@import"https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap";:root{--bg-color: #0a0e17;--bg-surface: #111827;--bg-surface-hover: #1e293b;--text-primary: #e2e8f0;--text-secondary: #94a3b8;--accent-primary: #22d3ee;--accent-secondary: #a78bfa;--accent-gradient: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);--font-sans: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 2rem;--spacing-xl: 4rem;--border-radius-sm: 8px;--border-radius-md: 12px;--border-radius-lg: 24px;--border-color: rgba(255, 255, 255, .08);--shadow-glow: 0 0 30px rgba(34, 211, 238, .15)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{background-color:var(--bg-color);background-image:radial-gradient(circle at 15% 50%,rgba(34,211,238,.03) 0%,transparent 50%),radial-gradient(circle at 85% 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var(--border-color);border-radius:var(--border-radius-md)}.container{max-width:1200px;margin:0 auto;padding:0 5%}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeIn .6s cubic-bezier(.16,1,.3,1) forwards}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-color)}::-webkit-scrollbar-thumb{background:var(--bg-surface-hover);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--accent-primary)}.courses-navbar{position:fixed;top:14px;left:50%;transform:translate(-50%);width:auto;max-width:600px;z-index:1000;padding:8px 28px;border-radius:50px;border:1px solid rgba(255,255,255,.06);background:#0a0e17bf;backdrop-filter:blur(24px) saturate(180%);-webkit-backdrop-filter:blur(24px) saturate(180%);box-shadow:0 4px 24px #0000004d}.nav-container{display:flex;align-items:center;justify-content:center;gap:20px}.nav-logo{display:flex;align-items:center;gap:8px;white-space:nowrap;transition:opacity .3s ease}.nav-logo:hover{opacity:.85}.nav-logo-name{font-size:.82rem;font-weight:500;color:var(--text-primary)}.nav-logo-divider{font-size:.82rem;color:#ffffff26;font-weight:300}.nav-logo-alias{font-size:.82rem;font-weight:600;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hamburger{display:none;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer;padding:4px}.hamburger-line{display:block;width:20px;height:2px;background:var(--text-secondary);transition:all .3s ease}.hamburger-line.open:nth-child(1){transform:rotate(45deg) translate(3px,3px)}.hamburger-line.open:nth-child(2){opacity:0}.hamburger-line.open:nth-child(3){transform:rotate(-45deg) translate(4px,-4px)}.mobile-menu{display:none;flex-direction:column;gap:6px;padding:10px 0 6px;border-top:1px solid var(--border-color);margin-top:8px}.mobile-link{display:block;padding:8px 0;color:var(--text-secondary);font-size:.85rem;transition:color .2s ease}.mobile-link:hover{color:var(--accent-primary)}@media(max-width:640px){.courses-navbar{width:92%;top:8px;padding:8px 18px;border-radius:16px}.hamburger,.mobile-menu{display:flex}.nav-logo-name,.nav-logo-alias{font-size:.72rem}}.course-card{display:flex;flex-direction:column;overflow:hidden;text-decoration:none;color:inherit;transition:all .4s cubic-bezier(.4,0,.2,1);cursor:pointer}.course-card:hover{transform:translateY(-8px);box-shadow:0 20px 60px #0000004d,0 0 40px #22d3ee1a;border-color:#22d3ee33}.card-thumbnail{position:relative;width:100%;aspect-ratio:16/9;background:linear-gradient(135deg,#1a1a2e,#16213e);overflow:hidden}.card-thumb-img{width:100%;height:100%;object-fit:cover}.card-thumb-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#22d3ee0d,#a78bfa0d)}.thumb-icon{font-size:4rem;opacity:.4}.card-overlay{position:absolute;inset:0;background:#0009;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s ease}.course-card:hover .card-overlay{opacity:1}.card-overlay-text{color:#fff;font-weight:600;font-size:1.1rem;padding:10px 24px;border:2px solid