/* =========================================================
 * Fret Master — 視覺主題「舞台燈下的琴房」
 * ========================================================= */
:root {
  --bg: #0b0d12;
  --panel: #161a24;
  --panel2: #1e2433;
  --border: rgba(255, 255, 255, .075);
  --border-hi: rgba(255, 255, 255, .16);
  --text: #e6ebf2;
  --muted: #8b96a6;
  --accent: #5a8dff;
  --accent2: #ffb454;
  --gold: #ffd84a;
  --good: #3ec46d;
  --bad: #e8504f;
  --radius: 14px;
  --shadow: 0 12px 32px rgba(0, 0, 0, .3);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

[hidden] { display: none !important; }

html, body { height: 100%; }

body {
  background:
    radial-gradient(1100px 560px at 72% -8%, rgba(90, 141, 255, .09), transparent 62%),
    radial-gradient(900px 520px at 12% 112%, rgba(255, 180, 84, .065), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: "Segoe UI Variable", "Segoe UI", "Microsoft JhengHei", "PingFang TC", sans-serif;
  font-size: 14px;
  overflow: hidden;
  height: 100dvh;
  -webkit-tap-highlight-color: transparent;
}
button, .topbar, .card summary, .question-text, .feedback { -webkit-user-select: none; user-select: none; }

kbd {
  font-size: 10px;
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .08);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 1px 5px;
  margin-left: 7px;
  font-family: inherit;
}

.muted { color: var(--muted); }
.small { font-size: 12px; }
.gold { color: var(--gold); }

/* ========== 開場動畫 ========== */
.splash {
  position: fixed;
  inset: 0;
  z-index: 100;
  background:
    radial-gradient(900px 480px at 50% 18%, rgba(255, 201, 77, .08), transparent 60%),
    radial-gradient(1200px 700px at 50% 120%, rgba(90, 141, 255, .07), transparent 60%),
    #07080c;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  overflow: hidden;
  transition: opacity .75s ease;
  user-select: none;
}
.splash.out { opacity: 0; pointer-events: none; }
.sp-strings {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
  pointer-events: none;
}
.sp-strings i {
  display: block;
  background: linear-gradient(90deg, transparent 2%, rgba(255, 216, 74, .55), transparent 98%);
  transform: scaleX(0);
  opacity: .55;
}
.sp-strings i:nth-child(1) { height: 1px; }
.sp-strings i:nth-child(2) { height: 1.3px; }
.sp-strings i:nth-child(3) { height: 1.7px; }
.sp-strings i:nth-child(4) { height: 2.1px; }
.sp-strings i:nth-child(5) { height: 2.6px; }
.sp-strings i:nth-child(6) { height: 3.2px; }
.splash.playing .sp-strings i { animation: stringIn 1.1s cubic-bezier(.25, .8, .25, 1) forwards; }
.splash.playing .sp-strings i:nth-child(1) { animation-delay: .05s; }
.splash.playing .sp-strings i:nth-child(2) { animation-delay: .17s; }
.splash.playing .sp-strings i:nth-child(3) { animation-delay: .29s; }
.splash.playing .sp-strings i:nth-child(4) { animation-delay: .41s; }
.splash.playing .sp-strings i:nth-child(5) { animation-delay: .53s; }
.splash.playing .sp-strings i:nth-child(6) { animation-delay: .65s; }
@keyframes stringIn { to { transform: scaleX(1); } }

.sp-inner { text-align: center; position: relative; }
.sp-logo {
  height: min(340px, 46vh);
  width: auto;
  max-width: 82vw;
  object-fit: contain;
  display: block;
  margin: 0 auto 4px;
  filter: drop-shadow(0 14px 40px rgba(255, 201, 77, .3));
  animation: logoFloat 3.6s ease-in-out infinite;
  user-select: none;
}
@keyframes logoFloat {
  50% { transform: translateY(-8px); }
}
.splash.playing .sp-logo { animation: logoIn 1.5s cubic-bezier(.2, .9, .25, 1) forwards; }
@keyframes logoIn {
  0% { transform: scale(.9); opacity: .2; filter: drop-shadow(0 0 0 rgba(255, 216, 74, 0)); }
  55% { opacity: 1; filter: drop-shadow(0 0 46px rgba(255, 216, 74, .5)); }
  100% { transform: scale(1); filter: drop-shadow(0 12px 34px rgba(255, 216, 74, .28)); }
}
.sp-sub {
  color: #97a3b5;
  letter-spacing: .42em;
  font-size: 13.5px;
  margin-left: .42em;
}
.sp-cta {
  display: inline-block;
  margin-top: 40px;
  color: var(--gold);
  border: 1px solid rgba(255, 216, 74, .42);
  border-radius: 999px;
  padding: 11px 30px;
  font-size: 13.5px;
  letter-spacing: .22em;
  animation: ctaPulse 1.9s ease-in-out infinite;
}
@keyframes ctaPulse {
  50% { box-shadow: 0 0 26px rgba(255, 216, 74, .35); background: rgba(255, 216, 74, .06); }
}
.splash.playing .sp-cta { opacity: 0; transition: opacity .35s; }
@media (prefers-reduced-motion: reduce) {
  .splash * { animation: none !important; }
  .sp-strings i { transform: scaleX(1); }
}

/* ========== 頂欄 ========== */
.topbar {
  height: calc(54px + env(safe-area-inset-top, 0px));
  padding-top: env(safe-area-inset-top, 0px);
  display: flex;
  align-items: center;
  gap: 18px;
  padding-left: calc(16px + env(safe-area-inset-left, 0px));
  padding-right: calc(16px + env(safe-area-inset-right, 0px));
  background: linear-gradient(180deg, rgba(255, 255, 255, .035), rgba(255, 255, 255, 0)), var(--panel);
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 5;
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 17px;
  white-space: nowrap;
}
.brand-pick { height: 34px; width: auto; display: block; filter: drop-shadow(0 2px 8px rgba(255, 201, 77, .4)); }
.icon-btn { padding: 6px 10px; font-size: 16px; line-height: 1; }
.brand b {
  background: linear-gradient(180deg, #fff3d6, #ffd84a 70%, #d89a25);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 800;
  letter-spacing: .02em;
}
.brand-sub { color: var(--muted); font-size: 12px; }
.tabs { display: flex; gap: 6px; flex: 1; }
.tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  padding: 8px 15px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  transition: all .16s;
}
.tab-btn:hover { color: var(--text); background: rgba(255, 255, 255, .05); }
.tab-btn.active {
  color: var(--text);
  background: linear-gradient(180deg, rgba(90, 141, 255, .16), rgba(90, 141, 255, .07));
  border-color: rgba(90, 141, 255, .35);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .07), 0 2px 10px rgba(90, 141, 255, .12);
}

/* ========== 版面 ========== */
.layout { display: flex; height: calc(100dvh - 54px - env(safe-area-inset-top, 0px)); }
.menu-btn { display: none; font-size: 17px; padding: 7px 12px; }
.drawer-back { display: none; }
.sidebar {
  width: 326px;
  min-width: 326px;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-right: 1px solid var(--border);
  background: rgba(0, 0, 0, .18);
}
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }

/* ========== 卡片 ========== */
.card {
  background: linear-gradient(180deg, rgba(255, 255, 255, .035), rgba(255, 255, 255, .008)), var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: 0 8px 22px rgba(0, 0, 0, .22);
}
.card h2 {
  font-size: 14px;
  margin-bottom: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}
.card h2::before {
  content: '';
  width: 3.5px;
  height: 15px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--gold), var(--accent2));
  box-shadow: 0 0 8px rgba(255, 200, 80, .4);
}
.card summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
  user-select: none;
}
.card summary::before { content: '▸ '; color: var(--muted); }
.card[open] > summary::before { content: '▾ '; }
.details-body { margin-top: 11px; display: flex; flex-direction: column; gap: 10px; }
.sub-h { font-size: 12px; color: var(--muted); margin: 13px 0 7px; }
.sub-h2 { font-size: 14px; font-weight: 700; margin: 16px 0 11px; display: flex; align-items: center; gap: 8px; }
.sub-h2::before { content: ''; width: 3.5px; height: 15px; border-radius: 3px; background: linear-gradient(180deg, var(--gold), var(--accent2)); }
.prog-who {
  font-size: 12px;
  color: var(--accent2);
  font-weight: 600;
  margin-bottom: 9px;
  padding: 4px 9px;
  background: rgba(255, 180, 84, .08);
  border: 1px solid rgba(255, 180, 84, .2);
  border-radius: 7px;
  display: inline-block;
}

