:root {
  color-scheme: light;
  --bg: #fff7f1;
  --bg-soft: #ffeaf0;
  --surface: #fffaf5;
  --surface-elevated: rgba(255, 250, 245, 0.94);
  --paper: #fff7e8;
  --paper-edge: #d69a71;
  --ink: #54262d;
  --ink-muted: #7a4b51;
  --accent: #c55268;
  --accent-strong: #9f2e42;
  --accent-soft: #ffd2dc;
  --sage: #6f8d80;
  --gold: #c89545;
  --cream-shadow: rgba(107, 49, 58, 0.18);
  --deep-shadow: rgba(70, 27, 35, 0.32);
  --focus: #155d5f;
  --radius: 8px;
  --font-body: "Nunito", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Lora", Georgia, serif;
  --font-script: "Dancing Script", "Brush Script MT", cursive;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 58%, var(--bg) 100%);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.3), transparent 34%);
  opacity: 0.35;
}

img,
svg {
  display: block;
  max-width: 100%;
}

[hidden] {
  display: none !important;
}

button,
a {
  font: inherit;
}

button {
  cursor: pointer;
}

.intro-scene,
.intro-scene *,
.primary-action,
.secondary-action {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.intro-scene,
.intro-scene * {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

a {
  color: inherit;
  text-decoration: none;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.icon {
  width: 1.15rem;
  height: 1.15rem;
  flex: 0 0 auto;
  fill: currentColor;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  min-height: 2.65rem;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: var(--radius);
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease,
    color 180ms ease;
}

.primary-action:hover,
.secondary-action:hover {
  transform: translateY(-1px);
}

.experience {
  position: relative;
  min-height: 100vh;
}

.intro-scene {
  position: relative;
  display: grid;
  min-height: 100svh;
  place-items: center;
  overflow: hidden;
  padding: 2rem 1rem;
}

.heart-field {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.heart-field span {
  position: absolute;
  bottom: -3rem;
  width: 0.85rem;
  height: 0.85rem;
  transform: rotate(-45deg);
  background: var(--accent);
  opacity: 0.52;
  animation: floatHeart 9s linear infinite;
}

.heart-field span::before,
.heart-field span::after {
  content: "";
  position: absolute;
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 50%;
  background: inherit;
}

.heart-field span::before {
  top: -0.43rem;
  left: 0;
}

.heart-field span::after {
  top: 0;
  left: 0.43rem;
}

.heart-field span:nth-child(1) { left: 9%; animation-delay: 0s; }
.heart-field span:nth-child(2) { left: 22%; animation-delay: 1.3s; animation-duration: 11s; }
.heart-field span:nth-child(3) { left: 36%; animation-delay: 3.1s; }
.heart-field span:nth-child(4) { left: 52%; animation-delay: 0.9s; animation-duration: 10s; }
.heart-field span:nth-child(5) { left: 64%; animation-delay: 2.4s; }
.heart-field span:nth-child(6) { left: 77%; animation-delay: 4.2s; animation-duration: 12s; }
.heart-field span:nth-child(7) { left: 86%; animation-delay: 1.8s; }
.heart-field span:nth-child(8) { left: 94%; animation-delay: 5.1s; animation-duration: 10.8s; }

.envelope-stage {
  position: relative;
  width: min(84vw, 31rem);
  aspect-ratio: 1.32;
  border-radius: var(--radius);
  cursor: pointer;
  perspective: 1300px;
}

.envelope-shadow {
  position: absolute;
  right: 10%;
  bottom: -0.95rem;
  left: 10%;
  height: 1.8rem;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(109, 53, 42, 0.24), rgba(109, 53, 42, 0.12) 52%, transparent 74%);
  filter: blur(16px);
  opacity: 0.28;
  transform: scaleX(0.88);
  transition:
    opacity 360ms ease,
    transform 360ms ease;
}

.experience[data-state="closed"] .envelope-shadow {
  animation: envelopeShadowPulse 3.8s ease-in-out infinite;
}

.experience[data-state="preview"] .envelope-shadow,
.experience[data-state="reading"] .envelope-shadow {
  bottom: -0.6rem;
  opacity: 0.18;
  transform: scaleX(0.74);
}

.envelope {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  animation: envelopeBreath 3.8s ease-in-out infinite;
}

.envelope-back,
.envelope-front,
.envelope-flap {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(153, 89, 54, 0.26);
  border-radius: var(--radius);
}

.envelope-back {
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.4), transparent 34%),
    linear-gradient(180deg, #f5d4b8, #e7ad86);
  box-shadow: 0 20px 70px var(--deep-shadow);
  transform-origin: bottom center;
  transition:
    transform 780ms cubic-bezier(0.18, 0.8, 0.2, 1),
    background 420ms ease,
    box-shadow 420ms ease;
}

.envelope-front {
  z-index: 2;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 0.7rem;
  padding: 1rem 0.75rem 1.15rem;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 237, 214, 0.68), transparent 45%),
    linear-gradient(180deg, #f8dcc2, #e7b28e);
  transform-origin: bottom center;
  transition:
    transform 780ms cubic-bezier(0.18, 0.8, 0.2, 1),
    clip-path 780ms cubic-bezier(0.18, 0.8, 0.2, 1),
    background 420ms ease,
    box-shadow 420ms ease;
}