var(--accent-primary);border-radius:var(--border-radius-md)}.card-body{padding:24px}.card-title{font-size:1.3rem;margin-bottom:12px;line-height:1.3}.card-desc{font-size:.9rem;color:var(--text-secondary);line-height:1.6;margin-bottom:20px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.card-meta{display:flex;gap:20px}.meta-item{display:flex;align-items:center;gap:6px;font-size:.85rem;color:var(--text-secondary)}.meta-icon{display:flex;align-items:center;justify-content:center}.text-type{display:inline-block;white-space:pre-wrap}.text-type__cursor{margin-left:.25rem;display:inline-block;opacity:1}.text-type__cursor--hidden{display:none}.catalog-page{padding-top:120px;padding-bottom:80px;min-height:100vh}.catalog-header{text-align:center;margin-bottom:50px}.catalog-title{font-size:3rem;margin-bottom:12px}.catalog-type-text{color:#fff}.catalog-type-text .text-type__cursor{color:var(--accent-primary);font-weight:300}.catalog-subtitle{font-size:1.15rem;color:var(--text-secondary);max-width:500px;margin:0 auto 28px}.search-wrapper{position:relative;max-width:480px;margin:0 auto}.search-icon{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--text-secondary);pointer-events:none}.search-input{width:100%;padding:14px 44px 14px 46px;border:1px solid var(--border-color);border-radius:var(--border-radius-lg);background:var(--bg-surface);color:var(--text-primary);font-size:.95rem;font-family:var(--font-sans);outline:none;transition:all .3s ease}.search-input::placeholder{color:var(--text-secondary);opacity:.6}.search-input:focus{border-color:var(--accent-primary);box-shadow:0 0 20px #22d3ee1a}.search-clear{position:absolute;right:14px;top:50%;transform:translateY(-50%);background:none;border:none;color:var(--text-secondary);cursor:pointer;font-size:.9rem;padding:4px;transition:color .2s ease}.search-clear:hover{color:var(--text-primary)}.catalog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:24px}.no-results{grid-column:1 / -1;text-align:center;padding:60px;color:var(--text-secondary);font-size:1.1rem}@media(max-width:640px){.catalog-grid{grid-template-columns:1fr}.catalog-title{font-size:2.2rem}}.module-accordion{margin-bottom:12px;overflow:hidden;transition:all .3s ease}.module-accordion:hover{border-color:#22d3ee26}.module-header{width:100%;display:flex;align-items:center;justify-content:space-between;padding:20px 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0}.lecture-row{display:flex;align-items:center;gap:4px;padding-right:24px}.lecture-check-btn{width:30px;height:30px;display:flex;align-items:center;justify-content:center;background:none;border:none;cursor:pointer;color:var(--text-secondary);margin-left:16px;flex-shrink:0;border-radius:50%;transition:all .2s ease}.lecture-check-btn:hover{background:#ffffff0d;color:var(--accent-primary)}.lecture-check-btn.checked{color:var(--accent-primary)}.check-empty{width:16px;height:16px;border-radius:50%;border:2px solid var(--border-color);display:block}.lecture-check-btn.checked .check-empty{display:none}.lecture-item{display:flex;align-items:center;gap:16px;padding:14px 16px 14px 8px;text-decoration:none;color:inherit;transition:all .2s ease;border-left:3px solid transparent;flex:1;min-width:0}.lecture-item.completed .lecture-title{color:var(--text-secondary)}.lecture-item:hover{background:#ffffff08;border-left-color:var(--accent-primary)}.lecture-num{font-size:.8rem;font-weight:700;background:#22d3ee14;color:var(--accent-primary);border:1px solid rgba(34,211,238,.2);border-radius:6px;padding:4px 10px;min-width:40px;text-align:center;flex-shrink:0;letter-spacing:.5px;font-family:JetBrains Mono,Fira Code,Consolas,monospace}.lecture-info{display:flex;flex-direction:column;gap:2px;min-width:0}.lecture-title{font-weight:500;font-size:.95rem}.lecture-subtitle{font-size:.8rem;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:flex;align-items:center;gap:12px}.lecture-duration{display:inline-flex;align-items:center;gap:4px;color:var(--accent-secondary);font-size:.75rem;flex-shrink:0}.quiz-badge-inline{padding:5px 14px;background:transparent;color:var(--accent-primary);font-weight:600;font-size:.72rem;border-radius:6px;border:1px solid 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translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}.cert-card{width:720px;max-width:95vw}.cert-outer-border{padding:3px;background:linear-gradient(135deg,#22d3ee,#a78bfa,#22d3ee);border-radius:4px}.cert-inner-border{padding:3px;background:#0a0e17;border-radius:3px}.cert-content{border:1px