/* ==========================================================================
   MAIN STYLES - SA BÀN 3D VÙNG NÚI PHÍA BẮC "GIEO MẦM VÙNG CAO"
   Immersive HUD, Refined 3D Markers, Sleek Preview Card & Mobile Bottom Bar
   ========================================================================== */

/* 3D Canvas Container - Full-bleed across entire device screen */
#saban-viewport {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100dvh;
  z-index: 1;
  touch-action: none;
  background: radial-gradient(
    circle at 50% 35% var(--in-oklab),
    #144030 0%,
    #0b2219 70%,
    #071711 100%
  );
}

#saban-canvas {
  width: 100%;
  height: 100%;
  display: block;
  outline: none;
  touch-action: none;
}

/* CSS2DRenderer Layer for 3D HTML Pins */
#saban-labels-layer {
  position: fixed;
  inset: 0;
  width: 100%;
  max-width: 100vw;
  overflow: hidden;
  pointer-events: none;
  z-index: 5;
}

/* Atmosphere Vignette (Subtle so full-bleed terrain stays bright and clear) */
.vignette-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  background:
    radial-gradient(circle at center, transparent 68%, rgba(7, 23, 17, 0.42) 100%),
    linear-gradient(to bottom, rgba(7, 23, 17, 0.35) 0%, transparent 14%, transparent 86%, rgba(7, 23, 17, 0.48) 100%);
}

/* Mobile Sheet Backdrop */
.mobile-sheet-backdrop {
  position: fixed;
  inset: 0;
  z-index: 24;
  background: rgba(4, 10, 8, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-sheet-backdrop.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* Loading Screen */
.loading-screen {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--bg-deep);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  transition: opacity 0.8s var(--ease-out-expo), visibility 0.8s;
}

.loading-screen.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-emblem {
  width: 92px;
  height: 92px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  position: relative;
  background: transparent;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

.loading-logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 50%;
}

.loading-emblem::after {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1.5px dashed rgba(192, 136, 52, 0.55);
  animation: spinSlow 14s linear infinite;
}

.loading-title {
  font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.25rem);
  color: var(--text-primary);
  letter-spacing: -0.01em;
  text-align: center;
}

.loading-subtitle {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}

.loading-bar-track {
  width: min(260px, 75vw);
  height: 3px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  overflow: hidden;
}

.loading-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(to right var(--in-oklab), var(--accent-emerald), var(--accent-terracotta));
  transition: width 0.3s ease;
}

/* ==========================================================================
   IMMERSIVE HUD LAYOUT
   ========================================================================== */
.hud-layer {
  position: fixed;
  inset: 0;
  width: 100%;
  max-width: 100vw;
  overflow: hidden;
  z-index: 10;
  pointer-events: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto 1fr auto;
  padding: clamp(0.75rem, 1.5vw, 1.5rem);
}

.hud-interactive {
  pointer-events: auto;
}

/* Top Bar */
.hud-header {
  width: 100%;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.brand-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  min-width: 0;
  padding: 0.45rem 1rem 0.45rem 0.55rem;
  background: var(--bg-panel);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  box-shadow: var(--shadow-elevated);
}

.brand-identity {
  display: flex;
  align-items: center;
  gap: 0.68rem;
  min-width: 0;
  flex: 1;
}

.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: transparent;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.35));
}

.brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--accent-amber);
  letter-spacing: 0.06em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-name {
  font-size: clamp(0.95rem, 0.88rem + 0.35vw, 1.22rem);
  color: var(--text-primary);
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Mobile Touch Mode Toggle Pill (Hidden on Desktop, Shown on Mobile) */
.touch-mode-pill {
  display: none;
  align-items: center;
  gap: 0.3rem;
  padding: 0.36rem 0.62rem;
  border-radius: 999px;
  background: rgba(192, 136, 52, 0.16);
  border: 1px solid rgba(192, 136, 52, 0.45);
  color: var(--accent-gold);
  font-size: 0.6875rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.touch-mode-pill.is-rotate-mode {
  background: rgba(92, 128, 80, 0.22);
  border-color: var(--accent-Jade);
  color: #dff0dc;
}

.touch-mode-icon {
  font-size: 0.78rem;
  line-height: 1;
}

/* Impact Global Counters in Header */
.hud-stats-pill {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  padding: 0.52rem 1.15rem;
  background: var(--bg-panel);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  box-shadow: var(--shadow-elevated);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent-gold);
}

