:root {
  --bg: #ffffff;
  --ink: #14181f;
  --muted: #5b6472;
  --surface: #f5f6f8;
  --line: #e4e7ec;
  --accent: #0b5fff;
  --accent-ink: #ffffff;
  --maxw: 1080px;
  --radius: 12px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--bg); line-height: 1.6; -webkit-font-smoothing: antialiased; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.9); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { font-weight: 700; color: var(--ink); font-size: 1.05rem; letter-spacing: -.01em; }
.brand:hover { text-decoration: none; }
.nav-links { display: flex; align-items: center; gap: 20px; }
.nav-links a { color: var(--muted); font-size: .95rem; }
.nav-links a:hover { color: var(--ink); text-decoration: none; }
.nav-toggle { display: none; }

.btn { display: inline-block; padding: 10px 18px; border-radius: 999px; font-size: .95rem; font-weight: 600; border: 1px solid transparent; cursor: pointer; }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { text-decoration: none; filter: brightness(1.05); }
.btn-ghost { border-color: var(--line); color: var(--ink); }
.btn-ghost:hover { text-decoration: none; border-color: var(--accent); }

.hero { padding: 96px 24px 72px; }
.kicker { text-transform: uppercase; letter-spacing: .12em; font-size: .8rem; font-weight: 700; color: var(--accent); margin: 0 0 12px; }
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); line-height: 1.08; letter-spacing: -.02em; margin: 0 0 18px; max-width: 16ch; }
.lede { font-size: clamp(1.05rem, 2vw, 1.3rem); color: var(--muted); max-width: 52ch; margin: 0 0 28px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.section { padding: 72px 0; }
.section-alt { background: var(--surface); }
.section h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); letter-spacing: -.02em; margin: 0 0 14px; }
.section-lede { color: var(--muted); max-width: 60ch; margin: 0; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 32px; }
.card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.card h3 { margin: 0 0 8px; font-size: 1.15rem; }
.card p { margin: 0; color: var(--muted); }

.site-footer { border-top: 1px solid var(--line); padding: 28px 0; }
.foot { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font-size: .9rem; flex-wrap: wrap; }

@media (max-width: 720px) {
  .nav-toggle { display: inline-block; background: none; border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; font-size: .9rem; }
  .nav-links { position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; align-items: flex-start; gap: 4px; background: var(--bg); border-bottom: 1px solid var(--line); padding: 12px 24px; display: none; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 0; width: 100%; }
  .grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}