:root {
  --bg: #0f1722;
  --panel: #16202e;
  --panel-2: #1c2838;
  --line: #2a3850;
  --text: #e8eef6;
  --muted: #93a4ba;

  --avail: #2e7d32;
  --avail-bg: #1b3a23;
  --avail-bg-hover: #245030;
  --avail-border: #3fae54;

  --booked: #c62828;
  --booked-bg: #2b2230;
  --booked-border: #7a5560;
  --booked-text: #c9a9b0;

  --expired-bg: #3a2c16;
  --expired-border: #b9842f;
  --expired-text: #e6c489;

  --accent: #4f9dff;
  --radius: 14px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, #1d3050 0%, transparent 60%),
    radial-gradient(900px 500px at -10% 10%, #16323a 0%, transparent 55%),
    var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.site-header {
  padding: 28px 20px 10px;
  max-width: 1000px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.brand-mark {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, #6fb1ff, #46e0a0);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-sub {
  font-size: 1rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.tagline {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.98rem;
}

/* Branch tabs — one per location, each with its own seat map. */
.branch-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
}

.branch-tab {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 16px;
}

.branch-tab:hover { color: var(--text); background: var(--panel-2); }

.branch-tab.is-current {
  color: #0f1722;
  background: var(--accent);
  border-color: var(--accent);
}

/* Page / toolbar */
.page {
  max-width: 1000px;
  margin: 0 auto;
  padding: 8px 20px 40px;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  margin: 16px 0 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.legend {
  display: flex;
  gap: 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--muted);
}

.swatch {
  width: 16px;
  height: 16px;
  border-radius: 5px;
  display: inline-block;
  border: 1px solid transparent;
}

.swatch-available {
  background: var(--avail-bg);
  border-color: var(--avail-border);
}

.swatch-booked {
  background: var(--booked-bg);
  border-color: var(--booked-border);
}

.swatch-expired {
  background: var(--expired-bg);
  border-color: var(--expired-border);
}

.status-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.85rem;
}

.availability-count {
  color: var(--text);
  font-weight: 600;
}

.refresh-note {
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.refresh-note::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #46e0a0;
  box-shadow: 0 0 0 0 rgba(70, 224, 160, 0.6);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(70, 224, 160, 0.5); }
  70%  { box-shadow: 0 0 0 7px rgba(70, 224, 160, 0); }
  100% { box-shadow: 0 0 0 0 rgba(70, 224, 160, 0); }
}

/* Seat map */
.seatmap {
  display: grid;
  gap: 20px;
}

.room {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.room-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
}

.room-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
}

.room-meta {
  font-size: 0.82rem;
  color: var(--muted);
  white-space: nowrap;
}

.seat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
  gap: 10px;
}

/* Physical floor plan — seats positioned to match the printed seating chart.
   Wide plans (the 50-desk hall) scroll sideways inside .room-scroll rather
   than shrinking the seats past legibility; the grid's min-width is set
   inline from its column count, so narrow rooms are unaffected. */
.room-scroll { overflow-x: auto; }

.floor-grid {
  display: grid;
  gap: 10px;
}

.floor-door {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Seat tile */
.seat {
  font: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  color: var(--text);
  aspect-ratio: 1 / 1;
  min-height: 56px;
  border-radius: 12px;
  border: 1.5px solid var(--line);
  background: var(--panel-2);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: default;
  transition: transform 0.08s ease, background 0.15s ease,
              border-color 0.15s ease, box-shadow 0.15s ease;
  user-select: none;
}

.seat.available {
  background: var(--avail-bg);
  border-color: var(--avail-border);
  color: #d8ffe2;
  cursor: default;
}

.seat.booked {
  background: var(--booked-bg);
  border-color: var(--booked-border);
  color: var(--booked-text);
  cursor: not-allowed;
  position: relative;
  opacity: 0.85;
}

.seat.expired {
  background: var(--expired-bg);
  border-color: var(--expired-border);
  color: var(--expired-text);
  position: relative;
}

.seat.booked::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 7px,
    rgba(198, 40, 40, 0.16) 7px,
    rgba(198, 40, 40, 0.16) 14px
  );
  pointer-events: none;
}

/* Toast / message */
.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%) translateY(20px);
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 12px 18px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  font-size: 0.92rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 50;
  max-width: min(90vw, 420px);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.error {
  border-color: #b3433f;
  background: #2c1f22;
}

.toast.success {
  border-color: #3fae54;
  background: #18301f;
}

/* Footer */
.site-footer {
  max-width: 1000px;
  margin: 0 auto;
  padding: 18px 20px 36px;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
}

/* Responsive */
@media (max-width: 560px) {
  .brand-mark { font-size: 1.6rem; }
  .toolbar {
    flex-direction: column;
    align-items: flex-start;
  }
  .seat-grid {
    grid-template-columns: repeat(auto-fill, minmax(52px, 1fr));
    gap: 8px;
  }
  .seat { min-height: 50px; font-size: 0.88rem; }
}