:root {
  --bg: #07070d;
  --bg-elev: #11111c;
  --bg-card: #16161f;
  --bg-card-2: #1d1d2a;
  --border: #262635;
  --border-strong: #3a3a52;
  --text: #f0f0f8;
  --text-dim: #8a8aa0;
  --text-mute: #5e5e75;

  --accent: #a78bfa;
  --accent-2: #ec4899;
  --grad: linear-gradient(135deg, #a78bfa 0%, #ec4899 100%);
  --grad-soft: linear-gradient(135deg, rgba(167,139,250,0.18) 0%, rgba(236,72,153,0.18) 100%);

  --ok: #34d399;
  --ok-bg: rgba(52, 211, 153, 0.12);
  --warn: #fbbf24;
  --warn-bg: rgba(251, 191, 36, 0.12);
  --bad: #f87171;
  --bad-bg: rgba(248, 113, 113, 0.12);

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --tnum: 'tnum' 1, 'cv11' 1;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  background:
    radial-gradient(900px 600px at 85% -10%, rgba(167,139,250,0.10), transparent 60%),
    radial-gradient(700px 500px at -10% 110%, rgba(236,72,153,0.08), transparent 60%),
    var(--bg);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: 'cv11' 1;
  min-height: 100vh;
}
body { padding-bottom: env(safe-area-inset-bottom); }

/* ===== Header ===== */
.hdr {
  position: sticky; top: 0; z-index: 10;
  background: rgba(7, 7, 13, 0.75);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px 0;
}
.hdr-title {
  font-size: 18px; font-weight: 700; letter-spacing: -0.2px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  color: transparent; display: inline-block;
}
.tabs { display: flex; gap: 2px; margin-top: 14px; }
.tab {
  background: none; border: none; color: var(--text-dim);
  padding: 12px 16px; font-size: 14px; font-weight: 600; cursor: pointer;
  border-bottom: 2px solid transparent; font-family: inherit;
  transition: color 0.2s, border-color 0.2s;
  letter-spacing: -0.1px;
}
.tab:hover { color: var(--text); }
.tab.active {
  color: var(--text);
  border-image: var(--grad) 1;
  border-bottom: 2px solid;
}

/* ===== Panels ===== */
.tab-panel { display: none; animation: fade-up 0.35s ease both; }
.tab-panel.active { display: block; }
.container { max-width: 760px; margin: 0 auto; padding: 28px 24px 100px; }

@keyframes fade-up {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes pop-in {
  0%   { opacity: 0; transform: scale(0.96) translateY(4px); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

/* Day head */
.day-head { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 18px; gap: 14px; flex-wrap: wrap; }
.day-actions { display: flex; gap: 10px; align-items: center; }

/* Unit toggle (kg / lb) */
.unit-toggle {
  display: inline-flex; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: 10px; padding: 3px;
}
.ut-btn {
  background: none; border: none; padding: 6px 12px; font-size: 12px;
  color: var(--text-dim); cursor: pointer; border-radius: 7px;
  font-weight: 700; font-family: inherit; letter-spacing: 0.3px;
  transition: all 0.15s;
}
.ut-btn:hover { color: var(--text); }
.ut-btn.active {
  background: var(--grad); color: white;
  box-shadow: 0 2px 8px rgba(167, 139, 250, 0.35);
}

/* Hint shown next to weight input when lb mode is active */
.set-row .lb-hint {
  font-size: 10px; color: var(--text-mute); margin-top: 2px;
  font-variant-numeric: tabular-nums;
}
h2 { font-size: 26px; font-weight: 700; letter-spacing: -0.5px; }
h3 { font-size: 16px; font-weight: 600; margin-bottom: 14px; }

