left: 340px; }
  .content { width: min(960px, calc(100% - 80px)); }
  .toast { left: calc(340px + (100vw - 340px) / 2); }
  .reader-shell[data-mode="horizontal"] .content { column-width: min(40rem, 35vw); column-gap: 5.5rem; padding-inline: 5vw; }
}

@media (max-width: 1180px) and (min-width: 821px) {
  .app { grid-template-columns: 280px minmax(0, 1fr); }
  .sidebar { width: 280px; }
  .progress-track { left: 280px; }
  .reader-bar { align-items: flex-start; }
  .reader-actions { max-width: 620px; }
  .file-heading { padding-top: 7px; }
  .labeled-button span:last-child, #palette-name { display: none; }
  .toast { left: calc(280px + (100vw - 280px) / 2); }
}

@media (max-width: 820px) {
  .sidebar { width: min(330px, 88vw); padding-top: max(14px, env(safe-area-inset-top)); z-index: 80; }
  .reader-bar { min-height: 118px; padding: 9px 10px; }
  .file-heading { flex: 1 1 calc(100% - 52px); }
  .reader-actions { flex-wrap: nowrap; width: 100%; padding: 2px 0; overflow-x: auto; }
  .reader-actions > * { flex: 0 0 auto; }
  .palette-control { order: -3; }
  .language-picker { order: -2; }
  #theme { order: -1; }
  .progress-track { top: 117px; }
  .content, .raw-source { width: calc(100% - 16px); margin: 8px auto 32px; padding: 26px clamp(18px, 6vw, 38px) 48px; border-radius: 12px; }
  .reader-shell[data-mode="horizontal"] .content,
  .reader-shell[data-mode="paged"] .content,
  .reader-shell[data-mode="horizontal"] .raw-source,
  .reader-shell[data-mode="paged"] .raw-source { height: calc(100vh - 127px); }
  .palette-menu { position: fixed; top: 113px; right: 10px; max-height: calc(100vh - 126px); }
  .toast { left: 50%; bottom: 22px; }
}

@media (max-width: 520px) {
  .reader-bar { min-height: 112px; }
  .progress-track { top: 111px; }
  .file-heading h1 { font-size: 16px; }
  .reader-actions { gap: 4px; }
  .mode-button { padding-inline: 8px; }
  .labeled-button span:last-child, #palette-name { display: none; }
  .language-picker select { max-width: 92px; }
  .palette-swatch i { width: 10px; }
  .content { font-size: calc(var(--reader-size) * .96); }
  .reader-shell[data-mode="horizontal"] .content,
  .reader-shell[data-mode="paged"] .content,
  .reader-shell[data-mode="horizontal"] .raw-source,
  .reader-shell[data-mode="paged"] .raw-source { height: calc(100vh - 121px); }
}

@media (max-height: 650px) and (min-width: 821px) {
  .brand-row { margin-bottom: 9px; }
  .brand-icon { width: 35px; height: 35px; }
  .sidebar { padding-block: 10px; }
  .reader-bar { min-height: 62px; padding-block: 6px; }
  .progress-track { top: 61px; }
  .content { margin-top: 14px; padding-top: 34px; }
  .reader-shell[data-mode="horizontal"] .content,
  .reader-shell[data-mode="paged"] .content,
  .reader-shell[data-mode="horizontal"] .raw-source,
  .reader-shell[data-mode="paged"] .raw-source { height: calc(100vh - 80px); margin-top: 8px; }
  .palette-menu { max-height: calc(100vh - 76px); }
}

@media (max-height: 650px) and (min-width: 821px) and (max-width: 1180px) {
  .progress-track { top: 91px; }
  .reader-shell[data-mode="horizontal"] .content,
  .reader-shell[data-mode="paged"] .content,
  .reader-shell[data-mode="horizontal"] .raw-source,
  .reader-shell[data-mode="paged"] .raw-source { height: calc(100vh - 110px); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* Plain-text adapter and safe error states. */
.content.adapter-content {
  width: calc(100% - 48px);
  max-width: none;
  height: calc(100vh - 116px);
  padding: 0;
  overflow: hidden;
  border-radius: 16px;
}

.reader-shell[data-mode="horizontal"] .content.adapter-content,
.reader-shell[data-mode="paged"] .content.adapter-content {
  columns: auto;
  column-width: auto;
  column-gap: 0;
  padding: 0;
  overflow: hidden;
}

.document-message {
  --paper: var(--reader-paper);
  --ink: var(--reader-ink);
  --muted: var(--reader-muted);
  --line: var(--reader-line);
  --code: var(--reader-code);
  width: min(540px, calc(100% - 48px));
  margin: clamp(54px, 10vh, 110px) auto;
  padding: clamp(24px, 4vw, 42px);
  border: 1px solid var(--line);
  border-radius: 22px;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  color: var(--ink);
  box-shadow: var(--shadow);
  text-align: center;
}

.document-message-badge {
  display: inline-grid;
  min-width: 54px;
  min-height: 34px;
  place-items: center;
  padding: 0 11px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: .08em;
}

.document-message h2 { margin: 17px 0 8px; font: 700 clamp(20px, 3vw, 30px)/1.18 var(--serif); }
.document-message p { margin: 0; color: var(--muted); line-height: 1.65; }

@media (max-width: 820px) {
  .content.adapter-content { width: calc(100% - 22px); height: calc(100vh - 144px); border-radius: 13px; }
  .document-message { width: calc(100% - 24px); }
}

/* Electron repository: compact controls and persistent sidebar */
:root {
  --control-height: 34px;
  --control-radius: 9px;
  --control-font: 12px;
}

.app,
.sidebar,
.reader-shell,
.sidebar-toggle { transition: grid-template-columns .2s ease, transform .2s ease, left .2s ease; }

.sidebar { padding: 14px 13px; }
.brand-row {
  min-height: 44px;
  margin-bottom: 11px;
  padding: 1px 40px 1px 2px;
}
.brand-row strong {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
}
.brand-icon { width: 38px; height: 38px; border-radius: 11px; }

.sidebar-toggle {
  position: fixed;
  top: 18px;
  left: 274px;
  z-index: 90;
  width: 32px;
  min-width: 32px;
  min-height: 32px;
  border-radius: 9px;
  font-size: 25px;
  font-weight: 800;
  line-height: 1;
}
.brand-refresh {
  width: 32px;
  min-width: 32px;
  min-height: 32px;
  height: 32px;
  margin-left: auto;
  flex: 0 0 32px;
  border-radius: 9px;
  font-size: 17px;
  line-height: 1;
}

.library-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  margin-bottom: 9px;
}