.envelope-front::after {
  content: none;
}

.envelope-front::before {
  content: none;
}

.envelope-flap {
  z-index: 4;
  display: block;
  inset: 0;
  height: 100%;
  padding-top: 0;
  transform-origin: top center;
  transform-style: preserve-3d;
  border: 0;
  clip-path: none;
  background: transparent;
  box-shadow: none;
}

.envelope-flap::before,
.envelope-flap::after {
  content: "";
  position: absolute;
  border: 1px solid rgba(153, 89, 54, 0.26);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(226, 164, 123, 0.94), rgba(255, 245, 231, 0.78)),
    url("papel.svg");
}

.envelope-flap::before {
  inset: 0;
  clip-path: polygon(0 0, 100% 0, 50% 58%);
  box-shadow: 0 18px 28px rgba(121, 60, 45, 0.18);
  opacity: 1;
  transition: opacity 180ms ease;
}

.envelope-flap::after {
  top: 35%;
  right: 0;
  left: 0;
  height: 60%;
  clip-path: polygon(0 0, 100% 0, 50% 70%);
  box-shadow: 0 8px 16px rgba(121, 60, 45, 0.12);
  backface-visibility: visible;
  opacity: 0;
  transform: rotateX(0deg);
  transform-origin: top center;
  transition:
    opacity 80ms ease,
    transform 1250ms cubic-bezier(0.2, 0.72, 0.22, 1),
    box-shadow 620ms ease;
  will-change: transform;
}

.flap-message {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  display: block;
  width: min(58%, 15rem);
  color: #6c3330;
  font-family: var(--font-script);
  font-size: clamp(1.55rem, 6vw, 2.2rem);
  font-weight: 700;
  line-height: 1.05;
  text-align: center;
  text-shadow: 0 1px 0 rgba(255, 245, 230, 0.7);
  opacity: 0;
  transform: translate(-50%, -50%);
  transition:
    opacity 320ms ease 980ms,
    transform 320ms ease 980ms;
}

.section-kicker {
  margin: 0 0 0.45rem;
  color: var(--sage);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.seal-button {
  position: absolute;
  z-index: 6;
  top: 58%;
  left: 50%;
  width: clamp(3.85rem, 16vw, 5rem);
  height: clamp(3.85rem, 16vw, 5rem);
  transform: translate(-50%, -50%);
  border: 0;
  background: transparent;
  color: var(--accent-strong);
  cursor: pointer;
  filter: drop-shadow(0 10px 20px rgba(108, 42, 51, 0.28));
  isolation: isolate;
}

.seal-button::before {
  content: "";
  position: absolute;
  z-index: 0;
  inset: -0.35rem;
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(255, 242, 198, 0.82) 0 24%, rgba(255, 212, 158, 0.24) 46%, transparent 70%);
  filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transform: scale(0.9);
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.seal-full,
.seal-fragment {
  position: absolute;
  z-index: 1;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  will-change: transform, opacity;
}

.seal-full {
  animation: pulseSeal 2.4s cubic-bezier(0.45, 0, 0.25, 1) infinite;
  transition:
    opacity 520ms ease,
    transform 520ms cubic-bezier(0.18, 0.72, 0.24, 1),
    filter 180ms ease;
}

.experience[data-state="closed"] .envelope-stage:hover .seal-button::before,
.experience[data-state="closed"] .envelope-stage:focus-visible .seal-button::before,
.experience[data-state="closed"] .envelope-stage:active .seal-button::before,
.experience[data-state="closed"] .seal-button:hover::before,
.experience[data-state="closed"] .seal-button:focus-visible::before,
.experience[data-state="closed"] .seal-button:active::before {
  opacity: 0.48;
  transform: scale(1.03);
}

.experience[data-state="closed"] .envelope-stage:active .seal-button::before,
.experience[data-state="closed"] .seal-button:active::before {
  opacity: 0.62;
  transform: scale(0.96);
}

.experience[data-state="closed"] .envelope-stage:hover .seal-full,
.experience[data-state="closed"] .envelope-stage:focus-visible .seal-full,
.experience[data-state="closed"] .seal-button:hover .seal-full,
.experience[data-state="closed"] .seal-button:focus-visible .seal-full {
  filter:
    drop-shadow(0 0 9px rgba(255, 235, 184, 0.58))
    drop-shadow(0 0 18px rgba(197, 82, 104, 0.24));
}

.seal-fragment {
  opacity: 0;
  background-image: url("brasao.png");
  background-size: 200% 200%;
  background-repeat: no-repeat;
}

.seal-fragment:nth-of-type(1) {
  clip-path: polygon(0 0, 52% 0, 48% 52%, 0 48%);
  background-position: 0 0;
}

.seal-fragment:nth-of-type(2) {
  clip-path: polygon(48% 0, 100% 0, 100% 48%, 52% 52%);
  background-position: 100% 0;
}

