@import url('https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,300;0,400;0,600;1,300&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&display=swap');

:root {
  --bg-primary: #0a0314;
  --bg-secondary: #17072a;
  --color-gold: #d4af37;
  --color-gold-light: #f7e7ce;
  --color-rose-gold: #b76e79;
  --color-rose-gold-light: #e0b0ff;
  --color-text-primary: #f5f5f7;
  --color-text-secondary: #c7c7cc;
  --font-serif: 'Playfair Display', serif;
  --font-sans: 'Montserrat', sans-serif;
  --transition-speed: 0.8s;
  --ease-custom: cubic-bezier(0.25, 1, 0.5, 1);
}

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

html, body {
  width: 100%;
  height: 100%;
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--color-text-primary);
  overflow: hidden;
  user-select: none;
}

/* Canvas Particle Background */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

/* Confetti Canvas */
#confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 999;
  pointer-events: none;
}

/* Layout and Slider */
.slider-container {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow-y: scroll;
  scroll-snap-type: y mandatory;
  scroll-behavior: smooth;
  z-index: 2;
  scrollbar-width: none; /* Firefox */
}

.slider-container::-webkit-scrollbar {
  display: none; /* Chrome, Safari, Opera */
}

.slide {
  position: relative;
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  padding: 2rem 10%;
  overflow: hidden;
}

.slide-content {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 4rem;
  width: 100%;
  max-width: 1200px;
  align-items: center;
  z-index: 5;
}

/* Right-aligned content variation */
.slide:nth-child(even) .slide-content {
  grid-template-columns: 1fr 1.2fr;
}
.slide:nth-child(even) .text-panel {
  order: 2;
}
.slide:nth-child(even) .image-panel {
  order: 1;
}

/* Text Panel styling */
.text-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1.2s var(--ease-custom), transform 1.2s var(--ease-custom);
}

.text-badge {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-rose-gold);
  font-weight: 600;
  margin-bottom: -0.5rem;
}

.slide-title {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.2;
  background: linear-gradient(135deg, var(--color-gold-light) 0%, var(--color-gold) 50%, var(--color-rose-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

.slide-text {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  font-weight: 300;
}

.slide-text strong {
  font-weight: 600;
  color: var(--color-gold-light);
}

/* Image Panel (3D Container) */
.image-panel {
  perspective: 1500px;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transform: translateY(40px) scale(0.95);
  transition: opacity 1.2s var(--ease-custom), transform 1.2s var(--ease-custom);
  transition-delay: 0.2s;
}

.card-3d-wrapper {
  position: relative;
  width: 100%;
  max-width: 420px;
  aspect-ratio: 4 / 5;
  border-radius: 20px;
  transform-style: preserve-3d;
  transition: transform 0.1s ease-out;
}

.card-3d {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4),
              inset 0 0 0 1px rgba(255, 255, 255, 0.05);
  overflow: hidden;
  backdrop-filter: blur(12px);
  transform-style: preserve-3d;
  display: flex;
  justify-content: center;
  align-items: center;
}

.card-image {
  width: 93%;
  height: 94%;
  object-fit: cover;
  border-radius: 14px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  transform: translateZ(30px); /* 3D pop effect */
  transition: transform 0.3s var(--ease-custom);
  pointer-events: none;
}

/* Image card decoration */
.card-decor {
  position: absolute;
  border: 1px solid rgba(212, 175, 55, 0.2);
  top: 15px;
  left: 15px;
  right: 15px;
  bottom: 15px;
  border-radius: 16px;
  pointer-events: none;
  transform: translateZ(10px);
}

.card-glow {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, 0.08) 0%, transparent 60%);
  pointer-events: none;
  z-index: 5;
}

/* Interactive Ending Slide (Slide 4) */
.proposal-slide {
  background: radial-gradient(circle at center, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.proposal-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  width: 100%;
  max-width: 900px;
  z-index: 5;
  gap: 1.2rem;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1.2s var(--ease-custom), transform 1.2s var(--ease-custom);
}

.date-badge {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  letter-spacing: 0.15em;
  color: var(--color-gold);
  background: rgba(212, 175, 55, 0.08);
  border: 1px solid rgba(212, 175, 55, 0.25);
  padding: 0.6rem 2rem;
  border-radius: 50px;
  box-shadow: 0 0 20px rgba(212, 175, 55, 0.05);
  margin-bottom: 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  transform: translateZ(15px);
}

.date-badge span {
  font-weight: 600;
  color: var(--color-gold-light);
}

.destination-cards {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  width: 100%;
  margin-top: 1rem;
}

.dest-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  padding: 1.5rem 1.5rem;
  cursor: pointer;
  transition: all 0.4s var(--ease-custom);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  align-items: center;
  backdrop-filter: blur(10px);
  max-width: 450px;
  width: 100%;
  margin: 0 auto;
}

.dest-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--color-rose-gold);
  transform: translateY(-8px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3),
              0 0 15px rgba(183, 110, 121, 0.1);
}

.dest-card.selected {
  background: rgba(183, 110, 121, 0.08);
  border-color: var(--color-gold);
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4),
              0 0 20px rgba(212, 175, 55, 0.2);
}

