:root {
  --bg-deep: #0b1520;
  --bg-panel: rgba(13, 25, 38, 0.92);
  --bg-card: rgba(20, 36, 54, 0.78);
  --bg-card-hover: rgba(28, 49, 72, 0.92);
  --border-subtle: rgba(212, 175, 106, 0.22);
  --border-strong: rgba(212, 175, 106, 0.55);
  --gold-primary: #d8b26e;
  --gold-bright: #f0d296;
  --teal-accent: #18a5a7;
  --text-main: #f5f2eb;
  --text-muted: #b6c2cf;
  --text-dim: #7f91a5;
  --shadow-elevated: 0 18px 42px rgba(3, 9, 16, 0.55);
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 8px;
}

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

html,
body {
  width: 100%;
  height: 100%;
  background: var(--bg-deep);
  color: var(--text-main);
  font-family: 'IBM Plex Sans Thai', -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

button,
input {
  font-family: inherit;
  color: inherit;
}

.app-shell {
  display: grid;
  grid-template-rows: auto 1fr;
  width: 100%;
  height: 100dvh;
  overflow: hidden;
}

/* Top Executive Bar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 18px;
  background: linear-gradient(90deg, #09131e 0%, #102437 52%, #0c1b2a 100%);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 20;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.ku-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(24, 165, 167, 0.25), rgba(216, 178, 110, 0.28));
  border: 1px solid var(--border-strong);
  flex-shrink: 0;
}

.ku-badge-top {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--gold-bright);
}

.ku-badge-sub {
  font-size: 0.64rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.brand-copy {
  min-width: 0;
}

.brand-Overline {
  font-size: 0.68rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--gold-primary);
  font-weight: 600;
}

.brand-title {
  font-family: 'Cormorant Garamond', 'IBM Plex Sans Thai', serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-sub {
  font-family: 'IBM Plex Sans Thai', sans-serif;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-left: 6px;
}

/* Primary Room Switcher Tabs */
.room-switcher {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(7, 15, 24, 0.72);
  padding: 5px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.room-tab {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s ease;
}

.room-tab:hover {
  background: rgba(255, 255, 255, 0.05);
}

.room-tab.is-active {
  background: linear-gradient(135deg, rgba(216, 178, 110, 0.24), rgba(24, 165, 167, 0.2));
  border-color: var(--gold-primary);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.32);
}

.room-tab-icon {
  font-size: 1.2rem;
}

.room-tab-text {
  display: flex;
  flex-direction: column;
}

.room-tab-text strong {
  font-size: 0.84rem;
  color: var(--text-main);
  line-height: 1.2;
}

.room-tab-text small {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* Topbar Action Buttons */
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 13px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: rgba(22, 39, 58, 0.85);
  color: var(--text-main);
  font-size: 0.8rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.18s ease;
  white-space: nowrap;
}

.action-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--gold-primary);
}

.action-btn-gold {
  background: linear-gradient(135deg, #d8b26e 0%, #b98b3c 100%);
  color: #09131e;
  border-color: #f0d296;
  font-weight: 600;
}

.action-btn-gold:hover {
  background: linear-gradient(135deg, #e7c584 0%, #c99a49 100%);
  color: #071019;
}

.action-btn-outline {
  border-color: rgba(24, 165, 167, 0.55);
  background: rgba(24, 165, 167, 0.14);
}

.action-btn-music.is-playing {
  background: linear-gradient(135deg, rgba(216, 178, 110, 0.24), rgba(24, 165, 167, 0.22));
  border-color: var(--gold-primary);
  color: var(--gold-bright);
}

.eq-bars {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  height: 12px;
  margin-left: 2px;
}

.eq-bars i {
  display: block;
  width: 2.5px;
  height: 4px;
  background: var(--gold-bright);
  border-radius: 2px;
}

.action-btn-music.is-playing .eq-bars i:nth-child(1) {
  animation: eqPulse 0.9s ease-in-out infinite;
}
.action-btn-music.is-playing .eq-bars i:nth-child(2) {
  animation: eqPulse 0.65s ease-in-out 0.2s infinite;
}
.action-btn-music.is-playing .eq-bars i:nth-child(3) {
  animation: eqPulse 0.8s ease-in-out 0.4s infinite;
}

