:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5c667a;
  --paper: #fffdf7;
  --card: #ffffff;
  --line: #dfe7f1;
  --gold: #f5b932;
  --green: #16a34a;
  --blue: #2563eb;
  --purple: #7c3aed;
  --red: #ef4444;
  --shadow: 0 24px 60px rgba(29, 45, 87, 0.14);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, #fff2b8 0, transparent 31rem), radial-gradient(circle at top right, #dbeafe 0, transparent 34rem), linear-gradient(135deg, #fffaf0 0%, #f4f7ff 100%);
  color: var(--ink);
}
main { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.hero { padding: 24px 0 30px; }
nav { display: flex; justify-content: space-between; gap: 16px; align-items: center; color: var(--muted); font-size: 0.95rem; margin-bottom: 28px; }
nav a { color: var(--ink); text-decoration: none; font-weight: 800; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, 450px); gap: 28px; align-items: center; }
.eyebrow { color: #7c3aed; font-weight: 950; text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.82rem; }
h1 { font-size: clamp(2.35rem, 7vw, 5.15rem); line-height: 0.94; margin: 0 0 18px; letter-spacing: -0.07em; }
.lede { font-size: clamp(1.05rem, 2vw, 1.35rem); color: var(--muted); max-width: 58ch; line-height: 1.55; }
.preset-row, .custom-row, .actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.preset-row { margin: 26px 0 18px; }
.pill, button { border: 0; font: inherit; cursor: pointer; }
.pill { border: 2px solid var(--line); background: rgba(255,255,255,0.86); color: var(--ink); padding: 11px 14px; border-radius: 999px; font-weight: 850; box-shadow: 0 8px 18px rgba(31, 41, 55, 0.06); }
.pill.active { background: var(--ink); border-color: var(--ink); color: #fff; }
.custom-label { display: block; margin-bottom: 8px; font-weight: 900; }
input, select { width: 100%; border: 2px solid var(--line); border-radius: 14px; padding: 12px 12px; font: inherit; font-weight: 800; color: var(--ink); background: #fff; }
.custom-row input { width: 128px; }
.timer-card, .info-card, .tips, .faq, .score-card { background: rgba(255,255,255,0.93); border: 1px solid rgba(223, 231, 241, 0.95); border-radius: 30px; box-shadow: var(--shadow); }
.timer-card { padding: clamp(20px, 4vw, 34px); text-align: center; }
.progress-wrap { position: relative; width: min(78vw, 300px); margin: 0 auto 18px; }
.ring { width: 100%; display: block; transform: rotate(-90deg); }
.ring-bg, .ring-fill { fill: none; stroke-width: 18; }
.ring-bg { stroke: #edf2fb; }
.ring-fill { stroke: var(--purple); stroke-linecap: round; stroke-dasharray: 640.88; stroke-dashoffset: 0; transition: stroke-dashoffset 0.35s ease, stroke 0.35s ease; }
.time { position: absolute; inset: 0; display: grid; place-items: center; font-size: clamp(3rem, 11vw, 5.4rem); font-weight: 950; letter-spacing: -0.08em; }
.timer-card h2 { font-size: clamp(1.45rem, 3vw, 2rem); margin: 8px 0; }
.timer-card p { color: var(--muted); line-height: 1.5; margin: 0 auto 16px; max-width: 34ch; }
.prompt-box { background: #f5f3ff; border: 2px dashed #8b5cf6; border-radius: 18px; padding: 14px; margin: 16px 0 20px; font-size: 1.05rem; font-weight: 900; }
.primary, .secondary { border-radius: 16px; padding: 13px 18px; font-weight: 950; }
.primary { background: var(--green); color: white; min-width: 190px; box-shadow: 0 12px 24px rgba(22, 163, 74, 0.24); }
.secondary { background: #edf4ff; color: #17427b; }
.small { padding: 11px 13px; }
.score-card { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 18px; align-items: start; padding: clamp(20px, 3vw, 28px); margin: 4px 0 18px; }
.score-card h2 { margin-top: 0; }
.score-card p { color: var(--muted); line-height: 1.55; }
.score-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.score-grid label { font-weight: 900; color: var(--ink); }
.score-grid input, .score-grid select { margin-top: 7px; }
.score-summary { grid-column: 1 / -1; background: #f8fafc; border: 1px solid var(--line); border-radius: 16px; padding: 14px; margin: 12px 0 0; font-weight: 850; }
.content-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin: 18px 0; }
.info-card, .tips, .faq { padding: clamp(20px, 3vw, 28px); }
h2 { letter-spacing: -0.03em; }
li { margin: 9px 0; color: var(--muted); line-height: 1.55; }
.tips { margin-bottom: 18px; }
.tip-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.tip-grid div { background: #f5fbff; border: 1px solid #dceeff; border-radius: 18px; padding: 16px; font-weight: 900; text-align: center; }
.tip-grid span { display: block; color: var(--muted); font-weight: 750; margin-top: 4px; }
.faq { margin-bottom: 38px; }
details { border-top: 1px solid var(--line); padding: 15px 0; }
details:first-of-type { border-top: 0; }
summary { cursor: pointer; font-weight: 950; }
details p { color: var(--muted); line-height: 1.6; }

body.running .ring-fill { stroke: var(--blue); }
body.final-seconds .ring-fill { stroke: var(--red); }
body.done .ring-fill { stroke: var(--green); }

/* Shared brand polish */
.site-nav{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:16px;margin:-16px 0 24px;padding:12px 16px;background:rgba(255,255,255,.86);border:1px solid #e1e5ee;border-radius:24px;box-shadow:0 10px 24px rgba(22,31,54,.06);backdrop-filter:blur(12px)}
.site-brand{display:inline-flex;align-items:center;gap:10px;color:#172033;text-decoration:none;font-weight:800}.brand-mark{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:12px;background:#172033;color:#fff;font-weight:900}.site-nav a:not(.site-brand){color:#4b5565;text-decoration:none;font-weight:700;font-size:.95rem}.site-nav a:hover{text-decoration:underline}.category-section{margin-top:34px}.category-section h2{font-size:1.35rem;margin-bottom:4px}.category-kicker{margin:0;color:#657083}.grid.compact{margin-top:16px}.card:hover{transform:translateY(-2px);box-shadow:0 16px 36px rgba(22,31,54,.1)}.card{transition:transform .16s ease,box-shadow .16s ease}.site-note{margin-top:36px;padding:18px 20px;background:#fff;border:1px solid #e1e5ee;border-radius:18px;color:#4b5565}.site-note strong{color:#172033}

@media (max-width: 880px) {
  .hero-grid, .content-grid, .score-card { grid-template-columns: 1fr; }
  .score-grid { grid-template-columns: 1fr; }
  nav { align-items: flex-start; flex-direction: column; }
  .tip-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px){.site-nav{margin-top:-8px;padding:10px 12px;border-radius:20px}.site-nav a:not(.site-brand){font-size:.9rem}.brand-mark{width:30px;height:30px}.site-brand span:last-child{max-width:180px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}}
@media (max-width: 520px) {
  main { width: min(100% - 20px, 1120px); }
  .preset-row .pill { width: 100%; }
  .primary, .secondary.small { flex: 1; }
  .actions .primary, .actions .secondary { width: 100%; }
  .tip-grid { grid-template-columns: 1fr; }
}