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p{margin:0;color:var(--text-secondary);font-size:.95rem}.learning-topics{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin:32px 0}.topic-group{background-color:var(--bg-secondary);border-radius:12px;padding:24px;border:1px solid var(--border-color)}.topic-group h3{margin:0 0 16px 0;color:var(--text-primary);font-size:1.25rem}.topic-group ul{margin:0;padding-left:20px}.topic-group li{margin-bottom:8px;color:var(--text-secondary)}.steps{margin:32px 0}.step{display:flex;gap:20px;margin-bottom:32px;align-items:flex-start}.step-number{flex-shrink:0;width:48px;height:48px;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.25rem}.step-content h3{margin:0 0 8px 0;color:var(--text-primary)}.step-content p{margin:0;color:var(--text-secondary)}.step-content a{color:var(--accent-primary);text-decoration:none;font-weight:500}.step-content a:hover{text-decoration:underline}.next-lesson{text-align:center;background:linear-gradient(135deg,var(--bg-secondary),var(--bg-tertiary));padding:48px 32px;border-radius:16px;margin:48px 0}.next-lesson h2{margin-bottom:16px;border:none;padding:0}.next-lesson p{margin-bottom:24px;font-size:1.125rem;color:var(--text-secondary)}.btn-large{padding:16px 32px;font-size:1.125rem}.lesson-navigation{display:flex;justify-content:space-between;align-items:center;margin:48px 0;padding:24px 0;border-top:1px solid var(--border-color)}.nav-item{text-align:center}.nav-item.prev{text-align:left}.nav-item.next{text-align:right;margin-left:auto}.nav-label{display:block;font-size:.875rem;color:var(--text-tertiary);margin-bottom:8px}.nav-link{color:var(--accent-primary);text-decoration:none;font-size:1.125rem;font-weight:500;transition:var(--transition)}.nav-link:hover{color:var(--accent-hover);text-decoration:underline}.quiz-section{margin:48px 0}.quiz-container{background-color:var(--bg-secondary);border-radius:12px;padding:32px;margin:24px 0;border:1px solid var(--border-color);box-shadow:var(--shadow)}.quiz-header{margin-bottom:24px}.quiz-header h3{margin:0 0 16px 0;color:var(--text-primary)}.quiz-progress{background-color:var(--bg-tertiary);height:8px;border-radius:4px;overflow:hidden}.progress-bar{background:linear-gradient(90deg,var(--accent-primary),var(--accent-secondary));height:100%;transition:width .3s ease}.quiz-question h4{margin-bottom:24px;color:var(--text-primary)}.quiz-options{margin-bottom:24px}.quiz-option{display:flex;align-items:center;gap:12px;padding:16px;background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:8px;margin-bottom:12px;cursor:pointer;transition:var(--transition)}.quiz-option:hover{background-color:var(--bg-tertiary);border-color:var(--accent-primary)}.quiz-option input[type=radio]{margin:0;flex-shrink:0}.quiz-option span{color:var(--text-primary);font-size:1rem;line-height:1.5;flex:1}[data-theme=dark] .quiz-option span{color:#e2e8f0}.quiz-actions{display:flex;gap:12px;margin-bottom:24px}.quiz-feedback .feedback{padding:20px;border-radius:8px;margin-top:16px}.feedback.correct{background-color:#d4edda;color:#155724;border:1px solid #c3e6cb}.feedback.incorrect{background-color:#f8d7da;color:#721c24;border:1px solid #f5c6cb}.feedback h5{margin:0 0 8px 0}.feedback p{margin:0}.quiz-results{text-align:center}.score-display{margin:32px 0}.score-circle{width:120px;height:120px;border-radius:50%;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));display:flex;align-items:center;justify-content:center;margin:0 auto 16px}.score-percentage{font-size:2rem;font-weight:700;color:#fff}.result-message{margin:24px 0;font-size:1.125rem}@media (max-width:768px){.lesson-header h1{font-size:2rem}.lesson-subtitle{font-size:1.125rem}.tutorial-stats{flex-direction:column;gap:24px}.learning-topics{grid-template-columns:1fr}.step{flex-direction:column;gap:16px}.step-number{align-self:flex-start}.lesson-navigation{flex-direction:column;gap:16px}.nav-item.next{margin-left:0;text-align:center}.quiz-actions{flex-direction:column}.code-block pre{padding:16px;font-size:.8rem}}@media (max-width:480px){.lesson-content{font-size:.95rem}.lesson-header h1{font-size:1.75rem}.lesson-intro{padding:20px;font-size:1rem}.code-example h3{padding:12px 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h3{background-color:#1f2937!important;border-bottom-color:#374151!important;color:#f9fafb!important}[data-theme=dark] .result-preview{background-color:#0f172a!important;border:1px solid #334155!important;color:#e2e8f0!important}[data-theme=dark] .result-preview h1,[data-theme=dark] .result-preview h2,[data-theme=dark] .result-preview h3,[data-theme=dark] .result-preview h4,[data-theme=dark] .result-preview h5,[data-theme=dark] .result-preview h6{background:0 0!important;background-color:transparent!important}[data-theme=dark] .feedback.correct{background-color:#1e4620;color:#4ade80;border-color:#22c55e}[data-theme=dark] .feedback.incorrect{background-color:#4c1d1d;color:#f87171;border-color:#ef4444}[data-theme=dark-orange] .result-preview{background-color:#1a1d24!important;border:1px solid #3d4149!important;color:#e2e8f0!important}[data-theme=dark-orange] .result-preview h1,[data-theme=dark-orange] .result-preview h2,[data-theme=dark-orange] .result-preview h3,[data-theme=dark-orange] 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.comment{color:#6a9955;font-style:italic}.code-block code .tag{color:#569cd6}.code-block code .attribute{color:#9cdcfe}.code-block code .string{color:#ce9178}.sticky-adsense{display:none}@media screen and (min-width:1440px){.sticky-adsense{display:block;position:fixed;right:20px;top:100px;width:300px;height:600px;z-index:100}.main-content{padding-right:340px}}@media screen and (min-width:1600px){.sticky-adsense{right:40px}.main-content{padding-right:360px}}