:root {
  color-scheme: dark;
  --bg: #11171d;
  --panel: #1c252d;
  --text: #f4f7fb;
  --muted: #aab6c2;
  --line: rgba(255,255,255,.11);
  --blue: #4da0ff;
  --green: #38d46a;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(77,160,255,.28), transparent 34rem),
    radial-gradient(circle at bottom right, rgba(56,212,106,.18), transparent 30rem),
    var(--bg);
  color: var(--text);
}

.shell {
  width: min(1040px, calc(100vw - 40px));
  margin: 0 auto;
  padding: 64px 0;
}

.hero {
  min-height: 420px;
  display: grid;
  align-content: center;
}

.eyebrow {
  color: var(--green);
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}

h1 {
  max-width: 820px;
  margin: 0 0 20px;
  font-size: clamp(42px, 7vw, 78px);
  line-height: .96;
}

h2 {
  margin: 0 0 10px;
  font-size: 22px;
}

.lead {
  max-width: 720px;
  color: var(--muted);
  font-size: 22px;
  line-height: 1.45;
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  background: var(--blue);
  color: white;
  font-weight: 700;
  text-decoration: none;
}

.button.secondary {
  background: rgba(255,255,255,.1);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

article, section {
  border: 1px solid var(--line);
  background: rgba(28,37,45,.72);
  border-radius: 8px;
  padding: 22px;
}

article p, section p, li {
  color: var(--muted);
  line-height: 1.58;
}

.page {
  max-width: 860px;
}

.page section {
  margin-top: 16px;
}

.back {
  display: inline-flex;
  margin-bottom: 28px;
  color: var(--blue);
  text-decoration: none;
  font-weight: 700;
}

.updated {
  color: var(--muted);
}

@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  .shell { padding: 40px 0; }
  .lead { font-size: 19px; }
}