body{
font-family:sans-serif;
max-width:900px;
margin:auto;
padding:20px;
background:#f4f6f8;
}

h1{
margin-bottom:5px;
}

.desc{
font-size:14px;
margin-bottom:10px;
}

textarea{
width:100%;
height:150px;
margin:10px 0;
font-family:monospace;
resize:vertical;
}

#output{
height:180px;
}

.controls{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
gap:10px;
margin-bottom:10px;
}

.group{
background:#fff;
padding:10px;
border-radius:8px;
font-size:14px;
}

.group h3{
margin-top:0;
font-size:14px;
}

label{
display:block;
margin:4px 0;
}

input[type="text"],
select{
margin:3px 0;
width:100%;
}

button{
padding:12px 22px;
border:none;
background:#8dd8af;
color:white;
border-radius:0px;
cursor:pointer;
margin:6px 0;
font-size:15px;
transition:0.1s;
cursor:pointer;
}

button:hover{
filter:brightness(1.1);
}

button:active{
transform:scale(0.96);
opacity:0.8;
}

#preview{
background:white;
padding:10px;
border-radius:8px;
margin-top:10px;
border:1px solid #ddd;
}

#copyMsg{
margin-left:10px;
color:#2a7;
font-size:0.9em;
}