:root {
  --bg: #0b0c10;
  --bg2: #12141a;
  --ink: #e8eaef;
  --muted: #9aa3b5;
  --line: #2a3040;
  --acc: #6ea8ff;
  --acc2: #3d7dff;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 "Segoe UI", system-ui, sans-serif; }
a { color: var(--acc); text-decoration: none; }
a:hover { text-decoration: underline; }
.nav {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 8vw; border-bottom: 1px solid var(--line); position: sticky; top: 0;
  background: rgba(11,12,16,.92); backdrop-filter: blur(10px); z-index: 5;
}
.brand { display: flex; gap: 10px; align-items: center; color: var(--ink); font-weight: 700; letter-spacing: .04em; font-size: 18px; }
.mark {
  width: 28px; height: 28px; border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #9ec0ff, #2b5fff 55%, #0b0c10);
  box-shadow: 0 0 0 2px #1c2433;
}
.nav nav { display: flex; gap: 22px; }
.nav nav a { color: var(--muted); }
.hero { padding: 72px 8vw 48px; max-width: 1100px; }
.kicker { color: var(--acc); letter-spacing: .16em; text-transform: uppercase; font-size: 12px; margin: 0 0 12px; }
h1 { font-size: clamp(36px, 6vw, 64px); line-height: 1.05; margin: 0 0 18px; letter-spacing: -0.03em; }
.lead { max-width: 640px; color: var(--muted); font-size: 18px; }
.cta { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 20px; border-radius: 8px; font-weight: 600;
  border: 1px solid var(--line);
}
.btn.primary { background: var(--acc2); color: #fff; border-color: transparent; }
.btn.ghost { color: var(--ink); }
.btn:hover { text-decoration: none; filter: brightness(1.08); }
.grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px; padding: 24px 8vw 48px;
}
.grid article {
  background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 22px;
}
.grid h2 { margin: 0 0 8px; font-size: 18px; }
.grid p { margin: 0; color: var(--muted); }
code { color: #c9d4ff; font-size: 0.92em; }
.keys { padding: 8px 8vw 48px; }
.keys ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.keys li { background: var(--bg2); border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; color: var(--muted); }
kbd { color: var(--ink); font-weight: 700; }
.download { padding: 32px 8vw 72px; border-top: 1px solid var(--line); }
.fine { color: var(--muted); font-size: 13px; }
footer { padding: 24px 8vw 40px; color: #6b7384; font-size: 13px; border-top: 1px solid var(--line); }
@media (max-width: 700px) {
  .nav nav { display: none; }
  .hero { padding-top: 40px; }
}