/* Today stats bar */
.stat-bar {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
  margin-bottom: 22px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--grad);
}
.stat-label {
  font-size: 11px; color: var(--text-mute);
  text-transform: uppercase; letter-spacing: 0.8px; font-weight: 600;
}
.stat-value {
  font-size: 24px; font-weight: 700; margin-top: 4px;
  letter-spacing: -0.5px;
  font-variant-numeric: tabular-nums;
}
.stat-value.accent { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ===== Readiness widget (Garmin biometrics) ===== */
.readiness-widget {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 14px; padding: 14px 16px;
  margin-bottom: 22px;
}
.readiness-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px; gap: 12px;
}
.readiness-title { margin: 0; font-size: 14px; font-weight: 600; letter-spacing: -0.2px; }
.readiness-meta { font-size: 11px; color: var(--text-mute); margin-top: 2px; }
.readiness-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px;
}
.readiness-card {
  background: var(--bg-card-2); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px 8px;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
}
.r-label {
  font-size: 10px; color: var(--text-mute);
  text-transform: uppercase; letter-spacing: 0.6px; font-weight: 600;
}
.r-value {
  font-size: 22px; font-weight: 700;
  font-variant-numeric: tabular-nums; letter-spacing: -0.5px;
}
.r-unit { font-size: 10px; color: var(--text-mute); }

#btn-sync-garmin { display: inline-flex; align-items: center; gap: 6px; padding: 8px 12px; }
#btn-sync-garmin:disabled { opacity: 0.6; cursor: wait; }
.sync-icon { display: inline-block; }
#btn-sync-garmin.syncing .sync-icon { animation: po-spin 0.9s linear infinite; }
@keyframes po-spin { to { transform: rotate(360deg); } }

.recovery-factor {
  margin-top: 10px; padding: 8px 12px; border-radius: 8px;
  font-size: 12px; font-weight: 600; letter-spacing: -0.1px;
}
.recovery-factor.neutral { background: rgba(255,255,255,0.04); color: var(--text-dim); }
.recovery-factor.good    { background: var(--ok-bg);  color: var(--ok); }
.recovery-factor.bad     { background: var(--bad-bg); color: var(--bad); }

/* ===== Buttons ===== */
.btn-ghost, .btn-primary {
  border: none; cursor: pointer; font-family: inherit; font-weight: 600;
  border-radius: 10px; padding: 11px 16px; font-size: 14px;
  transition: all 0.18s;
  letter-spacing: -0.1px;
}
.btn-ghost {
  background: var(--bg-card); color: var(--text-dim);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  color: var(--text); border-color: var(--border-strong); background: var(--bg-card-2);
}
.btn-primary {
  background: var(--grad); color: white;
  box-shadow: 0 4px 14px rgba(167, 139, 250, 0.35);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(167, 139, 250, 0.5); }
.btn-sm { padding: 7px 12px; font-size: 13px; }

select, input[type="text"], input[type="number"] {
  background: var(--bg-elev); color: var(--text); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px 12px; font-size: 14px; font-family: inherit;
  outline: none; transition: border-color 0.15s, box-shadow 0.15s;
  font-variant-numeric: tabular-nums;
}
select:focus, input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.15);
}

/* ===== Exercise card ===== */
.ex-list { display: flex; flex-direction: column; gap: 16px; }
.ex-card {
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-card-2) 100%);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  position: relative;
  overflow: hidden;
  animation: pop-in 0.3s ease both;
}
.ex-card::after {
  content: ''; position: absolute; inset: 0; border-radius: 16px; pointer-events: none;
  padding: 1px;
  background: linear-gradient(180deg, rgba(255,255,255,0.05), transparent 40%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
}

.ex-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 14px; }
.ex-name { font-size: 18px; font-weight: 700; letter-spacing: -0.3px; }
.ex-group {
  display: inline-block; font-size: 10px; font-weight: 700; letter-spacing: 0.8px;
  text-transform: uppercase; color: var(--accent);
  background: rgba(167, 139, 250, 0.12);
  padding: 2px 7px; border-radius: 4px; margin-top: 4px;
  margin-right: 4px;
}
.equip-chip {
  display: inline-block; font-size: 10px; font-weight: 700; letter-spacing: 0.4px;
  padding: 2px 7px; border-radius: 4px; margin-top: 4px;
  border: 1px solid transparent;
}
.equip-chip.barbell    { color: #fb923c; background: rgba(251,146,60,0.10);  border-color: rgba(251,146,60,0.25);  }
.equip-chip.dumbbell   { color: #60a5fa; background: rgba(96,165,250,0.10);  border-color: rgba(96,165,250,0.25);  }
.equip-chip.cable      { color: #22d3ee; background: rgba(34,211,238,0.10);  border-color: rgba(34,211,238,0.25);  }
.equip-chip.machine    { color: #c084fc; background: rgba(192,132,252,0.10); border-color: rgba(192,132,252,0.25); }
.equip-chip.bodyweight { color: #4ade80; background: rgba(74,222,128,0.10);  border-color: rgba(74,222,128,0.25);  }
.ex-del {
  background: none; border: 1px solid transparent; color: var(--text-mute);
  cursor: pointer; font-size: 16px; padding: 6px 10px; border-radius: 8px;
  transition: all 0.15s;
}
.ex-del:hover { color: var(--bad); border-color: var(--bad-bg); background: var(--bad-bg); }