.export-pdf-button { display: none !important; }
.compact-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: var(--control-height);
  min-width: 0;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: var(--control-radius);
  background: color-mix(in srgb, var(--paper) 90%, var(--accent-soft));
  color: var(--ink);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--accent-strong) 7%, transparent);
  font-size: var(--control-font);
  font-weight: 650;
  cursor: pointer;
}
.compact-button:hover { border-color: var(--accent); color: var(--accent-strong); background: var(--accent-soft); }
.compact-button:disabled { opacity: .48; cursor: not-allowed; box-shadow: none; }
.new-markdown-button:not(:disabled) { border-color: color-mix(in srgb, var(--accent) 34%, var(--line)); }
.sidebar-tools input {
  height: var(--control-height);
  padding: 0 10px;
  border-radius: var(--control-radius);
  font-size: var(--control-font);
}
.sidebar-tools {
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding-bottom: 8px;
}
.icon-button,
.palette-button,
.language-picker,
.reading-mode-control {
  min-height: var(--control-height);
  height: var(--control-height);
  border-radius: var(--control-radius);
  font-size: var(--control-font);
}
.icon-button { min-width: var(--control-height); }
.labeled-button { padding-inline: 9px; }
.palette-button { padding-inline: 8px; }
.language-picker { padding-left: 8px; }
.language-picker select { width: 94px; min-width: 0; max-width: 94px; font-size: var(--control-font); }
.reading-mode-control { padding-inline: 8px; }
.reading-mode-control select { width: 70px; font-size: var(--control-font); }
.mode-switch { min-height: var(--control-height); padding: 2px; border-radius: 10px; }
.mode-button { min-height: 28px; padding: 3px 9px; border-radius: 7px; font-size: var(--control-font); }

.reader-bar {
  min-height: 64px;
  padding: 9px 18px;
  gap: 10px;
}
.reader-actions {
  max-width: none;
  flex-wrap: nowrap;
  gap: 5px;
}
.file-heading h1 { font-size: 17px; }
.file-heading p { margin-top: 2px; }
.progress-track {
  position: sticky;
  top: 0;
  left: auto;
  right: auto;
  width: 100%;
  z-index: 8;
}

body.sidebar-collapsed .app { grid-template-columns: 0 minmax(0, 1fr); }
body.sidebar-collapsed .sidebar { transform: translateX(-104%); }
body.sidebar-collapsed .reader-shell { grid-column: 1 / -1; }
body.sidebar-collapsed .sidebar-toggle { left: 14px; }
body.sidebar-collapsed .reader-bar { padding-left: 58px; }
body.sidebar-collapsed .content,
body.sidebar-collapsed .raw-source,
body.sidebar-collapsed .source-editor { width: calc(100% - 48px); max-width: none; }
body.sidebar-collapsed .toast { left: 50%; }

@media (min-width: 1600px) {
  .sidebar-toggle { left: 294px; }
  body.sidebar-collapsed .sidebar-toggle { left: 14px; }
}

@media (max-width: 1180px) and (min-width: 821px) {
  .sidebar-toggle { left: 234px; }
  .reader-bar {
    min-height: 102px;
    flex-wrap: wrap;
    align-content: center;
  }
  .file-heading { flex: 1 1 100%; padding: 0; }
  .file-heading p { display: none; }
  .reader-actions {
    flex: 1 1 100%;
    width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .reader-actions::-webkit-scrollbar { display: none; }
  body.sidebar-collapsed .sidebar-toggle { left: 14px; }
}

@media (max-width: 820px) {
  .app { display: block; }
  .sidebar {
    width: min(300px, 86vw);
    transform: translateX(-104%);
    transition: transform .2s ease;
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-toggle,
  body.sidebar-collapsed .sidebar-toggle {
    top: 11px;
    left: 11px;
  }
  .sidebar.open + .sidebar-toggle { left: min(254px, calc(86vw - 46px)); }
  body.sidebar-open::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 70;
    background: rgba(24, 15, 20, .25);
    backdrop-filter: blur(2px);
  }
  .reader-shell { grid-column: auto; }
  .reader-bar {
    min-height: 104px;
    padding: 8px 9px 8px 54px;
    flex-wrap: wrap;
    align-content: center;
  }
  .file-heading { flex: 1 1 100%; }
  .file-heading h1 { font-size: 15px; }
  .file-heading p { display: none; }
  .reader-actions {
    flex: 1 1 100%;
    width: 100%;
    flex-wrap: wrap;
    justify-content: flex-start;
    overflow: visible;
    gap: 4px;
  }
  .reader-actions > * { flex: 0 0 auto; }
  .palette-control,
  .language-picker,
  #theme { order: initial; }
  .palette-menu {
    position: fixed;
    top: 54px;
    right: 9px;
    max-height: calc(100vh - 66px);
  }
  .content,
  .raw-source { margin-top: 8px; }
}

@media (max-width: 560px) {
  .reader-bar { min-height: 142px; }
  .reader-actions { padding-right: 2px; }
  .labeled-button span:last-child,
  #palette-name { display: none; }
  .language-picker select { width: 74px; max-width: 74px; }
  .mode-button { padding-inline: 7px; }
  .content,
  .raw-source { width: calc(100% - 12px); padding-inline: 18px; }
  .reader-shell[data-mode="horizontal"] .content,
  .reader-shell[data-mode="paged"] .content,
  .reader-shell[data-mode="horizontal"] .raw-source,
  .reader-shell[data-mode="paged"] .raw-source { height: calc(100vh - 158px); }
}

@media (max-height: 650px) and (min-width: 821px) {
  .reader-bar { min-height: 58px; }
  .file-heading p { display: none; }
  .reader-shell[data-mode="horizontal"] .content,
  .reader-shell[data-mode="paged"] .content,
  .reader-shell[data-mode="horizontal"] .raw-source,
  .reader-shell[data-mode="paged"] .raw-source { height: calc(100vh - 76px); }
}