solid rgba(34,211,238,.12);border-radius:2px;padding:56px 52px;text-align:center;background:linear-gradient(180deg,#0d1117,#0a0e17,#0d1117);position:relative}.cert-content:before,.cert-content:after{content:"";position:absolute;width:40px;height:40px;border-color:#22d3ee33;border-style:solid}.cert-content:before{top:16px;left:16px;border-width:2px 0 0 2px}.cert-content:after{bottom:16px;right:16px;border-width:0 2px 2px 0}.cert-ornament-top{margin-bottom:16px}.cert-main-title{font-size:1.8rem;font-weight:300;color:#e2e8f0;text-transform:uppercase;letter-spacing:6px;margin-bottom:0}.cert-line{width:120px;height:1px;background:linear-gradient(90deg,transparent,#22d3ee,transparent);margin:24px auto}.cert-presented{font-size:.85rem;color:#64748b;margin-bottom:8px;letter-spacing:1px}.cert-holder-name{font-size:2rem;font-weight:700;background:linear-gradient(135deg,#22d3ee,#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:20px;line-height:1.3;font-style:italic}.cert-name-modal{display:flex;flex-direction:column;align-items:center;gap:16px;background:var(--bg-surface);border:1px solid var(--border-color);border-radius:16px;padding:48px 40px;max-width:420px;width:90%;text-align:center}.cert-name-title{font-size:1.5rem;color:var(--text-primary);margin:0}.cert-name-subtitle{font-size:.9rem;color:var(--text-secondary);margin:0;line-height:1.5}.cert-name-input{width:100%;padding:14px 18px;border:1px solid var(--border-color);border-radius:8px;background:var(--bg-color);color:var(--text-primary);font-size:1rem;font-family:var(--font-sans);outline:none;text-align:center;transition:border-color .3s ease}.cert-name-input::placeholder{color:var(--text-secondary);opacity:.5}.cert-name-input:focus{border-color:var(--accent-primary)}.cert-name-submit{padding:12px 32px;background:transparent;color:var(--accent-primary);font-weight:600;font-size:.9rem;border:1px solid rgba(34,211,238,.35);border-radius:8px;cursor:pointer;font-family:var(--font-sans);transition:all .3s ease;text-transform:uppercase;letter-spacing:.5px}.cert-name-submit:hover:not(:disabled){background:#22d3ee14;border-color:var(--accent-primary);box-shadow:0 0 20px #22d3ee26;transform:translateY(-2px)}.cert-name-submit:disabled{opacity:.4;cursor:not-allowed}.cert-course-name{font-size:1.5rem;font-weight:700;background:linear-gradient(135deg,#22d3ee,#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:20px;line-height:1.3}.cert-description{font-size:.8rem;color:#64748b;max-width:420px;margin:0 auto;line-height:1.7}.cert-footer{display:flex;justify-content:center;align-items:flex-start;gap:80px;margin-top:8px}.cert-footer-col{display:flex;flex-direction:column;align-items:center;min-width:140px}.cert-footer-above{height:60px;display:flex;align-items:flex-end;justify-content:center;padding-bottom:8px}.cert-footer-below{display:flex;flex-direction:column;align-items:center;padding-top:6px}.cert-date-value{font-size:.85rem;color:#94a3b8;margin:0}.cert-footer-line{width:140px;height:1px;background:#ffffff26}.cert-footer-label{font-size:.72rem;color:#94a3b8;text-transform:uppercase;letter-spacing:1.5px;margin:0}.cert-footer-role{font-size:.65rem;color:#475569;letter-spacing:1px;margin:2px 0 0}.cert-signature-col{padding-top:0}.cert-signature-img{height:48px;width:auto;object-fit:contain;display:block;filter:brightness(.9) invert(.8);opacity:.85}.cert-domain{font-size:.65rem;color:#334155;letter-spacing:3px;text-transform:uppercase;margin-top:28px}.cert-actions{display:flex;gap:12px}.cert-download-btn{padding:12px 32px;background:transparent;color:var(--accent-primary);font-weight:600;font-size:.9rem;border:1px solid rgba(34,211,238,.35);border-radius:8px;cursor:pointer;font-family:var(--font-sans);transition:all .3s ease}.cert-download-btn:hover{background:#22d3ee14;border-color:var(--accent-primary);box-shadow:0 0 20px #22d3ee26;transform:translateY(-2px)}.cert-close-btn{padding:12px 28px;background:transparent;color:var(--text-secondary);font-weight:600;font-size:.9rem;border:1px solid