.seal-fragment:nth-of-type(3) {
  clip-path: polygon(0 48%, 48% 52%, 52% 100%, 0 100%);
  background-position: 0 100%;
}

.seal-fragment:nth-of-type(4) {
  clip-path: polygon(52% 52%, 100% 48%, 100% 100%, 48% 100%);
  background-position: 100% 100%;
}

.experience[data-state="preview"] .envelope,
.experience[data-state="reading"] .envelope {
  animation: none;
}

.experience[data-state="preview"] .envelope-front,
.experience[data-state="reading"] .envelope-front {
  inset: 35% 0 0;
  clip-path: polygon(0 0, 50% 20%, 100% 0, 100% 100%, 0 100%);
  transform: none;
  background:
    linear-gradient(180deg, rgba(244, 194, 153, 0.76), rgba(224, 153, 104, 0.92)),
    linear-gradient(180deg, #f2c39b, #df9c6d);
  box-shadow:
    inset 0 12px 26px rgba(111, 54, 38, 0.12),
    inset 0 -10px 18px rgba(255, 236, 210, 0.18);
}

.experience[data-state="preview"] .envelope-front::before,
.experience[data-state="reading"] .envelope-front::before {
  position: absolute;
  z-index: 3;
  top: 14%;
  left: 50%;
  font-family: Georgia, serif;
  font-size: clamp(4.2rem, 14vw, 5.65rem);
  line-height: 1;
  text-shadow: none;
  opacity: 0;
  filter: drop-shadow(0 1px 0 rgba(255, 238, 214, 0.65));
  transform: translate(-50%, 0);
  animation: pocketHeartAppear 680ms ease 760ms forwards;
}

.experience[data-state="preview"] .envelope-front::before,
.experience[data-state="reading"] .envelope-front::before {
  content: "♥";
  color: transparent;
  background: linear-gradient(90deg, #447fc0 0 50%, #c4374b 50% 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.experience[data-state="preview"] .envelope-front::after,
.experience[data-state="reading"] .envelope-front::after {
  content: none;
}

.experience[data-state="preview"] .envelope-back,
.experience[data-state="reading"] .envelope-back {
  inset: 35% 0 0;
  transform: none;
  background:
    linear-gradient(180deg, rgba(242, 196, 160, 0.86), rgba(223, 154, 107, 0.96)),
    linear-gradient(180deg, #f0c09a, #db9768);
  box-shadow: 0 14px 46px rgba(107, 49, 58, 0.2);
}

.experience[data-state="preview"] .envelope-flap::before,
.experience[data-state="reading"] .envelope-flap::before {
  opacity: 0;
  transform: translateY(35%);
  transition: opacity 180ms ease, transform 0s;
}

.experience[data-state="preview"] .envelope-flap::after,
.experience[data-state="reading"] .envelope-flap::after {
  opacity: 1;
  transform: rotateX(180deg);
}

.experience[data-state="preview"] .flap-message,
.experience[data-state="reading"] .flap-message {
  top: 20%;
  width: min(72%, 18rem);
  font-size: clamp(1.35rem, 5.1vw, 1.95rem);
  opacity: 1;
  transform: translate(-50%, -50%);
}

.experience[data-state="preview"] .seal-full,
.experience[data-state="reading"] .seal-full {
  animation: none;
  transform: scale(0.78);
  opacity: 0;
}

.experience[data-state="preview"] .seal-fragment,
.experience[data-state="reading"] .seal-fragment {
  animation: breakSeal 1280ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.experience[data-state="preview"] .seal-fragment:nth-of-type(2),
.experience[data-state="reading"] .seal-fragment:nth-of-type(2) {
  animation-name: breakSealTwo;
  animation-delay: 45ms;
}

.experience[data-state="preview"] .seal-fragment:nth-of-type(3),
.experience[data-state="reading"] .seal-fragment:nth-of-type(3) {
  animation-name: breakSealThree;
  animation-delay: 85ms;
}

.experience[data-state="preview"] .seal-fragment:nth-of-type(4),
.experience[data-state="reading"] .seal-fragment:nth-of-type(4) {
  animation-name: breakSealFour;
  animation-delay: 125ms;
}

.letter-section,
.pixel-section {
  position: relative;
  padding: 1rem;
}

.letter-section[hidden],
.pixel-section[hidden] {
  display: none;
}

.experience[data-state="preview"] .letter-section {
  margin-top: 0;
  padding-top: 0.25rem;
  padding-bottom: 2.25rem;
}

.experience[data-state="preview"] .intro-scene {
  min-height: auto;
  overflow: visible;
  padding: 8.5rem 1rem 0.75rem;
}

.experience[data-state="preview"] .envelope-stage {
  width: min(82vw, 25rem);
  aspect-ratio: 1.25;
}

.experience[data-state="reading"] .intro-scene {
  display: none;
}

.experience[data-state="reading"] .letter-section {
  display: grid;
  min-height: 100svh;
  overflow: hidden;
  place-items: center;
  padding: 0.65rem 0.5rem;
}