/* LumaReader text-format selector and first-launch guide. */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.format-filter {
  position: relative;
  margin: -1px 0 9px;
}
.format-filter[hidden] { display: none; }
.format-filter-toggle {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr) 16px;
  align-items: center;
  gap: 6px;
  width: 100%;
  min-height: 30px;
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: color-mix(in srgb, var(--paper) 68%, transparent);
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  transition: border-color .16s ease, color .16s ease, background .16s ease;
}
.format-filter-toggle:hover,
.format-filter-toggle[aria-expanded="true"] {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent-soft) 46%, var(--paper));
  color: var(--accent-strong);
}
.format-filter-icon {
  display: grid;
  place-items: center;
  width: 18px;
  height: 18px;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 14px;
}
.format-filter-chevron {
  justify-self: end;
  font-size: 13px;
  transition: transform .16s ease;
}
.format-filter-toggle[aria-expanded="true"] .format-filter-chevron { transform: rotate(180deg); }
.format-filter-popover {
  position: absolute;
  top: calc(100% + 7px);
  left: 0;
  z-index: 120;
  width: 100%;
  max-height: min(560px, calc(100vh - 240px));
  overflow: auto;
  overscroll-behavior: contain;
  padding: 9px;
  border: 1px solid color-mix(in srgb, var(--accent) 34%, var(--line));
  border-radius: 14px;
  background: color-mix(in srgb, var(--paper) 97%, transparent);
  box-shadow: 0 22px 55px color-mix(in srgb, var(--accent-strong) 24%, transparent);
  backdrop-filter: blur(22px) saturate(1.1);
}
.format-filter-popover[hidden] { display: none; }
.format-filter-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 2px 2px 8px 4px;
}
.format-filter-header > div { display: grid; gap: 2px; }
.format-filter-header strong { font-size: 12px; }
.format-filter-header span { color: var(--muted); font-size: 10px; }
.format-filter-close {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 18px;
  cursor: pointer;
}
.format-filter-close:hover { background: var(--accent-soft); color: var(--accent-strong); }
.format-filter-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
  padding-bottom: 8px;
}
.format-filter-actions button {
  min-height: 29px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--paper) 78%, var(--accent-soft));
  color: var(--accent-strong);
  font-size: 10px;
  font-weight: 700;
  cursor: pointer;
}
.format-filter-actions button:hover { border-color: var(--accent); background: var(--accent-soft); }
.format-categories { display: grid; gap: 5px; }
.format-category {
  overflow: clip;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: color-mix(in srgb, var(--page) 42%, transparent);
}
.format-category summary {
  display: grid;
  grid-template-columns: 16px 18px minmax(0, 1fr);
  align-items: center;
  gap: 6px;
  min-height: 39px;
  padding: 5px 7px;
  list-style: none;
  cursor: pointer;
}
.format-category summary::-webkit-details-marker { display: none; }
.format-category summary:hover { background: color-mix(in srgb, var(--paper) 68%, transparent); }
.category-disclosure {
  color: var(--muted);
  font-size: 18px;
  line-height: 1;
  transition: transform .16s ease;
}
.format-category[open] .category-disclosure { transform: rotate(90deg); }
.format-category input { margin: 0; accent-color: var(--accent); }
.format-category summary label { display: grid; gap: 1px; min-width: 0; cursor: pointer; }
.format-category summary label strong { font-size: 11px; }
.format-category summary label span { overflow: hidden; color: var(--muted); font-size: 9px; text-overflow: ellipsis; white-space: nowrap; }
.format-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  padding: 1px 7px 7px 31px;
}
.format-options label {
  display: flex;
  align-items: center;
  gap: 5px;
  min-width: 0;
  min-height: 25px;
  padding: 3px 5px;
  border-radius: 6px;
  color: var(--ink);
  font-size: 9px;
  font-weight: 730;
  cursor: pointer;
}
.format-options label:hover { background: var(--accent-soft); color: var(--accent-strong); }
.format-options small {
  display: block;
  color: var(--accent);
  font-size: 7px;
  font-weight: 700;
  line-height: 1.1;
  text-transform: uppercase;
}
.format-filter-footer { padding: 8px 4px 1px; color: var(--muted); font-size: 9px; line-height: 1.4; }
.text-format-options { padding: 5px; border: 1px solid var(--line); border-radius: 10px; background: color-mix(in srgb, var(--page) 42%, transparent); }
.text-format-options input { margin: 0; accent-color: var(--accent); }

/* Lightweight first-launch tour. */
.onboarding {
  position: fixed;
  inset: 0;
  z-index: 260;
  background: rgba(17, 13, 17, .42);
  backdrop-filter: blur(2px);
}
.onboarding[hidden] { display: none; }
.onboarding-spotlight {
  position: fixed;
  top: var(--tour-top, 20px);
  left: var(--tour-left, 20px);
  width: var(--tour-width, 180px);
  height: var(--tour-height, 48px);
  border: 2px solid rgba(255,255,255,.92);
  border-radius: 13px;
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent) 50%, transparent), 0 12px 40px rgba(0,0,0,.28);
  pointer-events: none;
  transition: inset .2s ease, width .2s ease, height .2s ease;
}
.onboarding-card {
  position: fixed;
  top: var(--tour-card-top, 90px);
  left: var(--tour-card-left, 20px);
  width: min(328px, calc(100vw - 24px));
  padding: 18px;
  border: 1px solid color-mix(in srgb, var(--accent) 38%, var(--line));
  border-radius: 17px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 28px 72px rgba(20, 12, 18, .34);
}
.onboarding-progress { display: flex; gap: 5px; margin-bottom: 16px; }
.onboarding-progress span { display: block; width: 22px; height: 3px; border-radius: 999px; background: var(--line); }
.onboarding-progress span.active { background: var(--accent); }
.onboarding-kicker { margin: 0 0 5px; color: var(--accent); font-size: 10px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.onboarding-card h2 { margin: 0 0 8px; font-family: var(--serif); font-size: 21px; }
.onboarding-card > p:not(.onboarding-kicker) { min-height: 44px; margin: 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
.onboarding-actions { display: flex; align-items: center; justify-content: space-between; gap: 9px; margin-top: 18px; }
.onboarding-actions button { min-height: 36px; padding: 0 13px; border-radius: 10px; font-size: 11px; font-weight: 750; cursor: pointer; }
.onboarding-skip { border: 0; background: transparent; color: var(--muted); }
.onboarding-skip:hover { color: var(--accent-strong); }
.onboarding-next { border: 0; background: linear-gradient(125deg, var(--accent), var(--accent-strong)); color: white; box-shadow: 0 7px 18px color-mix(in srgb, var(--accent-strong) 24%, transparent); }
/* Visible, draggable scrollbars in every reading direction. */
html,
.content,
.raw-source,
.source-editor,
.sidebar-panel,
.format-filter-popover,
.luma-plain-viewport {
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--accent) 58%, var(--muted)) color-mix(in srgb, var(--panel) 54%, transparent);
}
:where(html, .content, .raw-source, .sidebar-panel, .format-filter-popover, .luma-plain-viewport)::-webkit-scrollbar {
  display: block;
  width: 10px;
  height: 10px;
}
:where(.source-editor)::-webkit-scrollbar {
  display: block;
  width: 10px;
  height: 10px;
}
:where(.source-editor)::-webkit-scrollbar-track {
  background: color-mix(in srgb, var(--panel) 54%, transparent);
  border-radius: 999px;
}
:where(.source-editor)::-webkit-scrollbar-thumb {
  min-width: 38px;
  min-height: 38px;
  border: 2px solid transparent;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 58%, var(--muted));
  background-clip: padding-box;
}
:where(.source-editor)::-webkit-scrollbar-thumb:hover { background: var(--accent); background-clip: padding-box; }
:where(html, .content, .raw-source, .sidebar-panel, .format-filter-popover, .luma-plain-viewport)::-webkit-scrollbar-track {
  background: color-mix(in srgb, var(--panel) 54%, transparent);
  border-radius: 999px;
}
:where(html, .content, .raw-source, .sidebar-panel, .format-filter-popover, .luma-plain-viewport)::-webkit-scrollbar-thumb {
  min-width: 38px;
  min-height: 38px;
  border: 2px solid transparent;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 58%, var(--muted));
  background-clip: padding-box;
}
:where(html, .content, .raw-source, .sidebar-panel, .format-filter-popover, .luma-plain-viewport)::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
  background-clip: padding-box;
}
.reader-shell[data-mode="horizontal"] .content,
.reader-shell[data-mode="paged"] .content { scrollbar-width: thin; padding-bottom: max(46px, calc(38px + env(safe-area-inset-bottom))); }
.reader-shell[data-mode="horizontal"] .content::-webkit-scrollbar,
.reader-shell[data-mode="paged"] .content::-webkit-scrollbar { display: block; height: 11px; }

