.navbar{position:fixed;top:0;left:0;right:0;background-color:var(--bg-primary);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-sm);z-index:1000;transition:var(--transition)}.navbar-container{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center;height:70px}.navbar-logo{display:flex;align-items:center;gap:10px;font-size:1.5rem;font-weight:700;color:var(--text-primary);text-decoration:none;transition:var(--transition)}.navbar-logo:hover{transform:scale(1.05)}.logo-icon{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-size:1.75rem}.logo-text{color:var(--text-primary)}.navbar-menu{display:flex;list-style:none;gap:10px;align-items:center}.navbar-menu li{position:relative}.navbar-menu a{color:var(--text-secondary);text-decoration:none;padding:8px 16px;border-radius:var(--border-radius);transition:var(--transition);font-weight:500;font-size:.95rem;display:block}.navbar-menu a:hover{color:var(--primary-color);background-color:var(--bg-tertiary)}.navbar-menu a.active{color:var(--primary-color);background-color:var(--bg-tertiary);position:relative}.navbar-menu a.active:after{content:"";position:absolute;bottom:-12px;left:50%;transform:translate(-50%);width:40%;height:2px;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));border-radius:2px}.theme-toggle{background:none;border:none;font-size:1.5rem;cursor:pointer;padding:8px;border-radius:var(--border-radius);transition:var(--transition);display:flex;align-items:center;justify-content:center;margin-left:8px}.theme-toggle:hover{background-color:var(--bg-tertiary);transform:rotate(20deg) scale(1.1)}.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;border-radius:var(--border-radius);transition:var(--transition)}.menu-toggle span{width:25px;height:3px;background-color:var(--text-primary);border-radius:2px;transition:var(--transition)}.menu-toggle:hover{background-color:var(--bg-tertiary)}@media (max-width: 768px){.menu-toggle{display:flex}.navbar-menu{position:fixed;top:70px;left:0;right:0;background-color:var(--bg-primary);flex-direction:column;gap:0;padding:20px;border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-lg);transform:translateY(-100%);opacity:0;visibility:hidden;transition:transform .3s ease,opacity .3s ease,visibility .3s ease}.navbar-menu.active{transform:translateY(0);opacity:1;visibility:visible}.navbar-menu li{width:100%}.navbar-menu a{width:100%;padding:12px 16px;margin-bottom:8px}.navbar-menu a.active:after{display:none}.theme-toggle{margin-left:0;width:100%;justify-content:flex-start;padding:12px 16px}}@media (max-width: 480px){.navbar-container{padding:0 16px}.navbar-logo{font-size:1.25rem}.logo-icon{font-size:1.5rem}}.footer{background-color:var(--bg-secondary);border-top:1px solid var(--border-color);margin-top:80px;padding:60px 0 20px}.footer-container{max-width:1200px;margin:0 auto 40px;padding:0 20px;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:40px}.footer-section h3{font-size:1.5rem;margin-bottom:16px;color:var(--text-primary)}.footer-section h4{font-size:1.125rem;margin-bottom:16px;color:var(--text-primary)}.footer-section p{color:var(--text-secondary);margin-bottom:20px;line-height:1.6}.footer-section ul{list-style:none}.footer-section ul li{margin-bottom:12px}.footer-section ul li a{color:var(--text-secondary);transition:var(--transition);display:inline-block}.footer-section ul li a:hover{color:var(--primary-color);transform:translate(5px)}.social-links{display:flex;gap:12px;margin-top:16px}.social-links a{width:40px;height:40px;display:flex;align-items:center;justify-content:center;background-color:var(--bg-tertiary);border-radius:50%;color:var(--text-secondary);transition:var(--transition)}.social-links a:hover{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;transform:translateY(-3px);box-shadow:var(--shadow-md)}.footer-bottom{text-align:center;padding:20px;border-top:1px solid var(--border-color);color:var(--text-muted);font-size:.875rem}.footer-bottom p{margin:0;color:var(--text-muted)}@media (max-width: 768px){.footer{padding:40px 0 20px}.footer-container{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px}}@media (max-width: 480px){.footer-container{grid-template-columns:1fr;gap:30px}}.hero{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:80px 20px;max-width:1200px;margin:0 auto}.hero-content{animation:fadeIn .8s