:root {
  --yellow: #FFD84D;
  --yellow-soft: #FFF4C2;
  --ink: #1A1A1A;
  --muted: #666;
  --line: #EAEAEA;
  --bg: #FFFDF5;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}

a { color: var(--ink); text-decoration: none; }
a:hover { opacity: 0.7; }

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 32px;
  border-bottom: 1px solid var(--line);
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
}
.brand-logo {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  display: block;
}
.nav nav a {
  margin-left: 24px;
  font-size: 15px;
  color: var(--muted);
}

main { max-width: 1040px; margin: 0 auto; padding: 0 32px; }

.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 80px 0 64px;
}
.hero h1 {
  font-size: 56px;
  line-height: 1.05;
  margin: 0 0 20px;
  letter-spacing: -0.02em;
}
.lede {
  font-size: 19px;
  color: var(--muted);
  margin: 0 0 32px;
  max-width: 520px;
}
.cta {
  display: inline-block;
  background: var(--ink);
  color: #fff;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
}
.cta[aria-disabled="true"] {
  background: var(--muted);
  cursor: default;
  pointer-events: none;
}
.small { color: var(--muted); font-size: 13px; margin-top: 12px; }

.hero-art {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1;
}
.hero-logo {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 56px;
  box-shadow: 0 20px 60px rgba(255, 180, 40, 0.35);
}

.features { padding: 56px 0; border-top: 1px solid var(--line); }
.features h2 {
  font-size: 28px;
  margin: 0 0 32px;
  letter-spacing: -0.01em;
}
.grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.grid li {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.grid li strong { font-size: 15px; }
.grid li span { color: var(--muted); font-size: 14px; }

footer {
  max-width: 1040px;
  margin: 48px auto 0;
  padding: 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  display: flex;
  justify-content: space-between;
}
footer .links a { margin-left: 20px; color: var(--muted); }

.doc {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 32px 80px;
}
.doc h1 {
  font-size: 36px;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}
.doc .updated { color: var(--muted); font-size: 14px; margin-bottom: 32px; }
.doc h2 { font-size: 20px; margin-top: 36px; }
.doc p, .doc li { color: #333; }
.doc a { text-decoration: underline; }

@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; padding: 48px 0 32px; }
  .hero h1 { font-size: 40px; }
  .hero-art { display: none; }
  .grid { grid-template-columns: 1fr; }
  .nav { padding: 16px 20px; }
  main { padding: 0 20px; }
}