@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap";.header{z-index:100;height:var(--header-height);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-bottom:1px solid var(--border);background:#0f172ad9;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;height:100%;display:flex}.header-logo{align-items:center;gap:var(--space-sm);color:var(--text);font-size:1.3rem;font-weight:800;display:flex}.logo-icon{color:var(--primary);font-size:1.8rem}.logo-text{background:linear-gradient(135deg, var(--primary-light), var(--accent));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.header-nav{align-items:center;gap:var(--space-md);display:flex}.nav-link{border-radius:var(--radius);color:var(--text-secondary);transition:var(--transition);padding:6px 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0;margin-top:auto}.footer-inner{justify-content:space-between;align-items:center;display:flex}.footer-brand{align-items:center;gap:var(--space-sm);color:var(--text-secondary);font-size:.9rem;display:flex}.footer-icon{color:var(--primary);font-size:1.4rem}.footer-copy{color:var(--text-muted);font-size:.8rem}@media (width<=768px){.footer-inner{gap:var(--space-sm);text-align:center;flex-direction:column}}.course-card{cursor:pointer;flex-direction:column;text-decoration:none;display:flex}.course-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}.course-card-cover{background:linear-gradient(135deg, var(--bg-elevated), var(--border));height:180px;position:relative;overflow:hidden}.course-card-cover img{object-fit:cover;width:100%;height:100%}.course-card-placeholder{height:100%;color:var(--text-muted);justify-content:center;align-items:center;font-size:3rem;display:flex}.course-card-badge{position:absolute;top:12px;right:12px}.course-card-body{flex-direction:column;flex:1;display:flex}.course-card-category{color:var(--primary-light);text-transform:uppercase;letter-spacing:.05em;margin-bottom:var(--space-xs);font-size:.75rem;font-weight:600}.course-card-title{color:var(--text);margin-bottom:var(--space-sm);-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:1.05rem;font-weight:700;line-height:1.4;display:-webkit-box;overflow:hidden}.course-card-desc{color:var(--text-secondary);margin-bottom:var(--space-md);flex:1;font-size:.85rem;line-height:1.5}.course-card-meta{color:var(--text-muted);border-top:1px solid var(--border);padding-top:var(--space-md);justify-content:space-between;align-items:center;margin-top:auto;font-size:.8rem;display:flex}.course-card-author,.course-card-lessons{align-items:center;gap:4px;display:flex}.home{padding-bottom:var(--space-2xl)}.hero{padding:var(--space-3xl) 0;position:relative;overflow:hidden}.hero-bg{z-index:0;position:absolute;inset:0}.hero-orb{filter:blur(80px);opacity:.3;border-radius:50%;animation:8s ease-in-out infinite float;position:absolute}.hero-orb-1{background:var(--primary);width:400px;height:400px;top:-100px;right:-100px}.hero-orb-2{background:var(--accent);width:300px;height:300px;animation-delay:-3s;bottom:-50px;left:-50px}.hero-orb-3{background:#ec4899;width:200px;height:200px;animation-delay:-5s;top:50%;left:50%}.hero-content{z-index:1;text-align:center;max-width:700px;margin:0 auto;position:relative}.hero-badge{align-items:center;gap:var(--space-sm);border-radius:var(--radius-full);color:var(--primary-light);margin-bottom:var(--space-lg);background:#6366f126;border:1px solid #6366f14d;padding:6px 16px;font-size:.8rem;font-weight:600;display:inline-flex}.hero-title{margin-bottom:var(--space-md);background:linear-gradient(135deg, var(--text) 0%, var(--primary-light) 50%, var(--accent) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:3.5rem;font-weight:800;line-height:1.1}.hero-sub{color:var(--text-secondary);margin-bottom:var(--space-xl);font-size:1.2rem;line-height:1.7}.hero-actions{gap:var(--space-md);margin-bottom:var(--space-2xl);flex-wrap:wrap;justify-content:center;display:flex}.hero-stats{justify-content:center;gap:var(--space-2xl);display:flex}.hero-stat{align-items:center;gap:var(--space-sm);color:var(--text-secondary);font-size:.85rem;display:flex}.hero-stat svg{color:var(--primary-light);font-size:1.6rem}.hero-stat strong{color:var(--text);font-size:1.1rem;display:block}.section{padding:var(--space-2xl) 0}.categories-section,.categories-section .section-title{border-top:none!important}.categories-section:before,.categories-section:after,.categories-section .section-title:before,.categories-section .section-title:after{display:none!important}.home-courses-section{padding-bottom:var(--space-3xl)}.section-title{margin-bottom:var(--space-lg);font-size:1.6rem;font-weight:700}.section-header{margin-bottom:var(--space-lg);justify-content:space-between;align-items:center;display:flex}.section-header .section-title{margin-bottom:0}.categories-grid{gap:var(--space-md);grid-template-columns:repeat(auto-fill,minmax(180px,1fr));display:grid}.category-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-lg);text-align:center;transition:var(--transition);cursor:pointer}.category-card:hover{border-color:var(--primary);box-shadow:var(--shadow-glow);transform:translateY(-2px)}.category-name{color:var(--text);font-size:.95rem;font-weight:600}@media (width<=768px){.hero-title{font-size:2.2rem}.hero-stats{gap:var(--space-md);flex-direction:column;align-items:center}.categories-grid{grid-template-columns:repeat(2,1fr)}}.auth-page{padding:var(--space-2xl);justify-content:center;align-items:center;display:flex}.auth-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);width:100%;max-width:440px;animation:slideUp .4s var(--ease);overflow:hidden}.auth-header{padding:var(--space-xl) var(--space-xl) 0;text-align:center}.auth-title{color:var(--text);font-size:1.5rem;font-weight:800}.auth-subtitle{color:var(--primary-light);margin-top:var(--space-xs);font-size:.85rem;font-weight:600}.auth-form{padding:var(--space-xl)}.auth-error{background:var(--danger-light);color:#991b1b;border-radius:var(--radius);margin-bottom:var(--space-md);padding:10px 14px;font-size:.85rem}.auth-submit{width:100%;margin-top:var(--space-sm)}.auth-footer{text-align:center;padding:var(--space-md) var(--space-xl) var(--space-xl);color:var(--text-secondary);font-size:.9rem}.auth-footer a{color:var(--primary-light);font-weight:600}.auth-footer a:hover{text-decoration:underline}.form-row{gap:var(--space-md);grid-template-columns:1fr 1fr;display:grid}@media (width<=480px){.form-row{grid-template-columns:1fr}}.catalog-filters{gap:var(--space-md);margin-bottom:var(--space-xl);flex-wrap:wrap;display:flex}.search-box{flex:1;min-width:250px;position:relative}.search-icon{color:var(--text-muted);font-size:1.1rem;position:absolute;top:50%;left:14px;transform:translateY(-50%)}.search-input{padding-left:40px!important}.filter-select{width:auto;min-width:160px}.catalog-empty{text-align:center;padding:var(--space-3xl);color:var(--text-secondary);font-size:1.1rem}@media (width<=768px){.catalog-filters{flex-direction:column}.filter-select{width:100%}}.course-page-grid{gap:var(--space-2xl);grid-template-columns:minmax(0,1fr) 340px;align-items:start;display:grid}.course-page-main{min-width:0}.course-page-cover{margin-bottom:var(--space-xl);border-radius:var(--radius-xl);border:1px solid var(--border);background:linear-gradient(135deg,#6366f129,#f59e0b24);justify-content:center;align-items:center;min-height:280px;display:flex;overflow:hidden}.course-page-cover img{object-fit:contain;background:#0f172a59;width:100%;max-height:460px}.course-page-placeholder{color:var(--text-muted);justify-content:center;align-items:center;width:100%;min-height:280px;font-size:4rem;display:flex}.course-page-title{margin-bottom:var(--space-md);font-size:clamp(2rem,4vw,2.7rem);font-weight:800;line-height:1.1}.course-page-meta{align-items:center;gap:var(--space-md);margin-bottom:var(--space-xl);color:var(--text-secondary);flex-wrap:wrap;font-size:.92rem;display:flex}.course-page-author,.course-page-lessons{align-items:center;gap:var(--space-xs);display:inline-flex}.course-page-section{margin-bottom:var(--space-2xl)}.course-page-section h2{margin-bottom:var(--space-md);font-size:1.3rem;font-weight:700}.course-page-desc{color:var(--text-secondary);white-space:pre-wrap;line-height:1.85}.course-page-note{align-items:center;gap:var(--space-sm);margin-bottom:var(--space-md);border-radius:var(--radius);color:var(--text-secondary);background:#6366f11f;border:1px solid #818cf847;padding:10px 14px;display:inline-flex}.modules-list{gap:var(--space-md);flex-direction:column;display:flex}.module-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);overflow:hidden}.module-item.module-completed{border-color:#10b9814d;box-shadow:0 