:root {
  --bg: #fafaf9;
  --fg: #1c1917;
  --muted: #78716c;
  --line: #e7e5e4;
  --card: #ffffff;
  --accent: #4f46e5;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0a09;
    --fg: #f5f5f4;
    --muted: #a8a29e;
    --line: #292524;
    --card: #1c1917;
    --accent: #818cf8;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  position: sticky; top: 0; z-index: 10;
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px max(16px, calc((100% - 960px) / 2));
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.logo { font-weight: 800; letter-spacing: .05em; color: var(--fg); }
nav { display: flex; gap: 20px; }
nav a { color: var(--muted); font-size: 15px; }
nav a:hover { color: var(--fg); text-decoration: none; }

main, footer { max-width: 960px; margin: 0 auto; padding: 0 16px; }
section { padding: 64px 0; border-top: 1px solid var(--line); }
.hero { border-top: 0; padding: 96px 0 72px; }
.eyebrow { color: var(--accent); font-weight: 600; margin: 0 0 8px; }
h1 { font-size: clamp(2.5rem, 8vw, 4.5rem); line-height: 1.05; margin: 0 0 20px; letter-spacing: -.03em; }
h2 { font-size: 1.6rem; margin: 0 0 20px; letter-spacing: -.01em; }
h3 { margin: 0 0 8px; }
.tagline { font-size: 1.25rem; color: var(--muted); max-width: 36em; }

.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.btn {
  padding: 10px 20px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--fg); font-weight: 600;
}
.btn:hover { text-decoration: none; border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }

.cards { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px; }
.card p { color: var(--muted); margin: 0 0 12px; }

.tags { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.tags li { border: 1px solid var(--line); background: var(--card); border-radius: 999px; padding: 6px 16px; font-size: 15px; }

.email { font-size: 1.4rem; font-weight: 600; }
.muted { color: var(--muted); }
footer { padding-top: 24px; padding-bottom: 40px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); }

@media (max-width: 520px) {
  nav { gap: 14px; }
  .hero { padding-top: 56px; }
}