.dest-icon {
  font-size: 2.2rem;
}

.dest-name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-gold-light);
}

.dest-desc {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.action-btn {
  font-family: var(--font-sans);
  background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-rose-gold) 100%);
  color: #fff;
  border: none;
  padding: 1rem 3rem;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s var(--ease-custom);
  box-shadow: 0 10px 30px rgba(183, 110, 121, 0.3),
              inset 0 1px 0 rgba(255, 255, 255, 0.2);
  margin-top: 0.5rem;
  position: relative;
  overflow: hidden;
}

.action-btn::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 60%);
  transform: scale(0);
  transition: transform 0.5s ease-out;
  pointer-events: none;
}

.action-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 40px rgba(183, 110, 121, 0.5),
              0 0 20px rgba(212, 175, 55, 0.3);
}

.action-btn:hover::after {
  transform: scale(1);
}

/* Active Class states for reveals */
.slide.active .text-panel {
  opacity: 1;
  transform: translateY(0);
}

.slide.active .image-panel {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.slide.active .proposal-container {
  opacity: 1;
  transform: translateY(0);
}

/* Slide indicators / Dots */
.nav-dots {
  position: fixed;
  right: 2.5rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  z-index: 100;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.4);
  background: transparent;
  cursor: pointer;
  transition: all 0.3s ease;
}

.dot:hover {
  border-color: var(--color-rose-gold);
  transform: scale(1.3);
}

.dot.active {
  background: var(--color-gold);
  border-color: var(--color-gold);
  box-shadow: 0 0 10px var(--color-gold);
  transform: scale(1.3);
}

/* Reveal Overlay / Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 3, 20, 0.85);
  backdrop-filter: blur(15px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.6s var(--ease-custom);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal-card {
  background: radial-gradient(circle at center, rgba(30, 15, 50, 0.95) 0%, rgba(10, 5, 20, 0.95) 100%);
  border: 1px solid rgba(212, 175, 55, 0.3);
  box-shadow: 0 40px 80px rgba(0, 0, 0, 0.7),
              0 0 30px rgba(212, 175, 55, 0.1);
  padding: 3.5rem 2.5rem;
  border-radius: 24px;
  max-width: 550px;
  width: 90%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  transform: scale(0.9) rotate(-1deg);
  transition: transform 0.6s var(--ease-custom);
}

.modal-overlay.active .modal-card {
  transform: scale(1) rotate(0deg);
}

.modal-icon {
  font-size: 3.5rem;
  animation: pulse-heart 1.5s infinite alternate;
}

.modal-title {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  background: linear-gradient(135deg, var(--color-gold-light) 0%, var(--color-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.modal-text {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.close-btn {
  font-family: var(--font-sans);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-text-secondary);
  padding: 0.8rem 2.2rem;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: 1rem;
}

.close-btn:hover {
  border-color: var(--color-rose-gold);
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.02);
}

@keyframes pulse-heart {
  0% { transform: scale(1); }
  100% { transform: scale(1.15); }
}

/* Mouse scroll indicator indicator at the bottom of slide 1 */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0.7;
  z-index: 5;
}

.mouse {
  width: 26px;
  height: 42px;
  border: 2px solid var(--color-text-secondary);
  border-radius: 20px;
  position: relative;
}

.wheel {
  width: 4px;
  height: 8px;
  background-color: var(--color-gold);
  border-radius: 2px;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll-wheel 1.6s infinite;
}

@keyframes scroll-wheel {
  0% { opacity: 1; transform: translate(-50%, 0); }
  100% { opacity: 0; transform: translate(-50%, 15px); }
}

/* Responsiveness */
@media (max-width: 1024px) {
  .slide-content {
    gap: 3rem;
  }
  .slide-title {
    font-size: 2.5rem;
  }
}

@media (max-width: 768px) {
  html, body {
    overflow-y: auto; /* Enable native scroll on mobile if things overflow */
  }
  .slider-container {
    scroll-snap-type: none;
    overflow-y: visible;
    height: auto;
  }
  .slide {
    height: auto;
    min-height: 100vh;
    padding: 6rem 1.5rem 3rem 1.5rem;
    scroll-snap-align: none;
  }
  .slide-content {
    grid-template-columns: 1fr !important;
    gap: 2.5rem;
  }
  .slide:nth-child(even) .text-panel {
    order: 1;
  }
  .slide:nth-child(even) .image-panel {
    order: 2;
  }
  .text-panel {
    text-align: center;
    align-items: center;
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .image-panel,
  .proposal-container {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .slide-title {
    font-size: 2.2rem;
  }
  .slide-text {
    font-size: 1.05rem;
    line-height: 1.7;
  }
  .card-3d-wrapper {
    max-width: 320px;
  }
  .destination-cards {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
  .dest-card {
    padding: 1.5rem;
  }
  .nav-dots {
    display: none; /* Hide dots on mobile */
  }
  .scroll-indicator {
    display: none;
  }
  .modal-card {
    padding: 2.5rem 1.5rem;
  }
}