/* Hero top-set display */
.ex-hero {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 16px; padding: 14px 0 16px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 14px;
}
.hero-now { display: flex; flex-direction: column; gap: 2px; }
.hero-label { font-size: 10px; color: var(--text-mute); letter-spacing: 0.8px; text-transform: uppercase; font-weight: 600; }
.hero-value {
  font-size: 36px; font-weight: 800; letter-spacing: -1.2px; line-height: 1;
  font-variant-numeric: tabular-nums;
  display: flex; align-items: baseline; gap: 4px;
}
.hero-value .unit { font-size: 14px; font-weight: 500; color: var(--text-dim); letter-spacing: 0; }
.hero-value .x { font-size: 20px; font-weight: 600; color: var(--text-dim); margin: 0 4px; }
.hero-value.placeholder { color: var(--text-mute); }

.hero-delta {
  text-align: right; display: flex; flex-direction: column; gap: 4px; align-items: flex-end;
}
.po-badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 5px 10px; border-radius: 999px; font-size: 12px; font-weight: 700;
  letter-spacing: -0.1px;
}
.po-badge.ok { background: var(--ok-bg); color: var(--ok); box-shadow: inset 0 0 0 1px rgba(52,211,153,0.25); }
.po-badge.same { background: var(--warn-bg); color: var(--warn); box-shadow: inset 0 0 0 1px rgba(251,191,36,0.25); }
.po-badge.down { background: var(--bad-bg); color: var(--bad); box-shadow: inset 0 0 0 1px rgba(248,113,113,0.25); }
.po-badge.first { background: var(--grad-soft); color: var(--accent); box-shadow: inset 0 0 0 1px rgba(167,139,250,0.25); }
.delta-text { font-size: 11px; color: var(--text-dim); font-variant-numeric: tabular-nums; }

.ex-prev {
  font-size: 12px; color: var(--text-dim);
  background: rgba(255,255,255,0.03); border-radius: 8px;
  padding: 9px 12px; margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
  border: 1px solid var(--border);
}
.ex-prev .prev-label { color: var(--text-mute); margin-right: 6px; }

.sets-grid { display: grid; grid-template-columns: 28px 1fr 1fr auto; gap: 8px 12px; align-items: center; }
.sets-grid > .col-h { font-size: 10px; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.8px; padding-bottom: 4px; font-weight: 700; }
.set-num {
  color: var(--text-mute); font-size: 12px; text-align: center; font-weight: 700;
  font-variant-numeric: tabular-nums;
  background: rgba(255,255,255,0.04); border-radius: 6px; padding: 6px 0;
}
.set-row input { width: 100%; padding: 8px 10px; font-size: 15px; font-weight: 600; }
.set-row input::placeholder { color: var(--text-mute); font-weight: 400; }
.set-del {
  background: transparent; border: 1px solid var(--border); color: var(--text-mute);
  cursor: pointer; padding: 0; font-size: 18px; line-height: 1; border-radius: 8px;
  transition: all 0.15s; width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  font-family: inherit;
}
.set-del:hover {
  color: var(--bad); border-color: var(--bad-bg); background: var(--bad-bg);
}

/* drop set 視覺：縮排 + 較淡 + ↓ 標記 */
.set-num.drop { background: rgba(167, 139, 250, 0.08); color: var(--accent); font-weight: 800; }
.set-row.drop input {
  background: rgba(167, 139, 250, 0.06);
  color: var(--text-dim);
  border-color: rgba(167, 139, 250, 0.18);
}

.add-set-row { display: flex; gap: 8px; margin-top: 14px; }
.btn-add-set { flex: 1; }
.btn-add-drop {
  flex: 0 0 auto; padding: 11px 14px;
  background: rgba(167, 139, 250, 0.08);
  color: var(--accent);
  border: 1px solid rgba(167, 139, 250, 0.25);
}
.btn-add-drop:hover {
  background: rgba(167, 139, 250, 0.16);
  border-color: rgba(167, 139, 250, 0.4);
}

