*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}:root{--primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--primary-color: #667eea;--secondary-color: #764ba2;--success-color: #28a745;--danger-color: #dc3545;--warning-color: #ffc107;--info-color: #17a2b8;--light-color: #f8f9fa;--dark-color: #343a40;--border-color: #e1e5e9;--shadow: 0 2px 10px rgba(0, 0, 0, .1);--shadow-lg: 0 20px 40px rgba(0, 0, 0, .1);--border-radius: 10px;--transition: all .3s ease}html{font-size:16px;line-height:1.6}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:var(--light-color);color:var(--dark-color);overflow-x:hidden}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2;margin-bottom:1rem}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.5rem}h4{font-size:1.25rem}p{margin-bottom:1rem}a{color:var(--primary-color);text-decoration:none;transition:var(--transition)}a:hover{text-decoration:underline}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.5rem;border:none;border-radius:var(--border-radius);font-weight:600;font-size:1rem;cursor:pointer;transition:var(--transition);text-decoration:none;min-height:48px}.btn-primary{background:var(--primary-gradient);color:#fff}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 20px #667eea4d}.btn-secondary{background:#6c757d;color:#fff}.btn-success{background:var(--success-color);color:#fff}.btn-danger{background:var(--danger-color);color:#fff}.btn-outline{background:transparent;border:2px solid var(--primary-color);color:var(--primary-color)}.btn-outline:hover{background:var(--primary-color);color:#fff}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none!important}.form-group{margin-bottom:1.5rem}.form-label{display:block;margin-bottom:.5rem;font-weight:600;color:var(--dark-color)}.form-input{width:100%;padding:.75rem 1rem;border:2px solid var(--border-color);border-radius:var(--border-radius);font-size:1rem;transition:var(--transition);background:white}.form-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #667eea1a}.form-input:invalid{border-color:var(--danger-color)}.form-input:valid{border-color:var(--success-color)}.card{background:white;border-radius:var(--border-radius);padding:1.5rem;box-shadow:var(--shadow);transition:var(--transition)}.card:hover{box-shadow:var(--shadow-lg)}.alert{padding:1rem;border-radius:var(--border-radius);margin-bottom:1rem;font-weight:500}.alert-success{background:#d4edda;border:1px solid #c3e6cb;color:#155724}.alert-error{background:#f8d7da;border:1px solid #f5c6cb;color:#721c24}.alert-warning{background:#fff3cd;border:1px solid #ffeaa7;color:#856404}.alert-info{background:#e3f2fd;border:1px solid #2196F3;color:#1976d2}.loading{display:inline-block;width:20px;height:20px;border:3px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin 1s ease-in-out infinite}@keyframes spin{to{transform:rotate(360deg)}}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.mb-0{margin-bottom:0}.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.mb-4{margin-bottom:2rem}.mt-0{margin-top:0}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mt-4{margin-top:2rem}.d-flex{display:flex}.d-grid{display:grid}.d-none{display:none}.d-block{display:block}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.align-center{align-items:center}.gap-1{gap:.5rem}.gap-2{gap:1rem}.gap-3{gap:1.5rem}.w-full{width:100%}.h-full{height:100%}@media (max-width: 768px){.container{padding:0 .5rem}h1{font-size:2rem}h2{font-size:1.5rem}.btn{width:100%;padding:1rem}}