:root{--primary-color:#3a5bef;--primary-dark:#2a4adf;--primary-light:#e6ebff;--secondary-color:#2c3e50;--text-color:#333;--text-light:#666;--light-gray:#e9ecef;--dark-gray:#5a6573;--success-color:#28a745;--error-color:#dc3545;--border-radius:8px;--box-shadow:0 4px 6px rgba(0,0,0,.1);--transition:all .3s ease}body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:var(--text-color);background-color:#f5f7ff;margin:0;padding:0}.container{max-width:1000px;margin:20px auto;padding:0 20px}.back-link{color:#fff;text-decoration:none;display:inline-block;margin:0 0 20px;font-size:20px;background-color:#242d54;padding:8px 16px;border-radius:var(--border-radius);box-shadow:var(--box-shadow);transition:var(--transition)}.back-link:hover{background-color:#2d3748;transform:translateY(-2px)}.tool-container{display:flex;flex-direction:column;gap:20px;margin-bottom:30px}.input-group{display:flex;flex-direction:column;gap:15px}.input-row{display:flex;gap:15px}.input-col{flex:1;display:flex;flex-direction:column}label{font-weight:600;margin-bottom:5px}input[type="text"],select{padding:12px 15px;border:1px solid var(--light-gray);border-radius:var(--border-radius);font-size:16px;transition:var(--transition)}input[type="text"]:focus,select:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 3px rgb(74 107 255 / .2)}button{background-color:var(--primary-dark);color:#fff;border:none;padding:12px 20px;border-radius:var(--border-radius);cursor:pointer;font-size:16px;font-weight:700;transition:var(--transition)}button:hover{background-color:var(--primary-color)}.result-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}.result-item{margin-bottom:15px}.result-label{font-weight:600;color:var(--primary-color);margin-bottom:5px}.result-value{background-color:var(--light-gray);padding:10px 15px;border-radius:var(--border-radius);word-break:break-all}.ip-list{max-height:300px;overflow-y:auto;background-color:var(--light-gray);padding:15px;border-radius:var(--border-radius);font-family:monospace;line-height:1.8}.error{color:var(--error-color);margin-top:10px;font-weight:600}.calculator-panel{background-color:#fff;border-radius:var(--border-radius);box-shadow:var(--box-shadow);padding:25px;margin-bottom:30px}.panel-header{display:flex;align-items:center;gap:15px;margin-bottom:20px}.panel-header h2{margin:0;color:var(--primary-color)}.cloud-platforms{display:flex;gap:15px;margin-bottom:20px}.cloud-platform{flex:1;min-width:100px;text-align:center;padding:15px 10px;border-radius:var(--border-radius);cursor:pointer;transition:all 0.3s ease;border:1px solid var(--light-gray);background-color:#f8f9fa}.cloud-platform:hover{border-color:var(--primary-color)}.cloud-platform.active{border-color:var(--primary-color);background-color:rgb(74 107 255 / .1)}.cidr-control{margin-bottom:20px}.cidr-slider-container{margin-top:10px}.cidr-slider{width:100%;height:8px;-webkit-appearance:none;background:var(--light-gray);border-radius:4px;outline:none;margin-bottom:5px}.cidr-slider::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;background:var(--primary-color);border-radius:50%;cursor:pointer}.cidr-slider::-moz-range-thumb{width:20px;height:20px;background:var(--primary-color);border-radius:50%;cursor:pointer}.mobile-toggle{display:none;background:none;border:none;padding:10px;cursor:pointer;margin-left:auto}.toggle-icon{display:block;width:25px;height:3px;background:var(--secondary-color);position:relative}.toggle-icon::before,.toggle-icon::after{content:'';position:absolute;width:100%;height:100%;background:var(--secondary-color);left:0}.toggle-icon::before{top:-8px}.toggle-icon::after{bottom:-8px}@media (max-width:992px){.mobile-toggle{display:block}.cloud-platforms{flex-wrap:wrap}.cloud-platform{min-width:calc(50% - 15px)}}@media (max-width:768px){.container{padding:15px}.input-row{flex-direction:column}.calculator-panel,.input-section,.result-section{padding:20px}}@media (max-width:480px){.container{padding:10px}.cloud-platform{min-width:100%}}#custom-mask-row.show,#result-section.show,#cloud-results.show{display:block}