:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --text: #111827;
  --muted: #667085;
  --line: #e5e7eb;
  --accent: #3b82f6;
  --accent-soft: #eaf2ff;
  --shadow: 0 16px 40px rgba(15, 23, 42, 0.06);
  --radius: 20px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f8fbff 0%, #f6f8fb 100%);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.container { width: min(calc(100% - 32px), var(--max)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(248, 251, 255, 0.82);
  border-bottom: 1px solid rgba(229, 231, 235, 0.7);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 74px;
}

.brand {
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: 1.05rem;
}

.brand span { color: var(--accent); }

.nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav a {
  padding: 10px 14px;
  color: var(--muted);
  border-radius: 999px;
}

.nav a:hover,
.nav a.active {
  color: var(--text);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero {
  padding: 56px 0 24px;
}

.hero-grid,
.section-grid,
.feature-grid,
.category-layout,
.footer-grid {
  display: grid;
  gap: 24px;
}

.hero-grid {
  grid-template-columns: 1.35fr 0.9fr;
  align-items: stretch;
}

.hero-card,
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 32px;
}

.hero-card h1,
.page-hero h1 {
  margin: 10px 0 14px;
  font-size: clamp(2.2rem, 4vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.hero-card p,
.page-hero p,
.card p {
  color: var(--muted);
  line-height: 1.65;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 700;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 18px;
  border-radius: 14px;
  font-weight: 700;
  border: 1px solid var(--line);
}

.btn-primary {
  background: var(--text);
  color: white;
  border-color: var(--text);
}

.btn-secondary {
  background: var(--surface);
}

.hero-side {
  padding: 24px;
  display: grid;
  gap: 16px;
}

.stat {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(180deg, #fff 0%, #fbfdff 100%);
}

.stat strong {
  display: block;
  font-size: 1.6rem;
  margin-bottom: 6px;
}

.section {
  padding: 18px 0 22px;
}

.section-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.section-header h2 {
  margin: 0;
  font-size: 1.5rem;
  letter-spacing: -0.03em;
}

.section-header p {
  margin: 0;
  color: var(--muted);
}

.section-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-grid {
  grid-template-columns: 1.1fr 0.9fr;
}

.category-layout {
  grid-template-columns: 1fr;
}

.page-hero {
  padding: 56px 0 18px;
}

.page-hero-card {
  padding: 28px 30px;
}

.card {
  padding: 22px;
}

.meta-row,
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 7px 11px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
}

.date,
.source,
.section-link,
.footer-note,
.card-footer a {
  color: var(--muted);
  font-size: 0.94rem;
}

.article-card h3,
.preview-card h3,
.featured-text h2 {
  margin: 14px 0 10px;
  letter-spacing: -0.03em;
}

.article-card h3 {
  font-size: 1.12rem;
  line-height: 1.3;
}

.mini-item + .mini-item {
  border-top: 1px solid var(--line);
  margin-top: 16px;
  padding-top: 16px;
}

.source-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.source-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  background: #fafcff;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.callout {
  padding: 18px 20px;
  border-radius: 18px;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: white;
}

.callout p,
.callout .footer-note { color: rgba(255,255,255,0.78); }

.site-footer {
  padding: 24px 0 44px;
}

.footer-grid {
  grid-template-columns: 1fr auto;
  align-items: center;
}

@media (max-width: 960px) {
  .hero-grid,
  .feature-grid,
  .section-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .header-inner,
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 14px 0;
  }
}

@media (max-width: 640px) {
  .hero-card,
  .hero-side,
  .card,
  .page-hero-card { padding: 20px; }
  .nav { gap: 6px; }
  .nav a { padding: 8px 10px; }
}