:root{--bg: #f4f6fa;--panel-bg: #ffffff;--border: #dfe4ec;--text: #1f2a3a;--muted: #7a8aa0;--primary: #4f8cff;--primary-dark: #3b78ec;--success: #1faf6b;--danger: #e5484d;--shadow: 0 1px 3px rgba(20, 35, 65, .08), 0 4px 16px rgba(20, 35, 65, .06)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--text);background:var(--bg)}.app{display:flex;flex-direction:column;height:100vh}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;background:var(--panel-bg);border-bottom:1px solid var(--border);box-shadow:var(--shadow);z-index:2}.toolbar-group{display:flex;align-items:center;gap:10px}.brand{font-weight:700;font-size:15px;letter-spacing:.2px;margin-right:6px}.filename{font-size:13px;color:var(--muted);max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.btn{font:inherit;font-size:13px;padding:7px 12px;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--text);cursor:pointer;transition:background .12s,border-color .12s,transform .05s}.btn:hover:not(:disabled){background:#f0f4fa}.btn:active:not(:disabled){transform:translateY(1px)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn.primary:hover:not(:disabled){background:var(--primary-dark)}.btn.success{background:var(--success);border-color:var(--success);color:#fff}.btn.success:hover:not(:disabled){filter:brightness(1.05)}.btn.danger{background:#fff;border-color:var(--danger);color:var(--danger)}.btn.danger:hover:not(:disabled){background:var(--danger);color:#fff}.btn.full{width:100%}.btn.icon{min-width:34px;padding:7px 9px;text-align:center}.btn.icon.active{background:var(--primary);border-color:var(--primary);color:#fff}.workspace{flex:1;display:flex;min-height:0}.canvas-wrap{flex:1;padding:20px;overflow:auto;display:flex;justify-content:center}.editor-iframe{width:100%;max-width:1100px;height:100%;min-height:600px;border:1px solid var(--border);border-radius:10px;background:#fff;box-shadow:var(--shadow)}.panel{width:290px;flex-shrink:0;background:var(--panel-bg);border-left:1px solid var(--border);padding:16px;overflow-y:auto}.panel-title{margin:0 0 14px;font-size:15px}.panel-hint{font-size:13px;color:var(--muted);line-height:1.5}.panel-hint.small{font-size:12px;margin:8px 0 0}.panel-section{padding:14px 0;border-top:1px solid var(--border)}.panel-section:first-of-type{border-top:none;padding-top:0}.section-title{margin:0 0 10px;font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted)}.el-badge{display:flex;align-items:center;gap:8px}.el-label{font-weight:600;font-size:14px}.el-tag{font-size:12px;color:var(--muted);background:#f0f4fa;padding:2px 6px;border-radius:5px}.btn-row{display:flex;gap:6px;flex-wrap:wrap}.field{display:block;margin-top:12px;font-size:13px}.field>span{display:block;margin-bottom:6px;color:var(--muted)}.field input[type=text]{width:100%;font:inherit;font-size:13px;padding:7px 9px;border:1px solid var(--border);border-radius:8px}.size-row{display:flex;align-items:center;gap:10px}.size-row input[type=range]{flex:1}.size-value{font-size:12px;color:var(--muted);min-width:38px;text-align:right}.color-btn{position:relative;font-weight:700;overflow:hidden}.color-btn input[type=color]{position:absolute;top:0;right:0;bottom:0;left:0;opacity:0;cursor:pointer}.add-row{display:flex;gap:6px}.select{flex:1;font:inherit;font-size:13px;padding:7px 9px;border:1px solid var(--border);border-radius:8px;background:#fff}