.stat-label {
  font-size: 0.6875rem;
  color: var(--text-secondary);
}

.stat-divider {
  width: 1px;
  height: 24px;
  background: var(--border-subtle);
}

/* Header Right Controls (Desktop) */
.hud-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.hud-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.58rem 0.9rem;
  border-radius: 11px;
  background: var(--bg-panel);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.78rem;
  font-weight: 500;
  transition: all 0.22s var(--ease-out-expo);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

.hud-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-highlight);
  transform: translateY(-1px);
}

.hud-btn.is-active {
  background: rgba(245, 158, 11, 0.16);
  border-color: var(--accent-amber);
  color: var(--accent-gold);
}

/* Mobile Filter Strip (Hidden on Desktop, Shown on Mobile) */
.mobile-filter-strip {
  display: none;
  width: 100%;
  overflow-x: auto;
  gap: 0.4rem;
  padding-block: 0.2rem;
  scrollbar-width: none;
}

.mobile-filter-strip::-webkit-scrollbar {
  display: none;
}

/* ==========================================================================
   MIDDLE WORKSPACE: LEFT EXPLORER DRAWER, ZOOM CONTROLS & RIGHT PREVIEW CARD
   ========================================================================== */
.hud-workspace {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-block: 0.75rem;
  pointer-events: none;
}

/* Left Panel: Region Filter & School Coordinates List */
.explorer-sidebar {
  width: min(316px, 88vw);
  max-height: calc(100dvh - 175px);
  display: flex;
  flex-direction: column;
  background: var(--bg-panel);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  box-shadow: var(--shadow-elevated);
  overflow: hidden;
  transition: transform 0.4s var(--ease-out-expo), opacity 0.3s ease;
}

.explorer-sidebar.is-collapsed {
  transform: translateX(calc(-100% - 2rem));
  opacity: 0;
  pointer-events: none;
}

.sheet-drag-handle {
  display: none;
}

.sidebar-mobile-close {
  display: none;
}

.sidebar-header {
  padding: 0.9rem 1rem 0.65rem;
  border-bottom: 1px solid var(--border-subtle);
}

.sidebar-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}

.sidebar-header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  font-family: var(--font-sans);
}

.sidebar-count {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--accent-Jade);
  background: rgba(16, 185, 129, 0.14);
  padding: 0.12rem 0.5rem;
  border-radius: 999px;
}

/* Filter Tabs */
.region-tabs {
  display: flex;
  gap: 0.3rem;
  overflow-x: auto;
  padding-bottom: 0.2rem;
  scrollbar-width: none;
}

.region-tabs::-webkit-scrollbar {
  display: none;
}

.region-tab {
  padding: 0.3rem 0.65rem;
  border-radius: 8px;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.06);
  white-space: nowrap;
  transition: all 0.2s ease;
}

.region-tab:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
}

.region-tab.is-active {
  color: var(--text-dark);
  background: var(--accent-amber);
  border-color: var(--accent-amber);
  font-weight: 600;
}

/* School Coordinates List */
.school-list {
  padding: 0.55rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.school-list-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 0.65rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid transparent;
  text-align: start;
  transition: all 0.22s var(--ease-out-expo);
  cursor: pointer;
}

.school-list-item:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateX(2px);
}

.school-list-item.is-selected {
  background: rgba(245, 158, 11, 0.14);
  border-color: rgba(245, 158, 11, 0.65);
}

.school-item-thumb {
  width: 42px;
  height: 42px;
  border-radius: 9px;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--border-subtle);
}

.school-item-info {
  flex: 1;
  min-width: 0;
}

.school-item-province {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent-amber);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.school-item-name {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.school-item-coords {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--text-muted);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-dot--completed {
  background: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
}

.status-dot--building {
  background: var(--accent-amber);
  box-shadow: 0 0 8px var(--accent-amber);
}

.status-dot--survey {
  background: var(--accent-sky);
  box-shadow: 0 0 8px var(--accent-sky);
}

/* Floating Zoom Controls (+ / -) */
.floating-map-controls {
  position: fixed;
  right: 1.5rem;
  bottom: 4.8rem;
  z-index: 12;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.map-ctrl-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--bg-panel);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 600;
  display: grid;
  place-items: center;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
  transition: all 0.2s ease;
}

.map-ctrl-btn:hover {
  border-color: var(--accent-amber);
  color: var(--accent-gold);
}

