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#0006}.video-container iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:none}.lesson-markdown{line-height:1.8;font-size:1rem;color:var(--text-primary)}.lesson-markdown h1{font-size:1.8rem;font-weight:800;margin:2.5rem 0 1rem;color:var(--text-primary);letter-spacing:-.02em}.lesson-markdown h2{font-size:1.4rem;font-weight:700;margin:2rem 0 .8rem;color:var(--accent);border-bottom:1px solid var(--glass-border);padding-bottom:.5rem}.lesson-markdown h3{font-size:1.15rem;font-weight:700;margin:1.5rem 0 .6rem;color:var(--text-primary)}.lesson-markdown p{margin-bottom:1.1rem}.lesson-markdown ul,.lesson-markdown ol{margin:.8rem 0;padding-left:1.5rem}.lesson-markdown li{margin-bottom:.4rem}.lesson-markdown li::marker{color:var(--accent)}.lesson-markdown code{background:var(--bg-code);padding:.18rem .45rem;border-radius:4px;font-size:.88em;color:var(--accent);font-family:JetBrains Mono,Fira Code,monospace;border:1px solid var(--border-subtle)}.lesson-markdown 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rgba(0,170,255,.2)}.lesson-nav{display:flex;justify-content:space-between;gap:1rem;margin-top:2rem}.btn-nav{display:flex;align-items:center;gap:.6rem;padding:.9rem 1.2rem;background:var(--glass-bg);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:var(--radius-sm);transition:all var(--transition);max-width:48%;min-height:44px}.btn-nav:hover{border-color:#00aaff4d;background:var(--accent-glow);transform:translateY(-2px);box-shadow:0 4px 15px #00aaff14}.btn-nav div{display:flex;flex-direction:column}.btn-nav small{font-size:.7rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;font-weight:600;font-family:JetBrains Mono,monospace}.btn-nav span{font-size:.9rem;font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.btn-prev{text-align:left}.btn-next{text-align:right;margin-left:auto}.my-courses-page{max-width:1400px;margin:0 auto;padding:2.5rem 1.5rem}.enrolled-card{background:var(--glass-bg);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:var(--radius);overflow:hidden;transition:all var(--transition)}.enrolled-card:hover{border-color:#00aaff4d;transform:translateY(-4px);box-shadow:0 8px 30px #00aaff0f}.enrolled-card-top{display:block;height:160px;overflow:hidden;background:linear-gradient(135deg,#00aaff08,#00d4ff05,#00aaff03)}.enrolled-card-top img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition)}.enrolled-card:hover .enrolled-card-top img{transform:scale(1.05)}.enrolled-card-body{padding:1.25rem;display:flex;flex-direction:column;gap:.8rem}.enrolled-card-body h3{font-size:1.05rem;font-weight:700;color:var(--text-primary);line-height:1.3;transition:color var(--transition)}.enrolled-card-body a:hover h3{color:var(--accent)}.btn-continue{width:fit-content;padding:.5rem 1.2rem;font-size:.88rem}@media(max-width:1024px){.course-hero{grid-template-columns:1fr 340px;gap:2rem;padding:1.5rem}.course-grid,.loading-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}.lesson-viewer{grid-template-columns:260px 1fr}}@media(max-width:768px){body{overflow-x:hidden}.course-hero{grid-template-columns:1fr;padding:1.25rem}.course-hero-thumb{order:-1;max-height:240px}.course-hero-info h1{font-size:1.6rem}.lesson-viewer{grid-template-columns:1fr}.lesson-sidebar{position:fixed;top:64px;left:0;width:300px;max-height:200px;overflow-y:auto;z-index:50;box-shadow:4px 0 30px #0009;background:var(--bg-tertiary)}.sidebar-closed .lesson-sidebar{transform:translate(-100%)}.lesson-main{padding:2rem 1.25rem}.main-content{padding:16px}.navbar-inner{padding:0 16px;gap:1rem}.navbar-links{display:none}.navbar-hamburger,.navbar-mobile-menu{display:flex}.navbar-user{display:none}.catalog-page{padding:1.5rem 1rem}.catalog-header h1{font-size:1.6rem}.course-grid{grid-template-columns:1fr;gap:16px}.loading-grid{grid-template-columns:1fr}.catalog-filters{flex-direction:column;align-items:stretch}.search-box{min-width:unset}.filter-group{flex-wrap:wrap}.lesson-nav{flex-direction:column}.btn-nav{max-width:100%}.course-detail-page{padding:1rem}.my-courses-page{padding:1.5rem 1rem}}@media(max-width:480px){.catalog-page{padding:1rem .75rem}.catalog-header h1{font-size:1.35rem}.catalog-header p{font-size:.9rem}.course-grid,.loading-grid{grid-template-columns:1fr}.lesson-main{padding:1.25rem .75rem}.lesson-title-main{font-size:1.3rem}.lesson-markdown{font-size:.95rem}.lesson-markdown pre{padding:1rem;border-radius:var(--radius-sm);margin-left:-.75rem;margin-right:-.75rem;border-radius:0}.navbar-brand