:root{--primary: #0f2027;--primary-light: #203a43;--secondary: #2c5364;--accent: #FFD700;--text-dark: #2d3436;--bg-light: #f1f2f6;--white: #ffffff;--shadow: 0 10px 30px rgba(0,0,0,.1);--radius: 12px}*{box-sizing:border-box;margin:0;padding:0;font-family:Segoe UI,Roboto,sans-serif}body{background:var(--bg-light);color:var(--text-dark);line-height:1.6}a{text-decoration:none}.hero-small{background:linear-gradient(to right,var(--primary),var(--secondary));padding:40px 20px;color:#fff;text-align:center;box-shadow:0 4px 15px #0003;margin-bottom:30px}.hero-content-box{max-width:800px;margin:0 auto}.hero-small h1{font-size:2.5rem;margin:10px 0}.badge-exam{background:var(--accent);color:var(--primary);padding:4px 12px;border-radius:20px;font-weight:700;font-size:.8rem;letter-spacing:1px}.btn-back{display:inline-block;margin-top:15px;color:#ffffffb3;font-weight:600;transition:.3s}.btn-back:hover{color:#fff;transform:translate(-5px)}.container{max-width:1000px;margin:0 auto 60px;padding:0 20px}.nav-tabs-wrapper{display:flex;justify-content:center;gap:20px;margin-bottom:30px}.tab-btn{background:#fff;border:none;padding:15px 30px;border-radius:50px;font-size:1rem;font-weight:600;color:var(--secondary);cursor:pointer;box-shadow:0 4px 10px #0000000d;transition:all .3s ease}.tab-btn.active{background:var(--secondary);color:#fff;transform:translateY(-2px);box-shadow:0 8px 20px #2c53644d}.tab-content{display:none;animation:fadeIn .5s ease}.tab-content.active{display:block}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.intro-text{background:#dff9fb;color:#130f40;padding:15px;border-radius:var(--radius);border-left:5px solid #22a6b3;margin-bottom:30px}.scenario-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);margin-bottom:30px;border:1px solid rgba(0,0,0,.05)}.card-header{background:#f8f9fa;padding:20px 25px;border-bottom:1px solid #eee;display:flex;justify-content:space-between;align-items:center}.card-header h3{margin:0;font-size:1.2rem;color:var(--primary);display:flex;align-items:center;gap:10px}.exo-number{background:var(--primary);color:#fff;width:30px;height:30px;display:flex;align-items:center;justify-content:center;border-radius:50%;font-size:.9rem}.difficulty{font-size:.8rem;padding:4px 12px;border-radius:12px;font-weight:700;text-transform:uppercase}.medium{background:#ffeaa7;color:#d35400}.hard{background:#ff7675;color:#fff}.scenario-body{padding:30px}.text-content{font-size:1.05rem;color:#444;margin-bottom:20px;line-height:1.8;text-align:justify}.btn-reveal{background:var(--primary);color:#fff;border:none;padding:12px 25px;border-radius:6px;font-weight:600;cursor:pointer;transition:.3s;width:100%;text-align:center}.btn-reveal:hover{background:var(--secondary)}.correction-box{margin-top:20px;border-top:2px dashed #eee;padding-top:20px}.correction-box.hidden{display:none}.analysis{background:#e3f2fd;padding:15px;border-radius:8px;margin-bottom:15px;font-size:.95rem}.analysis ul{margin-left:20px;margin-top:10px}.mapping-result{background:#2d3436;color:#dfe6e9;padding:20px;border-radius:8px;font-family:monospace;position:relative}.mapping-result pre{white-space:pre-wrap;font-size:.95rem;margin-top:10px;line-height:1.5}.mapping-result u{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px;color:#74b9ff}.mapping-result .fk{color:#fab1a0;font-style:italic}.mapping-result .comment{color:#636e72;display:block;margin-top:5px;font-style:italic;font-size:.85rem}.note{margin-top:10px;color:#b2bec3;font-size:.85rem;font-style:italic}.mcd-visual-guide{display:grid;gap:20px}.guide-item{background:#f1f2f6;padding:15px;border-radius:8px;display:flex;align-items:center;gap:20px}.guide-diagram{font-weight:700;background:#fff;padding:10px;border:2px solid var(--primary);border-radius:4px}.hero-split{display:flex;min-height:100vh}.hero-left,.hero-right{flex:1;display:flex;align-items:center;justify-content:center;padding:40px;transition:.4s ease}.hero-left{background:#fff}.hero-right{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff}.hero-left:hover{flex:1.1;background:#fcfcfc}.hero-right:hover{flex:1.1}@media (max-width: 768px){.hero-split,.nav-tabs-wrapper{flex-direction:column}.hero-left,.hero-right{padding:60px 20px}}