/* ========== 表單 ========== */
.field { display: flex; flex-direction: column; gap: 5px; margin-bottom: 8px; flex: 1; }
.field label { font-size: 12px; color: var(--muted); }
.field-row { display: flex; gap: 10px; }
select, input[type="number"] {
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 7px 9px;
  font-family: inherit;
  font-size: 13px;
  transition: border-color .15s;
}
select:hover { border-color: var(--border-hi); }
input[type="range"] { accent-color: var(--accent2); }
input[type="checkbox"] { accent-color: var(--accent); width: 15px; height: 15px; }
.chk-line { display: flex; align-items: center; gap: 8px; font-size: 13px !important; color: var(--text) !important; cursor: pointer; }

/* ========== 按鈕 ========== */
button { font-family: inherit; cursor: pointer; }
.primary-btn {
  background: linear-gradient(135deg, #6699ff, #3f6fe0 60%, #3157be);
  color: #fff;
  border: 1px solid rgba(130, 170, 255, .45);
  border-radius: 10px;
  padding: 10px 17px;
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(63, 111, 224, .32), inset 0 1px 0 rgba(255, 255, 255, .22);
  transition: all .15s;
}
.primary-btn:hover:not(:disabled) { filter: brightness(1.12); transform: translateY(-1px); }
.primary-btn:active:not(:disabled) { transform: translateY(0) scale(.985); }
.primary-btn:disabled { opacity: .4; cursor: default; }
.ghost-btn {
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px 14px;
  font-size: 13px;
  transition: all .15s;
}
.ghost-btn:hover:not(:disabled) { border-color: var(--border-hi); transform: translateY(-1px); }
.ghost-btn:disabled { opacity: .4; cursor: default; }
.danger-btn {
  background: transparent;
  color: var(--bad);
  border: 1px solid rgba(232, 80, 79, .4);
  border-radius: 10px;
  padding: 9px 14px;
  font-size: 13px;
  transition: background .15s;
}
.danger-btn:hover { background: rgba(232, 80, 79, .12); }
.wide { width: 100%; margin-top: 8px; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; }
.sm { padding: 6px 10px; font-size: 12px; border-radius: 8px; }

/* ========== 進度卡 ========== */
.stage-chips { display: flex; gap: 6px; margin-bottom: 11px; }
.stage-chip {
  flex: 1;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 6px 4px 7px;
  text-align: center;
  font-size: 14px;
  transition: all .2s;
}
.stage-chip.active {
  border-color: rgba(255, 216, 74, .5);
  background: linear-gradient(180deg, rgba(255, 216, 74, .12), rgba(255, 216, 74, .03));
  box-shadow: 0 0 14px rgba(255, 216, 74, .12);
}
.sc-dots { display: flex; gap: 3px; justify-content: center; margin-top: 5px; }
.sc-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .14);
}
.sc-dot.done { background: var(--gold); box-shadow: 0 0 6px rgba(255, 216, 74, .6); }
.sc-dot.cur { background: var(--accent); box-shadow: 0 0 6px rgba(90, 141, 255, .7); }
.prog-level { display: flex; align-items: baseline; gap: 9px; margin: 2px 0 3px; }
.pl-num { font-size: 19px; font-weight: 800; color: var(--gold); }
.pl-num i { font-style: normal; font-size: 12px; color: var(--muted); font-weight: 400; }
.progress-track {
  height: 9px;
  background: var(--panel2);
  border-radius: 6px;
  overflow: hidden;
  margin: 8px 0 6px;
  position: relative;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #8ab4ff);
  border-radius: 6px;
  transition: width .4s;
  box-shadow: 0 0 10px rgba(90, 141, 255, .5);
}
.progress-goal { position: absolute; top: -2px; bottom: -2px; width: 2px; background: var(--gold); left: 90%; }

/* ========== 題型清單 ========== */
.type-list { display: flex; flex-direction: column; gap: 3px; max-height: 200px; overflow-y: auto; }
.type-list label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text);
  padding: 4px 7px;
  border-radius: 7px;
  cursor: pointer;
}
.type-list label:hover { background: rgba(255, 255, 255, .045); }
.type-lv-tag {
  margin-left: auto;
  font-size: 10px;
  color: var(--muted);
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1px 6px;
}

/* ========== 測驗中面板 ========== */
.quiz-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.qs-item {
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 11px;
  display: flex;
  flex-direction: column;
}
.qs-label { font-size: 11px; color: var(--muted); }
.qs-val { font-size: 20px; font-weight: 800; }
.metro-lamps { display: flex; gap: 10px; justify-content: center; margin-top: 13px; }
.metro-lamp {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--panel2);
  border: 1px solid var(--border);
  transition: all .07s;
}
.metro-lamp.on { background: var(--accent2); box-shadow: 0 0 16px var(--accent2); }
.metro-lamp.accent.on { background: var(--bad); box-shadow: 0 0 16px var(--bad); }
.countdown-bar { height: 7px; background: var(--panel2); border-radius: 5px; overflow: hidden; margin-top: 10px; }
#countdownFill { height: 100%; background: linear-gradient(90deg, var(--accent2), #ff8c54); width: 100%; transition: width .2s linear; }

/* ========== 闖關清單（階段分組） ========== */
.stage-group {
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 9px 11px;
  margin-bottom: 9px;
}
.stage-group summary {
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.sg-count {
  margin-left: auto;
  font-size: 11px;
  color: var(--gold);
  background: rgba(255, 216, 74, .1);
  border: 1px solid rgba(255, 216, 74, .25);
  border-radius: 999px;
  padding: 1px 9px;
}
.lv-row {
  background: rgba(0, 0, 0, .22);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 8px 10px;
  margin-top: 8px;
  transition: border-color .15s;
}
.lv-row:hover { border-color: var(--border-hi); }
.lv-row.boss {
  border-color: rgba(255, 216, 74, .35);
  background: linear-gradient(180deg, rgba(255, 216, 74, .07), rgba(0, 0, 0, .22));
}
.lv-row.locked { opacity: .5; }
.lv-name { font-size: 12.5px; }
.lv-row .muted { font-size: 11px; line-height: 1.5; margin-top: 2px; }
.lv-act { display: flex; gap: 7px; margin-top: 8px; align-items: center; }
.li-score { margin-left: auto; order: 9; font-size: 12px; color: var(--accent2); font-weight: 700; }
.li-pass { color: var(--good); }

/* ========== 主面板 ========== */
.board-wrap { flex: 1; min-height: 0; padding: 10px 12px 0; position: relative; }
#board {
  width: 100%;
  height: 100%;
  border-radius: var(--radius);
  background:
    radial-gradient(130% 150% at 50% -10%, #161b29 0%, #0d1018 62%, #0a0c12 100%);
  border: 1px solid var(--border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .04), var(--shadow);
  touch-action: none;
}

/* 指板捲軸 */
.board-scroll {
  height: 13px;
  margin: 8px 12px 0;
  border-radius: 8px;
  background: rgba(255, 255, 255, .05);
  border: 1px solid var(--border);
  position: relative;
  cursor: pointer;
}
.bs-thumb {
  position: absolute;
  top: 1px;
  bottom: 1px;
  border-radius: 7px;
  background: linear-gradient(180deg, #ffd06e, #dd9b2e);
  box-shadow: 0 1px 6px rgba(0, 0, 0, .4), inset 0 1px 0 rgba(255, 255, 255, .35);
  cursor: grab;
  transition: filter .15s;
}
.bs-thumb:hover { filter: brightness(1.12); }
.bs-thumb:active { cursor: grabbing; }
.board-scroll.full { opacity: .35; }

