:root{--primary: #2563eb;--bg: #f8fafc;--surface: #ffffff;--border: #e2e8f0;--text: #0f172a;--sidebar-width: 400px;--header-height: 60px}body{margin:0;font-family:Inter,sans-serif;overflow:hidden;background-color:var(--bg);color:var(--text)}.app-container{height:100vh;display:flex;flex-direction:column}.top-bar{height:var(--header-height);padding:0 20px;background:#fff;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;flex-shrink:0;z-index:20}.main-area{display:flex;height:calc(100vh - var(--header-height));overflow:hidden}.editor-sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width);background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;z-index:10;height:100%}.tabs-nav{display:flex;overflow-x:auto;border-bottom:1px solid var(--border);background:#f8fafc;flex-shrink:0}.tab-btn{padding:15px;background:transparent;border:none;border-bottom:3px solid transparent;cursor:pointer;color:#64748b;font-weight:600;font-size:.85rem;white-space:nowrap}.tab-btn:hover{background:#e2e8f0;color:#334155}.tab-btn.active{border-bottom-color:var(--primary);color:var(--primary);background:#fff}.editor-content{flex:1;overflow-y:auto;padding:20px 20px 80px}.preview-area{flex:1;position:relative;background:#cbd5e1;display:flex;flex-direction:column;overflow:hidden}.form-group{margin-bottom:15px}label{display:block;font-size:.85rem;font-weight:600;margin-bottom:5px;color:#334155}input,textarea,select{width:100%;padding:10px;font-size:.9rem;border:1px solid var(--border);border-radius:6px;box-sizing:border-box;background:#fff}input:disabled,textarea:disabled{background:#f1f5f9;cursor:not-allowed}.btn-primary{width:100%;padding:10px;background:var(--primary);color:#fff;border:none;border-radius:6px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px}.btn-primary:hover{background:#1d4ed8}.list-item{background:#fff;border:1px solid var(--border);padding:12px;border-radius:8px;margin-bottom:10px}.list-item-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.btn-remove{background:#fee2e2;color:#ef4444;border:1px solid #fecaca;padding:4px 8px;border-radius:4px;cursor:pointer;font-size:.75rem}.badge-pro{background:#fbbf24;color:#000;padding:2px 6px;border-radius:4px;font-size:.7rem;font-weight:800;margin-left:8px}.pro-lock{border:1px solid #fbbf24;background:#fffbeb;padding:10px;border-radius:8px;margin-top:10px}.pro-header{display:flex;justify-content:space-between;font-weight:700;color:#92400e;margin-bottom:8px;font-size:.85rem}html,body,#root{width:100%;height:100%;margin:0;padding:0}