@media (max-width: 820px) {
  .brand-row { padding-right: 38px; }
  .format-filter-popover {
    position: fixed;
    top: max(12px, env(safe-area-inset-top));
    left: 8px;
    width: min(316px, calc(100vw - 16px));
    max-height: calc(100dvh - 24px);
    z-index: 210;
  }
  .panel-scrim { z-index: 210; }
  .onboarding-card { top: auto; right: 12px; bottom: max(12px, env(safe-area-inset-bottom)); left: 12px; width: auto; }
  .onboarding-spotlight { transition: none; }
}

@media (max-width: 430px) {
  .format-options { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .format-options label { padding-inline: 3px; }
  .format-options small { display: none; }
  #media-view span:last-child { display: none; }
}

/* Adjustable desktop document sidebar. */
:root { --sidebar-width: 320px; }
.sidebar-resizer { display: none; }
@media (min-width: 821px) {
  .app { grid-template-columns: var(--sidebar-width) minmax(0, 1fr); }
  .sidebar { width: var(--sidebar-width); }
  .sidebar-toggle { left: calc(var(--sidebar-width) - 46px); }
  .toast { left: calc(var(--sidebar-width) + (100vw - var(--sidebar-width)) / 2); }
  .sidebar-resizer {
    position: absolute;
    top: 0;
    right: -6px;
    bottom: 0;
    z-index: 95;
    display: block;
    width: 12px;
    cursor: col-resize;
    touch-action: none;
  }
  .sidebar-resizer::after {
    content: "";
    position: absolute;
    top: 0;
    right: 5px;
    bottom: 0;
    width: 2px;
    background: transparent;
    transition: background .16s ease, box-shadow .16s ease;
  }
  .sidebar-resizer:hover::after,
  .sidebar-resizer:focus-visible::after,
  body.sidebar-resizing .sidebar-resizer::after {
    background: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 14%, transparent);
  }
  .sidebar-resizer:focus-visible { outline: none; }
  body.sidebar-resizing,
  body.sidebar-resizing * { cursor: col-resize !important; user-select: none !important; }
  body.sidebar-resizing .app,
  body.sidebar-resizing .sidebar,
  body.sidebar-resizing .reader-shell,
  body.sidebar-resizing .sidebar-toggle { transition: none; }
  body.sidebar-collapsed .sidebar-resizer { display: none; }
}

/* Elapsed scan timer with a non-blocking duration estimate. */
.content.library-scanning-active { cursor: wait; }
.library-scan-status {
  min-height: calc(100vh - 250px);
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 11px;
  color: var(--ink);
  text-align: center;
}
.library-scan-status strong { font: 700 clamp(19px, 2.4vw, 28px)/1.3 var(--sans); font-variant-numeric: tabular-nums; }
.library-scan-status > span:last-child { color: var(--muted); font: 500 13px/1.65 var(--sans); }
.library-scan-spinner {
  width: 46px;
  height: 46px;
  border: 4px solid color-mix(in srgb, var(--accent) 20%, transparent);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: luma-scan-spin .8s linear infinite;
}
.reader-shell[data-mode="horizontal"] .content.library-scanning-active,
.reader-shell[data-mode="paged"] .content.library-scanning-active { columns: auto; display: grid; overflow: auto; }
.reader-shell[data-mode="horizontal"] .library-scan-status,
.reader-shell[data-mode="paged"] .library-scan-status { min-height: 100%; }
@keyframes luma-scan-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .library-scan-spinner { animation-duration: 1.8s; } }

/* Full-width vertical reading and immediate toolbar shortcut hints. */
.reader-shell[data-mode="vertical"] .content,
.reader-shell[data-mode="vertical"] .raw-source,
.reader-shell[data-mode="vertical"] .source-editor {
  width: calc(100% - 32px);
  max-width: none;
  margin-inline: auto;
}
.toolbar-tooltip {
  position: fixed;
  z-index: 500;
  max-width: calc(100vw - 16px);
  padding: 5px 8px;
  border: 1px solid color-mix(in srgb, var(--accent) 26%, var(--line));
  border-radius: 7px;
  background: color-mix(in srgb, var(--ink) 94%, transparent);
  color: var(--paper);
  box-shadow: 0 6px 18px rgba(20, 12, 18, .2);
  font: 650 10px/1.35 var(--sans);
  letter-spacing: .01em;
  white-space: nowrap;
  pointer-events: none;
}
.toolbar-tooltip[hidden] { display: none; }

@media (max-width: 820px) {
  .reader-shell[data-mode="vertical"] .content,
  .reader-shell[data-mode="vertical"] .raw-source,
  .reader-shell[data-mode="vertical"] .source-editor { width: calc(100% - 16px); }
}

.reader-shell[data-mode="horizontal"] .source-editor,
.reader-shell[data-mode="paged"] .source-editor {
  width: calc(100% - 28px);
  height: calc(100vh - 105px);
  min-height: 0;
  margin: 14px auto 15px;
}

@media (max-width: 820px) {
  .source-editor { width: calc(100% - 16px); height: calc(100vh - 126px); min-height: 300px; margin-top: 8px; }
}

@media (max-width: 560px) {
  .source-editor { width: calc(100% - 12px); height: calc(100vh - 158px); min-height: 260px; padding-inline: 18px; }
  .reader-shell[data-mode="horizontal"] .source-editor,
  .reader-shell[data-mode="paged"] .source-editor { height: calc(100vh - 158px); }
}

@media (max-height: 650px) and (min-width: 821px) {
  .source-editor,
  .reader-shell[data-mode="horizontal"] .source-editor,
  .reader-shell[data-mode="paged"] .source-editor { height: calc(100vh - 76px); min-height: 260px; }
}

/* Unified custom toolbar dropdowns: reading mode, palette, and language. */
.progress-track { display: none !important; }

