/* =========================================================
   书虫 · 爱情与金钱 — 阅读/听力站
   设计：纸本阅读器物感 × 克制的现代排版
   ========================================================= */

/* ---------- 字体 ---------- */
:root {
  --serif-en: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua",
              Georgia, "Times New Roman", serif;
  --serif-zh: "Noto Serif SC", "Source Han Serif SC", "Source Han Serif CN",
              "Songti SC", STSong, "SimSun", serif;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --read-size: 19px;
  --read-lh: 1.85;

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: .22s;
}

/* ---------- 主题：纸白 ---------- */
[data-theme="paper"] {
  --paper: #f7f3ea;
  --paper-2: #f1ebdd;
  --surface: #fcfaf4;
  --surface-2: #f5efe2;
  --ink: #23211d;
  --ink-2: #5a554c;
  --ink-3: #8b8478;
  --rule: #e2dac9;
  --rule-2: #ece5d6;
  --accent: #2c5a49;
  --accent-2: #1e3f33;
  --accent-soft: #e6ede8;
  --gold: #a97c35;
  --gold-soft: #f0e4c9;
  --danger: #a8482f;
  --shadow-sm: 0 1px 2px rgba(35,33,29,.05);
  --shadow: 0 2px 6px rgba(35,33,29,.05), 0 16px 40px -20px rgba(35,33,29,.25);
  --shadow-lg: 0 4px 12px rgba(35,33,29,.06), 0 32px 70px -28px rgba(35,33,29,.35);
  --scrim: rgba(30,28,24,.38);
  --grain-opacity: .035;
  color-scheme: light;
}

/* ---------- 主题：米黄 ---------- */
[data-theme="sepia"] {
  --paper: #f3e7d1;
  --paper-2: #ecdcbf;
  --surface: #f8efdd;
  --surface-2: #efe0c6;
  --ink: #2b251b;
  --ink-2: #5f5544;
  --ink-3: #8d8069;
  --rule: #ddcbaa;
  --rule-2: #e8d9bd;
  --accent: #6b4b26;
  --accent-2: #51371a;
  --accent-soft: #ecdcbe;
  --gold: #96662a;
  --gold-soft: #ecd9b0;
  --danger: #a04a2c;
  --shadow-sm: 0 1px 2px rgba(60,45,20,.06);
  --shadow: 0 2px 6px rgba(60,45,20,.06), 0 16px 40px -20px rgba(60,45,20,.28);
  --shadow-lg: 0 4px 12px rgba(60,45,20,.07), 0 32px 70px -28px rgba(60,45,20,.38);
  --scrim: rgba(45,35,18,.4);
  --grain-opacity: .05;
  color-scheme: light;
}

/* ---------- 主题：暗夜 ---------- */
[data-theme="dark"] {
  --paper: #131517;
  --paper-2: #181b1e;
  --surface: #1b1f23;
  --surface-2: #22272c;
  --ink: #e8e2d5;
  --ink-2: #a8a294;
  --ink-3: #756f66;
  --rule: #2b3035;
  --rule-2: #23282d;
  --accent: #7fb29c;
  --accent-2: #a5cdbc;
  --accent-soft: #1e2b26;
  --gold: #d2aa66;
  --gold-soft: #2e2820;
  --danger: #d98e74;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
  --shadow: 0 2px 8px rgba(0,0,0,.3), 0 18px 44px -22px rgba(0,0,0,.8);
  --shadow-lg: 0 4px 14px rgba(0,0,0,.35), 0 36px 80px -30px rgba(0,0,0,.9);
  --scrim: rgba(0,0,0,.6);
  --grain-opacity: .06;
  color-scheme: dark;
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color .35s var(--ease), color .35s var(--ease);
}

body.no-scroll { overflow: hidden; }

/* 纸纹 */
.grain {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='160' height='160' filter='url(%23n)'/></svg>");
  mix-blend-mode: multiply;
}
[data-theme="dark"] .grain { mix-blend-mode: screen; }

[hidden] { display: none !important; }

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, select { font: inherit; color: inherit; }
h1, h2, h3, p { margin: 0; }
ol, ul { margin: 0; padding: 0; list-style: none; }
svg { display: block; }

::selection { background: var(--gold-soft); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  gap: 28px;
  height: 66px;
  padding: 0 clamp(16px, 4vw, 44px);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid var(--rule-2);
}

.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--paper);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.14);
}
.brand-mark svg { width: 19px; height: 19px; }
.brand-text { display: flex; align-items: baseline; gap: 8px; }
.brand-text strong {
  font-family: var(--serif-zh);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .12em;
}
.brand-text em {
  font-style: normal;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink-3);
}

