body { font-family:sans-serif; background:#333; color:#fff; padding:50px; }
#drop-area { border:2px dashed #FF6600; padding:30px; text-align:center; margin-bottom:20px; }
#drop-area.highlight { background:#FF660022; }
button { background:#FF6600; border:none; padding:10px 20px; color:#fff; cursor:pointer; margin-right:5px; }
progress { width:100%; height:25px; border-radius:5px; }
input { padding:10px; margin:5px 0; width:100%; box-sizing:border-box; }