:root {
  --bg: #fafaf7;
  --fg: #1a1a1a;
  --muted: #666;
  --border: #e3e3df;
  --hot: #d7263d;
  --hot-bg: #fff0f1;
  --cold: #1d6fb8;
  --cold-bg: #eaf3fb;
  --ok: #2e7d32;
  --ok-bg: #eef6ee;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15161a;
    --fg: #f1f1ee;
    --muted: #9a9a96;
    --border: #2a2b30;
    --hot-bg: #2a151a;
    --cold-bg: #14202d;
    --ok-bg: #15251a;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
}

a { color: inherit; }

.hero {
  text-align: center;
  padding: 2rem 0;
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 4rem);
  margin: 0 0 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.status {
  border-radius: 16px;
  padding: 2rem 1rem;
  border: 1px solid var(--border);
}

.status .answer {
  font-size: clamp(2.5rem, 10vw, 4.5rem);
  font-weight: 800;
  margin: 0;
  letter-spacing: -0.02em;
}

.status.loading .answer { color: var(--muted); font-weight: 500; font-size: 1.25rem; }

.status.no {
  background: var(--ok-bg);
}
.status.no .answer { color: var(--ok); }

.status.heat {
  background: var(--hot-bg);
}
.status.heat .answer { color: var(--hot); }

.status.cold {
  background: var(--cold-bg);
}
.status.cold .answer { color: var(--cold); }

.status.both {
  background: linear-gradient(135deg, var(--hot-bg) 0%, var(--cold-bg) 100%);
}
.status.both .answer { color: var(--fg); }

.status .label {
  margin: 0.5rem 0 0;
  font-size: 1rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.8;
}

.status.error {
  background: var(--hot-bg);
}
.status.error .answer {
  font-size: 1.25rem;
  color: var(--hot);
  font-weight: 500;
}

.details {
  margin-top: 2rem;
}

.wave-group {
  margin-bottom: 2rem;
}

.wave-group h2 {
  font-size: 1.25rem;
  margin: 0 0 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.wave-group .badge {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.wave-group.heat .badge { background: var(--hot); color: #fff; }
.wave-group.cold .badge { background: var(--cold); color: #fff; }

.place-group {
  margin-bottom: 1.25rem;
}

.place-group h3 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 0 0 0.5rem;
  font-weight: 600;
}

.station-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.5rem;
}

.station {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}

.station-name {
  font-weight: 600;
}

.station-dates {
  color: var(--muted);
  font-size: 0.85rem;
}

.station-delta {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.heat .station-delta { color: var(--hot); }
.cold .station-delta { color: var(--cold); }

.updated {
  margin-top: 2rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

.muted { color: var(--muted); }

footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 1.25rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

footer nav {
  margin-bottom: 0.5rem;
}

footer nav a {
  margin: 0 0.5rem;
}

footer p { margin: 0.25rem 0; }

.prose h1 { font-size: 2rem; margin: 0.5rem 0 1rem; }
.prose h2 { font-size: 1.25rem; margin: 1.75rem 0 0.5rem; }
.prose p, .prose ul { margin: 0.5rem 0; }
.prose ul { padding-left: 1.25rem; }
.prose code {
  background: var(--border);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.9em;
}