*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue:    #002e5d;
  --blue-lt: #0062b8;
  --accent:  #c8102e;
  --bg:      #f5f6f8;
  --card:    #ffffff;
  --border:  #dde1e7;
  --text:    #1a1a2e;
  --muted:   #6b7280;
  --green:   #16a34a;
  --radius:  8px;
}

[data-theme="dark"] {
  --bg:     #111827;
  --card:   #1f2937;
  --border: #374151;
  --text:   #f9fafb;
  --muted:  #9ca3af;
  --green:  #4ade80;
}
[data-theme="dark"] body { color-scheme: dark; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
}

/* ── Header ─────────────────────────────────── */
header {
  background: var(--blue);
  color: #fff;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}
header h1 { font-size: 1.4rem; font-weight: 700; letter-spacing: -.3px; }
.home-link { color: inherit; text-decoration: none; }
.home-link:hover { opacity: .85; }
header .term-label {
  font-size: .8rem;
  background: rgba(255,255,255,.15);
  border-radius: 20px;
  padding: 2px 10px;
}
.theme-toggle {
  margin-left: auto;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 20px;
  color: #fff;
  font-size: .8rem;
  padding: 4px 12px;
  cursor: pointer;
  transition: background .15s;
}
.theme-toggle:hover { background: rgba(255,255,255,.25); }

/* ── Layout ──────────────────────────────────── */
main {
  max-width: 1260px;
  margin: 24px auto;
  padding: 0 16px;
  display: grid;
  grid-template-columns: 340px 1fr 220px;
  gap: 20px;
}
@media (max-width: 960px) {
  main { grid-template-columns: 300px 1fr; }
  .info-panel { display: none; }
}
@media (max-width: 680px) {
  main { grid-template-columns: 1fr; }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  min-width: 0;
}

/* ── Controls panel ──────────────────────────── */
.controls { display: flex; flex-direction: column; gap: 20px; }

.field-group label {
  display: block;
  font-weight: 600;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--muted);
  margin-bottom: 8px;
}

/* Building list */
.building-actions {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
}
.building-actions button {
  font-size: .78rem;
  padding: 3px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  cursor: pointer;
}
.building-actions button:hover { background: var(--border); }

.building-search {
  width: 100%;
  padding: 6px 10px;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  font-size: .88rem;
  margin-bottom: 6px;
  background: var(--card);
}
.building-search:focus {
  outline: none;
  border-color: var(--blue-lt);
}

.building-list {
  max-height: 420px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
@media (max-width: 680px) {
  .building-list { max-height: 240px; }
}
.building-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 6px;
  border-radius: 4px;
  cursor: pointer;
  user-select: none;
}
.building-item:hover { background: var(--bg); }
.building-item input { cursor: pointer; accent-color: var(--blue-lt); }
.building-item .b-name { flex: 1; font-size: .88rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.building-item .b-badge {
  font-size: .72rem;
  color: var(--muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1px 7px;
  white-space: nowrap;
}
.building-item .b-badge.cached { color: var(--green); border-color: var(--green); }

/* Day buttons */
.day-buttons { display: flex; gap: 6px; flex-wrap: wrap; }
.day-btn {
  padding: 6px 12px;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  background: var(--card);
  cursor: pointer;
  font-size: .85rem;
  font-weight: 500;
  transition: .15s;
}
.day-btn:hover { border-color: var(--blue-lt); color: var(--blue-lt); }
.day-btn.active {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}

/* Time range */
.time-range { display: flex; align-items: center; gap: 10px; }
.time-range select {
  padding: 7px 10px;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  background: var(--card);
  font-size: .88rem;
  cursor: pointer;
}
.time-range span { color: var(--muted); font-size: .85rem; }

/* Selected building indicator */
.selected-building-info {
  font-size: .82rem;
  color: var(--blue-lt);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 12px;
  text-align: center;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
[data-theme="dark"] .selected-building-info {
  background: rgba(255,255,255,.04);
}

