/* ---------- Tokens ---------- */
:root {
  --bg: #f6f5f1;
  --surface: #ffffff;
  --surface-2: #efede8;
  --text: #1c1c20;
  --muted: #5e6068;
  --line: #e2dfd8;
  --accent: #d9531e;
  --accent-soft: #fbe6dc;
  --on-accent: #ffffff;
  --ok: #1f8a4c;
  --ok-soft: #dcf2e4;
  --anchor: #2563eb;
  --board-line: #8a8c93;
  --chart-line: #d9531e;
  --radius: 16px;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.04), 0 4px 16px rgb(0 0 0 / 0.05);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --tabbar-h: 64px;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #111214; --surface: #1a1b1f; --surface-2: #24262b; --text: #ececef; --muted: #a3a6ae;
  --line: #2d3036; --accent: #ff7a45; --accent-soft: #3a2219; --on-accent: #1a0d07;
  --ok: #4cc882; --ok-soft: #173325; --anchor: #6ea0ff; --board-line: #6d7079; --chart-line: #e8602a;
  --shadow: none; color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111214; --surface: #1a1b1f; --surface-2: #24262b; --text: #ececef; --muted: #a3a6ae;
    --line: #2d3036; --accent: #ff7a45; --accent-soft: #3a2219; --on-accent: #1a0d07;
    --ok: #4cc882; --ok-soft: #173325; --anchor: #6ea0ff; --board-line: #6d7079; --chart-line: #e8602a;
    --shadow: none; color-scheme: dark;
  }
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.55 var(--font); -webkit-font-smoothing: antialiased;
  padding-bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom) + 24px);
}
body.no-tabs { padding-bottom: 32px; }
body.no-tabs .tabbar { display: none; }
.view { max-width: 720px; margin: 0 auto; padding: 8px max(16px, env(safe-area-inset-left)) 0; outline: none; }
h1, h2 { line-height: 1.15; letter-spacing: -0.02em; }
h1 { font-size: clamp(1.7rem, 6vw, 2.4rem); margin: 0 0 8px; }
h2 { font-size: 1.25rem; margin: 0 0 10px; }
a { color: var(--accent); }
p { margin: 0 0 12px; }
.muted { color: var(--muted); }
.small { font-size: 0.875rem; }
.center { text-align: center; justify-content: center; }
.eyebrow { font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 0 0 4px; }
.lead { font-size: 1.1rem; color: var(--muted); }
button, select, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 20; background: var(--surface); padding: 8px 12px; border-radius: 8px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.noscript { padding: 24px; text-align: center; }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; margin: 0 0 14px; }
.section { padding-top: 14px; }
.page-head { padding: 14px 0 8px; }
.back { display: inline-block; margin: 6px 0 2px; text-decoration: none; font-weight: 600; font-size: 0.95rem; padding: 6px 0; }
.note-box { background: var(--accent-soft); border-radius: 12px; padding: 12px 14px; font-size: 0.92rem; }
.plain { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.stack { display: grid; gap: 10px; }

/* ---------- Top bar & tab bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 8px;
  padding: max(8px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) 8px max(16px, env(safe-area-inset-left));
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--text); text-decoration: none; }
.brand img { border-radius: 7px; }
.topbar-day { margin-left: auto; font-size: 0.85rem; font-weight: 600; color: var(--muted); }
.icon-btn {
  display: inline-grid; place-items: center; width: 40px; height: 40px; flex: none;
  border: 1px solid var(--line); border-radius: 12px; background: var(--surface); color: var(--text); text-decoration: none;
}
.icon-btn svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.icon-btn.round { border-radius: 50%; width: 44px; height: 44px; font-size: 1.4rem; font-weight: 600; }
.icon-btn.sm { width: 36px; height: 36px; font-size: 0.95rem; }
.icon-moon { display: none; }
:root[data-theme="dark"] .icon-sun { display: none; }
:root[data-theme="dark"] .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun { display: none; }
  :root:not([data-theme="light"]) .icon-moon { display: block; }
}

.tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 10;
  display: grid; grid-template-columns: repeat(5, 1fr);
  padding: 6px max(8px, env(safe-area-inset-left)) calc(6px + env(safe-area-inset-bottom));
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
}
.tabbar a {
  display: flex; flex-direction: column; align-items: center; gap: 2px; min-height: 50px; justify-content: center;
  color: var(--muted); text-decoration: none; font-size: 0.7rem; font-weight: 600; border-radius: 12px;
}
.tabbar svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.tabbar a[aria-current] { color: var(--accent); }
@media (min-width: 760px) {
  .tabbar { left: 50%; right: auto; transform: translateX(-50%); width: 560px; bottom: 16px; border: 1px solid var(--line); border-radius: 20px; padding: 6px; box-shadow: 0 8px 30px rgb(0 0 0 / 0.12); }
}

/* ---------- Buttons, chips, fields ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; text-align: center;
  min-height: 46px; padding: 8px 18px; border: 1px solid var(--line); border-radius: 999px;
  background: var(--surface-2); font-weight: 600; color: var(--text); text-decoration: none;
  transition: background 0.15s, transform 0.1s;
}
.btn:active { transform: scale(0.97); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn.active { background: var(--text); border-color: var(--text); color: var(--bg); }
.btn.danger { color: #c2362b; }
.btn.wide { width: 100%; margin: 6px 0; }
.btn.small-btn { min-height: 38px; padding: 4px 14px; font-size: 0.9rem; }
.btn.suggested { box-shadow: 0 0 0 3px var(--accent-soft); border-color: var(--accent); }
.btn[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 8px 0; }
.link-btn { background: none; border: 0; padding: 0; color: var(--accent); text-decoration: underline; font-weight: 600; }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 12px; }
.chip {
  min-width: 52px; min-height: 44px; padding: 0 14px; display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid var(--line); border-radius: 12px; background: var(--surface); font-weight: 700;
}
.chip.small { min-height: 34px; min-width: 0; padding: 0 12px; font-size: 0.85rem; }
.chip[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.chip .pb { font-weight: 500; opacity: 0.7; }
.field { display: inline-flex; flex-direction: column; gap: 4px; font-size: 0.85rem; color: var(--muted); font-weight: 600; margin: 4px 8px 8px 0; }
select, textarea {
  min-height: 44px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface-2); color: var(--text); font-weight: 600;
}
textarea { width: 100%; font: 0.8rem/1.4 ui-monospace, Menlo, monospace; resize: vertical; }
.check-row { display: flex; align-items: center; gap: 10px; min-height: 44px; font-size: 0.95rem; }
.check-row input, .plan-item input, .checklist input { width: 22px; height: 22px; accent-color: var(--accent); flex: none; }
.seg { display: inline-flex; background: var(--surface-2); border-radius: 12px; padding: 3px; gap: 2px; }
.seg button, .seg a { border: 0; background: none; border-radius: 9px; padding: 6px 10px; font-weight: 700; font-size: 0.85rem; color: var(--muted); text-decoration: none; text-align: center; }
.seg [aria-checked="true"], .seg [aria-selected="true"] { background: var(--surface); color: var(--text); box-shadow: 0 1px 3px rgb(0 0 0 / 0.12); }
.wide-seg { display: grid; grid-template-columns: repeat(3, 1fr); width: 100%; margin-bottom: 14px; }
.wide-seg a { padding: 10px 4px; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom) + 20px); z-index: 30;
  transform: translate(-50%, 20px); opacity: 0; pointer-events: none;
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 999px; font-weight: 600; font-size: 0.9rem;
  transition: opacity 0.2s, transform 0.2s; max-width: calc(100% - 32px); text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- Stats & streak ---------- */
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 20px; }
.stat { display: flex; flex-direction: column; }
.stat-num { font-size: 2rem; font-weight: 800; line-height: 1.1; font-variant-numeric: tabular-nums; }
.flame { font-size: 1.4rem; margin-left: 4px; }
.stat-label { color: var(--muted); font-size: 0.85rem; }
.today-note { grid-column: 1 / -1; margin: 0; }
.progress-bar { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; margin: -4px 0 14px; }
.progress-bar span { display: block; height: 100%; width: 0; background: var(--accent); border-radius: inherit; transition: width 0.4s; }
.link-card { display: flex; align-items: center; justify-content: space-between; gap: 12px; color: var(--text); text-decoration: none; }

/* ---------- Today plan ---------- */
.plan { list-style: none; padding: 4px 0; }
.plan-item { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--line); }
.plan-item:last-child { border-bottom: 0; }
.plan-text { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.plan-block { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--accent); }
.plan-title { font-weight: 650; line-height: 1.3; }
.plan-detail { line-height: 1.35; margin-top: 2px; }
.plan-item.checked .plan-title { text-decoration: line-through; color: var(--muted); }
.plan-item.checked .plan-block { color: var(--ok); }

