/* ==========================================================================
   THE HABITAT ALBUM - Kid-Friendly 3D AR & Mobile-Responsive Design System
   Student Project by Ali Bin Hassan (2 Dahlia, SK Taman Midah 1)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@500;600;700;800;900&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
  /* Habitat Color Palettes */
  --desert-primary: #D97706;
  --desert-accent: #B45309;
  --desert-bg: #FEF3C7;
  --desert-card: #FFFBEB;
  --desert-glow: rgba(217, 119, 6, 0.3);

  --jungle-primary: #059669;
  --jungle-accent: #047857;
  --jungle-bg: #D1FAE5;
  --jungle-card: #ECFDF5;
  --jungle-glow: rgba(5, 150, 105, 0.3);

  --polar-primary: #0284C7;
  --polar-accent: #0369A1;
  --polar-bg: #E0F2FE;
  --polar-card: #F0F9FF;
  --polar-glow: rgba(2, 132, 199, 0.3);

  --ocean-primary: #2563EB;
  --ocean-accent: #1D4ED8;
  --ocean-bg: #DBEAFE;
  --ocean-card: #EFF6FF;
  --ocean-glow: rgba(37, 99, 235, 0.3);

  --mountain-primary: #7C3AED;
  --mountain-accent: #6D28D9;
  --mountain-bg: #EDE9FE;
  --mountain-card: #F5F3FF;
  --mountain-glow: rgba(124, 58, 237, 0.3);

  /* Active Theme Variables */
  --theme-primary: var(--desert-primary);
  --theme-accent: var(--desert-accent);
  --theme-bg-tint: var(--desert-bg);
  --theme-card-bg: var(--desert-card);
  --theme-glow: var(--desert-glow);

  --lighting-filter: none;

  /* Neutral Surface Palette */
  --surface-0: #0F172A;
  --surface-50: #F8FAFC;
  --surface-100: #F1F5F9;
  --surface-200: #E2E8F0;
  --surface-300: #CBD5E1;
  --surface-700: #334155;
  --surface-800: #1E293B;
  --surface-900: #0F172A;

  --text-main: #1E293B;
  --text-muted: #64748B;
  --text-white: #FFFFFF;

  /* Typography */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Radii */
  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.12);
  --shadow-pop: 0 10px 25px var(--theme-glow);

  /* Transitions */
  --transition-fast: 0.18s ease;
  --transition-normal: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Biome Themes */
body.theme-desert { --theme-primary: var(--desert-primary); --theme-accent: var(--desert-accent); --theme-bg-tint: var(--desert-bg); --theme-card-bg: var(--desert-card); --theme-glow: var(--desert-glow); }
body.theme-jungle { --theme-primary: var(--jungle-primary); --theme-accent: var(--jungle-accent); --theme-bg-tint: var(--jungle-bg); --theme-card-bg: var(--jungle-card); --theme-glow: var(--jungle-glow); }
body.theme-polar { --theme-primary: var(--polar-primary); --theme-accent: var(--polar-accent); --theme-bg-tint: var(--polar-bg); --theme-card-bg: var(--polar-card); --theme-glow: var(--polar-glow); }
body.theme-ocean { --theme-primary: var(--ocean-primary); --theme-accent: var(--ocean-accent); --theme-bg-tint: var(--ocean-bg); --theme-card-bg: var(--ocean-card); --theme-glow: var(--ocean-glow); }
body.theme-mountain { --theme-primary: var(--mountain-primary); --theme-accent: var(--mountain-accent); --theme-bg-tint: var(--mountain-bg); --theme-card-bg: var(--mountain-card); --theme-glow: var(--mountain-glow); }

/* Sky Lighting Moods */
body.mood-sunset { --lighting-filter: sepia(0.3) saturate(1.35) hue-rotate(-12deg); }
body.mood-night { --lighting-filter: brightness(0.68) contrast(1.15) hue-rotate(190deg) saturate(1.25); }