/* superset：用 supersetGroup 算出 hue，所有屬於同 group 的卡片共用左側 4px 色條 */
.ex-card.in-superset {
  border-left: 4px solid hsl(var(--super-hue, 280), 70%, 60%);
  padding-left: 14px;  /* 16px - 4px border 補回視覺空間 */
}
.ex-card.in-superset:not(.superset-head) { margin-top: -8px; border-top-left-radius: 0; border-top-right-radius: 0; }
.ex-card.in-superset:not(.superset-tail) { border-bottom-left-radius: 0; border-bottom-right-radius: 0; margin-bottom: 0; }
.superset-chip {
  display: inline-block; font-size: 10px; font-weight: 700; letter-spacing: 0.6px;
  text-transform: uppercase;
  color: hsl(var(--super-hue, 280), 70%, 70%);
  background: hsl(var(--super-hue, 280), 70%, 60%, 0.12);
  padding: 2px 7px; border-radius: 4px; margin-top: 4px; margin-right: 4px;
}
.ex-head-actions { display: flex; gap: 6px; align-items: flex-start; }
.ex-super-toggle {
  background: transparent; border: 1px solid var(--border); color: var(--text-dim);
  font-size: 11px; font-weight: 600; padding: 4px 8px; border-radius: 6px;
  cursor: pointer; font-family: inherit; white-space: nowrap;
  transition: all 0.15s;
}
.ex-super-toggle:hover:not(:disabled) { color: var(--accent); border-color: var(--accent); }
.ex-super-toggle.on { color: var(--accent); border-color: var(--accent); background: rgba(167,139,250,0.08); }
.ex-super-toggle:disabled { opacity: 0.35; cursor: not-allowed; }

/* ===== Add exercise ===== */
.add-ex {
  display: flex; gap: 8px; margin-top: 22px; align-items: center;
  padding: 14px; background: var(--bg-card); border: 1px dashed var(--border-strong);
  border-radius: 12px;
}
.add-ex select { flex: 1; }

.empty-hint {
  text-align: center; color: var(--text-dim); padding: 56px 20px 32px; font-size: 14px;
}
.empty-hint::before {
  content: '🏋️'; display: block; font-size: 48px; margin-bottom: 14px; opacity: 0.5;
}

/* ===== Fatigue ===== */
.fatigue-stage {
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-card-2) 100%);
  border: 1px solid var(--border); border-radius: 16px;
  padding: 12px;
  margin-bottom: 14px;
}
.fatigue-stage .anatomy-canvas {
  width: 100%; height: 380px;
  border-radius: 12px;
  cursor: grab;
  background: radial-gradient(circle at 50% 60%, rgba(167,139,250,0.08), transparent 60%), var(--bg);
  overflow: hidden;
}
.fatigue-stage .anatomy-canvas:active { cursor: grabbing; }

.fatigue-legend {
  display: flex; gap: 16px; align-items: center; justify-content: center;
  font-size: 12px; color: var(--text-dim);
  margin: 10px 0 18px;
  flex-wrap: wrap;
}
.lg-dot {
  display: inline-block; width: 10px; height: 10px; border-radius: 50%;
  margin-right: 4px; vertical-align: middle;
}

.fatigue-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
}
.fatigue-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 12px; padding: 12px 14px;
  position: relative; overflow: hidden;
  display: flex; flex-direction: column; gap: 6px;
}
.fatigue-card::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: var(--fatigue-color, #34d399);
}
.fat-row1 {
  display: flex; justify-content: space-between; align-items: baseline; gap: 8px;
}
.fat-name { font-size: 14px; font-weight: 700; }
.fat-pct {
  font-size: 16px; font-weight: 800; letter-spacing: -0.3px;
  font-variant-numeric: tabular-nums;
  color: var(--fatigue-color, var(--text));
}
.fat-rec {
  font-size: 11px; font-weight: 700;
  display: inline-block; padding: 2px 7px; border-radius: 4px;
  align-self: flex-start;
}
.fat-rec.ok   { background: rgba(52,211,153,0.14); color: #34d399; }
.fat-rec.mid  { background: rgba(251,191,36,0.14); color: #fbbf24; }
.fat-rec.high { background: rgba(248,113,113,0.14); color: #f87171; }
.fat-rec.max  { background: rgba(248,113,113,0.22); color: #fca5a5; }
.fat-meta { font-size: 11px; color: var(--text-mute); font-variant-numeric: tabular-nums; }

