:root {
  color-scheme: dark;
  --bg: #080b10;
  --panel: rgba(19, 25, 34, 0.74);
  --panel-solid: #121923;
  --line: rgba(174, 193, 216, 0.18);
  --text: #edf3f8;
  --muted: #a9b6c5;
  --accent: #72d6c9;
  --accent-2: #82a9ff;
  --max: 880px;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  margin: 0;
  min-height: 100vh;
  font: 16px/1.65 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 0%, rgba(65, 116, 156, 0.22), transparent 35rem),
    radial-gradient(circle at 88% 18%, rgba(32, 126, 116, 0.17), transparent 28rem),
    var(--bg);
}

a { color: var(--accent); text-underline-offset: 0.2em; }
a:hover { color: #a2eee4; }

.shell { width: min(calc(100% - 2rem), var(--max)); margin: 0 auto; }
.site-header { padding: 1.25rem 0; border-bottom: 1px solid var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { color: var(--text); font-weight: 680; letter-spacing: 0.02em; text-decoration: none; }
.nav-links { display: flex; flex-wrap: wrap; gap: 0.9rem; }
.nav-links a { color: var(--muted); font-size: 0.9rem; text-decoration: none; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); }

main { padding: 5rem 0 4rem; }
.hero { padding: 2.5rem 0 3.5rem; }
.eyebrow { color: var(--accent); font-size: 0.78rem; font-weight: 760; letter-spacing: 0.16em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.18; letter-spacing: -0.025em; }
h1 { max-width: 13ch; margin: 0.55rem 0 1.25rem; font-size: clamp(2.55rem, 8vw, 5.2rem); }
h2 { margin-top: 2.8rem; font-size: clamp(1.45rem, 3vw, 2rem); }
h3 { margin-top: 1.6rem; font-size: 1.08rem; }
.lead { max-width: 65ch; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.24rem); }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 2rem 0; }
.card {
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--panel);
  backdrop-filter: blur(14px);
}
.card h2, .card h3 { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }

.prose { max-width: 76ch; }
.prose p, .prose li { color: #cbd5df; }
.prose strong { color: var(--text); }
.prose ul { padding-left: 1.25rem; }
.notice { margin: 2rem 0; padding: 1.1rem 1.25rem; border-left: 3px solid var(--accent-2); background: rgba(83, 119, 186, 0.12); }
.meta { color: var(--muted); font-size: 0.9rem; }
.button {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.7rem 1rem;
  border: 1px solid rgba(114, 214, 201, 0.45);
  border-radius: 0.65rem;
  color: var(--text);
  background: rgba(114, 214, 201, 0.08);
  text-decoration: none;
}

.site-footer { padding: 2rem 0 3rem; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.88rem; }
.footer-row { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

@media (max-width: 700px) {
  main { padding-top: 3rem; }
  .nav { align-items: flex-start; flex-direction: column; }
  .grid { grid-template-columns: 1fr; }
}