:root {
  --bg1: #1b0028;
  --bg2: #ff4b8b;
  --bg3: #ffd1e8;
  --accent: #ff9ac4;
  --text-main: #ffe9f5;
  --text-soft: #f9e7f3;
  --glass: rgba(255, 255, 255, 0.08);
  --border-glass: rgba(255, 255, 255, 0.25);
}

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

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Helvetica Neue", Arial, sans-serif;
  color: var(--text-main);
  background: radial-gradient(circle at top, var(--bg2), var(--bg1) 55%);
  overflow-x: hidden;
  scroll-snap-type: y mandatory;
}

/* Background gradient overlay */
.background-gradient {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.08), transparent 55%),
    radial-gradient(circle at 80% 0%, rgba(255, 0, 128, 0.25), transparent 60%),
    radial-gradient(circle at 0% 100%, rgba(255, 200, 255, 0.2), transparent 60%);
  mix-blend-mode: screen;
  pointer-events: none;
  z-index: -2;
}

/* Floating particles */
.particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.5) 0, transparent 55%),
    radial-gradient(circle, rgba(255,255,255,0.4) 0, transparent 55%),
    radial-gradient(circle, rgba(255,255,255,0.3) 0, transparent 55%);
  background-size: 4px 4px, 3px 3px, 2px 2px;
  background-position:
    10% 20%,
    70% 40%,
    30% 80%;
  opacity: 0.4;
  animation: floatParticles 18s linear infinite alternate;
  z-index: -1;
}

@keyframes floatParticles {
  0% {
    background-position: 10% 20%, 70% 40%, 30% 80%;
  }
  100% {
    background-position: 20% 10%, 60% 50%, 40% 70%;
  }
}

/* Sections */
section {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 1.5rem;
}

.snap {
  scroll-snap-align: start;
}

/* HERO */
.hero-inner {
  text-align: center;
  max-width: 480px;
  animation: fadeInUp 1.2s ease-out both;
}

.heart-frame {
  width: min(260px, 60vw);
  height: min(260px, 60vw);
  overflow: hidden;
  /* box-shadow: */
    /* 0 0 40px rgba(255, 0, 128, 0.6), */
    /* 0 0 80px rgba(255, 0, 128, 0.4); */
  transform-origin: center;
  /* animation: pulseHeart 2.8s ease-in-out infinite; */
  border-radius: 32px;
  position: relative;
}

.heart-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(0.9);
  filter: saturate(1.2) contrast(1.05);
  clip-path: path("M 130 230 C -40 120 60 -20 130 60 C 200 -20 300 120 130 230 Z");
}

.heart-frame .heart-border {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  display: block;
  z-index: 2;
}

.hero h1 {
  margin-top: 30px;
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  color: #ffffff;
  letter-spacing: 0.06em;
  text-shadow: 0 0 18px rgba(0, 0, 0, 0.6);
}

.subtitle {
  margin-top: 0.75rem;
  font-size: 1rem;
  color: var(--text-soft);
  opacity: 0.9;
}

/* Scroll indicator */
.scroll-indicator {
  margin-top: 2.5rem;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-soft);
  opacity: 0.85;
}

.scroll-indicator span {
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

.mouse {
  width: 26px;
  height: 42px;
  border-radius: 16px;
  border: 2px solid rgba(255, 255, 255, 0.7);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 6px;
  position: relative;
  overflow: hidden;
}

.wheel {
  width: 4px;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  animation: wheelScroll 1.4s ease-in-out infinite;
}

@keyframes wheelScroll {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(12px); opacity: 0; }
}

/* PARALLAX SECTION */
.parallax-section {
  /* allow layers to extend outside the section so parallax feels natural */
  /* overflow: visible; */
  padding: 1rem 1.5rem
}

.parallax-container {
  position: relative;
  width: 100%;
  max-width: 1100px;
  height: 100vh;
  perspective: 1200px;
}

/* allow visual overflow inside the container while preventing page scroll */
.parallax-container {
  overflow: visible;
  padding-inline: 5vw;
}

.layer {
  position: absolute;
  width: min(320px, 60vw);
  height: min(320px, 60vw);
  overflow: hidden;
  border-radius: 24px;
    box-shadow:
      0 18px 40px rgba(0, 0, 0, 0.45),
      0 0 40px rgba(255, 0, 128, 0.35);
    border: 5px solid var(--accent);
    border-radius: 24px;
  transform-style: preserve-3d;
  transition: transform 0.2s ease-out;
  will-change: transform;
  backface-visibility: hidden;
  z-index: 10;
}

.layer img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.15) contrast(1.05);
}

/* Depth classes for subtle 3D scaling */
.depth-1 { transform: translateZ(120px) scale(1.05); }
.depth-2 { transform: translateZ(80px) scale(1.03); }
.depth-3 { transform: translateZ(40px) scale(1.02); }

/* Positioning layers */
  .layer1 {
    top: 12vh;
    left: 8vw;
    border: 5px solid var(--accent);
    border-radius: 24px;
  }
.layer2 { top: 30vh; right: 5vw; }
.layer3 { top: 60vh; left: 18vw; }


/* Floating text snippets */
.floating-text {
  position: absolute;
  max-width: 220px;
  font-size: 0.95rem;
  color: var(--text-soft);
  background: linear-gradient(135deg, rgba(255,255,255,0.12), rgba(255,255,255,0.02));
  border-radius: 999px;
  padding: 0.6rem 1.1rem;
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255,255,255,0.25);
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
  animation: floatSoft 8s ease-in-out infinite alternate;
  z-index: 1000;
}