@media (max-width: 600px) {
  .fatigue-stage .anatomy-canvas { height: 320px; }
  .fatigue-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
  .fatigue-card { padding: 10px 12px; }
  .readiness-grid { grid-template-columns: repeat(2, 1fr); }
  .r-value { font-size: 18px; }
}

/* ===== 3D Anatomy ===== */
.anatomy-section {
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-card-2) 100%);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 22px;
}
.anatomy-header { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 12px; }
.anatomy-hint { font-size: 11px; color: var(--text-mute); letter-spacing: 0.3px; margin-top: 4px; }
.anatomy-body {
  position: relative;
  display: block;
}
.anatomy-body.collapsed { display: none; }
.anatomy-canvas {
  width: 100%;
  height: 380px;
  border-radius: 12px;
  cursor: grab;
  background:
    radial-gradient(circle at 50% 60%, rgba(167,139,250,0.10), transparent 60%),
    var(--bg);
  overflow: hidden;
}
.anatomy-canvas:active { cursor: grabbing; }
.anatomy-canvas canvas { display: block; }

.muscle-panel {
  margin-top: 12px;
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  padding: 14px;
  animation: fade-up 0.25s ease both;
}
.muscle-panel-head {
  display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px;
}
#muscle-title {
  font-weight: 700; font-size: 14px; letter-spacing: -0.1px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.muscle-panel-close {
  background: none; border: none; color: var(--text-mute); cursor: pointer;
  font-size: 14px; padding: 4px 8px; border-radius: 6px;
}
.muscle-panel-close:hover { color: var(--text); background: var(--bg-card); }
.muscle-list { display: flex; flex-wrap: wrap; gap: 8px; }
.muscle-ex-btn {
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text); padding: 9px 14px; border-radius: 10px; cursor: pointer;
  font-family: inherit; font-size: 13px; font-weight: 600;
  display: inline-flex; align-items: center; gap: 8px;
  transition: all 0.15s;
}
.muscle-ex-btn:hover {
  border-color: var(--accent); background: var(--bg-card-2);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(167, 139, 250, 0.18);
}
.muscle-ex-btn .plus {
  color: var(--accent); font-weight: 700; font-size: 16px;
  width: 18px; height: 18px; display: inline-flex; align-items: center; justify-content: center;
  background: rgba(167, 139, 250, 0.12); border-radius: 50%;
}

/* ===== History ===== */
.hist-list { display: flex; flex-direction: column; gap: 12px; }
.hist-card {
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-card-2) 100%);
  border: 1px solid var(--border); border-radius: 14px;
  padding: 16px 18px;
  animation: pop-in 0.3s ease both;
}
.hist-date {
  font-size: 13px; color: var(--text-dim); margin-bottom: 10px;
  display: flex; align-items: center; gap: 8px; font-weight: 600;
}
.hist-date .today-pill {
  background: var(--grad); color: white;
  font-size: 10px; font-weight: 700; letter-spacing: 0.5px;
  padding: 2px 8px; border-radius: 999px;
}
.hist-ex-list { display: flex; flex-direction: column; gap: 8px; font-size: 14px; }
.hist-ex-row {
  display: flex; justify-content: space-between; gap: 8px; align-items: center;
  padding: 6px 0;
}
.hist-ex-row + .hist-ex-row { border-top: 1px solid var(--border); }
.hist-ex-row .name { color: var(--text); font-weight: 500; }
.hist-ex-row .vol { color: var(--text-dim); font-size: 12px; font-variant-numeric: tabular-nums; letter-spacing: -0.2px; }

.data-actions { display: flex; gap: 10px; margin-top: 28px; justify-content: center; }

