body, html {
    height: 100%;
    margin: 0;
    font-family: Arial;
    background: #333;
}

.tablink {
    background-color: #555;
    color: white;
    float: left;
    border: none;
    outline: none;
    cursor: pointer;
    padding: 14px 16px;
    font-size: 17px;
    width: 25%;
}

.tablink:hover {
    background-color: #777;
}

.tabcontent {
    color: white;
    display: none;
    padding: 80px 15px;
}

.sbmt-input {
    padding: 1px 15px;
    border: 2px solid #666;
    background: #333;
    color: white;
}

.txt-input {
    width: 250px;
    border: 2px solid #666;
    background: #333;
    color: white;
}

.dmn-txtarea {
    resize: none;
    float: left;
    width: 50%;
    border: 2px solid #666;
    background: #333;
    color: white;
    height: 250px;
}