/* ChunkIt tablet · landscape — tokens from the app's src/styles/flashcardStudy.ts */
:root {
  --bg: oklch(97.4% 0.003 220);
  --surface: oklch(100% 0 0);
  --fg: oklch(25.4% 0.028 258);
  --muted: oklch(52% 0.026 242);
  --border: oklch(92.8% 0.008 237);
  --accent: oklch(62.4% 0.101 180);
  --accent-strong: oklch(50% 0.088 181);
  --accent-soft: color-mix(in oklch, var(--accent) 14%, var(--surface));
  --side-bg: color-mix(in oklch, var(--fg) 2.5%, var(--bg));
  --mint: oklch(95.9% 0.015 176);
  --sky: oklch(95.3% 0.013 241);
  --butter: oklch(95.4% 0.027 95);
  --lilac: oklch(94.5% 0.017 308);
  --peach: oklch(94.7% 0.016 59);
  --coral: oklch(94.5% 0.017 27);
  --danger: oklch(63.7% 0.208 25);
  --ok: oklch(69.6% 0.149 162);
  --ok-strong: oklch(52% 0.12 162);
  --warn: oklch(76.9% 0.165 70);
  --gold: oklch(72.8% 0.138 90);
  --silver: oklch(75.3% 0.015 248);
  --font-body: Inter, "SF Pro Text", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-zh: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, monospace;
  --side: 272px;
  --status: 24px;
  --r-card: 18px;
  --r-btn: 14px;
  --r-nav: 10px;
  --gap: 20px;
  --pad: 36px;
  --shadow-1: 0 1px 2px color-mix(in oklch, var(--fg) 6%, transparent);
  --shadow-2: 0 18px 40px -22px color-mix(in oklch, var(--fg) 30%, transparent);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}
body.android {
  --side: 288px;
  --status: 28px;
  --r-card: 16px;
  --r-btn: 999px;
  --r-nav: 999px;
  --font-body: Roboto, "Google Sans", Inter, system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg); color: var(--fg);
  font-family: var(--font-body); font-size: 15px; line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
  display: flex; flex-direction: column;
}
button, input { font: inherit; color: inherit; }
button { cursor: pointer; border: 0; background: none; padding: 0; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img { display: block; max-width: 100%; }
.zh { font-family: var(--font-zh); }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
.accent { color: var(--accent-strong); }
.hidden, [hidden] { display: none !important; }
:focus-visible { outline: 3px solid color-mix(in oklch, var(--accent) 45%, transparent); outline-offset: 2px; }

/* Status bar (drawn by tablet.js) */
.statusbar {
  flex: 0 0 var(--status);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px 0 28px;
  font-size: 13px; font-weight: 600; color: var(--fg);
  pointer-events: none; position: relative; z-index: 40;
}
.statusbar .icons { display: inline-flex; align-items: center; gap: 6px; }
.statusbar svg { height: 11px; fill: currentColor; display: block; }
body.android .statusbar { font-weight: 500; font-size: 13px; padding: 0 22px; }

/* Shell */
.shell { flex: 1; min-height: 0; display: grid; grid-template-columns: var(--side) 1fr; }
.shell.focus { grid-template-columns: 1fr; }
.pane { min-width: 0; min-height: 0; overflow-y: auto; scrollbar-width: none; position: relative; }
.pane::-webkit-scrollbar { display: none; }
.pane-inner { padding: 14px var(--pad) 40px; max-width: 1040px; }

