:root {
    /* --caminho: url('../Imagens/Fabrica_EVAC (11).JPG');*/
}

body {
    margin: 0;
    padding: 0;
    font-family: monospace;
    /*background-image: url('../Imagens/Fabrica_EVAC (1).jpg');*/
    /*background-image: var(--caminho);*/
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center center;
    height: 100vh;
    overflow: hidden;
}

.imagem {
    image-orientation:inherit;
    image-resolution:from-image;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center center;
    height: 100vh;
    overflow: hidden;
} 

.center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    border-radius: 10px;
    background: white;
    opacity: 80%;
}

.center h1{
    text-align:center;
    padding:0 0 20px 0;
    border-bottom:1px solid silver;
}

.center form{
    padding: 0 40px;
    box-sizing:border-box;
}

form .txt_field{
    position:relative;
    border-bottom: 2px solid #adadad;
    margin:30px 0;
}

.txt_field input{
    width:100%;
    padding:0 5px;
    height:40px;
    font-size:16px;
    border:none;
    background:none;
    outline:none;
}

.txt_field label{
    position:absolute;
    top:50%;
    left:25px;
    color:#adadad;
    transform: translate(-50%);
    font-size:16px;
    pointer-events:none;
    transition : .5s;
}

.txt_field span::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 0;
    width: 0%;
    height: 2px;
    background: #2691d9;
    transition: .5s;
}

.txt_field input:focus ~ label,
.txt_field input:valid ~ label {
    top: -5px;
    color: #2691d9;
}

.txt_field input:focus ~ span::before,
.txt_field input:valid ~ span::before {
    width:10%;
}

.pass{
    margin: -5px 0 20px 5px;
    color:#a6a6a6;
    cursor:pointer;
}

.pass:hover {
    text-decoration:underline;
}

input[type="submit"] {
    width: 100%;
    height: 50px;
    border: 1px solid;
    background: #2691d9;
    border-radius: 25px;
    font-size: 18px;
    color: #e9f4fb;
    font-weight: 700;
    cursor: pointer;
    outline: none;
    border-color: aqua;
    border: double;
}

input[type="submit"]:hover {
    border-color:#2691d9;
    transition:.5s;
    border:double;
    border-color:black;
}