:root {
  --bg: #000;
  --fg: #fff;
  --muted: #b2b2b2;
  --hair: rgba(178, 178, 178, 0.5);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --pad-x: clamp(20px, 4vw, 48px);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-weight: 200;
  font-size: 16px;
  line-height: 1.21;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 120ms ease, opacity 120ms ease;
}
a:hover { border-bottom-color: var(--fg); }
a:focus-visible {
  outline: 1px solid var(--fg);
  outline-offset: 3px;
}

h1, p, ul { margin: 0; padding: 0; }
ul { list-style: none; }

main {
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

/* — brand (app icon + wordmark) — */
.brand {
  margin-top: clamp(48px, 7vw, 92px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.app-icon {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  display: block;
}
.wordmark {
  font-size: clamp(16px, 1.6vw, 22px);
  font-weight: 200;
  letter-spacing: 0;
}

/* — hero — */
.hero {
  margin-top: clamp(20px, 5vw, 20px);
  padding: 0 var(--pad-x);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  text-align: center;
}
h1 {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 200;
  line-height: 1.21;
  letter-spacing: 0;
  max-width: 40ch;
}
.appstore {
  display: inline-block;
  border: none;
  line-height: 0;
}
.appstore:hover { border: none; opacity: 0.85; }
.appstore img {
  display: block;
  height: 40px;
  width: auto;
}
.price {
  font-size: 13px;
  color: var(--muted);
}
.launch-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 0.5px solid var(--hair);
  border-radius: 999px;
  font-size: 13px;
  color: var(--muted);
  font-weight: 200;
}
.launch-pill span:first-child { color: var(--fg); }
.coming-soon {
  font-size: clamp(16px, 1.8vw, 22px);
  color: var(--muted);
  font-weight: 200;
  line-height: 40px;
}

/* — full-bleed video — */
.demo {
  width: 100%;
  margin-top: clamp(40px, 6vw, 54px);
}
.video {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #0a0a0a;
}
.video iframe {
  width: 100%;
  height: 100%;
  display: block;
  border: 0;
}

/* — tagline — */
.tagline {
  margin-top: clamp(48px, 6vw, 72px);
  text-align: center;
  padding: 0 var(--pad-x);
}
.tagline p {
  font-size: clamp(22px, 3.5vw, 36px);
  color: var(--muted);
  font-weight: 200;
}

/* — iPad shot — */
.shot {
  margin-top: clamp(40px, 5vw, 56px);
  padding: 0 var(--pad-x);
  display: flex;
  justify-content: center;
}
.shot img {
  width: 100%;
  max-width: 994px;
  height: auto;
  display: block;
}

/* — features — */
.features {
  margin-top: clamp(22px, 6vw, 22px);
  margin-bottom: clamp(60px, 8vw, 108px);
  padding: 0 var(--pad-x);
  text-align: center;
  font-size: clamp(16px, 2.2vw, 22px);
  font-weight: 200;
  line-height: 1.21;
}
.features ul li,
.features .platforms { padding: 1px 0; }
.features .platforms { margin-top: 1.21em; }

/* — contained walkthrough video — */
.walkthrough {
  margin-top: clamp(40px, 5vw, 56px);
  padding: 0 var(--pad-x);
  display: flex;
  justify-content: center;
}
.walkthrough .video {
  width: 100%;
  max-width: 994px;
  aspect-ratio: 16 / 9;
  background: #0a0a0a;
}

/* — guide link — */
.guide {
  margin-top: clamp(48px, 7vw, 72px);
  margin-bottom: clamp(60px, 8vw, 108px);
  text-align: center;
}
.guide a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: clamp(18px, 2.2vw, 22px);
}
.guide a img { display: block; height: 24px; width: 24px; }

/* — disclaimer — */
.disclaimer {
  text-align: center;
  padding: 0 var(--pad-x);
  margin: 0 auto clamp(24px, 4vw, 40px);
  font-size: 13px;
  color: var(--muted);
  max-width: 60ch;
}
.doc-body .disclaimer {
  margin-top: clamp(48px, 6vw, 80px);
  padding: 0;
}

/* — footer — */
footer {
  border-top: 0.5px solid var(--hair);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 16px;
  font-weight: 200;
  min-height: 44px;
}
footer .copy { color: var(--fg); }
.meta {
  display: flex;
  align-items: center;
  gap: 16px;
}
.meta a { color: var(--fg); }

