/* ==========================================================================
   Compás — variable meter metronome
   Themes: four soothing palettes × light/dark, via CSS custom properties.
   ========================================================================== */

:root {
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(0,0,0,.06), 0 8px 24px -12px rgba(0,0,0,.18);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --ease: cubic-bezier(.2,.7,.2,1);
}

/* ---- Palettes (light) ---- */
:root[data-theme="teal"] {
  --accent: #3d8a8a; --accent-2: #2f6d6d; --accent-soft: #d8ebea; --accent-text: #ffffff;
  --bg: #eef3f3; --surface: #ffffff; --surface-2: #f3f7f7; --border: #d7e1e1;
  --text: #1c2a2b; --muted: #61797a; --danger: #b3554d;
  --beat-idle: #cfdede; --beat-on: #3d8a8a; --beat-accent: #1f5c5c; --beat-flash: #7fd0c9;
}
:root[data-theme="sand"] {
  --accent: #b8744b; --accent-2: #9a5c38; --accent-soft: #f2e3d7; --accent-text: #ffffff;
  --bg: #f6f0e8; --surface: #fffdf9; --surface-2: #f7efe5; --border: #e6d8c8;
  --text: #2f2721; --muted: #857160; --danger: #b3554d;
  --beat-idle: #e6d7c6; --beat-on: #b8744b; --beat-accent: #7d4526; --beat-flash: #f0b48c;
}
:root[data-theme="forest"] {
  --accent: #5b8a5f; --accent-2: #45704a; --accent-soft: #dfeadf; --accent-text: #ffffff;
  --bg: #eef2ec; --surface: #ffffff; --surface-2: #f2f6f1; --border: #d5dfd3;
  --text: #1f2a20; --muted: #667a68; --danger: #b3554d;
  --beat-idle: #d2dfd1; --beat-on: #5b8a5f; --beat-accent: #2f5a35; --beat-flash: #9ed3a2;
}
:root[data-theme="violet"] {
  --accent: #7d6ea6; --accent-2: #635488; --accent-soft: #e6e1f1; --accent-text: #ffffff;
  --bg: #f0eef5; --surface: #ffffff; --surface-2: #f5f3f9; --border: #dcd7e7;
  --text: #24202e; --muted: #736c86; --danger: #b3554d;
  --beat-idle: #dad4e8; --beat-on: #7d6ea6; --beat-accent: #4b3f70; --beat-flash: #bfb0e6;
}

/* ---- Palettes (dark) ---- */
:root[data-mode="dark"][data-theme="teal"] {
  --accent: #6fbdb8; --accent-2: #8fd1cc; --accent-soft: #23403f; --accent-text: #0f1c1c;
  --bg: #121a1b; --surface: #1b2527; --surface-2: #213033; --border: #2d3d40;
  --text: #e4eeee; --muted: #8fa5a6; --danger: #e08078;
  --beat-idle: #2c3c3e; --beat-on: #6fbdb8; --beat-accent: #b6ecea; --beat-flash: #d6fff9;
}
:root[data-mode="dark"][data-theme="sand"] {
  --accent: #d9a077; --accent-2: #e8b48f; --accent-soft: #46332a; --accent-text: #1e1611;
  --bg: #1a1512; --surface: #251e1a; --surface-2: #2e2521; --border: #3f342e;
  --text: #f0e8e0; --muted: #ad9c8d; --danger: #e08078;
  --beat-idle: #3e322c; --beat-on: #d9a077; --beat-accent: #f7d3b7; --beat-flash: #ffe9d6;
}
:root[data-mode="dark"][data-theme="forest"] {
  --accent: #8dbf8f; --accent-2: #a7d4a9; --accent-soft: #2b3f2d; --accent-text: #101a11;
  --bg: #131a14; --surface: #1c251d; --surface-2: #233025; --border: #2f3f31;
  --text: #e6efe6; --muted: #93a894; --danger: #e08078;
  --beat-idle: #2e3d30; --beat-on: #8dbf8f; --beat-accent: #c9ebca; --beat-flash: #e3ffe4;
}
:root[data-mode="dark"][data-theme="violet"] {
  --accent: #ab9dd6; --accent-2: #c2b5e6; --accent-soft: #352d4b; --accent-text: #15111f;
  --bg: #16131d; --surface: #201c2a; --surface-2: #292434; --border: #383144;
  --text: #ebe7f3; --muted: #9f97b3; --danger: #e08078;
  --beat-idle: #35304a; --beat-on: #ab9dd6; --beat-accent: #dcd3f5; --beat-flash: #f1ecff;
}
:root[data-mode="dark"] { --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 30px -14px rgba(0,0,0,.6); }

