*{
margin:0;
padding:0;
box-sizing:border-box;
font-family:Arial;
}

body{
background:#042354;
display:flex;
justify-content:center;
padding:40px;
}

.container{
background:white;
padding:30px;
border-radius:12px;
width:1000px;
max-width:95%;
}

h1{
text-align:center;
margin-bottom:20px;
}

.editor{
display:grid;
grid-template-columns:1fr 1fr;
gap:20px;
}

/* INPUT */

textarea{
width:100%;
height:400px;
padding:15px;
border:1px solid #ddd;
border-radius:8px;
resize:none;
font-size:14px;
}

/* PREVIEW */

#preview{
border:1px solid #ddd;
padding:15px;
border-radius:8px;
background:#f9fafb;
overflow:auto;
}

#preview h1{
font-size:28px;
}

#preview h2{
font-size:22px;
}

#preview ul{
margin-left:20px;
}