var(--border-color);border-radius:8px;cursor:pointer;font-family:var(--font-sans);transition:all .3s ease}.cert-close-btn:hover{border-color:var(--text-secondary);color:var(--text-primary)}@media(max-width:640px){.cert-content{padding:36px 24px}.cert-main-title{font-size:1.2rem;letter-spacing:3px}.cert-course-name{font-size:1.1rem}.cert-footer{flex-direction:column;gap:28px}}.course-page{padding-top:32px;padding-bottom:80px;min-height:100vh}.course-header{padding:40px;margin-bottom:40px}.course-title{font-size:2rem;margin-bottom:16px}.course-desc{color:var(--text-secondary);font-size:1.05rem;line-height:1.7;margin-bottom:24px;max-width:700px}.course-stats{display:flex;gap:24px;flex-wrap:wrap}.stat{font-size:.9rem;color:var(--text-secondary);display:flex;align-items:center;gap:6px}.course-progress-section{margin-top:24px;padding-top:20px;border-top:1px solid var(--border-color)}.course-progress-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.progress-label{font-size:.9rem;font-weight:600;color:var(--text-primary)}.progress-value{font-size:.85rem;color:var(--text-secondary)}.course-progress-track{width:100%;height:6px;background:var(--bg-surface-hover);border-radius:4px;overflow:hidden}.course-progress-fill{height:100%;background:var(--accent-gradient);border-radius:4px;transition:width .5s cubic-bezier(.16,1,.3,1);min-width:0}.modules-heading{font-size:1.4rem;margin-bottom:20px}.course-complete-banner{display:flex;align-items:center;gap:12px;margin-top:16px;padding:14px 20px;background:#22d3ee0f;border:1px solid rgba(34,211,238,.2);border-radius:8px}.complete-icon{font-size:1.4rem}.complete-text{font-size:.95rem;font-weight:600;color:var(--accent-primary);flex:1}.view-cert-btn{padding:8px 20px;background:transparent;color:var(--accent-primary);font-weight:600;font-size:.8rem;border:1px solid rgba(34,211,238,.35);border-radius:6px;cursor:pointer;font-family:var(--font-sans);text-transform:uppercase;letter-spacing:.5px;transition:all .3s ease;white-space:nowrap}.view-cert-btn:hover{background:#22d3ee14;border-color:var(--accent-primary);box-shadow:0 0 15px #22d3ee26;transform:translateY(-1px)}.not-found{text-align:center;padding:100px 20px}.back-link{color:var(--accent-primary);display:inline-block;margin-top:16px}@media(max-width:640px){.course-header{padding:24px}.course-title{font-size:1.6rem}}.yt-wrapper{position:relative;width:100%;aspect-ratio:16/9;border-radius:var(--border-radius-md);overflow:hidden;background:var(--bg-surface)}.yt-iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:none}.yt-placeholder{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;background:linear-gradient(135deg,#22d3ee0d,#a78bfa0d)}.yt-placeholder-icon{font-size:3rem;width:80px;height:80px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:#ffffff0d;border:2px solid var(--border-color)}.yt-placeholder p{color:var(--text-secondary);font-size:1.1rem}.lecture-page{padding-top:32px;padding-bottom:80px;min-height:100vh}.lecture-layout{display:grid;grid-template-columns:1fr 300px;gap:24px;align-items:start}.lecture-main{min-width:0}.lecture-details{margin-top:24px}.lecture-details-top{display:flex;flex-direction:column;gap:20px}.lecture-quiz-btn{padding:10px 22px;background:transparent;color:var(--accent-primary);font-weight:600;font-size:.9rem;border-radius:8px;border:1px solid rgba(34,211,238,.35);text-decoration:none;transition:all .3s ease;white-space:nowrap;flex-shrink:0;display:flex;align-items:center;gap:8px;letter-spacing:.3px;text-transform:uppercase;font-family:var(--font-sans)}.lecture-quiz-btn:hover{background:#22d3ee14;border-color:var(--accent-primary);box-shadow:0 0 20px #22d3ee26;transform:translateY(-2px);color:var(--accent-primary)}.lecture-id-tag{display:inline-block;font-size:.9rem;font-weight:700;padding:5px 16px;background:#22d3ee14;color:var(--accent-primary);border:1px solid rgba(34,211,238,.25);border-radius:6px;margin-bottom:12px;margin-right:8px;letter-spacing:.5px;font-family:JetBrains Mono,Fira Code,Consolas,monospace}.lecture-duration-tag{display:inline-flex;align-items:center;gap:4px;font-size:.8rem;color:var(--accent-secondary);margin-bottom:12px}.mark-complete-btn{padding:10px 