:root {
  --bg: #0b0f14;
  --surface: #121922;
  --surface-2: #17212b;
  --text: #e8eef5;
  --muted: #9fb0c3;
  --accent: #20d6e7;
  --border: #243140;
  --link: #68e8f3;
  --max: 920px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #0b0f14 0%, #0e141c 100%);
  color: var(--text);
  line-height: 1.7;
}

.wrap {
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(11, 15, 20, 0.82);
  border-bottom: 1px solid rgba(36, 49, 64, 0.9);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 18px rgba(32, 214, 231, 0.55);
}

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

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: 0.2s ease;
}

nav a:hover {
  color: var(--text);
  border-color: var(--accent);
}

main {
  padding: 36px 0 64px;
}

.hero {
  padding: 28px;
  background: linear-gradient(180deg, rgba(18,25,34,0.95), rgba(23,33,43,0.95));
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
  margin-bottom: 24px;
}

.eyebrow {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 10px;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(32px, 6vw, 54px);
  line-height: 1.05;
}

.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  max-width: 720px;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 14px;
}

.meta span {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(32, 214, 231, 0.08);
  border: 1px solid rgba(32, 214, 231, 0.18);
}

section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
  margin: 18px 0;
}

h2 {
  margin: 0 0 14px;
  font-size: 24px;
  line-height: 1.2;
}

h3 {
  margin: 18px 0 10px;
  font-size: 18px;
}

p, li {
  color: var(--text);
}

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

ul {
  margin: 10px 0 0;
  padding-left: 20px;
}

li + li {
  margin-top: 8px;
}

a {
  color: var(--link);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
}

footer {
  padding: 32px 0 60px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

code.inline {
  padding: 2px 8px;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.95em;
}

@media (max-width: 640px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  section {
    padding: 22px;
  }

  nav {
    width: 100%;
  }
}