span,.user-info span,.btn-logout span{display:none}.navbar-inner{padding:0 .75rem;height:56px}.course-hero{padding:1rem;margin-bottom:2rem}.course-hero-info h1{font-size:1.35rem}.course-stats{gap:.8rem}.course-stats span{font-size:.78rem}.btn-enroll{width:100%;justify-content:center}.lesson-sidebar{width:85vw;max-width:300px}.lesson-breadcrumbs{font-size:.7rem}.video-container{margin-left:-.75rem;margin-right:-.75rem;border-radius:0;border-left:none;border-right:none}.lesson-markdown table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}.my-courses-page,.course-detail-page{padding:1rem .75rem}.enrolled-card-top{height:140px}.course-card-thumb,.course-card-image{height:160px}.thumb-placeholder-large{height:200px}.btn-nav{padding:.75rem 1rem}.lesson-item{padding:.75rem 1rem;flex-wrap:wrap;gap:.5rem}}.reviews-section{margin-top:32px;padding-top:24px;border-top:1px solid rgba(255,255,255,.05)}.reviews-section h3{margin-bottom:8px}.avg-rating{color:#fa0;font-size:18px;margin-bottom:16px}.review-form{background:#ffffff05;padding:16px;border-radius:8px;margin-bottom:24px}.star-select{display:flex;gap:4px;margin-bottom:8px}.star-select button{background:none;border:none;font-size:24px;color:#444;cursor:pointer}.star-select button.star-active{color:#fa0}.review-form textarea{width:100%;margin-bottom:8px;min-height:60px}.review-item{padding:12px 0;border-bottom:1px solid rgba(255,255,255,.05)}.review-header{display:flex;justify-content:space-between;margin-bottom:4px}.review-header span{color:#fa0}.review-item p{color:var(--text-secondary);font-size:14px;margin:4px 0}.review-item small{color:#666}@media screen and (max-width:768px){html,body{overflow-x:hidden!important;width:100%!important}.main-content{padding:16px!important}.navbar-inner{padding:0 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24px;display:flex;flex-direction:column;align-items:center;text-align:center;gap:4px;transition:all .3s ease}.certificate-card:hover{border-color:#00aaff4d;background:#00aaff08;transform:translateY(-3px);box-shadow:0 8px 24px #0000004d}.certificate-icon{width:52px;height:52px;border-radius:50%;background:#00aaff1a;display:flex;align-items:center;justify-content:center;color:#0af;margin-bottom:14px}.certificate-info{display:flex;flex-direction:column;align-items:center;gap:6px;margin-bottom:18px}.certificate-title{font-size:16px;font-weight:600;color:var(--text-primary, #e0e0e0);line-height:1.3}.certificate-id{font-size:12px;font-family:JetBrains Mono,monospace;color:#666;background:#ffffff0a;padding:3px 10px;border-radius:4px}.certificate-date{font-size:12px;color:#888}.certificate-download-btn{width:100%;padding:10px 20px;border:none;border-radius:10px;background:linear-gradient(135deg,#0af,#08d);color:#fff;font-size:14px;font-weight:600;cursor:pointer;transition:all .3s ease;margin-top:auto}.certificate-download-btn:hover{box-shadow:0 4px 16px #00aaff4d;transform:translateY(-1px)}.certificate-download-btn:active{transform:translateY(0)}@media screen and (max-width:768px){.certificates-grid{grid-template-columns:1fr;gap:14px}.certificate-card{padding:22px 18px;border-radius:12px}}@media screen and (max-width:375px){html{font-size:13px}.main-content{padding:12px!important}.navbar-inner{padding:0 10px!important}.navbar-brand{font-size:13px!important;gap:5px!important}.navbar-brand img{width:22px!important;height:22px!important}.catalog-header h1{font-size:18px!important}.catalog-header p{font-size:12px!important}.course-card-image{height:120px!important}.course-card-body h3{font-size:14px!important}.course-card-body p{font-size:12px!important}.course-card-meta{font-size:11px!important;gap:8px!important}.lesson-sidebar{max-height:160px!important}.lesson-markdown{padding:12px!important;font-size:14px!important}.lesson-markdown h1{font-size:20px!important}.lesson-markdown h2{font-size:17px!important}.lesson-markdown pre{padding:10px!important;font-size:12px!important;overflow-x:auto!important}.certificates-grid{gap:12px!important}.certificate-card{padding:20px 16px!important}.certificate-title{font-size:14px!important}.certificate-download-btn{padding:8px 16px!important;font-size:13px!important}.reviews-section{margin-top:20px!important}.star-select button{font-size:20px!important}.btn{padding:8px 12px!important;font-size:12px!important}.card{border-radius:8px!important}.empty-state{padding:32px 16px!important}.empty-state h3{font-size:16px!important}img{max-width:100%!important}pre,code{word-wrap:break-word!important;overflow-wrap:break-word!important}}