:root {
  --bg: #0f172a;
  --panel: #111827;
  --panel-alt: #1f2937;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.16);
  --border: #334155;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.22);
  --max-width: 1100px;
  --radius: 14px;
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(180deg, #0b1220 0%, #111827 100%);
  color: var(--text);
  line-height: 1.6;
}

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

a:hover {
  color: #7dd3fc;
}

.container {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(4px);
}

.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: bold;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
}

.intro {
  max-width: 65ch;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.page-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-nav a {
  display: inline-block;
  padding: 0.55rem 0.9rem;
  text-decoration: none;
  color: var(--text);
  background: var(--accent-soft);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 999px;
}

.page-nav a:hover {
  background: rgba(56, 189, 248, 0.24);
  color: #ffffff;
}

main {
  padding: 2rem 0 3rem;
}

.resource-section {
  margin-bottom: 1.5rem;
  padding: 1.25rem 1.25rem 1rem;
  background: rgba(17, 24, 39, 0.82);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.resource-section h2 {
  margin-top: 0;
  margin-bottom: 0.85rem;
  font-size: 1.35rem;
}

.resource-list {
  margin: 0;
  padding-left: 1.25rem;
}

.resource-list li + li {
  margin-top: 0.35rem;
}

.resource-list a {
  text-decoration: none;
}

.resource-list a:hover {
  text-decoration: underline;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.feature-card {
  padding: 1rem;
  background: rgba(31, 41, 55, 0.7);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.feature-card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.button-link {
  display: inline-block;
  padding: 0.65rem 1rem;
  text-decoration: none;
  color: var(--text);
  background: var(--accent-soft);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 999px;
}

.button-link:hover {
  background: rgba(56, 189, 248, 0.24);
  color: #ffffff;
  text-decoration: none;
}

.site-footer {
  padding: 1.5rem 0 3rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

@media (max-width: 720px) {
  .site-header {
    padding-top: 2.25rem;
  }

  .resource-section {
    padding: 1rem;
  }

  .page-nav a {
    font-size: 0.95rem;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }
}