:root {
  color-scheme: dark;
  font-family:
    Inter, "Hiragino Sans", "Yu Gothic", system-ui, -apple-system, sans-serif;
  background: #080c14;
  color: #f8fafc;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at top left, rgba(59, 130, 246, 0.2), transparent 32%),
    radial-gradient(circle at bottom right, rgba(139, 92, 246, 0.18), transparent 34%),
    #080c14;
}

button {
  font: inherit;
}

.timer-card {
  width: min(100%, 520px);
  padding: 48px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 32px;
  background: rgba(17, 24, 39, 0.78);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(20px);
}

.eyebrow {
  margin: 0 0 12px;
  color: #60a5fa;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.18em;
}

h1 {
  margin: 0 0 32px;
  font-size: clamp(1.4rem, 5vw, 2rem);
}

.preset-buttons {
  display: flex;
  justify-content: center;
  gap: 8px;
}

.preset {
  padding: 9px 16px;
  color: #94a3b8;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
  transition: 160ms ease;
}

.preset:hover,
.preset.active {
  color: #fff;
  border-color: rgba(96, 165, 250, 0.55);
  background: rgba(59, 130, 246, 0.16);
}

.timer {
  margin: 34px 0 8px;
  font-size: clamp(4.5rem, 20vw, 7.5rem);
  font-variant-numeric: tabular-nums;
  font-weight: 750;
  letter-spacing: -0.07em;
  line-height: 1;
}

.separator {
  color: #60a5fa;
}

.status {
  min-height: 24px;
  margin: 16px 0 32px;
  color: #94a3b8;
}

.controls {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 12px;
}

.controls button {
  min-height: 52px;
  border-radius: 16px;
  border: 0;
  font-weight: 700;
  cursor: pointer;
  transition:
    transform 120ms ease,
    filter 120ms ease;
}

.controls button:hover {
  filter: brightness(1.1);
}

.controls button:active {
  transform: scale(0.98);
}

.primary {
  color: #07101f;
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
}

.secondary {
  color: #e2e8f0;
  background: rgba(255, 255, 255, 0.08);
}

@media (max-width: 520px) {
  .timer-card {
    padding: 36px 22px;
    border-radius: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}