.paper-card {
  position: relative;
  overflow: hidden;
  width: min(100%, 46rem);
  margin: 0 auto;
  padding: 1.05rem;
  border: 1px solid rgba(191, 125, 82, 0.58);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 18% 16%, rgba(167, 105, 65, 0.1) 0 1px, transparent 1.6px),
    radial-gradient(circle at 74% 38%, rgba(121, 60, 45, 0.06) 0 1px, transparent 1.5px),
    repeating-linear-gradient(92deg, rgba(150, 94, 55, 0.026) 0 1px, transparent 1px 12px),
    linear-gradient(180deg, #fff8e9 0%, #fff0d8 100%);
  background-size: 22px 22px, 28px 28px, 100% 100%, 100% 100%;
  box-shadow:
    0 14px 34px rgba(107, 49, 58, 0.14),
    inset 0 0 0 1px rgba(255, 250, 238, 0.62),
    inset 0 0 42px rgba(196, 128, 83, 0.12);
  color: var(--ink);
}

.paper-hearts {
  position: absolute;
  z-index: 0;
  inset: 0;
  opacity: 0.92;
  pointer-events: none;
}

.paper-hearts span {
  position: absolute;
  width: 0.9rem;
  height: 0.9rem;
  transform: rotate(-45deg);
  background: rgba(197, 82, 104, 0.28);
}

.paper-hearts span::before,
.paper-hearts span::after {
  content: "";
  position: absolute;
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 50%;
  background: inherit;
}

.paper-hearts span::before {
  top: -0.45rem;
  left: 0;
}

.paper-hearts span::after {
  top: 0;
  left: 0.45rem;
}

.paper-hearts span:nth-child(1) {
  top: 0.85rem;
  left: 0.8rem;
  transform: rotate(-45deg) scale(0.75);
}

.paper-hearts span:nth-child(2) {
  top: 1rem;
  right: 0.9rem;
  transform: rotate(-45deg) scale(0.68);
  background: rgba(200, 149, 69, 0.3);
}

.paper-hearts span:nth-child(3) {
  top: 45%;
  left: 0.48rem;
  transform: rotate(-45deg) scale(0.62);
  background: rgba(216, 117, 138, 0.26);
}

.paper-hearts span:nth-child(4) {
  top: 49%;
  right: 0.5rem;
  transform: rotate(-45deg) scale(0.62);
  background: rgba(111, 141, 128, 0.27);
}

.paper-hearts span:nth-child(5) {
  bottom: 0.8rem;
  left: 1rem;
  transform: rotate(-45deg) scale(0.7);
  background: rgba(200, 149, 69, 0.26);
}

.paper-hearts span:nth-child(6) {
  right: 1.05rem;
  bottom: 0.95rem;
  transform: rotate(-45deg) scale(0.78);
}

.paper-hearts span:nth-child(7) {
  top: 18%;
  left: 13%;
  transform: rotate(-45deg) scale(0.66);
  background: rgba(197, 82, 104, 0.2);
}

.paper-hearts span:nth-child(8) {
  top: 22%;
  right: 15%;
  transform: rotate(-45deg) scale(0.6);
  background: rgba(200, 149, 69, 0.21);
}

.paper-hearts span:nth-child(9) {
  top: 35%;
  left: 8%;
  transform: rotate(-45deg) scale(0.58);
  background: rgba(216, 117, 138, 0.2);
}

.paper-hearts span:nth-child(10) {
  top: 39%;
  right: 9%;
  transform: rotate(-45deg) scale(0.62);
  background: rgba(111, 141, 128, 0.2);
}

.paper-hearts span:nth-child(11) {
  right: 16%;
  bottom: 22%;
  transform: rotate(-45deg) scale(0.62);
  background: rgba(197, 82, 104, 0.2);
}

.paper-hearts span:nth-child(12) {
  bottom: 18%;
  left: 15%;
  transform: rotate(-45deg) scale(0.58);
  background: rgba(200, 149, 69, 0.2);
}

.paper-card h1,
.letter-scroll,
.letter-actions {
  position: relative;
  z-index: 1;
}

.paper-card h1 {
  margin: 0.35rem 0 0.85rem;
  color: var(--accent-strong);
  font-family: var(--font-script);
  font-size: clamp(2rem, 8vw, 2.4rem);
  line-height: 1.05;
  text-align: center;
}

.experience[data-state="reading"] .paper-card {
  display: flex;
  width: 100%;
  height: calc(100svh - 1.3rem);
  max-height: calc(100svh - 1.3rem);
  flex-direction: column;
  padding: 1.15rem 1rem 1.2rem;
}

.experience[data-state="reading"] .paper-card h1 {
  margin: 0.15rem 0 1rem;
  font-size: clamp(2.2rem, 9vw, 2.75rem);
}

.letter-scroll {
  max-height: 13.5rem;
  overflow: hidden;
  padding: 0.25rem 0.1rem 0;
  transition: max-height 260ms ease;
}

.experience[data-state="preview"] .paper-card::after {
  content: "";
  position: absolute;
  z-index: 2;
  right: 1rem;
  bottom: 5.4rem;
  left: 1rem;
  height: 4.8rem;
  pointer-events: none;
  background: linear-gradient(180deg, transparent, var(--paper));
}