/* — document pages (privacy, terms) — */
body.doc { display: block; min-height: 100vh; }
body.doc main { display: block; }

.doc-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px var(--pad-x);
  border-bottom: 0.5px solid var(--hair);
}
.doc-home {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: clamp(14px, 1.4vw, 16px);
  font-weight: 200;
  color: var(--fg);
}
.doc-home img { display: block; border-radius: 6px; }
.doc-home:hover { border-bottom: none; opacity: 0.85; }
.doc-back {
  font-size: clamp(13px, 1.3vw, 15px);
  color: var(--muted);
  font-weight: 200;
}
.doc-back:hover { color: var(--fg); border-bottom-color: var(--fg); }

.doc-body {
  width: 100%;
  max-width: 65ch;
  margin: 0 auto;
  padding: clamp(40px, 6vw, 88px) var(--pad-x) clamp(56px, 8vw, 104px);
  font-size: clamp(15px, 1.6vw, 18px);
  font-weight: 200;
  line-height: 1.6;
  color: var(--fg);
  box-sizing: border-box;
}
.doc-body h1 {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 200;
  line-height: 1.21;
  margin: 0 0 24px;
}
.doc-body h2 {
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 200;
  line-height: 1.3;
  margin: 2.4em 0 0.6em;
  color: var(--fg);
}
.doc-body p { margin: 0 0 1em; }
.doc-body p.lede { color: var(--fg); margin-bottom: 1em; }
.doc-body p.updated { color: var(--muted); font-size: clamp(13px, 1.2vw, 14px); margin-bottom: 2em; }
.doc-body ul,
.doc-body ol { padding-left: 1.4em; margin: 0 0 1em; }
.doc-body ul li { margin-bottom: 0.4em; list-style: disc; }
.doc-body ol li { margin-bottom: 0.4em; list-style: decimal; }

.doc-body ul.vfx-list { list-style: none; padding-left: 0; }
.doc-body ul.vfx-list li {
  list-style: none;
  color: var(--muted);
  margin-bottom: 0.5em;
}
.doc-body ul.vfx-list li strong {
  color: var(--fg);
  font-weight: 200;
}
.doc-body a {
  color: var(--fg);
  border-bottom: 1px solid var(--hair);
}
.doc-body a:hover { border-bottom-color: var(--fg); }
.doc-body strong { font-weight: 400; }
.doc-body em { font-style: italic; }

.doc-body h3 {
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 200;
  line-height: 1.3;
  margin: 1.6em 0 0.4em;
  color: var(--fg);
}

.doc-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
  color: var(--muted);
}

/* — guide page — */
.doc-index {
  margin: 0 0 clamp(40px, 6vw, 64px);
}
.doc-index ol {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: idx;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
.doc-index ol li {
  counter-increment: idx;
  border-top: 0.5px solid var(--hair);
  margin: 0;
  list-style: none;
}
.doc-index ol li:last-child { border-bottom: 0.5px solid var(--hair); }
.doc-index ol li a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border: none;
  color: var(--fg);
}
.doc-index ol li a::before {
  content: counter(idx);
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  min-width: 2ch;
}
.doc-index ol li a:hover { color: var(--fg); border: none; opacity: 0.7; }

.doc-body section {
  margin-top: clamp(48px, 6vw, 80px);
}
.doc-body section > h2 {
  margin-top: 0.4em;
}
.doc-body section:not(:has(.guide-figure)) {
  border-top: 0.5px solid var(--hair);
  padding-top: clamp(40px, 5vw, 64px);
}

.guide-figure {
  width: 100%;
  aspect-ratio: 3 / 2;
  background: #0a0a0a;
  border: 0.5px solid var(--hair);
  margin: 0 0 1.2em;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.guide-figure-label {
  color: var(--muted);
  font-size: clamp(13px, 1.2vw, 14px);
  letter-spacing: 0.02em;
}
.guide-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
/* svg variants — centered in the hairline box, scaled by tier */
.guide-figure--icon img,
.guide-figure--control img,
.guide-figure--element img {
  width: auto;
  height: auto;
  object-fit: contain;
  margin: 0 auto;
}
.guide-figure--icon img    { width: clamp(64px, 18%, 120px); }
.guide-figure--control img { width: clamp(80px, 20%, 140px); }
.guide-figure--element img { width: clamp(240px, 72%, 500px); }

/* — small screens — */
@media (max-width: 600px) {
  footer {
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px;
  }
  .meta { flex-wrap: wrap; justify-content: center; gap: 12px; }
}