/* ==========================================================================
   RIGHT PANEL: REFINED SCHOOL QUICK PREVIEW CARD (TINH TẾ, VỪA VẶN)
   ========================================================================== */
.school-preview-card {
  width: min(334px, 90vw);
  margin-left: auto;
  background: var(--bg-panel);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid rgba(245, 158, 11, 0.38);
  border-radius: 18px;
  box-shadow: var(--shadow-elevated);
  overflow: hidden;
  transform: translateX(22px) scale(0.96);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    transform 0.38s var(--ease-out-expo),
    opacity 0.3s var(--ease-out-expo),
    visibility 0.3s;
}

.school-preview-card.is-visible {
  transform: translateX(0) scale(1);
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.preview-media {
  position: relative;
  height: 146px;
  overflow: hidden;
}

.preview-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.65s var(--ease-out-expo);
}

.school-preview-card:hover .preview-media img {
  transform: scale(1.04);
}

.preview-media-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(9, 19, 16, 0.94) 0%,
    rgba(9, 19, 16, 0.22) 55%,
    transparent 100%
  );
}

.preview-close-btn {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(9, 19, 16, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.75rem;
  display: grid;
  place-items: center;
  transition: all 0.2s ease;
}

.preview-close-btn:hover {
  background: var(--accent-terracotta);
  border-color: transparent;
}

.preview-status-badge {
  position: absolute;
  top: 0.6rem;
  left: 0.6rem;
  padding: 0.22rem 0.65rem;
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 600;
  background: rgba(9, 19, 16, 0.76);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.preview-gps-strip {
  position: absolute;
  bottom: 0.5rem;
  left: 0.95rem;
  right: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--accent-gold);
}

.preview-body {
  padding: 0.9rem 1rem 1.05rem;
}

.preview-stepper-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.preview-location-tag {
  font-size: 0.6875rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.preview-stepper-btns {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-shrink: 0;
}

.stepper-mini-btn {
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--accent-gold);
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.28);
  transition: all 0.18s ease;
}

.stepper-mini-btn:hover {
  background: var(--accent-amber);
  color: var(--text-dark);
}

.preview-title {
  font-size: 1.15rem;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.preview-summary {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.preview-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.4rem;
  padding: 0.55rem;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--border-subtle);
  border-radius: 11px;
  margin-bottom: 0.75rem;
}

.metric-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.metric-val {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.metric-lbl {
  font-size: 0.625rem;
  color: var(--text-muted);
}

.preview-progress-wrap {
  margin-bottom: 0.85rem;
}

.preview-progress-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.6875rem;
  margin-bottom: 0.3rem;
  color: var(--text-secondary);
}

.preview-progress-bar {
  height: 5px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.preview-progress-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(to right var(--in-oklab), var(--accent-emerald), var(--accent-amber));
  transition: width 0.5s var(--ease-out-expo);
}

.preview-actions {
  display: flex;
  gap: 0.5rem;
}

.btn-primary-detail {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.62rem 0.85rem;
  border-radius: 10px;
  background: linear-gradient(135deg var(--in-oklab), var(--accent-amber), var(--accent-terracotta));
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(234, 88, 12, 0.32);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary-detail:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 22px rgba(234, 88, 12, 0.45);
}

.btn-secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.62rem 0.75rem;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.75rem;
  transition: all 0.2s ease;
}

.btn-secondary-link:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--text-secondary);
}

/* ==========================================================================
   BOTTOM BAR: DESKTOP TELEMETRY & MOBILE BOTTOM ACTION BAR
   ========================================================================== */
.hud-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.telemetry-bar {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.48rem 0.9rem;
  background: var(--bg-panel);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-secondary);
}

.telemetry-item strong {
  color: var(--accent-gold);
  font-weight: 600;
}

.interaction-guide {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.48rem 0.95rem;
  background: var(--bg-panel);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  font-size: 0.6875rem;
  color: var(--text-secondary);
}

.guide-step {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.guide-key {
  padding: 0.12rem 0.4rem;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--text-primary);
}

/* Mobile Bottom Navigation Bar (Hidden on Desktop, Shown on <= 960px) */
.mobile-bottom-bar {
  display: none;
}

/* ==========================================================================
   3D CSS2D MARKERS (TINH GỌN, THANH LỊCH TRÊN SA BÀN & CHỐNG TRÀN VIỀN)
   ========================================================================== */
.saban-pin {
  pointer-events: auto;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  transform: translate(-50%, -100%);
  transition: opacity 0.2s ease, z-index 0s;
  user-select: none;
}