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  width: 100%;
  height: 100%;
  min-height: 100dvh;
  background-color: #FFFFFF;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background-color: #FFFFFF;
  background-image: 
    radial-gradient(at 0% 0%, var(--theme-bg-tint) 0px, transparent 60%),
    radial-gradient(at 100% 100%, #F8FAFC 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-main);
  width: 100%;
  min-height: 100%;
  min-height: 100dvh;
  margin: 0;
  padding: 0;
  line-height: 1.5;
  transition: background-color var(--transition-normal);
  padding-bottom: calc(76px + env(safe-area-inset-bottom));
  overflow-x: hidden;
}

@media (min-width: 769px) {
  body {
    padding-bottom: 2rem;
  }
}

/* ==========================================================================
   Site Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--surface-200);
  box-shadow: var(--shadow-sm);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.brand-icon-box {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--theme-primary), var(--theme-accent));
  color: #FFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  box-shadow: 0 3px 8px var(--theme-glow);
  transition: transform var(--transition-bounce);
}

.brand-group:hover .brand-icon-box {
  transform: scale(1.08) rotate(-4deg);
}

.brand-text h1 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--surface-900);
  line-height: 1.1;
}

.brand-subtitle {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--theme-primary);
  display: block;
}

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

/* Student Profile Badge in Header */
.header-profile-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: #FFFFFF;
  border: 1.5px solid var(--surface-200);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition-bounce);
}

.header-profile-badge:hover, .header-profile-badge:active {
  transform: translateY(-2px) scale(1.03);
  border-color: var(--theme-primary);
  box-shadow: var(--shadow-pop);
}

.profile-badge-icon {
  font-size: 1.25rem;
}

.profile-badge-info {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.profile-badge-name {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--surface-900);
  line-height: 1.1;
}

.profile-badge-class {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--theme-primary);
}

/* Mood Selector */
.mood-selector {
  display: flex;
  background: var(--surface-100);
  padding: 2px;
  border-radius: var(--radius-full);
  border: 1px solid var(--surface-200);
}

.mood-btn {
  background: none;
  border: none;
  padding: 0.25rem 0.45rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 28px;
  min-height: 28px;
}

.mood-btn.active {
  background: #FFFFFF;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  transform: scale(1.05);
}

/* Audio Widget */
.audio-widget {
  display: flex;
  align-items: center;
}

.audio-play-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--surface-100);
  border: 1.5px solid var(--surface-200);
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--surface-800);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.audio-play-toggle:hover {
  background: #FFFFFF;
  border-color: var(--theme-primary);
}

.audio-play-toggle.playing {
  background: var(--theme-primary);
  color: #FFFFFF;
  border-color: var(--theme-primary);
  box-shadow: 0 0 12px var(--theme-glow);
  animation: pulse-glow 2s infinite alternate;
}

@keyframes pulse-glow {
  0% { box-shadow: 0 0 6px var(--theme-glow); }
  100% { box-shadow: 0 0 16px var(--theme-glow); }
}

.btn-primary-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-full);
  background: var(--surface-900);
  color: #FFFFFF;
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  box-shadow: 0 3px 8px rgba(15, 23, 42, 0.15);
  transition: all var(--transition-fast);
  min-height: 38px;
}

.btn-primary-pill:hover, .btn-primary-pill:active {
  transform: translateY(-2px);
  background: #000;
  box-shadow: 0 6px 14px rgba(15, 23, 42, 0.2);
}

.btn-secondary-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-full);
  background: var(--surface-100);
  color: var(--surface-900);
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
  border: 1.5px solid var(--surface-200);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-secondary-pill:hover {
  background: #FFFFFF;
  border-color: var(--theme-primary);
}

/* ==========================================================================
   Horizontal Scrolling Habitat Selector Strip
   ========================================================================== */
.habitat-strip-wrap {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--surface-200);
  padding: 0.5rem 0.75rem;
  position: sticky;
  top: 60px;
  z-index: 90;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.habitat-strip-wrap::-webkit-scrollbar {
  display: none;
}

