:root {
  --bg-dark: #0a0e17;
  --bg-card: rgba(18, 24, 38, 0.85);
  --bg-card-hover: rgba(26, 35, 56, 0.95);
  --border-card: rgba(255, 255, 255, 0.08);
  --border-card-hover: rgba(245, 158, 11, 0.4);
  --accent-gold: #f59e0b;
  --accent-gold-light: #fbbf24;
  --accent-amber-glow: rgba(245, 158, 11, 0.25);
  --accent-cyan: #38bdf8;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-sub: #cbd5e1;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 12px 30px -10px rgba(0, 0, 0, 0.5), 0 4px 10px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 35px var(--accent-amber-glow);
  --transition-smooth: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

/* Background Atmosphere */
.bg-ambient {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: 
    radial-gradient(circle at 15% 20%, rgba(245, 158, 11, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(56, 189, 248, 0.06) 0%, transparent 45%),
    radial-gradient(circle at 50% 50%, rgba(15, 23, 42, 0.9) 0%, #070a10 100%);
}

.presentation-container {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  z-index: 1;
}

/* Top Progress Bar */
.progress-bar-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  z-index: 50;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-gold), var(--accent-gold-light));
  box-shadow: 0 0 10px var(--accent-gold);
  transition: width 0.4s ease;
}

/* Slide Viewport */
.slide-viewport {
  flex: 1;
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 30px 85px 30px;
}

.slide {
  position: absolute;
  inset: 20px 30px 85px 30px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.98);
  transition: opacity 0.45s ease, transform 0.45s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.45s;
  display: flex;
  flex-direction: column;
  pointer-events: none;
  overflow-y: auto;
  scrollbar-width: none;
}

.slide::-webkit-scrollbar {
  display: none;
}

.slide.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

/* Hero / Title Slide */
.hero-slide-content {
  margin: auto;
  max-width: 900px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 999px;
  color: var(--accent-gold-light);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  background: linear-gradient(135deg, #ffffff 40%, var(--accent-gold-light) 90%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--text-sub);
  line-height: 1.6;
  max-width: 760px;
}

.hero-note {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-style: italic;
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent-gold);
}

.hero-btn {
  margin-top: 15px;
  padding: 16px 36px;
  background: linear-gradient(135deg, var(--accent-gold), #d97706);
  color: #0b0f17;
  font-size: 1.2rem;
  font-weight: 700;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 10px 25px rgba(245, 158, 11, 0.4);
  transition: var(--transition-smooth);
}

.hero-btn:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 15px 35px rgba(245, 158, 11, 0.6);
  background: linear-gradient(135deg, var(--accent-gold-light), #f59e0b);
}

/* Standard Photo Slide Header */
.slide-header {
  margin-bottom: 20px;
  flex-shrink: 0;
}

.slide-tag {
  color: var(--accent-gold-light);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 6px;
}

.slide-title {
  font-size: clamp(1.6rem, 2.8vw, 2.4rem);
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

.slide-description {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 850px;
  line-height: 1.45;
}

/* Photo Grids */
.photos-grid {
  flex: 1;
  width: 100%;
  display: grid;
  gap: 24px;
  min-height: 0;
}

/* Grid Layouts by count */
.grid-count-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-count-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-count-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Responsive adjustment for small screens */
@media (max-width: 1100px) {
  .grid-count-4 {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
  }
}

@media (max-width: 800px) {
  .grid-count-3 {
    grid-template-columns: repeat(1, 1fr);
  }
  .grid-count-2 {
    grid-template-columns: repeat(1, 1fr);
  }
}

/* Photo Card */
.photo-card {
  position: relative;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: var(--transition-smooth);
  cursor: pointer;
}

.photo-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-card-hover);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  background: var(--bg-card-hover);
}

.card-image-wrap {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  background: #06090f;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.photo-card:hover .card-img {
  transform: scale(1.05);
}

.card-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 4px 12px;
  background: rgba(10, 14, 23, 0.75);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-gold-light);
  z-index: 2;
}

.card-zoom-hint {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  background: rgba(10, 14, 23, 0.75);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  opacity: 0;
  transform: scale(0.8);
  transition: var(--transition-smooth);
  z-index: 2;
}

.photo-card:hover .card-zoom-hint {
  opacity: 1;
  transform: scale(1);
}

.card-info {
  padding: 16px 20px;
  background: rgba(14, 20, 32, 0.95);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  flex-shrink: 0;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

.card-caption {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.45;
}

/* Finale / Congrats Slide */
.congrats-content {
  margin: auto;
  max-width: 960px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding-bottom: 30px;
}

.congrats-title {
  font-size: clamp(2rem, 4vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #ffffff 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
}

.congrats-subtitle {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  color: var(--text-sub);
  max-width: 800px;
  line-height: 1.45;
}

.wishes-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(245, 158, 11, 0.3);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6), var(--shadow-glow);
  border-radius: var(--radius-lg);
  padding: 20px 30px;
  text-align: left;
  max-width: 760px;
  width: 100%;
}

.wishes-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.wishes-list li {
  position: relative;
  padding-left: 28px;
  font-size: 1.02rem;
  color: #f1f5f9;
  line-height: 1.35;
}

.wishes-list li::before {
  content: "★";
  position: absolute;
  left: 0;
  color: var(--accent-gold-light);
  font-size: 1.2rem;
}

.congrats-closing {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-gold-light);
}