ease-out}.hero-title{font-size:3.5rem;font-weight:800;line-height:1.2;margin-bottom:24px}.hero-tagline{font-size:1.375rem;color:var(--text-secondary);margin-bottom:40px;line-height:1.6}.hero-buttons{display:flex;gap:16px;flex-wrap:wrap}.hero-visual{animation:fadeIn 1s ease-out .2s both}.code-window{background-color:var(--bg-secondary);border-radius:var(--border-radius-xl);overflow:hidden;box-shadow:var(--shadow-xl);border:1px solid var(--border-color)}.code-window-header{background-color:var(--bg-tertiary);padding:12px 16px;display:flex;gap:8px;border-bottom:1px solid var(--border-color)}.dot{width:12px;height:12px;border-radius:50%}.dot.red{background-color:#ff5f56}.dot.yellow{background-color:#ffbd2e}.dot.green{background-color:#27c93f}.code-window-content{padding:24px;background-color:var(--bg-primary)}.code-window-content pre{font-family:Fira Code,monospace;font-size:.875rem;line-height:1.8;color:var(--text-primary);margin:0}.features{background-color:var(--bg-secondary);padding:80px 20px}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px;margin-top:60px}.feature-card{background-color:var(--bg-primary);padding:32px;border-radius:var(--border-radius-lg);border:1px solid var(--border-color);transition:var(--transition);text-align:center}.feature-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-xl);border-color:var(--primary-color)}.feature-icon{font-size:3rem;margin-bottom:20px}.feature-card h3{font-size:1.5rem;margin-bottom:16px;color:var(--text-primary)}.feature-card p{color:var(--text-secondary);line-height:1.6}.featured-lessons{padding:80px 20px}.lessons-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:30px;margin-top:60px}.lesson-card{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:32px;transition:var(--transition);position:relative;overflow:hidden}.lesson-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));transform:scaleX(0);transition:var(--transition)}.lesson-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-xl)}.lesson-card:hover:before{transform:scaleX(1)}.lesson-badge{display:inline-block;padding:6px 14px;border-radius:20px;font-size:.75rem;font-weight:600;background-color:var(--primary-light);color:#fff;margin-bottom:16px}.lesson-card h3{font-size:1.5rem;margin-bottom:12px;color:var(--text-primary)}.lesson-card p{color:var(--text-secondary);margin-bottom:20px;line-height:1.6}.lesson-meta{display:flex;gap:16px;margin-bottom:20px;color:var(--text-muted);font-size:.875rem}.duration{display:flex;align-items:center;gap:4px}.view-all{text-align:center;margin-top:50px}.cta-section{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;text-align:center;padding:80px 20px;border-radius:var(--border-radius-xl);margin:0 20px 40px}@media (max-width: 968px){.hero{grid-template-columns:1fr;gap:40px;padding:60px 20px}.hero-title{font-size:2.5rem}.hero-visual{order:-1}.features-grid{grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px}.lessons-grid{grid-template-columns:1fr}}@media (max-width: 480px){.hero{padding:40px 16px}.hero-title{font-size:2rem}.hero-tagline{font-size:1.125rem}.hero-buttons{flex-direction:column}.hero-buttons .btn-lg{width:100%}.features,.featured-lessons{padding:60px 16px}.cta-section{padding:60px 16px;margin:0 16px 40px}.cta-section h2{font-size:1.875rem}}.courses-page{padding-bottom:60px}.progress-section{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:24px;margin-bottom:40px;box-shadow:var(--shadow-sm)}.progress-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;font-weight:500;color:var(--text-secondary)}.progress-bar{height:12px;background-color:var(--bg-tertiary);border-radius:20px;overflow:hidden;position:relative}.progress-fill{height:100%;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));border-radius:20px;transition:width .5s ease;position:relative;overflow:hidden}.progress-fill:after{content:"";position:absolute;top:0;left:0;bottom:0;right:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);animation:shimmer 2s infinite}@keyframes shimmer{0%{transform:translate(-100%)}to{transform:translate(100%)}}.progress-percentage{text-align:right;margin-top:8px;font-weight:600;color:var(--primary-color);font-size:1.125rem}.filter-section{display:flex;align-items:center;gap:16px;margin-bottom:32px;flex-wrap:wrap}.filter-label{font-weight:500;color:var(--text-secondary)}.filter-buttons{display:flex;gap:10px;flex-wrap:wrap}.filter-btn{padding:8px 20px;border:2px solid