.t1 { top: 15vh; right: 30vw; }
.t2 { top: 45vh; left: 30vw; animation-delay: 1.5s; }
.t3 { top: 70vh; right: 18vw; animation-delay: 3s; }

@keyframes floatSoft {
  0% { transform: translateY(0px) translateX(0px); opacity: 0.9; }
  100% { transform: translateY(-10px) translateX(4px); opacity: 1; }
}

/* LETTER SECTION */
.letter-section {
  padding: 4rem 1.5rem;
}

.letter-card {
  max-width: 640px;
  background: radial-gradient(circle at top left, rgba(255,255,255,0.18), rgba(255,255,255,0.04));
  border-radius: 28px;
  padding: 2.5rem 2.2rem;
  border: 1px solid var(--border-glass);
  box-shadow:
    0 24px 60px rgba(0, 0, 0, 0.6),
    0 0 60px rgba(255, 0, 128, 0.35);
  backdrop-filter: blur(24px);
  transform-origin: center;
  opacity: 0;
  transform: translateY(40px) scale(0.98);
  transition: opacity 0.9s ease-out, transform 0.9s ease-out;
}

.letter-card.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.letter-card h2 {
  margin-top: 0;
  font-size: clamp(1.8rem, 3vw, 2.2rem);
  margin-bottom: 1.2rem;
  color: #ffffff;
}

.letter-card p {
  line-height: 1.7;
  font-size: 1rem;
  color: var(--text-soft);
  margin-bottom: 1rem;
}

.signature {
  margin-top: 1.5rem;
  font-style: italic;
}

.signature span {
  font-size: 1.1rem;
  color: var(--accent);
}

/* OUTRO SECTION */
.outro-inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.8rem;
}

.big-heart {
  width: min(220px, 50vw);
  height: min(220px, 50vw);
  position: relative;
  filter: drop-shadow(0 0 40px rgba(255, 0, 128, 0.7));
}

.big-heart::before,
.big-heart::after {
  content: "";
  position: absolute;
  width: 50%;
  height: 80%;
  background: radial-gradient(circle at 30% 30%, #fff, #ff4b8b);
  border-radius: 50% 50% 0 0;
  top: 0;
}

.big-heart::before {
  left: 0;
  transform: rotate(-45deg) translateX(18%);
}

.big-heart::after {
  right: 0;
  transform: rotate(45deg) translateX(-18%);
}

/* Final outro photo styling */
.outro-frame {
  display: inline-block;
  position: relative;
  /* clip-path: path("M 130 230 C -40 120 60 -20 130 60 C 200 -20 300 120 130 230 Z"); */
  filter: drop-shadow(0 0 140px rgba(255, 0, 128, 0.7));
  /* box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45), 0 0 40px rgba(255, 0, 128, 0.35); */
  overflow: hidden;
  transition: transform 320ms ease, filter 320ms ease;
  will-change: transform;
  transform-origin: center;
  animation: pulseHeart 2.5s ease-in-out infinite;
  /* keep original image size by default; constrained only by viewport */
  max-width: 100vw;
}

.outro-frame:hover {
  transform: scale(1.03);
  filter: drop-shadow(0 0 60px rgba(255, 0, 128, 0.8));
}

.outro-photo {
  display: block;
  width: 350px;
  height: auto;
  max-width: none;
  object-fit: cover;
  object-position: var(--outro-focus, center);
}

.outro-text {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  color: var(--text-main);
  text-shadow: 0 0 18px rgba(0, 0, 0, 0.7);
}

/* Animations */
@keyframes pulseHeart {
  0% { transform: scale(1); }
  50% { transform: scale(1.20); }
  100% { transform: scale(1); }
}

@keyframes fadeInUp {
  0% { opacity: 0; transform: translateY(30px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* Desktop: constrain parallax visuals to avoid overflowing the page */
@media (min-width: 769px) {
  .parallax-section,
  .parallax-container {
    overflow: hidden;
  }

  /* Slightly narrower layers on wide screens to prevent edge overflow */
  .layer {
    width: min(320px, 26vw);
    height: min(320px, 26vw);
  }
}

/* Audio toggle button */
.audio-toggle {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 99999;
  width: 52px;
  height: 52px;
  border-radius: 999px;
  border: none;
  background: linear-gradient(180deg, var(--accent), #ff6aa0);
  color: white;
  font-size: 20px;
  display: grid;
  place-items: center;
  box-shadow: 0 12px 30px rgba(0,0,0,0.45), 0 0 30px rgba(255, 0, 128, 0.25);
  cursor: pointer;
}

.audio-toggle.playing {
  animation: pulseHeart 2.8s ease-in-out infinite;
}

/* Responsive tweaks */
@media (max-width: 768px) {
  .layer {
    width: 65vw;
    height: 65vw;
  }

  .layer1 { top: 6vh; left: 8vw; }
  .layer2 { top: 32vh; right: 6vw; }
  .layer3 { top: 58vh; left: 12vw; }
  .layer4 { top: 78vh; right: 10vw; }
  .layer5 { top: 42vh; left: 50%; transform: translateX(-50%) translateZ(-40px); }

  .floating-text {
    max-width: 60vw;
  }
}