:root{--bg: #1e1e1e;--bg-panel: #252526;--fg: #d4d4d4;--accent: #007acc;--ok: #4ec9b0;--err: #f44747}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;background:var(--bg);color:var(--fg);font-family:system-ui,sans-serif}.layout{display:flex;flex-direction:column;height:100vh}.header{display:flex;align-items:center;gap:12px;padding:8px 16px;background:var(--bg-panel);border-bottom:1px solid #3e3e42}.header h1{font-size:16px}.btn{padding:6px 14px;border:none;border-radius:4px;cursor:pointer;font-size:13px;background:var(--accent);color:#fff}.btn:hover{background:#17b}.main{display:flex;flex:1;overflow:hidden}.editor-panel{width:440px;display:flex;flex-direction:column;background:var(--bg);border-right:1px solid #3e3e42}.editor-toolbar{padding:6px 10px;background:var(--bg-panel);border-bottom:1px solid #3e3e42;font-size:12px;display:flex;justify-content:space-between}#editor-mount{flex:1;overflow:hidden}.cm-editor{height:100%}.viewer-panel{flex:1;display:flex;flex-direction:column;position:relative;background:#0d0d0d}#viewer{flex:1;position:relative}#viewer canvas{display:block;width:100%!important;height:100%!important}.loading{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:#0d0d0d;z-index:20;color:gray;font-size:14px}.side-panel{width:280px;display:flex;flex-direction:column;background:var(--bg);border-left:1px solid #3e3e42}.panel-tabs{display:flex;background:var(--bg-panel);border-bottom:1px solid #3e3e42}.panel-tab{flex:1;padding:8px;font-size:12px;text-align:center;cursor:pointer;color:gray;background:transparent;border:none;border-bottom:2px solid transparent}.panel-tab.active{color:var(--fg);border-bottom-color:var(--accent);background:var(--bg)}.panel-content{flex:1;overflow:auto;padding:10px;font-size:12px;display:none}.panel-content.active{display:block}.panel-content pre{font-family:Fira Code,Consolas,monospace;white-space:pre-wrap;word-break:break-all}.error-item{padding:4px 6px;margin-bottom:3px;border-radius:3px;font-size:11px;color:var(--err);background:#f4474714;border-left:2px solid var(--err)}.ok-item{padding:4px 6px;font-size:11px;color:var(--ok)}.inspector-group{margin-bottom:14px}.inspector-group-title{font-size:11px;color:gray;text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px;border-bottom:1px solid #3e3e42;padding-bottom:2px}.inspector-row{display:flex;align-items:center;gap:8px;margin-bottom:8px}.inspector-label{width:90px;font-size:12px;color:var(--fg);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.inspector-input{flex:1;background:#3c3c3c;border:1px solid #3e3e42;color:var(--fg);padding:4px 6px;border-radius:3px;font-size:12px}.inspector-input:focus{outline:none;border-color:var(--accent)}.inspector-slider{flex:1;accent-color:var(--accent)}.inspector-color{width:28px;height:22px;border:1px solid #3e3e42;border-radius:3px;padding:0;cursor:pointer;background:none}.inspector-checkbox{accent-color:var(--accent);width:16px;height:16px}.inspector-empty{color:gray;font-style:italic;padding:8px 0}.inspector-value-display{min-width:36px;text-align:right;font-size:11px;color:#aaa;font-family:Fira Code,Consolas,monospace}