h1 {
  margin-top: 32px;
  margin-bottom: 8px;
  font-size: 2rem;
}

.lede {
  color: var(--muted);
  margin-top: 0;
  margin-bottom: 28px;
  max-width: 60ch;
}

.tool {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  align-items: start;
}

.tool__controls,
.tool__output {
  display: flex;
  flex-direction: column;
}

label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  display: block;
  margin-bottom: 6px;
}

input[type="text"], input[type="date"], input[type="time"] {
  width: 100%;
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
  margin-bottom: 16px;
}

.countdown-label {
  margin: 0 0 12px;
  font-weight: 600;
  text-align: center;
  min-height: 1.3em;
}

.countdown-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.countdown-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 4px;
}

.countdown-value {
  font-size: 1.6rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.countdown-unit-label {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-top: 4px;
}

.sentence {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

.hint {
  color: #c0392b;
  font-size: 0.85rem;
  margin-top: -6px;
  margin-bottom: 10px;
}

.faq { margin-top: 48px; max-width: 70ch; }

.faq h2 { font-size: 1.3rem; margin-top: 32px; }

details {
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
}

details summary {
  cursor: pointer;
  font-weight: 600;
}

@media (max-width: 640px) {
  .tool { grid-template-columns: 1fr; }
  .countdown-grid { grid-template-columns: repeat(4, 1fr); }
}