:root {
  --ink: #1a2436;
  --muted: #637387;
  --page: #f5f7fc;
  --card: #ffffff;
  --line: #e3e8f0;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eef2f8;
    --muted: #9aa8ba;
    --page: #0f141d;
    --card: #171e2a;
    --line: #253043;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 500 17px/1.6 ui-rounded, "SF Pro Rounded", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }

header.top {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 20px 0;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--ink); text-decoration: none; }
.brand-dot {
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
}
nav a { color: var(--muted); text-decoration: none; margin-left: 18px; font-size: 15px; }
nav a:hover, nav a[aria-current="page"] { color: var(--ink); }

.hero { padding: 56px 0 32px; }
.hero h1 { font-size: clamp(36px, 7vw, 56px); line-height: 1.08; margin: 0 0 16px; letter-spacing: -0.02em; }
.hero p { font-size: 19px; color: var(--muted); max-width: 560px; margin: 0 0 28px; }

.cta {
  display: inline-block; padding: 14px 26px; border-radius: 999px; color: #fff; font-weight: 700;
  text-decoration: none; background: linear-gradient(90deg, var(--accent), var(--accent2));
}
.cta.soon { opacity: 0.85; cursor: default; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; padding: 24px 0 48px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 20px; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

.doc { padding: 24px 0 48px; }
.doc h1 { font-size: 36px; line-height: 1.15; margin: 16px 0 6px; }
.doc .meta { color: var(--muted); font-size: 14px; margin: 0 0 24px; }
.doc .summary { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 14px; padding: 16px 18px; margin-bottom: 28px; }
.doc h2 { font-size: 21px; margin: 32px 0 8px; }
.doc p { margin: 0 0 12px; }
.doc dt { font-weight: 700; margin-top: 18px; }
.doc dd { margin: 4px 0 0; color: var(--muted); }

footer { border-top: 1px solid var(--line); padding: 24px 0 40px; color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); }

@media (max-width: 520px) {
  header.top { flex-direction: column; align-items: flex-start; }
  nav a { margin: 0 16px 0 0; }
}