:root {
  --board-bg: #0f1a17;
  --board-panel: #142621;
  --board-panel-border: #223832;
  --led-amber: #ffb703;
  --led-amber-dim: #8a6a1c;
  --led-green: #3ddc84;
  --text-muted: #7c9187;
  --text-on-board: #d8e6e0;
  --font-mono: ui-monospace, "SF Mono", "Consolas", "Menlo", monospace;
  --font-sans: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--board-bg);
  color: var(--text-on-board);
  font-family: var(--font-sans);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px 48px;
}

.bus-board {
  width: 100%;
  max-width: 420px;
  background: var(--board-panel);
  border: 1px solid var(--board-panel-border);
  border-radius: 12px;
  padding: 20px 18px 16px;
}

.bus-board__header {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-bottom: 1px solid var(--board-panel-border);
  padding-bottom: 12px;
  margin-bottom: 12px;
}

.bus-board__stop {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.bus-board__tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.bus-board__tab {
  font-family: inherit;
  font-size: 0.78rem;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--board-panel-border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.bus-board__tab:hover,
.bus-board__tab:focus-visible {
  border-color: var(--led-green);
}

.bus-board__tab--active {
  color: var(--led-green);
  border-color: var(--led-green);
  background: rgba(61, 220, 132, 0.08);
}

.bus-board__daytype {
  margin: 0 0 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

.bus-board__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.bus-board__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 8px;
  border-radius: 6px;
  color: var(--text-muted);
}

.bus-board__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.bus-board__routes {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.bus-board__route-badge {
  font-size: 0.68rem;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--board-panel-border);
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.bus-board__item--next .bus-board__route-badge {
  color: var(--led-amber);
  border-color: var(--led-amber-dim);
}

.bus-board__item--next {
  color: var(--led-amber);
  background: rgba(255, 183, 3, 0.08);
}

.bus-board__time {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.bus-board__item--next .bus-board__time {
  font-size: 1.9rem;
  text-shadow: 0 0 10px rgba(255, 183, 3, 0.55);
}

.bus-board__countdown {
  font-size: 0.85rem;
  font-family: var(--font-mono);
}

.bus-board__empty {
  margin: 16px 8px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.bus-board__footer {
  margin-top: 14px;
  border-top: 1px solid var(--board-panel-border);
  padding-top: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.bus-board__refresh {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--led-green);
  background: transparent;
  border: 1px solid var(--board-panel-border);
  border-radius: 999px;
  padding: 4px 12px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.bus-board__refresh:hover,
.bus-board__refresh:focus-visible {
  border-color: var(--led-green);
}

.bus-board__refresh:disabled {
  color: var(--text-muted);
  border-color: var(--board-panel-border);
  cursor: default;
}

.bus-board__updated {
  margin: 0;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

@media (prefers-reduced-motion: no-preference) {
  .bus-board__item--next .bus-board__time {
    animation: glow 2.4s ease-in-out infinite;
  }
}

@keyframes glow {
  0%, 100% { text-shadow: 0 0 10px rgba(255, 183, 3, 0.55); }
  50% { text-shadow: 0 0 16px rgba(255, 183, 3, 0.85); }
}

.bus-board__notice {
  width: 100%;
  max-width: 420px;
  margin: 12px auto 0;
  padding: 0 4px;
  font-size: 0.68rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.bus-board__contact-link {
  color: var(--led-green);
  text-decoration: underline;
}