.nav { display: flex; align-items: center; gap: 4px; margin-left: 8px; }
.nav a {
  position: relative;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--ink-2);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav a:hover { color: var(--ink); background: var(--surface-2); }
.nav a.active { color: var(--accent); background: var(--accent-soft); font-weight: 600; }

.bubble {
  display: inline-grid;
  place-items: center;
  min-width: 18px; height: 18px;
  padding: 0 5px;
  margin-left: 3px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--paper);
  font-size: 10.5px;
  font-weight: 700;
  vertical-align: 1px;
}

.top-actions { display: flex; align-items: center; gap: 2px; margin-left: auto; }

.icon-btn {
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  border-radius: 10px;
  color: var(--ink-2);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.icon-btn:hover { background: var(--surface-2); color: var(--ink); }
.icon-btn svg { width: 19px; height: 19px; }
.icon-btn.danger:hover { color: var(--danger); background: color-mix(in srgb, var(--danger) 10%, transparent); }

.i-moon { display: none; }
[data-theme="dark"] .i-sun { display: none; }
[data-theme="dark"] .i-moon { display: block; }

/* ---------- 布局 ---------- */
#app { min-height: calc(100vh - 66px); }
.view { display: none; }
.view.active { display: block; animation: viewIn .4s var(--ease); }
@keyframes viewIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* =========================================================
   首页
   ========================================================= */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  align-items: center;
  gap: clamp(32px, 6vw, 88px);
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(48px, 8vw, 96px) clamp(20px, 5vw, 48px) clamp(36px, 5vw, 56px);
}

.kicker {
  font-family: var(--sans);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--gold);
}

.display {
  margin-top: 18px;
  font-family: var(--serif-en);
  font-weight: 400;
  font-size: clamp(46px, 7vw, 84px);
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--ink);
}
.display-zh {
  margin-top: 14px;
  font-family: var(--serif-zh);
  font-size: clamp(21px, 2.6vw, 28px);
  letter-spacing: .34em;
  color: var(--ink-2);
}

.lede {
  max-width: 44ch;
  margin-top: 26px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 11px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--surface);
  font-size: 12px;
  color: var(--ink-2);
}
.chip .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.btn svg { width: 17px; height: 17px; transition: transform var(--dur) var(--ease); }
.btn:hover svg { transform: translateX(2px); }
.btn:active { transform: translateY(1px) scale(.99); }

.btn-primary {
  background: var(--accent);
  color: var(--paper);
  box-shadow: 0 1px 0 rgba(255,255,255,.12) inset, 0 8px 22px -10px var(--accent);
}
.btn-primary:hover { background: var(--accent-2); }

.btn-ghost {
  border: 1px solid var(--rule);
  background: var(--surface);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--ink-3); }

.btn-sm { height: 36px; padding: 0 15px; font-size: 12.5px; }

/* ---------- 书封 ---------- */
.hero-art {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 420px;
}

.book {
  position: relative;
  width: min(300px, 62vw);
  aspect-ratio: 2 / 3;
  transform: rotate(-3.2deg);
  filter: drop-shadow(0 30px 40px rgba(30,25,15,.28));
  transition: transform .6s var(--ease);
}
.hero-art:hover .book { transform: rotate(-1.6deg) translateY(-4px); }

.book-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 26px 24px 22px 30px;
  border-radius: 3px 12px 12px 3px;
  background:
    radial-gradient(120% 90% at 82% 8%, rgba(255,255,255,.10), transparent 55%),
    linear-gradient(158deg, #2e5245 0%, #1d3a30 48%, #142a23 100%);
  color: #f2e8d2;
  overflow: hidden;
}
.book-face::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(90deg, rgba(255,255,255,.02) 0 1px, transparent 1px 3px);
  opacity: .5;
  pointer-events: none;
}
.book-spine {
  position: absolute;
  top: 0; bottom: 0; left: 0;
  width: 14px;
  border-radius: 3px 0 0 3px;
  background: linear-gradient(90deg, rgba(0,0,0,.42), rgba(0,0,0,.06) 60%, rgba(255,255,255,.06));
}

.book-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.book-series {
  font-size: 8px;
  letter-spacing: .16em;
  text-transform: uppercase;
  opacity: .72;
}
.book-level {
  padding: 3px 7px;
  border: 1px solid rgba(242,232,210,.4);
  border-radius: 3px;
  font-size: 8px;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.book-mid { display: flex; flex-direction: column; gap: 12px; }
.book-title {
  font-family: var(--serif-en);
  font-size: clamp(30px, 3.6vw, 40px);
  font-style: italic;
  line-height: 1.05;
  letter-spacing: -.01em;
}
.book-rule {
  width: 44px; height: 1px;
  background: rgba(242,232,210,.45);
}
.book-author {
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  opacity: .8;
}

