*{margin:0;padding:0;box-sizing:border-box}body{overflow:hidden;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:#1a1a1a;color:#e0e0e0}canvas{display:block}.panel{position:fixed;background-color:#2a2a2a;border-radius:8px;box-shadow:0 4px 12px #00000080;min-width:300px;max-width:350px;z-index:1000}#controls-panel{top:20px;left:20px}#measurements-panel{top:20px;right:20px}.panel-header{background:linear-gradient(135deg,#667eea,#764ba2);padding:15px 20px;border-radius:8px 8px 0 0;cursor:pointer;display:flex;justify-content:space-between;align-items:center;-webkit-user-select:none;user-select:none}.panel-header h2{font-size:18px;font-weight:600;margin:0;color:#fff}.toggle-icon{font-size:14px;transition:transform .3s ease;color:#fff}.panel-header:hover{background:linear-gradient(135deg,#7b94f5,#8b5cb8)}.panel-content{padding:20px;max-height:600px;overflow-y:auto;transition:max-height .3s ease,padding .3s ease}.panel-content.collapsed{max-height:0;padding:0 20px;overflow:hidden}.panel-content.collapsed+.panel-header .toggle-icon{transform:rotate(-90deg)}.control-group{margin-bottom:18px}.control-group label{display:block;margin-bottom:6px;font-size:14px;font-weight:500;color:#b0b0b0}.control-group input[type=number],.control-group select{width:calc(100% - 50px);padding:8px 12px;background-color:#3a3a3a;border:1px solid #4a4a4a;border-radius:4px;color:#e0e0e0;font-size:14px;margin-right:8px}.control-group input[type=range]{width:calc(100% - 60px);margin-right:10px;accent-color:#667eea}.control-group input[type=number]:focus,.control-group select:focus{outline:none;border-color:#667eea}.control-group .unit{color:#888;font-size:13px}.button-group{display:flex;gap:10px;margin-top:20px}.btn{flex:1;padding:10px 20px;border:none;border-radius:4px;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s ease}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 4px 8px #667eea66}.btn-primary:disabled{background:#555;cursor:not-allowed;transform:none}.btn-secondary{background-color:#3a3a3a;color:#e0e0e0;border:1px solid #4a4a4a}.btn-secondary:hover{background-color:#4a4a4a}.measurement-row{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid #3a3a3a}.measurement-row:last-child{border-bottom:none}.measurement-row label{font-size:14px;color:#b0b0b0;flex:1}.measurement-row span{font-size:14px;font-weight:600;color:#e0e0e0;text-align:right}.measurement-row .unit{color:#888;font-weight:400;margin-left:5px;min-width:70px}#speed-value{display:inline-block;min-width:25px;text-align:right;color:#e0e0e0}.panel-content::-webkit-scrollbar{width:8px}.panel-content::-webkit-scrollbar-track{background:#2a2a2a}.panel-content::-webkit-scrollbar-thumb{background:#4a4a4a;border-radius:4px}.panel-content::-webkit-scrollbar-thumb:hover{background:#5a5a5a}