.tabs{display:flex;justify-content:center;gap:10px;margin-bottom:30px;flex-wrap:wrap}.tab-btn{padding:10px 25px;border:1px solid #ddd;background:#fff;border-radius:30px;cursor:pointer;font-weight:700;color:#555;transition:.3s}.tab-btn.active{background:var(--primary, #004E92);color:#fff;border-color:var(--primary, #004E92)}.tab-content{display:none}.tab-content.active{display:block;animation:fadeIn .5s}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.exo-block{background:#fff;border-radius:8px;padding:25px;margin-bottom:30px;box-shadow:0 4px 15px #0000000d;border-left:5px solid var(--primary, #004E92)}.exo-title{font-size:1.3rem;color:#2c3e50;margin-bottom:15px;display:flex;justify-content:space-between;align-items:center}.badge{background:var(--isep-yellow, #f1c40f);color:#333;padding:3px 10px;border-radius:10px;font-size:.8rem;text-transform:uppercase}.scenario-text{background:#f8f9fa;padding:20px;border-radius:5px;line-height:1.8;text-align:justify;border:1px solid #eee;margin-bottom:20px;font-size:1.05rem}.btn-reveal{background:var(--primary, #004E92);color:#fff;border:none;padding:12px 20px;border-radius:5px;cursor:pointer;font-size:1rem;font-weight:600;width:100%;text-align:center;transition:.3s}.btn-reveal:hover{background:#036}.correction{margin-top:20px;display:none;border-top:2px dashed #ddd;padding-top:20px}.db-schema{font-family:Consolas,monospace;background:#282c34;color:#abb2bf;padding:20px;border-radius:5px;overflow-x:auto}.table-name{color:#e06c75;font-weight:700}.pk{color:#61afef;text-decoration:underline}.fk{color:#98c379;font-style:italic}.interpretation{background:#e8f6f3;color:#135946;padding:15px;border-radius:5px;border:1px solid #a9dfbf}