.bottom-panel {
  padding: 12px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 9px;
  min-height: 136px;
}
.question-text { font-size: 16.5px; line-height: 1.55; }
.question-text b { color: var(--accent2); }
.choice-box { display: flex; gap: 10px; flex-wrap: wrap; }
.choice-btn {
  background: linear-gradient(180deg, rgba(255, 255, 255, .04), rgba(255, 255, 255, 0)), var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 600;
  min-width: 116px;
  transition: all .14s;
}
.choice-btn:hover:not(:disabled) { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 6px 16px rgba(0, 0, 0, .3); }
.choice-btn:disabled { opacity: .35; }
.choice-btn.correct {
  background: rgba(62, 196, 109, .22);
  border-color: var(--good);
  opacity: 1 !important;
  box-shadow: 0 0 14px rgba(62, 196, 109, .25);
}
.choice-btn.wrong {
  background: rgba(232, 80, 79, .22);
  border-color: var(--bad);
  opacity: 1 !important;
}
.action-row { display: flex; gap: 9px; align-items: center; flex-wrap: wrap; }
.feedback { font-size: 14.5px; font-weight: 700; animation: popIn .25s cubic-bezier(.2, 1.4, .4, 1); }
.feedback.ok { color: var(--good); }
.feedback.no { color: var(--bad); }
.feedback.hint { color: var(--accent2); font-weight: 600; }
.feedback.hint b { color: var(--gold); }
@keyframes popIn { from { transform: scale(.75); opacity: 0; } }

.explain-box {
  background: linear-gradient(180deg, rgba(255, 216, 74, .045), rgba(255, 255, 255, .01)), var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--gold);
  border-radius: 11px;
  padding: 12px 15px;
  font-size: 13.5px;
  line-height: 1.75;
  max-height: 190px;
  overflow-y: auto;
  animation: popIn .25s cubic-bezier(.2, 1.2, .4, 1);
}
.tone-row { display: flex; gap: 8px; margin: 8px 0; flex-wrap: wrap; }
.tone-chip {
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 5px 13px;
  font-weight: 700;
  font-size: 14px;
}
.tone-chip i { font-style: normal; font-size: 10px; color: var(--muted); display: block; font-weight: 400; }
.tone-chip.root {
  border-color: rgba(255, 216, 74, .6);
  color: var(--gold);
  box-shadow: 0 0 12px rgba(255, 215, 0, .18);
  background: rgba(255, 216, 74, .07);
}

/* ========== 探索模式 ========== */
.dia-box {
  margin: 10px 12px 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, .03), rgba(255, 255, 255, .005)), var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 13px;
}
.dia-row { display: flex; gap: 7px; flex-wrap: wrap; align-items: center; }
.dia-row + .dia-row { margin-top: 9px; }
.dia-btn {
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 7px 14px;
  font-size: 14px;
  font-weight: 700;
  transition: all .14s;
}
.dia-btn .roman { display: block; font-size: 10px; color: var(--muted); font-weight: 400; }
.dia-btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.dia-btn.active {
  background: linear-gradient(180deg, rgba(90, 141, 255, .25), rgba(90, 141, 255, .1));
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(90, 141, 255, .2);
}
.dia-btn.active .roman { color: var(--accent); }
.prog-btn {
  background: transparent;
  color: var(--accent2);
  border: 1px solid rgba(255, 180, 84, .35);
  border-radius: 8px;
  padding: 5px 12px;
  font-size: 12px;
  transition: background .15s;
}
.prog-btn:hover { background: rgba(255, 180, 84, .12); }

.cof-svg { width: 100%; max-width: 300px; display: block; margin: 0 auto; }
.cof-key { cursor: pointer; }
.cof-major { fill: var(--panel2); stroke: var(--border); stroke-width: 1; transition: all .15s; }
.cof-minor { fill: rgba(255, 255, 255, .045); stroke: var(--border); }
.cof-key:hover .cof-major { stroke: var(--accent); }
.cof-key.selected .cof-major { fill: rgba(90, 141, 255, .32); stroke: var(--accent); stroke-width: 2; }
.cof-key.selected .cof-minor { stroke: var(--accent); }
.cof-major-txt { fill: var(--text); font-size: 14px; font-weight: 700; }
.cof-sig-txt { fill: var(--muted); font-size: 8px; }
.cof-minor-txt { fill: var(--muted); font-size: 10px; }
.cof-center { fill: var(--gold); font-size: 17px; font-weight: 800; }
.cof-center-sub { fill: var(--muted); font-size: 10px; }

/* ========== 統計 ========== */
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.stat-cell { background: var(--panel2); border: 1px solid var(--border); border-radius: 10px; padding: 9px 11px; }
.stat-cell .v { font-size: 20px; font-weight: 800; }
.stat-cell .k { font-size: 11px; color: var(--muted); }
.type-bar-row { margin-bottom: 8px; }
.type-bar-row .tb-label { display: flex; justify-content: space-between; font-size: 12px; margin-bottom: 3px; }
.tb-track { height: 7px; background: var(--panel2); border-radius: 5px; overflow: hidden; }
.tb-fill { height: 100%; border-radius: 5px; transition: width .4s; }
.heat-legend { display: flex; align-items: center; gap: 8px; font-size: 11px; color: var(--muted); }
.hl-bar { flex: 1; height: 9px; border-radius: 5px; background: linear-gradient(90deg, rgba(120, 170, 60, .3), rgba(255, 60, 60, .85)); }

/* ========== 教材 / 彈窗 ========== */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(4, 5, 9, .68);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
}
.modal-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, .04), rgba(255, 255, 255, .005)), var(--panel);
  border: 1px solid var(--border-hi);
  border-radius: 16px;
  width: min(720px, 92vw);
  max-height: 87vh;
  overflow-y: auto;
  padding: 28px 32px;
  position: relative;
  box-shadow: 0 24px 70px rgba(0, 0, 0, .55);
  animation: modalIn .3s cubic-bezier(.2, 1.1, .35, 1);
}
@keyframes modalIn { from { transform: translateY(18px) scale(.97); opacity: 0; } }
.modal-close {
  position: sticky;
  top: 0;
  float: right;
  background: var(--panel2);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 9px;
  width: 31px;
  height: 31px;
  z-index: 2;
}
.modal-close:hover { color: var(--text); border-color: var(--border-hi); }
.modal-card h2 {
  margin-bottom: 16px;
  font-size: 20px;
  background: linear-gradient(180deg, #fff3d6, #ffd84a 75%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.modal-card h3 {
  margin: 20px 0 8px;
  font-size: 15px;
  color: var(--accent2);
  display: flex;
  align-items: center;
  gap: 8px;
}
.modal-card h3::before {
  content: '';
  width: 3px;
  height: 14px;
  border-radius: 2px;
  background: var(--accent2);
  flex: none;
}
.modal-card p, .modal-card li { line-height: 1.85; font-size: 13.5px; }
.modal-card p { margin: 6px 0; }
.modal-card ul, .modal-card ol { padding-left: 22px; margin: 7px 0; }
.modal-card li { margin: 3px 0; }
.lesson-goal {
  background: linear-gradient(90deg, rgba(255, 216, 74, .12), rgba(255, 216, 74, .03));
  border: 1px solid rgba(255, 216, 74, .3);
  border-radius: 11px;
  padding: 11px 15px;
  font-size: 13.5px;
  line-height: 1.7;
}
.modal-card .tip {
  background: rgba(255, 180, 84, .08);
  border-left: 3px solid var(--accent2);
  padding: 10px 14px;
  border-radius: 9px;
  margin: 10px 0;
  line-height: 1.8;
}
.modal-card .formula { font-size: 15px; letter-spacing: .35px; margin: 9px 0; }
.mini-board { max-width: 480px; display: block; margin: 10px 0 2px; filter: drop-shadow(0 4px 12px rgba(0, 0, 0, .35)); }
.fig-cap { font-size: 12px; color: var(--muted); margin: 3px 0 12px; line-height: 1.6; }
.mode-table, .cmp-table { border-collapse: collapse; width: 100%; margin: 9px 0; }
.mode-table th, .mode-table td, .cmp-table th, .cmp-table td {
  border: 1px solid var(--border);
  padding: 6.5px 10px;
  font-size: 12.5px;
  text-align: left;
  line-height: 1.55;
}
.mode-table th, .cmp-table th { background: var(--panel2); color: var(--muted); font-weight: 600; }
.cmp-table tr:nth-child(even) td { background: rgba(255, 255, 255, .018); }

