:root {
  color-scheme: dark;
  --bg: #070908;
  --panel: #141715;
  --panel-2: #1d211e;
  --text: #f5f7f5;
  --muted: #aeb5af;
  --line: rgba(255, 255, 255, 0.1);
  --accent: #b7dc2b;
  --accent-2: #32d74b;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 85% 0%, rgba(183, 220, 43, 0.12), transparent 32rem),
    var(--bg);
  color: var(--text);
  line-height: 1.65;
}

a { color: var(--accent); }
a:hover { color: #d7f36d; }

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand img {
  width: 48px;
  height: 48px;
  border-radius: 12px;
}

nav { display: flex; flex-wrap: wrap; gap: 16px; }
nav a { color: var(--muted); text-decoration: none; }

main { padding: 64px 0 80px; }

.hero { padding: 48px 0 56px; }
.eyebrow { color: var(--accent); font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; }
h1 { margin: 8px 0 20px; max-width: 760px; font-size: clamp(44px, 8vw, 76px); line-height: 1; letter-spacing: -0.055em; }
h2 { margin-top: 48px; font-size: 28px; line-height: 1.2; letter-spacing: -0.03em; }
h3 { margin-top: 32px; }
p, li { color: var(--muted); }
.lead { max-width: 720px; font-size: 20px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.card {
  display: block;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(145deg, var(--panel-2), var(--panel));
  color: var(--text);
  text-decoration: none;
}

.card strong { display: block; margin-bottom: 8px; font-size: 19px; }
.card span { color: var(--muted); }

.notice {
  padding: 18px 20px;
  border-left: 4px solid var(--accent);
  border-radius: 8px 18px 18px 8px;
  background: rgba(183, 220, 43, 0.08);
}

.language {
  margin: 48px 0;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
}

.language h2 { margin-top: 0; }

footer {
  padding: 28px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

code {
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--panel-2);
  color: var(--text);
}

@media (max-width: 640px) {
  header { align-items: flex-start; flex-direction: column; }
  main { padding-top: 36px; }
  .language { padding: 20px; }
}