:root {
  --bg: #0b0a1f;
  --bg-soft: #14123a;
  --surface: #1b1848;
  --surface-2: #241f5c;
  --border: #322c74;
  --text: #ece9ff;
  --text-muted: #a9a3d6;
  --primary: #8b6cff;
  --primary-2: #c084fc;
  --accent: #ffd166;
  --accent-2: #4cc9f0;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --container: 1180px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 600px at 20% -10%, #2a1e6b 0%, transparent 60%),
              radial-gradient(900px 500px at 90% 0%, #1a3a6b 0%, transparent 55%),
              var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary-2); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--accent); }

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .6em; font-weight: 700; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.8rem, 3.2vw, 2.6rem); }
h2 { font-size: clamp(1.4rem, 2.4vw, 1.9rem); margin-top: 1.6em; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }
.muted { color: var(--text-muted); }
.lead { color: var(--text-muted); font-size: 1.05rem; max-width: 720px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 10, 31, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 20px; }
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 1.15rem; }
.logo-mark { color: var(--accent); font-size: 1.4rem; }

.main-nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 4px 14px; margin: 0; padding: 0; }
.main-nav a { color: var(--text-muted); font-size: .92rem; padding: 6px 4px; border-radius: 6px; }
.main-nav a:hover { color: var(--text); background: var(--surface); }

.menu-toggle {
  display: none; background: transparent; color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; font-size: 1.1rem; cursor: pointer;
}

/* Breadcrumbs */
.breadcrumbs { font-size: .85rem; color: var(--text-muted); padding: 16px 0 8px; }
.breadcrumbs a { color: var(--text-muted); }
.breadcrumbs a:hover { color: var(--accent); }
.breadcrumbs span { margin: 0 6px; }

/* Hero */
.hero { padding: 40px 0 24px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; }

.btn {
  display: inline-block; padding: 12px 20px; border-radius: 999px;
  font-weight: 600; font-size: .95rem; transition: transform .15s ease, background .15s ease;
}
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { transform: translateY(-1px); color: #fff; }
.btn-ghost { border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { background: var(--surface); color: var(--text); }

/* Widgets */
.widgets { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 24px 0 40px; }
.widget {
  background: linear-gradient(160deg, var(--surface), var(--bg-soft));
  border: 1px solid var(--border); border-radius: var(--radius); padding: 20px;
}
.widget h3 { margin-bottom: .4em; }
.widget p { color: var(--text-muted); font-size: .95rem; }

.link-arrow { color: var(--accent); font-weight: 600; font-size: .92rem; }
.link-arrow:hover { color: var(--primary-2); }

/* Clusters */
.cluster-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.cluster-card {
  display: block; padding: 20px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text); transition: transform .15s ease, border-color .15s ease, background .15s ease;
}
.cluster-card:hover { transform: translateY(-2px); border-color: var(--primary); background: var(--surface-2); color: var(--text); }
.cluster-card h3 { margin-bottom: .35em; }
.cluster-card p { color: var(--text-muted); font-size: .92rem; margin-bottom: .8em; }

/* Articles */
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.article-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; display: flex; flex-direction: column; gap: 8px;
}
.article-card h3 { margin: 0; font-size: 1.05rem; }
.article-card h3 a { color: var(--text); }
.article-card h3 a:hover { color: var(--accent); }
.article-card p { color: var(--text-muted); font-size: .92rem; margin: 0; }
.article-card time { color: var(--text-muted); font-size: .8rem; margin-top: auto; }

.tag {
  display: inline-block; align-self: flex-start;
  background: rgba(139, 108, 255, 0.15); color: var(--primary-2);
  border: 1px solid rgba(139, 108, 255, 0.35);
  padding: 3px 10px; border-radius: 999px; font-size: .75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .04em;
}

/* Article page */
.article { max-width: 780px; margin: 0 auto; padding: 8px 0 40px; }
.article-header { margin-bottom: 24px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 16px; color: var(--text-muted); font-size: .88rem; }
.article-body { font-size: 1.05rem; }
.article-body h2 { margin-top: 1.6em; }
.article-body p { margin: 0 0 1.1em; }
.article-body ul, .article-body ol { padding-left: 1.4em; }
.article-body blockquote {
  border-left: 3px solid var(--primary); padding: 8px 16px; margin: 1.2em 0;
  background: var(--surface); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-muted);
}

.related { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); }
.related-list { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 20px; }
.related-list a { color: var(--text); }
.related-list a:hover { color: var(--accent); }

/* Category page */
.category-header { padding: 8px 0 16px; }
.subcategories { margin-bottom: 32px; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); margin-top: 60px; padding: 40px 0 24px; background: rgba(11, 10, 31, 0.6); }
.footer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer-col h4 { color: var(--text); margin-bottom: .8em; font-size: .95rem; text-transform: uppercase; letter-spacing: .06em; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 6px; }
.footer-col a { color: var(--text-muted); font-size: .9rem; }
.footer-col a:hover { color: var(--accent); }
.footer-col p { color: var(--text-muted); font-size: .9rem; }

/* Responsive */
@media (max-width: 1024px) {
  .cluster-grid { grid-template-columns: repeat(2, 1fr); }
  .article-grid { grid-template-columns: repeat(2, 1fr); }
  .widgets { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .menu-toggle { display: inline-block; }
  .main-nav { display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--bg-soft); border-bottom: 1px solid var(--border); padding: 12px 20px; }
  body.nav-open .main-nav { display: block; }
  .main-nav ul { flex-direction: column; gap: 4px; }
  .main-nav a { display: block; padding: 10px 8px; }

  .cluster-grid, .article-grid, .related-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .hero { padding: 24px 0 16px; }
  .article-body { font-size: 1rem; }
}