.experience[data-state="reading"] .letter-scroll {
  flex: 1 1 auto;
  max-height: none;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0.25rem 0 0;
  -ms-overflow-style: none;
  scrollbar-gutter: auto;
  scrollbar-width: none;
}

.letter-scroll::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
  background: transparent;
}

.letter-scroll::-webkit-scrollbar-track,
.letter-scroll::-webkit-scrollbar-thumb,
.letter-scroll::-webkit-scrollbar-corner {
  display: none;
  background: transparent;
}

.letter-content {
  font-family: var(--font-script);
  font-size: clamp(1.45rem, 5vw, 1.72rem);
  line-height: 1.35;
}

.experience[data-state="reading"] .letter-content {
  font-size: clamp(1.55rem, 5.5vw, 1.85rem);
  line-height: 1.32;
}

.letter-content p {
  color: #822334;
  font-family: var(--font-script);
  font-size: inherit;
  line-height: inherit;
  margin: 0 0 1.05rem;
}

.letter-content p:first-child {
  color: #822334;
}

.letter-actions,
.art-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: center;
  margin-top: 1rem;
}

.experience[data-state="reading"] .letter-actions {
  display: none;
}

.primary-action,
.secondary-action {
  min-width: 9.5rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid transparent;
  text-align: center;
}

.primary-action {
  background: var(--accent-strong);
  color: #fffaf5;
  font-weight: 700;
  box-shadow: 0 12px 24px rgba(117, 35, 51, 0.2);
}

.secondary-action {
  border-color: rgba(197, 82, 104, 0.25);
  background: rgba(255, 255, 255, 0.38);
  color: var(--ink);
}

.secondary-action:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.secondary-action.is-disabled {
  pointer-events: none;
  opacity: 0.55;
}

.pixel-section {
  overflow: hidden;
  opacity: 0;
  transform: translateY(1.4rem);
  transition:
    opacity 520ms ease,
    transform 520ms ease;
}

.pixel-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.pixel-bg-hearts {
  position: absolute;
  z-index: 0;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.pixel-bg-hearts > span {
  position: absolute;
  filter: drop-shadow(0 8px 18px rgba(107, 49, 58, 0.12));
}

.pixel-bg-hearts .pixel-heart {
  --heart-base-scale: 1;
  --heart-anchor-x: 0.675rem;
  --heart-anchor-y: 0.28rem;
  width: 1.35rem;
  height: 1.35rem;
  background: rgba(197, 82, 104, 0.22);
  transform: translate(var(--heart-anchor-x), var(--heart-anchor-y)) scaleX(1) scaleY(1) rotate(-45deg) scale(var(--heart-base-scale));
  transform-origin: 0 100%;
  animation: pixelHeartBeat 3.55s infinite;
  isolation: isolate;
  will-change: transform;
}

.pixel-bg-hearts .pixel-heart::before,
.pixel-bg-hearts .pixel-heart::after {
  content: "";
  position: absolute;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  background: inherit;
}

.pixel-bg-hearts .pixel-heart::before {
  top: -0.675rem;
  left: 0;
}

.pixel-bg-hearts .pixel-heart::after {
  top: 0;
  left: 0.675rem;
}

.pixel-bg-hearts .pixel-heart-echo {
  position: absolute;
  z-index: -1;
  inset: 0;
  width: 1.35rem;
  height: 1.35rem;
  background: inherit;
  opacity: 0.46;
  transform: scale(1.16);
  transform-origin: 0 100%;
  animation: pixelHeartEchoNear 3.55s infinite;
  pointer-events: none;
  will-change: transform, opacity;
}

.pixel-bg-hearts .pixel-heart-echo::before,
.pixel-bg-hearts .pixel-heart-echo::after {
  content: "";
  position: absolute;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  background: inherit;
}

.pixel-bg-hearts .pixel-heart-echo::before {
  top: -0.675rem;
  left: 0;
}

.pixel-bg-hearts .pixel-heart-echo::after {
  top: 0;
  left: 0.675rem;
}

.pixel-bg-hearts .pixel-heart-echo + .pixel-heart-echo {
  opacity: 0.24;
  transform: scale(1.32);
  animation-name: pixelHeartEchoFar;
}

.pixel-bg-hearts .pixel-dino {
  width: 3.4rem;
  height: 3.4rem;
  background: rgba(197, 82, 104, 0.26);
  -webkit-mask: url("braqui.png") center / contain no-repeat;
  mask: url("braqui.png") center / contain no-repeat;
}

.pixel-bg-hearts > span:nth-child(1) {
  top: 13%;
  left: 9%;
  --heart-base-scale: 1.3;
  --heart-anchor-y: 0.566rem;
}

.pixel-bg-hearts > span:nth-child(2) {
  top: 18%;
  right: 10%;
  transform: rotate(8deg) scale(1.05);
  background: rgba(68, 127, 192, 0.25);
}