var(--border-color);background-color:var(--bg-secondary);color:var(--text-secondary);border-radius:20px;cursor:pointer;transition:var(--transition);font-weight:500;font-size:.875rem}.filter-btn:hover{border-color:var(--primary-color);color:var(--primary-color)}.filter-btn.active{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;border-color:transparent}.lessons-list{display:flex;flex-direction:column;gap:20px}.lesson-item{background-color:var(--bg-secondary);border:2px solid var(--border-color);border-radius:var(--border-radius-lg);padding:24px;transition:var(--transition);position:relative}.lesson-item:hover{border-color:var(--primary-color);box-shadow:var(--shadow-lg)}.lesson-item.completed{background-color:var(--bg-tertiary);border-color:var(--success-color)}.lesson-item.completed:before{content:"✓";position:absolute;top:16px;right:16px;width:32px;height:32px;background-color:var(--success-color);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700}.lesson-item-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:12px;gap:16px}.lesson-item-info{flex:1}.lesson-item-info h3{font-size:1.5rem;margin:8px 0;color:var(--text-primary)}.lesson-description{color:var(--text-secondary);line-height:1.6;margin-bottom:16px}.lesson-item-footer{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}.lesson-meta{display:flex;gap:20px;color:var(--text-muted);font-size:.875rem}.category{text-transform:capitalize}.complete-btn{padding:8px 20px;border:2px solid var(--border-color);background-color:transparent;color:var(--text-secondary);border-radius:20px;cursor:pointer;transition:var(--transition);font-weight:500;font-size:.875rem;white-space:nowrap}.complete-btn:hover{border-color:var(--success-color);color:var(--success-color)}.complete-btn.completed{background-color:var(--success-color);color:#fff;border-color:var(--success-color)}@media (max-width: 768px){.progress-header{flex-direction:column;align-items:flex-start;gap:8px}.filter-section{flex-direction:column;align-items:flex-start}.lesson-item{padding:20px}.lesson-item-header{flex-direction:column}.lesson-item-footer{flex-direction:column;align-items:flex-start}.complete-btn{width:100%}}@media (max-width: 480px){.progress-section{padding:20px}.filter-buttons{width:100%}.filter-btn{flex:1;text-align:center}.lesson-item{padding:16px}.lesson-item.completed:before{top:12px;right:12px;width:28px;height:28px;font-size:.875rem}.lesson-item-info h3{font-size:1.25rem}}.code-editor{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);margin:2rem 0}.editor-header{background-color:var(--bg-tertiary);padding:12px 20px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-color)}.editor-title{font-weight:600;color:var(--text-primary);display:flex;align-items:center;gap:8px}.editor-title:before{content:"💻";font-size:1.2rem}.editor-controls{display:flex;gap:10px}.code-input{width:100%;min-height:300px;padding:20px;font-family:Fira Code,monospace;font-size:14px;line-height:1.6;background-color:var(--bg-primary);color:var(--text-primary);border:none;resize:vertical;outline:none}.code-input:focus{background-color:var(--bg-secondary)}.output-section{border-top:1px solid var(--border-color)}.output-header{background-color:var(--bg-tertiary);padding:10px 20px;font-weight:600;font-size:.875rem;color:var(--text-secondary);border-bottom:1px solid var(--border-color)}.output-content{padding:20px;min-height:100px;max-height:300px;overflow-y:auto;font-family:Fira Code,monospace;font-size:14px;line-height:1.6;color:var(--text-primary);background-color:var(--bg-primary);white-space:pre-wrap;word-wrap:break-word}.output-content:empty:before{content:'Click "Run Code" to see output...';color:var(--text-muted);font-style:italic}@media (max-width: 768px){.editor-header{padding:10px 16px}.editor-controls{gap:8px}.code-input{padding:16px;font-size:13px;min-height:250px}.output-content{padding:16px;font-size:13px}}@media (max-width: 480px){.editor-header{flex-direction:column;align-items:flex-start;gap:10px}.editor-controls{width:100%;justify-content:flex-end}.code-input{min-height:200px;font-size:12px}.output-content{font-size:12px}}.lesson-detail{padding-bottom:60px}.lesson-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.back-link{color:var(--text-secondary);font-weight:500;transition:var(--transition);display:inline-flex;align-items:center;gap:4px}.back-link:hover{color:var(--primary-color);transform:translate(-4px)}.lesson-meta-header{display:flex;gap:12px;align-items:center}.lesson-title{font-size:3rem;margin-bottom:16px;line-height:1.2}.lesson-subtitle{font-size:1.25rem;color:var(--text-secondary);margin-bottom:40px}.lesson-content{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:40px;margin-bottom:40px;line-height:1.8}.lesson-content