.book-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 9px;
  letter-spacing: .14em;
  opacity: .62;
}
.book-bottom svg { width: 22px; height: 22px; }

.art-caption {
  margin-top: 34px;
  font-family: var(--serif-zh);
  font-size: 11px;
  letter-spacing: .42em;
  color: var(--ink-3);
}

/* ---------- 统计 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 48px);
}
.stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 26px 28px;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.stat + .stat { border-left: 1px solid var(--rule-2); }
.stat-num {
  font-family: var(--serif-en);
  font-size: 34px;
  line-height: 1;
  letter-spacing: -.01em;
  font-variant-numeric: tabular-nums;
}
.stat-unit { font-size: 15px; color: var(--ink-3); margin-left: 2px; }
.stat-label {
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--ink-3);
}

/* ---------- 目录 ---------- */
.toc {
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(48px, 7vw, 88px) clamp(20px, 5vw, 48px) 120px;
}
.toc-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--ink);
}
.toc-head h2 {
  font-family: var(--serif-zh);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: .1em;
}
.toc-head .zh {
  margin-left: 12px;
  font-family: var(--serif-en);
  font-size: 13px;
  font-style: italic;
  font-weight: 400;
  letter-spacing: .04em;
  color: var(--ink-3);
}
.toc-hint { font-size: 12px; color: var(--ink-3); }

.toc-list { margin-top: 4px; }

.toc-item {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr) auto 140px;
  align-items: center;
  gap: 18px;
  width: 100%;
  padding: 22px 8px 22px 4px;
  text-align: left;
  border-bottom: 1px solid var(--rule-2);
  transition: background var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}
.toc-item:hover { background: var(--surface); padding-left: 14px; }

.toc-num {
  font-family: var(--serif-en);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  color: var(--ink-3);
  letter-spacing: .06em;
}
.toc-main { min-width: 0; }
.toc-title {
  display: block;
  font-family: var(--serif-en);
  font-size: 20px;
  letter-spacing: -.01em;
}
.toc-sub {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  color: var(--ink-3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.toc-side {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}
.toc-progress {
  position: relative;
  width: 140px;
  height: 3px;
  border-radius: 2px;
  background: var(--rule);
  overflow: hidden;
}
.toc-progress i {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  background: var(--accent);
  border-radius: 2px;
  transition: width .5s var(--ease);
}
.toc-state {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--ink-3);
}
.toc-item.done .toc-state { color: var(--accent); }
.toc-item.active .toc-title { color: var(--accent); }

/* =========================================================
   阅读页
   ========================================================= */
.reader {
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr) 224px;
  gap: clamp(28px, 4vw, 56px);
  max-width: 1280px;
  margin: 0 auto;
  padding: 34px clamp(20px, 4vw, 48px) 150px;
  align-items: start;
}

.rail { position: sticky; top: 96px; }
.rail-left { padding-top: 4px; }
.rail-title {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.rail-nav { margin-top: 14px; display: flex; flex-direction: column; }
.rail-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13px;
  color: var(--ink-2);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.rail-link:hover { background: var(--surface); color: var(--ink); }
.rail-link.active { color: var(--accent); background: var(--accent-soft); font-weight: 600; }
.rail-link .n {
  font-family: var(--serif-en);
  font-size: 11px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}
.rail-link.done .n { color: var(--accent); }

.rail-right { display: flex; flex-direction: column; gap: 26px; }
.rail-block { display: flex; flex-direction: column; gap: 10px; }
.rail-val {
  float: right;
  font-size: 10.5px;
  letter-spacing: 0;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}

.seg {
  display: flex;
  padding: 3px;
  border: 1px solid var(--rule);
  border-radius: 9px;
  background: var(--surface-2);
}
.seg button {
  flex: 1;
  padding: 6px 4px;
  border-radius: 6px;
  font-size: 11.5px;
  color: var(--ink-3);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.seg button:hover { color: var(--ink); }
.seg button.active {
  background: var(--surface);
  color: var(--ink);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}
.seg-wide button { padding: 8px 4px; font-size: 12px; }

.range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 3px;
  border-radius: 2px;
  background: var(--rule);
  outline: none;
  cursor: pointer;
}
.range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 15px; height: 15px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--paper);
  box-shadow: 0 1px 4px rgba(0,0,0,.2);
  cursor: grab;
}
.range::-moz-range-thumb {
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--paper);
  cursor: grab;
}

