pan style="color: #79C0FF">.css</span></span>
<span class="line"><span style="color: #79C0FF">.app-side</span><span style="color: #C9D1D9"> {</span></span>
<span class="line"><span style="color: #C9D1D9">  </span><span style="color: #79C0FF">width</span><span style="color: #C9D1D9">: </span><span style="color: #79C0FF">300</span><span style="color: #FF7B72">px</span><span style="color: #C9D1D9">;</span></span>
<span class="line"><span style="color: #C9D1D9">}</span></span>
<span class="line"><span style="co