.action-btn-music:not(.is-playing) .eq-bars {
  opacity: 0.35;
}

@keyframes eqPulse {
  0%, 100% { height: 3px; }
  50% { height: 12px; }
}

/* Main Stage Grid */
.main-stage {
  display: grid;
  grid-template-columns: 360px 1fr;
  width: 100%;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

/* Left Sidebar Panel */
.sidebar-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border-subtle);
  overflow-y: auto;
  min-height: 0;
}

.panel-section {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px;
}

.event-banner-card {
  background: linear-gradient(145deg, rgba(14, 41, 68, 0.92), rgba(19, 33, 50, 0.92));
  border-color: rgba(24, 165, 167, 0.4);
}

.event-poster-row {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 11px;
  align-items: center;
}

.event-poster-thumb {
  width: 76px;
  height: 92px;
  object-fit: cover;
  border-radius: 7px;
  border: 1px solid var(--border-strong);
  cursor: pointer;
}

.event-tag {
  display: inline-block;
  font-size: 0.66rem;
  font-weight: 600;
  color: var(--gold-bright);
  background: rgba(216, 178, 110, 0.16);
  padding: 2px 7px;
  border-radius: 999px;
  margin-bottom: 4px;
}

.event-heading {
  font-size: 0.88rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.25;
}

.event-desc {
  font-size: 0.73rem;
  color: var(--gold-primary);
  margin-top: 2px;
}

.event-date-loc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 6px;
  font-size: 0.7rem;
  color: var(--text-muted);
}

.section-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.section-title {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--gold-bright);
}

.section-hint {
  font-size: 0.68rem;
  color: var(--text-dim);
}

.room-size-pill {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.69rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(216, 178, 110, 0.16);
  color: var(--gold-bright);
  border: 1px solid var(--border-subtle);
}

.room-summary-text {
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.spec-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.spec-badge {
  font-size: 0.71rem;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.09);
  color: var(--text-main);
}

.text-link-btn {
  background: rgba(24, 165, 167, 0.16);
  border: 1px solid rgba(24, 165, 167, 0.45);
  color: #8bf0f2;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 0.7rem;
  cursor: pointer;
}

.text-link-btn[aria-pressed="true"] {
  background: rgba(216, 178, 110, 0.28);
  border-color: var(--gold-primary);
  color: var(--gold-bright);
}

/* Camera Hotspot Cards */
.camera-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}

.cam-card {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(11, 22, 34, 0.65);
  text-align: left;
  cursor: pointer;
  transition: all 0.16s ease;
}

.cam-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
}

.cam-card.is-active {
  background: linear-gradient(135deg, rgba(216, 178, 110, 0.22), rgba(24, 165, 167, 0.16));
  border-color: var(--gold-primary);
}

.cam-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.74rem;
  font-weight: 600;
  width: 26px;
  height: 26px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(216, 178, 110, 0.18);
  color: var(--gold-bright);
  flex-shrink: 0;
}

.cam-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.cam-info strong {
  font-size: 0.8rem;
  color: var(--text-main);
}

.cam-info small {
  font-size: 0.69rem;
  color: var(--text-muted);
}

/* Smart TV Slide Selector */
.tv-slide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.tv-chip {
  padding: 7px 9px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(10, 20, 31, 0.7);
  font-size: 0.73rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tv-chip:hover {
  border-color: var(--gold-primary);
}

.tv-chip.is-active {
  background: rgba(216, 178, 110, 0.24);
  border-color: var(--gold-primary);
  color: var(--gold-bright);
  font-weight: 600;
}

.panel-footer-cta {
  padding: 8px;
}

.compare-btn {
  width: 100%;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: linear-gradient(135deg, rgba(216, 178, 110, 0.18), rgba(24, 165, 167, 0.18));
  color: var(--gold-bright);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}

.compare-btn:hover {
  background: linear-gradient(135deg, rgba(216, 178, 110, 0.3), rgba(24, 165, 167, 0.28));
}

/* 3D Viewport Stage */
.viewport-stage {
  position: relative;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: radial-gradient(circle at 50% 35%, #1c2d42 0%, #0b1520 100%);
}

#sceneCanvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
  display: block;
  outline: none;
}

