/* ===== Theme Variables (aligned with sibling sites: project-nav / hthp-patent) ===== */
:root {
  color-scheme: light dark;
  --bg: #fefce8;
  --surface: #ffffff;
  --surface-2: #f5f5f4;
  --text: #1c1917;
  --muted: #78716c;
  --border: #e7e5e4;
  --primary: #d97706;
  --primary-hover: #b45309;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --tag-bg: #fef3c7;
  --tag-text: #92400e;
  --success: #16a34a;
  --danger: #dc2626;
  --track-bg: #f5f5f4;
  --track-fill: #f59e0b;
  --track-bound: #d6d3d1;
  --dir-a: #d97706;
  --dir-c: #2563eb;
  --dir-a-soft: #fef3c7;
  --dir-c-soft: #dbeafe;
  --header-bg: linear-gradient(135deg, #fef3c7 0%, #fefce8 40%, #fffbeb 100%);
  --shadow: 0 18px 40px rgba(28, 25, 23, .06);
  --code-bg: #1c1917;
  --code-text: #fafaf9;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #1c1917;
  --surface: #292524;
  --surface-2: #44403c;
  --text: #fafaf9;
  --muted: #a8a29e;
  --border: #44403c;
  --primary: #f59e0b;
  --primary-hover: #fbbf24;
  --accent: #d97706;
  --accent-light: #451a03;
  --tag-bg: #451a03;
  --tag-text: #fde68a;
  --success: #22c55e;
  --danger: #f87171;
  --track-bg: #3f3a36;
  --track-fill: #fbbf24;
  --track-bound: #78716c;
  --dir-a: #fbbf24;
  --dir-c: #60a5fa;
  --dir-a-soft: #451a03;
  --dir-c-soft: #172554;
  --header-bg: linear-gradient(135deg, #451a03 0%, #1c1917 40%, #292524 100%);
  --shadow: none;
  --code-bg: #0c0a09;
  --code-text: #fafaf9;
}

@media (prefers-color-scheme: dark) {
  html[data-theme="system"] {
    color-scheme: dark;
    --bg: #1c1917;
    --surface: #292524;
    --surface-2: #44403c;
    --text: #fafaf9;
    --muted: #a8a29e;
    --border: #44403c;
    --primary: #f59e0b;
    --primary-hover: #fbbf24;
    --accent: #d97706;
    --accent-light: #451a03;
    --tag-bg: #451a03;
    --tag-text: #fde68a;
    --success: #22c55e;
    --danger: #f87171;
    --track-bg: #3f3a36;
    --track-fill: #fbbf24;
    --track-bound: #78716c;
    --dir-a: #fbbf24;
    --dir-c: #60a5fa;
    --dir-a-soft: #451a03;
    --dir-c-soft: #172554;
    --header-bg: linear-gradient(135deg, #451a03 0%, #1c1917 40%, #292524 100%);
    --shadow: none;
    --code-bg: #0c0a09;
    --code-text: #fafaf9;
  }
}

:root,
html[data-theme="dark"],
html[data-theme="system"] {
  --c-bg: var(--bg);
  --c-fg: var(--text);
  --c-accent: var(--primary);
  --c-surface: var(--surface);
  --c-muted: var(--muted);
  --c-border: var(--border);
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background .3s ease, color .3s ease;
  overflow-x: hidden;
}

a {
  color: var(--primary);
  text-decoration: none;
}
a:hover {
  color: var(--primary-hover);
}

/* ===== Header ===== */
.site-header {
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  padding: 48px 24px 40px;
  transition: background .3s ease;
}

.hero {
  max-width: 1520px;
  margin: 0 auto;
}

.eyebrow {
  font-size: .875rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 8px;
}

.hero__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--text);
  margin-bottom: 12px;
}

.clock-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

.live-clock {
  font-size: 2.2rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
  color: var(--primary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 8px 20px;
  box-shadow: var(--shadow);
}

.sync-badge {
  font-size: .72rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--muted);
  border: 1px solid var(--border);
}
.sync-badge--ok {
  background: var(--success);
  color: #fff;
  border-color: transparent;
}
.sync-badge--err {
  background: var(--tag-bg);
  color: var(--tag-text);
}

.hero__desc {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 760px;
}

.hero__desc b {
  color: var(--primary);
}

/* ===== Main Shell ===== */
.app-shell {
  max-width: 1520px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

/* ===== Toolbar ===== */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.toolbar__status {
  flex: 1;
  min-width: 200px;
  font-size: .95rem;
  color: var(--muted);
}

