:root {
  --bg: #0b0f12;
  --panel: #141a20;
  --panel-soft: rgba(255, 255, 255, 0.03);
  --text: #eaf0f5;
  --muted: #b8c2cc;
  --line: #2a333d;
  --link: #8fd3ff;
  --accent: #b9ffca;
  --max-width: 960px;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: linear-gradient(180deg, #0b0f12, #111821);
  color: var(--text);
  line-height: 1.72;
}

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

main {
  max-width: var(--max-width);
  margin: 28px auto;
  padding: 0 16px 32px;
}

.shell {
  background: rgba(20, 26, 32, 0.92);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
}

.top-links,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
}

.top-links {
  margin: 0 0 18px;
}

.footer-links {
  margin: 10px 0;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.76rem;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(1.8rem, 3.4vw, 3rem);
  line-height: 1.1;
}

h2 {
  margin: 28px 0 12px;
  font-size: 1.2rem;
}

h3 {
  margin: 20px 0 8px;
  font-size: 1rem;
}

p,
li {
  color: var(--muted);
}

.meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 6px 12px;
  margin: 0 0 16px;
}

.lede {
  max-width: 74ch;
  font-size: 1.02rem;
}

.article-grid {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.article-card,
.info-box,
.toc,
.key-points {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-soft);
  padding: 14px 16px;
}

.article-card h2,
.article-card h3,
.info-box h2,
.toc h2,
.key-points h2 {
  margin-top: 0;
}

.footer {
  margin-top: 26px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
  color: var(--muted);
  font-size: 0.92rem;
}

.sources {
  border-top: 1px solid var(--line);
  margin-top: 28px;
  padding-top: 18px;
}

.sources ul,
.key-points ul,
.toc ol {
  margin-bottom: 0;
}

.note {
  color: rgba(234, 240, 245, 0.82);
  font-size: 0.94rem;
}

@media (max-width: 768px) {
  main {
    padding: 0 12px 24px;
  }

  .shell {
    padding: 18px;
  }

  h1 {
    font-size: clamp(1.6rem, 8vw, 2.2rem);
  }
}