:root {
  --site-bg: #020617;
  --site-panel: rgba(15, 23, 42, 0.78);
  --site-panel-strong: rgba(15, 23, 42, 0.92);
  --site-border: rgba(148, 163, 184, 0.18);
  --site-accent: #38bdf8;
  --site-accent-strong: #0ea5e9;
  --site-text: #e2e8f0;
  --site-muted: #94a3b8;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  color: var(--site-text);
  background:
    radial-gradient(circle at top left, rgba(14, 165, 233, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(56, 189, 248, 0.14), transparent 24%),
    linear-gradient(180deg, #020617 0%, #0f172a 100%);
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
}

.site-shell {
  min-height: 100vh;
}

.hero-header {
  background: linear-gradient(180deg, rgba(2, 6, 23, 0.84), rgba(2, 6, 23, 0.35));
  backdrop-filter: blur(12px);
}

.eyebrow {
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--site-accent);
  font-size: 0.8rem;
}

.hero-panel,
.content-panel {
  background: var(--site-panel);
  border: 1px solid var(--site-border);
  box-shadow: 0 20px 60px rgba(2, 6, 23, 0.35);
  backdrop-filter: blur(16px);
}

.hero-panel {
  background: var(--site-panel-strong);
}

.btn-primary {
  --bs-btn-bg: var(--site-accent-strong);
  --bs-btn-border-color: var(--site-accent-strong);
  --bs-btn-hover-bg: #0284c7;
  --bs-btn-hover-border-color: #0284c7;
  --bs-btn-active-bg: #0369a1;
  --bs-btn-active-border-color: #0369a1;
}

.content-panel h2,
.content-panel h3,
.content-panel h4 {
  margin-top: 2rem;
}

.content-panel p,
.content-panel li {
  color: var(--site-text);
}

.content-panel a {
  color: #7dd3fc;
}

.content-panel code,
.content-panel pre {
  background: rgba(15, 23, 42, 0.95);
  border-color: rgba(148, 163, 184, 0.16);
}

.content-panel pre {
  padding: 1rem;
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 1rem;
}

.content-panel table {
  width: 100%;
}

@media (max-width: 767.98px) {
  .display-4 {
    font-size: 2.4rem;
  }

  .content-panel {
    padding: 1.25rem;
  }
}