:root {
  --paper: #f7efe3;
  --paper-hot: #fff8ed;
  --paper-deep: #ead8c2;
  --ink: #201b16;
  --ink-soft: #5c5045;
  --ink-faint: #8e7d6a;
  --ash: #34302a;
  --vermilion: #b53325;
  --vermilion-deep: #7c2018;
  --gold: #b98538;
  --line: rgba(70, 53, 38, .16);
  --line-hot: rgba(181, 51, 37, .24);
  --font-mincho: "Songti SC", "STSong", "Noto Serif CJK SC", Georgia, serif;
  --font-body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", system-ui, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(circle at 14% 8%, rgba(181, 51, 37, .18), transparent 22rem),
    radial-gradient(circle at 88% 18%, rgba(185, 133, 56, .18), transparent 24rem),
    linear-gradient(115deg, rgba(32, 27, 22, .05), transparent 42%),
    var(--paper);
  overflow-x: hidden;
}

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

code {
  font-family: var(--font-mono);
  color: var(--vermilion);
}

.paper-grid,
.ink-scan {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.paper-grid {
  z-index: -3;
  background:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px),
    linear-gradient(var(--line-hot) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-hot) 1px, transparent 1px);
  background-size: 26px 26px, 26px 26px, 104px 104px, 104px 104px;
}

.ink-scan {
  z-index: -2;
  opacity: .7;
  background:
    linear-gradient(100deg, transparent 0 22%, rgba(255, 255, 255, .34) 31%, transparent 44%),
    radial-gradient(circle at 52% 0, rgba(32, 27, 22, .12), transparent 28rem);
  mask-image: linear-gradient(to bottom, #000, transparent 78%);
}

.site-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .85rem clamp(1rem, 4vw, 3.5rem);
  border-bottom: 1px solid rgba(70, 53, 38, .16);
  background: rgba(247, 239, 227, .78);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  font-family: var(--font-mincho);
  letter-spacing: .24em;
}

.brand img {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 35%;
  box-shadow: 0 10px 24px -18px var(--ink);
}

.site-nav nav {
  display: flex;
  gap: clamp(.9rem, 3vw, 2.2rem);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

.site-nav a:hover {
  color: var(--vermilion);
}

main,
.footer {
  width: min(1220px, calc(100% - 2rem));
  margin: 0 auto;
}

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(340px, .84fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
  padding: 7.8rem 0 5rem;
}

.hero-mark {
  position: absolute;
  inset: 4.8rem auto auto 50%;
  z-index: 1;
  display: flex;
  gap: clamp(.2rem, 1.6vw, 1rem);
  translate: -50% 0;
  color: rgba(181, 51, 37, .09);
  font-family: var(--font-mincho);
  font-size: clamp(12rem, 30vw, 26rem);
  line-height: .72;
  letter-spacing: -.08em;
  user-select: none;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--vermilion);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .26em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 8.4em;
  margin-bottom: 1.4rem;
  font-family: var(--font-mincho);
  font-size: clamp(4.2rem, 11.5vw, 9.6rem);
  font-weight: 500;
  line-height: .88;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 1rem;
  font-family: var(--font-mincho);
  font-size: clamp(2.25rem, 5.4vw, 5.2rem);
  font-weight: 500;
  line-height: .98;
  letter-spacing: 0;
}

h3 {
  margin-bottom: .75rem;
  font-family: var(--font-mincho);
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: .08em;
}

.lead {
  max-width: 42rem;
  margin-bottom: 2rem;
  color: var(--ink-soft);
  font-family: var(--font-mincho);
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 2;
  letter-spacing: .04em;
}

.hero-actions,
.download-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .9rem;
}

.seal-btn,
.paper-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.1rem;
  padding: .78rem 1.25rem;
  font-family: var(--font-mincho);
  letter-spacing: .16em;
}

.seal-btn {
  background: var(--vermilion);
  color: var(--paper-hot);
  box-shadow: 0 20px 44px -28px var(--vermilion-deep);
}

.seal-btn:hover {
  background: var(--vermilion-deep);
}

.paper-link {
  border: 1px solid rgba(70, 53, 38, .22);
  background: rgba(255, 248, 237, .54);
  color: var(--ink);
}

.paper-link:hover {
  border-color: rgba(181, 51, 37, .48);
  color: var(--vermilion);
}

.ghost-link {
  color: var(--ink-soft);
  border-bottom: 1px solid currentColor;
  padding-bottom: .18rem;
  font-family: var(--font-mincho);
  letter-spacing: .1em;
}

.hero-console {
  z-index: 2;
  position: relative;
  border: 1px solid rgba(32, 27, 22, .35);
  background: var(--ink);
  color: var(--paper-hot);
  box-shadow: 0 34px 90px -50px rgba(32, 27, 22, .82);
  transform: rotate(1.5deg);
}

.hero-console::before {
  content: '';
  position: absolute;
  inset: -14px;
  z-index: -1;
  border: 1px solid rgba(181, 51, 37, .28);
  transform: rotate(-3deg);
}

.console-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .9rem 1rem;
  border-bottom: 1px solid rgba(247, 239, 227, .16);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: rgba(247, 239, 227, .66);
}

.console-top b {
  color: #ffb1a4;
  font-weight: 500;
}

.console-body {
  min-height: 34rem;
  padding: 1rem;
  background:
    linear-gradient(rgba(247, 239, 227, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 239, 227, .045) 1px, transparent 1px),
    var(--ink);
  background-size: 24px 24px;
}

.line,
.qcard,
.stream {
  margin-bottom: .9rem;
  padding: .9rem 1rem;
  border: 1px solid rgba(247, 239, 227, .14);
  font-family: var(--font-mincho);
  line-height: 1.85;
  background: rgba(247, 239, 227, .055);
}

