body{
margin:0;
font-family:Arial;
background:#0d0d0d;
color:white;
overflow:hidden;
}

/* TOP */
.top{
background:#111;
padding:15px;
text-align:center;
font-weight:bold;
}

/* CHAT AREA */
#chat{
height: calc(100vh - 120px);
overflow-y:auto;
padding:10px;
padding-bottom:80px;
}

/* INPUT FIXED BOTTOM CENTER */
.input{
position:fixed;
bottom:15px;
left:50%;
transform:translateX(-50%);
width:95%;
max-width:600px;
display:flex;
gap:10px;
background:#111;
padding:10px;
border-radius:15px;
box-shadow:0 0 10px rgba(0,0,0,0.5);
}

textarea{
flex:1;
padding:12px;
border:none;
outline:none;
background:#222;
color:white;
border-radius:10px;
resize:none;
height:45px;
}

button{
width:60px;
border:none;
background:#00c3ff;
color:white;
font-size:18px;
border-radius:10px;
}