/* Sidebar */
.sidebar {
  min-height: 0; overflow-y: auto; scrollbar-width: none;
  background: var(--side-bg);
  border-right: 1px solid var(--border);
  padding: 10px 14px 16px;
  display: flex; flex-direction: column; gap: 6px;
}
.sidebar::-webkit-scrollbar { display: none; }
.side-brand { display: flex; align-items: center; gap: 11px; padding: 6px 8px 14px; }
.side-brand img { width: 38px; height: 38px; border-radius: 22.37%; box-shadow: 0 0 0 1px var(--border); }
.side-brand b { display: block; font-family: var(--font-zh); font-size: 16px; font-weight: 750; letter-spacing: 0.02em; line-height: 1.2; }
.side-brand span { display: block; font-size: 12px; color: var(--muted); }
.side-quick {
  display: flex; align-items: center; gap: 12px;
  min-height: 56px; padding: 10px 14px; margin-bottom: 8px;
  border-radius: 14px;
  background: var(--accent-strong); color: var(--surface);
  box-shadow: 0 12px 24px -12px color-mix(in oklch, var(--accent-strong) 70%, transparent), inset 0 1px 0 color-mix(in oklch, white 22%, transparent);
  text-align: left;
  transition: background 0.15s ease, transform 0.08s ease;
}
.side-quick:hover { background: color-mix(in oklch, var(--accent-strong) 88%, black); }
.side-quick:active { transform: scale(0.99); }
.side-quick .play { width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center; background: color-mix(in oklch, white 18%, transparent); }
.side-quick .play svg { width: 13px; height: 13px; fill: currentColor; }
.side-quick b { display: block; font-size: 15px; font-weight: 650; }
.side-quick span { display: block; font-size: 12px; opacity: 0.8; }
.side-label {
  padding: 14px 12px 4px;
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted);
}
.nav-item {
  display: flex; align-items: center; gap: 12px;
  min-height: 44px; padding: 8px 12px;
  border-radius: var(--r-nav);
  font-size: 15px; font-weight: 550; color: var(--fg);
  transition: background 0.15s ease, color 0.15s ease;
}
.nav-item svg { width: 20px; height: 20px; flex-shrink: 0; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; color: var(--muted); }
.nav-item:hover { background: color-mix(in oklch, var(--fg) 5%, transparent); }
.nav-item.active { background: var(--accent-soft); color: var(--accent-strong); font-weight: 650; }
.nav-item.active svg { color: var(--accent-strong); }
.nav-item .count {
  margin-left: auto; min-width: 24px; padding: 1px 8px; border-radius: 999px;
  font-family: var(--font-mono); font-size: 12px; font-weight: 600; text-align: center;
  background: var(--surface); border: 1px solid var(--border); color: var(--muted);
}
.side-foot { margin-top: auto; padding-top: 14px; display: grid; gap: 10px; }
.side-meter { padding: 12px 14px; border-radius: 14px; background: var(--surface); border: 1px solid var(--border); }
.side-meter .top { display: flex; justify-content: space-between; font-size: 12.5px; font-weight: 600; }
.side-meter .top .mono { color: var(--muted); font-weight: 500; }
.side-user { display: flex; align-items: center; gap: 10px; padding: 6px 8px; border-radius: 12px; }
.side-user:hover { background: color-mix(in oklch, var(--fg) 5%, transparent); }
.side-user img { width: 34px; height: 34px; border-radius: 50%; object-fit: cover; }
.side-user b { display: block; font-size: 14px; }
.side-user span { display: block; font-size: 12px; color: var(--muted); }
body.android .nav-item { min-height: 56px; padding: 0 18px; font-weight: 500; }
body.android .side-quick { border-radius: 16px; min-height: 60px; }
body.android .nav-item.active { font-weight: 600; }

/* Page head */
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; padding: 12px 0 22px; }
.page-head h1 { font-size: 32px; font-weight: 760; letter-spacing: -0.025em; line-height: 1.15; }
.page-head p { margin-top: 6px; color: var(--muted); font-size: 15px; max-width: 60ch; }
.page-head .actions { display: flex; gap: 10px; flex-shrink: 0; }
.eyebrow { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.eyebrow.teal { color: var(--accent-strong); }

/* Cards */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-card); padding: 20px 22px; box-shadow: var(--shadow-1); }
.card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.card-head h2 { font-size: 17px; font-weight: 700; letter-spacing: -0.01em; }
.card-head .mono { font-size: 13px; color: var(--muted); }
.grid-2 { display: grid; grid-template-columns: 1.35fr 1fr; gap: var(--gap); align-items: start; }
.stack { display: grid; gap: var(--gap); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 12px 20px; border-radius: var(--r-btn);
  font-size: 15px; font-weight: 650; letter-spacing: -0.005em; white-space: nowrap;
  transition: transform 0.08s ease, background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}
.btn:active { transform: translateY(1px) scale(0.99); }
.btn svg { width: 17px; height: 17px; stroke: currentColor; fill: none; stroke-width: 2.1; stroke-linecap: round; stroke-linejoin: round; }
.btn-primary {
  background: var(--accent-strong); color: var(--surface);
  box-shadow: 0 12px 24px -12px color-mix(in oklch, var(--accent-strong) 70%, transparent), inset 0 1px 0 color-mix(in oklch, white 22%, transparent);
}
.btn-primary:hover { background: color-mix(in oklch, var(--accent-strong) 88%, black); }
.btn-primary[disabled] { background: color-mix(in oklch, var(--fg) 12%, var(--bg)); color: var(--muted); box-shadow: none; cursor: default; }
.btn-outline { border: 1.5px solid var(--accent-strong); color: var(--accent-strong); background: var(--surface); }
.btn-outline:hover { background: var(--accent-soft); }
.btn-quiet { border: 1px solid var(--border); background: var(--surface); color: var(--fg); }
.btn-quiet:hover { border-color: color-mix(in oklch, var(--fg) 25%, var(--border)); }
.btn-dark { background: var(--fg); color: var(--surface); }
.btn-dark:hover { background: color-mix(in oklch, var(--fg) 85%, black); }
.btn-block { width: 100%; }
.btn-lg { min-height: 56px; font-size: 16px; }
.link { color: var(--accent-strong); font-weight: 600; }
.link:hover { text-decoration: underline; }
.chip-back {
  display: inline-flex; align-items: center; gap: 4px;
  min-height: 40px; padding: 8px 16px 8px 12px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border);
  font-size: 14px; font-weight: 600; color: var(--muted);
}
.chip-back:hover { color: var(--fg); border-color: color-mix(in oklch, var(--fg) 25%, var(--border)); }
.icon-btn {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  background: var(--surface); border: 1px solid var(--border); color: var(--muted);
}
.icon-btn:hover { color: var(--fg); }
.icon-btn svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
body.android .icon-btn { border-radius: 999px; }

