body{display:flex;font-family:Arial;margin:0}
.sidebar{width:260px;background:#111;color:#fff;padding:20px;height:100vh}
.main{flex:1;padding:20px}
.section{margin-bottom:25px}
.tabs button{margin-right:5px;padding:6px 10px;cursor:pointer}
textarea{width:100%;height:110px;margin-top:10px}
button{margin-top:10px;padding:8px 12px}
label{display:block;margin-top:10px}
.note{margin-top:20px;font-size:12px;color:#ccc}