.habitat-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  max-width: 1400px;
  margin: 0 auto;
  width: max-content;
}

.nav-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.95rem;
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 700;
  border: 1.5px solid var(--surface-200);
  background: #FFFFFF;
  color: var(--surface-700);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-bounce);
  white-space: nowrap;
  min-height: 40px;
}

.nav-item:hover {
  border-color: var(--theme-primary);
  transform: translateY(-2px);
}

.nav-item.active {
  background: var(--theme-primary);
  color: #FFFFFF;
  border-color: var(--theme-primary);
  box-shadow: 0 4px 12px var(--theme-glow);
  transform: scale(1.04);
}

/* ==========================================================================
   Desktop View Navigation Tabs Bar
   ========================================================================== */
.view-mode-bar {
  max-width: 1400px;
  margin: 0.75rem auto 0;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.view-tabs {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--surface-100);
  padding: 4px;
  border-radius: var(--radius-full);
  border: 1px solid var(--surface-200);
}

.view-tab-btn {
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 38px;
}

.view-tab-btn:hover {
  color: var(--surface-900);
}

.view-tab-btn.active {
  background: #FFFFFF;
  color: var(--surface-900);
  box-shadow: var(--shadow-sm);
}

.desktop-hint {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* ==========================================================================
   Main Content Layout
   ========================================================================== */
.main-content {
  max-width: 1400px;
  margin: 0.75rem auto;
  padding: 0 1rem;
}

/* Book Grid (Left: Artwork, Right: Dossier) */
.album-book-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 1.5rem;
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  border: 1px solid var(--surface-200);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

/* Left Page */
.album-page-left {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-header-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.plate-number {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.biome-tag-badge {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 800;
  padding: 0.25rem 0.7rem;
  border-radius: var(--radius-full);
  background: var(--theme-bg-tint);
  color: var(--theme-accent);
}

.habitat-title-box h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  font-weight: 900;
  color: var(--surface-900);
  line-height: 1.15;
}

.habitat-tagline {
  font-size: 0.92rem;
  color: var(--surface-700);
  margin-top: 0.2rem;
  font-weight: 500;
}

/* Interactive 16:9 Artwork Frame */
.interactive-artwork-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9.5;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 2px solid var(--surface-200);
  background: #000;
  touch-action: pan-y pinch-zoom;
}

.artwork-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: var(--lighting-filter);
  transition: filter var(--transition-normal), transform 0.4s ease;
}

.atmosphere-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
}

/* Hotspot Pins Layer */
.hotspot-layer {
  position: absolute;
  inset: 0;
  z-index: 20;
  pointer-events: auto;
}

.hotspot-pin {
  position: absolute;
  transform: translate(-50%, -50%);
  width: 46px;
  height: 46px;
  border-radius: var(--radius-full);
  background: #FFFFFF;
  border: 3px solid var(--theme-primary);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  cursor: pointer;
  transition: all var(--transition-bounce);
  animation: float-pin 3s ease-in-out infinite alternate;
  z-index: 25;
}

.hotspot-pin::after {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: var(--radius-full);
  border: 2px solid var(--theme-primary);
  opacity: 0.6;
  animation: pulse-ring 2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.9); opacity: 0.9; }
  100% { transform: scale(1.6); opacity: 0; }
}

@keyframes float-pin {
  0% { transform: translate(-50%, -50%) translateY(0); }
  100% { transform: translate(-50%, -50%) translateY(-6px); }
}

.hotspot-pin:hover, .hotspot-pin:active {
  transform: translate(-50%, -50%) scale(1.22);
  border-color: #000;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.hotspot-label-pill {
  position: absolute;
  bottom: -24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 23, 42, 0.88);
  color: #FFFFFF;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-xs);
  font-size: 0.68rem;
  font-weight: 700;
  white-space: nowrap;
  pointer-events: none;
  backdrop-filter: blur(4px);
}

.artwork-hint-pill {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(15, 23, 42, 0.85);
  color: #FFFFFF;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  z-index: 15;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.artwork-controls-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

