html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
}
img {
    border: none !important;
}
body {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: url('.././image/login_back.png') no-repeat ;
    background-size: cover;
    font-family: 'Arial', sans-serif;
}

.logo {
    text-align: center;
    margin: 10% 0;
    transition: transform 0.3s ease;
}

.loading-div{
        text-align: center;
}

textarea{
    width: 90%;
    height: 50%;
    background: transparent;
    border: none;
    padding: 20px;
    font-size: 15px;
    color: #d1cece;
    line-height: 20px;
}

.div_class_buttons{
    text-align: center;
    margin-top: 40px;
    user-select: none;
}

#btnStart {
    width: 60%;
    height: 40px;
    font-size: 15px;
    border-radius: 5px;
    border: none;
    font-weight: 700;
    user-select: none;
    -webkit-user-select: none; /* Safari */
    -moz-user-select: none; /* Firefox */
    -ms-user-select: none; /* IE 10 and IE 11 */
    box-shadow: 1px 1px 10px 2px #493c3c;
}