:root {
  --bg: #0b0d10;
  --panel: #14171b;
  --panel2: #1c2025;
  --text: #f5f7fa;
  --muted: #9ca3ad;
  --line: #2a3038;
  --accent: #f2f2f2;
  --good: #b8f5c8;
  --warn: #ffe29a;
  --danger: #ffb4b4;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
body { min-height: 100vh; }
button, input, select { font: inherit; }
button { cursor: pointer; }
.app-shell { max-width: 720px; margin: 0 auto; min-height: 100vh; padding: 20px 16px 40px; }
.brand { font-size: 12px; letter-spacing: .18em; color: var(--muted); margin-bottom: 24px; }
.hero { font-size: clamp(34px, 9vw, 56px); line-height: .98; font-weight: 800; letter-spacing: -.04em; margin: 0 0 12px; }
.sub { color: var(--muted); line-height: 1.6; margin-bottom: 28px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 20px; padding: 18px; margin-bottom: 14px; }
.label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .12em; margin-bottom: 10px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; }
.pill { flex: 1 1 auto; min-width: 74px; background: var(--panel2); border: 1px solid var(--line); color: var(--text); border-radius: 14px; padding: 13px 12px; }
.pill.active { background: var(--accent); color: #111; border-color: var(--accent); font-weight: 700; }
.primary { width: 100%; border: 0; border-radius: 16px; padding: 16px 18px; background: var(--accent); color: #111; font-weight: 800; font-size: 16px; }
.secondary { border: 1px solid var(--line); border-radius: 14px; background: var(--panel2); color: var(--text); padding: 12px 14px; }
.workout-title { display: flex; align-items: end; justify-content: space-between; gap: 12px; }
.workout-title h2 { margin: 0; font-size: 28px; }
.workout-list { display: grid; gap: 10px; margin: 18px 0; }
.exercise { background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 16px; }
.exercise.done { opacity: .55; }
.exercise.current { border-color: #fff; box-shadow: inset 0 0 0 1px #fff; }
.exercise-top { display: flex; justify-content: space-between; gap: 12px; }
.exercise-name { font-weight: 800; font-size: 18px; }
.exercise-meta { color: var(--muted); font-size: 13px; margin-top: 6px; }
.weight { font-size: 20px; font-weight: 800; white-space: nowrap; }
.mini-actions { display: flex; gap: 8px; margin-top: 12px; }
.mini-actions button { flex: 1; background: var(--panel2); color: var(--text); border: 1px solid var(--line); border-radius: 12px; padding: 10px; }
.topbar { position: sticky; top: 0; z-index: 5; margin: -20px -16px 12px; padding: 16px; background: rgba(11,13,16,.94); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.status-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.status { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 12px; }
.status strong { display:block; font-size: 18px; margin-top: 4px; }
.chat { display: grid; gap: 10px; margin-top: 16px; }
.msg { max-width: 86%; padding: 12px 14px; border-radius: 16px; line-height: 1.5; }
.msg.ai { background: var(--panel); border: 1px solid var(--line); }
.msg.user { background: #f3f4f6; color:#111; margin-left:auto; }
.chat-input { position: sticky; bottom: 0; background: linear-gradient(to top, var(--bg) 70%, transparent); padding-top: 16px; }
.chat-box { display: flex; gap: 8px; background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 8px; }
.chat-box input { flex: 1; background: transparent; border: 0; outline: 0; color: var(--text); padding: 10px; min-width: 0; }
.chat-box button { border:0; background:#fff; color:#111; border-radius: 12px; padding: 0 14px; font-weight: 800; }
.timer { font-variant-numeric: tabular-nums; }
.quick { display:flex; flex-wrap:wrap; gap:8px; margin-top:10px; }
.quick button { background:var(--panel2); color:var(--text); border:1px solid var(--line); border-radius:999px; padding:8px 11px; }
.result-big { font-size: 44px; font-weight: 900; letter-spacing: -.04em; }
.result-list { display: grid; gap: 10px; margin: 18px 0; }
.result-row { display:flex; justify-content:space-between; gap:12px; padding:14px 0; border-bottom:1px solid var(--line); }
.note { color:var(--muted); font-size:13px; line-height:1.5; }
.small { font-size:12px; color:var(--muted); }
@media (max-width: 420px) {
  .app-shell { padding-left: 12px; padding-right: 12px; }
  .hero { font-size: 42px; }
}