/* ===== Rep-Max records ===== */
.rm-subtitle { font-size: 13px; color: var(--text-dim); margin-top: 4px; }
.rm-reps-toggle {
  display: inline-flex; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: 10px; padding: 3px;
}
.rt-btn {
  background: none; border: none; padding: 7px 12px; font-size: 12px;
  color: var(--text-dim); cursor: pointer; border-radius: 7px;
  font-weight: 700; font-family: inherit; letter-spacing: 0.3px;
  transition: all 0.15s;
}
.rt-btn:hover { color: var(--text); }
.rt-btn.active {
  background: var(--grad); color: white;
  box-shadow: 0 2px 8px rgba(167, 139, 250, 0.35);
}

.rm-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.rm-card {
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-card-2) 100%);
  border: 1px solid var(--border); border-radius: 14px;
  padding: 16px;
  position: relative; overflow: hidden;
  animation: pop-in 0.3s ease both;
}
.rm-card::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--grad);
}
.rm-card-head {
  display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; margin-bottom: 10px;
}
.rm-name { font-size: 15px; font-weight: 700; letter-spacing: -0.2px; }
.rm-group {
  display: inline-block; font-size: 10px; font-weight: 700; letter-spacing: 0.6px;
  text-transform: uppercase; color: var(--accent);
  background: rgba(167, 139, 250, 0.12);
  padding: 2px 6px; border-radius: 4px; margin-top: 3px;
}
.rm-weight {
  font-size: 32px; font-weight: 800; letter-spacing: -1px;
  font-variant-numeric: tabular-nums; line-height: 1;
  margin: 4px 0 10px;
  display: flex; align-items: baseline; gap: 3px;
}
.rm-weight .unit { font-size: 13px; font-weight: 500; color: var(--text-dim); letter-spacing: 0; }
.rm-meta {
  display: flex; justify-content: space-between; gap: 8px;
  font-size: 11px; color: var(--text-mute); letter-spacing: 0.2px;
  font-variant-numeric: tabular-nums;
}
.rm-meta .count { color: var(--text-dim); }

/* ===== Chart ===== */
.chart-controls { display: flex; gap: 16px; margin-bottom: 18px; flex-wrap: wrap; }
.chart-controls label { font-size: 12px; color: var(--text-mute); display: flex; flex-direction: column; gap: 6px; text-transform: uppercase; letter-spacing: 0.6px; font-weight: 700; }
.chart-wrap {
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-card-2) 100%);
  border: 1px solid var(--border); border-radius: 16px; padding: 20px;
  min-height: 360px;
}

/* ===== Modal ===== */
.modal-bg {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center; z-index: 100;
  padding: 20px;
  animation: fade-up 0.2s ease both;
}
.modal-bg[hidden] { display: none; }
.modal {
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-card-2) 100%);
  border: 1px solid var(--border-strong); border-radius: 16px;
  padding: 22px; width: 100%; max-width: 380px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
.modal h3 { margin-bottom: 16px; }
.modal input { width: 100%; margin-bottom: 16px; padding: 12px 14px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; }

/* ===== 自訂動作管理 modal ===== */
.modal-customs { max-width: 520px; max-height: 85vh; display: flex; flex-direction: column; }
.modal-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 14px;
}
.modal-head h3 { margin: 0; }
.modal-close {
  background: transparent; border: none; color: var(--text-dim);
  cursor: pointer; font-size: 18px; padding: 4px 8px; border-radius: 6px;
}
.modal-close:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.modal-subhead {
  font-size: 12px; color: var(--text-mute); text-transform: uppercase;
  letter-spacing: 0.8px; margin: 16px 0 10px; font-weight: 700;
}
.custom-list {
  display: flex; flex-direction: column; gap: 8px;
  max-height: 35vh; overflow-y: auto; padding-right: 4px;
}
.custom-empty {
  text-align: center; color: var(--text-mute); padding: 20px;
  font-size: 13px;
  border: 1px dashed var(--border); border-radius: 10px;
}
.custom-row {
  display: flex; justify-content: space-between; align-items: center;
  gap: 10px; padding: 10px 12px;
  background: var(--bg-card-2); border: 1px solid var(--border); border-radius: 10px;
}
.custom-row-main { flex: 1; min-width: 0; }
.custom-name { display: block; font-weight: 600; margin-bottom: 4px; }
.custom-chips { display: flex; gap: 4px; flex-wrap: wrap; }
.custom-chip {
  display: inline-block; font-size: 10px; font-weight: 600; letter-spacing: 0.4px;
  padding: 2px 6px; border-radius: 4px;
  background: rgba(255,255,255,0.06); color: var(--text-dim);
}
.custom-chip.kind-isometric { color: #c084fc; background: rgba(192,132,252,0.12); }
.custom-chip.kind-bodyweight { color: #4ade80; background: rgba(74,222,128,0.12); }
.custom-chip.kind-strength { color: #fb923c; background: rgba(251,146,60,0.12); }
.custom-del {
  background: transparent; border: 1px solid var(--border); color: var(--text-mute);
  cursor: pointer; padding: 0; width: 30px; height: 30px; border-radius: 8px;
  font-size: 14px; line-height: 1; display: inline-flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.custom-del:hover { color: var(--bad); border-color: var(--bad); background: var(--bad-bg); }

