body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}:root{--primary-color:#ff6b35;--primary-dark:#e55a2b;--primary-light:#ff8c5a;--secondary-color:#3498db;--secondary-dark:#2980b9;--secondary-light:#5dade2;--success-color:#27ae60;--success-dark:#229954;--success-light:#58d68d;--danger-color:#e74c3c;--danger-dark:#c0392b;--danger-light:#ec7063;--warning-color:#f39c12;--warning-dark:#d68910;--warning-light:#f7dc6f;--gray-100:#f8f9fa;--gray-200:#e9ecef;--gray-300:#dee2e6;--gray-400:#ced4da;--gray-500:#adb5bd;--gray-600:#6c757d;--gray-700:#495057;--gray-800:#343a40;--gray-900:#212529;--dark-bg:#1a1a1a;--dark-surface:#2a2a2a;--dark-border:#333;--dark-text:#fff;--dark-text-secondary:#ccc;--glass-bg:#ffffff1a;--glass-border:#fff3;--glass-shadow:0 8px 32px 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#ffffff4d;border-radius:8px;border-radius:var(--radius-md);color:#212529;color:var(--gray-900);padding:1rem;padding:var(--spacing-md);transition:all .3s ease;transition:all var(--transition-normal)}.rounded-card-compact:hover{background:#fffffff2;box-shadow:0 4px 6px #0000001a;box-shadow:var(--shadow-md)}.rounded-card-option{align-items:center;background:#ffffff0d;border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:4px;border-radius:var(--radius-sm);display:flex;gap:.5rem;gap:var(--spacing-sm);padding:.5rem 1rem;padding:var(--spacing-sm) var(--spacing-md)}.rounded-card-option:hover{background:#ffffff1a}.rounded-card-option.correct{background:#27ae6033;border-color:#27ae60;border-color:var(--success-color);color:#27ae60;color:var(--success-color)}.rounded-card-option.incorrect{background:#e74c3c33;border-color:#e74c3c;border-color:var(--danger-color);color:#e74c3c;color:var(--danger-color)}.rounded-card-option:disabled{cursor:not-allowed;opacity:.6}.text-title-xl{color:#fffffff2;font-size:1.875rem;font-size:var(--font-size-3xl);font-weight:700;line-height:1.2;margin:0}.text-title-lg{font-size:1.5rem;font-size:var(--font-size-2xl);line-height:1.3}.text-title-lg,.text-title-md{color:#fffffff2;font-weight:600;margin:0}.text-title-md{font-size:1.25rem;font-size:var(--font-size-xl);line-height:1.4}.text-title-sm{color:#fffffff2;font-weight:600;line-height:1.4}.text-body-lg,.text-title-sm{font-size:1.125rem;font-size:var(--font-size-lg);margin:0}.text-body-lg,.text-body-md{color:#ffffffe6;font-weight:400;line-height:1.5}.text-body-md{font-size:1rem;font-size:var(--font-size-base);margin:0}.text-body-sm{color:#ffffffd9;font-size:.875rem;font-size:var(--font-size-sm);font-weight:400;line-height:1.5;margin:0}.text-caption{color:#ffffffb3;font-size:.75rem;font-size:var(--font-size-xs);font-weight:500;letter-spacing:.5px;line-height:1.4;margin:0;text-transform:uppercase}.content-container{margin:0 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var(--secondary-color);border-radius:8px;border-radius:var(--radius-md);color:#fff;color:var(--dark-text);font-size:.875rem;font-size:var(--font-size-sm);line-height:1.5;margin-top:1rem;margin-top:var(--spacing-md);padding:1rem;padding:var(--spacing-md)}.content-explanation-title{color:#3498db;color:var(--secondary-color);font-size:.875rem;font-size:var(--font-size-sm);font-weight:600;letter-spacing:.5px;margin:0 0 .5rem;margin:0 0 var(--spacing-sm) 0;text-transform:uppercase}.content-filters{align-items:center;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:12px;border-radius:var(--radius-lg);display:flex;flex-wrap:wrap;gap:1rem;gap:var(--spacing-md);margin-bottom:2rem;margin-bottom:var(--spacing-xl);padding:1.5rem;padding:var(--spacing-lg)}.content-filter-group{display:flex;flex-direction:column;gap:.25rem;gap:var(--spacing-xs);min-width:150px}.content-filter-label{font-weight:600}.content-filter-label,.content-filter-select{color:#fff;color:var(--dark-text);font-size:.875rem;font-size:var(--font-size-sm)}.content-filter-select{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);background:#ffffff1a;background:var(--glass-bg);border:1px solid #ced4da;border:1px solid var(--gray-400);border-radius:8px;border-radius:var(--radius-md);padding:.5rem;padding:var(--spacing-sm);transition:all .3s ease;transition:all 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