html {
    height: 100%;
}

input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
textarea:-webkit-autofill,
textarea:-webkit-autofill:hover,
textarea:-webkit-autofill:focus,
select:-webkit-autofill,
select:-webkit-autofill:hover,
select:-webkit-autofill:focus {
    /* border: 1px solid green;*/
    -webkit-text-fill-color: white;
    -webkit-box-shadow: 0 0 0px 1000px #000 inset;
    /* transition: background-color 5000s ease-in-out 0s;
    background: #333333;*/
}

body {
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    background: linear-gradient(#141e30, #243b55);
}

.login-box {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 400px;
    padding: 40px;
    transform: translate(-50%, -50%);
    background: rgba(0,0,0,.5);
    box-sizing: border-box;
    box-shadow: 0 15px 25px rgba(0,0,0,.6);
    border-radius: 10px;
}

    .login-box h2 {
        margin: 0 0 30px;
        padding: 0;
        color: #fff;
        text-align: center;
    }

    .login-box .user-box {
        position: relative;
    }

        .login-box .user-box input {
            width: 100%;
            padding: 10px 0;
            font-size: 16px;
            color: #fff;
            margin-bottom: 30px;
            border: none;
            border-bottom: 1px solid #fff;
            outline: none;
            background: transparent;
        }

        .login-box .user-box label {
            position: absolute;
            top: -30px;
            left: 0;
            padding: 10px 0;
            font-size: 16px;
            color: #fff;
            pointer-events: none;
            transition: .5s;
        }

        .login-box .user-box input:focus ~ label,
        .login-box .user-box input:valid ~ label {
            top: -30px;
            left: 0;
            color: #03e9f4;
            font-size: 12px;
        }

    .login-box form b {
        position: relative;
        display: inline-block;
        padding: 10px 20px;
        color: #03e9f4;
        font-size: 16px;
        text-decoration: none;
        text-transform: uppercase;
        overflow: hidden;
        transition: .5s;
        margin-top: 40px;
        letter-spacing: 4px
    }

    .login-box b:hover {
        background: #03e9f4;
        color: #fff;
        border-radius: 5px;
        box-shadow: 0 0 5px #03e9f4, 0 0 25px #03e9f4, 0 0 50px #03e9f4, 0 0 100px #03e9f4;
    }

    .login-box b span {
        position: absolute;
        display: block;
    }


@keyframes btn-anim1 {
    0% {
        left: -100%;
    }

    50%,100% {
        left: 100%;
    }
}


@keyframes btn-anim2 {
    0% {
        top: -100%;
    }

    50%,100% {
        top: 100%;
    }
}


@keyframes btn-anim3 {
    0% {
        right: -100%;
    }

    50%,100% {
        right: 100%;
    }
}


@keyframes btn-anim4 {
    0% {
        bottom: -100%;
    }

    50%,100% {
        bottom: 100%;
    }
}


/*.OptOut {
    position: relative;
    display: inline-block;
    border-bottom: 1px dotted black;*/ /* If you want dots under the hoverable text */
/*}


.OptOut .OptOuttext {
        visibility: hidden;
        width: 120px;
        background-color: black;
        color: #fff;
        text-align: center;
        padding: 5px 0;
        border-radius: 6px;*/
        /* Position the tooltip text - see examples below! */
        /*position: absolute;
        z-index: 1;
    }

    .OptOut:hover .OptOuttext {
        visibility: visible;
    }*/