:root {
  --bg: #111418;
  --fg: #f2f4f7;
  --muted: #8a93a0;
  --ok: #2ecc71;
  --warn: #ff9f1a;
  --info: #5dade2;
  --danger: #e74c3c;
  --panel: rgba(17, 20, 24, 0.72);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--fg); font-family: system-ui, sans-serif; }
[hidden] { display: none !important; }

.page { max-width: 560px; margin: 0 auto; padding: 24px 16px 48px; display: flex; flex-direction: column; gap: 14px; }
h1 { margin: 0 0 8px; }
h2 { margin: 24px 0 0; font-size: 1.1rem; }
.field { display: flex; flex-direction: column; gap: 6px; font-weight: 600; }
select, input[type="number"] { font-size: 1.1rem; padding: 10px; border-radius: 8px; border: 1px solid #333a44; background: #1b2027; color: var(--fg); }
.check { display: flex; gap: 8px; align-items: center; }
.hint { color: var(--muted); margin: 0; }
.error { color: var(--danger); min-height: 1.2em; margin: 0; }
button, .button-like {
  font-size: 1.1rem; padding: 14px; border-radius: 10px; border: 1px solid #333a44;
  background: #232a33; color: var(--fg); text-align: center; cursor: pointer;
}
button.primary { background: #1f6feb; border-color: #1f6feb; font-weight: 700; }
button.danger { background: var(--danger); border-color: var(--danger); }
button.small { font-size: 0.9rem; padding: 6px 10px; }
.session-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.session-list li { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.muted { color: var(--muted); }
.lead { font-size: 1.2rem; font-weight: 600; }
.set-card { background: #1b2027; border-radius: 10px; padding: 10px 14px; margin-bottom: 8px; }
.set-card h3, .set-card p { margin: 4px 0; }
.error-line { color: var(--warn); }
footer { margin-top: 24px; font-size: 0.9rem; }
footer a { color: var(--muted); }

.workout { position: fixed; inset: 0; overflow: hidden; background: #000; }
.workout video, .workout canvas { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.workout.mirrored video, .workout.mirrored canvas { transform: scaleX(-1); }

.hud { position: absolute; top: 0; left: 0; right: 0; padding: 12px 16px; display: flex; flex-direction: column; gap: 6px; pointer-events: none; }
.counters { display: flex; align-items: baseline; gap: 18px; flex-wrap: wrap; }
.reps { background: var(--panel); border-radius: 12px; padding: 4px 14px; }
#reps { font-size: clamp(3.5rem, 14vw, 7rem); font-weight: 800; line-height: 1; }
.unit { font-size: 1.2rem; margin-left: 6px; color: var(--muted); }
.set, .rest, .phase { background: var(--panel); border-radius: 10px; padding: 6px 12px; font-size: clamp(1.2rem, 4.5vw, 2rem); font-weight: 700; }
.rest { color: var(--info); }
.phase { align-self: flex-start; }

.messages { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 4px; }
.msg { align-self: flex-start; background: var(--panel); border-radius: 8px; padding: 4px 10px; }
.msg.current { font-size: clamp(1.4rem, 5.5vw, 2.4rem); font-weight: 800; }
.msg.current.ok { color: var(--ok); }
.msg.current.warn { color: var(--warn); }
.msg.current.info { color: var(--info); }
.msg.old { font-size: clamp(0.95rem, 3.5vw, 1.3rem); color: var(--muted); }

.warning {
  position: absolute; left: 16px; right: 16px; bottom: 96px; text-align: center;
  background: var(--warn); color: #111; font-weight: 800; border-radius: 12px; padding: 12px;
  font-size: clamp(1.1rem, 4.5vw, 1.8rem);
}
.countdown {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-size: 30vmin; font-weight: 900; background: rgba(0, 0, 0, 0.45);
}
.loading { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; background: var(--bg); }
.controls {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
}
.controls button { font-size: 1.15rem; font-weight: 700; min-height: 56px; }