/* ─────────────────────────────────────────
   Campus Virtual Tour — Stylesheet
   Aesthetic: Refined Academic / Editorial
   ───────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@600;700&family=DM+Sans:wght@300;400;500&display=swap');

/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --clr-bg:       #0d1117;
  --clr-surface:  #161b24;
  --clr-border:   rgba(255,255,255,0.08);
  --clr-accent:   #c8a96e;          /* warm gold */
  --clr-accent2:  #5b9bd5;          /* sky blue  */
  --clr-text:     #e8e6e1;
  --clr-muted:    #7a8090;
  --header-h:     64px;
  --radius:       10px;
  --shadow:       0 8px 32px rgba(0,0,0,0.5);
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;
}

html, body {
  height: 100%;
  font-family: var(--font-body);
  background: var(--clr-bg);
  color: var(--clr-text);
  overflow: hidden;
}

/* ── Header ── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 100;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--clr-border);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.logo-img {
  height: 38px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
}

.logo-text strong {
  display: block;
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--clr-accent);
  letter-spacing: 0.02em;
  line-height: 1.1;
}
.logo-text small {
  font-size: 11px;
  color: var(--clr-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ── Quick-nav ── */
.quick-nav {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.quick-nav button {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--clr-border);
  color: var(--clr-text);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 5px 13px;
  border-radius: 20px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  white-space: nowrap;
}
.quick-nav button:hover,
.quick-nav button.active {
  background: var(--clr-accent);
  border-color: var(--clr-accent);
  color: #111;
}

/* ── Viewer ── */
#viewer {
  position: fixed;
  inset: var(--header-h) 0 0 0;
}

/* ── Location badge ── */
.location-badge {
  position: fixed;
  top: calc(var(--header-h) + 12px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 90;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(13, 17, 23, 0.80);
  backdrop-filter: blur(12px);
  border: 1px solid var(--clr-border);
  border-radius: 30px;
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--clr-text);
  pointer-events: none;
  transition: opacity 0.4s;
}
.badge-icon { font-size: 15px; }

/* ── Loading overlay ── */
.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--clr-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  transition: opacity 0.5s;
}
.loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 44px;
  height: 44px;
  border: 3px solid rgba(200,169,110,0.15);
  border-top-color: var(--clr-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-overlay p {
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--clr-muted);
  letter-spacing: 0.04em;
}

/* ── PSV custom theming ── */
.psv-navbar { background: rgba(13,17,23,0.80) !important; backdrop-filter: blur(10px); }
.psv-button { color: var(--clr-text) !important; }
.psv-button:hover { color: var(--clr-accent) !important; }

/* Marker tooltip */
.psv-marker-tooltip {
  background: rgba(13,17,23,0.92) !important;
  border: 1px solid var(--clr-border) !important;
  border-radius: var(--radius) !important;
  font-family: var(--font-body) !important;
  color: var(--clr-text) !important;
}

/* ── Gallery panel ── */
.psv-gallery-item-title {
  font-family: var(--font-body) !important;
  font-size: 12px !important;
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .quick-nav { display: none; }
  .logo-text strong { font-size: 14px; }
  .floor-selector { bottom: 200px !important; }
}

/* ── Floor selector ── */
.floor-selector {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  left: 12px;
  z-index: 95;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--clr-border);
  border-radius: 10px;
  padding: 8px 6px;
}

.floor-selector-label {
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-muted);
  margin-bottom: 2px;
}

.floor-btn {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--clr-border);
  border-radius: 8px;
  background: rgba(255,255,255,0.05);
  color: var(--clr-text);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s, transform 0.15s;
}

.floor-btn:hover {
  background: rgba(200, 169, 110, 0.2);
  border-color: var(--clr-accent);
  transform: scale(1.08);
}

.floor-btn.active {
  background: var(--clr-accent);
  border-color: var(--clr-accent);
  color: #111;
}

/* ── PSV Map widget tweaks ── */
.psv-map {
  border: 1px solid var(--clr-border) !important;
  border-radius: 10px !important;
  overflow: hidden;
}

