:root {
  --accent: #8b5cf6;
  --bg: #0b0b10;
  --fg: #e5e7eb;
  --radius: 16px;
  --font: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif;
}

html {
  font-family: var(--font);
}

html, body {
  height: 100%;
}

html[data-scheme="dark"] body {
  background: var(--bg);
  color: var(--fg);
}

html[data-scheme="light"] body {
  background: var(--bg);
  color: var(--fg);
}

.container {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 2rem;
}

.card {
  width: min(900px, 95vw);
  background: color-mix(in oklab, var(--bg), white 7%);
  border: 1px solid color-mix(in oklab, var(--bg), white 15%);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.shadow-sm { box-shadow: 0 2px 10px rgba(0,0,0,.15); }
.shadow-md { box-shadow: 0 10px 25px rgba(0,0,0,.2); }
.shadow-lg { box-shadow: 0 30px 60px rgba(0,0,0,.25); }

h1.title {
  font-family: inherit;
  font-size: clamp(2rem, 4vw + 1rem, 4rem);
  line-height: 1.1;
  margin: 0 0 0.5rem 0;
}

.subtitle {
  margin-top: 0;
  opacity: .8;
}

.countdown {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(0, 1fr);
  gap: 1rem;
  margin: 1.5rem 0;
}

.countdown .unit {
  display: grid;
  place-items: center;
  padding: 1rem;
  border-radius: calc(var(--radius) - 6px);
  border: 1px solid color-mix(in oklab, var(--bg), white 15%);
  background: color-mix(in oklab, var(--bg), white 5%);
}

.countdown .unit span {
  font-family: inherit;
  font-size: clamp(1.8rem, 5vw + 0.5rem, 4rem);
  font-variant-numeric: tabular-nums;
}

.countdown .unit label {
  font-family: inherit;
  opacity: .7;
  font-size: 0.9rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.25rem;
}

.field {
  display: grid;
  gap: 0.5rem;
}

.field input[type="text"],
.field input[type="datetime-local"],
.field input[type="number"],
.field select,
.field input[type="color"] {
  padding: 0.6rem 0.75rem;
  border-radius: calc(var(--radius) - 10px);
  border: 1px solid color-mix(in oklab, var(--bg), white 20%);
  background: color-mix(in oklab, var(--bg), white 7%);
  color: inherit;
  font-family: var(--font);
}

.actions {
  grid-column: 1 / -1;
  margin-top: 0.5rem;
}

button, .actions button, .share a, .share button {
  font-size: inherit;
  appearance: none;
  border: 0;
  padding: 0.75rem 1rem;
  border-radius: calc(var(--radius) - 8px);
  background: var(--accent);
  color: var(--fg);
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

button:hover, .share a:hover, .share button:hover {
  filter: brightness(1.05);
}

.muted {
  opacity: .8;
  font-size: 0.95rem;
}

.share {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  margin-top: 0.5rem;
}

@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
  .countdown { grid-template-columns: repeat(2, minmax(0,1fr)); }
}