.mini-vocab { display: flex; flex-direction: column; gap: 2px; }
.mini-word {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 6px;
  font-size: 12.5px;
  color: var(--ink-2);
}
.mini-word:hover { background: var(--surface); color: var(--ink); }
.mini-word span:last-child {
  font-size: 11px;
  color: var(--ink-3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 92px;
}
.mini-empty { font-size: 12px; color: var(--ink-3); padding: 4px 0; line-height: 1.7; }

/* ---------- 文章 ---------- */
.article { max-width: 700px; width: 100%; margin: 0 auto; min-width: 0; }

.article-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 26px;
}
.backlink {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  color: var(--ink-3);
  transition: color var(--dur) var(--ease);
}
.backlink:hover { color: var(--ink); }
.backlink svg { width: 16px; height: 16px; }

.article-tools { display: flex; align-items: center; gap: 6px; }
.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 34px;
  padding: 0 13px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--surface);
  font-size: 12.5px;
  color: var(--ink-2);
  transition: all var(--dur) var(--ease);
}
.tool-btn:hover { border-color: var(--ink-3); color: var(--ink); }
.tool-btn svg { width: 16px; height: 16px; }
.tool-btn.speaking { background: var(--accent); color: var(--paper); border-color: var(--accent); }
.only-mobile { display: none; }

.art-head { padding-bottom: 34px; border-bottom: 1px solid var(--ink); }
.art-head h1 {
  margin-top: 12px;
  font-family: var(--serif-en);
  font-size: clamp(34px, 5vw, 46px);
  font-weight: 400;
  letter-spacing: -.02em;
  line-height: 1.1;
}
.art-meta {
  margin-top: 12px;
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: .04em;
  font-variant-numeric: tabular-nums;
}

.pairs { padding-top: 26px; }

.pair {
  position: relative;
  padding: 16px 18px 17px 20px;
  margin: 0 -18px 0 -20px;
  border-left: 2px solid transparent;
  border-radius: 0 10px 10px 0;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.pair:hover { border-left-color: var(--rule); }
.pair.active { border-left-color: var(--accent); background: var(--surface); }
.pair.active .en { color: var(--ink); }

.pair .en {
  display: block;
  font-family: var(--serif-en);
  font-size: var(--read-size);
  line-height: var(--read-lh);
  color: var(--ink);
  letter-spacing: 0;
  cursor: text;
}
.pair .zh {
  display: block;
  margin-top: .5em;
  font-family: var(--serif-zh);
  font-size: calc(var(--read-size) * .8);
  line-height: 1.9;
  color: var(--ink-2);
  letter-spacing: .01em;
}

[data-mode="en"] .pair .zh { display: none; }
[data-mode="zh"] .pair .en { display: none; }
[data-mode="zh"] .pair .zh { margin-top: 0; font-size: var(--read-size); }

/* 首段首字母 */
.pair.first .en::first-letter {
  float: left;
  font-size: 3.5em;
  line-height: .82;
  padding: .06em .1em 0 0;
  font-weight: 400;
  color: var(--accent);
}

/* 被朗读/定位的句子 */
.speaking-sent { background: var(--gold-soft); border-radius: 3px; box-shadow: 0 0 0 3px var(--gold-soft); }

.art-foot {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 54px;
  padding-top: 30px;
  border-top: 1px solid var(--rule);
}

/* 阅读页移动端工具条 */
.reader-tools-mobile { display: none; }

/* =========================================================
   生词本
   ========================================================= */
.vocab-page {
  max-width: 1080px;
  margin: 0 auto;
  padding: clamp(40px, 6vw, 72px) clamp(20px, 5vw, 48px) 140px;
}
.page-head { max-width: 640px; }
.page-head h1 {
  margin-top: 14px;
  font-family: var(--serif-zh);
  font-size: clamp(32px, 4.4vw, 44px);
  font-weight: 600;
  letter-spacing: .06em;
}
.page-head .zh {
  display: block;
  margin-top: 8px;
  font-family: var(--serif-en);
  font-size: 14px;
  font-style: italic;
  font-weight: 400;
  letter-spacing: .04em;
  color: var(--ink-3);
}
.page-sub {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
}

.vocab-toolbar {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 34px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--rule);
}
.search {
  display: flex;
  align-items: center;
  gap: 9px;
  flex: 1;
  max-width: 380px;
  height: 40px;
  padding: 0 14px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--surface);
  transition: border-color var(--dur) var(--ease);
}
.search:focus-within { border-color: var(--accent); }
.search svg { width: 16px; height: 16px; color: var(--ink-3); flex-shrink: 0; }
.search input {
  width: 100%;
  border: 0;
  background: none;
  outline: none;
  font-size: 13.5px;
}
.search input::placeholder { color: var(--ink-3); }

