:root {
  color-scheme: dark;
  --espresso: #0b0705;
  --umber: #24150e;
  --cream: #f2e8d9;
  --muted: rgba(242, 232, 217, 0.58);
  --gold: #b99a68;
  --ease-film: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--espresso);
}

body,
button,
a {
  color: var(--cream);
  font-family: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  -webkit-font-smoothing: antialiased;
}

button {
  font: inherit;
}

.prototype {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  isolation: isolate;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 50% 46%, rgba(100, 61, 34, 0.42), transparent 58%),
    linear-gradient(145deg, #24150e 0%, #0f0906 56%, #070403 100%);
}

.prototype.is-playing {
  cursor: none;
}

.prototype-stage,
.prototype-scene,
.prototype-scene__ambient,
.prototype-scene__tone,
.prototype-vignette {
  position: absolute;
  inset: 0;
}

.prototype-stage {
  z-index: 1;
}

.prototype-scene {
  overflow: hidden;
  opacity: 0;
  transform: scale(1.018);
  transition:
    opacity 520ms var(--ease-film),
    transform 900ms var(--ease-film);
  will-change: opacity, transform;
}

.prototype-scene--active {
  z-index: 2;
  opacity: 1;
  transform: scale(1);
}

.prototype-scene__ambient {
  z-index: 0;
  display: flex;
  overflow: hidden;
  opacity: 0.75;
  filter: blur(76px) saturate(0.9) brightness(0.42);
  transform: scale(1.2);
}

.prototype-scene__ambient img {
  min-width: 0;
  height: 100%;
  flex: 1 1 0;
  object-fit: cover;
}

.prototype-scene__tone {
  z-index: 1;
  background:
    radial-gradient(ellipse at 50% 48%, color-mix(in srgb, var(--ambient) 44%, transparent), transparent 60%),
    linear-gradient(135deg, rgba(48, 28, 17, 0.22), rgba(8, 5, 4, 0.66));
  mix-blend-mode: screen;
}

.prototype-layout {
  position: absolute;
  z-index: 2;
  inset: 0;
}

.prototype-photo {
  position: absolute;
  overflow: hidden;
  background: transparent;
  transform: translate3d(0, 0, 0);
}

.prototype-photo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 44%;
  filter: saturate(0.92) contrast(1.035) brightness(0.9);
  animation: prototype-breathe 1.75s linear both;
  will-change: transform;
}

.prototype-photo--contain img {
  object-fit: contain;
  object-position: center;
}

.prototype-layout--landscape .prototype-photo {
  inset: 0;
}

.prototype-layout--landscape .prototype-photo img {
  object-position: center;
}

.prototype-layout--portrait-2 .prototype-photo:nth-child(1) {
  top: 3vh;
  bottom: 10vh;
  left: 7vw;
  width: 44vw;
  z-index: 2;
}

.prototype-layout--portrait-2 .prototype-photo:nth-child(2) {
  top: 17vh;
  right: 5vw;
  bottom: 4vh;
  width: 43vw;
  z-index: 3;
}

.prototype-layout--portrait-3 .prototype-photo:nth-child(1) {
  top: 15vh;
  bottom: 6vh;
  left: 0;
  width: 34vw;
  z-index: 2;
}

.prototype-layout--portrait-3 .prototype-photo:nth-child(2) {
  top: 2vh;
  bottom: 2vh;
  left: 50%;
  width: 38vw;
  z-index: 4;
  transform: translateX(-50%);
}

.prototype-layout--portrait-3 .prototype-photo:nth-child(3) {
  top: 9vh;
  right: 0;
  bottom: 13vh;
  width: 34vw;
  z-index: 3;
}

.prototype-photo--hero-zoom img {
  animation: prototype-hero-zoom 1.55s var(--ease-film) both;
}

.character-canvas {
  position: absolute;
  z-index: 4;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  filter: drop-shadow(0 2.3vh 2.5vh rgba(0, 0, 0, 0.48));
}

