:root { --bg: #0f1220; --ink: #eef1f7; --muted: #a9b0c1; }
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(1200px 600px at 10% -10%, #243058 0, transparent 60%),
              radial-gradient(900px 600px at 110% 10%, #5b2b7c 0, transparent 60%),
              var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

.wrap { max-width: 940px; padding: 16px; margin: 0 auto; }
h1 { margin: 8px 0 4px; font-size: clamp(28px, 4vw, 40px); }
p { color: var(--muted); margin: 6px 0 18px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

.stack > * + * { margin-top: 12px; }

.card {
  display: block;
  padding: 18px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  text-decoration: none;
  color: inherit;
  transition: transform .08s ease, background .2s ease, border-color .2s ease;
}
.card:hover, .card:focus-visible {
  transform: translateY(-2px);
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.18);
  outline: none;
}
.card h2 { margin: 0 0 6px; font-size: 20px; }
.back {
  display: inline-block;
  padding: 8px 10px;
  margin: 8px 0 2px;
  text-decoration: none;
  color: var(--ink);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 12px;
}
.back:focus-visible { outline: 2px solid #8fb1ff; outline-offset: 2px; }

footer { opacity: .8; }