.result-big { font-size: 46px; font-weight: 800; text-align: center; margin: 10px 0; }
.result-big.pass { color: var(--good); text-shadow: 0 0 30px rgba(62, 196, 109, .35); }
.result-big.fail { color: var(--bad); }
.result-sub { text-align: center; color: var(--muted); margin-bottom: 16px; }
.unlock-banner {
  text-align: center;
  background: linear-gradient(180deg, rgba(255, 215, 0, .14), rgba(255, 215, 0, .05));
  border: 1px solid rgba(255, 215, 0, .42);
  color: var(--gold);
  border-radius: 11px;
  padding: 13px;
  font-weight: 700;
  margin: 12px 0;
  line-height: 1.8;
  animation: glowPulse 1.7s ease-in-out infinite;
}
@keyframes glowPulse { 50% { box-shadow: 0 0 26px rgba(255, 215, 0, .32); } }

/* ========== Toast ========== */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(180deg, rgba(255, 255, 255, .05), rgba(255, 255, 255, .01)), var(--panel2);
  border: 1px solid var(--border-hi);
  border-radius: 11px;
  padding: 10px 21px;
  font-size: 13.5px;
  z-index: 60;
  box-shadow: 0 10px 34px rgba(0, 0, 0, .55);
  animation: popIn .22s cubic-bezier(.2, 1.3, .4, 1);
}

/* 捲軸 */
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, .14); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, .22); }
::-webkit-scrollbar-track { background: transparent; }

/* ========== 職業路線 ========== */
.prog-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.prog-who { font-size: 12px; color: var(--accent2); font-weight: 600; padding: 3px 9px; background: rgba(255, 180, 84, .08); border: 1px solid rgba(255, 180, 84, .2); border-radius: 7px; }
.streak { font-size: 12px; color: #ff8c54; font-weight: 700; }
.path-badge {
  display: flex; align-items: center; gap: 10px;
  background: linear-gradient(100deg, color-mix(in srgb, var(--pc) 22%, transparent), color-mix(in srgb, var(--pc) 6%, transparent));
  border: 1px solid color-mix(in srgb, var(--pc) 45%, transparent);
  border-radius: 11px; padding: 9px 12px; margin-bottom: 11px;
}
.pb-icon { font-size: 22px; }
.pb-name { font-weight: 800; font-size: 15px; }
.pb-switch {
  margin-left: auto; background: rgba(255, 255, 255, .08); color: var(--text);
  border: 1px solid var(--border-hi); border-radius: 8px; padding: 5px 11px; font-size: 12px; white-space: nowrap;
}
.pb-switch:hover { background: rgba(255, 255, 255, .15); }
.path-header { margin-bottom: 10px; }
.spec-dots { display: flex; gap: 5px; flex-wrap: wrap; margin-bottom: 11px; }

/* 職業地圖 */
.pathmap-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 11px; margin-top: 14px; }
.pathmap-card {
  background: linear-gradient(160deg, color-mix(in srgb, var(--pc) 12%, var(--panel2)), var(--panel2));
  border: 1px solid color-mix(in srgb, var(--pc) 35%, var(--border)); border-radius: 12px; padding: 12px;
  display: flex; flex-direction: column; gap: 7px;
}
.pathmap-card.locked { opacity: .55; filter: grayscale(.4); }
.pathmap-card.active { border-color: var(--pc); box-shadow: 0 0 0 1px var(--pc), 0 6px 18px color-mix(in srgb, var(--pc) 25%, transparent); }
.pm-head { display: flex; gap: 10px; align-items: center; }
.pm-icon { font-size: 26px; }
.pm-name { font-weight: 800; font-size: 14.5px; }
.pm-blurb { line-height: 1.5; flex: 1; }
.pm-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 2px; }
.pm-prog { font-size: 12px; color: var(--accent2); font-weight: 700; }
.pm-cur { font-size: 11px; color: var(--good); font-weight: 700; }
.pm-lock { font-size: 11.5px; color: var(--muted); }
@media (max-width: 620px) { .pathmap-grid { grid-template-columns: 1fr; } }
.pm-group { margin-top: 14px; }
.pm-group > summary {
  cursor: pointer; font-weight: 700; font-size: 15px; padding: 8px 0; list-style: none;
  display: flex; align-items: center; gap: 8px; border-bottom: 1px solid var(--border);
}
.pm-group > summary::before { content: '▸'; color: var(--muted); font-size: 12px; }
.pm-group[open] > summary::before { content: '▾'; }
.pm-group > summary .sg-count { margin-left: auto; }
.pm-group .pathmap-grid { margin-top: 11px; }

/* 每日練習 */
.daily-box {
  background: linear-gradient(110deg, rgba(255, 140, 84, .12), rgba(255, 180, 84, .04));
  border: 1px solid rgba(255, 140, 84, .3); border-radius: 12px; padding: 11px 13px; margin-bottom: 12px;
}
.daily-head { display: flex; justify-content: space-between; align-items: center; font-weight: 700; font-size: 14px; margin-bottom: 3px; }

/* 設定彈窗 */
.settings-card { width: min(560px, 94vw); }
.settings-card h3 { margin-top: 18px; }
.install-tip { margin: 0 0 8px; }
.install-steps { margin: 0; padding-left: 18px; display: flex; flex-direction: column; gap: 8px; }
.install-steps li { font-size: 13px; color: var(--text); line-height: 1.5; }
.install-steps b { color: var(--accent, #6ea8fe); }

/* ========== 安裝到手機橫幅（beforeinstallprompt） ========== */
.install-bar {
  position: fixed; left: 50%; top: calc(10px + env(safe-area-inset-top, 0px));
  z-index: 9100; transform: translate(-50%, -22px);
  display: flex; align-items: center; gap: 11px;
  width: min(440px, 94vw); padding: 10px 10px 10px 12px;
  background: linear-gradient(150deg, #1c2435, #10162400); background-color: #141b29;
  border: 1px solid var(--accent, #5a8dff); border-radius: 14px;
  box-shadow: 0 14px 36px rgba(0, 0, 0, .55), 0 0 0 3px rgba(90, 141, 255, .12);
  opacity: 0; pointer-events: none;
  transition: opacity .32s ease, transform .32s cubic-bezier(.2, .9, .3, 1.2);
}
.install-bar[hidden] { display: none; }
.install-bar.show { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }
.ib-icon { width: 38px; height: 38px; border-radius: 9px; flex: 0 0 auto; }
.ib-text { display: flex; flex-direction: column; gap: 1px; line-height: 1.3; flex: 1 1 auto; min-width: 0; }
.ib-text b { color: #fff; font-size: 14px; }
.ib-text span { color: var(--muted, #9aa6b6); font-size: 11.5px; }
.ib-go {
  flex: 0 0 auto; padding: 9px 16px; font-size: 14px; font-weight: 700; color: #fff;
  border: none; border-radius: 10px; cursor: pointer;
  background: linear-gradient(90deg, var(--accent, #5a8dff), #8ab4ff);
  box-shadow: 0 5px 14px rgba(90, 141, 255, .4);
}
.ib-go:active { transform: translateY(1px); }
.ib-x { background: none; border: none; color: var(--muted, #9aa6b6); font-size: 15px; cursor: pointer; padding: 4px 2px; flex: 0 0 auto; }

/* ========== 手機操作提示（小卡片，自動消失） ========== */
.mobile-tip {
  position: fixed; left: 50%; bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  z-index: 9000; transform: translate(-50%, 24px);
  display: flex; align-items: center; gap: 11px;
  max-width: min(380px, 92vw); padding: 11px 12px 11px 14px;
  background: linear-gradient(150deg, #1a2130, #0f1422);
  border: 1px solid var(--accent, #5a8dff); border-radius: 14px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, .5), 0 0 0 3px rgba(90, 141, 255, .12);
  opacity: 0; pointer-events: none;
  transition: opacity .32s ease, transform .32s cubic-bezier(.2, .9, .3, 1.2);
}
.mobile-tip[hidden] { display: none; }
.mobile-tip.show { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }
.mt-ico { font-size: 24px; line-height: 1; flex: 0 0 auto; animation: mtSpin 2.4s ease-in-out infinite; }
.mt-text { display: flex; flex-direction: column; gap: 1px; line-height: 1.35; }
.mt-text b { color: #fff; font-size: 14px; }
.mt-text span { color: var(--muted, #9aa6b6); font-size: 11.5px; }
.mt-x {
  background: none; border: none; color: var(--muted, #9aa6b6);
  font-size: 15px; cursor: pointer; line-height: 1; padding: 4px 2px; flex: 0 0 auto;
}
@keyframes mtSpin { 0%, 70%, 100% { transform: rotate(0); } 80% { transform: rotate(-22deg); } 90% { transform: rotate(22deg); } }

