:root {
  --fg: #1a1a1a;
  --bg: #fafafa;
  --card-bg: #ffffff;
  --border: #e0e0e0;
  --muted: #6b6b6b;
  --accent: #2f6f4f;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.4;
}

header {
  padding: 1.25rem 1rem 0.5rem;
  text-align: center;
}

header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  padding: 0.75rem 1rem;
}

fieldset {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.9rem;
  align-items: center;
}

legend {
  font-size: 0.8rem;
  color: var(--muted);
  padding: 0 0.3rem;
}

fieldset label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  white-space: nowrap;
}

.dept-swatch {
  display: inline-block;
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 3px;
  border: 1px solid rgba(0,0,0,0.15);
}

.month-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
}

.month-nav button {
  border: 1px solid var(--border);
  background: var(--card-bg);
  border-radius: 6px;
  padding: 0.35rem 0.75rem;
  font-size: 1rem;
  cursor: pointer;
}

.month-nav button:hover {
  background: var(--border);
}

#current-month {
  font-weight: 600;
  min-width: 10ch;
  text-align: center;
  text-transform: capitalize;
}

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

.empty-state {
  text-align: center;
  color: var(--muted);
  padding: 2rem 1rem;
}

.course-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-left-width: 6px;
  border-radius: 8px;
  padding: 0.75rem 0.9rem;
  margin-bottom: 0.6rem;
}

.course-card .row1 {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.course-card .nom {
  font-weight: 600;
}

.course-card .date {
  font-size: 0.85rem;
  color: var(--muted);
  white-space: nowrap;
}

.course-card .meta {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

.course-card .notes {
  font-size: 0.85rem;
  margin-top: 0.3rem;
  color: var(--fg);
}

.course-card .links {
  display: flex;
  gap: 0.9rem;
  margin-top: 0.4rem;
}

.course-card .site-link {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--accent);
  text-decoration: none;
}

.course-card .site-link:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  padding: 1.5rem 1rem 2rem;
  color: var(--muted);
  font-size: 0.85rem;
}

footer a {
  color: var(--accent);
}

@media (max-width: 480px) {
  header h1 { font-size: 1.25rem; }
  .course-card .row1 { flex-direction: column; align-items: flex-start; }
}