:root {
  --accent: #5751cd;
  --accent-dark: #4a44b8;
  --bg: #ffffff;
  --bg-subtle: #f8f9fc;
  --text: #1a202c;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --card: #ffffff;
  --border: rgba(229, 231, 235, 0.8);
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-body);
  background: radial-gradient(900px 480px at 50% -12%, color-mix(in srgb, var(--accent) 7%, transparent), transparent), var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 72px 24px 48px; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.04em;
  color: var(--accent); background: color-mix(in srgb, var(--accent) 9%, #ffffff);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, #ffffff); border-radius: 999px;
  padding: 6px 12px; text-transform: uppercase;
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: #10b981; box-shadow: 0 0 8px rgba(16, 185, 129, 0.55); }
h1 { font-family: var(--mono); font-size: clamp(28px, 6vw, 44px); margin: 20px 0 8px; letter-spacing: -0.01em; color: var(--text); }
.lede { font-size: 18px; color: var(--text-secondary); margin: 0 0 40px; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  padding: 24px; margin-bottom: 16px; box-shadow: 0 1px 3px rgba(16, 24, 40, 0.04);
}
.card h2 { font-size: 14px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--accent); margin: 0 0 10px; }
.card p { margin: 0 0 10px; color: var(--text-secondary); }
.card p:last-child { margin-bottom: 0; }
.muted { color: var(--text-muted); }
strong { color: var(--text); }
code { font-family: var(--mono); background: color-mix(in srgb, var(--accent) 8%, #f1f5f9); color: var(--text); padding: 2px 6px; border-radius: 6px; font-size: 0.92em; }
a { color: var(--accent); font-weight: 600; text-decoration: none; }
a:hover { text-decoration: underline; }
.cta { display: inline-block; margin-top: 4px; background: var(--accent); color: #fff; padding: 12px 20px; border-radius: 10px; font-weight: 700; }
.cta:hover { background: var(--accent-dark); text-decoration: none; }
footer { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border); color: var(--text-muted); font-size: 14px; }
footer a { color: var(--text-muted); text-decoration: underline; }

/* 404 */
body.notfound { display: flex; align-items: center; justify-content: center; text-align: center; padding: 24px; }
body.notfound p { color: var(--text-secondary); margin: 0 0 8px; }