.btn-micro-audio {
  background: var(--surface-100);
  border: 1px solid var(--surface-200);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--surface-800);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-micro-audio:hover {
  background: #FFFFFF;
  border-color: var(--theme-primary);
}

/* Quick Climate Metrics Strip */
.climate-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
}

.climate-card {
  background: var(--surface-50);
  border: 1.5px solid var(--surface-200);
  border-radius: var(--radius-md);
  padding: 0.65rem 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.climate-card-label {
  font-size: 0.7rem;
  font-weight: 800;
  color: var(--text-muted);
  text-transform: uppercase;
}

.climate-card-val {
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--surface-900);
}

/* Right Page: Dossier */
.album-page-right {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.dossier-story-box {
  background: var(--theme-card-bg);
  border: 1.5px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.1rem;
}

.dossier-story-tag {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--theme-primary);
  margin-bottom: 0.25rem;
}

.dossier-overview-p {
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--surface-800);
  font-weight: 500;
}

/* 3 Segmented Tabs */
.dossier-nav-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.35rem;
  background: var(--surface-100);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--surface-200);
}

.dossier-tab-btn {
  padding: 0.55rem 0.5rem;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  min-height: 42px;
}

.dossier-tab-btn:hover {
  color: var(--surface-900);
}

.dossier-tab-btn.active {
  background: #FFFFFF;
  color: var(--theme-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Animal Cards List */
.dossier-dynamic-wrap {
  min-height: 280px;
}

.animal-cards-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.kid-animal-card {
  background: #FFFFFF;
  border: 2px solid var(--surface-200);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: all var(--transition-bounce);
  box-shadow: var(--shadow-sm);
}

.kid-animal-card:hover {
  border-color: var(--theme-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-pop);
}

.animal-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.animal-identity {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.animal-avatar-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--theme-bg-tint);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  flex-shrink: 0;
}

.animal-name-box h4 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--surface-900);
  line-height: 1.15;
}

.animal-diet-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
}

.btn-ar-launch {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: linear-gradient(135deg, #4F46E5, #3730A3);
  color: #FFFFFF;
  border: none;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 3px 10px rgba(79, 70, 229, 0.3);
  transition: all var(--transition-fast);
  min-height: 36px;
  flex-shrink: 0;
}

.btn-ar-launch:hover, .btn-ar-launch:active {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.45);
}

.superpower-desc {
  font-size: 0.85rem;
  color: var(--surface-700);
  line-height: 1.45;
}

.superpower-desc strong {
  color: var(--theme-accent);
}

/* Food Chain / Who Eats Whom Cards */
.food-chain-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.food-chain-tier {
  background: var(--surface-50);
  border: 1.5px solid var(--surface-200);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.food-chain-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
}

.food-chain-info h4 {
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--surface-900);
}

.food-chain-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.food-chain-arrow {
  text-align: center;
  font-size: 1.1rem;
  color: var(--theme-primary);
  margin: -0.3rem 0;
}

/* Wild Secrets / Fun Facts */
.facts-grid {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.fact-card {
  background: var(--theme-card-bg);
  border: 1.5px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.1rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.fact-icon {
  font-size: 1.6rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.fact-text h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--theme-accent);
  margin-bottom: 0.15rem;
}

.fact-text p {
  font-size: 0.85rem;
  color: var(--surface-800);
  line-height: 1.45;
}

/* Bottom Habitat Stepper */
.album-bottom-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.25rem;
  gap: 1rem;
}

.page-stepper-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-full);
  border: 2px solid var(--surface-200);
  background: #FFFFFF;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--surface-800);
  cursor: pointer;
  transition: all var(--transition-bounce);
  min-height: 48px;
  box-shadow: var(--shadow-sm);
}

.page-stepper-btn:hover:not(:disabled), .page-stepper-btn:active:not(:disabled) {
  background: var(--theme-primary);
  color: #FFFFFF;
  border-color: var(--theme-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-pop);
}

