:root {
  color-scheme: light;
  --bg-1: #f6f0e7;
  --bg-2: #e6f0ef;
  --ink: #1d1d1f;
  --muted: #5d5d61;
  --accent: #167d66;
  --accent-2: #f2b45d;
  --border: #ded7cf;
  --chip-day: #fff7ec;
  --chip-night: #1e2a35;
  --chip-night-ink: #f7f2e9;
  --chip-day-ink: #1e1e1f;
  --badge: #fef1dc;
  --badge-ink: #1e1e1f;
  --badge-outline: #b77422;
  --night-band: #22303b;
  --day-band: #fdf3df;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  --radius: 18px;
  --radius-pill: 999px;
  --track-bg: linear-gradient(
    90deg,
    var(--night-band) 0%,
    var(--night-band) 29.1667%,
    var(--day-band) 29.1667%,
    var(--day-band) 79.1667%,
    var(--night-band) 79.1667%,
    var(--night-band) 100%
  );
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Sora", "Avenir Next", "Helvetica Neue", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, rgba(242, 180, 93, 0.2), transparent 45%),
    radial-gradient(circle at 80% 10%, rgba(22, 125, 102, 0.12), transparent 50%),
    linear-gradient(180deg, var(--bg-1), var(--bg-2));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: radial-gradient(rgba(29, 29, 31, 0.04) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.3;
  pointer-events: none;
  z-index: -1;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

.sticky-stack {
  position: sticky;
  top: 12px;
  z-index: 12;
  padding: 16px 18px;
  border-radius: 20px;
  background: rgba(246, 240, 231, 0.98);
  border: 1px solid rgba(222, 215, 207, 0.9);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.sticky-body {
  position: relative;
  margin-top: 12px;
}

.app-header {
  display: grid;
  grid-template-columns: minmax(160px, 1fr) minmax(200px, 1.2fr) minmax(140px, 0.8fr);
  gap: 16px;
  align-items: center;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
}

.title {
  margin: 0 0 6px;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

.mode-pills {
  display: inline-flex;
  gap: 8px;
}

.mode-pill {
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: #fff;
  color: var(--muted);
  cursor: pointer;
}

.mode-pill.is-active {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
}

.header-center {
  text-align: center;
}

.ref-line {
  font-weight: 600;
  font-size: 1rem;
}

.ref-sub {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.9rem;
}

.header-right {
  text-align: right;
}

.scrubber {
  margin: 0;
  padding: 12px 0 0;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 0;
  border-left: none;
  border-right: none;
  border-bottom: none;
  background: transparent;
  box-shadow: none;
  max-height: 220px;
  overflow: hidden;
}

.scrubber.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.scrubber.is-collapsed {
  display: none;
}

.info-card {
  position: absolute;
  inset: 0;
  z-index: 1;
  margin: 0;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow);
  max-height: 500px;
  overflow: hidden;
}

.info-card.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.info-card.is-expanded {
  position: relative;
  inset: auto;
  max-height: none;
  overflow: visible;
}

.info-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.info-title {
  font-weight: 700;
  margin-bottom: 2px;
}

.info-tip {
  font-size: 0.9rem;
  color: var(--muted);
}

.info-btn {
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: #fff;
  font-weight: 600;
  cursor: pointer;
}

.info-panel-body {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.info-panel-body ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  display: grid;
  gap: 6px;
}

.scrub-readout {
  display: none;
}

.scrub-time {
  font-size: 2rem;
  font-weight: 700;
  font-family: "Space Mono", "Menlo", "Consolas", monospace;
  font-variant-numeric: tabular-nums;
}

.scrub-context {
  color: var(--muted);
  font-size: 0.95rem;
}

.scrub-control {
  margin-top: 12px;
}

.scrub-control input[type="range"] {
  width: 100%;
  margin: 8px 0 4px;
  appearance: none;
  background: transparent;
}

.scrub-control input[type="range"]:focus {
  outline: none;
}

.scrub-control input[type="range"]::-webkit-slider-runnable-track {
  height: 10px;
  border-radius: 999px;
  background: var(--track-bg);
  border: 1px solid rgba(34, 48, 59, 0.2);
}

.scrub-control input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--accent);
  margin-top: -7px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.scrub-control input[type="range"]::-moz-range-track {
  height: 10px;
  border-radius: 999px;
  background: var(--track-bg);
  border: 1px solid rgba(34, 48, 59, 0.2);
}

.scrub-control input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--accent);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.scrub-ticks {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--muted);
}

.scrub-note {
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--muted);
}

.regions {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 12px;
}

.app-footer {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.footer-card {
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow);
  font-size: 0.9rem;
  color: var(--muted);
}

.footer-card h3 {
  margin: 0 0 6px;
  font-size: 0.95rem;
  color: var(--ink);
}

.footer-card p {
  margin: 4px 0;
}

.footer-card a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.footer-card a:hover,
.footer-card a:focus-visible {
  text-decoration: underline;
}

.region {
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.region h2 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.chip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}

.city-chip {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px 12px 10px;
  text-align: left;
  background: var(--chip-day);
  color: var(--chip-day-ink);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.city-chip.is-night {
  background: var(--chip-night);
  color: var(--chip-night-ink);
  border-color: rgba(255, 255, 255, 0.1);
}

.city-chip.is-reference {
  border-color: var(--accent);
  box-shadow: 0 8px 20px rgba(22, 125, 102, 0.2);
  transform: translateY(-2px);
}

.city-chip.is-reference::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 18px;
  border: 2px solid rgba(22, 125, 102, 0.5);
  pointer-events: none;
}

.city-chip:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}

.chip-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.chip-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.chip-badges {
  display: flex;
  gap: 6px;
}

.badge {
  padding: 2px 6px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  background: var(--badge);
  color: var(--badge-ink);
}

.badge.reference {
  background: var(--accent);
  color: #fff;
  letter-spacing: 0.08em;
}

.badge.delta {
  border: 1px solid var(--badge-outline);
  background: transparent;
}

.city-chip.is-night .badge {
  background: rgba(255, 255, 255, 0.1);
  color: var(--chip-night-ink);
}

.city-chip.is-night .badge.delta {
  border-color: rgba(255, 255, 255, 0.45);
}

.city-chip.is-night .badge.reference {
  background: #1bc29b;
  color: #0d2a22;
}

.chip-time {
  margin-top: 8px;
  font-family: "Space Mono", "Menlo", "Consolas", monospace;
  font-size: 1.25rem;
  font-variant-numeric: tabular-nums;
}

.chip-sub {
  margin-top: 4px;
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--muted);
}

.city-chip.is-night .chip-sub {
  color: rgba(247, 242, 233, 0.7);
}

@media (max-width: 820px) {
  .app-header {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .header-center,
  .header-right {
    text-align: left;
  }

  .scrubber {
    margin-top: 10px;
    padding: 10px 0 0;
  }

  .scrub-note {
    margin-top: 6px;
  }
}

@media (max-width: 520px) {
  .app {
    padding: 16px 12px 32px;
  }

  .title {
    font-size: 1.3rem;
  }

  .scrub-time {
    font-size: 1.7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
  }

  .city-chip,
  .mode-pill {
    transition: none;
  }
}