h1{font-size:2.5rem;margin-top:2rem;margin-bottom:1rem;padding-top:1rem;border-top:2px solid var(--border-color)}.lesson-content h1:first-child{margin-top:0;padding-top:0;border-top:none}.lesson-content h2{font-size:2rem;margin-top:2rem;margin-bottom:1rem;color:var(--text-primary)}.lesson-content h3{font-size:1.5rem;margin-top:1.5rem;margin-bottom:.75rem;color:var(--text-primary)}.lesson-content p{margin-bottom:1rem;color:var(--text-secondary)}.lesson-content ul{margin-left:2rem;margin-bottom:1.5rem}.lesson-content li{margin-bottom:.5rem;color:var(--text-secondary)}.lesson-content code{background-color:var(--bg-tertiary);padding:2px 8px;border-radius:4px;font-size:.9em;color:var(--primary-color);font-family:Fira Code,monospace}.lesson-content strong{color:var(--text-primary);font-weight:600}.code-section{margin:40px 0}.code-section h2{margin-bottom:20px}.quiz-section{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:40px;margin:40px 0}.quiz-section h2{margin-bottom:32px}.quiz-question{margin-bottom:32px;padding:24px;background-color:var(--bg-primary);border-radius:var(--border-radius);border:1px solid var(--border-color)}.quiz-question h3{margin-bottom:20px;font-size:1.25rem;color:var(--text-primary)}.quiz-options{display:flex;flex-direction:column;gap:12px}.quiz-option{display:flex;align-items:center;gap:12px;padding:16px;background-color:var(--bg-secondary);border:2px solid var(--border-color);border-radius:var(--border-radius);cursor:pointer;transition:var(--transition);position:relative}.quiz-option:hover,.quiz-option.selected{border-color:var(--primary-color);background-color:var(--bg-tertiary)}.quiz-option.correct{border-color:var(--success-color);background-color:#10b9811a}.quiz-option.incorrect{border-color:var(--error-color);background-color:#ef44441a}.quiz-option input[type=radio]{cursor:pointer}.quiz-option span{flex:1;color:var(--text-primary)}.correct-icon{color:var(--success-color);font-weight:700;font-size:1.25rem}.quiz-results{margin-top:32px;padding:24px;background-color:var(--bg-primary);border-radius:var(--border-radius);text-align:center}.quiz-results h3{color:var(--text-primary);margin-bottom:12px;font-size:1.75rem}.quiz-results p{color:var(--text-secondary);margin-bottom:20px;font-size:1.125rem}.lesson-navigation{display:flex;justify-content:space-between;gap:20px;margin-top:60px;padding-top:40px;border-top:2px solid var(--border-color)}.nav-btn{flex:1;max-width:400px;padding:20px 24px;background-color:var(--bg-secondary);border:2px solid var(--border-color);border-radius:var(--border-radius-lg);color:var(--text-primary);font-weight:500;transition:var(--transition);text-align:center}.nav-btn:hover{border-color:var(--primary-color);transform:translateY(-4px);box-shadow:var(--shadow-lg)}.nav-btn.prev{text-align:left}.nav-btn.next{text-align:right}@media (max-width: 768px){.lesson-header{flex-direction:column;align-items:flex-start;gap:12px}.lesson-title{font-size:2rem}.lesson-subtitle{font-size:1.125rem}.lesson-content{padding:24px}.lesson-content h1{font-size:2rem}.lesson-content h2{font-size:1.5rem}.quiz-section{padding:24px}.quiz-question{padding:20px}.lesson-navigation{flex-direction:column}.nav-btn{max-width:100%;text-align:center}.nav-btn.prev,.nav-btn.next{text-align:center}}@media (max-width: 480px){.lesson-content{padding:20px}.lesson-title{font-size:1.75rem}.quiz-section{padding:20px}.quiz-question{padding:16px}.quiz-option{padding:12px}.quiz-results{padding:20px}}.practice-page{padding-bottom:60px}.page-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:24px}.stats-card{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;padding:24px;border-radius:var(--border-radius-lg);box-shadow:var(--shadow-lg);display:flex;flex-direction:column;gap:12px;min-width:200px}.points-display{display:flex;justify-content:space-between;align-items:center}.points-label{font-size:.875rem;opacity:.9}.points-value{font-size:2rem;font-weight:700}.badge-display{padding:8px 16px;background-color:#fff3;border-radius:20px;text-align:center;border:2px solid}.badge-name{font-weight:600;font-size:.875rem}.solved-count{font-size:.875rem;text-align:center;opacity:.9}.practice-layout{display:grid;grid-template-columns:350px 1fr;gap:30px;margin-top:40px}.exercises-list{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:24px;height:fit-content;max-height:calc(100vh - 200px);overflow-y:auto;position:sticky;top:90px}.exercises-list h2{font-size:1.5rem;margin-bottom:20px;color:var(--text-primary)}.exercise-item{padding:16px;background-color:var(--bg-primary);border:2px solid var(--border-color);border-radius:var(--border-radius);margin-bottom:12px;cursor:pointer;transition:var(--transition);position:relative}.exercise-item:hover{border-color:var(--primary-color);transform:translate(4px)}.exercise-item.active{border-color:var(--primary-color);background-color:var(--bg-tertiary)}.exercise-item.solved{border-color:var(--success-color)}.exercise-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:8px}.exercise-item h3{font-size:1rem;margin:0 0 8px;color:var(--text-primary)}.solved-badge{color:var(--success-color);font-weight:700;font-size:1.25rem}.exercise-item p{font-size:.875rem;color:var(--text-secondary);margin-top:8px}.exercise-workspace{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:32px}.no-exercise-selected{text-align:center;padding:100px 20px;color:var(--text-secondary)}.placeholder-icon{font-size:4rem;margin-bottom:20px;opacity:.5}.exercise-details{margin-bottom:32px}.exercise-details-header{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:16px;flex-wrap:wrap}.exercise-details h2{margin:0;font-size:2rem}.exercise-description{font-size:1.125rem;color:var(--text-secondary);margin-bottom:24px}.instructions{background-color:var(--bg-primary);padding:20px;border-radius:var(--border-radius);border-left:4px solid var(--primary-color);margin-bottom:24px}.instructions h3{font-size:1.125rem;margin-bottom:12px;color:var(--text-primary)}.instructions p{color:var(--text-secondary);margin:0}.test-cases{background-color:var(--bg-primary);padding:20px;border-radius:var(--border-radius);margin-bottom:24px}.test-cases h3{font-size:1.125rem;margin-bottom:12px;color:var(--text-primary)}.test-cases pre{background-color:var(--bg-tertiary);padding:12px;border-radius:var(--border-radius);overflow-x:auto;color:var(--text-primary);font-family:Fira Code,monospace}.exercise-actions{display:flex;gap:12px;margin:24px 0;flex-wrap:wrap}.hints-section{background-color:#fff3cd;border:1px solid #ffc107;border-radius:var(--border-radius);padding:20px;margin:24px 0}body.dark-mode .hints-section{background-color:#ffc1071a;border-color:#ffc1074d}.hints-section h3{color:#856404;margin-bottom:12px;font-size:1.125rem}body.dark-mode .hints-section h3{color:#ffc107}.hint{padding:12px;background-color:#ffffff80;border-radius:var(--border-radius);margin-bottom:8px;color:#856404;font-size:.95rem}body.dark-mode .hint{background-color:#ffffff0d;color:#ffc107}.hint-number{font-weight:600;margin-right:8px}.feedback{padding:20px;border-radius:var(--border-radius);margin:24px 0;font-weight:500;text-align:center}.feedback.success{background-color:#d1f2eb;color:#0f5132;border:2px solid #198754}body.dark-mode .feedback.success{background-color:#10b9811a;color:#10b981;border-color:#10b981}.feedback.error{background-color:#f8d7da;color:#842029;border:2px solid #dc3545}body.dark-mode .feedback.error{background-color:#ef44441a;color:#ef4444;border-color:#ef4444}.solution-section{background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--border-radius);padding:24px;margin-top:24px}.solution-section h3{margin-bottom:16px;color:var(--text-primary)}@media (max-width: 968px){.practice-layout{grid-template-columns:1fr}.exercises-list{position:static;max-height:400px}}@media (max-width: 768px){.page-header{flex-direction:column;align-items:flex-start}.stats-card{width:100%}.exercise-workspace{padding:24px}.exercise-details-header,.exercise-actions{flex-direction:column}.exercise-actions button{width:100%}}@media (max-width: 480px){.exercises-list{padding:16px}.exercise-workspace,.stats-card{padding:20px}.points-value{font-size:1.5rem}}.resources-page{padding-bottom:60px}.resources-section{margin-bottom:80px}.resources-section h2{font-size:2rem;margin-bottom:32px;color:var(--text-primary)}.resources-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}.resource-card{background-color:var(--bg-secondary);border:2px solid var(--border-color);border-radius:var(--border-radius-lg);padding:28px;transition:var(--transition);text-decoration:none;display:flex;flex-direction:column;position:relative;overflow:hidden}.resource-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));transform:scaleX(0);transition:var(--transition)}.resource-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-xl);border-color:var(--primary-color)}.resource-card:hover:before{transform:scaleX(1)}.resource-icon{font-size:2.5rem;margin-bottom:16px}.resource-card