/* ========== 音名作答鍵盤 ========== */
.namepad { display: flex; flex-direction: column; gap: 9px; width: 100%; }
.np-row { display: flex; gap: 7px; flex-wrap: wrap; }
.np-btn {
  background: linear-gradient(180deg, rgba(255,255,255,.04), transparent), var(--panel2);
  color: var(--text); border: 1px solid var(--border); border-radius: 11px;
  min-width: 52px; padding: 13px 0; flex: 1; font-size: 19px; font-weight: 800; transition: all .13s;
}
.np-btn:hover:not(:disabled) { border-color: var(--accent); transform: translateY(-2px); }
.np-btn.sel { background: rgba(90,141,255,.25); border-color: var(--accent); box-shadow: 0 0 12px rgba(90,141,255,.25); }
.np-accs .np-btn { font-size: 22px; max-width: 90px; }
.np-btn.correct { background: rgba(62,196,109,.28); border-color: var(--good); color: #fff; }
.np-btn.wrong { background: rgba(232,80,79,.28); border-color: var(--bad); color: #fff; }
.np-btn:disabled { opacity: .85; }

/* ========== 首次引導 ========== */
.onb { text-align: center; }
.onb-logo { height: 120px; width: auto; margin: 4px auto 10px; display: block; filter: drop-shadow(0 8px 24px rgba(255,201,77,.3)); }
.onb h2 { background: none; -webkit-background-clip: initial; color: var(--text); margin-bottom: 10px; }
.onb-choices { display: flex; gap: 14px; justify-content: center; margin: 18px 0; flex-wrap: wrap; }
.onb-card {
  background: var(--panel2); border: 1px solid var(--border); border-radius: 14px;
  padding: 20px 26px; display: flex; flex-direction: column; align-items: center; gap: 5px;
  color: var(--text); min-width: 150px; transition: all .15s;
}
.onb-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.onb-card.sel { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), 0 6px 18px rgba(90,141,255,.2); background: rgba(90,141,255,.1); }
.onb-card .oc-ic { font-size: 40px; }
.onb-card b { font-size: 17px; }
.onb-tips { text-align: left; max-width: 460px; margin: 14px auto; line-height: 1.9; font-size: 13.5px; padding-left: 4px; list-style: none; }
.onb-tips li { margin: 7px 0; }
.onb-nav { display: flex; justify-content: space-between; gap: 10px; margin-top: 20px; }
.onb-nav .primary-btn { margin-left: auto; }

/* ========== 音樂字典 ========== */
.dict-view { flex: 1; min-height: 0; display: flex; flex-direction: column; padding: 12px 14px; gap: 10px; }
.dict-controls { display: flex; flex-direction: column; gap: 9px; }
.dict-search {
  width: 100%; background: var(--panel2); color: var(--text);
  border: 1px solid var(--border-hi); border-radius: 11px; padding: 11px 14px; font-size: 15px; font-family: inherit;
}
.dict-search:focus { outline: none; border-color: var(--accent); }
.dict-cats { display: flex; flex-wrap: wrap; gap: 6px; }
.dict-list { flex: 1; min-height: 0; overflow-y: auto; display: grid; grid-template-columns: 1fr 1fr; gap: 11px; align-content: start; padding-right: 2px; }
.dict-entry {
  background: linear-gradient(180deg, rgba(255,255,255,.03), transparent), var(--panel2);
  border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px;
}
.de-head { display: flex; align-items: baseline; gap: 8px; margin-bottom: 7px; }
.de-cat { font-size: 17px; flex: none; }
.de-tw { font-size: 18px; font-weight: 800; color: var(--text); }
.de-langs { display: flex; flex-direction: column; gap: 3px; margin-bottom: 7px; }
.de-row { display: flex; gap: 8px; font-size: 13px; color: var(--text); align-items: baseline; }
.de-flag { flex: none; width: 20px; }
.de-rdg { color: var(--accent2); font-size: 12px; }
.de-desc { font-size: 12.5px; color: var(--muted); line-height: 1.7; border-top: 1px dashed var(--border); padding-top: 7px; }
@media (max-width: 760px) { .dict-list { grid-template-columns: 1fr; } }

/* ========== 節奏訓練 ========== */
.rhythm-view { flex: 1; min-height: 0; display: flex; flex-direction: column; padding: 12px 14px; gap: 12px; }
.rv-title { font-weight: 800; }
.rv-pat { color: var(--accent2); font-weight: 700; margin-left: 4px; }
.tv-bar .rv-pat { flex: 1; }
.rv-body { flex: 1; min-height: 0; overflow-y: auto; display: flex; flex-direction: column; gap: 14px; }
.rv-controls { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
.rv-controls label { display: flex; align-items: center; gap: 7px; font-size: 13px; color: var(--muted); }
.rv-controls select { min-width: 120px; }
.rv-controls input[type="range"] { width: 120px; }
.rv-desc { line-height: 1.7; }
.rv-desc b { color: var(--accent2); }
.rv-grid { display: grid; grid-template-columns: repeat(8, 1fr); gap: 8px; max-width: 720px; }
.rv-cell {
  aspect-ratio: 1; border-radius: 12px; border: 1px solid var(--border);
  background: var(--panel2); display: flex; flex-direction: column; align-items: center; justify-content: center;
  position: relative; transition: transform .06s, box-shadow .06s, background .06s; min-height: 56px;
}
.rv-cell .rv-beat { position: absolute; top: 5px; left: 8px; font-size: 11px; color: var(--muted); }
.rv-cell .rv-arrow { font-size: 30px; font-weight: 800; line-height: 1; }
.rv-cell.rv-d .rv-arrow { color: var(--accent); }
.rv-cell.rv-u .rv-arrow { color: var(--accent2); }
.rv-cell.rv-x .rv-arrow { color: var(--muted); font-size: 24px; }
.rv-cell.rv-rest { opacity: .5; }
.rv-cell.beatcol { background: var(--panel); }
.rv-cell.playhead { box-shadow: 0 0 0 2px var(--gold), 0 0 18px rgba(255,216,74,.4); transform: translateY(-3px); background: rgba(255,216,74,.12); }
.rv-cell.hit { box-shadow: 0 0 0 2px var(--good); }
.rv-actions { display: flex; gap: 11px; align-items: center; flex-wrap: wrap; }
.rv-status { font-size: 13.5px; color: var(--muted); }
.rv-tapzone {
  border: 2px dashed rgba(255,216,74,.45); border-radius: 14px; padding: 26px; text-align: center;
  font-size: 16px; color: var(--accent2); cursor: pointer; user-select: none; background: rgba(255,216,74,.05);
}
.rv-tapzone:active { background: rgba(255,216,74,.14); }
.rv-tapzone.flash { background: rgba(255,216,74,.22); }
.rv-result {
  background: var(--panel); border: 1px solid var(--border); border-left: 3px solid var(--gold);
  border-radius: 12px; padding: 14px 16px; font-size: 14px; line-height: 1.7;
}
.rv-result .rv-acc { font-size: 30px; font-weight: 800; }
.rv-result .rv-acc.good { color: var(--good); }
.rv-result .rv-acc.mid { color: var(--accent2); }
.rv-result .rv-acc.low { color: var(--bad); }
@media (max-width: 620px) {
  .rv-grid { gap: 5px; }
  .rv-cell { min-height: 46px; }
  .rv-cell .rv-arrow { font-size: 24px; }
  .rv-controls { gap: 10px; }
}

