/* Syllabus library: filters, semester chips and cards */
.syllabus-filters { background: #fff; padding: 1.25rem; border-radius: 12px; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1); margin-bottom: 2rem; }
.syllabus-search-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 0.75rem; }
#syllabus-search, #syllabus-sort { padding: 12px 14px; border: 2px solid #dadce0; border-radius: 10px; font: inherit; font-size: 16px; background: #fff; color: #202124; }
#syllabus-search:focus-visible, #syllabus-sort:focus-visible { outline: none; border-color: #1a73e8; box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.15); }

.syllabus-chip-row { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.9rem; }
.filter-btn { display: inline-flex; align-items: center; gap: 6px; min-height: 36px; padding: 6px 14px; border: 1px solid #dadce0; border-radius: 999px; background: #fff; color: #3c4043; font: inherit; font-size: 0.875rem; font-weight: 500; cursor: pointer; }
.filter-btn:hover { background: #f1f3f4; }
.filter-btn.active { background: #e8f0fe; border-color: #1a73e8; color: #174ea6; }
.filter-btn:focus-visible, .syllabus-card:focus-visible, .syllabus-actions > *:focus-visible { outline: 2px solid #1a73e8; outline-offset: 2px; }
.chip-count { font-size: 0.75rem; color: #5f6368; font-variant-numeric: tabular-nums; }

.syllabus-filter-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 0.75rem; font-size: 0.85rem; color: #5f6368; font-variant-numeric: tabular-nums; min-height: 28px; }
.syllabus-clear { border: 0; background: none; color: #1a73e8; font: inherit; font-weight: 600; cursor: pointer; }

.syllabus-card { display: flex; flex-direction: column; background: #fff; border-radius: 12px; padding: 1.25rem; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1); cursor: pointer; transition: transform 0.15s ease, box-shadow 0.15s ease; }
.syllabus-card:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(0, 0, 0, 0.14); }
.syllabus-card.calendar-match { border: 2px solid #667eea; }
.syllabus-card-top { display: flex; justify-content: space-between; gap: 8px; margin-bottom: 0.5rem; font-size: 0.75rem; }
.syllabus-semester { padding: 2px 10px; border-radius: 999px; background: #e8f0fe; color: #174ea6; font-weight: 600; }
.syllabus-crn { color: #5f6368; font-variant-numeric: tabular-nums; }
.syllabus-card h3 { font-size: 1.1rem; font-weight: 600; color: #202124; margin: 0 0 0.35rem; overflow-wrap: anywhere; }
.syllabus-professor { color: #5f6368; margin: 0 0 0.75rem; font-size: 0.9rem; }
.syllabus-professor a { color: #1a73e8; text-decoration: none; }
.syllabus-professor a:hover { text-decoration: underline; }

.breakdown-bar { display: flex; height: 8px; border-radius: 999px; overflow: hidden; gap: 2px; }
.breakdown-legend { margin: 6px 0 0; font-size: 0.75rem; color: #5f6368; }

.syllabus-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: auto; padding-top: 1rem; }
.syllabus-actions > * { flex: 1 1 auto; padding: 8px 10px; border: 0; border-radius: 8px; background: #f1f3f4; color: #202124; font: inherit; font-size: 0.85rem; font-weight: 500; text-align: center; text-decoration: none; cursor: pointer; white-space: nowrap; }
.syllabus-actions > [data-action="view"] { background: #1a73e8; color: #fff; }
.syllabus-actions > *:hover { filter: brightness(0.95); }

/* Skeleton placeholders while the first load is in flight */
.syllabus-skeleton { height: 190px; border-radius: 12px; background: linear-gradient(90deg, #f1f3f4 25%, #e8eaed 37%, #f1f3f4 63%); background-size: 400% 100%; animation: syllabus-shimmer 1.4s ease infinite; }
@keyframes syllabus-shimmer { 0% { background-position: 100% 50%; } 100% { background-position: 0 50%; } }

@media (max-width: 768px) {
    #upload-form > div { grid-template-columns: 1fr !important; }
    #syllabus-grid { grid-template-columns: 1fr !important; }
}
@media (max-width: 600px) { .syllabus-search-row { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) {
    .syllabus-card { transition: none; }
    .syllabus-card:hover { transform: none; }
    .syllabus-skeleton { animation: none; }
}

html.dark-theme #syllabus-search, html.dark-theme #syllabus-sort, html.dark-theme .filter-btn { background: #2d2d2d; border-color: #3c4043; color: #e8eaed; }
html.dark-theme .filter-btn.active { background: #1f2a3d; border-color: #8ab4f8; color: #aecbfa; }
html.dark-theme .syllabus-skeleton { background: linear-gradient(90deg, #222 25%, #2d2d2d 37%, #222 63%); background-size: 400% 100%; }
/* theme-styles.css keeps syllabus cards white in dark mode, so card internals stay light-themed */
html.dark-theme .syllabus-filters { background: #1e1e1e; box-shadow: none; border: 1px solid #333; }
html.dark-theme .syllabus-clear { color: #8ab4f8 !important; background: none !important; }
html.dark-theme .syllabus-card .syllabus-actions > [data-action="view"] { color: #fff !important; }