:root{--bg-panel: rgba(15, 15, 20, .85);--border-color: rgba(255, 255, 255, .1);--text-main: #ffffff;--text-dim: #aaaaaa;--accent: #00e5ff;--accent-hover: #00b3cc;--bg-input: rgba(0, 0, 0, .5)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,sans-serif;overflow:hidden;background-color:#000;color:var(--text-main)}#canvas-container{position:absolute;top:0;left:0;width:100vw;height:100vh;z-index:1}#ui-panel{position:absolute;top:20px;right:20px;width:340px;max-height:calc(100vh - 40px);background:var(--bg-panel);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:12px;z-index:10;display:flex;flex-direction:column;overflow-y:auto;box-shadow:0 10px 30px #00000080}#ui-panel::-webkit-scrollbar{width:6px}#ui-panel::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}.panel-header{padding:20px;border-bottom:1px solid var(--border-color)}.panel-header h1{font-size:24px;font-weight:600;letter-spacing:1px}.panel-header p{color:var(--accent);font-size:14px;text-transform:uppercase;letter-spacing:2px;margin-top:4px}.tabs{display:flex;border-bottom:1px solid var(--border-color)}.tab-btn{flex:1;background:none;border:none;color:var(--text-dim);padding:12px 0;font-size:11px;cursor:pointer;transition:all .2s;font-weight:600}.tab-btn:hover{color:var(--text-main);background:#ffffff0d}.tab-btn.active{color:var(--accent);border-bottom:2px solid var(--accent)}.tab-content{display:none;padding:20px}.tab-content.active{display:block;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}.control-group{margin-bottom:16px}.control-group label{display:block;font-size:12px;color:var(--text-dim);margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}select{width:100%;padding:8px 12px;background:var(--bg-input);border:1px solid var(--border-color);color:#fff;border-radius:6px;outline:none;font-family:inherit;cursor:pointer}input[type=range]{width:100%;accent-color:var(--accent);cursor:pointer}input[type=color]{width:100%;height:36px;border:1px solid var(--border-color);border-radius:6px;background:var(--bg-input);cursor:pointer;padding:2px}.button-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.button-row{display:flex;gap:8px;flex-wrap:wrap}.flex-row{display:flex;gap:8px;align-items:center}button{background:var(--bg-input);border:1px solid var(--border-color);color:var(--text-main);padding:8px 12px;border-radius:6px;cursor:pointer;font-family:inherit;font-size:13px;transition:all .2s}button:hover:not(:disabled){background:#ffffff1a;border-color:var(--accent)}button.active,button.toggle-btn.active{background:#00e5ff26;border-color:var(--accent);color:var(--accent)}button:disabled{opacity:.3;cursor:not-allowed}.action-btn{width:100%;background:#ffffff1a;margin-top:10px;font-weight:600}.action-btn:hover{background:#fff3}hr{border:0;border-top:1px solid var(--border-color);margin:16px 0}.hint{font-size:11px;color:var(--text-dim);margin-top:6px;font-style:italic}#loading-overlay{position:absolute;top:0;left:0;width:100vw;height:100vh;background:#000;z-index:100;display:flex;flex-direction:column;justify-content:center;align-items:center;transition:opacity .5s ease;opacity:0;pointer-events:none}#loading-overlay.visible{opacity:1;pointer-events:all}.spinner{width:40px;height:40px;border:3px solid rgba(255,255,255,.1);border-top:3px solid var(--accent);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:20px}@keyframes spin{to{transform:rotate(360deg)}}