/* ──────────────────────────────────────────────────────────────────────────
   TNO Atlas — long-form content pages (Giới thiệu, Điều khoản)
   Feature-article layout: kicker → headline → dek, sticky "Mục lục" sidebar,
   numbered sections, drop-cap lead. Uses tokens from atlas-theme.css.
   ────────────────────────────────────────────────────────────────────────── */

.atlas-article {
  max-width: 1120px;
  margin: 0 auto;
  padding: 48px 20px 72px;
}

.atlas-article-kicker,
.atlas-article .kicker {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
}

.atlas-article-head {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 40px;
  padding-bottom: 28px;
  border-bottom: 3px double var(--ink);
}

.atlas-article-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 7vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  margin: 12px 0 16px;
  text-wrap: balance;
}
.atlas-article-title em { font-weight: 400; color: var(--accent); }

.atlas-article-dek {
  font-family: var(--font-body);
  font-style: italic;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 640px;
  margin: 0 auto;
}

.atlas-article-meta {
  margin-top: 18px;
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* Two-column body: sticky contents + text column */
.atlas-article-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
@media (min-width: 960px) {
  .atlas-article-grid { grid-template-columns: 220px minmax(0, 680px); justify-content: center; gap: 64px; }
}

.atlas-toc {
  align-self: start;
  border-top: 2px solid var(--ink);
  padding-top: 10px;
}
@media (min-width: 960px) {
  .atlas-toc { position: sticky; top: 24px; }
}
.atlas-toc ol { list-style: none; margin: 10px 0 0; padding: 0; }
.atlas-toc li { border-top: 1px dotted var(--rule); }
.atlas-toc a {
  display: grid;
  grid-template-columns: 28px 1fr;
  padding: 8px 0;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink-2);
  text-decoration: none;
  transition: color 0.12s;
}
.atlas-toc a span { font-family: var(--font-ui); font-size: 10px; font-weight: 800; color: var(--accent); padding-top: 3px; }
.atlas-toc a:hover { color: var(--accent); }

/* Text column */
.atlas-prose {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.78;
  color: var(--ink);
}
.atlas-prose > .lead::first-letter {
  float: left;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 4.4em;
  line-height: 0.8;
  padding: 8px 10px 0 0;
  color: var(--accent);
}
.atlas-prose p { margin: 0 0 1.1em; }
.atlas-prose a { color: var(--accent); text-underline-offset: 3px; }
.atlas-prose strong { font-weight: 700; }

.atlas-prose section { scroll-margin-top: 24px; margin-top: 44px; }
.atlas-prose h2 {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 32px);
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 16px;
  padding-top: 14px;
  border-top: 1px solid var(--ink);
}
.atlas-prose h2 span {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--accent);
}
.atlas-prose h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  margin: 24px 0 8px;
}

.atlas-prose ul, .atlas-prose ol { margin: 0 0 1.2em; padding-left: 1.3em; }
.atlas-prose li { margin-bottom: 0.45em; }
.atlas-prose li::marker { color: var(--accent); }

/* Pull quote */
.atlas-pullquote {
  margin: 36px 0;
  padding: 18px 0;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1.35;
  text-align: center;
  color: var(--ink);
}
.atlas-pullquote::before { content: '“'; color: var(--accent); }
.atlas-pullquote::after  { content: '”'; color: var(--accent); }

/* Fact box / sidebar note */
.atlas-box {
  margin: 28px 0;
  padding: 18px 20px;
  background: var(--paper-2);
  border-left: 3px solid var(--accent);
  font-size: 16px;
  line-height: 1.65;
}
.atlas-box .kicker { display: block; margin-bottom: 6px; }
.atlas-box p:last-child { margin-bottom: 0; }

/* Legend rows (pin colours, eras) */
.atlas-legend { list-style: none; padding: 0 !important; margin: 0 0 1.2em; }
.atlas-legend li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 10px;
  align-items: baseline;
  padding: 8px 0;
  border-top: 1px dotted var(--rule);
  margin: 0;
}
.atlas-legend li::marker { content: none; }
.atlas-dot {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--paper);
  box-shadow: 0 0 0 1px var(--rule);
  transform: translateY(2px);
}

/* Q&A */
.atlas-faq dt {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  margin-top: 18px;
}
.atlas-faq dd { margin: 4px 0 0; color: var(--ink-2); }

/* Call to action */
.atlas-cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.atlas-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border: 1px solid var(--ink);
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none !important;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.atlas-btn:hover { background: var(--paper-2); }
.atlas-btn.primary { background: var(--ink); color: var(--paper); }
.atlas-btn.primary:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

.atlas-endmark { text-align: center; color: var(--accent); margin-top: 48px; }