*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;color:#333}.container{max-width:1200px;margin:0 auto;padding:40px 20px}.header{text-align:center;color:#fff;margin-bottom:40px}.header h1{font-size:2.5rem;margin-bottom:10px;text-shadow:2px 2px 4px rgba(0,0,0,.2)}.nav-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px;margin-bottom:40px}.nav-card{background:#fff;border-radius:20px;padding:40px 30px;text-align:center;cursor:pointer;transition:all .3s ease;box-shadow:0 10px 30px #0003}.nav-card:hover{transform:translateY(-10px);box-shadow:0 20px 40px #0000004d}.nav-card .icon{font-size:3.5rem;margin-bottom:20px}.nav-card h2{color:#333;font-size:1.5rem;margin-bottom:15px}.nav-card p{color:#666;font-size:.95rem;line-height:1.6}.form-card{background:#fff;border-radius:15px;padding:30px;margin-bottom:30px;box-shadow:0 10px 30px #0003}.form-card h2{color:#667eea;margin-bottom:20px;font-size:1.8rem}.form-group{margin-bottom:15px}.form-group label{display:block;margin-bottom:5px;color:#555;font-weight:600}.form-group input{width:100%;padding:12px;border:2px solid #e0e0e0;border-radius:8px;font-size:1rem;transition:border-color .3s}.form-group input:focus{outline:none;border-color:#667eea}.btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:12px 30px;border-radius:8px;font-size:1rem;cursor:pointer;font-weight:600;transition:all .3s ease}.btn:hover{transform:scale(1.02);box-shadow:0 5px 15px #667eea66}.btn-secondary{background:#6c757d;margin-right:10px}.list-card{background:#fff;border-radius:15px;padding:30px;box-shadow:0 10px 30px #0003}.list-card h2{color:#667eea;margin-bottom:20px;font-size:1.8rem}.item-list{list-style:none}.item-list li{background:#f8f9fa;padding:15px 20px;margin-bottom:10px;border-radius:8px;border-left:4px solid #667eea;display:flex;justify-content:space-between;align-items:center}.item-list li strong{color:#333}.error-message{background:#f8d7da;color:#721c24;padding:15px;border-radius:8px;border:1px solid #f5c6cb;margin-bottom:20px}.success-message{background:#d4edda;color:#155724;padding:15px;border-radius:8px;border:1px solid #c3e6cb;margin-bottom:20px}.footer{text-align:center;color:#fff;margin-top:60px;padding:20px;opacity:.9}@media (max-width: 768px){.header h1{font-size:2rem}.nav-cards{grid-template-columns:1fr}}