/* ─── Tích Đức Online — Landing Pages CSS ─── */
:root {
  --bg-from: #1a1410;
  --bg-to: #0d0907;
  --text: #e8d8b8;
  --text-dim: #a89580;
  --accent: #d4a857;
  --accent-bright: #f0d28e;
  --accent-dim: #a87b54;
  --card: rgba(40, 28, 18, 0.6);
  --border: rgba(212, 168, 87, 0.18);
}
* { box-sizing: border-box; }
body {
  margin: 0; padding: 0;
  background: linear-gradient(180deg, var(--bg-from) 0%, var(--bg-to) 100%);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 16px; line-height: 1.7;
  min-height: 100vh;
}
.blog-topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 24px;
  background: rgba(20, 14, 8, 0.85);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.blog-brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--accent-bright);
  font-family: 'Noto Serif', serif; font-weight: 700; font-size: 19px;
}
.brand-mark { font-size: 22px; }
.blog-nav { display: flex; align-items: center; gap: 18px; }
.blog-nav a {
  text-decoration: none; color: var(--text-dim);
  font-weight: 500; font-size: 14px; transition: color 0.2s;
}
.blog-nav a:hover, .blog-nav a.active { color: var(--accent-bright); }
.blog-nav a.cta {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dim) 100%);
  color: #1a1410; padding: 8px 16px; border-radius: 999px; font-weight: 600;
}
.landing-hero {
  text-align: center; padding: 64px 24px 32px;
  max-width: 800px; margin: 0 auto;
}
.landing-hero h1 {
  font-family: 'Noto Serif', serif;
  font-size: 44px; line-height: 1.15;
  color: var(--accent-bright); margin: 0 0 18px;
}
.landing-hero .lede {
  font-size: 19px; color: var(--text); margin-bottom: 32px;
}
.blog-article {
  max-width: 760px; margin: 0 auto;
  padding: 0 24px 60px;
}
.blog-article section { margin-bottom: 36px; }
.blog-article h2 {
  font-family: 'Noto Serif', serif;
  font-size: 26px; color: var(--accent-bright);
  margin: 32px 0 14px; font-weight: 700; line-height: 1.3;
}
.blog-article h3 {
  font-family: 'Noto Serif', serif;
  font-size: 20px; color: var(--accent);
  margin: 26px 0 10px; font-weight: 600;
}
.blog-article p { margin: 12px 0; }
.blog-article ul, .blog-article ol { margin: 12px 0 14px 22px; padding: 0; }
.blog-article li { margin: 6px 0; }
.blog-article strong { color: var(--accent-bright); font-weight: 600; }
.blog-article em { color: var(--text); font-style: italic; }
.blog-article a {
  color: var(--accent-bright); text-decoration: underline;
  text-decoration-color: rgba(240, 210, 142, 0.4);
  text-underline-offset: 3px;
}
.blog-article a:hover { text-decoration-color: var(--accent-bright); }
.rank-table-wrap { overflow-x: auto; margin: 16px 0; }
.rank-table {
  width: 100%; border-collapse: collapse; font-size: 14px;
  background: var(--card); border-radius: 10px; overflow: hidden;
}
.rank-table th, .rank-table td {
  padding: 10px 12px; text-align: left;
  border-bottom: 1px solid var(--border);
}
.rank-table th {
  background: rgba(212, 168, 87, 0.15);
  color: var(--accent-bright); font-weight: 600;
  font-size: 13px; text-transform: uppercase; letter-spacing: 0.5px;
}
.rank-table tr:last-child td { border-bottom: none; }
.rank-table tr:nth-child(even) td { background: rgba(0, 0, 0, 0.15); }
.cta-block {
  background: linear-gradient(135deg, rgba(212, 168, 87, 0.15), rgba(168, 123, 84, 0.1));
  border: 1px solid var(--border);
  border-radius: 16px; padding: 28px 24px;
  text-align: center; margin: 48px 0 32px;
}
.cta-block h2 { margin-top: 0; font-size: 22px; color: var(--accent-bright); }
.cta-block p { color: var(--text); margin-bottom: 20px; }
.cta-big {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dim) 100%);
  color: #1a1410 !important;
  padding: 14px 32px; border-radius: 999px;
  font-size: 16px; font-weight: 700;
  text-decoration: none !important;
  box-shadow: 0 4px 18px rgba(212, 168, 87, 0.3);
  transition: transform 0.2s, box-shadow 0.2s;
}
.cta-big:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(212, 168, 87, 0.45);
}
.cta-foot {
  font-size: 13px; color: var(--text-dim) !important;
  margin-top: 14px !important; margin-bottom: 0 !important;
}
.article-foot {
  margin-top: 48px; padding-top: 24px;
  border-top: 1px solid var(--border);
}
.article-foot h3 { font-size: 17px; margin-top: 0; }
.related { list-style: none; margin-left: 0 !important; padding: 0; }
.related li {
  padding: 10px 0;
  border-bottom: 1px solid rgba(212, 168, 87, 0.08);
}
.related li:last-child { border-bottom: none; }
.related a { display: block; color: var(--accent-bright); font-weight: 500; }
.blog-footer {
  text-align: center; padding: 32px 24px;
  border-top: 1px solid var(--border);
  color: var(--text-dim); font-size: 13px;
}
.blog-footer a { color: var(--accent); text-decoration: none; }
@media (max-width: 640px) {
  .blog-topbar { padding: 12px 16px; }
  .blog-nav a { font-size: 13px; }
  .blog-nav a.cta { padding: 6px 12px; font-size: 13px; }
  .blog-article { padding: 0 16px 40px; }
  .blog-article h2 { font-size: 22px; }
  .blog-article h3 { font-size: 17px; }
  .landing-hero h1 { font-size: 32px; }
  .landing-hero { padding: 40px 16px 24px; }
}