.lang > div{max-height:min(70vh,520px);min-width:190px;overflow-y:auto;grid-template-columns:1fr 1fr}.lang > div a{text-transform:none;white-space:nowrap}
[dir="rtl"] body{text-align:right}[dir="rtl"] .site-header{direction:rtl}[dir="rtl"] .site-header nav{margin-left:0;margin-right:auto}[dir="rtl"] .lang > div{right:auto;left:0}[dir="rtl"] .section-head,[dir="rtl"] .cta,[dir="rtl"] .download-list article{direction:rtl}[dir="rtl"] .content blockquote{border-left:0;border-right:4px solid var(--blue)}
@media(max-width:780px){.lang > div{position:fixed;top:68px;right:12px;left:12px;grid-template-columns:1fr 1fr;max-height:60vh}}
.knowledge-pillars{display:grid;grid-template-columns:1fr 1fr;gap:28px}.knowledge-pillar{overflow:hidden;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:0 20px 60px #06234312}.knowledge-pillar>header{padding:38px;color:#fff;background:linear-gradient(145deg,#061a33,#0b4f91)}.knowledge-pillar>header small{color:#56c9ff;font-weight:900;letter-spacing:.16em}.knowledge-pillar>header h2{font-size:34px;line-height:1.18;margin:9px 0}.knowledge-pillar>header p{color:#d4e2f1}.knowledge-pillar>div{display:grid;padding:12px 28px 28px}.knowledge-pillar>div a{display:grid;grid-template-columns:44px 1fr auto;align-items:center;gap:13px;padding:16px 0;border-bottom:1px solid var(--line)}.knowledge-pillar>div a>span{color:#1685ff;font-weight:900}.knowledge-pillar>div a>b{line-height:1.35}.knowledge-pillar>div a>small{color:var(--muted);white-space:nowrap}.topic-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.topic-card{display:grid;grid-template-columns:50px 1fr;gap:18px;padding:25px;border:1px solid var(--line);border-radius:12px;background:#fff;transition:.2s}.topic-card:hover{transform:translateY(-3px);border-color:#1685ff;box-shadow:0 16px 42px #0b498b18}.topic-card>span{font-size:22px;color:#1685ff;font-weight:900}.topic-card h3{margin:0 0 7px;font-size:20px}.topic-card p{margin:0 0 8px;color:var(--muted)}.topic-card small{color:#0878e8;font-weight:800}.article-nav{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;max-width:1000px;margin:70px auto 0}.article-nav a{display:grid;gap:6px;padding:20px;border:1px solid var(--line);border-radius:10px;background:var(--paper)}.article-nav small{color:#0878e8;font-weight:800}.article-nav b{font-size:14px;line-height:1.4}.article-nav .course-link{background:linear-gradient(145deg,#061a33,#0a4b88);color:#fff}.empty-state{padding:38px;border:1px dashed var(--line);border-radius:10px;color:var(--muted);text-align:center}
@media(max-width:900px){.knowledge-pillars,.topic-grid{grid-template-columns:1fr}.article-nav{grid-template-columns:1fr}.knowledge-pillar>div a{grid-template-columns:38px 1fr}.knowledge-pillar>div a>small{grid-column:2}}