.toolbar-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }

.vocab-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.vocab-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 20px 22px;
  border: 1px solid var(--rule-2);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.vocab-card:hover { border-color: var(--rule); transform: translateY(-1px); box-shadow: var(--shadow-sm); }

.vc-top { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.vc-word {
  font-family: var(--serif-en);
  font-size: 25px;
  letter-spacing: -.01em;
  line-height: 1.15;
}
.vc-phon { font-size: 12px; color: var(--ink-3); font-family: var(--mono); }
.vc-def { font-size: 13.5px; color: var(--ink); line-height: 1.7; }
.vc-src {
  font-family: var(--serif-en);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-3);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.vc-src b { color: var(--ink-2); font-weight: 600; }
.vc-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 4px;
  padding-top: 10px;
  border-top: 1px dashed var(--rule-2);
}
.vc-chapter {
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.vc-actions { display: flex; align-items: center; gap: 2px; }
.vc-actions .icon-btn { width: 30px; height: 30px; }
.vc-actions .icon-btn svg { width: 15px; height: 15px; }
.vc-known { color: var(--accent); }
.vocab-card.learned { opacity: .62; }
.vocab-card.learned .vc-word { text-decoration: line-through; text-decoration-thickness: 1px; text-decoration-color: var(--ink-3); }

.empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  padding: 90px 20px;
  text-align: center;
  color: var(--ink-3);
  font-size: 14px;
  line-height: 1.9;
}
.empty-mark {
  display: grid;
  place-items: center;
  width: 64px; height: 64px;
  border: 1px solid var(--rule);
  border-radius: 50%;
  color: var(--ink-3);
}
.empty-mark svg { width: 28px; height: 28px; }

/* =========================================================
   播放器
   ========================================================= */
.player {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 70;
  display: grid;
  grid-template-columns: minmax(150px, 260px) minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(14px, 3vw, 34px);
  padding: 12px clamp(16px, 4vw, 40px) calc(12px + env(safe-area-inset-bottom));
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  backdrop-filter: blur(18px) saturate(1.3);
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
  border-top: 1px solid var(--rule);
  box-shadow: 0 -10px 40px -22px rgba(0,0,0,.3);
  animation: playerIn .35s var(--ease);
}
@keyframes playerIn { from { transform: translateY(100%); } to { transform: none; } }

.pl-info { display: flex; align-items: center; gap: 11px; min-width: 0; }
.pl-badge {
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  flex-shrink: 0;
  border-radius: 10px;
  background: var(--accent);
  color: var(--paper);
}
.pl-badge svg { width: 19px; height: 19px; }
.pl-text { display: flex; flex-direction: column; min-width: 0; }
.pl-title {
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pl-sub {
  font-size: 11px;
  color: var(--ink-3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-variant-numeric: tabular-nums;
}

.pl-main { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.pl-controls { display: flex; align-items: center; justify-content: center; gap: 4px; }

.pl-btn {
  display: grid;
  place-items: center;
  width: 32px; height: 32px;
  border-radius: 50%;
  color: var(--ink-2);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.pl-btn:hover { background: var(--surface-2); color: var(--ink); }
.pl-btn svg { width: 17px; height: 17px; }

.pl-play {
  display: grid;
  place-items: center;
  width: 42px; height: 42px;
  margin: 0 6px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.pl-play:hover { transform: scale(1.05); }
.pl-play svg { width: 18px; height: 18px; }
.pl-play .i-pause { display: none; }
.player.playing .pl-play .i-play { display: none; }
.player.playing .pl-play .i-pause { display: block; }

.pl-track { display: flex; align-items: center; gap: 10px; position: relative; }

/* 无音频 / 朗读进度提示 */
.pl-status {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 3px 6px 3px 12px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  font-size: 11px;
  color: var(--ink-2);
  white-space: nowrap;
  max-width: calc(100% - 6px);
}
.pl-status-btn {
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--paper);
  font-size: 10.5px;
  font-weight: 600;
}
.pl-status-btn:hover { background: var(--accent-2); }
.player.tts .pl-status { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, var(--rule)); }
.player.tts .pl-status-btn { display: none; }
.player.tts .track { opacity: 1 !important; pointer-events: none; }
.player.no-audio .pl-time { visibility: hidden; }
.player.tts .pl-time { visibility: hidden; }
@media (max-width: 720px) {
  .pl-status { font-size: 10px; padding: 2px 4px 2px 9px; gap: 6px; }
  .pl-status-btn { font-size: 10px; padding: 2px 8px; }
}
.pl-time {
  width: 38px;
  flex-shrink: 0;
  font-size: 10.5px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
  font-family: var(--mono);
}
.pl-time:first-child { text-align: right; }