.kinetic-copy {
  --copy-x: 0vw;
  --copy-y: 0vh;
  position: absolute;
  z-index: 5;
  top: 50%;
  left: 50%;
  width: min(78vw, 88rem);
  pointer-events: none;
  opacity: 0;
  transform: translate(calc(-50% + var(--copy-x)), calc(-50% + var(--copy-y)));
  transition: opacity 260ms ease;
  text-align: center;
  text-shadow: 0 0.25em 1em rgba(8, 4, 2, 0.6);
}

.kinetic-copy.is-visible {
  opacity: 1;
}

.kinetic-copy[data-side="left"] {
  --copy-x: -17vw;
  width: min(58vw, 66rem);
  text-align: left;
}

.kinetic-copy[data-side="right"] {
  --copy-x: 17vw;
  width: min(58vw, 66rem);
  text-align: right;
}

.kinetic-copy__eyebrow {
  margin: 0 0 clamp(0.75rem, 1.8vh, 1.6rem);
  color: rgba(232, 202, 157, 0.86);
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(0.55rem, 0.72vw, 0.86rem);
  font-weight: 700;
  letter-spacing: 0.48em;
  text-transform: uppercase;
}

.kinetic-copy__lines {
  display: flex;
  flex-direction: column;
  gap: 0.03em;
  font-size: clamp(3.2rem, 7.2vw, 9rem);
  font-weight: 400;
  letter-spacing: 0.09em;
  line-height: 1.06;
}

.kinetic-copy__line {
  display: block;
  opacity: 0;
  will-change: transform, opacity, filter;
}

.kinetic-copy.is-visible .kinetic-copy__line {
  animation: copy-reveal 850ms var(--ease-film) forwards;
}

.kinetic-copy.is-visible .kinetic-copy__line:nth-child(2) {
  animation-delay: 130ms;
}

.kinetic-copy[data-motion="page"] .kinetic-copy__line {
  transform-origin: left center;
  animation-name: copy-page;
}

.kinetic-copy[data-motion="look"] .kinetic-copy__line:nth-child(1) {
  animation-name: copy-look-left;
}

.kinetic-copy[data-motion="look"] .kinetic-copy__line:nth-child(2) {
  animation-name: copy-look-right;
}

.kinetic-copy[data-motion="hold"] .kinetic-copy__line {
  animation-name: copy-hold;
}

.kinetic-copy[data-motion="push"] .kinetic-copy__line {
  animation-name: copy-push;
}

.kinetic-copy[data-motion="turn"] .kinetic-copy__line {
  animation-name: copy-turn;
}

.kinetic-copy[data-motion="finale"] .kinetic-copy__lines {
  font-size: clamp(2.7rem, 6.2vw, 7.4rem);
}

.kinetic-copy[data-motion="finale"] .kinetic-copy__line {
  animation-name: copy-finale;
}

.page-sweep {
  position: absolute;
  z-index: 3;
  inset: -14%;
  pointer-events: none;
  opacity: 0;
  background: linear-gradient(96deg, transparent 28%, rgba(243, 223, 193, 0.18) 48%, rgba(255, 246, 231, 0.03) 62%, transparent 74%);
  transform: translateX(-88%) skewX(-9deg);
}

.page-sweep.is-active {
  animation: page-sweep 1.65s var(--ease-film) both;
}

.prototype-grain {
  position: absolute;
  z-index: 7;
  inset: -50%;
  width: 200%;
  height: 200%;
  pointer-events: none;
  opacity: 0.042;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.88' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.82'/%3E%3C/svg%3E");
  animation: prototype-grain 0.23s steps(2) infinite;
}

.prototype-vignette {
  z-index: 6;
  pointer-events: none;
  box-shadow:
    inset 0 0 13vw rgba(0, 0, 0, 0.48),
    inset 0 0 2vw rgba(0, 0, 0, 0.2);
  background: linear-gradient(180deg, rgba(9, 5, 3, 0.28), transparent 22%, transparent 75%, rgba(9, 5, 3, 0.4));
}

.prototype-gate,
.prototype-end {
  position: absolute;
  z-index: 20;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 7vh 8vw;
  text-align: center;
  background:
    radial-gradient(circle at 50% 43%, rgba(104, 64, 36, 0.24), transparent 39%),
    rgba(9, 5, 3, 0.66);
  backdrop-filter: blur(10px);
  transition: opacity 800ms ease, visibility 800ms;
}