.line.user {
  margin-left: auto;
  width: 82%;
  border-color: rgba(181, 51, 37, .35);
  background: rgba(181, 51, 37, .16);
}

.line.ai {
  width: 86%;
}

.qcard {
  border-color: rgba(255, 177, 164, .4);
  background: rgba(181, 51, 37, .12);
}

.qcard small,
.stream small {
  display: block;
  margin-bottom: .4rem;
  color: #ffb1a4;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .18em;
}

.qcard strong {
  display: block;
  margin-bottom: .25rem;
  font-weight: 500;
}

.qcard span {
  color: rgba(247, 239, 227, .68);
  font-size: .88rem;
}

.stream p {
  margin: 0;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: -2.4rem 0 6rem;
  border: 1px solid rgba(70, 53, 38, .18);
  background: rgba(70, 53, 38, .18);
}

.metrics div {
  min-height: 10rem;
  padding: 1.25rem;
  background: rgba(255, 248, 237, .68);
}

.metrics b {
  display: block;
  margin-bottom: .55rem;
  color: var(--vermilion);
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  line-height: 1;
}

.metrics span {
  color: var(--ink-soft);
  line-height: 1.8;
}

.section {
  padding: 5.5rem 0;
}

.section-head {
  max-width: 54rem;
  margin-bottom: 2.2rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.feature-grid article {
  min-height: 16rem;
  padding: 1.25rem;
  border: 1px solid rgba(70, 53, 38, .16);
  background:
    linear-gradient(rgba(70, 53, 38, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(70, 53, 38, .035) 1px, transparent 1px),
    rgba(255, 248, 237, .58);
  background-size: 22px 22px;
  transition: transform .35s ease, border-color .35s ease, background-color .35s ease;
}

.feature-grid article:hover {
  transform: translateY(-4px);
  border-color: rgba(181, 51, 37, .32);
  background-color: rgba(255, 248, 237, .82);
}

.feature-grid span {
  display: inline-block;
  margin-bottom: 3rem;
  color: var(--vermilion);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .2em;
}

.feature-grid p,
.roleplay-copy p,
.timeline p,
.privacy p,
.download p,
.footer {
  color: var(--ink-soft);
  line-height: 1.9;
}

.roleplay {
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  gap: 1rem;
  align-items: stretch;
}

.roleplay-copy {
  padding: clamp(1.4rem, 4vw, 2.7rem);
  border: 1px solid rgba(70, 53, 38, .16);
  background: rgba(255, 248, 237, .6);
}

.director-board {
  display: grid;
  gap: .75rem;
  padding: clamp(1.1rem, 3vw, 1.6rem);
  background: var(--ash);
  color: var(--paper-hot);
}

.director-board div {
  padding: 1rem;
  border: 1px solid rgba(247, 239, 227, .14);
  background: rgba(247, 239, 227, .055);
}

.director-board b {
  display: block;
  margin-bottom: .4rem;
  color: #ffb1a4;
  font-family: var(--font-mono);
  font-size: .86rem;
  letter-spacing: .08em;
}

.director-board span {
  color: rgba(247, 239, 227, .74);
  line-height: 1.8;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid rgba(70, 53, 38, .16);
  background: rgba(70, 53, 38, .16);
}

.timeline li {
  padding: 1.25rem;
  background: rgba(255, 248, 237, .64);
}

.timeline span {
  display: block;
  margin-bottom: 5rem;
  color: var(--vermilion);
  font-family: var(--font-mono);
  letter-spacing: .22em;
}

.timeline b {
  display: block;
  margin-bottom: .5rem;
  font-family: var(--font-mincho);
  font-size: 1.2rem;
  font-weight: 500;
}

.privacy {
  display: grid;
  grid-template-columns: .9fr 1fr;
  gap: 2rem;
  align-items: center;
  border-top: 1px solid rgba(70, 53, 38, .16);
  border-bottom: 1px solid rgba(70, 53, 38, .16);
}

.privacy p {
  margin: 0;
  font-family: var(--font-mincho);
  font-size: clamp(1rem, 2vw, 1.18rem);
  letter-spacing: .04em;
}

.download {
  margin: 4rem 0 6rem;
  padding: clamp(1.5rem, 5vw, 3.4rem);
  text-align: center;
  border: 1px solid rgba(181, 51, 37, .22);
  background:
    radial-gradient(circle at 50% 0, rgba(181, 51, 37, .14), transparent 20rem),
    rgba(255, 248, 237, .68);
}

.download h2 {
  max-width: 11em;
  margin-left: auto;
  margin-right: auto;
}

.download p {
  max-width: 45rem;
  margin-left: auto;
  margin-right: auto;
}

.download-actions {
  justify-content: center;
  margin-top: 1.6rem;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 2rem 0 3rem;
  border-top: 1px solid rgba(70, 53, 38, .16);
  font-size: .85rem;
}

.feature-grid article,
.roleplay-copy,
.director-board,
.timeline,
.privacy,
.download {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s ease, transform .7s ease;
}

.feature-grid article.is-visible,
.roleplay-copy.is-visible,
.director-board.is-visible,
.timeline.is-visible,
.privacy.is-visible,
.download.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 920px) {
  .site-nav nav {
    display: none;
  }

  .hero,
  .roleplay,
  .privacy {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 6.8rem;
  }

  .hero-console {
    transform: none;
  }

  .metrics,
  .feature-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

  .metrics {
    margin-top: 0;
  }

  h1 {
    font-size: clamp(4rem, 18vw, 6.6rem);
  }

  .hero-mark {
    top: 5.8rem;
    font-size: clamp(12rem, 44vw, 18rem);
  }

  .console-body {
    min-height: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}