/* ---------- Path ---------- */
.phase { padding: 0; overflow: hidden; }
.phase summary { display: flex; align-items: center; gap: 12px; padding: 14px 16px; cursor: pointer; list-style: none; }
.phase summary::-webkit-details-marker { display: none; }
.phase-head { flex: 1; display: flex; flex-direction: column; }
.phase-title { font-weight: 750; }
.phase-title small { color: var(--muted); font-weight: 500; margin-left: 4px; }
.phase-sub { font-size: 0.88rem; color: var(--muted); }
.phase-count { font-weight: 700; font-size: 0.9rem; font-variant-numeric: tabular-nums; color: var(--muted); }
.phase-goal { padding: 0 16px; margin: 0 0 6px; }
.chev { width: 10px; height: 10px; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: rotate(45deg); transition: transform 0.2s; margin: 0 4px; flex: none; }
details[open] > summary .chev { transform: rotate(225deg); }
.lesson-rows { list-style: none; padding: 0 0 8px; margin: 0; }
.lesson-row a { display: flex; align-items: center; gap: 12px; padding: 10px 16px; color: var(--text); text-decoration: none; min-height: 56px; }
.lesson-row a:active { background: var(--surface-2); }
.row-icon { display: grid; place-items: center; width: 30px; height: 30px; flex: none; border-radius: 50%; background: var(--surface-2); font-size: 0.8rem; font-weight: 700; color: var(--muted); }
.lesson-row.done .row-icon { background: var(--ok); color: #fff; }
.lesson-row.skipped .row-icon { background: transparent; border: 1.5px dashed var(--muted); }
.lesson-row.skipped .row-title { color: var(--muted); }
.lesson-row.next .row-icon { background: var(--accent); color: var(--on-accent); }
.row-title { flex: 1; display: flex; flex-direction: column; line-height: 1.3; font-weight: 600; }
.row-title small { color: var(--muted); font-weight: 400; font-size: 0.78rem; }
.badge { font-size: 0.7rem; font-weight: 700; padding: 3px 8px; border-radius: 99px; background: var(--surface-2); color: var(--muted); white-space: nowrap; }
.badge.m2 { background: var(--accent-soft); color: var(--accent); }
.badge.m3 { background: var(--ok-soft); color: var(--ok); }

/* ---------- Lesson ---------- */
.lesson .goal { font-size: 1.05rem; font-weight: 600; }
.steps, .tips { padding-left: 1.3em; }
.steps li, .tips li { margin: 6px 0; }
.exercise { background: var(--accent-soft); border-radius: 12px; padding: 12px 14px; }
.practice { margin: 16px 0; }
.finish { margin: 16px 0 8px; }
.rating { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.rating-q { font-weight: 700; }
.rating-btns { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 8px; }
.rating-btns .btn { padding: 8px 6px; }
.after { margin-top: 14px; }
.checklist { list-style: none; display: grid; gap: 4px; }
.checklist li { display: flex; align-items: center; justify-content: space-between; gap: 10px; min-height: 48px; }
.checklist label { display: flex; align-items: center; gap: 10px; }
.string-row { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; margin: 12px 0; }
.targets { grid-template-columns: repeat(7, 1fr); }
.note-btn {
  display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 60px;
  border: 1px solid var(--line); border-radius: 12px; background: var(--surface-2); font-weight: 800; font-size: 1.2rem; line-height: 1.1;
}
.note-btn small { font-weight: 500; font-size: 0.66rem; color: var(--muted); }
.note-btn:active, .note-btn[aria-checked="true"] { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.note-btn[aria-checked="true"] small { color: inherit; }
.note-btn.right { background: var(--ok); color: #fff; }
.note-btn.wrong { background: var(--surface); border-color: var(--muted); }

/* ---------- Chord viewer ---------- */
.viewer { display: flex; flex-direction: column; align-items: center; }
.board-btn { border: 0; background: none; padding: 0; border-radius: 12px; width: min(100%, 250px); }
.viewer.compact .board-btn { width: min(100%, 190px); }
.viewer-row { display: flex; align-items: center; gap: 10px; min-height: 36px; }
.board-caption { margin: 0; color: var(--muted); font-size: 0.9rem; }
.board-caption strong { color: var(--text); }
.viewer-controls { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
.transition-note { font-size: 0.88rem; color: var(--muted); text-align: center; min-height: 1.4em; margin: 8px 0 0; max-width: 34em; }