.page-stepper-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.pagination-dots {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.dot-btn {
  width: 14px;
  height: 14px;
  border-radius: var(--radius-full);
  border: 2px solid var(--surface-300);
  background: #FFFFFF;
  cursor: pointer;
  transition: all var(--transition-bounce);
  padding: 0;
}

.dot-btn.active {
  width: 32px;
  background: var(--theme-primary);
  border-color: var(--theme-primary);
}


/* ==========================================================================
   3. All Habitats Grid View
   ========================================================================== */
.view-grid-container {
  display: none;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.grid-card {
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  border: 1.5px solid var(--surface-200);
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-bounce);
}

.grid-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--theme-primary);
}

.grid-card-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.grid-card-body {
  padding: 1.1rem;
}

.grid-card-tag {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.grid-card-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 800;
  margin: 0.2rem 0;
  color: var(--surface-900);
}

.grid-card-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Comparison Matrix */
.view-matrix-container {
  display: none;
  margin-top: 1.5rem;
}

.matrix-card {
  background: #FFFFFF;
  padding: 1.5rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--surface-200);
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
}

.matrix-table th {
  padding: 0.75rem 1rem;
  background: var(--surface-50);
  font-family: var(--font-heading);
  font-weight: 800;
  border-bottom: 2px solid var(--surface-200);
}

.matrix-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--surface-200);
}

/* ==========================================================================
   4. About Page / Student Profile View
   ========================================================================== */
.view-about-container {
  display: none;
  flex-direction: column;
  gap: 1.5rem;
}

.about-hero-card {
  background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
  color: #FFFFFF;
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
}

.about-hero-card::after {
  content: '🌍';
  position: absolute;
  right: -20px;
  bottom: -30px;
  font-size: 9rem;
  opacity: 0.08;
  pointer-events: none;
}

.about-student-profile {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.about-student-avatar {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #3B82F6, #1D4ED8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  border: 3px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  flex-shrink: 0;
}

.about-student-info h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.about-badge-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.35rem;
  flex-wrap: wrap;
}

.about-pill-badge {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.about-pill-badge.school-tag {
  background: #10B981;
  border-color: #10B981;
  color: #FFFFFF;
}

.about-pill-badge.class-tag {
  background: #F59E0B;
  border-color: #F59E0B;
  color: #FFFFFF;
}

.about-student-quote {
  background: rgba(255, 255, 255, 0.08);
  border: 1px dashed rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.1rem;
  font-size: 0.88rem;
  color: #E2E8F0;
  max-width: 420px;
  line-height: 1.45;
}

.about-grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
}

.about-info-card {
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  border: 1.5px solid var(--surface-200);
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-bounce);
}

.about-info-card:hover {
  transform: translateY(-3px);
  border-color: var(--theme-primary);
  box-shadow: var(--shadow-md);
}

.about-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.about-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--surface-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  flex-shrink: 0;
}

.about-card-header h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--surface-900);
}

.about-details-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-size: 0.88rem;
  color: var(--surface-700);
}

.about-details-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  line-height: 1.45;
}

.about-details-list strong {
  color: var(--surface-900);
}

.about-actions-box {
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  border: 1.5px solid var(--surface-200);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Mobile Bottom Navigation Bar
   ========================================================================== */
.mobile-bottom-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--surface-200);
  padding: 0.35rem 0.5rem calc(0.35rem + env(safe-area-inset-bottom));
  z-index: 200;
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.06);
}

.mobile-nav-items {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.25rem;
  max-width: 500px;
  margin: 0 auto;
}

.mobile-nav-btn {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.15rem;
  background: none;
  border: none;
  padding: 0.4rem 0.2rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 48px;
}

.mobile-nav-icon {
  font-size: 1.35rem;
  transition: transform var(--transition-bounce);
}

.mobile-nav-label {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
}

.mobile-nav-btn.active .mobile-nav-icon {
  transform: scale(1.15);
}

.mobile-nav-btn.active .mobile-nav-label {
  color: var(--theme-primary);
  font-weight: 800;
}

