body {
    margin: 0;
    padding: 0;
    background-image: url(image.jpg);
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-position: center;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}
#box {
    width: 75%;
    max-width: 600px;
    background-color: #f2f2f2;
    padding: 30px;
    border-radius: 20px;
    border: 1px solid #999;
    font-family: sans-serif;
    text-align: center;
    box-shadow: 0 0 20px #999;
}
h1 {
    margin-top: 40px;
    margin-bottom: 30px;
    letter-spacing: 4px;
}
.champ {
    border: 1px solid #999;
    margin: 10px 0;
    padding: 15px;
    border-radius: 7px;
}
.champ label {
    display: block;
    text-align: left;
    color: #333;
    text-transform: uppercase;
    font-size: 12px;
    font-weight: bold;
}
.champ input {
    border: none;
    background: none;
    width: 100%;
    outline: none;
    margin-top: 5px;
    font-size: 16px;
}
input[type="submit"] {
    padding: 15px;
    width: 100%;
    cursor: pointer;
    background-color:orangered;
    border: none;
    outline: none;
    color: white;
    font-size: 19px;
    letter-spacing: 2px;
    border-radius: 7px;
    transition: 0.5s;
}
input[type="submit"]:hover {
    background-color: orange;
    color: black;
    transition: 0.5s;
}