.toolbar__status strong {
  color: var(--text);
  font-weight: 700;
}

.theme-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .875rem;
  color: var(--muted);
  flex-shrink: 0;
}

#themeSelect {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font-size: .875rem;
  font-family: inherit;
  cursor: pointer;
}
#themeSelect:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ===== Panels ===== */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  margin-bottom: 28px;
  box-shadow: var(--shadow);
}

.panel__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.panel__title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 4px;
}

.panel__hint {
  font-size: .85rem;
  color: var(--muted);
  margin-bottom: 20px;
}

/* ===== Buttons (global, aligned with sibling sites) ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: .85rem;
  font-weight: 600;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: all .15s ease;
  border: none;
}

.btn--outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn--outline:hover {
  background: var(--accent-light);
  color: var(--primary-hover);
}
.btn--outline[aria-expanded="true"] {
  background: var(--tag-bg);
  color: var(--tag-text);
}

/* ===== Route Track (bidirectional, two lanes) ===== */
.route-track {
  position: relative;
  padding: 8px 6px 6px;
}

.route-track__labels {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .9rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.route-track__end {
  background: var(--accent-light);
  color: var(--tag-text);
  padding: 3px 12px;
  border-radius: 999px;
  font-size: .8rem;
}

.route-track__lanes {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 6px;
}

/* Each lane: a horizontal progress line with absolute-positioned bus markers */
.lane {
  position: relative;
  height: 46px;
  border-radius: 999px;
}

.lane--a {
  background: var(--dir-a-soft);
  border: 1px solid color-mix(in srgb, var(--dir-a) 35%, transparent);
}

.lane--c {
  background: var(--dir-c-soft);
  border: 1px solid color-mix(in srgb, var(--dir-c) 35%, transparent);
}

/* bus marker: pill (rounded rect, r=1/2 height) with a direction tip */
.bus-marker {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 3;
  will-change: left;
  cursor: default;
}

.bus-marker__pill {
  position: relative;
  display: flex;
  align-items: center;
  gap: 4px;
  height: 26px;
  padding: 0 10px;
  border-radius: 13px;
  border: 2px solid var(--surface);
  box-shadow: 0 2px 6px rgba(0, 0, 0, .18);
  background: var(--dir-a);
  color: #fff;
  font-size: .72rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.lane--c .bus-marker__pill {
  background: var(--dir-c);
}

.bus-marker__emoji {
  font-size: 15px;
  line-height: 1;
  transform: translateZ(0);
}

.lane--a .bus-marker__emoji {
  transform: rotate(180deg);
}

.bus-marker__time {
  display: none;
}

/* tip: a small triangle pointer on the pill, direction-dependent */
.bus-marker__tip {
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
}

.lane--c .bus-marker__tip {
  border-top: 6px solid var(--dir-c);
  border-bottom: none;
  margin-bottom: 1px;
}

.lane--a .bus-marker__tip {
  border-bottom: 6px solid var(--dir-a);
  border-top: none;
  margin-top: 1px;
  order: 3;
}

/* tooltip on hover / forced via .show-all */
.bus-marker__tooltip {
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--code-bg);
  color: var(--code-text);
  font-size: .72rem;
  font-weight: 600;
  white-space: nowrap;
  padding: 4px 10px;
  border-radius: 8px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .15s ease, visibility .15s ease;
  z-index: 5;
  box-shadow: var(--shadow);
}

.lane--c .bus-marker__tooltip {
  top: auto;
  bottom: calc(100% + 6px);
}

.bus-marker:hover .bus-marker__tooltip,
.route-track.show-all .bus-marker__tooltip {
  opacity: 1;
  visibility: visible;
}

.route-track.show-all .bus-marker__time {
  display: inline;
}

.route-track__empty {
  text-align: center;
  color: var(--muted);
  font-size: .9rem;
  padding: 10px 0;
}

/* ===== Running detail (collapsed by default) ===== */
.running-detail {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px dashed var(--border);
}

.running-detail__title {
  font-size: .9rem;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 12px;
}

.running-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.running-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-2);
}

.running-item__head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.running-item__time {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

.running-item__route {
  font-weight: 600;
  color: var(--text);
}

.running-item__meta {
  font-size: .8rem;
  color: var(--muted);
  margin-left: auto;
  font-variant-numeric: tabular-nums;
}

.running-item__bar {
  height: 10px;
  background: var(--track-bg);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--track-bound);
}