22px;background:transparent;border:1px solid var(--border-color);color:var(--text-secondary);font-weight:600;font-size:.9rem;border-radius:var(--border-radius-md);cursor:pointer;transition:all .3s ease;white-space:nowrap;flex-shrink:0;font-family:var(--font-sans)}.mark-complete-btn:hover{border-color:var(--accent-primary);color:var(--accent-primary)}.mark-complete-btn.completed{background:#22d3ee1a;border-color:var(--accent-primary);color:var(--accent-primary)}.lecture-download-btn{padding:10px 22px;background:transparent;border:1px solid var(--accent-secondary);color:var(--accent-secondary);font-weight:600;font-size:.9rem;border-radius:var(--border-radius-md);text-decoration:none;transition:all .3s ease;white-space:nowrap;flex-shrink:0;display:flex;align-items:center;gap:8px}.lecture-download-btn:hover{background:#a78bfa0d}.lecture-heading{font-size:1.6rem;margin-bottom:8px}.lecture-sub{color:var(--text-secondary);font-size:1rem}.lecture-nav{display:flex;justify-content:space-between;gap:16px;margin-top:16px;margin-bottom:24px;flex-wrap:wrap}.lec-nav-btn{padding:12px 20px;border:1px solid var(--border-color);border-radius:var(--border-radius-md);color:var(--text-primary);font-size:.9rem;transition:all .3s ease;max-width:48%;text-overflow:ellipsis;overflow:hidden;white-space:nowrap}.lec-nav-btn:hover{border-color:var(--accent-primary);background:#22d3ee0d}.next-btn{margin-left:auto}.lecture-sidebar{padding:20px;max-height:calc(100vh - 64px);overflow-y:auto;position:sticky;top:32px}.sidebar-title{font-size:1rem;margin-bottom:16px;color:var(--text-secondary);font-weight:600}.sidebar-list{display:flex;flex-direction:column;gap:4px}.sidebar-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:var(--border-radius-sm);font-size:.85rem;color:var(--text-secondary);text-decoration:none;transition:all .2s ease}.sidebar-item:hover{background:#ffffff0a;color:var(--text-primary)}.sidebar-item.active{background:#22d3ee14;color:var(--accent-primary);font-weight:600}.sidebar-num{font-size:.72rem;font-weight:700;background:#22d3ee14;color:var(--accent-primary);border:1px solid rgba(34,211,238,.2);border-radius:4px;padding:3px 7px;min-width:34px;text-align:center;flex-shrink:0;font-family:JetBrains Mono,Fira Code,Consolas,monospace}.sidebar-name{text-overflow:ellipsis;overflow:hidden;white-space:nowrap;flex:1}.sidebar-quiz-dot{color:var(--accent-secondary);font-size:.6rem;flex-shrink:0}.sidebar-check{color:var(--accent-primary);font-size:.7rem;flex-shrink:0;margin-left:auto}.sidebar-completed .sidebar-name{color:var(--text-secondary)}.lecture-notes-section{margin-top:24px;border-top:1px solid var(--border-color);padding-top:16px}.notes-toggle-btn{display:flex;align-items:center;gap:8px;background:none;border:none;cursor:pointer;color:var(--text-primary);font-size:.95rem;font-weight:600;padding:8px 0;font-family:var(--font-sans);transition:color .2s ease}.notes-toggle-btn:hover{color:var(--accent-primary)}.notes-list{list-style:none;padding:12px 0 0;display:flex;flex-direction:column;gap:10px}.note-item{position:relative;padding-left:20px;color:var(--text-secondary);font-size:.9rem;line-height:1.6}.note-item:before{content:"▸";position:absolute;left:0;color:var(--accent-primary)}.user-notes-section{margin-top:16px;border-top:1px solid var(--border-color);padding-top:16px}.user-notes-body{margin-top:8px}.user-notes-textarea{width:100%;padding:14px 16px;border:1px solid var(--border-color);border-radius:var(--border-radius-sm);background:var(--bg-surface);color:var(--text-primary);font-family:var(--font-sans);font-size:.9rem;line-height:1.6;resize:vertical;outline:none;transition:border-color .3s ease;min-height:120px}.user-notes-textarea::placeholder{color:var(--text-secondary);opacity:.5}.user-notes-textarea:focus{border-color:var(--accent-primary)}.user-notes-saved{display:block;margin-top:8px;font-size:.75rem;color:var(--accent-primary);opacity:.7}@media(max-width:900px){.lecture-layout{grid-template-columns:1fr}.lecture-sidebar{position:static;max-height:none}}.quiz-container{max-width:720px;margin:0 auto}.quiz-progress{width:100%;height:4px;background:var(--bg-surface-hover);border-radius:4px;margin-bottom:30px;overflow:hidden}.quiz-progress-bar{height:100%;background:var(--accent-gradient);border-radius:4px;transition:width .4s ease}.