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1px 3px #0000004d;--shadow-md:0 4px 16px #0006;--shadow-card:0 4px 20px #0000004d}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;line-height:var(--line-height);-webkit-text-size-adjust:100%;scroll-behavior:smooth;width:100%;max-width:100vw;transition:background-color .2s,color .2s;overflow-x:hidden}body{font-family:var(--font-family);font-size:var(--font-size-base);color:var(--color-text);background-color:var(--color-bg);line-height:var(--line-height);width:100%;max-width:100vw;min-height:100vh;margin:0;padding:0;transition:background-color .2s,color .2s;overflow-x:hidden}h1,h2,h3,h4,h5,h6{font-family:var(--font-family);color:var(--color-heading);margin-bottom:var(--spacing-sm);font-weight:700;line-height:1.3}h1{font-size:var(--font-size-h1)}h2{font-size:var(--font-size-2xl)}h3{font-size:var(--font-size-xl)}h4{font-size:var(--font-size-lg)}a{color:var(--color-link);text-decoration:none;transition:color 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.btn-primary{color:#fff;background:#0284c7}html.dark .btn-primary:hover,html[data-theme=dark] .btn-primary:hover{color:#fff;background:#0369a1}.btn-secondary{background:var(--color-bg-card);color:var(--color-primary);border:1px solid var(--color-primary)}.btn-secondary:hover{background:var(--color-primary-light);text-decoration:none}.btn-success{background:var(--color-success);color:#fff}.mcq-card{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--border-radius-md);padding:var(--spacing-lg);margin-bottom:var(--spacing-md);box-shadow:var(--shadow-card);overflow-wrap:break-word;word-break:break-word;min-width:0;transition:all .2s}.mcq-card:hover{box-shadow:var(--shadow-md);border-color:var(--color-primary)}.question-number{background:var(--color-primary);color:#fff;font-size:var(--font-size-sm);border-radius:20px;margin-bottom:2px;padding:5px 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#f59e0b4d!important}.badge-purple{color:#9333ea!important;background:#a855f71f!important;border:1px solid #a855f74d!important}.badge-blue{color:#2563eb!important;background:#3b82f61f!important;border:1px solid #3b82f64d!important}.badge-course{background:var(--color-bg-subtle)!important;color:var(--color-text-secondary)!important;border:1px solid var(--color-border)!important}.badge-chapter-num{background:var(--color-bg-subtle)!important;color:var(--color-text-muted)!important;border:1px solid var(--color-border)!important}.mcq-tags-scroller-bar{align-items:center;gap:6px;width:100%;min-width:0;margin-bottom:12px;display:flex;position:relative}.mcq-tags-scroll-container{white-space:nowrap;scroll-behavior:smooth;-webkit-overflow-scrolling:touch;flex:auto;align-items:center;gap:6px;min-width:0;padding:2px;display:flex;overflow:auto 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