:root{--bg-color: #1a1a1a;--panel-bg: rgba(30, 30, 30, .8);--text-color: #ffffff;--accent-color: #646cff;--danger-color: #ff4444}body{margin:0;padding:0;overflow:hidden;font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-color)}#app{position:absolute;top:0;left:0;width:100vw;height:100vh;z-index:1}#ui-container{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:10}#lang-container{position:absolute;top:20px;left:20px;pointer-events:auto}#toolbar{position:absolute;bottom:20px;left:50%;transform:translate(-50%);background:var(--panel-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:10px 20px;border-radius:12px;display:flex;gap:10px;pointer-events:auto;box-shadow:0 4px 6px #0000004d;border:1px solid rgba(255,255,255,.1)}.tool-btn{background:#ffffff1a;border:none;color:#fff;padding:8px 16px;border-radius:6px;cursor:pointer;transition:background .2s;font-weight:500}.tool-btn:hover{background:#fff3}.tool-btn.active{background:var(--accent-color)}.tool-btn.danger{color:var(--danger-color)}.tool-btn.danger:hover{background:#ff44441a}.separator{width:1px;background:#fff3;margin:0 5px}#properties-panel{position:absolute;top:20px;right:20px;width:200px;background:var(--panel-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:15px;border-radius:12px;pointer-events:auto;box-shadow:0 4px 6px #0000004d;border:1px solid rgba(255,255,255,.1);transition:opacity .2s,transform .2s}#properties-panel.hidden{opacity:0;transform:translate(20px);pointer-events:none}h3{margin:0 0 15px;font-size:16px;font-weight:600}.control-group{margin-bottom:15px;display:flex;flex-direction:column;gap:5px}label{font-size:12px;color:#aaa}input[type=color]{width:100%;height:30px;border:none;border-radius:4px;cursor:pointer;background:none}input[type=range]{flex:1;cursor:pointer}button.danger{background:#ff44441a;color:var(--danger-color);border:1px solid var(--danger-color);padding:8px;border-radius:4px;cursor:pointer;width:100%}button.danger:hover{background:var(--danger-color);color:#fff}.scale-control-wrapper{display:flex;align-items:center;gap:8px}.scale-value{min-width:40px;text-align:right;font-size:12px;color:#aaa}