/* ========== 和弦視譜練習 ========== */
.practice-sep { margin: 16px 0 8px; font-size: 12.5px; color: var(--muted); text-align: center; position: relative; }
.cs-bar { flex: 1; font-weight: 700; color: var(--accent2); margin-left: 8px; }
.cs-bpm { display: flex; align-items: center; gap: 7px; }
.bpm-step { background: var(--panel2); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 3px 9px; font-size: 13px; font-weight: 700; cursor: pointer; min-width: 34px; }
.bpm-step:hover { background: var(--panel); border-color: var(--accent2); color: var(--accent2); }
.bpm-step:active { transform: translateY(1px); }
.cs-custom { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.cs-custom input[type="text"] { flex: 1; min-width: 200px; background: var(--panel2); border: 1px solid var(--border); color: var(--text); border-radius: 9px; padding: 8px 12px; font-size: 14px; }
.cs-custom input[type="text"]:focus { outline: none; border-color: var(--accent2); }
.cs-custom-msg { font-size: 12px; color: var(--muted); flex-basis: 100%; }
.cs-custom-msg.ok { color: var(--good); }
.cs-custom-msg.warn { color: var(--accent2); }
.cs-custom-msg.err { color: var(--bad); }
.cs-saved { flex-basis: 100%; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin-top: 2px; }
.cs-saved-label { font-size: 11.5px; color: var(--muted); }
.cs-saved-chip { display: inline-flex; align-items: center; gap: 6px; background: var(--panel2); border: 1px solid var(--border); border-radius: 999px; padding: 3px 6px 3px 11px; font-size: 12px; }
.cs-saved-chip b { font-weight: 600; cursor: pointer; color: var(--text); }
.cs-saved-chip:hover { border-color: var(--accent2); }
.cs-saved-del { font-style: normal; cursor: pointer; color: var(--muted); font-size: 11px; padding: 0 3px; border-radius: 50%; }
.cs-saved-del:hover { color: var(--bad); background: rgba(255,255,255,.06); }
.cs-paste { width: 100%; box-sizing: border-box; background: var(--panel2); border: 1px solid var(--border); color: var(--text); border-radius: 10px; padding: 10px 12px; font-size: 13.5px; line-height: 1.6; font-family: ui-monospace, monospace; resize: vertical; }
.cs-paste:focus { outline: none; border-color: var(--accent2); }
.cs-paste-actions { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-top: 10px; flex-wrap: wrap; }
.cs-chk { font-size: 13px; color: var(--muted); }
.cs-lamps { display: flex; gap: 10px; justify-content: center; }
.cs-lamp { width: 16px; height: 16px; border-radius: 50%; background: var(--panel2); border: 1px solid var(--border); transition: transform .05s, box-shadow .05s, background .05s; }
.cs-lamp.down { border-color: var(--gold); }
.cs-lamp.on { background: var(--accent2); box-shadow: 0 0 12px var(--accent2); transform: scale(1.25); }
.cs-lamp.on.down { background: var(--gold); box-shadow: 0 0 14px var(--gold); }
.cs-stage { display: flex; align-items: center; justify-content: center; gap: 22px; flex-wrap: wrap; padding: 6px 0; }
.cs-now, .cs-next { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.cs-cap { font-size: 12px; color: var(--muted); letter-spacing: 1px; }
.cs-cur-name { font-size: 46px; font-weight: 800; line-height: 1; color: var(--gold); }
.cs-next-name { font-size: 30px; font-weight: 800; line-height: 1; color: var(--muted); }
.cs-arrow { font-size: 34px; color: var(--muted); }
.cs-dia svg { width: 150px; height: auto; }
.cs-dia:not(.big) svg { width: 104px; opacity: .85; }
.cs-rh { margin-top: 6px; width: 100%; max-width: 360px; }
.cs-rh-name { font-size: 13px; color: var(--accent2); font-weight: 700; margin-bottom: 5px; text-align: center; }
.cs-rh-grid { grid-template-columns: repeat(auto-fit, minmax(0, 1fr)); gap: 5px; max-width: 360px; margin: 0 auto; }
.cs-rh-grid .rv-cell { min-height: 38px; border-radius: 8px; }
.cs-rh-grid .rv-cell .rv-arrow { font-size: 18px; }
.cs-rh-grid .rv-cell .rv-beat { font-size: 9px; top: 3px; left: 5px; }
.cs-rh-arp { font-size: 13px; line-height: 1.7; color: var(--muted); text-align: center; }
.cs-rh-arp b { color: var(--accent2); }
@media (max-width: 620px) {
  .cs-cur-name { font-size: 36px; }
  .cs-next-name { font-size: 24px; }
  .cs-dia svg { width: 120px; }
  .cs-dia:not(.big) svg { width: 88px; }
  .cs-stage { gap: 12px; }
}

/* ========== 競速模式 ========== */
.speed-box {
  background: linear-gradient(110deg, rgba(90,141,255,.14), rgba(127,176,255,.04));
  border: 1px solid rgba(90,141,255,.35); border-radius: 12px; padding: 11px 13px; margin: 10px 0 0;
}
.speed-head { display: flex; justify-content: space-between; align-items: center; font-weight: 700; font-size: 14px; margin-bottom: 3px; }
.speed-best { color: var(--accent); font-weight: 800; }
.speed-records { margin-top: 8px; }
.speed-rec { display: flex; justify-content: space-between; font-size: 12px; padding: 3px 0; border-bottom: 1px solid var(--border); }
.speed-rec .sr-rank { color: var(--accent2); font-weight: 700; }
#qTimer.flash { color: var(--accent2); }

/* ========== 冷知識 ========== */
.trivia-cats { display: flex; flex-direction: column; gap: 10px; }
.tcat-group-h { display: block; width: 100%; text-align: left; background: none; border: none; color: var(--muted); font-size: 12px; font-weight: 700; padding: 2px 2px 5px; cursor: pointer; border-bottom: 1px solid var(--border); }
.tcat-group-h:hover { color: var(--accent2); }
.tcat-group-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.tcat-chip {
  background: var(--panel2); color: var(--text);
  border: 1px solid var(--border); border-radius: 999px;
  padding: 5px 11px; font-size: 12.5px; transition: all .14s; cursor: pointer;
}
.tcat-chip i { font-style: normal; opacity: .55; font-size: 10px; margin-left: 3px; }
.tcat-chip em { font-style: normal; font-size: 10px; margin-left: 4px; color: var(--good); opacity: .9; }
.tcat-chip em.weak { color: var(--bad); }
.tcat-chip.weak { border-color: color-mix(in srgb, var(--bad) 55%, var(--border)); }
.tcat-chip:hover { border-color: var(--cc); }
.tcat-chip.on { background: color-mix(in srgb, var(--cc) 22%, transparent); border-color: var(--cc); color: #fff; }
.trivia-cat-head { display: flex; justify-content: space-between; align-items: center; }
.trivia-cat-tools { display: flex; gap: 6px; }
.mini-btn { background: var(--panel2); border: 1px solid var(--border); color: var(--muted); border-radius: 7px; padding: 2px 9px; font-size: 11.5px; cursor: pointer; }
.mini-btn:hover { color: var(--accent2); border-color: var(--accent2); }
.seg-ctrl { display: flex; gap: 4px; flex-wrap: wrap; }
.seg-ctrl .seg { background: var(--panel2); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 5px 10px; font-size: 12px; cursor: pointer; transition: all .14s; }
.seg-ctrl .seg:hover { border-color: var(--accent2); }
.seg-ctrl .seg.on { background: color-mix(in srgb, var(--accent2) 22%, transparent); border-color: var(--accent2); color: #fff; }
.trivia-actions { gap: 8px; margin-top: 8px; flex-wrap: wrap; }
.trivia-actions button { flex: 1 1 30%; }
.tv-fav { float: right; background: var(--panel2); border: 1px solid var(--border); color: var(--muted); border-radius: 8px; padding: 3px 11px; font-size: 12.5px; cursor: pointer; transition: all .14s; }
.tv-fav:hover { border-color: var(--gold); color: var(--gold); }
.tv-fav.on { color: var(--gold); border-color: var(--gold); background: rgba(255,216,74,.1); }
/* 今日一題按鈕 */
.daily-trivia-btn { display: block; width: 100%; margin: 8px 0 4px; padding: 11px; border-radius: 12px; cursor: pointer;
  background: linear-gradient(135deg, color-mix(in srgb, var(--gold) 26%, var(--panel2)), var(--panel2));
  border: 1px solid color-mix(in srgb, var(--gold) 45%, var(--border)); color: var(--text); font-size: 14.5px; font-weight: 700; transition: all .15s; }
.daily-trivia-btn:hover { border-color: var(--gold); box-shadow: 0 0 16px rgba(255,216,74,.18); }
.daily-trivia-btn.done { background: var(--panel2); border-color: color-mix(in srgb, var(--good) 45%, var(--border)); color: var(--good); }
.daily-streak-note { text-align: center; color: var(--gold); font-size: 15px; margin: 6px 0; }