.toolbar-dropdown {
  position: relative;
  flex: 0 0 auto;
  order: initial !important;
}
.toolbar-select-button {
  display: inline-grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 7px;
  width: 100%;
  height: var(--control-height, 34px);
  min-height: var(--control-height, 34px);
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: var(--control-radius, 10px);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  color: var(--ink);
  box-shadow: 0 5px 14px color-mix(in srgb, var(--accent-strong) 8%, transparent);
  font: 700 var(--control-font, 11px)/1 var(--sans);
  text-align: left;
  cursor: pointer;
  user-select: none;
  -webkit-app-region: no-drag;
}
.toolbar-select-button:hover,
.toolbar-select-button:focus-visible,
.toolbar-select-button.active {
  border-color: color-mix(in srgb, var(--accent) 76%, var(--line));
  background: color-mix(in srgb, var(--accent-soft) 45%, var(--paper));
  color: var(--accent-strong);
  outline: none;
}
.toolbar-select-button:focus-visible {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent), 0 5px 14px color-mix(in srgb, var(--accent-strong) 8%, transparent);
}
.dropdown-leading-icon {
  display: grid;
  place-items: center;
  width: 17px;
  min-width: 17px;
  color: var(--accent-strong);
  font-size: 13px;
  line-height: 1;
  pointer-events: none;
}
.dropdown-label {
  display: block;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  pointer-events: none;
}
.dropdown-chevron {
  display: block;
  margin-top: -2px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1;
  transition: transform .16s ease;
  pointer-events: none;
}
.toolbar-select-button[aria-expanded="true"] .dropdown-chevron { transform: rotate(180deg); }
.reading-mode-button { width: 104px; }
.palette-button { width: 128px; padding-inline: 8px; }
.language-button { width: 112px; }
.language-glyph { font-weight: 800; }
.toolbar-menu {
  position: fixed;
  right: auto;
  z-index: 700;
  overflow: auto;
  padding: 7px;
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--line));
  border-radius: 14px;
  background: color-mix(in srgb, var(--paper) 96%, transparent);
  box-shadow: 0 20px 54px color-mix(in srgb, var(--accent-strong) 24%, transparent);
  backdrop-filter: blur(22px) saturate(1.12);
  overscroll-behavior: contain;
}
.toolbar-menu[hidden] { display: none; }
.reading-mode-menu { width: 190px; }
.palette-menu { width: min(285px, calc(100vw - 16px)); }
.language-menu { width: min(224px, calc(100vw - 16px)); }
.toolbar-menu-option {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 9px;
  width: 100%;
  min-height: 39px;
  padding: 5px 8px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--ink);
  font: 650 12px/1.25 var(--sans);
  text-align: left;
  cursor: pointer;
}
.toolbar-menu-option:hover,
.toolbar-menu-option:focus-visible,
.toolbar-menu-option[aria-checked="true"] {
  background: var(--accent-soft);
  color: var(--accent-strong);
  outline: none;
}
.toolbar-menu-option:focus-visible { box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--accent) 28%, transparent); }
.toolbar-menu-option b { color: var(--accent); text-align: center; }
.menu-option-icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--accent-soft) 72%, var(--paper));
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 800;
}
.language-code { font-size: 9px; letter-spacing: .04em; }
.palette-option { grid-template-columns: auto minmax(0, 1fr) 18px; }
.palette-option .palette-swatch { width: 52px; }
.palette-option .palette-swatch i { flex: 1 1 0; width: auto; height: 24px; }
.reader-actions > #theme { order: initial !important; }

@media (max-width: 1180px) {
  #palette-name { display: block; }
  .reading-mode-button { width: 98px; }
  .palette-button { width: 116px; }
  .language-button { width: 104px; }
}

@media (max-width: 560px) {
  #palette-name { display: block; }
  .toolbar-select-button { gap: 5px; padding-inline: 7px; }
  .reading-mode-button { width: 94px; }
  .palette-button { width: 104px; }
  .language-button { width: 98px; }
}

@media (prefers-reduced-motion: reduce) {
  .dropdown-chevron { transition: none; }
}

.new-markdown-dialog {
  width: min(470px, calc(100vw - 32px));
  max-width: none;
  padding: 0;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--line));
  border-radius: 18px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 28px 90px rgba(22, 14, 20, .3);
}
.new-markdown-dialog::backdrop { background: rgba(25, 17, 23, .48); backdrop-filter: blur(5px); }
.new-markdown-dialog form { display: grid; gap: 18px; padding: 24px; }
.new-markdown-header { display: flex; align-items: flex-start; gap: 13px; }
.new-markdown-symbol {
  display: grid;
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--line));
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 19px;
  font-weight: 800;
}
.new-markdown-header h2 { margin: 0; font-size: 20px; line-height: 1.25; }
.new-markdown-header p { margin: 5px 0 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
.new-markdown-field { display: grid; gap: 7px; color: var(--muted); font-size: 11px; font-weight: 750; }
.new-markdown-input-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: color-mix(in srgb, var(--paper) 94%, var(--accent-soft));
  transition: border-color .15s ease, box-shadow .15s ease;
}
.new-markdown-input-wrap:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent); }
.new-markdown-input-wrap input {
  min-width: 0;
  height: 42px;
  padding: 0 2px 0 12px;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
}
.new-markdown-input-wrap > span { padding: 0 12px 0 6px; color: var(--muted); font-size: 13px; font-weight: 700; }
.new-markdown-destination { display: grid; gap: 5px; padding: 11px 12px; border: 1px solid var(--line); border-radius: 11px; background: var(--code); }
.new-markdown-destination > span { color: var(--muted); font-size: 10px; font-weight: 750; text-transform: uppercase; letter-spacing: .06em; }
.new-markdown-destination strong { overflow: hidden; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11px; line-height: 1.45; text-overflow: ellipsis; white-space: nowrap; }
.new-markdown-confirmation { min-height: 18px; margin: -5px 0 0; color: var(--muted); font-size: 12px; line-height: 1.5; }
.new-markdown-error { margin: -8px 0 0; color: #b83252; font-size: 12px; line-height: 1.45; }
.new-markdown-actions { display: flex; justify-content: flex-end; gap: 8px; padding-top: 2px; }
.new-markdown-actions .compact-button { min-width: 86px; }
.new-markdown-actions .primary-button { border-color: var(--accent-strong); background: var(--accent-strong); color: #fff; }
.new-markdown-actions .primary-button:hover { border-color: var(--accent); background: var(--accent); color: #fff; }

.session-dialog {
  width: min(480px, calc(100vw - 32px));
  max-width: none;
  padding: 0;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--line));
  border-radius: 18px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 28px 90px rgba(22, 14, 20, .3);
}
.session-dialog::backdrop { background: rgba(25, 17, 23, .48); backdrop-filter: blur(5px); }
.session-dialog form { display: grid; gap: 18px; padding: 24px; }
.session-dialog-header { display: flex; align-items: flex-start; gap: 13px; }
.session-dialog-symbol {
  display: grid;
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--line));
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 21px;
  font-weight: 700;
}
.session-dialog-header h2 { margin: 0; font-size: 20px; line-height: 1.25; }
.session-dialog-header p { margin: 6px 0 0; color: var(--muted); font-size: 12px; line-height: 1.6; }
.session-dialog-files { display: grid; gap: 7px; }
.session-dialog-files[hidden] { display: none; }
.session-dialog-file {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 6px 7px 6px 12px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: color-mix(in srgb, var(--paper) 92%, var(--accent-soft));
}
.session-dialog-file span { overflow: hidden; font-size: 12px; font-weight: 650; text-overflow: ellipsis; white-space: nowrap; }
.session-dialog-file button {
  min-width: 58px;
  height: 28px;
  padding: 0 9px;
  border: 1px solid color-mix(in srgb, #bd3d60 30%, var(--line));
  border-radius: 8px;
  background: color-mix(in srgb, #bd3d60 8%, var(--paper));
  color: #ad3155;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
}
.session-dialog-file button:hover { border-color: #ad3155; background: color-mix(in srgb, #bd3d60 14%, var(--paper)); }
.session-desktop-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid color-mix(in srgb, var(--accent) 24%, var(--line));
  border-radius: 11px;
  background: var(--accent-soft);
  color: var(--ink);
  font-size: 11px;
  line-height: 1.4;
  text-decoration: none;
}
.session-desktop-link[hidden] { display: none; }
.session-desktop-link strong { color: var(--accent-strong); white-space: nowrap; }
.session-desktop-link:hover { border-color: var(--accent); }
.session-dialog-actions { display: flex; justify-content: flex-end; gap: 8px; }
.session-dialog-actions .compact-button { min-width: 86px; }
.session-dialog-actions .primary-button { border-color: #ad3155; background: #ad3155; color: #fff; }
.session-dialog-actions .primary-button:hover { border-color: #c44a6b; background: #c44a6b; color: #fff; }
.session-dialog-actions .primary-button[hidden] { display: none; }

