:root {
  --bg-deep: #040824;
  --bg-darker: #010312;
  --pink-main: #f260c4;
  --pink-soft: #f9a4df;
  --white-soft: #f9f8ff;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  min-height: 100%;
}

body {
  overflow: hidden;
  font-family: "Space Grotesk", sans-serif;
  background: #010313;
  color: var(--white-soft);
}

.app-shell {
  width: 100vw;
  height: 100vh;
  position: relative;
}

.sound-toggle {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 20;
  border: 1px solid rgba(255, 255, 255, 0.26);
  background: rgba(8, 11, 36, 0.7);
  color: #ffffff;
  border-radius: 999px;
  padding: 8px 12px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  cursor: pointer;
}

.sound-toggle.on {
  background: rgba(242, 96, 196, 0.2);
  border-color: rgba(250, 160, 226, 0.7);
}

.scene {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 700ms ease, filter 700ms ease;
  filter: blur(2px) saturate(0.96);
}

.scene.active {
  opacity: 1;
  pointer-events: auto;
  filter: blur(0) saturate(1);
}

.scene-matrix {
  background: linear-gradient(180deg, #13031f 0%, #060110 100%);
}

#rainCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.matrix-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(0, 0, 0, 0.05) 0%, rgba(0, 0, 0, 0.72) 100%);
}

.matrix-center {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: "Bebas Neue", sans-serif;
  letter-spacing: 0.08em;
  color: var(--pink-main);
  text-shadow: 0 0 15px rgba(242, 96, 196, 0.55);
  font-size: clamp(3rem, 18vw, 12rem);
  opacity: 0;
  transform: scale(0.78);
  transition: opacity 320ms ease, transform 320ms ease;
}

.matrix-center.show {
  opacity: 1;
  transform: scale(1);
}

.matrix-center.small {
  font-size: clamp(2.2rem, 12vw, 8rem);
}

.matrix-heart {
  width: clamp(70px, 14vw, 140px);
  aspect-ratio: 1;
  background: #f25f8d;
  transform: rotate(45deg) scale(1);
  border-radius: 8px;
  animation: beat 900ms ease-in-out infinite;
}

.matrix-heart::before,
.matrix-heart::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: #f25f8d;
}

.matrix-heart::before {
  left: -50%;
}

.matrix-heart::after {
  top: -50%;
}

@keyframes beat {
  0%,
  100% {
    transform: rotate(45deg) scale(0.95);
  }
  50% {
    transform: rotate(45deg) scale(1.15);
  }
}

.scene-story {
  overflow: hidden;
  background: radial-gradient(circle at 30% 12%, #0a174c 0%, var(--bg-deep) 34%, var(--bg-darker) 100%);
  --mx: 0px;
  --my: 0px;
}

.scene-story.story-cool {
  animation: coolScenePulse 5.2s ease-in-out infinite;
}

@keyframes coolScenePulse {
  0%,
  100% {
    filter: saturate(1) brightness(1);
  }
  50% {
    filter: saturate(1.08) brightness(1.05);
  }
}

.scene-message {
  overflow: hidden;
  background: radial-gradient(circle at 30% 12%, #0a174c 0%, var(--bg-deep) 34%, var(--bg-darker) 100%);
  display: grid;
  place-items: center;
}

.scene-message::before,
.scene-message::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.95) 1px, transparent 1.5px),
    radial-gradient(circle, rgba(255, 255, 255, 0.6) 1px, transparent 1.5px),
    radial-gradient(circle, rgba(242, 96, 196, 0.35) 1.3px, transparent 2px);
  background-size: 130px 130px, 170px 170px, 240px 240px;
  background-position: 0 0, 50px 70px, 80px 120px;
  animation: starsMove 40s linear infinite;
}

.scene-message::after {
  opacity: 0.35;
  animation-duration: 70s;
  transform: scale(1.14);
}

.message-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 28%, rgba(255, 141, 216, 0.08) 0%, rgba(255, 141, 216, 0) 42%),
    radial-gradient(circle at 80% 18%, rgba(166, 206, 255, 0.08) 0%, rgba(166, 206, 255, 0) 38%);
}

.message-box {
  position: relative;
  z-index: 2;
  width: min(88vw, 760px);
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.03) 100%);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.08) inset,
    0 20px 55px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
  animation: messageFloat 4s ease-in-out infinite;
}

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

.message-title {
  margin: 0 0 18px;
  text-align: center;
  font-family: "Bebas Neue", sans-serif;
  letter-spacing: 0.1em;
  font-size: clamp(2rem, 7vw, 3.8rem);
  color: #f58cd8;
  text-shadow: 0 0 16px rgba(245, 140, 216, 0.38);
  opacity: 0;
  transform: translateY(10px) scale(0.95);
}