/* Pills, filters, tags */
.pills { display: flex; flex-wrap: wrap; gap: 6px; }
.pill {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 34px; padding: 5px 13px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface);
  font-size: 13.5px; font-weight: 600; color: var(--fg);
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.pill:hover { border-color: color-mix(in oklch, var(--fg) 22%, var(--border)); }
.pill.on { background: var(--accent-soft); border-color: transparent; color: var(--accent-strong); }
.tag { display: inline-flex; align-items: center; min-height: 24px; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; background: var(--mint); }
.tag.sky { background: var(--sky); } .tag.peach { background: var(--peach); } .tag.lilac { background: var(--lilac); } .tag.butter { background: var(--butter); }
.tag.level { background: var(--accent-soft); color: var(--accent-strong); }

/* Progress */
.bar { height: 6px; border-radius: 6px; background: var(--accent-soft); overflow: hidden; }
.bar > i { display: block; height: 100%; border-radius: inherit; background: var(--accent); transition: width 0.5s var(--ease); }
.bar.thick { height: 22px; border-radius: 11px; }

/* List rows */
.rows { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-card); overflow: hidden; }
.row {
  display: flex; align-items: center; gap: 14px; width: 100%;
  min-height: 52px; padding: 10px 18px; text-align: left;
  border-top: 1px solid var(--border);
}
.row:first-child { border-top: 0; }
button.row:hover, a.row:hover { background: color-mix(in oklch, var(--fg) 3%, var(--surface)); }
.row .grow { flex: 1; min-width: 0; }
.row .val { color: var(--muted); font-size: 14px; }
.row .chev { color: var(--muted); font-size: 18px; line-height: 1; }
.row.danger { color: var(--danger); }
.group-label { padding: 18px 4px 8px; font-size: 12.5px; font-weight: 650; color: var(--muted); }

/* Switch */
.switch { position: relative; width: 50px; height: 30px; border-radius: 999px; background: color-mix(in oklch, var(--fg) 16%, var(--bg)); transition: background 0.2s ease; flex-shrink: 0; }
.switch::after { content: ""; position: absolute; top: 3px; left: 3px; width: 24px; height: 24px; border-radius: 50%; background: var(--surface); box-shadow: 0 2px 5px color-mix(in oklch, var(--fg) 25%, transparent); transition: transform 0.2s var(--ease); }
.switch[aria-checked="true"] { background: var(--accent); }
.switch[aria-checked="true"]::after { transform: translateX(20px); }
body.android .switch { width: 52px; height: 32px; }
body.android .switch::after { top: 4px; left: 4px; width: 24px; height: 24px; }

