body {
margin:0;
font-family:system-ui,sans-serif;
background:#111827;
color:white;
}

.layout {
display:flex;
height:100vh;
}


.sidebar {
width:240px;
background:#1f2937;
padding:20px;
}


.sidebar button {

display:block;
width:100%;
padding:12px;
margin:6px 0;

background:#374151;
color:white;

border:0;
border-radius:8px;

text-align:left;
cursor:pointer;

}


.sidebar button:hover {
background:#4b5563;
}


.content {

flex:1;
padding:30px;

}


header {

display:flex;
justify-content:space-between;
align-items:center;

}


#panel {

margin-top:30px;

background:#1f2937;
padding:30px;
border-radius:16px;

min-height:300px;

}