.saban-pin.is-offscreen {
  opacity: 0;
  pointer-events: none;
}

.saban-pin:hover,
.saban-pin.is-active {
  z-index: 40;
}

.saban-pin-card {
  display: flex;
  align-items: center;
  gap: 0.32rem;
  padding: 0.22rem 0.55rem 0.22rem 0.4rem;
  border-radius: 999px;
  background: rgba(9, 20, 17, 0.86);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.45);
  white-space: nowrap;
  transition: transform 0.22s var(--ease-out-expo), background-color 0.2s ease, border-color 0.2s ease;
}

/* Dịch thẻ nhãn vào trong lòng màn hình khi tọa độ 3D tiến sát mép trái/phải */
.saban-pin.pin-edge-left .saban-pin-card {
  transform: translateX(32%);
}

.saban-pin.pin-edge-right .saban-pin-card {
  transform: translateX(-32%);
}

.saban-pin:hover .saban-pin-card,
.saban-pin.is-active .saban-pin-card {
  background: rgba(15, 33, 28, 0.96);
  border-color: var(--accent-amber);
  color: var(--accent-gold);
  transform: scale(1.04) translateY(-2px);
  box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.28), 0 6px 18px rgba(0, 0, 0, 0.6);
}

.saban-pin.pin-edge-left.is-active .saban-pin-card {
  transform: translateX(32%) scale(1.04) translateY(-2px);
}

.saban-pin.pin-edge-right.is-active .saban-pin-card {
  transform: translateX(-32%) scale(1.04) translateY(-2px);
}

.saban-pin-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-emerald);
  flex-shrink: 0;
}

.saban-pin--building .saban-pin-dot {
  background: var(--accent-amber);
}

.saban-pin--survey .saban-pin-dot {
  background: var(--accent-sky);
}

.saban-pin-province {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--accent-amber);
}

.saban-pin-sep {
  font-size: 0.6875rem;
  opacity: 0.55;
}

.saban-pin-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.saban-pin-alt {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  opacity: 0.68;
  margin-left: 0.15rem;
}

.saban-pin-stem {
  width: 1.5px;
  height: 12px;
  background: linear-gradient(to bottom, rgba(245, 158, 11, 0.85), transparent);
}

/* Mountain Landmark Label in 3D space */
.saban-region-label {
  pointer-events: none;
  font-family: var(--font-display);
  font-size: 0.625rem;
  letter-spacing: 0.08em;
  color: rgba(253, 230, 138, 0.58);
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.9);
  white-space: nowrap;
  transition: opacity 0.25s ease;
}

/* Province Cartographic Name Label on 3D Terrain */
.saban-province-label {
  pointer-events: none;
  font-family: var(--font-sans);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: rgba(244, 247, 245, 0.34);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.92);
  white-space: nowrap;
  transition: opacity 0.25s ease;
}

.saban-region-label.is-edge-hidden,
.saban-province-label.is-edge-hidden {
  opacity: 0;
}

@keyframes spinSlow {
  to {
    transform: rotate(360deg);
  }
}

/* ==========================================================================
   MOBILE & TABLET RESPONSIVE DESIGN (<= 960px)
   Thiết kế chuẩn Mobile-First App với Bottom Action Bar & Bottom Sheet
   ========================================================================== */
@media (max-width: 960px) {
  .hud-layer {
    padding: 0.55rem 0.65rem calc(74px + env(safe-area-inset-bottom, 0px));
  }

  /* Ẩn các cụm nút Desktop để chuyển xuống Mobile Bottom Bar */
  .hud-stats-pill,
  .hud-actions,
  .telemetry-bar,
  .interaction-guide {
    display: none;
  }

  .hud-header {
    gap: 0.45rem;
  }

  .brand-block {
    width: 100%;
    max-width: 100%;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.42rem 0.65rem 0.42rem 0.48rem;
    border-radius: 14px;
  }

  .brand-logo {
    width: 38px;
    height: 38px;
  }

  .brand-badge {
    font-size: 0.5625rem;
    letter-spacing: 0.04em;
  }

  .brand-name {
    font-size: 0.95rem;
  }

  .touch-mode-pill {
    display: inline-flex;
  }

  /* Hiển thị thanh lọc vùng nhanh ngay dưới Header trên Mobile, không bao giờ tràn màn hình */
  .mobile-filter-strip {
    display: flex;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    gap: 0.32rem;
    padding-block: 0.1rem;
  }