.prototype-gate.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.prototype-gate__content,
.prototype-end__content {
  width: min(58rem, 84vw);
  transform: translateY(-1vh);
}

.prototype-gate__eyebrow,
.prototype-end__content > p {
  margin: 0 0 clamp(1.1rem, 2.4vh, 2.2rem);
  color: var(--gold);
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(0.58rem, 0.72vw, 0.84rem);
  font-weight: 700;
  letter-spacing: 0.46em;
}

.prototype-gate h1,
.prototype-end h2 {
  margin: 0;
  font-size: clamp(3.3rem, 7.8vw, 8.8rem);
  font-weight: 400;
  letter-spacing: 0.08em;
  line-height: 1.08;
}

.prototype-gate h1 span {
  color: rgba(242, 232, 217, 0.34);
  font-style: italic;
}

.prototype-gate__sub {
  margin: clamp(1.2rem, 2.6vh, 2.4rem) 0 0;
  color: var(--muted);
  font-size: clamp(0.75rem, 1vw, 1.15rem);
  letter-spacing: 0.18em;
}

.prototype-loading {
  width: min(34rem, 72vw);
  margin: clamp(2.1rem, 5vh, 4.6rem) auto clamp(1.5rem, 3.6vh, 3rem);
}

.prototype-loading__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.72rem;
  color: rgba(242, 232, 217, 0.64);
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(0.58rem, 0.67vw, 0.78rem);
  letter-spacing: 0.12em;
}

.prototype-loading__track {
  height: 1px;
  overflow: hidden;
  background: rgba(242, 232, 217, 0.15);
}

.prototype-loading__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, #8f6a3d, #e0c59c);
  box-shadow: 0 0 1.4rem rgba(224, 197, 156, 0.38);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 260ms ease;
}

.prototype-start,
.prototype-end button,
.prototype-end a {
  position: relative;
  min-width: min(20rem, 72vw);
  border: 1px solid rgba(222, 196, 155, 0.45);
  border-radius: 999px;
  padding: 1rem 2.4rem 1.08rem;
  color: var(--cream);
  background: rgba(67, 42, 26, 0.24);
  font-size: clamp(0.82rem, 1vw, 1.06rem);
  letter-spacing: 0.2em;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 220ms ease, background 220ms ease, opacity 220ms ease, transform 220ms ease;
}

.prototype-start:disabled {
  opacity: 0.42;
  cursor: wait;
}

.prototype-start:not(:disabled):hover,
.prototype-end button:hover,
.prototype-end a:hover {
  border-color: rgba(239, 214, 176, 0.8);
  background: rgba(96, 61, 36, 0.38);
  transform: translateY(-2px);
}

.prototype-start__pulse {
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  margin-right: 0.85rem;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 0 rgba(185, 154, 104, 0.48);
  animation: start-pulse 2s infinite;
  vertical-align: 0.06em;
}

.prototype-gate__hint {
  margin: 1.2rem 0 0;
  color: rgba(242, 232, 217, 0.38);
  font-size: clamp(0.66rem, 0.75vw, 0.85rem);
  letter-spacing: 0.09em;
}

.prototype-end[hidden] {
  display: none;
}

.prototype-end {
  animation: end-reveal 800ms ease both;
}

.prototype-end h2 {
  font-size: clamp(2.4rem, 5.4vw, 6.2rem);
}

.prototype-end__actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: clamp(2rem, 5vh, 4rem);
}

.prototype-end button,
.prototype-end a {
  min-width: 12rem;
}

.prototype-status,
.prototype-error {
  position: absolute;
  z-index: 30;
  left: 50%;
  bottom: 5vh;
  opacity: 0;
  transform: translate(-50%, 1rem);
  transition: opacity 220ms ease, transform 220ms ease;
  pointer-events: none;
}

.prototype-status {
  border: 1px solid rgba(238, 221, 193, 0.2);
  border-radius: 999px;
  padding: 0.7rem 1.2rem;
  background: rgba(12, 7, 4, 0.65);
  color: rgba(242, 232, 217, 0.78);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  backdrop-filter: blur(8px);
}