/* ---- Base ---- */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  padding-bottom: env(safe-area-inset-bottom);
  transition: background-color .25s var(--ease), color .25s var(--ease);
}
button { font: inherit; color: inherit; cursor: pointer; }
button:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -.01em; }
h2 { font-size: .95rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 600; }
.muted { color: var(--muted); font-weight: 400; text-transform: none; letter-spacing: 0; }
code { font-family: var(--mono); font-size: .85em; background: var(--surface-2); padding: .05em .35em; border-radius: 4px; }
kbd { font-family: var(--mono); font-size: .8em; border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 5px; padding: .05em .4em; background: var(--surface-2); }

/* ---- Top bar ---- */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 16px; padding-top: calc(12px + env(safe-area-inset-top));
  max-width: 1180px; margin: 0 auto;
}
.brand { display: flex; align-items: baseline; gap: 10px; }
.brand h1 { font-size: 1.25rem; }
.brand-mark { width: 12px; height: 12px; border-radius: 50%; background: var(--accent); align-self: center; box-shadow: 0 0 0 4px var(--accent-soft); }
.brand-sub { color: var(--muted); font-size: .8rem; }
.topbar-controls { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.icon-btn { flex-shrink: 0; }
@media (max-width: 480px) {
  .brand-sub { display: none; }
  .topbar { padding-left: 12px; padding-right: 12px; }
}
.theme-swatches { display: flex; gap: 6px; padding: 4px; background: var(--surface); border: 1px solid var(--border); border-radius: 999px; }
.swatch { width: 20px; height: 20px; border-radius: 50%; border: 2px solid transparent; padding: 0; transition: transform .15s var(--ease); }
.swatch[data-theme="teal"] { background: #3d8a8a; }
.swatch[data-theme="sand"] { background: #b8744b; }
.swatch[data-theme="forest"] { background: #5b8a5f; }
.swatch[data-theme="violet"] { background: #7d6ea6; }
.swatch[aria-checked="true"] { border-color: var(--text); transform: scale(1.12); }
.icon-btn {
  display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 50%;
  background: var(--surface); border: 1px solid var(--border); font-weight: 600;
  transition: background .15s, transform .1s;
}
.icon-btn:hover { background: var(--surface-2); }
.icon-btn:active { transform: scale(.95); }
.icon-btn.big { width: 52px; height: 52px; }
.icon-btn.toggle[aria-pressed="true"] { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
:root[data-mode="dark"] .ico-sun { display: none; }
:root:not([data-mode="dark"]) .ico-moon { display: none; }

/* ---- Layout ---- */
.layout {
  display: grid; grid-template-columns: 1fr; gap: 14px;
  max-width: 1180px; margin: 0 auto; padding: 0 16px 24px;
}
@media (min-width: 900px) {
  .layout { grid-template-columns: 420px 1fr; align-items: start; }
  .col-transport { position: sticky; top: 12px; }
}
.col { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; box-shadow: var(--shadow);
  transition: background-color .25s var(--ease), border-color .25s var(--ease);
}
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.btn-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.inline-label { display: flex; align-items: center; gap: 8px; font-size: .8rem; color: var(--muted); }
.inline-label input[type="range"] { width: 90px; }

