html,body,#app{background:#f2f2f2;width:100%;height:100%;margin:0;font-family:Arial,sans-serif;overflow:hidden}#app{flex-direction:column;display:flex}.toolbar{box-sizing:border-box;background:#fff;border-bottom:1px solid #ddd;align-items:center;gap:10px;height:54px;padding:0 12px;display:flex}#viewer{background:#e9e9e9;width:100%;height:calc(100% - 54px)}button,input[type=file]{font-size:14px}#status{color:#444;margin-left:auto}.measure-info{color:#333;background:#fffffff5;border:1px solid #d6d6d6;border-radius:8px;min-width:180px;padding:10px 12px;font-size:13px;line-height:1.5;position:fixed;top:66px;right:12px;box-shadow:0 4px 14px #00000014}.hidden{display:none}.active-tool{background:#d9ecff;border:1px solid #7db7ff}