/* ── PlanPlugin (outdoor OpenStreetMap) ── */
.psv-plan {
  border: 1px solid var(--clr-border) !important;
  border-radius: 10px !important;
  overflow: hidden;
}
.psv-plan .leaflet-control-attribution {
  font-size: 8px;
  background: rgba(13,17,23,0.7) !important;
  color: var(--clr-muted) !important;
}
.psv-plan .leaflet-control-attribution a { color: var(--clr-accent) !important; }

/* ── Sidebar toggle (hamburger) ── */
.sidebar-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--clr-border);
  border-radius: 8px;
  background: rgba(255,255,255,0.05);
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.2s;
}
.sidebar-toggle:hover {
  background: rgba(200,169,110,0.15);
}
.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.2s;
  position: relative;
}
.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 18px;
}
.hamburger::before { top: -6px; }
.hamburger::after  { top: 6px;  }

/* When sidebar is open, animate to X */
.sidebar-open .hamburger { background: transparent; }
.sidebar-open .hamburger::before { top: 0; transform: rotate(45deg); background: var(--clr-accent); }
.sidebar-open .hamburger::after  { top: 0; transform: rotate(-45deg); background: var(--clr-accent); }

/* ── Sidebar ── */
.sidebar {
  position: fixed;
  top: var(--header-h);
  right: 0;
  bottom: 0;
  width: 300px;
  z-index: 150;
  background: rgba(13, 17, 23, 0.95);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-left: 1px solid var(--clr-border);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.sidebar.open {
  transform: translateX(0);
}

.sidebar-overlay {
  position: fixed;
  inset: 0;
  z-index: 140;
  background: rgba(0,0,0,0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.sidebar-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px 12px;
  border-bottom: 1px solid var(--clr-border);
}
.sidebar-title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--clr-accent);
  letter-spacing: 0.02em;
}
.sidebar-close {
  background: none;
  border: none;
  color: var(--clr-muted);
  font-size: 18px;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
  transition: color 0.2s;
}
.sidebar-close:hover { color: var(--clr-text); }

/* ── Sidebar nav / accordion ── */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}
.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }

/* Floor group */
.floor-group {
  border-bottom: 1px solid var(--clr-border);
}

/* Floor header (accordion trigger) */
.floor-header {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 12px 18px;
  background: none;
  border: none;
  color: var(--clr-text);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.03em;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s;
}
.floor-header:hover {
  background: rgba(255,255,255,0.04);
}
.floor-header .floor-icon {
  font-size: 16px;
  flex-shrink: 0;
  width: 22px;
  text-align: center;
}
.floor-header .floor-name {
  flex: 1;
}
.floor-header .floor-count {
  font-size: 10px;
  color: var(--clr-muted);
  background: rgba(255,255,255,0.06);
  padding: 2px 7px;
  border-radius: 10px;
  font-weight: 500;
}
.floor-header .chevron {
  font-size: 10px;
  color: var(--clr-muted);
  transition: transform 0.25s;
}
.floor-group.expanded .floor-header .chevron {
  transform: rotate(90deg);
}
.floor-group.expanded .floor-header {
  color: var(--clr-accent);
}

/* Place list (accordion body) */
.floor-places {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.floor-group.expanded .floor-places {
  max-height: 500px;
}

.place-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 18px 9px 50px;
  background: none;
  border: none;
  color: var(--clr-muted);
  font-family: var(--font-body);
  font-size: 12.5px;
  font-weight: 400;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s, color 0.15s;
}
.place-btn:hover {
  background: rgba(200, 169, 110, 0.08);
  color: var(--clr-text);
}
.place-btn.active {
  color: var(--clr-accent);
  background: rgba(200, 169, 110, 0.12);
  font-weight: 600;
}
.place-btn .place-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-muted);
  flex-shrink: 0;
  transition: background 0.2s, transform 0.2s;
}
.place-btn.active .place-dot {
  background: var(--clr-accent);
  transform: scale(1.4);
}
.place-btn .place-caption {
  font-size: 10px;
  color: var(--clr-muted);
  margin-top: 1px;
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: opacity 0.2s, max-height 0.2s;
}
.place-btn.active .place-caption {
  opacity: 1;
  max-height: 30px;
}

@media (max-width: 480px) {
  .sidebar { width: 260px; }
}