/* ---- Tempo ---- */
.bpm-display { text-align: center; padding: 4px 0 8px; }
.bpm-number {
  font-size: clamp(64px, 18vw, 96px); font-weight: 700; line-height: 1; letter-spacing: -.03em;
  font-variant-numeric: tabular-nums; cursor: ns-resize; user-select: none;
}
.bpm-label { color: var(--muted); font-size: .85rem; letter-spacing: .12em; text-transform: uppercase; margin-top: 4px; }
.bpm-unit { font-size: 1rem; letter-spacing: 0; margin-left: 4px; }
.quick-row { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; }
.qbtn, .small-btn, .tap-btn, .subdiv, .seg-btn {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 9px 6px; font-weight: 600; font-variant-numeric: tabular-nums;
  transition: background .12s, transform .08s, border-color .12s;
}
.qbtn:hover, .small-btn:hover, .tap-btn:hover, .subdiv:hover, .seg-btn:hover { background: var(--accent-soft); border-color: var(--accent); }
.qbtn:active, .small-btn:active, .tap-btn:active { transform: scale(.96); }
.tap-row { display: grid; grid-template-columns: auto 1fr; gap: 10px; align-items: center; margin-top: 10px; }
.tap-btn { padding: 10px 16px; min-width: 110px; }
.tap-btn.flash { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
input[type="range"] { accent-color: var(--accent); width: 100%; }

/* ---- Play card ---- */
.play-row { display: flex; justify-content: center; align-items: center; gap: 18px; padding: 4px 0 10px; }
.play-btn {
  width: 92px; height: 92px; border-radius: 50%; border: none;
  background: var(--accent); color: var(--accent-text);
  display: grid; place-items: center; box-shadow: 0 8px 24px -8px var(--accent);
  transition: transform .1s, background .15s;
}
.play-btn:hover { background: var(--accent-2); }
.play-btn:active { transform: scale(.95); }
.play-btn .ico-pause { display: none; }
.play-btn.playing .ico-play { display: none; }
.play-btn.playing .ico-pause { display: block; }
.countin-row { display: flex; align-items: center; justify-content: center; gap: 8px; font-size: .8rem; margin-bottom: 10px; }
.countin-row select { padding: 5px 24px 5px 9px; font-size: .8rem; }
.beat.countin { background: var(--accent-soft); color: var(--accent); box-shadow: none; }
.beat.countin.on { background: var(--accent); color: var(--accent-text); transform: scale(1.18); }
.now-sig.countin { color: var(--accent); }
.now-playing { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
.now-sig { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.now-pos { color: var(--muted); font-size: .85rem; font-variant-numeric: tabular-nums; }

/* ---- Beat indicator ---- */
.beat-strip { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; min-height: 44px; align-items: center; }
.beat {
  --size: 34px;
  width: var(--size); height: var(--size); border-radius: 50%;
  background: var(--beat-idle); color: var(--muted);
  display: grid; place-items: center; font-weight: 700; font-size: .85rem; font-variant-numeric: tabular-nums;
  transition: transform .06s var(--ease), background-color .06s, color .06s;
}
.beat-strip.dense .beat { --size: 28px; font-size: .75rem; }
.beat.accent { box-shadow: inset 0 0 0 2px var(--beat-on); }
.beat.downbeat { box-shadow: inset 0 0 0 3px var(--beat-accent); }
.beat.silent { opacity: .35; }
.beat.on { background: var(--beat-on); color: var(--accent-text); transform: scale(1.18); }
.beat.on.downbeat { background: var(--beat-accent); color: var(--surface); transform: scale(1.3); }
.beat.on.accent { background: var(--beat-accent); color: var(--surface); }
.sub-strip { display: flex; gap: 5px; justify-content: center; margin-top: 8px; min-height: 8px; }
.sub-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--beat-idle); transition: background-color .05s; }
.sub-dot.on { background: var(--beat-flash); }
.progress { height: 4px; border-radius: 2px; background: var(--beat-idle); margin-top: 12px; overflow: hidden; display: flex; gap: 2px; }
.progress .seg-bar { height: 100%; background: var(--beat-idle); transition: background-color .1s; flex: 1 1 0; }
.progress .seg-bar.done { background: var(--accent-soft); }
.progress .seg-bar.active { background: var(--accent); }