@media (max-height: 850px) {
  .slide-viewport {
    padding: 12px 20px 80px 20px;
  }
  .slide-header {
    margin-bottom: 10px;
  }
  .slide-title {
    font-size: 1.6rem;
    margin-bottom: 2px;
  }
  .slide-description {
    font-size: 0.88rem;
    line-height: 1.3;
  }
  .card-info {
    padding: 10px 14px;
  }
  .card-title {
    font-size: 0.95rem;
    margin-bottom: 3px;
  }
  .card-caption {
    font-size: 0.8rem;
    line-height: 1.3;
  }
  .congrats-content {
    gap: 8px;
    padding-bottom: 10px;
  }
  .congrats-title {
    font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  }
  .congrats-subtitle {
    font-size: 0.95rem;
    line-height: 1.3;
  }
  .wishes-card {
    padding: 12px 20px;
  }
  .wishes-list {
    gap: 6px;
  }
  .wishes-list li {
    font-size: 0.92rem;
    line-height: 1.25;
  }
  .congrats-closing {
    font-size: 1.05rem;
  }
  .confetti-trigger-btn, .restart-btn {
    padding: 10px 22px;
    font-size: 0.92rem;
  }
}

.congrats-actions {
  display: flex;
  gap: 16px;
  margin-top: 10px;
}

.confetti-trigger-btn {
  padding: 14px 30px;
  background: linear-gradient(135deg, var(--accent-gold), #d97706);
  color: #090d16;
  font-size: 1.05rem;
  font-weight: 700;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(245, 158, 11, 0.4);
  transition: var(--transition-smooth);
}

.confetti-trigger-btn:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 12px 30px rgba(245, 158, 11, 0.6);
}

.restart-btn {
  padding: 14px 28px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.restart-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}

/* Floating Bottom Navigation Bar */
.bottom-nav {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(14, 20, 32, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 8px 16px;
  border-radius: 999px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  z-index: 40;
}

.nav-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.nav-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
  transform: scale(1.05);
}

.nav-btn:active {
  transform: scale(0.95);
}

.nav-btn.primary {
  background: rgba(245, 158, 11, 0.2);
  color: var(--accent-gold-light);
  border: 1px solid rgba(245, 158, 11, 0.4);
}

.nav-btn.primary:hover {
  background: var(--accent-gold);
  color: #090d16;
}

.slide-counter {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-sub);
  padding: 0 10px;
  font-variant-numeric: tabular-nums;
  display: flex;
  align-items: center;
  gap: 4px;
}

.counter-current {
  color: var(--accent-gold-light);
  font-size: 1.05rem;
}

.nav-divider {
  width: 1px;
  height: 20px;
  background: rgba(255, 255, 255, 0.15);
}

/* Keyboard hint in bottom corner */
.keyboard-hint {
  position: absolute;
  bottom: 24px;
  right: 30px;
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 30;
  background: rgba(14, 20, 32, 0.6);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.kbd {
  background: rgba(255, 255, 255, 0.12);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.72rem;
  color: var(--text-sub);
  font-weight: 600;
}

/* Lightbox Modal */
.lightbox-modal {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 14, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s;
  padding: 30px;
}

.lightbox-modal.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.lightbox-img-wrap {
  max-width: 85vw;
  max-height: 75vh;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.lightbox-img {
  max-width: 100%;
  max-height: 75vh;
  object-fit: contain;
}

.lightbox-info {
  background: rgba(18, 24, 38, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 14px 24px;
  max-width: 800px;
  text-align: center;
}

.lightbox-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-gold-light);
  margin-bottom: 4px;
}

.lightbox-caption {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.45;
}

.lightbox-close-btn {
  position: absolute;
  top: 20px;
  right: 25px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  z-index: 120;
}

.lightbox-close-btn:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: scale(1.1);
}

.lightbox-counter {
  position: absolute;
  top: -24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(14, 20, 32, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--accent-gold-light);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 999px;
  letter-spacing: 1px;
}

.lightbox-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(14, 20, 32, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 2rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 110;
  transition: var(--transition-smooth);
}

.lightbox-nav-btn:hover {
  background: rgba(245, 158, 11, 0.25);
  border-color: var(--accent-gold);
  color: var(--accent-gold-light);
  transform: translateY(-50%) scale(1.1);
}

.lightbox-nav-btn.lb-prev {
  left: 20px;
}

.lightbox-nav-btn.lb-next {
  right: 20px;
}

/* Thumbnails Drawer Modal */
.drawer-modal {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 14, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s;
  display: flex;
  flex-direction: column;
  padding: 40px;
}

.drawer-modal.active {
  opacity: 1;
  visibility: visible;
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  flex-shrink: 0;
}

.drawer-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
}

.drawer-close-btn {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
}

.drawer-grid {
  flex: 1;
  overflow-y: auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  padding-right: 10px;
}

.drawer-item {
  background: rgba(20, 28, 44, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: var(--transition-smooth);
}

.drawer-item:hover {
  border-color: var(--accent-gold);
  transform: translateY(-4px);
  background: rgba(30, 42, 68, 0.9);
}

.drawer-item.active {
  border-color: var(--accent-gold);
  box-shadow: 0 0 15px var(--accent-amber-glow);
}

.drawer-item-preview {
  width: 100%;
  height: 120px;
  background: #090e18;
  border-radius: var(--radius-sm);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.drawer-item-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.drawer-item-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: #fff;
  line-height: 1.3;
}

.drawer-item-num {
  font-size: 0.75rem;
  color: var(--accent-gold-light);
  font-weight: 700;
}

/* Canvas Confetti */
#confetti-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 150;
}