.track {
  position: relative;
  flex: 1;
  height: 20px;
  cursor: pointer;
  touch-action: none;
}
.track::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 50%;
  height: 3px;
  margin-top: -1.5px;
  border-radius: 2px;
  background: var(--rule);
}
.track-buffer, .track-fill {
  position: absolute;
  left: 0; top: 50%;
  height: 3px;
  margin-top: -1.5px;
  border-radius: 2px;
  pointer-events: none;
}
.track-buffer { width: 0; background: var(--rule-2); }
.track-fill { width: 0; background: var(--accent); }
.track-knob {
  position: absolute;
  top: 50%; left: 0;
  width: 11px; height: 11px;
  margin: -5.5px 0 0 -5.5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 1px 4px rgba(0,0,0,.25);
  opacity: 0;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  pointer-events: none;
}
.track:hover .track-knob, .track.dragging .track-knob { opacity: 1; }
.track:hover .track-knob { transform: scale(1.15); }

.pl-right { display: flex; align-items: center; gap: 4px; }
.pl-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  height: 30px;
  min-width: 34px;
  padding: 0 9px;
  border-radius: 8px;
  font-size: 11.5px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--ink-2);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.pl-chip:hover { background: var(--surface-2); color: var(--ink); }
.pl-chip.on { background: var(--accent-soft); color: var(--accent); }
.pl-chip svg { width: 16px; height: 16px; }

/* 播放器：无音频状态（播放键保留，用作朗读开关） */
.player.no-audio .pl-controls .pl-btn,
.player.no-audio .track { opacity: .35; pointer-events: none; }
.player.no-audio .pl-sub { color: var(--gold); }

/* =========================================================
   设置抽屉
   ========================================================= */
.scrim {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: var(--scrim);
  backdrop-filter: blur(2px);
  animation: fadeIn .25s var(--ease);
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.sheet {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  z-index: 90;
  width: min(420px, 92vw);
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border-left: 1px solid var(--rule);
  box-shadow: var(--shadow-lg);
  transform: translateX(102%);
  transition: transform .34s var(--ease);
  visibility: hidden;
}
.sheet.open { transform: none; visibility: visible; }

.sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 22px 18px 26px;
  border-bottom: 1px solid var(--rule-2);
}
.sheet-head h2 {
  font-family: var(--serif-zh);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .12em;
}
.sheet-body {
  flex: 1;
  overflow-y: auto;
  padding: 6px 26px 40px;
  scrollbar-width: thin;
}

.field { padding: 20px 0; border-bottom: 1px solid var(--rule-2); }
.field:last-of-type { border-bottom: 0; }
.field-label {
  display: block;
  margin-bottom: 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--ink-2);
}
.field-val { float: right; font-weight: 400; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.field-note {
  margin: -4px 0 12px;
  font-size: 12px;
  line-height: 1.75;
  color: var(--ink-3);
}
.field-note code {
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--surface-2);
  font-family: var(--mono);
  font-size: 11px;
}

.theme-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.theme-swatch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  padding: 9px 6px;
  border: 1px solid var(--rule);
  border-radius: 10px;
  font-size: 11.5px;
  color: var(--ink-2);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.theme-swatch:hover { background: var(--surface); }
.theme-swatch.active { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.sw {
  width: 100%;
  height: 34px;
  border-radius: 6px;
  border: 1px solid rgba(0,0,0,.08);
}
.sw-paper { background: linear-gradient(160deg, #fcfaf4, #eee7d8); }
.sw-sepia { background: linear-gradient(160deg, #f8efdd, #e3cfa9); }
.sw-dark { background: linear-gradient(160deg, #2a2f34, #101214); }

.switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: var(--ink-2);
  cursor: pointer;
}
.switch {
  appearance: none;
  width: 40px; height: 23px;
  border-radius: 999px;
  background: var(--rule);
  position: relative;
  cursor: pointer;
  transition: background var(--dur) var(--ease);
  flex-shrink: 0;
}
.switch::after {
  content: "";
  position: absolute;
  top: 3px; left: 3px;
  width: 17px; height: 17px;
  border-radius: 50%;
  background: var(--surface);
  box-shadow: 0 1px 3px rgba(0,0,0,.25);
  transition: transform var(--dur) var(--ease);
}
.switch:checked { background: var(--accent); }
.switch:checked::after { transform: translateX(17px); }

