*,:before,:after{box-sizing:border-box}body{margin:0;padding:0}*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--primary:#6c63ff;--primary-dark:#5a52d5;--success:#00e676;--bg:#0f0f1a;--bg-card:#1a1a2e;--bg-hover:#252540;--text:#e8e8f0;--text-muted:#88a;--border:#ffffff14;--radius:12px}html,body,#root{background:var(--bg);min-height:100%;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:15px;line-height:1.5}.app{flex-direction:column;min-height:100vh;display:flex}.header{border-bottom:1px solid var(--border);background:linear-gradient(135deg,#1a1a3e,#0f0f1a);align-items:center;gap:16px;padding:14px 20px;display:flex}.logo{align-items:center;gap:8px;display:flex}.logo-icon{font-size:22px}.logo-text{background:linear-gradient(135deg,#a78bfa,#6c63ff);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:20px;font-weight:700}.header-sub{color:var(--text-muted);font-size:13px}.main{flex:1;width:100%;max-width:1400px;margin:0 auto;padding:20px}.upload-zone{border-radius:var(--radius);text-align:center;cursor:pointer;background:var(--bg-card);border:2px dashed #6c63ff66;max-width:600px;margin:40px auto;padding:80px 20px;transition:all .2s}.upload-zone:hover,.upload-zone.drag-over{border-color:var(--primary);background:var(--bg-hover)}.upload-icon{margin-bottom:14px;font-size:52px}.upload-title{margin-bottom:6px;font-size:18px;font-weight:600}.upload-hint{color:var(--text-muted);font-size:13px}.workspace{grid-template-columns:1fr 1fr;align-items:start;gap:16px;display:grid}.left-panel,.right-panel{background:var(--bg-card);border-radius:var(--radius);border:1px solid var(--border);flex-direction:column;display:flex;overflow:hidden}.panel-header{border-bottom:1px solid var(--border);background:#00000040;flex-shrink:0;align-items:center;gap:10px;min-height:42px;padding:10px 14px;display:flex}.panel-title{color:var(--text);white-space:nowrap;font-size:13px;font-weight:600}.panel-tip{color:var(--text-muted);font-size:12px;line-height:1.4}.canvas-wrap{width:100%}.main-canvas{cursor:crosshair;touch-action:none;width:100%;height:auto;display:block}.controls{border-top:1px solid var(--border);flex-shrink:0;gap:8px;padding:12px 14px;display:flex}.btn{cursor:pointer;border:none;border-radius:8px;flex:1;justify-content:center;align-items:center;gap:6px;padding:10px 8px;font-size:14px;font-weight:600;transition:all .18s;display:flex}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff;flex:2}.btn-primary:hover:not(:disabled){background:var(--primary-dark)}.btn-ghost{color:var(--text-muted);border:1px solid var(--border);background:#ffffff0f}.btn-ghost:hover:not(:disabled){color:var(--text);background:#ffffff1a}.spinner{border:2px solid #ffffff4d;border-top-color:#fff;border-radius:50%;flex-shrink:0;width:14px;height:14px;animation:.7s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.error-box{color:#ff8a80;background:#ff52521f;border:1px solid #ff525259;border-radius:8px;margin:0 14px 12px;padding:10px 14px;font-size:13px}.result-empty{color:var(--text-muted);text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:14px;padding:60px 20px;font-size:14px;line-height:1.8;display:flex}.result-empty-icon{opacity:.5;font-size:44px}.big-spinner{border:3px solid #6c63ff40;border-top-color:var(--primary);border-radius:50%;width:40px;height:40px;animation:.8s linear infinite spin}.result-content{flex-direction:column;display:flex}.result-count{border-bottom:1px solid var(--border);background:linear-gradient(135deg,#00e67612,#6c63ff0d);align-items:baseline;gap:6px;padding:16px 18px 14px;display:flex}.count-label{color:var(--text-muted);font-size:13px}.count-number{background:linear-gradient(135deg,#00e676,#69f0ae);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:44px;font-weight:800;line-height:1}.count-unit{color:var(--text-muted);font-size:16px}.result-image{width:100%;height:auto;display:block}.result-hint{color:var(--text-muted);text-align:center;padding:8px 18px 12px;font-size:12px}.footer{text-align:center;color:var(--text-muted);border-top:1px solid var(--border);padding:14px;font-size:12px}@media (width<=767px){.header{flex-wrap:wrap;gap:4px;padding:12px 14px}.header-sub{width:100%}.main{padding:12px}.workspace{grid-template-columns:1fr}.controls{flex-wrap:wrap}.btn{min-width:0}.result-empty{padding:36px 20px}.count-number{font-size:36px}}