:root {
  --bg: #0b0d12;
  --panel: #121620;
  --text: #e8ecf1;
  --muted: #a6b0bb;
  --primary: #4f8cff;
  --primary-700: #3d71d9;
  --accent: #21d4a3;
  --danger: #ff6b6b;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(0,0,0,.25);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 1200px at 10% -10%, rgba(79,140,255,.15), transparent 60%),
              radial-gradient(1000px 1000px at 110% 0%, rgba(33,212,163,.12), transparent 50%),
              var(--bg);
  color: var(--text);
  line-height: 1.6;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container {
  width: min(1100px, 92%);
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11,13,18,.6);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}
.brand {
  font-weight: 700;
  letter-spacing: .3px;
}
.site-nav ul {
  margin: 0; padding: 0; list-style: none;
  display: flex; gap: 18px;
}
.site-nav a { color: var(--muted); }
.site-nav a:hover { color: var(--text); }

.hero {
  padding: 72px 0 48px;
}
.hero h1 { font-size: clamp(2rem, 4vw + 1rem, 3rem); margin: 0 0 8px; }
.hero p { color: var(--muted); margin: 0 0 16px; }

.actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 16px; border-radius: 999px; border: 1px solid rgba(255,255,255,.12);
  background: #0f1320; color: var(--text); transition: .2s ease; box-shadow: var(--shadow);
}
.btn:hover { transform: translateY(-1px); border-color: rgba(255,255,255,.2); }
.btn.primary { background: linear-gradient(135deg, var(--primary), var(--primary-700)); border-color: transparent; }

.features { padding: 32px 0 64px; }
.grid-3 {
  display: grid; gap: 16px;
  grid-template-columns: repeat(3, 1fr);
}
.grid-3 article {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow);
}
.grid-3 h2 { margin: 0 0 8px; font-size: 1.25rem; }
.grid-3 p { margin: 0; color: var(--muted); }

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .grid-3 { grid-template-columns: 1fr; }
  .site-nav ul { gap: 12px; }
}

.site-footer {
  padding: 28px 0; border-top: 1px solid rgba(255,255,255,.06);
  color: var(--muted);
}