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 22px 16px;
  border: 1px dashed var(--rule);
  border-radius: 12px;
  background: var(--surface);
  font-size: 12.5px;
  color: var(--ink-3);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
  text-align: center;
}
.dropzone.hover { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.dropzone svg { width: 22px; height: 22px; }
.dropzone .link { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; cursor: pointer; }

.audio-list { display: flex; flex-direction: column; gap: 2px; margin-top: 10px; }
.audio-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 7px 9px;
  border-radius: 7px;
  font-size: 12px;
  color: var(--ink-2);
}
.audio-item:hover { background: var(--surface); }
.audio-item .ok { color: var(--accent); font-size: 11px; }
.audio-item .audio-file {
  display: block;
  margin-top: 2px;
  color: var(--ink-3);
  font-size: 11px;
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.audio-item button { color: var(--ink-3); font-size: 11px; }
.audio-item button:hover { color: var(--danger); }

.row-actions { display: flex; flex-wrap: wrap; gap: 8px; }

.colophon {
  margin-top: 22px;
  padding: 16px;
  border-radius: 10px;
  background: var(--surface-2);
  font-size: 11.5px;
  line-height: 1.8;
  color: var(--ink-3);
}

/* =========================================================
   单词卡
   ========================================================= */
.wordpop {
  position: fixed;
  z-index: 95;
  width: 320px;
  max-width: calc(100vw - 24px);
  padding: 16px 18px 14px;
  border: 1px solid var(--rule);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  animation: popIn .18s var(--ease);
}
@keyframes popIn { from { opacity: 0; transform: translateY(5px) scale(.98); } to { opacity: 1; transform: none; } }

.wordpop-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.wp-title { min-width: 0; }
.wp-head-actions { display: flex; align-items: center; gap: 2px; margin: -4px -6px 0 0; }
.wordpop-head .icon-btn { width: 28px; height: 28px; }
.wp-head-actions .icon-btn:hover { color: var(--gold); }
.wp-word {
  font-family: var(--serif-en);
  font-size: 26px;
  line-height: 1.15;
  letter-spacing: -.01em;
}
.wp-phon { margin-top: 3px; font-family: var(--mono); font-size: 11.5px; color: var(--ink-3); }
.wp-pos {
  margin-top: 10px;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gold);
}
.wp-def { margin-top: 5px; font-size: 13.5px; line-height: 1.7; color: var(--ink); }
.wp-ctx {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--rule);
  font-family: var(--serif-en);
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-3);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.wp-ctx:empty { display: none; }
.wp-actions { display: flex; gap: 8px; margin-top: 14px; }

/* =========================================================
   复习
   ========================================================= */
.review {
  position: fixed;
  inset: 0;
  z-index: 110;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 26px;
  padding: 24px;
  background: var(--paper);
  animation: fadeIn .25s var(--ease);
}
.review-head {
  position: absolute;
  top: 20px; left: 24px; right: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

.flash { width: min(460px, 92vw); height: min(320px, 52vh); perspective: 1400px; cursor: pointer; }
.flash-inner {
  position: relative;
  width: 100%; height: 100%;
  transform-style: preserve-3d;
  transition: transform .55s var(--ease);
}
.flash.flipped .flash-inner { transform: rotateY(180deg); }
.flash-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 28px;
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  text-align: center;
}
.flash-front { background: linear-gradient(160deg, var(--surface), var(--surface-2)); }
.flash-back { transform: rotateY(180deg); gap: 8px; }
.flash-word {
  font-family: var(--serif-en);
  font-size: clamp(38px, 7vw, 54px);
  line-height: 1.1;
  letter-spacing: -.02em;
}
.flash-word.small { font-size: 30px; color: var(--ink-2); }
.flash-hint { position: absolute; bottom: 22px; font-size: 11px; color: var(--ink-3); letter-spacing: .1em; }
.flash-phon { font-family: var(--mono); font-size: 12px; color: var(--ink-3); }
.flash-def { margin-top: 4px; font-size: 16px; line-height: 1.7; color: var(--ink); }
.flash-src {
  margin-top: 10px;
  font-family: var(--serif-en);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--ink-3);
  max-width: 34ch;
}
.review-actions { display: flex; gap: 12px; }
.review-done { font-size: 14px; color: var(--ink-2); }

