:root {
  --paper: #f4f0e5;
  --paper-light: #faf7ee;
  --ink: #1d372f;
  --muted: #65766e;
  --forest: #244c3e;
  --forest-hover: #183d31;
  --line: rgba(36, 76, 62, 0.18);
  --focus: #b86736;
  --serif: Georgia, "Times New Roman", serif;
  --sans: "Segoe UI", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  margin: 0;
  color: var(--ink);
  background: #e9e5da;
  font-family: var(--sans);
}

@media (min-width: 681px) {
  body { position: fixed; inset: 0; }
}

button { font: inherit; }

.home {
  position: relative;
  isolation: isolate;
  display: grid;
  width: 100%;
  height: 100svh;
  min-height: 0;
  overflow: hidden;
  place-items: center;
  padding: clamp(28px, 4vw, 72px);
  background:
    radial-gradient(circle at 52% 49%, rgba(255, 253, 245, 0.98) 0 24%, rgba(250, 247, 237, 0.72) 46%, transparent 68%),
    linear-gradient(120deg, var(--paper-light) 0%, var(--paper) 57%, #e8ecdf 100%);
}

.home::before {
  content: "";
  position: absolute;
  z-index: -2;
  inset: clamp(10px, 1vw, 18px);
  border: 1px solid rgba(42, 66, 56, 0.08);
  border-radius: clamp(18px, 2vw, 32px);
  box-shadow: 0 20px 65px rgba(65, 72, 58, 0.08) inset;
}

.ambient {
  position: absolute;
  z-index: -1;
  width: min(34vw, 540px);
  aspect-ratio: 1;
  border-radius: 50%;
  filter: blur(30px);
  opacity: .3;
}

.ambient--left {
  left: -13vw;
  bottom: -24vw;
  background: radial-gradient(circle, #e9c89e 0, transparent 68%);
}

.ambient--right {
  top: -18vw;
  right: -13vw;
  background: radial-gradient(circle, #cbd7c2 0, transparent 68%);
}

.hero {
  display: grid;
  justify-items: center;
  width: min(1120px, 92vw);
  text-align: center;
}

.hero__heading { position: relative; z-index: 2; }

.eyebrow {
  margin: 0 0 clamp(12px, 1.5vh, 20px);
  color: #6d7b73;
  font-size: clamp(.9rem, 1vw, 1.05rem);
  font-weight: 600;
  letter-spacing: .18em;
}

h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.8rem, 6.1vw, 6.2rem);
  font-weight: 400;
  letter-spacing: .08em;
  line-height: .92;
  text-wrap: balance;
}

.subtitle {
  margin: clamp(16px, 2.2vh, 25px) 0 0;
  color: var(--muted);
  font-family: var(--serif);
  font-size: clamp(1rem, 1.2vw, 1.3rem);
  font-style: normal;
  letter-spacing: .04em;
}

.scene {
  position: relative;
  display: grid;
  width: min(600px, 62vw);
  aspect-ratio: 3 / 1.72;
  margin: clamp(12px, 1.8vh, 24px) 0 clamp(2px, .8vh, 10px);
  place-items: center;
}

.scene__halo {
  position: absolute;
  width: 76%;
  height: 48%;
  border-radius: 50%;
  background: rgba(255, 250, 232, .6);
  filter: blur(30px);
}

.scene__art {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 22px 20px rgba(71, 66, 44, .11));
  transform-origin: 52% 86%;
  animation: breathe 5.8s ease-in-out infinite;
}

.hero__action {
  display: grid;
  justify-items: center;
  gap: 12px;
}

.start-button {
  position: relative;
  display: inline-flex;
  min-width: 196px;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 8px 8px 12px;
  border: 0;
  border-radius: 0;
  color: var(--forest);
  background: transparent;
  box-shadow: none;
  cursor: pointer;
  font-weight: 600;
  letter-spacing: .18em;
  transition: color 220ms ease, opacity 150ms ease;
}

.start-button::after,
.start-button::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1px;
}

.start-button::after {
  width: 100%;
  background: rgba(36, 76, 62, .22);
}

.start-button::before {
  z-index: 1;
  width: 34%;
  height: 2px;
  background: var(--forest);
  transition: width 240ms cubic-bezier(.4, 0, .2, 1);
}

.start-button svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
  transition: transform 180ms ease;
}

.start-button:hover {
  color: var(--forest-hover);
}

.start-button:hover::before { width: 100%; }
.start-button:hover svg { transform: translateX(3px); }
.start-button:active { opacity: .68; }
.start-button:focus-visible { outline: 2px solid color-mix(in srgb, var(--focus) 62%, white); outline-offset: 5px; }

.hint {
  margin: 0;
  color: #78857e;
  font-size: clamp(.9rem, .9vw, 1rem);
  letter-spacing: .04em;
}

.chapter {
  position: absolute;
  right: clamp(30px, 4vw, 72px);
  bottom: clamp(26px, 3.5vw, 60px);
  display: flex;
  margin: 0;
  align-items: center;
  gap: 12px;
  color: #75847c;
  font-size: .88rem;
  font-weight: 600;
  letter-spacing: .1em;
}

.chapter::before { content: ""; width: 44px; height: 1px; background: var(--line); }
.chapter span { color: var(--ink); font-family: var(--serif); font-size: 1rem; }

.home.is-leaving .hero { animation: leave 650ms cubic-bezier(.4, 0, .2, 1) forwards; }
.home.is-leaving::after {
  content: "";
  position: absolute;
  z-index: 10;
  inset: 0;
  background: var(--paper);
  opacity: 0;
  animation: veil 700ms ease forwards;
  pointer-events: none;
}

@keyframes breathe {
  0%, 100% { transform: translateY(0) rotate(-.15deg); }
  50% { transform: translateY(-5px) rotate(.15deg); }
}

@keyframes leave { to { opacity: 0; transform: scale(.985) translateY(-8px); } }
@keyframes veil { to { opacity: 1; } }

@media (max-width: 680px) {
  .home { padding: 56px 24px 44px; }
  .eyebrow { max-width: 290px; line-height: 1.7; }
  h1 { max-width: 12ch; font-size: clamp(3rem, 14vw, 4.7rem); line-height: .98; }
  .subtitle { max-width: 28ch; line-height: 1.55; }
  .scene { width: min(620px, 100%); margin-block: 18px 8px; }
  .chapter { display: none; }
}

@media (max-height: 760px) and (min-width: 681px) {
  .home { padding-block: 28px; }
  .scene { width: min(520px, 52vw); margin-block: 6px 0; }
  h1 { font-size: clamp(3rem, 5.5vw, 5.6rem); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}