html,body{
    margin:0;
    padding:0;
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    width:100%;
    height: 100%;
    background-color: #3593FF;
}

#bg-video{
    position: fixed;
    right: 0;
    bottom: 0;
    min-width: 100%;
    min-height: 100%;
}

#main_header{
    height:54px;
    color: white;
    padding: 0 15px;
    position: absolute;
    top: 15px;
    left: 0px;
    z-index: 10;
    user-select: none;
}

.header_title{
    vertical-align: middle;
    font-size: 20px;
    margin-left: 5px;
    font-weight: 400;
}

#main_header .logo{
    vertical-align: middle;
}

#login-form{
    width:300px;
    min-height: 200px;
    background-color: rgba(255,255,255,0.5);
    position: absolute;
    top:50%;
    left:50%;
    margin: -100px 0 0 -150px;
    border-radius: 10px;
}

#username,
#password{
    width: 86%;
    border:none;
    outline: none;
    font-size: 20px;
    padding:0 3%;
    margin:10px auto;
    display: block;
    border-radius: 6px;
    line-height: 50px;
}

#submit{
    padding: 0;
    background-color: #3593FF;
    color: white;
    border:none;
    cursor: pointer;
    line-height: 50px;
    display: block;
    border-radius: 6px;
    font-size: 20px;
    font-weight: 600;
    position:absolute;
    left:4%;
    right: 4%;
    bottom: 6%;
}

#error-msg{
    display: none;
    margin-bottom: 75px;
    color: #d53030;
    text-align: center;
}


.preloader {
    display: block;
    width: 80px;
    height: 80px;
    position: absolute;
    top:50%;
    left:50%;
    margin: -45px 0 0 -50px;
    display: none;
}
.preloader:after {
    content: " ";
    display: block;
    width: 64px;
    height: 64px;
    margin: 8px;
    border-radius: 50%;
    border: 6px solid rgb(53 147 255 / 100%);
    border-color: rgb(53 147 255 / 100%) transparent rgb(53 147 255 / 100%) transparent;
    animation: lds-dual-ring 1.2s linear infinite;
}
@keyframes lds-dual-ring {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}