.running-item__fill {
  height: 100%;
  border-radius: 999px;
  background: var(--track-fill);
  transition: width .5s linear;
}

.running-item__fill--a {
  background: var(--dir-a);
}

.running-item__fill--c {
  background: var(--dir-c);
}

.running-item__fill--rainbow {
  background: linear-gradient(90deg, #f87171, #fbbf24, #4ade80, #60a5fa, #a78bfa);
}

.running-item__foot {
  display: flex;
  justify-content: space-between;
  font-size: .8rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* ===== Amap real-time links ===== */
.amap-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.amap-links__label {
  font-size: .78rem;
  font-weight: 600;
  color: var(--muted);
}

.amap-links__btn {
  font-size: .8rem;
  padding: 6px 14px;
}

/* ===== Panel note (gray small print) ===== */
.panel__note {
  margin-top: 14px;
  font-size: .75rem;
  color: var(--muted);
  line-height: 1.5;
}

/* ===== Filter chips ===== */
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 500;
  font-family: inherit;
  background: var(--surface);
  color: var(--muted);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all .15s ease;
  user-select: none;
}
.filter-chip:hover {
  border-color: var(--primary);
  color: var(--text);
}
.filter-chip:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.filter-chip--active {
  background: var(--tag-bg);
  color: var(--tag-text);
  border-color: var(--primary);
  font-weight: 600;
}
.filter-chip--norainbow {
  border-style: dashed;
}
.filter-chip--norainbow.filter-chip--active {
  border-style: solid;
}

/* ===== Trip list ===== */
.trip-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.trip-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  transition: border-color .15s ease, transform .15s ease;
}

.trip-item--next {
  border-color: var(--primary);
  background: var(--accent-light);
}

.trip-item__meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 120px;
}

.trip-item__time {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  min-width: 64px;
}

.trip-item__route {
  font-weight: 600;
  color: var(--text);
  flex: 1;
}

.trip-item__arrow {
  color: var(--muted);
  margin: 0 4px;
}

.trip-item__price {
  font-size: .85rem;
  font-weight: 600;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* ===== Ticket badge ===== */
.trip-item__ticket {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 700;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.ticket--free {
  background: var(--success);
  color: #fff;
}

.ticket--rainbow {
  background: linear-gradient(90deg, #f87171, #fbbf24, #4ade80, #60a5fa, #a78bfa);
  color: #fff;
}

.ticket--wait {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}

.ticket--onsale {
  background: var(--accent);
  color: #fff;
  animation: pulse 1.2s ease-in-out infinite;
}

.ticket--soldout {
  background: var(--danger);
  color: #fff;
}

.ticket--closed {
  background: var(--surface-2);
  color: var(--muted);
  border: 1px solid var(--border);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .6; }
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 700;
  background: var(--tag-bg);
  color: var(--tag-text);
}

.tag--free {
  background: var(--success);
  color: #fff;
}

.tag--paid {
  background: var(--surface-2);
  color: var(--muted);
  border: 1px solid var(--border);
}

.trip-item__countdown {
  font-size: .8rem;
  font-weight: 600;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  min-width: 96px;
  text-align: right;
}

.trip-item__countdown--soon {
  color: var(--primary);
}

/* ===== Empty state ===== */
.empty-state {
  text-align: center;
  padding: 40px 24px;
  color: var(--muted);
}
.empty-state h3 {
  font-size: 1.15rem;
  color: var(--text);
  margin-bottom: 6px;
}

/* ===== Footer ===== */
.site-footer {
  max-width: 1520px;
  margin: 0 auto;
  padding: 32px 24px;
  text-align: center;
  font-size: .85rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}
.site-footer p {
  margin-bottom: 6px;
}

/* ===== Accessibility ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  padding: 8px 20px;
  background: var(--primary);
  color: #fff;
  border-radius: 0 0 10px 10px;
  font-size: .9rem;
  font-weight: 600;
  z-index: 1000;
  text-decoration: none;
  transition: top .15s ease;
}
.skip-link:focus {
  top: 0;
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 1.8rem;
  }
  .live-clock {
    font-size: 1.5rem;
    padding: 6px 14px;
  }
  .panel {
    padding: 16px;
  }
  .trip-item {
    flex-wrap: wrap;
    gap: 8px 10px;
    align-items: flex-start;
  }
  .trip-item__meta {
    flex-basis: 100%;
    min-width: 0;
  }
  .trip-item__countdown {
    text-align: left;
    min-width: 0;
  }
  .amap-links {
    flex-direction: column;
    align-items: stretch;
  }
}