/* Pastel tiles (Quiz) */
.tile {
  position: relative; display: flex; flex-direction: column; justify-content: space-between;
  min-height: 176px; padding: 18px 20px; border-radius: var(--r-card); text-align: left;
  border: 1px solid color-mix(in oklch, var(--fg) 5%, transparent);
  transition: transform 0.15s var(--ease), box-shadow 0.15s ease;
}
.tile:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); }
.tile:active { transform: translateY(0); }
.tile h3 { font-size: 20px; font-weight: 750; letter-spacing: -0.015em; }
.tile .sub { font-size: 13.5px; color: color-mix(in oklch, var(--fg) 70%, transparent); margin-top: 2px; }
.tile .sample { font-size: 14px; line-height: 1.45; padding: 10px 12px; border-radius: 12px; background: color-mix(in oklch, var(--surface) 70%, transparent); }
.tile .num { position: absolute; top: 16px; right: 18px; font-family: var(--font-mono); font-weight: 700; font-size: 15px; }
.tile .num.red { color: var(--danger); } .tile .num.green { color: var(--ok-strong); }
.t-mint { background: var(--mint); } .t-sky { background: var(--sky); } .t-butter { background: var(--butter); }
.t-lilac { background: var(--lilac); } .t-peach { background: var(--peach); } .t-coral { background: var(--coral); }

/* Stars */
.star { font-size: 18px; line-height: 1; color: var(--gold); }
.star.silver { color: var(--silver); }
.star.empty { color: var(--border); }

/* Covers */
.cover { aspect-ratio: 4 / 3; border-radius: var(--r-card); overflow: hidden; background: var(--accent-soft); }
.cover img { width: 100%; height: 100%; object-fit: cover; }

/* Sheet / modal */
.scrim { position: fixed; inset: 0; z-index: 50; background: color-mix(in oklch, var(--fg) 40%, transparent); display: grid; place-items: center; opacity: 0; pointer-events: none; transition: opacity 0.2s ease; }
.scrim.open { opacity: 1; pointer-events: auto; }
.sheet { width: min(520px, 90vw); max-height: 88vh; overflow: auto; background: var(--surface); border-radius: 24px; padding: 24px 26px; box-shadow: 0 40px 80px -30px color-mix(in oklch, var(--fg) 60%, transparent); transform: translateY(16px) scale(0.98); transition: transform 0.25s var(--ease); }
.scrim.open .sheet { transform: none; }
.sheet h2 { font-size: 20px; font-weight: 750; letter-spacing: -0.015em; }
body.android .sheet { border-radius: 28px; }

/* Fields */
.field { display: grid; gap: 6px; }
.field label { font-size: 13px; font-weight: 600; color: var(--muted); }
.input {
  width: 100%; min-height: 50px; padding: 12px 14px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--surface); font-size: 15px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.input:focus { outline: 0; border-color: var(--accent); box-shadow: 0 0 0 4px color-mix(in oklch, var(--accent) 18%, transparent); }
body.android .input { border-radius: 4px 4px 0 0; border-width: 0 0 2px; background: color-mix(in oklch, var(--fg) 4%, var(--surface)); }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 36px; z-index: 60;
  transform: translateX(-50%) translateY(12px);
  background: var(--fg); color: var(--surface);
  padding: 12px 18px; border-radius: 12px; font-size: 14px; font-weight: 600;
  opacity: 0; pointer-events: none; white-space: nowrap;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
body.android .toast { border-radius: 8px; }

/* Answer options (games) */
.opt {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  min-height: 60px; padding: 14px 18px; border-radius: var(--r-btn);
  border: 1.5px solid var(--border); background: var(--surface);
  font-size: 17px; font-weight: 600; text-align: left;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease, opacity 0.2s ease;
}
body.android .opt { border-radius: 16px; }
.opt:hover { border-color: color-mix(in oklch, var(--fg) 25%, var(--border)); }
.opt small { font-size: 13px; font-weight: 500; color: var(--muted); }
.opt.right { border-color: var(--ok); background: color-mix(in oklch, var(--ok) 10%, var(--surface)); color: var(--ok-strong); }
.opt.wrong { border-color: var(--danger); background: color-mix(in oklch, var(--danger) 8%, var(--surface)); color: var(--danger); }
.opt.fade { opacity: 0.35; }
.opt[disabled] { cursor: default; }