.share-dialog {
  width: min(520px, calc(100vw - 32px));
  max-width: none;
  padding: 0;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--accent) 34%, var(--line));
  border-radius: 20px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 30px 96px rgba(22, 14, 20, .32);
}
.share-dialog::backdrop { background: rgba(25, 17, 23, .48); backdrop-filter: blur(5px); }
.share-dialog form { display: grid; gap: 19px; padding: 25px; }
.share-dialog-header { display: flex; align-items: flex-start; gap: 13px; }
.share-dialog-symbol {
  display: grid;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--accent) 44%, var(--line));
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent-soft), color-mix(in srgb, var(--accent) 24%, var(--paper)));
  color: var(--accent-strong);
  box-shadow: 0 9px 24px color-mix(in srgb, var(--accent-strong) 15%, transparent);
  font-size: 19px;
  font-weight: 800;
}
.share-dialog-header h2 { margin: 0; font-size: 20px; line-height: 1.25; }
.share-dialog-header p { margin: 6px 0 0; color: var(--muted); font-size: 12px; line-height: 1.6; }
.share-link-field { display: grid; gap: 7px; color: var(--muted); font-size: 11px; font-weight: 750; }
.share-link-field input {
  width: 100%;
  height: 43px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 11px;
  outline: 0;
  background: color-mix(in srgb, var(--paper) 92%, var(--accent-soft));
  color: var(--ink);
  font: 11px ui-monospace, SFMono-Regular, Menlo, monospace;
}
.share-link-field input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent); }
.share-dialog-actions { display: flex; justify-content: flex-end; gap: 8px; }
.share-dialog-actions .compact-button { min-width: 92px; }
.share-dialog-actions .primary-button { border-color: var(--accent-strong); background: linear-gradient(125deg, var(--accent), var(--accent-strong)); color: #fff; }
.share-dialog-actions .primary-button:hover { border-color: var(--accent); color: #fff; filter: saturate(1.08); }

@media (max-width: 520px) {
  .new-markdown-dialog { width: calc(100vw - 20px); }
  .new-markdown-dialog form { gap: 15px; padding: 18px; }
  .new-markdown-header p { font-size: 11px; }
  .session-dialog { width: calc(100vw - 20px); }
  .session-dialog form { gap: 15px; padding: 18px; }
  .share-dialog { width: calc(100vw - 20px); }
  .share-dialog form { gap: 16px; padding: 19px; }
  .share-dialog-actions { flex-direction: column-reverse; }
  .share-dialog-actions .compact-button { width: 100%; }
}

/* Paged reading can advance across columns or down viewport-sized pages. */
.reader-shell[data-mode="paged"][data-page-direction="vertical"] .content:not(.adapter-content) {
  columns: auto;
  column-width: auto;
  column-count: auto;
  column-gap: 0;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior-y: contain;
  touch-action: pan-y;
}
.reader-shell[data-mode="paged"][data-page-direction="vertical"] .raw-source {
  overflow-y: auto;
  overscroll-behavior-y: contain;
  touch-action: pan-y;
}

/* Keep the explicit editor exit action visible without overpowering the toolbar. */
.editor-cancel-button {
  border-color: color-mix(in srgb, #c74764 48%, var(--line));
  background: color-mix(in srgb, #c74764 10%, var(--paper));
  color: #b83252;
  font-size: 18px;
  font-weight: 800;
}
.editor-cancel-button:hover,
.editor-cancel-button:focus-visible {
  border-color: #c74764;
  background: color-mix(in srgb, #c74764 18%, var(--paper));
  color: #9f2443;
}

/* Optional live Markdown comparison while editing. */
.editor-preview-control {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: var(--control-height, 34px);
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: var(--control-radius, 10px);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  color: var(--muted);
  font: 700 11px/1 var(--sans);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}
.editor-preview-control:hover,
.editor-preview-control:focus-within { border-color: var(--accent); color: var(--accent-strong); }
.editor-preview-control:has(input:checked) {
  border-color: color-mix(in srgb, var(--accent) 68%, var(--line));
  background: var(--accent-soft);
  color: var(--accent-strong);
}
.editor-preview-control input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.editor-preview-control[hidden] { display: none; }

body.editor-preview-enabled .reader-shell {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  height: 100vh;
  overflow: hidden;
}
body.editor-preview-enabled .document-stage {
  display: grid;
  grid-template-columns: minmax(0, var(--editor-source-size, 50%)) 1px minmax(0, 1fr);
  gap: 0;
  min-width: 0;
  min-height: 0;
  padding: 14px;
  overflow: hidden;
}
body.editor-preview-enabled .source-editor,
body.editor-preview-enabled .content {
  width: 100% !important;
  max-width: none !important;
  height: 100% !important;
  min-width: 0;
  min-height: 0 !important;
  margin: 0 !important;
  overflow: auto !important;
  columns: auto !important;
  column-width: auto !important;
  column-count: auto !important;
  column-gap: 0 !important;
  overscroll-behavior: contain;
  touch-action: pan-x pan-y;
}
body.editor-preview-enabled .source-editor {
  grid-column: 1;
  grid-row: 1;
  overflow-x: auto !important;
  overflow-y: hidden !important;
}
body.editor-preview-enabled .content { grid-column: 3; grid-row: 1; padding: clamp(24px, 3.4vw, 48px); }
body.editor-preview-enabled .source-editor::-webkit-scrollbar { width: 0; height: 10px; }
.editor-preview-resizer {
  grid-column: 2;
  grid-row: 1;
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1px;
  min-width: 1px;
  min-height: 0;
  border: 0;
  border-radius: 999px;
  outline: none;
  background: transparent;
  cursor: col-resize;
  touch-action: none;
}
.editor-preview-resizer::before {
  position: absolute;
  inset-block: 0;
  left: 50%;
  width: 11px;
  transform: translateX(-50%);
  content: "";
}
.editor-preview-resizer > span {
  width: 1px;
  height: 100%;
  min-height: 0;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 32%, var(--line));
  box-shadow: none;
  transition: width .14s ease, background .14s ease;
}
.editor-preview-resizer:hover > span,
.editor-preview-resizer:focus-visible > span,
body.editor-preview-resizing .editor-preview-resizer > span {
  width: 2px;
  background: var(--accent-strong);
  box-shadow: none;
}
.editor-preview-resizer[hidden] { display: none; }
.editor-preview-end {
  position: absolute;
  right: 30px;
  bottom: 30px;
  z-index: 4;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 36px;
  padding: 7px 13px;
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--line));
  border-radius: 999px;
  color: var(--ink);
  background: color-mix(in srgb, var(--paper) 92%, var(--accent) 8%);
  box-shadow: 0 8px 24px color-mix(in srgb, var(--ink) 14%, transparent);
  font: inherit;
  font-size: .82rem;
  font-weight: 700;
  cursor: pointer;
  backdrop-filter: blur(12px);
}
.editor-preview-end:hover { border-color: var(--accent-strong); transform: translateY(-1px); }
.editor-preview-end:focus-visible { outline: 2px solid var(--accent-strong); outline-offset: 2px; }
.editor-preview-end[hidden] { display: none; }
body.editor-preview-resizing { cursor: col-resize; user-select: none; }