0 0 1px #10b9811f,0 14px 36px #10b98114}.module-item.module-completed .module-number{background:linear-gradient(135deg,#10b981,#059669)}.module-header{align-items:center;gap:var(--space-md);padding:var(--space-lg);display:flex}.module-number{background:linear-gradient(135deg, var(--primary), var(--primary-dark));color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:38px;height:38px;font-weight:700;display:flex}.module-heading{flex:1;min-width:0}.module-heading h3{margin-bottom:4px;font-size:1.05rem;font-weight:700}.module-count{color:var(--text-muted);font-size:.84rem}.module-heading-meta{align-items:center;gap:var(--space-sm);flex-wrap:wrap;display:flex}.module-completed-badge{color:var(--success);background:#10b9811f;border:1px solid #10b9813d;border-radius:999px;align-items:center;gap:6px;padding:4px 10px;font-size:.8rem;font-weight:700;display:inline-flex}.lessons-list{border-top:1px solid var(--border)}.lesson-item{border-bottom:1px solid var(--border)}.lesson-item:last-child{border-bottom:none}.lesson-link{align-items:center;gap:var(--space-sm);color:var(--text);transition:var(--transition);padding:14px 18px 14px 72px;font-size:.95rem;display:flex}.lesson-link:hover{background:var(--surface-hover)}.lesson-link.completed{background:#10b9810f;box-shadow:inset 4px 0 #10b981e6}.lesson-link.completed .lesson-icon,.lesson-link.completed .lesson-link-title{color:#d1fae5;font-weight:600}.lesson-link.locked{color:var(--text-muted);cursor:default}.lesson-link-title{flex:1;min-width:0}.lesson-icon{color:var(--primary-light);flex-shrink:0;font-size:1.1rem}.lesson-link.locked .lesson-icon{color:var(--text-muted)}.lesson-completed-indicator{color:var(--success);background:#10b98124;border:1px solid #10b98142;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:1.05rem;display:inline-flex}.sidebar-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);padding:var(--space-xl);top:calc(var(--header-height) + var(--space-lg));position:sticky}.sidebar-price{text-align:center;margin-bottom:var(--space-lg)}.price-free{color:var(--success);font-size:1.75rem;font-weight:800}.price-amount{font-size:1.75rem;font-weight:800}.sidebar-progress{margin-bottom:var(--space-lg)}.progress-text{color:var(--text-secondary);margin-bottom:var(--space-xs);justify-content:space-between;font-size:.85rem;display:flex}.progress-detail{margin-top:var(--space-xs);color:var(--text-muted);font-size:.82rem;display:block}.sidebar-btn{width:100%}.course-page-state{margin-top:var(--space-md);border-radius:var(--radius);color:var(--text-secondary);background:#10b9811f;border:1px solid #10b98138;padding:12px 14px;font-size:.88rem;line-height:1.6}.course-page-state.warning{background:#f59e0b1f;border-color:#f59e0b42}@media (width<=960px){.course-page-grid{grid-template-columns:1fr}.sidebar-card{position:static}}@media (width<=640px){.module-header{flex-wrap:wrap;align-items:flex-start}.lesson-link{padding-left:18px}}.lesson-page{max-width:920px;margin:0 auto}.lesson-back{margin-bottom:var(--space-lg)}.lesson-title{margin-bottom:var(--space-xl);font-size:clamp(1.9rem,4vw,2.5rem);font-weight:800}.lesson-content{gap:var(--space-lg);flex-direction:column;display:flex}.lesson-block{margin-bottom:0}.lesson-block-text{color:var(--text-secondary);font-size:1rem;line-height:1.9}.lesson-block-heading{color:var(--text);margin-top:var(--space-xl)}.lesson-video{aspect-ratio:16/9;border-radius:var(--radius-xl);border:1px solid var(--border);background:#020617;width:100%;overflow:hidden}.lesson-video-frame{border:0;width:100%;height:100%}.lesson-native-video{object-fit:contain;background:#020617;width:100%;height:100%}.lesson-block-image{align-items:center;gap:var(--space-sm);flex-direction:column;display:flex}.lesson-image-trigger{cursor:zoom-in;background:0 0;border:none;width:fit-content;max-width:100%;padding:0;display:block}.lesson-block-image img{object-fit:contain;border-radius:var(--radius-xl);border:1px solid