.tab-container{margin:0 auto;max-width:800px;width:100%}.tab-header{border-bottom:1px solid #ccc;display:flex}.tab-btn{background-color:#f2f2f2;border:none;cursor:pointer;outline:none;padding:10px 20px;transition:background-color .3s ease}.tab-btn.active{background-color:#fff;border-bottom:2px solid #e53935}.tab-content{padding:20px}.tab-pane{display:none}.tab-pane.active{display:block}