.fretboard { display: block; width: 100%; height: auto; }
.fretboard .fret { stroke: var(--board-line); stroke-width: 1.5; }
.fretboard .nut { stroke: var(--text); stroke-width: 6; stroke-linecap: round; }
.fretboard .string { stroke: var(--board-line); }
.fretboard.up-neck .nut { stroke: var(--board-line); stroke-width: 1.5; }
.fretboard .string.hl { stroke: var(--accent); }
.fretboard .string-label, .fretboard .base-label { fill: var(--muted); font: 600 11px var(--font); text-anchor: middle; }
.fretboard .base-label { font-size: 12px; fill: var(--text); }
.fretboard .marker > * { opacity: 0; transition: opacity 0.3s; fill: none; stroke: var(--text); stroke-width: 2; stroke-linecap: round; }
.fretboard .marker.is-open .open, .fretboard .marker.is-muted .muted { opacity: 1; }
.fretboard .marker .muted { stroke: var(--muted); }
.fretboard .finger rect, .fretboard .finger circle { fill: var(--accent); }
.fretboard .finger text { fill: var(--on-accent); font: 700 13px var(--font); text-anchor: middle; }
.fretboard .finger.anchor rect { stroke: var(--anchor); stroke-width: 3.5; }
.fretboard .finger.guide rect { stroke: var(--anchor); stroke-width: 2.5; stroke-dasharray: 4 3; }
.fretboard .finger.root circle { fill: var(--text); }
.fretboard .finger.root text { fill: var(--bg); }
.fretboard .trail { stroke: var(--accent); stroke-width: 2; stroke-dasharray: 3 4; stroke-linecap: round; opacity: 0.7; transition: opacity 0.8s 0.4s; }
.fretboard .trails.fade .trail { opacity: 0; }
.fretboard .hidden-name { opacity: 0; fill: var(--text); font: 800 44px var(--font); text-anchor: middle; }
.chord-diagram.help-1 .finger text { opacity: 0; }
.chord-diagram.help-2 .finger, .chord-diagram.help-2 .marker, .chord-diagram.help-2 .trails, .chord-diagram.help-2 .base-label { visibility: hidden; }
.chord-diagram.help-2 .hidden-name { opacity: 1; }
.legend { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 6px; font-size: 0.84rem; color: var(--muted); }
.legend li { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.legend-dot, .legend-open, .legend-muted, .legend-anchor { display: inline-grid; place-items: center; width: 22px; height: 22px; flex: none; }
.legend-dot { border-radius: 50%; background: var(--accent); color: var(--on-accent); font-weight: 700; font-size: 0.75rem; }
.legend-anchor { border-radius: 50%; background: var(--accent); box-shadow: inset 0 0 0 3px var(--anchor); }
.legend-open::before { content: ""; width: 12px; height: 12px; border: 2px solid var(--text); border-radius: 50%; }
.legend-muted { font-size: 1.2rem; font-weight: 700; }
.scale-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.scale-card { display: flex; flex-direction: column; align-items: center; margin: 0; }
.scale-card svg { max-width: 230px; }
.scale-card figcaption { font-weight: 650; font-size: 0.92rem; }
.ex-visual .scale-diagram { max-width: 230px; margin: 0 auto; }

