body{
margin:0;
font-family:Arial;
background:#0f172a;
color:white;
display:flex;
}

header{
position:fixed;
top:0;
left:0;
right:0;
background:#1e293b;
padding:10px;
display:flex;
justify-content:space-between;
align-items:center;
z-index:1000;
}

aside{
width:250px;
background:#111827;
margin-top:60px;
overflow:auto;
height:100vh;
}

aside button{
width:100%;
padding:10px;
background:none;
border:none;
color:white;
text-align:left;
}

aside button:hover{
background:#1f2937;
}

main{
flex:1;
margin-top:60px;
padding:20px;
overflow:auto;
}

.card{
background:#1e293b;
padding:15px;
margin:15px 0;
border-radius:12px;
animation:fade 0.5s ease-in-out;
}

@keyframes fade{
from{opacity:0;transform:translateY(10px);}
to{opacity:1;transform:translateY(0);}
}

code{
background:black;
display:block;
padding:10px;
border-radius:8px;
color:#22c55e;
overflow:auto;
}