.viewport-hud-top {
  position: absolute;
  top: 14px;
  left: 16px;
  z-index: 8;
  pointer-events: none;
}

.hud-room-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(9, 19, 30, 0.82);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  box-shadow: var(--shadow-elevated);
}

.hud-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #35d49a;
  box-shadow: 0 0 8px #35d49a;
}

.hud-sep {
  color: var(--text-dim);
}

/* Bottom Interactive Controls Dock */
.interactive-dock {
  position: absolute;
  left: 50%;
  bottom: 36px;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: var(--radius-lg);
  background: rgba(9, 19, 30, 0.88);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-elevated);
  max-width: calc(100% - 24px);
  overflow-x: auto;
}

.dock-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 11px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(20, 36, 54, 0.72);
  cursor: pointer;
  text-align: left;
  flex-shrink: 0;
  transition: all 0.16s ease;
}

.dock-toggle:hover {
  border-color: var(--gold-primary);
  background: rgba(28, 49, 72, 0.92);
}

.dock-toggle.is-active {
  border-color: var(--gold-primary);
  background: rgba(216, 178, 110, 0.18);
}

.dock-icon {
  font-size: 1.1rem;
}

.dock-label {
  display: flex;
  flex-direction: column;
}

.dock-label strong {
  font-size: 0.75rem;
  color: var(--text-main);
  white-space: nowrap;
}

.dock-label small {
  font-size: 0.64rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* Hotspot Info Popover */
.hotspot-card {
  position: absolute;
  top: 62px;
  right: 18px;
  width: 300px;
  padding: 14px;
  border-radius: var(--radius-md);
  background: rgba(10, 21, 33, 0.94);
  backdrop-filter: blur(12px);
  border: 1px solid var(--gold-primary);
  box-shadow: var(--shadow-elevated);
  z-index: 12;
}

.hotspot-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.hotspot-card-head strong {
  font-size: 0.88rem;
  color: var(--gold-bright);
}

.hotspot-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.9rem;
}

#hotspotBody {
  font-size: 0.78rem;
  line-height: 1.48;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.hotspot-photo-btn {
  width: 100%;
  padding: 7px 10px;
  border-radius: 6px;
  border: 1px solid var(--border-strong);
  background: rgba(216, 178, 110, 0.18);
  color: var(--gold-bright);
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
}

.orbit-hint {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.7rem;
  color: var(--text-muted);
  background: rgba(9, 18, 28, 0.72);
  padding: 3px 12px;
  border-radius: 999px;
  pointer-events: none;
  white-space: nowrap;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(4, 10, 18, 0.82);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-backdrop[hidden] {
  display: none !important;
}

.modal-dialog {
  background: #0e1d2d;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-elevated);
  max-height: 90dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  width: 100%;
}

.modal-xl {
  max-width: 1140px;
}

.modal-lg {
  max-width: 900px;
}

.modal-md {
  max-width: 560px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(8, 17, 27, 0.85);
}

.modal-overline {
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--gold-primary);
  font-weight: 600;
}

.modal-header h2 {
  font-size: 1.08rem;
  color: var(--text-main);
}

.modal-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-close {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.05);
  cursor: pointer;
  font-size: 1rem;
}

/* Gallery Modal */
.modal-filter-bar {
  display: flex;
  gap: 8px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.filter-pill {
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.04);
  font-size: 0.78rem;
  cursor: pointer;
}

.filter-pill.is-active {
  background: var(--gold-primary);
  color: #09131e;
  font-weight: 600;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
  padding: 18px 20px;
  overflow-y: auto;
}

.gallery-item {
  background: rgba(18, 33, 50, 0.85);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.gallery-item img {
  width: 100%;
  height: 175px;
  object-fit: cover;
}

.gallery-item-body {
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.gallery-item-tag {
  font-size: 0.68rem;
  color: var(--gold-primary);
  font-weight: 600;
}

.gallery-item-title {
  font-size: 0.82rem;
  font-weight: 600;
}

.gallery-item-desc {
  font-size: 0.73rem;
  color: var(--text-muted);
  flex: 1;
}

.gallery-match-btn {
  margin-top: 6px;
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid var(--border-strong);
  background: rgba(216, 178, 110, 0.16);
  color: var(--gold-bright);
  font-size: 0.74rem;
  cursor: pointer;
}