var(--border);background:#0f172a66;width:100%;max-width:760px;max-height:520px}.image-caption{text-align:center;color:var(--text-muted);font-size:.88rem}.lesson-lightbox{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:1000;padding:var(--space-xl);background:#020617e0;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.lesson-lightbox-content{gap:var(--space-md);flex-direction:column;align-items:center;max-width:min(1100px,100%);max-height:100%;display:flex}.lesson-lightbox-image{object-fit:contain;border-radius:var(--radius-xl);max-width:100%;max-height:calc(100vh - 140px);box-shadow:0 24px 80px #0f172a73}.lesson-lightbox-caption{color:#e2e8f0e0;text-align:center;margin:0}.lesson-lightbox-close{color:#fff;background:#0f172ab8;border:1px solid #94a3b847;border-radius:50%;justify-content:center;align-items:center;width:44px;height:44px;font-size:1.35rem;display:flex;position:absolute;top:20px;right:20px}.lesson-block-code{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}.code-lang{background:var(--bg-elevated);color:var(--text-muted);text-transform:uppercase;padding:8px 16px;font-size:.75rem;font-weight:700}.lesson-block-code pre{padding:var(--space-lg);color:var(--text);margin:0;font-family:Courier New,monospace;font-size:.88rem;line-height:1.7;overflow-x:auto}.lesson-block-quiz{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);padding:var(--space-lg)}.quiz-question{margin-bottom:var(--space-md);color:var(--text);font-size:1.05rem;font-weight:600}.quiz-number{color:var(--primary-light);margin-bottom:var(--space-xs);font-size:.8rem;display:block}.quiz-options-list{gap:var(--space-sm);flex-direction:column;display:flex}.quiz-opt{align-items:center;gap:var(--space-md);background:var(--bg);border:2px solid var(--border);border-radius:var(--radius);transition:var(--transition);color:var(--text);text-align:left;padding:12px 16px;font-size:.95rem;display:flex}.quiz-opt:hover:not(:disabled){border-color:var(--primary)}.quiz-opt.selected{border-color:var(--primary);background:#6366f11f}.quiz-opt:disabled{cursor:default}.quiz-opt.correct{border-color:var(--success);background:#10b9811f}.quiz-opt.correct .quiz-opt-letter{background:var(--success);color:#fff}.quiz-opt.wrong{border-color:var(--danger);background:#ef44441a}.quiz-opt.wrong .quiz-opt-letter{background:var(--danger);color:#fff}.quiz-correct{border-color:var(--success)}.quiz-wrong{border-color:var(--danger)}.quiz-inline-result.result-correct{color:var(--success);font-weight:600}.quiz-inline-result.result-wrong{color:var(--danger);font-weight:600}.quiz-opt-letter{background:var(--bg-elevated);width:28px;height:28px;color:var(--text-secondary);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:.8rem;font-weight:700;display:flex}.lesson-block-alert{padding:var(--space-md) var(--space-lg);border-radius:var(--radius-lg);border-left:4px solid;line-height:1.7}.alert-info{border-color:var(--info);background:#3b82f61a}.alert-warning{border-color:var(--warning);background:#f59e0b1f}.alert-success{border-color:var(--success);background:#10b9811f}.alert-danger{border-color:var(--danger);background:#ef44441f}.lesson-block-divider{border:none;border-top:1px solid var(--border);margin:var(--space-sm) 0}.lesson-block-empty{border:1px dashed var(--border);border-radius:var(--radius-lg);color:var(--text-muted);text-align:center;padding:18px}.lesson-actions,.test-actions{padding:var(--space-2xl) 0 var(--space-xl);justify-content:center;display:flex}.lesson-completed{align-items:center;gap:var(--space-sm);color:var(--success);font-size:1.15rem;font-weight:700;display:flex}.test-result-card{background:var(--bg-card);border:2px solid var(--border);border-radius:var(--radius-xl);padding:var(--space-2xl);text-align:center;min-width:300px}.test-result-card.passed{border-color:var(--success)}.test-result-card.failed{border-color:var(--danger)}.test-result-score{background:linear-gradient(135deg, var(--primary-light), var(--accent));-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:3rem;font-weight:800}.test-result-label{margin:var(--space-sm) 0;font-size:1.2rem;font-weight:700}.test-result-hint,.quiz-inline-result{color:var(--text-secondary);margin-top:var(--space-sm)}.lesson-navigation{padding:var(--space-xl) 0;border-top:1px solid var(--border);margin-top:var(--space-xl);justify-content:space-between;align-items:center;gap:var(--space-md);display:flex}.lesson-nav-btn{align-items:center;gap:var(--space-sm);text-overflow:ellipsis;white-space:nowrap;max-width:45%;display:flex;overflow:hidden}@media (width<=640px){.lesson-navigation{flex-direction:column;align-items:stretch}.lesson-nav-btn{max-width:100%}}.dashboard-welcome{align-items:center;gap:var(--space-lg);margin-bottom:var(--space-2xl);padding:var(--space-xl);background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);display:flex}.user-avatar-lg{background:linear-gradient(135deg, var(--primary), var(--primary-dark));color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:64px;height:64px;font-size:1.2rem;font-weight:700;display:flex}.dashboard-welcome h2{font-size:1.3rem;font-weight:700}.text-muted{color:var(--text-muted);font-size:.9rem}.dashboard-section{margin-bottom:var(--space-2xl)}.dashboard-section h3{margin-bottom:var(--space-md);font-size:1.2rem;font-weight:700}.author-request-form{gap:var(--space-md);flex-direction:column;max-width:560px;display:flex}.author-request-status{padding:var(--space-md);background:var(--bg-card);border-radius:var(--radius);border:1px solid var(--border)}.purchases-list{gap:var(--space-md);grid-template-columns:repeat(auto-fill,minmax(320px,1fr));display:grid}.purchase-item{cursor:pointer}.purchase-item-body{align-items:center;gap:var(--space-md);display:flex}.purchase-item-cover{border-radius:var(--radius-lg);border:1px solid var(--border);background:#0f172a73;flex-shrink:0;width:72px;height:72px;overflow:hidden}.purchase-item-cover img,.purchase-item-fallback{object-fit:cover;width:100%;height:100%}.purchase-item-fallback{background:linear-gradient(135deg,#6366f133,#f59e0b33);justify-content:center;align-items:center;font-size:1.2rem;font-weight:800;display:flex}.purchase-item-content{flex-direction:column;gap:8px;min-width:0;display:flex}.purchase-item-content h4{font-size:.96rem;font-weight:600}@media (width<=640px){.dashboard-welcome{flex-direction:column;align-items:flex-start}}.author-header{justify-content:space-between;align-items:flex-start;gap:var(--space-lg);margin-bottom:var(--space-xl);display:flex}.author-header 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var(--ease);background:#0009;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-xl);width:100%;max-width:520px;max-height:90vh;animation:slideUp .3s var(--ease);overflow-y:auto}.modal-header{padding:var(--space-lg);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;display:flex}.modal-title{font-size:1.1rem;font-weight:700}.modal-body{padding:var(--space-lg)}.modal-footer{justify-content:flex-end;gap:var(--space-sm);padding:var(--space-md) var(--space-lg);border-top:1px solid var(--border);display:flex}.pagination{gap:var(--space-xs);margin-top:var(--space-xl);justify-content:center;display:flex}.pagination-btn{border-radius:var(--radius);background:var(--bg-card);border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;transition:var(--transition);padding:8px 14px;font-size:.85rem}.pagination-btn:hover{background:var(--surface-hover);color:var(--text)}.pagination-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}.skeleton{background:linear-gradient(90deg, var(--bg-elevated) 25%, var(--border) 50%, var(--bg-elevated) 75%);border-radius:var(--radius);background-size:200% 100%;animation:1.5s ease-in-out infinite shimmer}.grid-courses{gap:var(--space-lg);grid-template-columns:repeat(auto-fill,minmax(300px,1fr));display:grid}.grid-stats{gap:var(--space-md);grid-template-columns:repeat(auto-fill,minmax(200px,1fr));display:grid}.progress-bar{background:var(--bg-elevated);border-radius:var(--radius-full);height:8px;overflow:hidden}.progress-fill{background:linear-gradient(90deg, var(--primary), var(--primary-light));border-radius:var(--radius-full);height:100%;transition:width .5s var(--ease)}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-lg);flex-direction:column;display:flex}.stat-value{background:linear-gradient(135deg, var(--primary-light), var(--accent));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:2rem;font-weight:800}.stat-label{color:var(--text-secondary);margin-top:var(--space-xs);font-size:.85rem}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--border-light)}@media (width<=768px){.container{padding:0 var(--space-md)}.page-title{font-size:1.5rem}.grid-courses{grid-template-columns:1fr}.grid-stats{grid-template-columns:repeat(2,1fr)}}@media (width<=480px){.grid-stats{grid-template-columns:1fr}}