.custom-form input { margin-bottom: 10px; }
.custom-form-row {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 14px;
}
.form-field { display: flex; flex-direction: column; gap: 4px; }
.form-label { font-size: 11px; color: var(--text-mute); font-weight: 600; letter-spacing: 0.4px; }
.custom-form select { width: 100%; padding: 9px 10px; }

/* sets-grid 變體：isometric / bodyweight 只有 3 欄 */
.sets-grid-iso { grid-template-columns: 28px 1fr auto; }
.sets-grid-bw  { grid-template-columns: 28px 1fr auto; }

@media (max-width: 600px) {
  .custom-form-row { grid-template-columns: 1fr; gap: 8px; }
}

/* ===== Mobile (≤ 600px) ===== */
@media (max-width: 600px) {
  .container { padding: 18px 14px 80px; }
  .hdr { padding: 12px 14px 0; }
  .hdr-title { font-size: 16px; }
  .tab { padding: 11px 10px; font-size: 13px; }
  h2 { font-size: 22px; }
  h3 { font-size: 15px; }

  /* Day head: 標題一行，操作另一行 */
  .day-head { flex-direction: column; align-items: stretch; gap: 10px; }
  .day-actions { width: 100%; justify-content: space-between; gap: 8px; }
  .ut-btn { padding: 7px 14px; }

  /* Stat bar */
  .stat-bar { gap: 6px; margin-bottom: 18px; }
  .stat-card { padding: 10px 11px; border-radius: 10px; }
  .stat-label { font-size: 10px; letter-spacing: 0.5px; }
  .stat-value { font-size: 18px; }

  /* Anatomy section */
  .anatomy-section { padding: 12px; margin-bottom: 18px; border-radius: 14px; }
  .anatomy-header { gap: 10px; }
  .anatomy-canvas { height: 320px; border-radius: 10px; }
  .muscle-panel { padding: 12px; }
  .muscle-ex-btn { padding: 8px 12px; font-size: 12px; }

  /* Exercise card */
  .ex-card { padding: 14px; border-radius: 14px; }
  .ex-name { font-size: 16px; }
  .hero-value { font-size: 28px; letter-spacing: -1px; }
  .hero-value .unit { font-size: 12px; }
  .hero-value .x { font-size: 16px; }
  .ex-hero { padding: 12px 0 12px; gap: 10px; }
  .ex-prev { font-size: 11px; padding: 8px 10px; }
  .sets-grid { grid-template-columns: 26px 1fr 1fr auto; gap: 8px 6px; }
  .set-row input { font-size: 16px; padding: 8px 8px; } /* 16px 防 iOS Safari 縮放 */

  /* Modal */
  .modal { padding: 18px; }
}

/* ===== Narrow phones (≤ 380px) ===== */
@media (max-width: 380px) {
  .stat-value { font-size: 16px; }
  .hero-value { font-size: 24px; }
  .anatomy-canvas { height: 300px; }
  .tab { padding: 11px 8px; }
}

/* ===== Touch / no-hover devices ===== */
@media (hover: none) {
  .btn-primary:hover { transform: none; box-shadow: 0 4px 14px rgba(167, 139, 250, 0.35); }
  .muscle-ex-btn:hover { transform: none; box-shadow: none; }
}

/* Three.js canvas — 讓 Three.js OrbitControls 完全接管 touch 手勢（單指旋轉、雙指 zoom）。
   注意：canvas 區內無法滾頁面，使用者要捲動請在 canvas 外滑動。 */
.anatomy-canvas canvas { touch-action: none; }