/* ---------- Exercise, lane, tab ---------- */
.prog-strip { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin-bottom: 8px; }
.prog-chip { min-width: 46px; padding: 6px 10px; border-radius: 10px; background: var(--surface-2); text-align: center; font-weight: 750; transition: background 0.1s; }
.prog-chip.next { box-shadow: inset 0 0 0 2px var(--accent); }
.prog-chip.now { background: var(--accent); color: var(--on-accent); }
.open-note { text-align: center; color: var(--muted); }
.lane { display: block; width: 100%; max-width: 420px; margin: 10px auto 4px; height: auto; }
.lane-strings line { stroke: var(--board-line); stroke-width: 1; opacity: 0.5; }
.lane-cell rect { fill: var(--surface-2); transition: fill 0.06s; }
.lane-cell.now rect { fill: var(--accent-soft); }
.lane-mark path { fill: none; stroke: var(--text); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.lane-cell.ghost .lane-mark path { stroke: var(--muted); stroke-width: 1.5; stroke-dasharray: 3 3; opacity: 0.7; }
.lane-cell.muted .lane-mark path { stroke: var(--muted); }
.lane-count { fill: var(--muted); font: 600 12px var(--font); text-anchor: middle; }
.lane-pick { fill: var(--accent); stroke: var(--surface); stroke-width: 2; }
.lane-pick.is-ghost { opacity: 0.45; }
.tab { display: grid; gap: 8px; margin: 10px 0; overflow-x: auto; }
.tab-bar { background: var(--surface-2); border-radius: 10px; padding: 6px 8px; }
.tab-chord { font-weight: 750; font-size: 0.85rem; margin-bottom: 2px; }
.tab-row { display: grid; grid-template-columns: 16px repeat(8, 1fr); align-items: center; height: 20px; background: linear-gradient(var(--board-line), var(--board-line)) center / 100% 1px no-repeat; }
.tab-label { font-size: 0.7rem; font-weight: 700; color: var(--muted); background: var(--surface-2); }
.tab-cell { text-align: center; font: 700 0.82rem/1 ui-monospace, Menlo, monospace; }
.tab-cell:not(:empty) { background: var(--surface-2); justify-self: center; padding: 1px 3px; border-radius: 4px; }
.tab-cell.now:not(:empty) { background: var(--accent); color: var(--on-accent); }
.tempo-row { display: flex; align-items: center; justify-content: center; gap: 14px; margin: 10px 0; }
.tempo-readout { text-align: center; font-weight: 600; color: var(--muted); }
.tempo-readout strong { font-size: 1.9rem; color: var(--text); font-variant-numeric: tabular-nums; }
.tempo-readout small { display: block; font-weight: 500; }
.rep-prompt, .offer { background: var(--accent-soft); border-radius: 12px; padding: 12px 14px; margin: 10px 0; }
.rep-prompt p, .offer p { margin: 0 0 6px; font-weight: 600; }
.honesty { margin: 6px 0 0; }

/* ---------- Drill & tap pad ---------- */
.drill-stats { display: grid; grid-template-columns: 1fr 1fr; text-align: center; margin: 6px 0; }
.drill-stats span { display: block; font-size: 2.4rem; font-weight: 800; line-height: 1.1; font-variant-numeric: tabular-nums; }
.drill-stats small { color: var(--muted); font-size: 0.8rem; }
.drill-compare { text-align: center; color: var(--muted); min-height: 1.4em; margin: 8px 0 4px; }
.tap-pad {
  display: flex; flex-direction: column; align-items: center; justify-content: center; width: 100%; min-height: 120px; margin: 8px 0;
  border: 0; border-radius: 20px; background: var(--accent); color: var(--on-accent); font-size: 1.4rem; font-weight: 800;
  touch-action: manipulation; user-select: none; -webkit-user-select: none;
}
.tap-pad small { font-size: 0.8rem; font-weight: 600; opacity: 0.85; }
.tap-pad.pulse { animation: pad 0.18s ease-out; }
@keyframes pad { from { transform: scale(0.96); } to { transform: scale(1); } }
.drill-cancel { display: block; margin: 4px auto; }
.pair-pick { display: flex; align-items: flex-end; gap: 8px; }
.pair-pick > span { padding-bottom: 18px; color: var(--muted); }
.meter { position: relative; height: 34px; border-radius: 10px; background: var(--surface-2); margin: 8px 0; overflow: hidden; }
.meter-mid { position: absolute; left: 50%; top: 4px; bottom: 4px; width: 2px; background: var(--text); }
.meter-l, .meter-r { position: absolute; top: 8px; font-size: 0.7rem; color: var(--muted); font-weight: 600; }
.meter-l { left: 8px; } .meter-r { right: 8px; }
.meter-dot { position: absolute; top: 9px; width: 16px; height: 16px; margin-left: -8px; border-radius: 50%; background: var(--accent); border: 2px solid var(--surface); transition: opacity 1s; }
.meter-dot.old { opacity: 0.35; }

/* ---------- Quiz ---------- */
.quiz-board { max-width: 210px; margin: 0 auto; }
.quiz-q { text-align: center; font-weight: 700; margin: 6px 0; }
.quiz-answers { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; }
.quiz-answers.five { grid-template-columns: repeat(5, 1fr); }
.quiz-feedback { text-align: center; min-height: 1.5em; margin: 8px 0 0; font-weight: 600; }

