.study-guide-page{min-height:100vh;background:linear-gradient(135deg,#f8fafc,#f1f5f9);padding:2rem 1rem}.guide-container{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:280px 1fr;gap:2.5rem}.guide-sidebar{background:#fff;border-radius:16px;padding:1.5rem;box-shadow:0 4px 20px #00000014;height:fit-content;position:sticky;top:2rem}.guide-sidebar h3{color:var(--primary-dark);font-size:1.5rem;margin-bottom:1.5rem;padding-bottom:.75rem;border-bottom:2px solid #e2e8f0}.subject-list{list-style:none;padding:0;margin:0 0 2rem}.subject-list li{margin-bottom:.75rem;border-radius:10px;overflow:hidden;transition:all .2s ease}.subject-list li:hover{background:#f1f5f9}.subject-list li.active{background:var(--primary-dark)}.subject-list li.active a{color:#fff}.subject-list li.active .subject-desc{color:#ffffffe6}.subject-list a{display:block;padding:.75rem 1rem;color:#334155;text-decoration:none;font-weight:500;transition:color .2s ease}.subject-list a:hover{color:var(--primary-dark)}.subject-desc{display:block;font-size:.85rem;color:#64748b;margin-top:.25rem;line-height:1.4}.sidebar-resources{border-top:1px solid #e2e8f0;padding-top:1.5rem}.sidebar-resources h4{color:#475569;font-size:1.1rem;margin-bottom:1rem}.sidebar-resources ul{list-style:none;padding:0;margin:0}.sidebar-resources li{margin-bottom:.5rem}.sidebar-resources a{color:#475569;text-decoration:none;font-size:.95rem;transition:color .2s ease}.sidebar-resources a:hover{color:var(--primary-dark);text-decoration:underline}.guide-content{background:#fff;border-radius:16px;padding:2rem;box-shadow:0 4px 20px #00000014}.guide-html-content h1{color:#1e293b;font-size:2.25rem;margin-bottom:1rem;line-height:1.2}.guide-html-content h2{color:var(--primary-dark);font-size:1.75rem;margin:2rem 0 1rem;padding-bottom:.5rem;border-bottom:2px solid #e2e8f0}.guide-html-content h3{color:#334155;font-size:1.5rem;margin:1.5rem 0 .75rem}.guide-intro{font-size:1.1rem;line-height:1.7;color:#475569;margin-bottom:2rem;padding:1rem;background:#f8fafc;border-radius:10px;border-left:4px solid var(--primary-dark)}.guide-section{margin-bottom:2.5rem;padding-bottom:1.5rem;border-bottom:1px solid #e2e8f0}.guide-section:last-child{border-bottom:none}.guide-section p{line-height:1.7;color:#475569;margin-bottom:1rem}.guide-section ul,.guide-section ol{padding-left:1.5rem;margin-bottom:1.5rem}.guide-section li{margin-bottom:.75rem;line-height:1.6;color:#475569}.guide-section strong{color:#1e293b;font-weight:600}.practice-links{display:flex;gap:1rem;margin-top:1.5rem;flex-wrap:wrap}.practice-btn{display:inline-block;padding:.75rem 1.5rem;background:var(--primary-dark);color:#fff;text-decoration:none;border-radius:8px;font-weight:600;transition:all .2s ease}.practice-btn:hover{background:#1e3a8a;transform:translateY(-2px);box-shadow:0 4px 12px #1e40af4d}.practice-btn.secondary{background:#f1f5f9;color:#475569;border:1px solid #cbd5e1}.practice-btn.secondary:hover{background:#e2e8f0;color:#334155}.related-subjects{margin-top:3rem;padding-top:2rem;border-top:2px solid #e2e8f0}.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;margin-top:1.5rem}.related-card{background:#f8fafc;border-radius:12px;padding:1.5rem;border:1px solid #e2e8f0;transition:all .2s ease}.related-card:hover{transform:translateY(-4px);box-shadow:0 8px 20px #0000001a;border-color:var(--primary-dark)}.related-card h4{color:var(--primary-dark);margin-bottom:.75rem;font-size:1.25rem}.related-card p{color:#64748b;font-size:.95rem;line-height:1.5;margin-bottom:1rem}.related-link{color:var(--primary-dark);text-decoration:none;font-weight:600;font-size:.95rem;display:inline-flex;align-items:center;gap:.5rem}.related-link:hover{text-decoration:underline}@media (max-width: 992px){.guide-container{grid-template-columns:1fr;gap:2rem}.guide-sidebar{position:static}.related-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}}@media (max-width: 768px){.study-guide-page{padding:1rem}.guide-content{padding:1.5rem}.guide-html-content h1{font-size:1.75rem}.guide-html-content h2{font-size:1.5rem}.practice-links{flex-direction:column}.practice-btn{width:100%;text-align:center}.related-grid{grid-template-columns:1fr}}@media print{.study-guide-page{background:#fff;padding:0}.guide-sidebar,.practice-links,.related-subjects{display:none}.guide-container{grid-template-columns:1fr;gap:0}.guide-content{box-shadow:none;padding:0}.guide-section{page-break-inside:avoid}}