/* ==========================================================================
   Modals (AR Animal, Hotspot Details)
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  max-width: 640px;
  width: 100%;
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px) scale(0.96);
  transition: all var(--transition-bounce);
}

.modal-backdrop.open .modal-content {
  transform: translateY(0) scale(1);
}

.modal-compact {
  max-width: 460px;
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.modal-tag {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--theme-primary);
}

.modal-tag.ar-tag {
  color: #4F46E5;
}

.modal-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--surface-900);
}

.modal-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.btn-close-modal {
  background: var(--surface-100);
  border: none;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  font-size: 1.4rem;
  color: var(--surface-700);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.btn-close-modal:hover {
  background: var(--surface-200);
  color: #000;
}

/* AR Modal Layout */
.ar-modal-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1.25rem;
  align-items: center;
}

.ar-hologram-preview {
  background: radial-gradient(circle at center, rgba(79, 70, 229, 0.18) 0%, rgba(15, 23, 42, 0.02) 70%);
  border: 2px dashed #C7D2FE;
  border-radius: var(--radius-lg);
  padding: 1rem;
  text-align: center;
  margin-bottom: 0.75rem;
}

.ar-animal-avatar {
  font-size: 4.5rem;
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.15));
  animation: float-3d 3s ease-in-out infinite alternate;
}

@keyframes float-3d {
  0% { transform: translateY(0px) rotate(0deg); }
  100% { transform: translateY(-8px) rotate(3deg); }
}

.ar-status-pill {
  font-size: 0.75rem;
  font-weight: 800;
  color: #4F46E5;
  margin-top: 0.3rem;
}

.ar-quick-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.stat-pill {
  background: var(--surface-50);
  border: 1px solid var(--surface-200);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
}

.superpower-card {
  background: #EEF2FF;
  border: 1.5px solid #C7D2FE;
  border-radius: var(--radius-md);
  padding: 0.75rem 0.9rem;
  margin-bottom: 0.75rem;
}

.superpower-card h4 {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 800;
  color: #3730A3;
  margin-bottom: 0.2rem;
}

.superpower-card p {
  font-size: 0.82rem;
  color: #1E1B4B;
  line-height: 1.4;
}

.modal-btn-row {
  display: flex;
  gap: 0.5rem;
}

.ar-qr-box {
  background: #FFFFFF;
  border: 2px solid var(--surface-200);
  border-radius: var(--radius-lg);
  padding: 1rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.ar-qr-box h4 {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  color: #4F46E5;
  margin-bottom: 0.4rem;
}

.ar-qr-box p {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  line-height: 1.35;
}

.qr-container {
  display: flex;
  justify-content: center;
  padding: 0.4rem;
}

/* Hotspot Modal Body */
.hotspot-modal-body {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin: 1rem 0 1.25rem;
}

.hotspot-modal-icon {
  font-size: 2.5rem;
  width: 56px;
  height: 56px;
  background: var(--theme-bg-tint);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.hotspot-modal-desc {
  font-size: 0.92rem;
  color: var(--surface-700);
  line-height: 1.55;
}

.modal-footer-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {
  @page {
    margin: 1cm;
    size: A4 portrait;
  }
  body { 
    background: #FFFFFF !important; 
    color: #000000 !important; 
    padding-bottom: 0 !important; 
    margin: 0 !important; 
  }
  .site-header, 
  .habitat-strip-wrap, 
  .view-mode-bar, 
  .album-bottom-nav, 
  .modal-backdrop, 
  .mobile-bottom-bar, 
  .fullscreen-ar-studio, 
  .main-content, 
  .about-actions-box,
  button, 
  .btn-primary-pill, 
  .btn-secondary-pill { 
    display: none !important; 
  }
  .print-only-container { 
    display: block !important; 
  }
  .print-page-break { 
    page-break-after: always; 
    break-after: page; 
    padding-top: 0.5cm; 
  }
  .print-habitat-page { 
    display: grid; 
    grid-template-columns: 1fr 1.2fr; 
    gap: 0.8cm; 
  }
}

