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

html,
body {
    width: 100%;
    height: 100%;
    background: #000;
    overflow: hidden;
    font-family: monospace;
}

textarea {
    width: 100%;
    height: 100%;
    border: none;
    outline: none;
    resize: none;
    background: #000;
    color: #fff;
    padding: 20px;
    font-size: 16px;
    line-height: 1.5;
}

textarea::placeholder {
    color: #666;
}