*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,sans-serif;line-height:1.5;background-color:#f9fafb}.app-container{max-width:1200px;margin:2rem auto;padding:0 1rem;display:grid;grid-template-columns:2fr 1fr;gap:2rem}.preview{padding:2rem;border-radius:1rem;min-height:500px;display:flex;flex-direction:column;gap:2rem}.options-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}.option-button{padding:1rem;border:none;border-radius:.5rem;cursor:pointer;transition:background-color .2s ease-in-out}.option-button:hover{background-color:var(--hover-color)!important}.check-answer-button{padding:1rem 2rem;border:none;border-radius:.5rem;cursor:pointer;transition:background-color .2s ease-in-out;margin-top:auto;align-self:center}.check-answer-button:hover{background-color:var(--hover-color)!important}.controls{background-color:#fff;padding:2rem;border-radius:1rem;box-shadow:0 1px 3px #0000001a;height:fit-content}.control-group{margin-bottom:1.5rem}.control-group:last-child{margin-bottom:0}.control-group label{display:block;margin-bottom:.5rem;font-weight:500;color:#374151}.control-group select{width:100%;padding:.5rem;border:1px solid #d1d5db;border-radius:.375rem;background-color:#fff;font-size:.875rem;color:#1f2937;cursor:pointer}.control-group select:focus{outline:none;border-color:#3b82f6;ring:2px solid #bfdbfe}@media (max-width: 768px){.app-container{grid-template-columns:1fr}.preview{min-height:400px}}