.export-pdf-button {
  border-color: color-mix(in srgb, var(--accent) 34%, var(--line));
  background: color-mix(in srgb, var(--accent-soft) 46%, var(--paper));
}
.export-pdf-button:hover,
.export-pdf-button:focus-visible { background: var(--accent-soft); color: var(--accent-strong); }
.export-pdf-button:disabled { opacity: .58; cursor: wait; transform: none; }
.pdf-button-icon {
  display: inline-grid;
  place-items: center;
  width: 23px;
  height: 16px;
  border: 1px solid currentColor;
  border-radius: 4px;
  font: 800 7px/1 var(--sans);
  letter-spacing: .04em;
}

.share-document-button {
  position: relative;
  overflow: hidden;
  border-color: color-mix(in srgb, var(--accent) 54%, var(--line));
  background: linear-gradient(125deg, color-mix(in srgb, var(--accent-soft) 76%, var(--paper)), color-mix(in srgb, var(--accent) 20%, var(--paper)));
  color: var(--accent-strong);
  box-shadow: 0 7px 18px color-mix(in srgb, var(--accent-strong) 14%, transparent);
}
.share-document-button::before {
  position: absolute;
  inset: -60% auto -60% -34%;
  width: 24%;
  opacity: .55;
  background: rgba(255,255,255,.72);
  filter: blur(8px);
  transform: rotate(18deg);
  transition: left .55s ease;
  content: "";
  pointer-events: none;
}
.share-document-button:hover,
.share-document-button:focus-visible {
  border-color: var(--accent-strong);
  background: linear-gradient(125deg, color-mix(in srgb, var(--accent-soft) 90%, var(--paper)), color-mix(in srgb, var(--accent) 28%, var(--paper)));
  transform: translateY(-1px);
}
.share-document-button:hover::before,
.share-document-button:focus-visible::before { left: 118%; }
.share-document-button > * { position: relative; z-index: 1; }
.share-button-icon {
  display: inline-grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border: 1px solid color-mix(in srgb, currentColor 42%, transparent);
  border-radius: 50%;
  background: color-mix(in srgb, var(--paper) 50%, transparent);
  font-size: 10px;
}

.drop-overlay {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: grid;
  place-items: center;
  padding: 24px;
  background: color-mix(in srgb, var(--paper) 68%, transparent);
  backdrop-filter: blur(10px) saturate(1.12);
  pointer-events: none;
}
.drop-overlay[hidden] { display: none; }
.drop-overlay-card {
  width: min(520px, calc(100vw - 48px));
  min-height: 230px;
  padding: 38px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 2px dashed color-mix(in srgb, var(--accent) 74%, var(--line));
  border-radius: 30px;
  background: linear-gradient(145deg, color-mix(in srgb, var(--paper) 82%, var(--accent-soft)), color-mix(in srgb, var(--accent-soft) 64%, var(--paper)));
  box-shadow: 0 30px 90px color-mix(in srgb, var(--accent-strong) 24%, transparent), inset 0 1px rgba(255,255,255,.75);
  color: var(--ink);
  text-align: center;
  animation: drop-card-in .2s ease both;
}
.drop-overlay-card strong { font-family: var(--serif); font-size: clamp(1.35rem, 4vw, 2rem); line-height: 1.2; }
.drop-overlay-card > span:last-child { color: var(--muted); font-size: .82rem; font-weight: 650; }
.drop-overlay-icon {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  margin-bottom: 5px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: white;
  box-shadow: 0 12px 30px color-mix(in srgb, var(--accent-strong) 28%, transparent);
  font-size: 1.45rem;
}
@keyframes drop-card-in { from { opacity: 0; transform: translateY(8px) scale(.98); } }

@media (max-width: 820px) {
  .editor-preview-control { padding-inline: 8px; }
  body.editor-preview-enabled .document-stage {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: minmax(0, var(--editor-source-size, 50%)) 1px minmax(0, 1fr);
    gap: 0;
    padding: 8px;
  }
  body.editor-preview-enabled .source-editor { grid-column: 1; grid-row: 1; }
  body.editor-preview-enabled .editor-preview-resizer { grid-column: 1; grid-row: 2; width: auto; min-width: 0; min-height: 1px; height: 1px; cursor: row-resize; }
  body.editor-preview-enabled .editor-preview-resizer::before { inset-inline: 0; top: 50%; width: auto; height: 11px; transform: translateY(-50%); }
  body.editor-preview-enabled .editor-preview-resizer > span { width: 100%; min-width: 0; height: 1px; min-height: 0; }
  body.editor-preview-enabled .editor-preview-resizer:hover > span,
  body.editor-preview-enabled .editor-preview-resizer:focus-visible > span,
  body.editor-preview-resizing .editor-preview-resizer > span { width: 100%; height: 2px; }
  body.editor-preview-enabled .content { grid-column: 1; grid-row: 3; padding: 22px 18px; }
  body.editor-preview-enabled .editor-preview-end { right: 20px; bottom: 20px; }
  body.editor-preview-resizing { cursor: row-resize; }
}

@media print {
  @page {
    size: A4;
    margin: 14mm 15mm 16mm;

    /* Chromium paints page margins separately from the document canvas. */
    @top-left-corner { content: ""; background: var(--print-page); }
    @top-center { content: ""; background: var(--print-page); }
    @top-right-corner { content: ""; background: var(--print-page); }
    @left-middle { content: ""; background: var(--print-page); }
    /* Cover Chromium's subpixel gap between the canvas and right margin. */
    @right-middle { content: ""; background: var(--print-page); margin-left: -.3mm; }
    @bottom-left-corner { content: ""; background: var(--print-page); }
    @bottom-center { content: ""; background: var(--print-page); }
    @bottom-right-corner { content: ""; background: var(--print-page); }
  }

  :root,
  :root.dark {
    color-scheme: light;
    --print-page: color-mix(in srgb, var(--accent) 10%, #fff);
    --reader-paper: #fff;
    --reader-ink: #242126;
    --reader-muted: #68616a;
    --reader-line: rgba(36, 33, 38, .18);
    --reader-code: #f5f3f6;
  }