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.quiz-counter{font-size:.9rem;color:var(--text-secondary)}.quiz-module-tag{font-size:.75rem;padding:4px 12px;background:var(--bg-surface-hover);border-radius:20px;color:var(--accent-primary);font-weight:600}.quiz-question{font-size:1.3rem;margin-bottom:28px;line-height:1.5}.quiz-options{display:flex;flex-direction:column;gap:12px;margin-bottom:24px}.quiz-option{display:flex;align-items:center;gap:16px;padding:16px 20px;border:1px solid var(--border-color);border-radius:var(--border-radius-md);background:var(--bg-surface);cursor:pointer;font-family:var(--font-sans);font-size:.95rem;color:var(--text-primary);transition:all .3s ease;text-align:left;width:100%}.quiz-option:hover:not(:disabled){border-color:var(--accent-primary);background:#22d3ee0d}.quiz-option.correct{border-color:#34d399;background:#34d3991a}.quiz-option.wrong{border-color:#f87171;background:#f871711a}.option-letter{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:var(--bg-surface-hover);font-weight:700;font-size:.85rem;color:var(--accent-primary);flex-shrink:0}.option-text{flex:1}.quiz-feedback{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.feedback-message{display:flex;align-items:center;gap:8px}.feedback-correct{color:#34d399;font-weight:600;margin:0}.feedback-wrong{color:#f87171;font-weight:600;margin:0}.quiz-btn{padding:12px 28px;background:transparent;color:var(--accent-primary);font-weight:600;font-size:.95rem;border:1px solid rgba(34,211,238,.35);border-radius:8px;cursor:pointer;font-family:var(--font-sans);transition:all .3s ease;letter-spacing:.3px;text-transform:uppercase}.quiz-btn:hover{background:#22d3ee14;border-color:var(--accent-primary);box-shadow:0 0 20px #22d3ee26;transform:translateY(-2px);color:var(--accent-primary)}.quiz-result{max-width:500px;margin:0 auto;text-align:center;padding:50px 40px}.result-badge{margin-bottom:20px;display:flex;align-items:center;justify-content:center}.quiz-result h2{margin-bottom:16px}.result-score{font-size:1.3rem;color:var(--text-primary);margin-bottom:10px}.result-msg{color:var(--text-secondary);margin-bottom:30px}.result-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.cert-btn{background:transparent;border:1px solid var(--accent-primary);color:var(--accent-primary)}.cert-btn:hover{background:#22d3ee1a;transform:translateY(-2px)}.quiz-empty{text-align:center;padding:60px 20px;color:var(--text-secondary);font-size:1.1rem}.keyboard-hint{text-align:center;font-size:.8rem;color:var(--text-secondary);opacity:.6;margin-top:-12px;margin-bottom:8px}.result-prev{font-size:.9rem;color:var(--accent-secondary);margin-bottom:8px}.quiz-page{padding-top:32px;padding-bottom:80px;min-height:100vh}.breadcrumb{display:inline-block;color:var(--accent-primary);font-size:.9rem;margin-bottom:24px;transition:opacity .3s}.breadcrumb:hover{opacity:.7}.quiz-page-header{text-align:center;margin-bottom:40px}.quiz-page-title{font-size:1.6rem;margin-bottom:10px}.quiz-page-desc{color:var(--text-secondary);font-size:1rem}.not-found-page{min-height:100vh;display:flex;align-items:center;justify-content:center}.not-found-content{text-align:center;padding:60px 20px}.not-found-code{font-size:8rem;font-weight:800;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1;display:block;margin-bottom:16px}.not-found-title{font-size:1.8rem;margin-bottom:12px}.not-found-desc{font-size:1.1rem;color:var(--text-secondary);margin-bottom:32px;max-width:400px;margin-left:auto;margin-right:auto}.not-found-btn{display:inline-block;padding:12px 28px;background:var(--accent-gradient);color:var(--bg-color);font-weight:700;font-size:.95rem;border-radius:var(--border-radius-md);transition:all .3s ease}.not-found-btn:hover{transform:translateY(-2px);box-shadow:0 8px 25px #22d3ee40;color:var(--bg-color)}