.message-line {
  margin: 10px 0;
  text-align: center;
  font-size: clamp(1rem, 2.5vw, 1.45rem);
  letter-spacing: 0.02em;
  color: rgba(247, 245, 255, 0.95);
  opacity: 0;
  transform: translateY(10px);
}

.scene-message.show .message-title,
.scene-message.show .message-line {
  animation: messageReveal 620ms ease forwards;
}

.scene-message.show .message-line:nth-of-type(1) {
  animation-delay: 220ms;
}

.scene-message.show .message-line:nth-of-type(2) {
  animation-delay: 420ms;
}

.scene-message.show .message-line:nth-of-type(3) {
  animation-delay: 620ms;
}

@keyframes messageReveal {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.domain-badge {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  font-size: 0.65rem;
  letter-spacing: 0.03em;
  color: rgba(255, 255, 255, 0.85);
  z-index: 5;
}

.space-layer {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.95) 1px, transparent 1.5px),
    radial-gradient(circle, rgba(255, 255, 255, 0.6) 1px, transparent 1.5px),
    radial-gradient(circle, rgba(242, 96, 196, 0.35) 1.3px, transparent 2px);
  background-size: 130px 130px, 170px 170px, 240px 240px;
  background-position: 0 0, 50px 70px, 80px 120px;
  animation: starsMove 40s linear infinite;
  transform: translate3d(calc(var(--mx) * -0.02), calc(var(--my) * -0.02), 0);
  transition: transform 240ms ease-out;
}

.space-layer-far {
  opacity: 0.38;
  animation-duration: 75s;
  transform: scale(1.15) translate3d(calc(var(--mx) * -0.045), calc(var(--my) * -0.045), 0);
}

.ambient-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
  transform: translate3d(calc(var(--mx) * 0.02), calc(var(--my) * 0.02), 0);
  transition: transform 260ms ease-out;
}

.ambient-heart,
.ambient-shape {
  position: absolute;
  opacity: 0;
  will-change: transform, opacity;
  contain: layout style paint;
}

.ambient-heart {
  width: var(--s, 12px);
  height: var(--s, 12px);
  background: rgba(255, 102, 178, 0.95);
  border-radius: 3px;
  transform: rotate(45deg);
  filter: drop-shadow(0 0 10px rgba(255, 122, 196, 0.7));
  animation: ambientFloat var(--d, 11s) linear infinite;
  animation-delay: var(--delay, 0s);
}

.ambient-heart::before,
.ambient-heart::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  background: rgba(255, 102, 178, 0.95);
  border-radius: 50%;
}

.ambient-heart::before {
  left: -50%;
}

.ambient-heart::after {
  top: -50%;
}

.ambient-shape {
  width: var(--w, 14px);
  height: var(--h, 14px);
  border: 1px solid rgba(174, 205, 255, 0.35);
  border-radius: 50%;
  animation: ambientDrift var(--d, 20s) ease-in-out infinite;
  animation-delay: var(--delay, 0s);
}

@keyframes ambientFloat {
  0% {
    opacity: 0;
    transform: translate3d(var(--x, 0), 108vh, 0) rotate(45deg) scale(0.6);
  }
  12% {
    opacity: 1;
  }
  88% {
    opacity: 0.55;
  }
  100% {
    opacity: 0;
    transform: translate3d(var(--x, 0), -12vh, 0) rotate(45deg) scale(1.08);
  }
}

@keyframes ambientDrift {
  0%,
  100% {
    opacity: 0;
    transform: translate3d(var(--x, 0), 95vh, 0) scale(0.7) rotate(0deg);
  }
  22% {
    opacity: 0.35;
  }
  80% {
    opacity: 0.2;
  }
  100% {
    transform: translate3d(calc(var(--x, 0) + 24px), -10vh, 0) scale(1.12) rotate(120deg);
  }
}

@keyframes starsMove {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(-140px);
  }
}

.character-block {
  position: absolute;
  top: 47%;
  left: 50%;
  transform: translate(-50%, -52%);
  text-align: center;
  transition: opacity 500ms ease;
  z-index: 4;
}

.character-block.hide {
  opacity: 0;
  pointer-events: none;
}

.character-gif {
  display: block;
  width: min(86vw, 340px);
  margin: 0 auto;
  mix-blend-mode: multiply;
  filter: contrast(1.05) saturate(1.06) drop-shadow(0 8px 18px rgba(0, 0, 0, 0.35));
  animation: floatChar 2.6s ease-in-out infinite, pulseGlow 3.4s ease-in-out infinite;
}

.character-note {
  margin: 8px 0 0;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(0.9rem, 1.9vw, 1.15rem);
}