/* 學習教練 */
.cch-summary { font-size: 14px; line-height: 1.7; color: var(--text); margin-bottom: 12px; }
.cch-sec { margin-bottom: 14px; }
.cch-sec h3 { font-size: 15px; margin: 6px 0 7px; }
.cch-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.cch-tag { font-size: 13px; padding: 4px 11px; border-radius: 999px; background: var(--panel2); border: 1px solid var(--border); }
.cch-tag.good { color: var(--good); border-color: color-mix(in srgb, var(--good) 45%, var(--border)); }
.cch-weak { background: var(--panel2); border: 1px solid var(--border); border-left: 3px solid var(--bad); border-radius: 10px; padding: 9px 12px; margin-bottom: 8px; }
.cch-weak-h { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.cch-weak-h b { font-size: 14px; }
.cch-acc { font-size: 12px; color: var(--bad); white-space: nowrap; }
.cch-weak p { font-size: 13px; line-height: 1.7; color: var(--muted); margin: 5px 0 0; }
.cch-plan { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 9px; }
.cch-day { background: var(--panel2); border: 1px solid var(--border); border-radius: 10px; padding: 9px 11px; }
.cch-day-h { font-size: 13px; font-weight: 700; color: var(--accent2); margin-bottom: 5px; }
.cch-day ul { margin: 0; padding-left: 16px; }
.cch-day li { font-size: 12.5px; line-height: 1.6; color: var(--muted); }

/* 聽力訓練 */
.et-score { flex: 1; font-size: 13px; color: var(--muted); margin-left: 8px; }
.et-score b { color: var(--accent2); }
.et-segrow { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.et-seglabel { font-size: 13px; color: var(--muted); min-width: 32px; }
.et-stage { display: flex; flex-direction: column; align-items: center; gap: 14px; padding: 14px 0; }
.et-prompt { font-size: 22px; font-weight: 800; color: var(--gold); }
.et-replay { font-size: 17px; padding: 14px 32px; }
.et-options { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 9px; max-width: 640px; margin: 0 auto; width: 100%; }
.et-opt { min-height: 52px; font-size: 15px; }

/* 功能總覽 */
.fg-grid { display: flex; flex-direction: column; gap: 12px; max-height: 60vh; overflow-y: auto; }
.fg-sec h3 { display: flex; align-items: center; gap: 8px; font-size: 15px; margin: 4px 0 5px; }
.fg-go { background: none; border: 1px solid var(--accent2); color: var(--accent2); border-radius: 7px; padding: 2px 9px; font-size: 11.5px; cursor: pointer; }
.fg-go:hover { background: rgba(255,180,84,.12); }
.fg-sec ul { margin: 0; padding-left: 18px; }
.fg-sec li { font-size: 13px; line-height: 1.7; color: var(--muted); }
.fg-sec li b { color: var(--accent2); }

/* 瀏覽題庫 */
.tb-bar { display: flex; gap: 8px; margin: 4px 0 8px; flex-wrap: wrap; }
.tb-bar input { flex: 1; min-width: 160px; background: var(--panel2); border: 1px solid var(--border); color: var(--text); border-radius: 9px; padding: 8px 12px; font-size: 14px; }
.tb-bar input:focus { outline: none; border-color: var(--accent2); }
.tb-bar select { background: var(--panel2); border: 1px solid var(--border); color: var(--text); border-radius: 9px; padding: 8px 10px; }
.tb-results { max-height: 56vh; overflow-y: auto; display: flex; flex-direction: column; gap: 10px; }
.tb-card { background: var(--panel2); border: 1px solid var(--border); border-radius: 12px; padding: 11px 13px; }
.tb-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.tb-q { font-weight: 700; font-size: 14px; line-height: 1.6; margin-bottom: 7px; }
.tb-opts { display: flex; flex-direction: column; gap: 3px; margin-bottom: 7px; }
.tb-opt { font-size: 13px; color: var(--muted); padding: 2px 0; }
.tb-opt.ok { color: var(--good); font-weight: 600; }
.tb-exp { font-size: 12.5px; line-height: 1.7; color: var(--text); opacity: .85; border-top: 1px dashed var(--border); padding-top: 7px; }
.tb-card .tv-links { margin-top: 8px; }

/* 知識掌握度儀表板 */
.kd-summary { display: flex; gap: 10px; margin: 4px 0 14px; }
.kd-stat { flex: 1; background: var(--panel2); border: 1px solid var(--border); border-radius: 12px; padding: 10px; text-align: center; }
.kd-stat b { display: block; font-size: 22px; color: var(--accent2); line-height: 1.2; }
.kd-stat span { font-size: 11.5px; color: var(--muted); }
.kd-list { display: flex; flex-direction: column; gap: 7px; max-height: 52vh; overflow-y: auto; }
.kd-row { display: grid; grid-template-columns: 96px 1fr auto auto; align-items: center; gap: 9px; font-size: 12.5px; cursor: pointer; padding: 3px 6px; border-radius: 8px; transition: background .12s; }
.kd-row:hover { background: var(--panel2); }
.kd-cat { color: var(--cc); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.kd-bar { height: 8px; background: var(--panel2); border-radius: 999px; overflow: hidden; }
.kd-fill { height: 100%; border-radius: 999px; transition: width .4s; min-width: 2px; }
.kd-meta { color: var(--muted); white-space: nowrap; font-variant-numeric: tabular-nums; }
.kd-meta i { font-style: normal; opacity: .6; font-size: 10.5px; }
.kd-badge { font-size: 10.5px; padding: 2px 8px; border-radius: 999px; background: var(--panel2); border: 1px solid var(--border); color: var(--muted); white-space: nowrap; }
.kd-badge.good { color: var(--good); border-color: color-mix(in srgb, var(--good) 50%, var(--border)); }
.kd-badge.bad { color: var(--bad); border-color: color-mix(in srgb, var(--bad) 50%, var(--border)); }
@media (max-width: 620px) { .kd-row { grid-template-columns: 78px 1fr auto; } .kd-badge { display: none; } }

.trivia-view { flex: 1; min-height: 0; display: flex; flex-direction: column; padding: 12px 14px; gap: 12px; }
.tv-bar { display: flex; align-items: center; gap: 12px; }
.tv-progress { font-size: 13px; color: var(--muted); }
.tv-score { font-size: 15px; font-weight: 800; color: var(--good); }
.tv-bar .ghost-btn { margin-left: auto; }
.tv-body { flex: 1; min-height: 0; overflow-y: auto; display: flex; flex-direction: column; gap: 14px; }
.tv-cattag { display: flex; align-items: center; gap: 10px; }
.tv-cat { font-size: 13px; font-weight: 700; padding: 4px 12px; border-radius: 999px; background: color-mix(in srgb, var(--cc) 20%, transparent); border: 1px solid var(--cc); }
.tv-diff { color: var(--accent2); font-size: 13px; letter-spacing: 2px; }
.tv-question {
  font-size: clamp(18px, 2.4vw, 24px); font-weight: 700; line-height: 1.5;
  background: linear-gradient(180deg, rgba(255,255,255,.04), transparent); padding: 16px 18px;
  border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: 12px;
}
.tv-options { display: grid; grid-template-columns: 1fr 1fr; gap: 11px; }
.tv-opt {
  display: flex; align-items: center; gap: 11px; text-align: left;
  background: linear-gradient(180deg, rgba(255,255,255,.035), transparent), var(--panel2);
  color: var(--text); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 16px; font-size: 15.5px; transition: all .14s;
}
.tv-opt:hover:not(:disabled) { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 6px 16px rgba(0,0,0,.3); }
.tv-optk {
  flex: none; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center;
  background: var(--panel); border: 1px solid var(--border-hi); font-size: 13px; font-weight: 700; color: var(--muted);
}
.tv-opt:disabled { opacity: .9; }
.tv-opt.chosen { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 18%, transparent); box-shadow: 0 0 0 2px var(--accent) inset; }
.tv-opt.chosen .tv-optk { background: var(--accent); color: #07140c; border-color: var(--accent); }
.tv-opt.correct { background: rgba(62,196,109,.2); border-color: var(--good); }
.tv-opt.correct .tv-optk { background: var(--good); color: #07140c; border-color: var(--good); }
.tv-opt.wrong { background: rgba(232,80,79,.18); border-color: var(--bad); }
.tv-opt.wrong .tv-optk { background: var(--bad); color: #fff; border-color: var(--bad); }