/* =========================================================
   弹窗 / toast
   ========================================================= */
.mini-dialog {
  border: 1px solid var(--rule);
  border-radius: 16px;
  padding: 22px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-lg);
  width: min(340px, 90vw);
}
.mini-dialog::backdrop { background: var(--scrim); backdrop-filter: blur(2px); }
.md-word { font-family: var(--serif-en); font-size: 24px; margin-bottom: 14px; }
.text-input {
  width: 100%;
  height: 40px;
  padding: 0 12px;
  margin-top: 6px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--paper);
  outline: none;
  font-size: 13.5px;
}
.text-input:focus { border-color: var(--accent); }
.md-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 104px;
  z-index: 130;
  transform: translate(-50%, 14px);
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: 12.5px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s var(--ease), transform .25s var(--ease);
  white-space: nowrap;
  max-width: calc(100vw - 32px);
  overflow: hidden;
  text-overflow: ellipsis;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1180px) {
  .reader { grid-template-columns: 210px minmax(0, 1fr); }
  .rail-right { display: none; }
  .article { max-width: 680px; }
  .only-mobile { display: inline-flex; }
}

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 40px; padding-top: 40px; }
  .hero-art { order: -1; min-height: 300px; }
  .book { width: min(220px, 46vw); }
  .lede { max-width: none; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 20px 22px; }
  .stat:nth-child(3) { border-left: 0; }
  .stat:nth-child(n+3) { border-top: 0; }
  .toc-item { grid-template-columns: 42px minmax(0, 1fr) auto; gap: 12px; }
  .toc-progress { display: none; }
  .toc-side { gap: 8px; }
  .vocab-grid { grid-template-columns: 1fr; }
  .reader { grid-template-columns: minmax(0, 1fr); padding-top: 18px; }
  .rail-left { display: none; }
  .article { max-width: 100%; }
  .pair { margin-left: -14px; padding-left: 14px; }
}

@media (max-width: 720px) {
  .topbar { gap: 10px; height: 60px; padding: 0 14px; }
  .brand-text em { display: none; }
  .nav a { padding: 6px 9px; font-size: 13px; }
  .nav { margin-left: 0; }
  #app { min-height: calc(100vh - 60px); }

  .hero { padding: 26px 18px 30px; }
  .display { font-size: clamp(42px, 13vw, 60px); }
  .display-zh { letter-spacing: .26em; font-size: 19px; }
  .lede { font-size: 14.5px; margin-top: 20px; }
  .hero-actions .btn { flex: 1; }
  .art-caption { display: none; }

  .stats { padding: 0 18px; }
  .toc { padding: 46px 18px 130px; }
  .toc-head { align-items: flex-start; flex-direction: column; gap: 6px; }
  .toc-item { padding: 18px 4px; }
  .toc-title { font-size: 18px; }
  .toc-state { display: none; }

  .article-bar { padding-bottom: 20px; }
  .art-head { padding-bottom: 26px; }
  .pairs { padding-top: 18px; }

  .vocab-page { padding: 34px 18px 150px; }
  .vocab-toolbar { flex-direction: column; align-items: stretch; gap: 10px; }
  .search { max-width: none; }
  .toolbar-actions { margin-left: 0; justify-content: flex-end; }
  .vocab-card { padding: 18px; }

  .player {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas: "info right" "main main";
    gap: 8px 12px;
    padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  }
  .pl-info { grid-area: info; }
  .pl-main { grid-area: main; }
  .pl-right { grid-area: right; }
  .pl-badge { width: 32px; height: 32px; border-radius: 8px; }
  .pl-badge svg { width: 16px; height: 16px; }
  .pl-play { width: 38px; height: 38px; }
  .pl-btn { width: 30px; height: 30px; }
  .pl-time { width: 30px; font-size: 10px; }
  #sleepBtn { display: none; }
  .toast { bottom: 132px; }

  .sheet { width: 100%; max-width: none; }
  .sheet-head { padding: 16px 18px 14px 20px; }
  .sheet-body { padding: 4px 20px 40px; }
}

@media (max-width: 420px) {
  .brand-text strong { font-size: 15px; }
  .pl-chip { padding: 0 6px; font-size: 10.5px; }
  .pl-right { gap: 0; }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

/* 已读状态按钮 */
.mark-done, #markDoneBtn.done-state { color: var(--accent); border-color: var(--accent); }

/* ---------- 无课程数据时的在线外壳提示 ---------- */
.shell-notice {
  max-width: 560px;
  margin: 18vh auto 0;
  padding: 0 24px;
  text-align: center;
  color: var(--ink-2);
}
.shell-notice h1 {
  font-family: var(--serif-en);
  font-size: clamp(34px, 6vw, 52px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--ink);
}
.shell-notice p { margin-top: 18px; font-size: 14px; line-height: 1.8; }
.shell-notice .hint { font-size: 12.5px; color: var(--ink-3); }
.shell-notice code {
  font-family: var(--mono);
  font-size: 12px;
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--surface-2);
}