html {
 font-size: 14px;
}
body {
 margin: 2rem;
 line-height: 1.4rem;
}
body,
span,
pre,
textarea,
input {
 font-family: 'source-code-pro', monospace;
 font-size: 1rem;
 background-color: #000;
 color: #fff;
}
button {
 border: none;
 font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
 font-weight: 600;
 font-size: .8rem;
 text-transform: uppercase;
 letter-spacing: 1px;
 color: #000;
 background-color: #fff;
 padding: 1rem;
}
#prom-cont {
 display: block;
 position:relative;
}
textarea,
#prom-size {
 min-height: 24px;
 box-sizing: border-box;
 overflow: hidden;
 width: 100%;
}
textarea {
 height: 100%;
 border: 0;
 outline: none;
 position: absolute;
 resize: none;
}
#prom-size {
 visibility: hidden; 
 white-space: pre-wrap;
 word-wrap: break-word;
 overflow-wrap: break-word;
}