.print-only-container {
  display: none;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .album-book-grid {
    grid-template-columns: 1fr;
    padding: 1.25rem;
  }
  .tools-grid {
    grid-template-columns: 1fr;
  }
  .about-hero-card {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 768px) {
  .view-mode-bar {
    display: none;
  }
  .mobile-bottom-bar {
    display: block;
  }
  .no-mobile {
    display: none !important;
  }
  .header-container {
    height: 56px;
    padding: 0 0.75rem;
  }
  .brand-text h1 {
    font-size: 1.05rem;
  }
  .brand-subtitle {
    display: none;
  }
  .habitat-strip-wrap {
    top: 56px;
    padding: 0.4rem 0.5rem;
  }
  .nav-item {
    font-size: 0.82rem;
    padding: 0.4rem 0.8rem;
    min-height: 38px;
  }
  .album-book-grid {
    padding: 1rem;
    border-radius: var(--radius-lg);
    gap: 1.25rem;
  }
  .climate-strip {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.4rem;
  }
  .climate-card {
    padding: 0.5rem 0.6rem;
  }
  .climate-card-val {
    font-size: 0.78rem;
  }
  .dossier-tab-btn {
    font-size: 0.75rem;
    padding: 0.45rem 0.25rem;
  }
  .ar-modal-layout {
    grid-template-columns: 1fr;
  }
  .about-hero-card {
    padding: 1.25rem;
  }
  .about-student-info h2 {
    font-size: 1.35rem;
  }
  .about-actions-box {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .header-actions {
    gap: 0.35rem;
  }
  .audio-play-toggle .audio-label {
    display: none;
  }
  .header-profile-badge .profile-badge-class {
    display: none;
  }
  .climate-strip {
    grid-template-columns: 1fr;
  }
  .interactive-artwork-frame {
    aspect-ratio: 16 / 11;
  }
  .hotspot-pin {
    width: 42px;
    height: 42px;
    font-size: 1.2rem;
  }
  .hotspot-label-pill {
    display: none;
  }
  .page-stepper-btn span {
    font-size: 0.82rem;
  }
}

/* ==========================================================================
   FULLSCREEN 3D AR REALISTIC ANIMAL BROWSER & CAMERA HUD
   ========================================================================== */

.fullscreen-ar-studio {
  position: fixed;
  inset: 0;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100vw;
  width: 100dvw;
  height: 100vh;
  height: 100dvh;
  margin: 0;
  padding: 0;
  z-index: 99999;
  background: radial-gradient(circle at center, #1E293B 0%, #030712 100%);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

body.in-ar-studio {
  overflow: hidden !important;
  height: 100dvh !important;
  padding-bottom: 0 !important;
  margin: 0 !important;
}

body.in-ar-studio .mobile-bottom-bar,
body.in-ar-studio .site-header,
body.in-ar-studio .view-mode-bar,
body.in-ar-studio .main-content {
  display: none !important;
}

/* Real-Time Camera Passthrough Video */
.ar-live-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  width: 100dvw;
  height: 100vh;
  height: 100dvh;
  object-fit: cover;
  z-index: 1;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
}

body.in-fullscreen-ar-mode .ar-live-video {
  opacity: 1;
}

body.in-fullscreen-ar-mode .fullscreen-ar-studio {
  background: transparent !important;
}

/* 3D WebGL Canvas Layer */
.ar-canvas-wrap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  width: 100dvw;
  height: 100vh;
  height: 100dvh;
  z-index: 2;
  pointer-events: auto;
}

#arFullscreenCanvas {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  pointer-events: auto;
  cursor: grab;
}

#arFullscreenCanvas:active {
  cursor: grabbing;
}

/* Clean Minimalist HUD Layer */
.ar-clean-hud {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  box-sizing: border-box;
}

