body {
    width: 100%;
    height: 100px;
    background-color: black;
    justify-content: center;
    align-items: center;
}
#header{
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 50px;
    background-color: rgb(0, 0, 0);
    z-index: 999;
    margin-top: -8px;
    position: relative;
    top: 0;

    left: -7px;
}
#header img{
    height: 30px;
}
#navbar{
    display: flex;
    align-items: center;
    justify-content: space-between;
}
#navbar li{
    list-style: none;
    padding: 0 15px;
    position: relative;
}
#navbar li a{
    text-decoration: none;
    font-size: 21px;
    font-weight: 600;
    color: rgb(255, 255, 255);
    padding: 6px 10px;
}
.main-content .text-part {
    color: white;
    padding-left: 20%;
    padding-top: 4%;
    padding-bottom: 2%;
    border-radius: 5px;
    width: 250px;
    margin-top: 40px;
    font-size: 20px ;
}
.main-content .btn {
    color: rgb(0, 0, 0);
    border:4px solid #000000;
    margin: auto;
    font-size: 25px;
    border-radius: 10px;
    padding: 3px 50px;
    height: 66px;
    width: -1px;
    cursor: pointer;
}
.centr-btn{
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 100px;
    justify-content: center;
    margin-left: 500px;
    margin-top: -170px;
}
.centr-btn a{
    text-decoration: none;
    color: rgb(0, 0, 0);
}
.centr-btn :hover{
    background-color: rgb(0, 0, 0);
    color: rgb(255, 255, 255);
    box-shadow: 40px white;
}