/* ---- Subdivision ---- */
.subdiv-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.subdiv { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 8px 4px; }
.subdiv .note-glyph { font-size: 1.3rem; line-height: 1; }
.subdiv .note-glyph sup { font-size: .55em; }
.subdiv span:last-child { font-size: .7rem; color: var(--muted); }
.subdiv[aria-pressed="true"], .seg-btn[aria-pressed="true"] { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.subdiv[aria-pressed="true"] span { color: inherit; }
.tempo-unit { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 12px; font-size: .8rem; flex-wrap: wrap; }
.seg { display: inline-flex; border-radius: var(--radius-sm); overflow: hidden; }
.seg-btn { border-radius: 0; padding: 7px 10px; font-size: .8rem; }
.seg-btn:first-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }
.seg-btn:last-child { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; border-left: none; }

/* ---- Session ---- */
.small-btn { padding: 7px 12px; font-size: .82rem; }
.small-btn.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.small-btn.primary:hover { background: var(--accent-2); }
.small-btn.danger:hover { background: transparent; color: var(--danger); border-color: var(--danger); }
.session-timer { font-family: var(--mono); font-size: 2.2rem; font-weight: 600; text-align: center; padding: 4px 0 12px; font-variant-numeric: tabular-nums; letter-spacing: .02em; }
.session-timer.running { color: var(--accent); }
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.stat { background: var(--surface-2); border-radius: var(--radius-sm); padding: 10px; text-align: center; }
.stat-label { font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.stat-val { font-size: 1.15rem; font-weight: 700; margin-top: 2px; font-variant-numeric: tabular-nums; }
.stat-sub { font-size: .7rem; color: var(--muted); margin-top: 2px; }

/* ---- Sequence editor ---- */
.seq-meta { font-size: .85rem; font-variant-numeric: tabular-nums; }
.seq-name-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; font-size: .85rem; }
.seq-name-row input { flex: 1; }
input[type="text"], input[type="number"], select {
  font: inherit; color: var(--text); background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 7px 9px; min-width: 0;
}
input[type="number"] { font-variant-numeric: tabular-nums; }
select { padding-right: 24px; }
.seq-header, .step {
  display: grid; align-items: center; gap: 8px;
  grid-template-columns: 30px 118px 62px 96px 70px 1fr 30px;
}
.seq-header { font-size: .7rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); padding: 0 6px 6px; }
.steps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.step {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 8px 6px;
  transition: border-color .12s, box-shadow .12s;
}
.step.active { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }
.step .idx { display: flex; flex-direction: column; align-items: center; gap: 0; color: var(--muted); font-size: .75rem; }
.step .idx .n { font-weight: 700; color: var(--text); }
.step .sig { display: flex; align-items: center; gap: 3px; }
.step .sig select { padding: 6px 4px; width: 52px; text-align: center; }
.step .sig .slash { color: var(--muted); font-weight: 700; }
.step input[type="number"] { width: 100%; padding: 6px 6px; }
.step select { width: 100%; padding: 6px 4px; }
.step .accents { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.step .accents input { width: 100%; padding: 5px 8px; font-family: var(--mono); font-size: .8rem; }
.step .accents input.invalid { border-color: var(--danger); }
.step .mini-dots { display: flex; flex-wrap: wrap; gap: 3px; }
.mini-dot {
  width: 16px; height: 16px; border-radius: 50%; border: none; padding: 0;
  background: var(--beat-idle); transition: background .1s, transform .1s;
}
.mini-dot:hover { transform: scale(1.2); }
.mini-dot.downbeat { background: var(--beat-accent); cursor: default; }
.mini-dot.accent { background: var(--beat-on); }
.mini-dot.silent { background: transparent; box-shadow: inset 0 0 0 1.5px var(--beat-idle); }
.step .tools { display: flex; flex-direction: column; gap: 2px; align-items: center; }
.step .tools button, .step .idx button {
  background: transparent; border: none; padding: 2px; border-radius: 4px; color: var(--muted); line-height: 1; font-size: .8rem;
}
.step .tools button:hover, .step .idx button:hover { color: var(--text); background: var(--surface); }
.step .tools button.del:hover { color: var(--danger); }
.step .tools button:disabled, .step .idx button:disabled { opacity: .3; cursor: default; }
.seq-actions { margin-top: 12px; }
.hint { font-size: .75rem; }

