:root {
  color-scheme: light dark;
  --background: #f4f7fb;
  --surface: rgba(255, 255, 255, 0.86);
  --text: #10213c;
  --muted: #61718c;
  --line: rgba(16, 33, 60, 0.1);
  --accent: #1478ff;
  --accent-strong: #0059d8;
  --glow: rgba(20, 120, 255, 0.18);
  --shadow: 0 24px 70px rgba(38, 65, 105, 0.13);
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #07101f;
    --surface: rgba(17, 30, 50, 0.86);
    --text: #f4f8ff;
    --muted: #a5b3c9;
    --line: rgba(255, 255, 255, 0.1);
    --accent: #61a7ff;
    --accent-strong: #8fc0ff;
    --glow: rgba(36, 132, 255, 0.2);
    --shadow: 0 28px 80px rgba(0, 0, 0, 0.34);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 12% 2%, var(--glow), transparent 30rem),
    radial-gradient(circle at 88% 12%, rgba(71, 214, 177, 0.1), transparent 24rem),
    var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--accent-strong);
  text-underline-offset: 0.18em;
}

.shell {
  width: min(880px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 42px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 17px;
  font-weight: 700;
  text-decoration: none;
}

.mark {
  position: relative;
  width: 28px;
  height: 28px;
  border: 1px solid rgba(20, 120, 255, 0.3);
  border-radius: 9px;
  background: linear-gradient(145deg, rgba(20, 120, 255, 0.22), rgba(20, 120, 255, 0.04));
  box-shadow: 0 8px 24px var(--glow);
}

.mark::after {
  position: absolute;
  top: 12px;
  left: 5px;
  width: 18px;
  height: 4px;
  border-radius: 999px;
  background: var(--accent);
  content: "";
  clip-path: polygon(0 50%, 22% 50%, 34% 0, 49% 100%, 62% 30%, 73% 50%, 100% 50%, 100% 72%, 68% 72%, 64% 62%, 49% 100%, 34% 38%, 28% 72%, 0 72%);
}

.links {
  display: flex;
  gap: 18px;
  font-size: 14px;
}

.links a {
  color: var(--muted);
  text-decoration: none;
}

.links a:hover {
  color: var(--text);
}

.hero {
  padding: 32px 4px 36px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(38px, 7vw, 68px);
  font-weight: 760;
  letter-spacing: -0.045em;
  line-height: 1.04;
}

.lede {
  max-width: 690px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 2.8vw, 21px);
}

.card {
  margin-top: 26px;
  padding: clamp(24px, 5vw, 48px);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.card h2 {
  margin: 34px 0 8px;
  font-size: 22px;
  letter-spacing: -0.02em;
}

.card h2:first-child {
  margin-top: 0;
}

.card p,
.card ul {
  color: var(--muted);
}

.card ul {
  padding-left: 1.2em;
}

.card strong {
  color: var(--text);
}

.language-note,
.updated {
  color: var(--muted);
  font-size: 14px;
}

.language-note {
  margin-top: 18px;
}

.section-separator {
  height: 1px;
  margin: 44px 0;
  border: 0;
  background: var(--line);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  color: var(--text);
  font-weight: 650;
  text-decoration: none;
}

.button.primary {
  border-color: transparent;
  background: var(--accent);
  color: #fff;
}

footer {
  padding: 32px 4px 0;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 560px) {
  .shell {
    width: min(100% - 24px, 880px);
    padding-top: 18px;
  }

  .nav {
    align-items: flex-start;
    margin-bottom: 22px;
  }

  .links {
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
  }

  .hero {
    padding-top: 24px;
  }

  .card {
    border-radius: 22px;
  }
}