/* Games (game.js) */
.game { height: 100%; display: flex; flex-direction: column; padding: 12px var(--pad) 26px; }
.g-top { display: flex; align-items: center; gap: 12px; }
.g-badge { display: inline-flex; align-items: center; min-height: 32px; padding: 4px 12px; border-radius: 999px; background: color-mix(in oklch, var(--fg) 6%, var(--surface)); font-size: 13px; font-weight: 600; color: var(--muted); }
.g-count { margin-left: auto; font-size: 14px; color: var(--muted); }
.g-bar { margin-top: 12px; height: 4px; }
.g-body { flex: 1; min-height: 0; display: grid; grid-template-columns: 1.12fr 1fr; gap: 40px; align-items: center; padding-top: 18px; }
.g-left { display: grid; gap: 16px; align-content: center; min-width: 0; }
.g-right { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.g-card { padding: 30px 32px; min-height: 250px; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; gap: 14px; }
.g-card.story { min-height: 0; padding: 22px 26px; }
.g-cover { aspect-ratio: 16 / 9; background: none; border: 0; border-radius: 0; box-shadow: none; }
.g-cover img { object-fit: contain; }
.g-sentence { font-size: 28px; font-weight: 650; line-height: 1.4; letter-spacing: -0.012em; }
.g-card.story .g-sentence { font-size: 24px; }
.blank { color: var(--muted); font-weight: 500; letter-spacing: 0; }
.blank.ok { color: var(--ok-strong); font-weight: 700; border-bottom: 2px solid var(--ok); }
.g-meaning { font-size: 30px; font-weight: 750; line-height: 1.3; letter-spacing: -0.02em; }
.g-meta { font-size: 13px; color: var(--muted); }
.g-zhline { font-size: 18px; line-height: 1.6; }
.g-zh-box { padding: 10px 16px; border-radius: 12px; background: var(--accent-soft); color: var(--accent-strong); font-size: 18px; font-weight: 650; }
.g-label { display: flex; align-items: center; justify-content: space-between; min-height: 34px; font-size: 14px; color: var(--muted); }
.g-label b { color: var(--fg); font-size: 15px; }
.g-opts { display: grid; gap: 10px; }
.g-opts.two { grid-template-columns: 1fr 1fr; }
.opt small.zh { font-size: 14px; }
.opt.notsure { grid-column: 1 / -1; justify-content: center; color: var(--muted); font-weight: 550; }
.opt.gone { opacity: 0; pointer-events: none; }
.g-feedback { min-height: 22px; font-size: 14px; color: var(--muted); }
.g-feedback.good { color: var(--ok-strong); font-weight: 650; }
.g-feedback.bad { color: var(--danger); font-weight: 650; }
.rating { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.rating .r { padding: 10px; border-radius: 12px; border: 1.5px solid; text-align: center; opacity: 0.35; transition: opacity 0.2s ease; }
.rating .r b { display: block; font-size: 15px; }
.rating .r span { font-size: 12.5px; }
.rating .r.on { opacity: 1; }
.rating .hard { border-color: var(--warn); color: oklch(52% 0.13 60); }
.rating .hard.on { background: color-mix(in oklch, var(--warn) 16%, var(--surface)); }
.rating .again { border-color: var(--danger); color: var(--danger); }
.rating .again.on { background: color-mix(in oklch, var(--danger) 10%, var(--surface)); }
.rating .easy { border-color: var(--ok); color: var(--ok-strong); }
.rating .easy.on { background: color-mix(in oklch, var(--ok) 12%, var(--surface)); }
.g-actions { display: flex; gap: 10px; margin-top: 6px; }
.g-actions .btn { flex: 1; }
.g-left.done { align-content: center; }
.done-title { font-size: 46px; font-weight: 800; letter-spacing: -0.03em; margin-top: 6px; }
.done-score { font-size: 68px; font-weight: 700; color: var(--accent-strong); line-height: 1.05; }
.learned-list { display: grid; gap: 8px; max-height: 60vh; overflow-y: auto; scrollbar-width: none; }
.learned-list li { display: flex; align-items: center; gap: 14px; padding: 12px 16px; border-radius: 14px; background: var(--surface); border: 1px solid var(--border); }
.learned-list li > span:last-child { display: grid; }
.learned-list b { font-size: 16px; }
.set-row { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 14px 0; border-top: 1px solid var(--border); }
.set-row:first-of-type { margin-top: 14px; }
.set-row b { display: block; font-size: 15px; }
.set-row span { display: block; font-size: 13px; color: var(--muted); }
.set-row.col { flex-direction: column; align-items: flex-start; gap: 10px; }
.pause-pills.off { opacity: 0.4; pointer-events: none; }
.pause-pills .pill.on { border-color: var(--accent); }

/* Story ending (stories.js) */
.passage { padding: 6px 20px; }
.passage li { padding: 12px 0; border-top: 1px solid var(--border); font-size: 16px; line-height: 1.5; }
.passage li:first-child { border-top: 0; }
.passage b { color: var(--accent-strong); font-weight: 700; }
.passage .zh { font-size: 14px; margin-top: 2px; }
.lock { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: color-mix(in oklch, var(--fg) 70%, transparent); color: var(--surface); }
.lock svg { width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 2.2; }

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; } }