:root {
  color-scheme: light;
  --bg: #f6f7fb;
  --panel: #fff;
  --text: #101521;
  --muted: #526070;
  --accent: #1d4ed8;
  --accent-text: #fff;
  --border: #d9e0ea;
  --soft: #eef2f7;
}

@media (prefers-color-scheme: dark) {
  html[data-theme="system"] {
    color-scheme: dark;
    --bg: #07111f;
    --panel: #101b2d;
    --text: #edf5ff;
    --muted: #9fb0c6;
    --accent: #67e8f9;
    --accent-text: #001018;
    --border: #263449;
    --soft: #16243a;
  }
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #07111f;
  --panel: #101b2d;
  --text: #edf5ff;
  --muted: #9fb0c6;
  --accent: #67e8f9;
  --accent-text: #001018;
  --border: #263449;
  --soft: #16243a;
}

html[data-theme="light"] {
  color-scheme: light;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, sans-serif;
}

header,
main {
  max-width: 1100px;
  margin: auto;
  padding: 1rem;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.board {
  background: var(--panel);
  border-radius: 18px;
  padding: 1.25rem;
  box-shadow: 0 10px 30px #0002;
}

#flight,
.route {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: clamp(2rem, 8vw, 5rem);
  margin: .2rem 0;
}

.route {
  display: flex;
  gap: 1rem;
  color: var(--accent);
}

.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
}

.facts div,
.card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: .8rem;
  background: var(--soft);
  color: var(--text);
}

.facts dt {
  color: var(--muted);
  font-size: .8rem;
}

.facts dd {
  margin: 0;
  font-weight: 700;
}

.nearby {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.card {
  cursor: pointer;
  text-align: left;
}

body[data-loading="true"] .card {
  pointer-events: none;
}

.card:focus,
.closest-button:focus,
.theme-toggle:focus {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.closest-button,
.theme-toggle {
  border: 0;
  border-radius: 999px;
  padding: .65rem 1rem;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 700;
}

.closest-button {
  margin-bottom: .75rem;
}

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  background: rgb(0 0 0 / 45%);
}

.loading-overlay[hidden] {
  display: none;
}

.loading-dialog {
  display: flex;
  align-items: center;
  gap: .6rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 18px 50px #0006;
  font-weight: 700;
}

.loading-dialog span {
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 480px) {
  header {
    align-items: flex-start;
    gap: .5rem;
    flex-direction: column;
  }

  .route {
    font-size: 2rem;
  }
}