@media (max-width: 640px) {
  .seq-header { display: none; }
  .step {
    grid-template-columns: 30px 1fr 1fr 30px;
    grid-template-areas:
      "idx sig bars tools"
      "idx sub bpm tools"
      "idx acc acc tools";
    row-gap: 6px;
  }
  .step .idx { grid-area: idx; }
  .step .sig { grid-area: sig; }
  .step .bars { grid-area: bars; }
  .step .subsel { grid-area: sub; }
  .step .bpmov { grid-area: bpm; }
  .step .accents { grid-area: acc; }
  .step .tools { grid-area: tools; }
  .step .sig select { width: 100%; }
  .step .bars, .step .subsel, .step .bpmov { display: flex; align-items: center; gap: 6px; font-size: .72rem; color: var(--muted); }
  .step .bars::before { content: "bars"; }
  .step .subsel::before { content: "sub"; }
  .step .bpmov::before { content: "bpm"; }
}
@media (min-width: 641px) {
  .step .bars::before, .step .subsel::before, .step .bpmov::before { content: none; }
}

/* ---- Presets ---- */
.check-label { display: flex; align-items: center; gap: 6px; font-size: .8rem; color: var(--muted); }
.check-label input { accent-color: var(--accent); }
.preset-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.preset {
  display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 8px 10px;
}
.preset.current { border-color: var(--accent); }
.preset .p-main { min-width: 0; }
.preset .p-name { font-weight: 600; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.preset .p-name .tag { flex-shrink: 0; }
@media (max-width: 480px) {
  .preset { grid-template-columns: 1fr; }
  .preset .p-actions { justify-content: flex-end; }
}
.preset .p-name .tag { font-size: .65rem; text-transform: uppercase; letter-spacing: .06em; color: var(--accent); background: var(--accent-soft); padding: 1px 6px; border-radius: 999px; font-weight: 600; }
.preset .p-desc { font-size: .78rem; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.preset .p-actions { display: flex; gap: 4px; }
.preset .p-actions button { background: transparent; border: 1px solid transparent; border-radius: 6px; padding: 5px 8px; font-size: .78rem; color: var(--muted); }
.preset .p-actions button:hover { background: var(--surface); border-color: var(--border); color: var(--text); }
.preset .p-actions button.load { color: var(--accent); font-weight: 600; }
.preset .p-actions button.del:hover { color: var(--danger); }
.preset .p-rename { width: 100%; }
.empty { color: var(--muted); font-size: .85rem; padding: 8px; text-align: center; }

/* ---- Dialog / toast ---- */
.help { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text); padding: 20px 22px; max-width: 520px; width: calc(100% - 32px); box-shadow: var(--shadow); }
.help::backdrop { background: rgba(0,0,0,.45); }
.help h2 { font-size: 1.1rem; text-transform: none; letter-spacing: 0; color: var(--text); }
.help h3 { font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin-top: 14px; }
.help p { font-size: .9rem; }
.help table { border-collapse: collapse; font-size: .9rem; }
.help td { padding: 3px 12px 3px 0; }
.help form { margin-top: 16px; text-align: right; }
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px);
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 999px; font-size: .85rem;
  opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s var(--ease); z-index: 50;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }
.toast .small-btn { background: var(--accent); color: var(--accent-text); border-color: transparent; }

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