.pixel-bg-hearts > span:nth-child(3) {
  top: 24%;
  right: 18%;
  --heart-base-scale: 1.15;
  --heart-anchor-y: 0.423rem;
  background: rgba(216, 117, 138, 0.2);
}

.pixel-bg-hearts > span:nth-child(4) {
  top: 28%;
  left: 16%;
  transform: rotate(-7deg) scale(1.12);
  background: rgba(111, 141, 128, 0.26);
}

.pixel-bg-hearts > span:nth-child(5) {
  bottom: 19%;
  left: 13%;
  --heart-base-scale: 0.95;
  --heart-anchor-y: 0.232rem;
  background: rgba(197, 82, 104, 0.18);
}

.pixel-bg-hearts > span:nth-child(6) {
  right: 13%;
  bottom: 17%;
  transform: rotate(5deg) scale(0.98);
  background: rgba(200, 149, 69, 0.25);
}

.pixel-bg-hearts > span:nth-child(7) {
  top: 58%;
  right: 17%;
  --heart-base-scale: 0.86;
  --heart-anchor-y: 0.146rem;
  background: rgba(68, 127, 192, 0.16);
}

.pixel-bg-hearts > span:nth-child(8) {
  top: 62%;
  left: 9%;
  transform: rotate(-10deg) scale(0.92);
  background: rgba(196, 55, 75, 0.22);
}

.pixel-bg-hearts > span:nth-child(9) {
  top: 76%;
  left: 24%;
  --heart-base-scale: 0.9;
  --heart-anchor-y: 0.184rem;
  background: rgba(200, 149, 69, 0.2);
}

.pixel-bg-hearts > span:nth-child(10) {
  top: 28%;
  right: 35%;
  transform: rotate(12deg) scale(0.95);
  background: rgba(111, 141, 128, 0.22);
}

.pixel-bg-hearts > span:nth-child(11) {
  top: 86%;
  right: 8%;
  --heart-base-scale: 1.05;
  --heart-anchor-y: 0.327rem;
  background: rgba(197, 82, 104, 0.25);
}

.pixel-bg-hearts > span:nth-child(12) {
  top: 20%;
  left: 38%;
  transform: rotate(-5deg) scale(1.1);
  background: rgba(216, 117, 138, 0.18);
}

.pixel-bg-hearts > span:nth-child(13) {
  top: 38%;
  right: 34%;
  --heart-base-scale: 0.85;
  --heart-anchor-y: 0.137rem;
  background: rgba(68, 127, 192, 0.2);
}

.pixel-bg-hearts > span:nth-child(14) {
  top: 52%;
  left: 31%;
  transform: rotate(8deg) scale(0.9);
  background: rgba(196, 55, 75, 0.2);
}

.pixel-bg-hearts > span:nth-child(15) {
  bottom: 7%;
  left: 48%;
  --heart-base-scale: 0.75;
  --heart-anchor-y: 0.041rem;
  background: rgba(216, 117, 138, 0.15);
}

.pixel-bg-hearts > span:nth-child(16) {
  bottom: 9%;
  right: 45%;
  transform: rotate(-12deg) scale(0.8);
  background: rgba(111, 141, 128, 0.2);
}

.section-shell {
  position: relative;
  z-index: 1;
  width: min(100%, 68rem);
  margin: 0 auto;
  padding: 5rem 1rem 3rem;
  text-align: center;
}

.section-shell h2 {
  margin: 0 0 1rem;
  color: var(--accent-strong);
  font-family: var(--font-script);
  font-size: 2.35rem;
  line-height: 1.05;
}

.pixel-figure {
  display: grid;
  gap: 0.75rem;
  justify-items: center;
  margin: 0 auto;
}

.pixel-figure img {
  width: min(100%, 38rem);
  height: auto;
  image-rendering: pixelated;
  border: 1px solid rgba(197, 82, 104, 0.28);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 18px 50px var(--cream-shadow);
}

.pixel-figure figcaption {
  color: var(--ink-muted);
  font-size: 0.95rem;
}

.art-placeholder {
  display: grid;
  width: min(100%, 38rem);
  min-height: 18rem;
  place-items: center;
  gap: 0.35rem;
  padding: 2rem;
  border: 1px dashed rgba(197, 82, 104, 0.5);
  border-radius: var(--radius);
  background: var(--surface-elevated);
  color: var(--ink-muted);
}

.art-placeholder .icon {
  width: 2rem;
  height: 2rem;
  color: var(--accent);
}

.confetti-heart {
  position: fixed;
  z-index: 40;
  top: -2rem;
  width: var(--heart-size, 0.7rem);
  height: var(--heart-size, 0.7rem);
  transform: rotate(-45deg);
  background: var(--accent);
  pointer-events: none;
  animation: confettiFall var(--heart-duration, 2.8s) ease-in forwards;
  animation-delay: var(--heart-delay, 0s);
}

.confetti-heart.is-opening {
  z-index: 18;
  animation-name: openingHeartFall;
  opacity: 0.82;
}

.confetti-heart::before,
.confetti-heart::after {
  content: "";
  position: absolute;
  width: var(--heart-size, 0.7rem);
  height: var(--heart-size, 0.7rem);
  border-radius: 50%;
  background: inherit;
}

