*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#fff;min-height:100vh;padding:20px}#control-panel{display:flex;align-items:center;justify-content:center;gap:10px;padding:15px;background:#f5f5f5;border:1px solid #ddd;border-radius:8px;margin-bottom:20px;position:relative}#control-panel button{width:44px;height:44px;border:1px solid #ccc;border-radius:8px;background:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}#control-panel button:hover{background:#e3f2fd;border-color:#2196f3}#control-panel button:active{background:#bbdefb}#control-panel button:disabled{opacity:.5;cursor:not-allowed}#step-indicator{margin-left:20px;font-size:14px;color:#666;font-weight:500}.control-hint{position:absolute;top:100%;left:50%;transform:translate(-50%);margin-top:10px;opacity:0;transition:opacity .3s,transform 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4}.connection-line.active{stroke:#2196f3;stroke-width:3;stroke-dasharray:none}.data-packet{fill:#2196f3;filter:url(#glow)}#os-section{flex:0 0 45%;max-width:45%;height:65vh;border:2px solid #333;border-radius:8px;padding:25px 20px 20px;position:relative;background:#fff;z-index:1;display:flex;flex-direction:column}#os-label{position:absolute;top:-12px;left:20px;background:#fff;padding:0 10px;font-size:14px;color:#333}#browser-window{border:2px solid #333;border-radius:8px;overflow:hidden;flex:1;min-height:0;display:flex;flex-direction:column;position:relative}#browser-toolbar{background:#f0f0f0;padding:8px;border-bottom:1px solid #ccc;display:flex;align-items:center;gap:8px}#browser-buttons{display:flex;gap:4px}#browser-buttons button{width:28px;height:28px;border:1px solid #ccc;border-radius:4px;background:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center}#browser-buttons 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#444;border-radius:2px;margin-bottom:6px;padding:6px 4px}#dns-server-rack .rack-leds{display:flex;gap:4px;margin-bottom:4px}#dns-query-display{background:#111;color:#4caf50;font-family:monospace;font-size:9px;padding:5px;border-radius:2px;min-height:30px;text-align:left;word-break:break-all}#dns-response-box{position:absolute;top:100%;left:50%;transform:translate(-50%);margin-top:10px;background:#f8f9fa;border:2px solid #dee2e6;border-radius:6px;padding:10px;min-width:280px;max-width:380px;text-align:left;display:none;z-index:10}#dns-response-box.visible{display:block;animation:fadeIn .3s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}#dns-response-title{font-size:11px;font-weight:600;color:#495057;margin-bottom:6px;padding-bottom:4px;border-bottom:1px solid #dee2e6}#dns-response-content{font-family:monospace;font-size:10px;color:#212529;line-height:1.4;max-height:150px;overflow-y:auto}#dns-response-content .response-section{margin-bottom:8px}#dns-response-content .response-label{color:#6c757d;font-weight:500}#dns-response-content .response-value{color:#28a745;word-break:break-all}#dns-response-content .response-error{color:#dc3545}#dns-response-content .server-item{padding:2px 0;border-bottom:1px dotted #e9ecef}#dns-response-content .server-item:last-child{border-bottom:none}.led{width:6px;height:6px;border-radius:50%}.led-green{background:#4caf50;box-shadow:0 0 4px #4caf50}.led-orange{background:#ff9800;box-shadow:0 0 4px #ff9800}.led-red{background:#f44336;box-shadow:0 0 4px #f44336}.blink-1{animation:blink 1s infinite}.blink-2{animation:blink 1.5s infinite;animation-delay:.3s}.blink-3{animation:blink 2s infinite;animation-delay:.7s}.rack-slots{display:flex;gap:2px}.rack-slots:before{content:"";display:block;width:100%;height:3px;background:repeating-linear-gradient(90deg,#333 0px 3px,#1a1a1a 3px 5px)}#right-section{position:relative;z-index:1;margin-left:auto}#dns-circles{display:flex;flex-direction:column;gap:25px;align-items:center}.dns-circle{width:110px;height:110px;border:2px solid #333;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#fff;transition:all .3s}.dns-circle.active{border-color:#2196f3;border-width:3px;box-shadow:0 0 20px #2196f366}.circle-content{text-align:center;padding:8px}.circle-title{font-size:11px;color:#333;line-height:1.3}.server-list{font-family:monospace;font-size:8px;color:#666;margin-top:4px;max-height:35px;overflow:hidden}#status-log{margin-top:20px;padding:15px;background:#f5f5f5;border:1px solid #ddd;border-radius:8px;max-height:200px;overflow-y:auto}#log-title{font-size:14px;font-weight:500;margin-bottom:10px;color:#333}#log-entries{font-family:monospace;font-size:12px}.log-entry{padding:4px 0;border-bottom:1px solid #eee;color:#333}.log-entry:last-child{border-bottom:none}.log-entry .timestamp{color:#999;margin-right:10px}.log-entry.step-root{color:#e91e63}.log-entry.step-tld{color:#9c27b0}.log-entry.step-auth{color:#3f51b5}.log-entry.step-resolved{color:#4caf50;font-weight:700}.log-entry.step-cached{color:#ff9800}@keyframes pulse{0%,to{transform:scale(1);opacity:1}50%{transform:scale(1.3);opacity:.8}}.data-packet{animation:pulse .5s ease-in-out infinite}