h3{font-size:1.25rem;margin-bottom:12px;color:var(--text-primary)}.resource-card p{color:var(--text-secondary);line-height:1.6;margin-bottom:16px;flex:1}.resource-link{color:var(--primary-color);font-weight:500;display:flex;align-items:center;gap:4px;transition:var(--transition)}.resource-card:hover .resource-link{transform:translate(4px)}.tips-section{background-color:var(--bg-secondary);border-radius:var(--border-radius-xl);padding:60px 40px;margin-top:80px}.tips-section h2{text-align:center;font-size:2.5rem;margin-bottom:48px}.tips-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px}.tip-card{background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:28px;transition:var(--transition)}.tip-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.tip-card h3{font-size:1.25rem;margin-bottom:12px;color:var(--text-primary);display:flex;align-items:center;gap:8px}.tip-card h3:before{content:"💡";font-size:1.5rem}.tip-card p{color:var(--text-secondary);line-height:1.6;margin:0}@media (max-width: 768px){.resources-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}.tips-section{padding:40px 24px}.tips-grid{grid-template-columns:1fr;gap:20px}}@media (max-width: 480px){.resources-grid{grid-template-columns:1fr}.resource-card{padding:24px}.tips-section{padding:32px 20px}.tip-card{padding:24px}}.about-page{padding-bottom:60px}.mission-section{display:grid;grid-template-columns:1.5fr 1fr;gap:60px;align-items:center;margin-bottom:80px;padding:40px 0}.mission-content h2{font-size:2.5rem;margin-bottom:24px}.mission-content p{font-size:1.125rem;line-height:1.8;color:var(--text-secondary);margin-bottom:20px}.mission-visual{display:flex;justify-content:center}.stats-box{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;padding:40px;border-radius:var(--border-radius-xl);box-shadow:var(--shadow-xl);display:flex;flex-direction:column;gap:32px;min-width:280px}.stat{text-align:center}.stat-number{font-size:3rem;font-weight:700;margin-bottom:8px}.stat-label{font-size:1.125rem;opacity:.9}.features-overview{margin-bottom:80px}.features-overview h2{text-align:center;font-size:2.5rem;margin-bottom:48px}.features-list{display:flex;flex-direction:column;gap:32px}.feature-item{display:grid;grid-template-columns:100px 1fr;gap:32px;background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:32px;transition:var(--transition)}.feature-item:hover{transform:translate(8px);box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.feature-number{font-size:3rem;font-weight:700;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-align:center}.feature-content h3{font-size:1.5rem;margin-bottom:12px;color:var(--text-primary)}.feature-content p{color:var(--text-secondary);line-height:1.7;margin:0}.creator-section{background-color:var(--bg-secondary);border-radius:var(--border-radius-xl);padding:60px 40px;margin-bottom:80px}.creator-section h2{text-align:center;font-size:2.5rem;margin-bottom:48px}.creator-content{display:grid;grid-template-columns:200px 1fr;gap:40px;align-items:center}.creator-avatar{display:flex;justify-content:center}.avatar-placeholder{width:180px;height:180px;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:5rem;box-shadow:var(--shadow-xl)}.creator-bio h3{font-size:1.75rem;margin-bottom:20px;color:var(--text-primary)}.creator-bio p{font-size:1.125rem;line-height:1.8;color:var(--text-secondary);margin-bottom:20px}.values-section{margin-bottom:80px}.values-section h2{text-align:center;font-size:2.5rem;margin-bottom:48px}.values-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:30px}.value-card{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:32px;text-align:center;transition:var(--transition)}.value-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-xl);border-color:var(--primary-color)}.value-icon{font-size:3rem;margin-bottom:20px}.value-card h3{font-size:1.5rem;margin-bottom:12px;color:var(--text-primary)}.value-card p{color:var(--text-secondary);line-height:1.6;margin:0}.cta-section{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;text-align:center;padding:80px 40px;border-radius:var(--border-radius-xl)}.cta-section h2{font-size:2.5rem;color:#fff;margin-bottom:16px}.cta-section p{font-size:1.25rem;color:#ffffffe6;margin-bottom:32px}.cta-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}.cta-section .btn-primary{background-color:#fff;color:var(--primary-color)}.cta-section .btn-primary:hover{background-color:var(--bg-secondary)}.cta-section .btn-secondary{background-color:transparent;color:#fff;border-color:#fff}.cta-section .btn-secondary:hover{background-color:#ffffff1a}@media (max-width: 968px){.mission-section{grid-template-columns:1fr;gap:40px}.mission-visual{order:-1}.feature-item{grid-template-columns:80px 1fr;gap:24px;padding:24px}.feature-number{font-size:2.5rem}.creator-content{grid-template-columns:1fr;text-align:center}.values-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}}@media (max-width: 480px){.mission-content h2{font-size:2rem}.stats-box{padding:32px 24px}.stat-number{font-size:2.5rem}.creator-section{padding:40px 24px}.avatar-placeholder{width:150px;height:150px;font-size:4rem}.feature-item{grid-template-columns:1fr;text-align:center}.cta-section{padding:60px 24px}.cta-buttons{flex-direction:column}.cta-buttons .btn-lg{width:100%}}.contact-page{padding-bottom:60px}.contact-layout{display:grid;grid-template-columns:1fr 1.5fr;gap:60px;margin-bottom:80px}.contact-info h2{font-size:2rem;margin-bottom:20px;color:var(--text-primary)}.contact-info>p{font-size:1.125rem;line-height:1.7;color:var(--text-secondary);margin-bottom:32px}.info-items{display:flex;flex-direction:column;gap:24px;margin-bottom:40px}.info-item{display:flex;gap:16px;align-items:flex-start}.info-icon{font-size:2rem;width:50px;height:50px;display:flex;align-items:center;justify-content:center;background-color:var(--bg-secondary);border-radius:var(--border-radius);flex-shrink:0}.info-content h3{font-size:1.125rem;margin-bottom:8px;color:var(--text-primary)}.info-content p,.info-content a{color:var(--text-secondary);margin:0}.info-content a:hover{color:var(--primary-color)}.social-section{background-color:var(--bg-secondary);padding:24px;border-radius:var(--border-radius-lg);border:1px solid var(--border-color)}.social-section h3{font-size:1.25rem;margin-bottom:16px;color:var(--text-primary)}.social-links{display:flex;gap:12px;flex-wrap:wrap}.social-link{display:flex;align-items:center;gap:8px;padding:10px 16px;background-color:var(--bg-primary);border:2px solid var(--border-color);border-radius:var(--border-radius);color:var(--text-secondary);transition:var(--transition);text-decoration:none;font-weight:500}.social-link:hover{border-color:var(--primary-color);color:var(--primary-color);transform:translateY(-2px);box-shadow:var(--shadow-md)}.contact-form-container{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:40px;box-shadow:var(--shadow-md);position:relative}.contact-form.hidden{display:none}.form-group{margin-bottom:24px}.form-group label{display:block;margin-bottom:8px;font-weight:500;color:var(--text-primary)}.form-group input,.form-group textarea{width:100%;padding:12px 16px;background-color:var(--bg-primary);border:2px solid var(--border-color);border-radius:var(--border-radius);color:var(--text-primary);font-size:1rem;font-family:inherit;transition:var(--transition)}.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #6366f11a}.form-group input.error,.form-group textarea.error{border-color:var(--error-color)}.error-message{display:block;margin-top:6px;color:var(--error-color);font-size:.875rem}.form-group textarea{resize:vertical;min-height:120px}.success-message{text-align:center;padding:60px 20px;animation:fadeIn .5s ease-out}.success-icon{width:80px;height:80px;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:3rem;margin:0 auto 24px;box-shadow:var(--shadow-lg)}.success-message h3{font-size:2rem;margin-bottom:12px;color:var(--text-primary)}.success-message p{font-size:1.125rem;color:var(--text-secondary)}.faq-section{background-color:var(--bg-secondary);border-radius:var(--border-radius-xl);padding:60px 40px}.faq-section h2{text-align:center;font-size:2.5rem;margin-bottom:48px}.faq-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px}.faq-item{background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:28px;transition:var(--transition)}.faq-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.faq-item h3{font-size:1.125rem;margin-bottom:12px;color:var(--text-primary);display:flex;align-items:flex-start;gap:8px}.faq-item h3:before{content:"❓";font-size:1.25rem;flex-shrink:0}.faq-item p{color:var(--text-secondary);line-height:1.6;margin:0}@media (max-width: 968px){.contact-layout{grid-template-columns:1fr;gap:40px}}@media (max-width: 768px){.contact-form-container{padding:32px}.faq-section{padding:40px 24px}.faq-grid{grid-template-columns:1fr;gap:20px}}@media (max-width: 480px){.contact-form-container{padding:24px}.success-message{padding:40px 20px}.success-icon{width:60px;height:60px;font-size:2rem}.success-message h3{font-size:1.5rem}.faq-section{padding:32px 20px}.faq-item{padding:24px}}:root{--primary-color: #6366f1;--primary-dark: #4f46e5;--primary-light: #818cf8;--secondary-color: #8b5cf6;--accent-color: #ec4899;--text-primary: #1f2937;--text-secondary: #6b7280;--text-muted: #9ca3af;--bg-primary: #ffffff;--bg-secondary: #f9fafb;--bg-tertiary: #f3f4f6;--border-color: #e5e7eb;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1);--success-color: #10b981;--error-color: #ef4444;--warning-color: #f59e0b;--info-color: #3b82f6;--border-radius: 8px;--border-radius-lg: 12px;--border-radius-xl: 16px;--transition: all .3s ease}body.dark-mode{--text-primary: #f9fafb;--text-secondary: #d1d5db;--text-muted: #9ca3af;--bg-primary: #111827;--bg-secondary: #1f2937;--bg-tertiary: #374151;--border-color: #374151;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .5);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .6)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;transition:background-color .3s ease,color .3s ease}code,pre{font-family:Fira Code,Courier New,monospace}.app{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;margin-top:70px}.container{max-width:1200px;margin:0 auto;padding:0 20px}.btn-primary,.btn-secondary,.btn-outline{padding:12px 24px;border-radius:var(--border-radius);font-weight:500;font-size:16px;cursor:pointer;transition:var(--transition);border:none;text-decoration:none;display:inline-block;text-align:center}.btn-primary{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;box-shadow:var(--shadow-md)}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-secondary{background-color:var(--bg-tertiary);color:var(--text-primary);border:2px solid var(--border-color)}.btn-secondary:hover{background-color:var(--bg-secondary);border-color:var(--primary-color);color:var(--primary-color)}.btn-outline{background-color:transparent;color:var(--text-secondary);border:2px solid var(--border-color)}.btn-outline:hover{background-color:var(--bg-tertiary);border-color:var(--text-secondary)}.btn-sm{padding:8px 16px;font-size:14px}.btn-lg{padding:16px 32px;font-size:18px}h1,h2,h3,h4,h5,h6{line-height:1.2;margin-bottom:1rem;color:var(--text-primary)}h1{font-size:3rem;font-weight:700}h2{font-size:2.5rem;font-weight:600}h3{font-size:1.875rem;font-weight:600}p{margin-bottom:1rem;color:var(--text-secondary)}a{color:var(--primary-color);text-decoration:none;transition:var(--transition)}a:hover{color:var(--primary-dark)}.highlight{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.page-header{text-align:center;padding:60px 0 40px}.page-header h1{margin-bottom:16px}.page-header p{font-size:1.25rem;color:var(--text-secondary)}.section-title{text-align:center;margin-bottom:3rem;font-size:2.5rem}.code-block{background-color:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--border-radius);padding:1.5rem;overflow-x:auto;margin:1.5rem 0;box-shadow:var(--shadow-sm)}.code-block code{color:var(--text-primary);font-size:.9rem;line-height:1.6}.difficulty-badge{display:inline-block;padding:4px 12px;border-radius:20px;font-size:.875rem;font-weight:500;text-transform:capitalize}.difficulty-badge.beginner{background-color:#d1fae5;color:#065f46}body.dark-mode .difficulty-badge.beginner{background-color:#064e3b;color:#6ee7b7}.difficulty-badge.intermediate{background-color:#fef3c7;color:#92400e}body.dark-mode .difficulty-badge.intermediate{background-color:#78350f;color:#fcd34d}.difficulty-badge.advanced{background-color:#fee2e2;color:#991b1b}body.dark-mode .difficulty-badge.advanced{background-color:#7f1d1d;color:#fca5a5}.no-results{text-align:center;padding:60px 20px;color:var(--text-secondary)}.not-found{text-align:center;padding:100px 20px}.not-found h1{font-size:4rem;margin-bottom:1rem}@media (max-width: 768px){h1{font-size:2rem}h2{font-size:1.75rem}h3{font-size:1.5rem}.page-header{padding:40px 0 30px}.btn-lg{padding:14px 28px;font-size:16px}}@media (max-width: 480px){.container{padding:0 16px}h1{font-size:1.75rem}h2{font-size:1.5rem}}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{transform:translate(-100%)}to{transform:translate(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}