:root {
  --bg: #0b0f14;
  --surface: #131a24;
  --border: #243044;
  --text: #e8eef7;
  --muted: #9aa8bc;
  --accent: #5b9cff;
  --accent-dim: #3d6fbf;
  --radius: 12px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, monospace;
}

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

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

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

a:hover {
  text-decoration: underline;
}

.hero {
  background: linear-gradient(160deg, #121c2e 0%, var(--bg) 55%);
  border-bottom: 1px solid var(--border);
  padding: 3.5rem 1.5rem 3rem;
}

.hero-inner {
  max-width: 720px;
  margin: 0 auto;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--muted);
  margin: 0 0 0.5rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}

.lead {
  color: var(--muted);
  font-size: 1.1rem;
  margin: 0 0 1.5rem;
  max-width: 52ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
}

.btn.primary {
  background: var(--accent);
  color: #0b0f14;
}

.btn.primary:hover {
  background: #7ab0ff;
  text-decoration: none;
}

.btn.ghost {
  border: 1px solid var(--border);
  color: var(--text);
}

.btn.ghost:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
}

.section {
  margin-bottom: 2.5rem;
}

.section h2 {
  font-size: 1.35rem;
  margin: 0 0 0.35rem;
}

.section-desc {
  color: var(--muted);
  margin: 0 0 1.25rem;
}

.card-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  transition: border-color 0.15s ease;
}

.card:hover {
  border-color: var(--accent-dim);
}

.card-num {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 600;
}

.card h3 {
  font-size: 1rem;
  margin: 0.35rem 0 0.5rem;
  line-height: 1.35;
}

.card h3 a {
  color: var(--text);
  text-decoration: none;
}

.card h3 a:hover {
  color: var(--accent);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.65rem;
}

.tag {
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: #1e2a3d;
  color: var(--muted);
}

.data-list {
  color: var(--muted);
  padding-left: 1.2rem;
}

.data-list code {
  font-family: var(--mono);
  font-size: 0.88em;
  color: var(--text);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}