body {
    font-family: 'Bitter', serif;
    color: white;
    margin: 0px;
    padding: 0px;
    background: url("images/gym.jpg") no-repeat center center / cover;
}

.header {
    background-color: black;
    height: 45px;
}

.left {
    text-align: center;
    position: absolute;
    line-height: 30px;
    top: 0px;
    left: 10px;
}

.mid {
    text-align: center;
    line-height: 46.5px;
    display: block;
    width: 40%;
    margin: 0px auto;
}

.mid li {
    display: inline-block;
}

.mid li a {
    text-decoration: none;
    color: white;
    padding: 8px;
}

.active,
.mid li a:hover {
    text-decoration: underline;
    background-color: rgb(170, 164, 164);
}

.right {
    text-align: center;
    line-height: 40px;
    position: absolute;
    top: 0px;
    right: 10px;
}

.img {
    width: 40px;
    height: 26px;
    filter: invert(100%);
}

.left h4 {
    line-height: 0px;
    margin: 0;
    padding: 0px;
}
.btn{
    padding: 5px;
    margin: 1px;
    cursor: pointer;

}
.cont1{
    border: 2px solid black;
    display: block;
    width: 33%;
    margin: 100px 145px;
    text-align: center;
    color: black;
    background-color: #a2a2a473;
}
input{
    padding:2px;
    margin:3px;
    width:70%;
}
.selt{
    width: 72%;
}
.Submit{
    width:72%;
    color:white;
    background-color: black;
    cursor: pointer;
    margin-bottom: 15px;
}