.hud-top-bar,
.hud-bottom-bar {
  pointer-events: auto;
}

/* Top Navigation & Info Bar (Dark Immersive Glass) */
.hud-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  background: rgba(15, 23, 42, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  padding: 0.65rem 1.1rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}

.hud-title-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.hud-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #FFFFFF;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: 0.84rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 40px;
}

.hud-btn:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-1px);
}

.hud-btn:active,
.hud-btn.active {
  background: #0284C7;
  border-color: #38BDF8;
  color: #FFFFFF;
}

.hud-btn-back {
  background: rgba(239, 68, 68, 0.25);
  border-color: rgba(239, 68, 68, 0.4);
  color: #FCA5A5;
}

.hud-btn-back:hover {
  background: #EF4444;
  color: #FFFFFF;
}

.hud-species-info h2 {
  font-size: 1.15rem;
  font-weight: 800;
  color: #FFFFFF;
  margin: 0;
  line-height: 1.2;
}

.hud-species-info span {
  font-size: 0.76rem;
  color: #94A3B8;
  font-weight: 500;
}

.hud-top-actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

/* Floating Gesture Guide Hint */
.hud-gesture-guide {
  align-self: center;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #E2E8F0;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.76rem;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  pointer-events: none;
  opacity: 0.9;
}

/* Bottom Controls: Species Carousel & Shutter Button */
.hud-bottom-bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  width: 100%;
}

.hud-species-carousel-wrap {
  width: 100%;
  max-width: 900px;
  overflow-x: auto;
  padding: 0.35rem 0.5rem;
  -webkit-overflow-scrolling: touch;
}

.hud-species-carousel {
  display: flex;
  gap: 0.55rem;
  width: max-content;
  margin: 0 auto;
}

.hud-species-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  background: rgba(15, 23, 42, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 2px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.85rem;
  color: #FFFFFF;
  cursor: pointer;
  transition: var(--transition-bounce);
  min-width: 76px;
}

.hud-species-card .card-emoji {
  font-size: 1.7rem;
  line-height: 1;
}

.hud-species-card .card-title {
  font-size: 0.72rem;
  font-weight: 800;
}

.hud-species-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.35);
}

.hud-species-card.active {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.95), rgba(56, 189, 248, 0.95));
  border-color: #38BDF8;
  color: #FFFFFF;
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.45);
}

/* Big Camera Shutter Button */
.hud-shutter-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 0.25rem;
}

.hud-shutter-button {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  border: 4px solid #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  padding: 0;
  box-shadow: 0 0 28px rgba(255, 255, 255, 0.45);
}

.shutter-inner {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: #FFFFFF;
  transition: transform 0.1s ease, background 0.1s ease;
}

.hud-shutter-button:hover {
  transform: scale(1.08);
  box-shadow: 0 0 35px rgba(255, 255, 255, 0.65);
}

.hud-shutter-button:active .shutter-inner {
  transform: scale(0.86);
  background: #EF4444;
}

/* Instant Camera Screen Flash */
.hud-screen-flash {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: #FFFFFF;
  opacity: 0;
  pointer-events: none;
  z-index: 1000;
  transition: opacity 0.1s ease;
}

.hud-screen-flash.flash {
  opacity: 0.95;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .ar-clean-hud {
    padding: 0.75rem 0.65rem;
  }
  .hud-top-bar {
    padding: 0.5rem 0.75rem;
  }
  .hud-species-info h2 {
    font-size: 0.95rem;
  }
  .hud-species-info span {
    font-size: 0.68rem;
  }
  .hud-btn span:not(#arCamBtnIcon) {
    display: none;
  }
  .hud-btn {
    padding: 0.45rem 0.65rem;
    min-height: 36px;
  }
  .hud-btn-back span {
    display: inline !important;
  }
  .hud-gesture-guide {
    font-size: 0.68rem;
    padding: 0.25rem 0.6rem;
  }
  .hud-shutter-button {
    width: 64px;
    height: 64px;
  }
  .shutter-inner {
    width: 48px;
    height: 48px;
  }
}