:root{--primary:#4361ee;--primary-dark:#3a56d4;--secondary:#7209b7;--success:#06d6a0;--danger:#ef476f;--warning:#ffd166;--info:#118ab2;--light:#f8f9fa;--dark:#212529;--gray:#6c757d;--light-gray:#e9ecef;--border-radius:12px;--box-shadow:0 8px 25px rgba(0, 0, 0, 0.1);--transition:all 0.3s ease}*{margin:0;padding:0;box-sizing:border-box}body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#f5f7fa 0,#e4edf5 100%);color:var(--dark);margin:0;padding:20px;box-sizing:border-box}.container{background-color:#fff;padding:30px 40px;border-radius:var(--border-radius);box-shadow:var(--box-shadow);text-align:center;width:100%;max-width:800px;box-sizing:border-box;margin-bottom:20px;position:relative;overflow:hidden}.container::before{content:'';position:absolute;top:0;left:0;right:0;height:5px;background:linear-gradient(90deg,var(--primary),var(--secondary))}h1{color:var(--primary);margin-bottom:30px;font-size:2.2em;display:flex;align-items:center;justify-content:center;gap:12px}footer{margin-top:20px;color:var(--gray);font-size:.9em;text-align:center;padding:15px}.tools-list{width:100%;list-style:none;padding:0}.tool-item{display:flex;align-items:center;padding:20px;margin-bottom:15px;border-radius:var(--border-radius);background-color:var(--light);transition:var(--transition);text-decoration:none;color:var(--dark);border:1px solid var(--light-gray)}.tool-item:hover{transform:translateY(-3px);box-shadow:0 5px 15px rgba(0,0,0,.1);border-color:var(--primary)}.tool-icon{width:60px;height:60px;border-radius:12px;object-fit:cover;margin-right:20px;flex-shrink:0;box-shadow:0 3px 10px rgba(0,0,0,.1)}div.tool-icon{display:flex;align-items:center;justify-content:center;font-size:28px;color:#fff}.tool-info{flex-grow:1;text-align:left}.tool-info h2{color:var(--primary);margin-bottom:5px;font-size:1.3em}.tool-info p{color:var(--gray);font-size:.95em;line-height:1.5}.tool-arrow{color:var(--primary);font-size:1.2em;margin-left:15px}.error-code{font-size:6em;font-weight:700;color:var(--danger);margin:20px 0;text-shadow:3px 3px 0 rgba(0,0,0,.1)}.error-message{font-size:1.5em;margin-bottom:30px;color:var(--dark)}.error-description{color:var(--gray);margin-bottom:40px;line-height:1.6;max-width:600px;margin-left:auto;margin-right:auto}.error-illustration{font-size:8em;color:var(--danger);margin:20px 0;opacity:.8}.action-buttons{display:flex;justify-content:center;gap:15px;margin-top:30px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;background-color:var(--primary);color:#fff;text-decoration:none;border-radius:var(--border-radius);font-weight:600;transition:var(--transition);border:none;cursor:pointer;box-shadow:0 4px 15px rgba(67,97,238,.3)}.btn:hover{background-color:var(--primary-dark);transform:translateY(-2px);box-shadow:0 6px 20px rgba(67,97,238,.4)}.btn-secondary{background-color:var(--secondary);box-shadow:0 4px 15px rgba(114,9,183,.3)}.btn-secondary:hover{background-color:#6415a0;box-shadow:0 6px 20px rgba(114,9,183,.4)}.btn-outline{background-color:transparent;color:var(--primary);border:2px solid var(--primary);box-shadow:none}.btn-outline:hover{background-color:var(--primary);color:#fff}.search-box{display:flex;max-width:500px;margin:30px auto}.search-input{flex-grow:1;padding:12px 16px;border:2px solid var(--light-gray);border-radius:var(--border-radius) 0 0 var(--border-radius);font-size:1em;outline:0;transition:var(--transition)}.search-input:focus{border-color:var(--primary)}.search-btn{padding:12px 20px;background-color:var(--primary);color:#fff;border:none;border-radius:0 var(--border-radius) var(--border-radius) 0;cursor:pointer;transition:var(--transition)}.search-btn:hover{background-color:var(--primary-dark)}@media (max-width:768px){.container{padding:20px}h1{font-size:1.8em}.tool-item{flex-direction:column;text-align:center;padding:15px}.tool-icon{margin-right:0;margin-bottom:15px}.tool-info{text-align:center}.tool-arrow{display:none}.error-code{font-size:4em}.error-message{font-size:1.2em}.error-illustration{font-size:5em}.action-buttons{flex-direction:column;align-items:center}.btn{width:100%;justify-content:center}}