  .mobile-filter-strip .region-tab {
    flex-shrink: 0;
    padding: 0.28rem 0.56rem;
    font-size: 0.6875rem;
  }

  /* Nút Zoom +/- đặt gọn bên phải giữa màn hình */
  .floating-map-controls {
    right: 0.65rem;
    top: 6.4rem;
    bottom: auto;
  }

  /* Chuyển Sidebar thành Ngăn kéo Bottom Sheet trượt từ đáy lên */
  .explorer-sidebar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: calc(64px + env(safe-area-inset-bottom, 0px));
    width: 100%;
    max-height: 62dvh;
    border-radius: 22px 22px 0 0;
    z-index: 28;
    background: rgba(11, 24, 20, 0.96);
    border-bottom: none;
    transform: translateY(115%);
    opacity: 1;
    pointer-events: none;
  }

  .explorer-sidebar.is-collapsed {
    transform: translateY(115%);
    opacity: 1;
    pointer-events: none;
  }

  .explorer-sidebar.is-mobile-open {
    transform: translateY(0);
    pointer-events: auto;
  }

  .sheet-drag-handle {
    display: flex;
    justify-content: center;
    padding-top: 0.55rem;
    cursor: pointer;
  }

  .sheet-drag-pill {
    width: 38px;
    height: 4px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.25);
  }

  .sidebar-mobile-close {
    display: inline-grid;
    place-items: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    font-size: 0.75rem;
    color: var(--text-secondary);
  }

  /* Thẻ Preview Điểm Trường trên Mobile: Gọn gàng ngay trên Bottom Bar, không che khuất núi 3D */
  .school-preview-card {
    position: fixed;
    left: 0.65rem;
    right: 0.65rem;
    bottom: calc(70px + env(safe-area-inset-bottom, 0px));
    width: auto;
    z-index: 26;
    border-radius: 18px;
    transform: translateY(24px);
  }

  .school-preview-card.is-visible {
    transform: translateY(0);
  }

  .preview-media {
    height: 108px;
  }

  .preview-body {
    padding: 0.7rem 0.85rem 0.8rem;
  }

  .preview-title {
    font-size: 1rem;
    margin-bottom: 0.22rem;
  }

  .preview-summary {
    -webkit-line-clamp: 2;
    font-size: 0.75rem;
    margin-bottom: 0.5rem;
  }

  .preview-metrics {
    padding: 0.4rem;
    margin-bottom: 0.5rem;
  }

  .preview-progress-wrap {
    margin-bottom: 0.6rem;
  }

  /* Thanh điều hướng đáy đầy đủ chức năng trên Mobile */
  .mobile-bottom-bar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 35;
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    align-items: center;
    padding: 0.36rem 0.3rem calc(0.36rem + env(safe-area-inset-bottom, 0px));
    background: rgba(9, 19, 16, 0.94);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-subtle);
    box-shadow: 0 -8px 28px rgba(0, 0, 0, 0.55);
  }

  .mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.18rem;
    padding: 0.32rem 0.1rem;
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 0.625rem;
    font-weight: 500;
    white-space: nowrap;
    transition: all 0.18s ease;
  }

  .mobile-nav-item:active,
  .mobile-nav-item.is-active {
    color: var(--accent-gold);
    background: rgba(245, 158, 11, 0.14);
  }

  .mobile-nav-item--highlight {
    color: var(--accent-Jade);
  }

  /* Thu gọn Nhãn 3D trên màn hình điện thoại để không đè lên nhau hoặc tràn mép */
  .saban-pin:not(.is-active) .saban-pin-province,
  .saban-pin:not(.is-active) .saban-pin-sep,
  .saban-pin:not(.is-active) .saban-pin-alt {
    display: none;
  }

  .saban-pin.is-active .saban-pin-alt {
    display: none;
  }

  .saban-pin-card {
    padding: 0.16rem 0.42rem;
    max-width: 46vw;
  }

  .saban-pin-label {
    font-size: 0.65rem;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .saban-region-label {
    font-size: 0.5625rem;
    letter-spacing: 0.05em;
    opacity: 0.65;
  }

  .saban-province-label {
    font-size: 0.5625rem;
    letter-spacing: 0.1em;
  }
}