.confetti-heart::before {
  top: calc(var(--heart-size, 0.7rem) * -0.5);
  left: 0;
}

.confetti-heart::after {
  top: 0;
  left: calc(var(--heart-size, 0.7rem) * 0.5);
}

.toast {
  position: fixed;
  z-index: 50;
  right: 1rem;
  bottom: 1rem;
  max-width: min(24rem, calc(100vw - 2rem));
  padding: 0.8rem 0.95rem;
  border: 1px solid rgba(197, 82, 104, 0.25);
  border-radius: var(--radius);
  background: var(--surface-elevated);
  box-shadow: 0 16px 34px var(--cream-shadow);
  color: var(--ink);
  transform: translateY(1rem);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.toast.is-visible {
  transform: translateY(0);
  opacity: 1;
}

.noscript-letter {
  width: min(100% - 2rem, 48rem);
  margin: 6rem auto 2rem;
  padding: 1.25rem;
  border: 1px solid var(--paper-edge);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: 0 18px 44px var(--cream-shadow);
  font-family: var(--font-serif);
}

.noscript-letter img {
  width: 5rem;
  height: 5rem;
  margin: 0 auto 1rem;
  border-radius: 50%;
  object-fit: cover;
}

.noscript-letter h1 {
  color: var(--accent-strong);
  font-family: var(--font-script);
  font-size: 2.4rem;
  text-align: center;
}

html[data-motion="reduced"] *,
html[data-motion="reduced"] *::before,
html[data-motion="reduced"] *::after {
  scroll-behavior: auto !important;
  animation-duration: 1ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 1ms !important;
}

html[data-motion="reduced"] .heart-field,
html[data-motion="reduced"] .confetti-heart {
  display: none;
}

@keyframes envelopeBreath {
  0%, 100% { transform: translateY(0) rotateZ(-0.4deg); }
  50% { transform: translateY(-0.4rem) rotateZ(0.4deg); }
}

@keyframes envelopeShadowPulse {
  0%, 100% {
    opacity: 0.26;
    transform: scaleX(0.9);
  }

  50% {
    opacity: 0.36;
    transform: scaleX(1);
  }
}

@keyframes pocketHeartAppear {
  0% {
    opacity: 0;
    margin-top: 0.35rem;
  }

  100% {
    opacity: 0.95;
    margin-top: 0;
  }
}

@keyframes pulseSeal {
  0%, 100% { transform: scale(1); }
  45% { transform: scale(1.03); }
}

@keyframes pixelHeartBeat {
  0% {
    transform: translate(var(--heart-anchor-x), var(--heart-anchor-y)) scaleX(1) scaleY(1) rotate(-45deg) scale(var(--heart-base-scale));
    animation-timing-function: cubic-bezier(0.22, 0.72, 0.28, 1.12);
  }

  12.7% {
    transform: translate(var(--heart-anchor-x), var(--heart-anchor-y)) scaleX(1.06) scaleY(1.03) rotate(-45deg) scale(var(--heart-base-scale));
    animation-timing-function: cubic-bezier(0.65, 0, 0.35, 1);
  }

  40.8% {
    transform: translate(var(--heart-anchor-x), var(--heart-anchor-y)) scaleX(0.64) scaleY(0.64) rotate(-45deg) scale(var(--heart-base-scale));
    animation-timing-function: cubic-bezier(0.18, 0.88, 0.28, 1.26);
  }

  71.8% {
    transform: translate(var(--heart-anchor-x), var(--heart-anchor-y)) scaleX(1.05) scaleY(1.03) rotate(-45deg) scale(var(--heart-base-scale));
    animation-timing-function: cubic-bezier(0.22, 0.7, 0.3, 1);
  }

  86%, 100% {
    transform: translate(var(--heart-anchor-x), var(--heart-anchor-y)) scaleX(1) scaleY(1) rotate(-45deg) scale(var(--heart-base-scale));
  }
}

@keyframes pixelHeartEchoNear {
  0% {
    opacity: 0.46;
    transform: scale(1.16);
    animation-timing-function: cubic-bezier(0.22, 0.72, 0.28, 1.12);
  }

  12.7% {
    opacity: 0.5;
    transform: scale(1.19);
    animation-timing-function: cubic-bezier(0.65, 0, 0.35, 1);
  }

  40.8% {
    opacity: 0;
    transform: scale(0.96);
    animation-timing-function: cubic-bezier(0.18, 0.88, 0.28, 1.26);
  }

  71.8% {
    opacity: 0.52;
    transform: scale(1.21);
    animation-timing-function: cubic-bezier(0.22, 0.7, 0.3, 1);
  }

  86%, 100% {
    opacity: 0.46;
    transform: scale(1.16);
  }
}

@keyframes pixelHeartEchoFar {
  0% {
    opacity: 0.24;
    transform: scale(1.32);
    animation-timing-function: cubic-bezier(0.22, 0.72, 0.28, 1.12);
  }