.bottom-heart {
  margin: 8px 0 0;
  color: #e9517d;
  font-size: 0.95rem;
}

@keyframes floatChar {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes pulseGlow {
  0%,
  100% {
    filter: contrast(1.04) saturate(1.04) drop-shadow(0 8px 18px rgba(0, 0, 0, 0.32));
  }
  50% {
    filter: contrast(1.08) saturate(1.12) drop-shadow(0 10px 24px rgba(238, 128, 207, 0.3));
  }
}

.envelope-stage {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 500ms ease;
}

.envelope-stage.show {
  opacity: 1;
  pointer-events: auto;
}

.tap-instruction {
  display: none;
}

.envelope-wrap {
  position: relative;
  width: min(82vw, 300px);
  aspect-ratio: 6 / 4;
  transform: translateY(-30vh);
  opacity: 0;
  cursor: pointer;
  transition: transform 620ms cubic-bezier(0.2, 0.86, 0.22, 1.08), opacity 480ms ease;
}

.envelope-stage.show .envelope-wrap {
  transform: translateY(-6px);
  opacity: 1;
  animation: envelopeBreathe 2.8s ease-in-out infinite;
}

@keyframes envelopeBreathe {
  0%,
  100% {
    transform: translateY(-6px) scale(1);
  }
  50% {
    transform: translateY(-10px) scale(1.012);
  }
}

.envelope-body {
  position: absolute;
  inset: 0;
  border-radius: 8px;
  background: linear-gradient(180deg, #f8f6fd 0%, #ebe6fa 100%);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.35);
}

.envelope-body::before,
.envelope-body::after {
  content: "";
  position: absolute;
  inset: 0;
}

.envelope-body::before {
  clip-path: polygon(0 0, 50% 54%, 100% 0);
  background: #f0ebfb;
}

.envelope-body::after {
  clip-path: polygon(0 100%, 50% 53%, 100% 100%);
  background: #dfd8f6;
}

.envelope-flap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 52%;
  clip-path: polygon(0 0, 50% 100%, 100% 0);
  background: #d3c9f0;
  transform-origin: top;
  transform: rotateX(0deg);
  transition: transform 520ms ease;
  z-index: 3;
}

.envelope-wrap.open .envelope-flap {
  transform: rotateX(180deg);
}

.envelope-wrap.open .seal-heart {
  opacity: 0;
  transform: translate(-50%, -70%) rotate(45deg) scale(0.7);
  transition: transform 260ms ease, opacity 260ms ease;
}

.seal-heart {
  position: absolute;
  left: 50%;
  top: 42%;
  width: 34px;
  aspect-ratio: 1;
  background: #f15a8d;
  transform: translate(-50%, -50%) rotate(45deg);
  z-index: 4;
  border-radius: 5px;
}

.seal-heart::before,
.seal-heart::after {
  content: "";
  position: absolute;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #f15a8d;
}

.seal-heart::before {
  left: -17px;
}

.seal-heart::after {
  top: -17px;
}

.polaroid-area {
  position: absolute;
  top: 8%;
  left: 50%;
  transform: translateX(-50%);
  width: min(92vw, 560px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 380ms ease;
}

.polaroid-area.show {
  opacity: 1;
  pointer-events: auto;
}

.caption-chip {
  width: min(90vw, 520px);
  margin: 0 auto 10px;
  padding: 12px 18px;
  border-radius: 12px;
  background: #ffffff;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.28);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  position: relative;
  overflow: hidden;
  animation: chipNeonPulse 2.8s ease-in-out infinite;
}

@keyframes chipNeonPulse {
  0%,
  100% {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.28);
  }
  50% {
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35), 0 0 20px rgba(245, 126, 207, 0.32);
  }
}

.caption-chip::after {
  content: "";
  position: absolute;
  top: 0;
  left: -120%;
  width: 70%;
  height: 100%;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.65) 50%, rgba(255, 255, 255, 0) 100%);
  animation: chipShimmer 3.8s ease-in-out infinite;
}

@keyframes chipShimmer {
  0%,
  75%,
  100% {
    left: -120%;
  }
  35% {
    left: 135%;
  }
}

.slide-caption {
  margin: 0;
  text-align: center;
  font-family: Georgia, "Times New Roman", serif;
  font-style: italic;
  letter-spacing: 0.02em;
  font-size: clamp(0.9rem, 2.1vw, 1.1rem);
  color: #b07a8f;
  transition: transform 320ms ease, opacity 320ms ease;
}

.slide-caption.blast {
  animation: captionBlast 420ms ease;
}

@keyframes captionBlast {
  0% {
    transform: translateY(10px) scale(0.9);
    opacity: 0.2;
  }
  55% {
    transform: translateY(-4px) scale(1.06);
    opacity: 1;
  }
  100% {
    transform: translateY(0) scale(1);
  }
}

.chip-heart {
  color: #ea5f97;
  font-size: 0.8rem;
  line-height: 1;
}

.polaroid-stack {
  position: relative;
  height: min(72vh, 620px);
  perspective: 1100px;
}

