:root {
  color-scheme: dark;
  --gg-bg: #0c1017;
  --gg-bg-elevated: #141b26;
  --gg-surface: #1a2332;
  --gg-surface-hover: #222d3f;
  --gg-border: #2d3a4f;
  --gg-text: #e8edf4;
  --gg-text-muted: #94a3b8;
  --gg-accent: #38bdf8;
  --gg-accent-strong: #0ea5e9;
  --gg-accent-glow: rgba(56, 189, 248, 0.18);
  --gg-radius: 12px;
  --gg-radius-lg: 18px;
  --gg-shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
  --gg-font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --gg-mono: ui-monospace, "Cascadia Code", "Source Code Pro", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--gg-font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--gg-text);
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--gg-accent-glow), transparent),
    linear-gradient(180deg, #0f1623 0%, var(--gg-bg) 42%);
  background-color: var(--gg-bg);
}

a {
  color: var(--gg-accent);
  text-decoration: none;
}

a:hover {
  color: #7dd3fc;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--gg-border);
  background: rgba(12, 16, 23, 0.88);
  backdrop-filter: blur(10px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 72rem;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--gg-text);
  font-weight: 650;
  letter-spacing: -0.02em;
}

.site-brand:hover {
  color: var(--gg-text);
}

.site-brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  background: linear-gradient(145deg, var(--gg-accent-strong), #6366f1);
  font-size: 0.95rem;
  line-height: 1;
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.35);
}

.site-brand__text {
  font-size: 1.1rem;
}

.site-brand__pkg {
  font-family: var(--gg-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--gg-text-muted);
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--gg-border);
  border-radius: 999px;
  background: var(--gg-bg-elevated);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.site-nav__link {
  display: inline-block;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  color: var(--gg-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition:
    color 0.15s ease,
    background 0.15s ease;
}

.site-nav__link:hover {
  color: var(--gg-text);
  background: var(--gg-surface);
}

.site-nav__link--active {
  color: var(--gg-text);
  background: var(--gg-surface);
  border: 1px solid var(--gg-border);
}

.site-main {
  max-width: 72rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.hero {
  text-align: center;
  padding: 2.5rem 0 2rem;
}

.hero__badge {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--gg-border);
  background: var(--gg-surface);
  color: var(--gg-text-muted);
  font-size: 0.8rem;
  font-weight: 500;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 5vw, 2.85rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 700;
}

.hero__lead {
  margin: 0 auto 1.75rem;
  max-width: 36rem;
  color: var(--gg-text-muted);
  font-size: 1.05rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.2;
  transition:
    transform 0.15s ease,
    background 0.15s ease,
    border-color 0.15s ease,
    box-shadow 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  color: #041018;
  background: linear-gradient(135deg, #38bdf8, #0ea5e9);
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.35);
}

.btn--primary:hover {
  color: #041018;
  box-shadow: 0 10px 28px rgba(14, 165, 233, 0.45);
}

.btn--secondary {
  color: var(--gg-text);
  background: var(--gg-surface);
  border-color: var(--gg-border);
}

.btn--secondary:hover {
  color: var(--gg-text);
  background: var(--gg-surface-hover);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
}

.card {
  display: block;
  padding: 1.35rem 1.25rem;
  border-radius: var(--gg-radius-lg);
  border: 1px solid var(--gg-border);
  background: var(--gg-surface);
  box-shadow: var(--gg-shadow);
  transition:
    transform 0.18s ease,
    border-color 0.18s ease,
    background 0.18s ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 189, 248, 0.45);
  background: var(--gg-surface-hover);
}

.card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  margin-bottom: 0.85rem;
  border-radius: 10px;
  background: var(--gg-bg-elevated);
  color: var(--gg-accent);
  font-size: 1.1rem;
}

.card h2 {
  margin: 0 0 0.45rem;
  font-size: 1.1rem;
  font-weight: 650;
  color: var(--gg-text);
}

.card p {
  margin: 0;
  color: var(--gg-text-muted);
  font-size: 0.92rem;
}

.card code {
  font-family: var(--gg-mono);
  font-size: 0.85em;
  color: #bae6fd;
}

.card__arrow {
  display: block;
  margin-top: 0.85rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gg-accent);
}

.site-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--gg-border);
  text-align: center;
  color: var(--gg-text-muted);
  font-size: 0.85rem;
}

.site-footer a {
  font-weight: 500;
}

@media (max-width: 640px) {
  .site-brand__pkg {
    display: none;
  }

  .site-header__inner {
    padding: 0.75rem 1rem;
  }

  .site-main {
    padding: 1.5rem 1rem 2.5rem;
  }

  .hero {
    padding: 1.5rem 0 1.25rem;
  }
}