/* Brochure & Agenda Modal */
.agenda-modal-body {
  padding: 20px;
  overflow-y: auto;
}

.brochure-overview-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 20px;
}

.brochure-poster-card img {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
}

.brochure-venue-box {
  margin-top: 12px;
  padding: 12px;
  border-radius: var(--radius-md);
  background: rgba(20, 36, 54, 0.8);
  border: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  line-height: 1.5;
}

.brochure-venue-box h4 {
  color: var(--gold-bright);
  margin-bottom: 4px;
}

.organizer-note {
  margin-top: 8px;
  color: var(--gold-primary);
  font-weight: 600;
}

.why-data-box {
  padding: 14px;
  border-radius: var(--radius-md);
  background: rgba(20, 36, 54, 0.75);
  border: 1px solid var(--border-subtle);
  margin-bottom: 16px;
}

.why-data-box h3 {
  font-size: 0.95rem;
  color: var(--gold-bright);
  margin-bottom: 6px;
}

.why-data-box p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.pillars-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.pillar-card {
  padding: 10px;
  border-radius: 8px;
  background: rgba(10, 21, 33, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.pillar-card strong {
  font-size: 0.78rem;
  color: #8bf0f2;
}

.pillar-card span {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.agenda-days-heading {
  font-size: 0.95rem;
  color: var(--gold-bright);
  margin-bottom: 10px;
}

.agenda-days-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.day-card {
  padding: 12px;
  border-radius: var(--radius-md);
  background: rgba(20, 36, 54, 0.82);
  border: 1px solid var(--border-subtle);
}

.day-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 6px;
  background: linear-gradient(135deg, #d8b26e, #b98b3c);
  color: #09131e;
  font-weight: 700;
  font-size: 0.75rem;
  margin-bottom: 10px;
}

.day-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.76rem;
  line-height: 1.45;
  color: var(--text-muted);
}

.day-list strong {
  color: var(--text-main);
}

/* Compare Modal */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  padding: 20px;
  overflow-y: auto;
}

.compare-col {
  background: rgba(20, 36, 54, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.compare-thumb {
  width: 100%;
  height: 190px;
  object-fit: cover;
  border-radius: 8px;
}

.compare-sub {
  font-size: 0.78rem;
  color: var(--gold-primary);
}

.compare-list {
  padding-left: 18px;
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--text-muted);
  flex: 1;
}

.full-width {
  width: 100%;
}

/* QR Code Modal */
.qr-modal-body {
  padding: 18px 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.qr-intro {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.5;
}

.qr-card-preview {
  background: #09131e;
  padding: 10px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
}

#qrCardCanvas {
  width: 280px;
  height: auto;
  display: block;
  border-radius: 8px;
}

.qr-url-row {
  display: flex;
  width: 100%;
  gap: 8px;
}

#qrUrlInput {
  flex: 1;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: rgba(9, 19, 30, 0.9);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
}

/* Responsive Breakpoints */
@media (max-width: 1120px) {
  .topbar {
    flex-wrap: wrap;
  }
  .main-stage {
    grid-template-columns: 310px 1fr;
  }
  .brochure-overview-grid,
  .agenda-days-grid,
  .compare-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  html,
  body {
    overflow: auto;
    height: auto;
  }
  .app-shell {
    display: flex;
    flex-direction: column;
    height: auto;
    min-height: 100dvh;
    overflow-x: hidden;
  }
  .topbar {
    padding: 10px 12px;
    gap: 10px;
  }
  .brand-title {
    font-size: 1.05rem;
    white-space: normal;
  }
  .room-switcher {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .room-tab {
    padding: 7px 8px;
  }
  .topbar-actions {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .main-stage {
    display: flex;
    flex-direction: column-reverse;
    height: auto;
  }
  .viewport-stage {
    height: 440px;
    flex-shrink: 0;
  }
  .sidebar-panel {
    width: 100%;
    border-right: none;
    border-top: 1px solid var(--border-subtle);
    overflow: visible;
  }
  .interactive-dock {
    bottom: 10px;
    padding: 5px 8px;
  }
  .orbit-hint {
    display: none;
  }
  .pillars-grid {
    grid-template-columns: 1fr;
  }
}