:root {
  --bg: #0f1419;
  --card: #1a2332;
  --text: #e7ecf3;
  --muted: #8b9bb4;
  --border: #2a3548;
  --today: #fff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding: 1.5rem;
  line-height: 1.4;
}
header h1 { margin: 0 0 0.25rem; font-size: 1.5rem; }
.sub { margin: 0 0 1.25rem; color: var(--muted); font-size: 0.9rem; }
code { background: var(--card); padding: 0.1rem 0.35rem; border-radius: 4px; }
.legend {
  list-style: none; padding: 0; margin: 0 0 1.5rem;
  display: flex; flex-wrap: wrap; gap: 0.75rem 1.25rem;
}
.legend li { display: flex; align-items: center; gap: 0.4rem; font-size: 0.85rem; }
.swatch {
  width: 0.85rem; height: 0.85rem; border-radius: 3px; flex-shrink: 0;
}
.months {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.month {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem;
}
.month h2 { margin: 0 0 0.6rem; font-size: 1rem; font-weight: 600; }
.dow, .grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 3px;
}
.dow span {
  text-align: center; font-size: 0.7rem; color: var(--muted); padding: 0.2rem 0;
}
.day {
  aspect-ratio: 1;
  border-radius: 6px;
  background: #121821;
  font-size: 0.75rem;
  display: flex; flex-direction: column; align-items: center; justify-content: flex-start;
  padding: 0.2rem;
  position: relative;
  min-height: 2.4rem;
}
.day.empty { background: transparent; }
.day .n { color: var(--muted); }
.day.has-trip .n { color: var(--text); font-weight: 600; }
.bars {
  display: flex; flex-direction: column; gap: 2px; width: 100%; margin-top: 2px;
}
.bar {
  height: 4px; border-radius: 2px; width: 100%;
}
.notes { margin-top: 2rem; }
.notes h2 { font-size: 1rem; margin: 0 0 0.5rem; }
#trip-list { padding-left: 1.1rem; color: var(--muted); }
#trip-list li { margin-bottom: 0.35rem; }
#trip-list strong { color: var(--text); }
@media (min-width: 900px) {
  .months { grid-template-columns: repeat(3, 1fr); }
}