.prototype-status.is-visible,
.prototype-error.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.prototype-error {
  width: min(40rem, 84vw);
  color: #f0c6b4;
  text-align: center;
  font-size: 0.9rem;
}

@keyframes prototype-breathe {
  from { transform: scale(1.012); }
  to { transform: scale(1.055) translate3d(0.35%, -0.25%, 0); }
}

@keyframes prototype-hero-zoom {
  from { transform: scale(0.86); filter: saturate(0.78) contrast(1.02) brightness(0.82); }
  to { transform: scale(1.035); filter: saturate(0.96) contrast(1.04) brightness(0.92); }
}

@keyframes copy-reveal {
  from { opacity: 0; filter: blur(12px); transform: translateY(0.48em); }
  to { opacity: 1; filter: blur(0); transform: translateY(0); }
}

@keyframes copy-page {
  from { opacity: 0; filter: blur(8px); transform: perspective(900px) rotateY(-42deg) translateX(-0.32em); }
  to { opacity: 1; filter: blur(0); transform: perspective(900px) rotateY(0) translateX(0); }
}

@keyframes copy-look-left {
  from { opacity: 0; filter: blur(10px); transform: translateX(-0.65em); }
  to { opacity: 1; filter: blur(0); transform: translateX(0); }
}

@keyframes copy-look-right {
  from { opacity: 0; filter: blur(10px); transform: translateX(0.65em); }
  to { opacity: 1; filter: blur(0); transform: translateX(0); }
}

@keyframes copy-hold {
  0% { opacity: 0; filter: blur(8px); transform: scale(1.12); letter-spacing: 0.18em; }
  100% { opacity: 1; filter: blur(0); transform: scale(1); letter-spacing: 0.09em; }
}

@keyframes copy-push {
  0% { opacity: 0; filter: blur(4px); transform: translateX(0.9em) skewX(-6deg); }
  65% { opacity: 1; transform: translateX(-0.08em) skewX(1deg); }
  100% { opacity: 1; filter: blur(0); transform: translateX(0) skewX(0); }
}

@keyframes copy-turn {
  from { opacity: 0; filter: blur(10px); transform: perspective(900px) rotateX(18deg) translateY(0.42em); }
  to { opacity: 1; filter: blur(0); transform: perspective(900px) rotateX(0) translateY(0); }
}

@keyframes copy-finale {
  0% { opacity: 0; filter: blur(12px); transform: scale(1.2); }
  60% { opacity: 1; filter: blur(0); transform: scale(0.97); }
  100% { opacity: 1; transform: scale(1); }
}

@keyframes page-sweep {
  0% { opacity: 0; transform: translateX(-88%) skewX(-9deg); }
  24% { opacity: 1; }
  100% { opacity: 0; transform: translateX(88%) skewX(-9deg); }
}

@keyframes prototype-grain {
  0% { transform: translate3d(0, 0, 0); }
  25% { transform: translate3d(-2%, 1%, 0); }
  50% { transform: translate3d(1%, -2%, 0); }
  75% { transform: translate3d(2%, 2%, 0); }
  100% { transform: translate3d(-1%, 1%, 0); }
}

@keyframes start-pulse {
  0% { box-shadow: 0 0 0 0 rgba(185, 154, 104, 0.48); }
  70% { box-shadow: 0 0 0 0.55rem rgba(185, 154, 104, 0); }
  100% { box-shadow: 0 0 0 0 rgba(185, 154, 104, 0); }
}

@keyframes end-reveal {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (max-aspect-ratio: 4 / 3) {
  .kinetic-copy[data-side="left"],
  .kinetic-copy[data-side="right"] {
    --copy-x: 0vw;
    --copy-y: -18vh;
    width: 84vw;
    text-align: center;
  }

  .prototype-layout--portrait-2 .prototype-photo:nth-child(1) {
    left: 1vw;
    width: 53vw;
  }

  .prototype-layout--portrait-2 .prototype-photo:nth-child(2) {
    right: 1vw;
    width: 51vw;
  }
}

@media (prefers-reduced-motion: reduce) {
  .prototype-photo img,
  .prototype-grain,
  .prototype-start__pulse,
  .kinetic-copy__line,
  .page-sweep {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
  }
}