  html,
  body { min-width: 0; background: #fff !important; print-color-adjust: exact; -webkit-print-color-adjust: exact; }
  html { background: var(--print-page) !important; }
  .app { display: block !important; min-height: 0; }
  .sidebar,
  .sidebar-toggle,
  .reader-bar,
  .progress-track,
  .paged-navigation,
  .media-panel,
  .panel-scrim,
  .image-viewer,
  .toast,
  .toolbar-tooltip,
  .onboarding { display: none !important; }
  .reader-shell,
  .reader-shell[data-mode="horizontal"],
  .reader-shell[data-mode="paged"] { display: block; position: static; width: auto; height: auto; overflow: visible; }
  .document-stage { display: block !important; min-width: 0; padding: 0 !important; }
  .raw-source,
  .source-editor,
  .editor-preview-resizer,
  .editor-preview-end { display: none !important; }
  .content,
  body.sidebar-collapsed .content,
  .reader-shell[data-mode="horizontal"] .content,
  .reader-shell[data-mode="paged"] .content,
  body.editor-preview-enabled .content {
    display: block !important;
    grid-column: auto;
    width: auto;
    max-width: none;
    height: auto;
    min-height: 0;
    margin: 0;
    padding: 0;
    overflow: visible;
    columns: auto;
    border: 0;
    border-radius: 0;
    background: #fff;
    box-shadow: none;
  }
  .prose { color: var(--reader-ink); font-size: min(var(--reader-size), 18px); line-height: 1.72; }
  .prose h1,
  .prose h2,
  .prose h3,
  .prose h4,
  .prose h5,
  .prose h6 { break-after: avoid-page; }
  .prose pre,
  .prose blockquote,
  .prose table,
  .prose figure,
  .prose img,
  .prose .mermaid,
  .prose .katex-display { break-inside: avoid-page; }
  .prose pre { overflow: visible; white-space: pre-wrap; overflow-wrap: anywhere; }
  .prose .copy-code { display: none; }
  .prose img.document-image { max-height: 230mm; box-shadow: none; }
}

/* Candidate: soft wrapping changes visual layout only; saved Markdown stays exact. */
.source-editor { white-space: pre-wrap; overflow-wrap: anywhere; word-break: normal; }
.reader-shell[data-mode="vertical"] .raw-source,
.reader-shell[data-mode="paged"][data-page-direction="vertical"] .raw-source {
  white-space: pre-wrap; overflow-wrap: anywhere; word-break: normal;
}
.reader-shell[data-mode="vertical"] .content,
.reader-shell[data-mode="vertical"] .raw-source,
.reader-shell[data-mode="vertical"] .source-editor { min-width: 0; overflow-x: hidden; }
.reader-shell[data-mode="vertical"] .prose :is(p, li, blockquote, h1, h2, h3, h4, h5, h6) {
  max-width: 100%; overflow-wrap: anywhere; word-break: normal;
}
.prose pre, .table-wrap { max-width: 100%; min-width: 0; }
body.editor-preview-enabled .source-editor {
  white-space: pre-wrap; overflow-wrap: anywhere;
  overflow-x: hidden !important; overflow-y: auto !important;
}
body.editor-preview-enabled .source-editor::-webkit-scrollbar { width: 8px; }
body.editor-preview-enabled .content { overflow-x: hidden !important; }

.prose pre.large-document-preview { white-space: pre-wrap; overflow-wrap: anywhere; }

.pdf-options-dialog { width: min(440px, calc(100vw - 32px)); max-height: calc(100dvh - 32px); overflow: auto; padding: 24px; border: 1px solid var(--reader-line); border-radius: 20px; background: var(--reader-paper); color: var(--reader-ink); box-shadow: 0 24px 90px #0003; }
.pdf-options-dialog::backdrop { background: #1b172750; }
.pdf-options-dialog h2 { margin: 0 0 20px; font-size: 20px; }
.pdf-options-dialog label { display: grid; gap: 8px; font-size: 14px; font-weight: 600; }
.pdf-options-dialog input[type="text"] { box-sizing: border-box; width: 100%; min-width: 0; border: 1px solid var(--reader-line); border-radius: 10px; padding: 12px; background: var(--reader-paper); color: var(--reader-ink); font: inherit; }
.pdf-options-dialog p, .pdf-options-dialog details { color: var(--reader-muted); font-size: 12px; line-height: 1.7; }
.pdf-options-dialog details code { overflow-wrap: anywhere; }
.pdf-options-dialog footer { display: flex; justify-content: flex-end; gap: 10px; margin-top: 24px; }
.prose > .luma-page-break { display: flex; align-items: center; gap: 12px; margin: 2em 0; color: var(--reader-muted); font: 11px/1.5 sans-serif; }
.prose > .luma-page-break::before, .prose > .luma-page-break::after { content: ""; flex: 1; border-top: 1px dashed var(--reader-line); }
.reader-shell[data-mode="vertical"] .raw-source code,
.reader-shell[data-mode="paged"][data-page-direction="vertical"] .raw-source code { white-space: pre-wrap; overflow-wrap: anywhere; word-break: normal; }
body.editor-preview-enabled .prose :is(p, li, blockquote, h1, h2, h3, h4, h5, h6),
.reader-shell[data-mode="paged"][data-page-direction="vertical"] .prose :is(p, li, blockquote, h1, h2, h3, h4, h5, h6) { min-width: 0; overflow-wrap: anywhere; }
@media print {
  .pdf-options-dialog, .prose .luma-page-break { display: none !important; }
  .prose > .luma-start-page { break-before: page; page-break-before: always; padding-top: 5mm; }
}

.pdf-options-dialog .pdf-option-check { display: flex; align-items: center; gap: 10px; margin: 16px 0; cursor: pointer; }
.pdf-option-check input { width: 18px; height: 18px; margin: 0; accent-color: var(--accent-strong); }
.pdf-options-dialog input:disabled { opacity: .55; }
@media print {
  :root[data-pdf-frame="plain"] { --print-page: #fff; }
  :root[data-pdf-frame="plain"] body::before { display: none; }
}

/* Browser reading: two named actions, with secondary controls in Settings. */
#font-up, #font-down, .language-control, #reading-mode-control { display: none !important; }
#edit-document-icon, #appearance-theme-icon { display: none; }
.reader-actions #edit-document-label, .reader-actions #palette-toggle > [data-i18n="webSettings"] { display: inline; }
.reader-actions #edit-document, .reader-actions #palette-toggle { display: inline-flex; align-items: center; justify-content: center; width: auto; min-width: 64px; min-height: 38px; padding: 0 14px; font: 650 13px/1 var(--sans); }
.reader-actions #edit-document[hidden] { display: none; }
.appearance-menu-header [data-i18n="appearanceHint"] { display: none; }
.web-settings-actions { grid-template-columns: 1fr 1fr; }
.web-settings-actions .labeled-button { width: auto; justify-content: center; min-height: 38px; }
.web-settings-actions .labeled-button span:last-child { display: inline; }
@media (max-width: 820px) {
  body:not(.editing-document) .reader-bar { min-height: 60px; flex-wrap: nowrap; align-items: center; gap: 12px; }
  body:not(.editing-document) .file-heading { flex: 1 1 auto; min-width: 0; }
  body:not(.editing-document) .reader-actions { flex: 0 0 auto; width: auto; overflow: visible; }
  .reader-actions .appearance-menu { max-width: calc(100vw - 16px); }
}

@media (max-width: 820px) { body:not(.editing-document) .progress-track { top: 59px; } }

.reader-actions #share-document { width: 38px; min-width: 38px; height: 38px; padding: 0; }
#share-document .share-symbol { width: 21px; height: 21px; }

/* The reading action is a centered text label; save retains its existing treatment. */
.reader-actions #edit-document:not(.is-editing) { justify-content: center; gap: 0; }
#edit-document:not(.is-editing) #edit-document-icon { display: none; }
.reader-actions #edit-document:not(.is-editing) #edit-document-label { display: inline; }