  12.7% {
    opacity: 0.28;
    transform: scale(1.36);
    animation-timing-function: cubic-bezier(0.65, 0, 0.35, 1);
  }

  40.8% {
    opacity: 0;
    transform: scale(1);
    animation-timing-function: cubic-bezier(0.18, 0.88, 0.28, 1.26);
  }

  71.8% {
    opacity: 0.3;
    transform: scale(1.4);
    animation-timing-function: cubic-bezier(0.22, 0.7, 0.3, 1);
  }

  86%, 100% {
    opacity: 0.24;
    transform: scale(1.32);
  }
}

@keyframes floatHeart {
  0% {
    transform: translateY(0) rotate(-45deg) scale(0.82);
    opacity: 0;
  }
  15% { opacity: 0.5; }
  100% {
    transform: translateY(-112vh) rotate(-45deg) scale(1.12);
    opacity: 0;
  }
}

@keyframes breakSeal {
  0% { transform: translate(0, 0) rotate(0) scale(1); opacity: 1; }
  28% { transform: translate(-0.18rem, -0.12rem) rotate(-4deg) scale(1.04); opacity: 1; }
  68% { transform: translate(-0.82rem, -0.7rem) rotate(-15deg) scale(0.96); opacity: 0.82; }
  100% { transform: translate(-1.35rem, -1.08rem) rotate(-24deg) scale(0.86); opacity: 0; }
}

@keyframes breakSealTwo {
  0% { transform: translate(0, 0) rotate(0) scale(1); opacity: 1; }
  28% { transform: translate(0.18rem, -0.1rem) rotate(5deg) scale(1.04); opacity: 1; }
  68% { transform: translate(0.82rem, -0.64rem) rotate(17deg) scale(0.96); opacity: 0.82; }
  100% { transform: translate(1.3rem, -1.02rem) rotate(28deg) scale(0.86); opacity: 0; }
}

@keyframes breakSealThree {
  0% { transform: translate(0, 0) rotate(0) scale(1); opacity: 1; }
  28% { transform: translate(-0.12rem, 0.14rem) rotate(4deg) scale(1.04); opacity: 1; }
  68% { transform: translate(-0.72rem, 0.72rem) rotate(14deg) scale(0.96); opacity: 0.82; }
  100% { transform: translate(-1.18rem, 1.16rem) rotate(24deg) scale(0.86); opacity: 0; }
}

@keyframes breakSealFour {
  0% { transform: translate(0, 0) rotate(0) scale(1); opacity: 1; }
  28% { transform: translate(0.14rem, 0.14rem) rotate(-5deg) scale(1.04); opacity: 1; }
  68% { transform: translate(0.72rem, 0.72rem) rotate(-16deg) scale(0.96); opacity: 0.82; }
  100% { transform: translate(1.2rem, 1.14rem) rotate(-28deg) scale(0.86); opacity: 0; }
}

@keyframes confettiFall {
  0% {
    transform: translateY(-2rem) rotate(-45deg);
    opacity: 0;
  }
  12% { opacity: 0.9; }
  100% {
    transform: translateY(105vh) rotate(260deg);
    opacity: 0;
  }
}

@keyframes openingHeartFall {
  0% {
    transform: translate3d(0, -3rem, 0) rotate(-45deg) scale(0.72);
    opacity: 0;
  }

  12% {
    opacity: 0.88;
  }

  68% {
    opacity: 0.72;
  }

  100% {
    transform: translate3d(var(--heart-drift, 0), 92vh, 0) rotate(calc(var(--heart-spin, 240deg) - 45deg)) scale(1);
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }

  .heart-field,
  .confetti-heart {
    display: none;
  }
}

@media (min-width: 44rem) {
  .seal-button {
    width: 5.6rem;
    height: 5.6rem;
  }

  .paper-card {
    padding: 1.4rem;
  }

  .paper-card h1,
  .section-shell h2 {
    font-size: 3rem;
  }

  .letter-content {
    font-size: 1.8rem;
  }
}

@media (min-width: 58rem) {
  .experience[data-state="preview"] {
    display: grid;
    min-height: 100svh;
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: center;
    gap: 1rem;
    padding: 2rem 1.5rem;
  }

  .experience[data-state="preview"] .intro-scene {
    min-height: auto;
    padding: 0;
  }

  .experience[data-state="preview"] .letter-section {
    margin-top: 0;
    padding: 0;
  }

  .experience[data-state="reading"] .paper-card {
    display: block;
    width: min(82vw, 54rem);
    height: auto;
    max-height: none;
    padding: 1.4rem;
  }

  .experience[data-state="reading"] .paper-card h1 {
    margin: 0.35rem 0 0.85rem;
    font-size: 3rem;
  }

  .experience[data-state="reading"] .letter-section {
    display: grid;
    min-height: 100svh;
    place-items: center;
    padding: 1rem;
  }

  .experience[data-state="reading"] .letter-scroll {
    flex: initial;
    max-height: calc(100svh - 17rem);
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 0.35rem;
  }

  .experience[data-state="reading"] .letter-content {
    font-size: 1.8rem;
    line-height: 1.35;
  }
}