:root {
  --bg: #0f1720;
  --surface: #17212c;
  --surface-2: #1f2b38;
  --text: #eef3f7;
  --muted: #9fb0c0;
  --accent: #3ddc97;
  --accent-ink: #062b1b;
  --warn: #ffcc66;
  --danger: #ff6b6b;
  --focus: #8ab4ff;
  --radius: 14px;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f6f8;
    --surface: #ffffff;
    --surface-2: #eef1f4;
    --text: #0f1720;
    --muted: #4c5b69;
    --accent: #0f9d63;
    --accent-ink: #ffffff;
    --warn: #8a5a00;
    --danger: #c62828;
    --focus: #1a56db;
    color-scheme: light;
  }
}
* { box-sizing: border-box; }
html { font-size: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1rem/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
[hidden] { display: none !important; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 8px; top: 8px; background: var(--surface); padding: 8px; z-index: 10; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.top {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 16px; border-bottom: 1px solid var(--surface-2);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.125rem; }
/* Marca (raster aprovado): casal no cabeçalho é decorativo (o nome vem em texto ao lado). */
.logo { display: block; height: 32px; width: auto; border-radius: 6px; flex: none; }
.brand-hero { display: block; width: min(240px, 60vw); height: auto; margin: 0 auto 16px; border-radius: var(--radius); }
@media (min-width: 768px) { .logo { height: 40px; } }
.badge { font-size: .7rem; font-weight: 600; padding: 2px 8px; border-radius: 99px; background: var(--surface-2); color: var(--warn); }
.lang { display: flex; align-items: center; gap: 6px; font-size: .875rem; color: var(--muted); }

main { max-width: 760px; margin: 0 auto; padding: 16px; }
.stack > * + * { margin-top: 16px; }
.card { background: var(--surface); border-radius: var(--radius); padding: 16px; }
.card h1, .card h2 { margin: 0 0 8px; }
.card h2 { font-size: 1.05rem; }
.tagline { color: var(--muted); margin: 0; }
.notes { padding-left: 1.2em; }
.notes li + li { margin-top: 8px; }
.warn { color: var(--warn); }
.small { font-size: .85rem; }
.error { color: var(--danger); min-height: 1.2em; }
.hint { margin: 8px 0 0; font-size: .925rem; }
.muted { color: var(--muted); }
.row { display: flex; flex-wrap: wrap; gap: 12px; align-items: end; margin-top: 12px; }
.field { display: flex; flex-direction: column; gap: 4px; flex: 1 1 160px; font-size: .875rem; color: var(--muted); }
.check { display: flex; gap: 8px; align-items: center; margin-top: 12px; }
select, button { font: inherit; min-height: 44px; }
select { background: var(--surface-2); color: var(--text); border: 1px solid transparent; border-radius: 10px; padding: 8px 10px; }
button {
  background: var(--surface-2); color: var(--text); border: 0; border-radius: 10px; padding: 10px 16px; cursor: pointer; font-weight: 600;
}
button.primary { background: var(--accent); color: var(--accent-ink); }
button.ghost { background: transparent; border: 1px solid var(--surface-2); }
button.danger { background: var(--danger); color: #fff; }
button.big { min-height: 56px; font-size: 1.05rem; }
button:disabled { opacity: .5; cursor: not-allowed; }
#start { width: 100%; }
.history { padding-left: 1.2em; font-size: .9rem; }

/* Treino */
#train { margin: -16px; }
.stage { position: relative; background: #000; width: 100%; aspect-ratio: 3 / 4; max-height: 78vh; overflow: hidden; }
@media (orientation: landscape) { .stage { aspect-ratio: 16 / 9; } }
.stage video, .stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.stage.mirrored video, .stage.mirrored canvas { transform: scaleX(-1); }
.hud { position: absolute; top: 12px; left: 12px; right: 12px; display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; align-items: start; pointer-events: none; }
.reps { grid-row: span 2; font-size: clamp(3rem, 14vw, 5.5rem); font-weight: 800; line-height: 1; color: #fff; text-shadow: 0 2px 8px #000a; font-variant-numeric: tabular-nums; }
.sub { color: #fff; font-size: .95rem; text-shadow: 0 1px 4px #000; }
.quality { justify-self: start; padding: 4px 10px; border-radius: 99px; font-size: .9rem; font-weight: 700; background: #000b; color: #fff; }
.quality.ok::before { content: "● "; color: #3ddc97; }
.quality.bad::before { content: "⏸ "; color: #ffcc66; }
.phase { grid-column: 2; color: #dfe7ee; font-size: .85rem; text-shadow: 0 1px 4px #000; }
.cue { position: absolute; left: 12px; right: 12px; bottom: 12px; background: #000d; color: #fff; padding: 12px 14px; border-radius: 12px; font-size: 1.15rem; font-weight: 700; display: flex; justify-content: space-between; gap: 12px; align-items: center; }
.cue .tag { font-size: .7rem; font-weight: 600; color: #ffcc66; border: 1px solid #ffcc66; border-radius: 99px; padding: 1px 8px; white-space: nowrap; }
.countdown { position: absolute; inset: 0; display: grid; place-items: center; font-size: 2.2rem; font-weight: 800; color: #fff; text-shadow: 0 2px 10px #000; pointer-events: none; }
.controls { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; padding: 12px 16px; }
#train > .warn, #train > .metrics { margin: 0 16px 12px; }
.metrics dl, #summary-list { display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; font-variant-numeric: tabular-nums; }
.metrics dt, #summary-list dt { color: var(--muted); }
.metrics dd, #summary-list dd { margin: 0; text-align: right; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }
.banner { display: flex; gap: 12px; align-items: center; justify-content: space-between; padding: 10px 16px; background: var(--surface-2); }
.warn-banner { color: var(--warn); font-weight: 700; }
#summary-export { margin: 8px 8px 0 0; }