public/style.css

:root {
  --bg: #0f1115;
  --card: #181b22;
  --text: #e8eef8;
  --muted: #a9b4c2;
  --accent: #46c2ff;
  --accent-2: #8efbbf;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: radial-gradient(80% 80% at 50% 30%, #12151c 0%, var(--bg) 70%);
  color: var(--text);
  display: grid;
  place-items: center;
}
.container {
  width: min(720px, 92vw);
  background: var(--card);
  border: 1px solid #242a35;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.45);
}
.time {
  font-size: clamp(40px, 10vw, 84px);
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.controls { display: flex; gap: 10px; justify-content: center; margin-top: 10px; }
button {
  background: #232a36;
  color: var(--text);
  border: 1px solid #2f3746;
  padding: 10px 16px;
  font-size: 1rem;
  border-radius: 10px;
  cursor: pointer;
}
button.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #111; border: none; }
button.danger { background: #3a2020; border-color: #5a2a2a; }