:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #14141f;
  --bg-tertiary: #1e1e2e;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #606070;
  --accent: #00d4ff;
  --accent-secondary: #00ff88;
  --danger: #ff4466;
  --prepare: #ffb020;
  --setrest: #b388ff;
  --focus-ring: #00d4ff;
  --focus-glow: rgba(0, 212, 255, 0.4);
  --radius-md: 12px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  width: 600px; height: 600px; overflow: hidden;
  background: #000;
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  -webkit-font-smoothing: antialiased;
}
#app { width: 100%; height: 100%; position: relative; }
.screen { width: 100%; height: 100%; position: absolute; top: 0; left: 0; display: flex; flex-direction: column; }
.screen.hidden { display: none; }
.focusable { transition: all 0.15s ease; border: 2px solid transparent; cursor: pointer; outline: none; }
.focusable:focus { border-color: var(--focus-ring); box-shadow: 0 0 20px var(--focus-glow); }
.hidden { display: none !important; }

/* Buttons */
.btn {
  display: flex; align-items: center; justify-content: center;
  width: 100%; min-height: 88px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 26px; font-weight: 700; letter-spacing: 2px;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
}
.btn-primary { background: linear-gradient(135deg, #0e3a44, #103a2c); border-color: #1f5560; }
.btn-primary:focus { border-color: var(--accent); }
.btn-danger { background: #2a0f16; color: var(--danger); }
.btn-danger:focus { border-color: var(--danger); box-shadow: 0 0 20px rgba(255,68,102,0.4); }

/* HOME */
.home-wrap { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 36px; padding: 40px; }
.brand { text-align: center; }
.brand-mark {
  width: 96px; height: 96px; margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 40px; color: var(--bg-primary);
  background: linear-gradient(135deg, var(--accent-secondary), var(--accent));
  border-radius: 28px;
}
.brand-title { font-size: 52px; font-weight: 800; letter-spacing: 4px; }
.brand-sub { font-size: 22px; color: var(--text-secondary); margin-top: 6px; letter-spacing: 1px; }
.summary-card {
  background: var(--bg-secondary); border: 1px solid var(--bg-tertiary);
  border-radius: var(--radius-md); padding: 20px 28px; text-align: center; width: 100%;
}
.summary-line { font-size: 26px; font-weight: 600; }
.summary-total { font-size: 20px; color: var(--accent); margin-top: 6px; }
.home-actions { display: flex; flex-direction: column; gap: 18px; width: 100%; }

/* Top bar (settings) */
.bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 28px; background: var(--bg-secondary);
  border-bottom: 1px solid var(--bg-tertiary);
}
.bar-title { font-size: 28px; font-weight: 800; letter-spacing: 3px; }
.bar-hint { font-size: 18px; color: var(--text-muted); }

/* SETTINGS list */
.settings-list { flex: 1; overflow: hidden; padding: 16px 24px; display: flex; flex-direction: column; gap: 12px; }
.setting-row {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 56px; padding: 0 20px;
  background: var(--bg-secondary); border-radius: var(--radius-md);
  border: 2px solid transparent;
}
.setting-row:focus { border-color: var(--focus-ring); box-shadow: 0 0 20px var(--focus-glow); }
.setting-label { font-size: 24px; font-weight: 600; }
.setting-ctrl { display: flex; align-items: center; gap: 16px; }
.setting-arrow { font-size: 24px; color: var(--accent); width: 22px; text-align: center; }
.setting-value { font-size: 26px; font-weight: 700; min-width: 92px; text-align: center; font-variant-numeric: tabular-nums; }
.setting-value.on { color: var(--accent-secondary); }
.setting-value.off { color: var(--text-muted); }
.settings-foot { padding: 16px 24px 24px; }

/* WORKOUT */
#workout { padding: 24px 28px; justify-content: space-between; }
.wk-top { text-align: center; }
.phase-label { font-size: 40px; font-weight: 800; letter-spacing: 5px; color: var(--phase, var(--accent)); }
.phase-meta { font-size: 22px; color: var(--text-secondary); margin-top: 4px; }
.ring-zone { flex: 1; display: flex; align-items: center; justify-content: center; }
.ring {
  width: 280px; height: 280px; border-radius: 50%;
  background: conic-gradient(var(--phase, var(--accent)) calc(var(--p, 1) * 360deg), var(--bg-tertiary) 0deg);
  display: flex; align-items: center; justify-content: center;
}
.ring-hole {
  width: 220px; height: 220px; border-radius: 50%;
  background: var(--bg-primary);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.big-time { font-size: 110px; font-weight: 800; line-height: 1; font-variant-numeric: tabular-nums; transition: color 0.15s, transform 0.15s; }
.big-time.urgent { color: var(--danger); transform: scale(1.08); }
.next-hint { font-size: 18px; color: var(--text-muted); margin-top: 10px; letter-spacing: 1px; }
.wk-bottom { display: flex; flex-direction: column; gap: 12px; }
.total-line { text-align: center; font-size: 20px; color: var(--text-secondary); font-variant-numeric: tabular-nums; }
.total-bar { width: 100%; height: 6px; background: var(--bg-tertiary); border-radius: 3px; overflow: hidden; }
.total-bar-fill { height: 100%; width: 0%; background: var(--accent); border-radius: 3px; transition: width 0.2s linear; }
.wk-controls { display: flex; gap: 16px; }
.wk-controls .btn { font-size: 22px; }
#workout.paused .phase-label::after { content: ' ⏸'; }

/* COMPLETE */
.done-wrap { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 30px; padding: 40px; }
.done-mark {
  width: 110px; height: 110px; display: flex; align-items: center; justify-content: center;
  font-size: 56px; color: var(--bg-primary);
  background: linear-gradient(135deg, var(--accent-secondary), var(--accent));
  border-radius: 50%;
}
.done-title { font-size: 44px; font-weight: 800; letter-spacing: 4px; }
.done-stats { display: flex; gap: 16px; width: 100%; }
.stat {
  flex: 1; background: var(--bg-secondary); border-radius: var(--radius-md);
  padding: 18px 8px; text-align: center; border: 1px solid var(--bg-tertiary);
}
.stat-val { display: block; font-size: 34px; font-weight: 800; color: var(--accent); font-variant-numeric: tabular-nums; }
.stat-key { font-size: 16px; color: var(--text-secondary); }