/* Right Now row */
.right-now-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.right-now-btn {
  padding: 6px 12px;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  background: var(--card);
  cursor: pointer;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text);
  transition: .15s;
  white-space: nowrap;
}
.right-now-btn:hover { border-color: var(--blue-lt); color: var(--blue-lt); }
.right-now-btn.active {
  background: var(--blue-lt);
  border-color: var(--blue-lt);
  color: #fff;
}
.hour-selector {
  display: flex;
  gap: 5px;
}
.hour-btn {
  padding: 5px 10px;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  background: var(--card);
  cursor: pointer;
  font-size: .82rem;
  font-weight: 500;
  color: var(--muted);
  transition: .15s;
}
.hour-btn:hover { border-color: var(--blue-lt); color: var(--blue-lt); }
.hour-btn.active {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}
.time-range select:disabled {
  opacity: .45;
  cursor: not-allowed;
}

/* Search button */
#btn-search {
  width: 100%;
  padding: 10px;
  background: var(--blue);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: .15s;
}
#btn-search:hover { background: var(--blue-lt); }
#btn-search:disabled { background: var(--muted); cursor: not-allowed; }

/* ── Results panel ───────────────────────────── */
.results { display: flex; flex-direction: column; gap: 16px; min-width: 0; }

.results-header {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.results-header h2 { font-size: 1rem; font-weight: 600; }
.results-count {
  font-size: .82rem;
  background: var(--blue);
  color: #fff;
  border-radius: 20px;
  padding: 2px 10px;
}

/* Progress bars */
.progress-wrap { margin-bottom: 4px; }
.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: .78rem;
  color: var(--muted);
  margin-bottom: 3px;
}
.progress-bar-track {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: var(--blue-lt);
  border-radius: 3px;
  transition: width .3s;
}

/* Results table */
.table-scroll {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
#results-table {
  width: 100%;
  min-width: 420px;
  border-collapse: collapse;
  font-size: .88rem;
}
@media (max-width: 768px) {
  /* Hide Description and Capacity on mobile — keep Building, Room, Available */
  #results-table th:nth-child(3),
  #results-table td:nth-child(3),
  #results-table th:nth-child(4),
  #results-table td:nth-child(4) { display: none; }
  #results-table th, #results-table td { padding: 7px 8px; }
  #results-table { min-width: 0; font-size: .82rem; }
}
#results-table th {
  text-align: left;
  padding: 8px 12px;
  background: var(--bg);
  border-bottom: 2px solid var(--border);
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .4px;
  color: var(--muted);
}
#results-table td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
}
#results-table tr:last-child td { border-bottom: none; }
#results-table tr:hover td { background: var(--bg); }

.room-link {
  color: var(--blue-lt);
  text-decoration: none;
  font-weight: 600;
}
.room-link:hover { text-decoration: underline; }

.cap-badge {
  display: inline-block;
  font-size: .75rem;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
}

.avail-full {
  display: inline-block;
  font-size: .8rem;
  color: var(--green);
  font-weight: 500;
}
.avail-part {
  display: inline-block;
  font-size: .8rem;
  color: var(--blue-lt);
}

.partial-row td { color: var(--muted); }
.partial-row .room-link { color: var(--muted); }
.partial-row:hover td { color: var(--text); }
.partial-row:hover .room-link { color: var(--blue-lt); }

tr.section-divider td {
  background: #f0f4ff;
  color: var(--blue-lt);
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .4px;
  padding: 5px 12px;
  border-top: 2px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* Utility */
.placeholder-msg {
  color: var(--muted);
  font-size: .9rem;
  padding: 32px 0;
  text-align: center;
}
.error-msg {
  color: var(--accent);
  font-size: .88rem;
  padding: 10px 14px;
  background: #fff0f0;
  border: 1px solid #fcc;
  border-radius: var(--radius);
}
.spinner {
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--blue-lt);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Info panel ──────────────────────────────── */
.info-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-self: start;
}
.info-panel h2 {
  font-size: .95rem;
  font-weight: 700;
  color: var(--text);
}
.info-panel h3 {
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .4px;
  color: var(--muted);
  margin-bottom: 4px;
}
.info-panel p, .info-panel ol {
  font-size: .82rem;
  color: var(--muted);
  line-height: 1.6;
}
.info-panel ol {
  padding-left: 18px;
}
.info-panel ol li {
  margin-bottom: 4px;
}
.info-panel strong {
  color: var(--text);
  font-weight: 600;
}
.info-badge-example {
  display: inline-block;
  font-size: .72rem;
  color: var(--green);
  border: 1px solid var(--green);
  border-radius: 10px;
  padding: 1px 7px;
  white-space: nowrap;
  vertical-align: middle;
}