/* ---------- Mix ---------- */
.mix-step { margin: 0 0 6px; }

/* ---------- Metronome ---------- */
.metro { display: flex; flex-direction: column; align-items: center; gap: 14px; text-align: center; }
.beats { display: flex; gap: 14px; min-height: 24px; align-items: center; }
.beats span { width: 16px; height: 16px; border-radius: 50%; background: var(--surface-2); border: 1px solid var(--line); transition: background 0.05s, transform 0.05s; }
.beats span:first-child { width: 20px; height: 20px; }
.beats span.on { background: var(--accent); border-color: var(--accent); transform: scale(1.25); }
.bpm-readout output { font-size: 3.4rem; font-weight: 800; line-height: 1; font-variant-numeric: tabular-nums; }
.bpm-readout span { color: var(--muted); font-weight: 600; }
.bpm-controls { display: flex; align-items: center; gap: 12px; width: 100%; max-width: 420px; }
input[type="range"] { flex: 1; accent-color: var(--accent); height: 44px; }
.metro-options { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }

/* ---------- Tuner ---------- */
.tuner { text-align: center; }
.tuner-note { font-size: 4.5rem; font-weight: 800; line-height: 1; margin: 8px 0; font-variant-numeric: tabular-nums; transition: color 0.2s; }
.tuner-note small { font-size: 1.4rem; color: var(--muted); }
.tuner-live.in-tune .tuner-note { color: var(--ok); }
.tuner-live.stale .tuner-note, .tuner-live.stale .gauge-needle { opacity: 0.35; }
.gauge { max-width: 360px; margin: 0 auto; }
.gauge-scale { display: flex; justify-content: space-between; font-size: 0.7rem; color: var(--muted); font-weight: 600; }
.gauge-track { position: relative; height: 40px; border-radius: 12px; background: var(--surface-2); margin-top: 4px; }
.gauge-zone { position: absolute; left: 45%; width: 10%; top: 0; bottom: 0; background: var(--ok-soft); }
.gauge-needle { position: absolute; top: 4px; bottom: 4px; left: 50%; width: 4px; margin-left: -2px; border-radius: 2px; background: var(--accent); transition: left 0.12s linear; }
.tuner-live.in-tune .gauge-needle { background: var(--ok); }
.tuner-advice { font-weight: 700; font-size: 1.05rem; min-height: 1.5em; margin: 12px 0; }

/* ---------- Levels, settings ---------- */
.levels { display: grid; gap: 10px; margin-bottom: 12px; }
.level-card { display: grid; grid-template-columns: auto 1fr; gap: 2px 12px; align-items: center; padding: 14px 16px; border: 1.5px solid var(--line); border-radius: var(--radius); background: var(--surface); cursor: pointer; }
.level-card input { grid-row: span 2; width: 22px; height: 22px; accent-color: var(--accent); }
.level-name { font-weight: 750; }
.level-card.selected, .level-card:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.welcome .lead { max-width: 34em; }
.code-box { margin: 8px 0; }

/* ---------- Progress ---------- */
.tempo-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.tempo-list li { display: grid; grid-template-columns: 1fr 90px auto; gap: 10px; align-items: center; font-size: 0.9rem; }
.tempo-list a { color: var(--text); }
.tempo-bar { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.tempo-bar span { display: block; height: 100%; background: var(--accent); }

/* ---------- Chart ---------- */
.chart { position: relative; margin: 8px 0 0; }
.chart-title { font-weight: 650; font-size: 0.9rem; margin-bottom: 4px; }
.chart-svg { display: block; width: 100%; height: auto; touch-action: pan-y; }
.chart-grid { stroke: var(--line); stroke-width: 1; }
.chart-axis { fill: var(--muted); font: 500 10px var(--font); }
.chart-line { fill: none; stroke: var(--chart-line); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart-area { fill: var(--chart-line); opacity: 0.1; }
.chart-dot { fill: var(--chart-line); stroke: var(--surface); stroke-width: 2; }
.chart-dot.on { r: 6; }
.chart-label { fill: var(--text); font: 700 11px var(--font); }
.chart-cross { stroke: var(--muted); stroke-width: 1; }
.chart-tip { position: absolute; top: 22px; transform: translateX(-50%); background: var(--text); color: var(--bg); font-size: 0.78rem; font-weight: 600; padding: 4px 8px; border-radius: 8px; white-space: nowrap; pointer-events: none; }
.chart-empty { margin: 8px 0; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}