.polaroid-card {
  position: relative;
  width: min(72vw, 300px);
  background: #ffffff;
  border-radius: 4px;
  padding: 10px;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.38);
  transform-style: preserve-3d;
  position: absolute;
  left: 50%;
  top: 36%;
  transform: translate(-50%, 130px) rotateX(26deg) rotate(var(--rot, 0deg)) scale(0.9);
  opacity: 0;
  transition: transform 620ms cubic-bezier(0.19, 0.88, 0.25, 1.08), opacity 620ms ease;
  will-change: transform, opacity;
  contain: layout style paint;
}

.polaroid-card.reveal {
  opacity: 1;
  transform: translate(-50%, 0) rotateX(0deg) rotate(var(--rot, 0deg)) scale(1);
  animation: polaroidPop 620ms cubic-bezier(0.14, 0.84, 0.21, 1.15);
}

@keyframes polaroidPop {
  0% {
    transform: translate(-50%, 110px) rotateX(26deg) rotate(var(--rot, 0deg)) scale(0.82);
    opacity: 0;
  }
  65% {
    transform: translate(-50%, -8px) rotateX(-2deg) rotate(var(--rot, 0deg)) scale(1.04);
    opacity: 1;
  }
  100% {
    transform: translate(-50%, 0) rotateX(0deg) rotate(var(--rot, 0deg)) scale(1);
  }
}

.memory-grid {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  background: #ffffff;
}

.memory-grid img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  display: block;
  background: #d9d9e0;
}

.polaroid-card.flip-out {
  transform: translate(-50%, 0) rotateY(78deg) rotate(var(--rot, 0deg)) scale(0.95);
  opacity: 0.24;
}

.polaroid-card.flip-in {
  animation: flipIn 360ms ease;
}

.polaroid-card.push-back {
  transform: translate(-50%, 34px) rotate(var(--rot, 0deg)) scale(0.94);
  opacity: 0.88;
}

@keyframes flipIn {
  0% {
    transform: translateY(0) rotateY(-70deg) scale(0.94);
    opacity: 0.3;
  }
  100% {
    transform: translateY(0) rotateY(0deg) scale(1);
    opacity: 1;
  }
}

.collage-stage {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 600ms ease;
}

.collage-stage.show {
  opacity: 1;
  pointer-events: auto;
}

.collage-title {
  margin: 0;
  position: absolute;
  top: 8%;
  left: 50%;
  transform: translateX(-50%);
  font-family: "Bebas Neue", sans-serif;
  letter-spacing: 0.08em;
  font-size: clamp(1.8rem, 5vw, 3rem);
  color: var(--pink-soft);
}

.heart-collage {
  position: absolute;
  left: 50%;
  top: 56%;
  transform: translate(-50%, -50%);
  width: min(90vw, 980px);
  height: min(76vh, 700px);
  contain: layout paint;
}

.heart-piece {
  position: absolute;
  width: var(--w, 64px);
  aspect-ratio: 4 / 5;
  background-size: cover;
  background-position: center;
  border: 2px solid #ffffff;
  border-radius: 10px;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.4) inset,
    0 0 9px rgba(248, 141, 215, 0.55),
    0 7px 14px rgba(0, 0, 0, 0.34);
  left: var(--tx);
  top: var(--ty);
  transform: translate(-50%, -50%) translate(var(--sx), var(--sy)) rotate(var(--sr));
  transition: transform 920ms cubic-bezier(0.2, 0.82, 0.2, 1.06), opacity 920ms ease;
  opacity: 0;
  overflow: hidden;
  will-change: transform, opacity;
  backface-visibility: hidden;
  contain: layout style paint;
}

.heart-piece.settle {
  opacity: 1;
  transform: translate(-50%, -50%) translate(0, 0) rotate(var(--fr));
}

.heart-piece::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.22) 0%, rgba(255, 255, 255, 0) 35%);
  pointer-events: none;
}

@media (max-width: 800px) {
  .tap-instruction {
    top: 14%;
  }

  .polaroid-area {
    top: 9%;
  }

  .caption-chip {
    width: min(92vw, 420px);
    padding: 11px 14px;
  }

  .slide-caption {
    font-size: clamp(0.88rem, 3.8vw, 1rem);
  }

  .character-gif {
    width: min(88vw, 300px);
  }

  .polaroid-card {
    width: min(80vw, 270px);
    top: 34%;
  }

  .polaroid-stack {
    height: min(70vh, 560px);
  }

  .collage-title {
    top: 6%;
  }

  .heart-collage {
    top: 58%;
    width: min(94vw, 700px);
    height: min(70vh, 560px);
  }

  .heart-piece {
    width: var(--w, 52px);
    border-radius: 8px;
  }
}