:root {
  --bg: #0d1117;
  --bg-2: #161b22;
  --bg-3: #1a2332;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hi: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.08);
  --border-hi: rgba(88, 166, 255, 0.35);
  --text: #e6edf3;
  --text-dim: rgba(255, 255, 255, 0.65);
  --text-mute: rgba(255, 255, 255, 0.4);
  --accent: #58a6ff;
  --accent-hi: #7db9ff;
  --accent-glow: rgba(88, 166, 255, 0.45);
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --radius: 14px;
  --radius-lg: 22px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(1100px 600px at 15% -10%, rgba(88, 166, 255, 0.12), transparent 60%),
    radial-gradient(900px 500px at 110% 10%, rgba(124, 58, 237, 0.08), transparent 60%),
    linear-gradient(160deg, #0d1117 0%, #161b22 40%, #1a2332 100%);
  background-attachment: fixed;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: none; transition: color 160ms; }
a:hover { color: var(--accent-hi); }

code {
  font-family: var(--mono);
  font-size: 0.92em;
  background: rgba(255, 255, 255, 0.06);
  padding: 0.1em 0.4em;
  border-radius: 5px;
  color: #d5dae1;
}

pre {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  overflow-x: auto;
  color: #d5dae1;
  font-size: 13.5px;
  line-height: 1.65;
}
pre code { background: transparent; padding: 0; }

h2 {
  font-size: 32px;
  letter-spacing: -0.01em;
  margin: 0 0 28px;
}
h3 { font-size: 17px; margin: 0 0 10px; letter-spacing: -0.005em; }
.muted { color: var(--text-mute); }

/* ---------- nav ---------- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 40px;
  max-width: 1200px;
  margin: 0 auto;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.18em;
  font-size: 15px;
}
.brand img { filter: drop-shadow(0 0 8px var(--accent-glow)); }
.nav-links { display: flex; gap: 26px; }
.nav-links a {
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text); }

/* ---------- hero ---------- */
.hero {
  max-width: 860px;
  margin: 40px auto 80px;
  padding: 40px 40px 60px;
  text-align: center;
}
.hero-inner { display: flex; flex-direction: column; align-items: center; }
.hero-mark {
  filter: drop-shadow(0 0 24px var(--accent-glow));
  margin-bottom: 28px;
}
.hero-title {
  font-size: clamp(48px, 8vw, 88px);
  font-weight: 800;
  letter-spacing: 0.12em;
  margin: 0;
  text-shadow: 0 2px 18px rgba(88, 166, 255, 0.35);
}
.hero-subtitle {
  margin: 6px 0 0;
  color: var(--accent);
  font-size: 15px;
  letter-spacing: 0.32em;
  font-weight: 500;
}
.hero-divider {
  width: 88px;
  height: 2px;
  background: var(--accent);
  opacity: 0.55;
  margin: 32px 0;
  border-radius: 2px;
}
.hero-lead {
  max-width: 620px;
  font-size: 18px;
  color: var(--text-dim);
  margin: 0 0 40px;
  line-height: 1.6;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 30px;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin: 6px 0 0;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  transition: transform 160ms, box-shadow 200ms, background 200ms, border-color 200ms;
  cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, #58a6ff 0%, #3b82f6 100%);
  color: #0b1220;
  box-shadow: 0 10px 30px -10px var(--accent-glow),
              inset 0 1px 0 rgba(255, 255, 255, 0.35);
}
.btn-primary:hover {
  transform: translateY(-1px);
  color: #0b1220;
  box-shadow: 0 14px 36px -10px var(--accent-glow),
              inset 0 1px 0 rgba(255, 255, 255, 0.35);
}
.btn-icon { font-size: 18px; line-height: 1; }
.btn-label {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  line-height: 1.15;
}
.btn-label strong { font-size: 16px; font-weight: 700; }
.btn-label em {
  font-style: normal;
  font-weight: 500;
  font-size: 12px;
  opacity: 0.75;
  letter-spacing: 0.01em;
}
.btn-ghost {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-ghost:hover {
  background: var(--surface-hi);
  border-color: var(--border-hi);
  color: var(--text);
}

/* ---------- pills ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.04em;
  font-weight: 600;
  background: rgba(88, 166, 255, 0.12);
  color: var(--accent);
  border: 1px solid rgba(88, 166, 255, 0.25);
}
.pill-muted {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text-dim);
  font-weight: 500;
}

/* ---------- features ---------- */
.features, .install, .roadmap, .tech {
  max-width: 1100px;
  margin: 0 auto;
  padding: 70px 40px;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 18px;
}
.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 200ms, border-color 200ms, background 200ms;
}
.feature:hover {
  transform: translateY(-2px);
  border-color: var(--border-hi);
  background: var(--surface-hi);
}
.feature-icon {
  width: 44px; height: 44px;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(88, 166, 255, 0.1);
  border: 1px solid rgba(88, 166, 255, 0.25);
  border-radius: 12px;
  font-size: 20px;
  margin-bottom: 14px;
}
.feature p {
  color: var(--text-dim);
  font-size: 14.5px;
  margin: 0;
  line-height: 1.6;
}

/* ---------- install ---------- */
.install-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 22px;
}
.install-col {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.install-col p { color: var(--text-dim); font-size: 13.5px; margin: 12px 0 0; }

/* ---------- roadmap ---------- */
.roadmap-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 34px;
  position: relative;
  overflow: hidden;
}
.roadmap-card::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(500px 260px at 90% -10%, rgba(88, 166, 255, 0.16), transparent 60%);
  pointer-events: none;
}
.roadmap-tag {
  display: inline-block;
  padding: 5px 11px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background: rgba(88, 166, 255, 0.15);
  color: var(--accent);
  border: 1px solid rgba(88, 166, 255, 0.3);
  border-radius: 999px;
  margin-bottom: 18px;
}
.roadmap-card h3 { font-size: 22px; margin-bottom: 14px; }
.roadmap-card p { color: var(--text-dim); margin: 0 0 10px; font-size: 15px; }

/* ---------- tech pills ---------- */
.tech-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.tech-pill {
  display: inline-block;
  padding: 7px 13px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-dim);
  font-family: var(--mono);
}

/* ---------- footer ---------- */
.footer {
  text-align: center;
  padding: 50px 40px 60px;
  color: var(--text-dim);
  font-size: 14px;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}
.footer p { margin: 6px 0; }

/* ---------- mobile ---------- */
@media (max-width: 720px) {
  .nav { padding: 16px 22px; }
  .nav-links { display: none; }
  .hero { padding: 24px 22px 40px; margin-top: 20px; margin-bottom: 40px; }
  .features, .install, .roadmap, .tech { padding: 50px 22px; }
  h2 { font-size: 26px; }
  .roadmap-card { padding: 26px; }
}