.tv-reveal { animation: popIn .25s cubic-bezier(.2,1.2,.4,1); }
.tv-verdict { font-size: 16px; font-weight: 800; margin-bottom: 11px; }
.tv-verdict.ok { color: var(--good); }
.tv-verdict.no { color: var(--bad); }
.tv-rev-grid { display: grid; grid-template-columns: 1fr auto; gap: 16px; align-items: start; }
.tv-exp { font-size: 14.5px; line-height: 1.8; }
.tv-links { display: flex; gap: 9px; margin-top: 12px; }
.tv-links a {
  color: var(--accent2); text-decoration: none; font-size: 13px;
  border: 1px solid rgba(255,180,84,.4); border-radius: 8px; padding: 6px 13px; transition: background .15s;
}
.tv-links a:hover { background: rgba(255,180,84,.12); }
.tv-ext { margin-top: 7px; align-items: center; }
.tv-ext-label { font-size: 12px; color: var(--muted); margin-right: 2px; }
.tv-ext a { font-size: 12px; border-color: rgba(91,150,255,.4); color: var(--accent); }
.tv-ext a:hover { background: rgba(91,150,255,.12); }
.tv-card { width: 300px; }
.tv-topic { display: inline-block; font-size: 11.5px; color: var(--accent2); border: 1px solid rgba(255,180,84,.4); border-radius: 999px; padding: 2px 10px; margin-bottom: 8px; }
.tv-photo { width: 300px; max-width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--border); filter: drop-shadow(0 8px 22px rgba(0,0,0,.4)); display: block; }
.trivia-card { width: 300px; height: auto; filter: drop-shadow(0 8px 22px rgba(0,0,0,.4)); }
.tv-foot { display: flex; justify-content: flex-end; }
@media (max-width: 760px) {
  .tv-options { grid-template-columns: 1fr; }
  .tv-rev-grid { grid-template-columns: 1fr; }
  .tv-card { width: 100%; max-width: 300px; margin: 0 auto; }
}

/* ========== 導覽列圖示+文字 ========== */
.tab-btn .ti { font-size: 15px; }
.tab-btn .tl { margin-left: 5px; }

/* ========== 和弦指型圖 ========== */
.cd-wrap {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--border);
}
.cd-title { font-size: 12.5px; color: var(--accent2); font-weight: 600; margin-bottom: 4px; }
.chord-diagram { width: 132px; height: auto; display: inline-block; vertical-align: top; }
.chord-diagram .cd-name { fill: var(--text); font-size: 13px; font-weight: 700; }
.chord-diagram .cd-fret { fill: var(--muted); font-size: 11px; }
.chord-diagram .cd-mark { font-size: 13px; }
.chord-diagram .cd-mute { fill: var(--bad); }
.cd-none { color: var(--muted); font-size: 12px; margin-top: 8px; }

/* 設定鎖定（測驗進行中） */
.locked-settings { opacity: .45; pointer-events: none; }

/* ========== 行動裝置（抽屜式側欄） ========== */
@media (max-width: 920px) {
  .menu-btn { display: inline-block; }
  .sidebar {
    position: fixed;
    left: 0;
    top: calc(54px + env(safe-area-inset-top, 0px));
    bottom: 0;
    width: min(86vw, 342px);
    min-width: 0;
    transform: translateX(-105%);
    transition: transform .26s cubic-bezier(.25, .8, .3, 1);
    z-index: 40;
    background: #11141c;
    border-right: 1px solid var(--border-hi);
    padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
    padding-left: calc(12px + env(safe-area-inset-left, 0px));
    box-shadow: 18px 0 50px rgba(0, 0, 0, .55);
  }
  body.drawer-open .sidebar { transform: none; }
  .drawer-back {
    position: fixed;
    inset: 0;
    top: calc(54px + env(safe-area-inset-top, 0px));
    background: rgba(4, 5, 9, .55);
    backdrop-filter: blur(2px);
    z-index: 35;
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s;
  }
  body.drawer-open .drawer-back { display: block; opacity: 1; pointer-events: auto; }
  .main { width: 100%; }
  .board-wrap { padding: 8px 8px 0; }
  .board-scroll { margin: 7px 8px 0; height: 15px; }
  .bottom-panel {
    padding: 10px 10px calc(10px + env(safe-area-inset-bottom, 0px));
    min-height: 0;
    max-height: 42dvh;
    overflow-y: auto;
  }
  .question-text { font-size: 14.5px; }
  .choice-btn { min-width: 88px; padding: 11px 14px; font-size: 14px; flex: 1; }
  .action-row .primary-btn, .action-row .ghost-btn { padding: 9px 12px; font-size: 13px; }
  .dia-box { margin: 8px 8px 0; padding: 8px 10px; overflow-x: auto; }
  .dia-row { flex-wrap: nowrap; width: max-content; }
  .tabs { gap: 3px; }
  .tab-btn { padding: 7px 9px; font-size: 13px; }
  .top-actions .ghost-btn { padding: 7px 10px; font-size: 12px; }
}
/* 手機：分頁改為底部導覽列（標準 App 模式，釋放頂部空間） */
@media (max-width: 560px) {
  .brand b, .brand-sub { display: none; }
  .topbar { gap: 8px; padding-left: calc(10px + env(safe-area-inset-left, 0px)); padding-right: calc(10px + env(safe-area-inset-right, 0px)); }
  .tabs {
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 45; flex: none;
    background: linear-gradient(180deg, rgba(255,255,255,.03), transparent), var(--panel);
    border-top: 1px solid var(--border-hi);
    gap: 1px; justify-content: space-around;
    padding: 5px 3px calc(5px + env(safe-area-inset-bottom, 0px));
    box-shadow: 0 -8px 24px rgba(0,0,0,.4);
  }
  .tab-btn { flex: 1; flex-direction: column; gap: 1px; padding: 5px 1px; border-radius: 9px; }
  .tab-btn .ti { font-size: 19px; }
  .tab-btn .tl { margin-left: 0; font-size: 10px; }
  .layout { height: calc(100dvh - 54px - env(safe-area-inset-top, 0px) - 56px - env(safe-area-inset-bottom, 0px)); }
  .sidebar { bottom: calc(56px + env(safe-area-inset-bottom, 0px)); }
  .drawer-back { bottom: calc(56px + env(safe-area-inset-bottom, 0px)); }
}
/* 橫向版面只在「全螢幕」時啟用（壓縮上下、把高度讓給指板）；
 * 非全螢幕時不做橫向偵測——預設直式使用，避免誤以為打橫＝全螢幕。 */
@media (max-height: 480px) and (min-width: 561px) {
  body.is-fullscreen .topbar { height: calc(46px + env(safe-area-inset-top, 0px)); }
  body.is-fullscreen .layout { height: calc(100dvh - 46px - env(safe-area-inset-top, 0px)); }
  body.is-fullscreen .sidebar { top: calc(46px + env(safe-area-inset-top, 0px)); }
  body.is-fullscreen .drawer-back { top: calc(46px + env(safe-area-inset-top, 0px)); }
  body.is-fullscreen .bottom-panel { max-height: 46dvh; gap: 6px; padding-top: 7px; }
  body.is-fullscreen .question-text { font-size: 13.5px; }
  body.is-fullscreen .choice-btn { padding: 8px 12px; }
  body.is-fullscreen .brand-sub { display: none; }
  body.is-fullscreen .brand-pick { height: 28px; }
}