body { font-family: Arial, sans-serif; background:#f4f4f4; color:#333; margin:0;}
header{background:#222;color:#fff;padding:10px;text-align:center;}
main{display:flex;gap:20px;padding:20px;}
#new-thread,#board{flex:1;background:#fff;padding:15px;border-radius:5px;}
input,textarea{width:100%;margin:5px 0;}
button{padding:5px 10px;background:#222;color:#fff;border:none;cursor:pointer;}
.thread{border:1px solid #ccc;padding:10px;margin:10px 0;border-radius:5px;background:#fafafa;}
.thread img{max-width:200px;display:block;margin-top:5px;}