:root {
  --bg: #08101d;
  --bg2: #111a34;
  --panel: rgba(255, 255, 255, 0.06);
  --line: rgba(255, 255, 255, 0.12);
  --text: #ffffff;
  --muted: rgba(255, 255, 255, 0.74);
  --soft: rgba(255, 255, 255, 0.54);
  --accent: #ffffff;
  --danger: #ffcdc6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", ui-sans-serif, system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(120, 148, 255, 0.18), transparent 32%),
    linear-gradient(180deg, var(--bg2), var(--bg));
}

a { color: inherit; }

.page {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 40px;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}

.brand {
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--soft);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav a,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 15px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: inherit;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #08101d;
  border-color: transparent;
  font-weight: 700;
}

.hero,
.card {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
  backdrop-filter: blur(14px);
  box-shadow: 0 16px 36px rgba(4, 10, 18, 0.16);
}

.hero {
  padding: 28px;
  margin-bottom: 18px;
}

.eyebrow {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--soft);
}

h1, h2, h3, p, ul {
  margin: 0;
}

h1 {
  margin-top: 10px;
  font-size: clamp(32px, 4vw, 46px);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.lead,
.copy,
li {
  color: var(--muted);
  line-height: 1.65;
}

.lead { margin-top: 14px; font-size: 16px; }
.copy { margin-top: 12px; }

.grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  padding: 22px;
}

.card h2,
.card h3 {
  font-size: 21px;
  letter-spacing: -0.03em;
}

.stack {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.meta {
  display: grid;
  gap: 8px;
  margin-top: 14px;
  color: var(--muted);
}

.warning,
.note {
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.warning {
  color: var(--danger);
  background: rgba(255, 205, 198, 0.08);
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

ul {
  padding-left: 18px;
}

footer {
  margin-top: 22px;
  color: var(--soft);
  font-size: 13px;
}

@media (max-width: 860px) {
  .page {
    width: min(100% - 20px, 1120px);
    padding: 18px 0 28px;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .hero,
  .card {
    padding: 18px;
    border-radius: 20px;
  }
}