.menu-btn {
    display: none;
}
.main-menu {
    background-color: #3F3F3F;
    padding: 50px 0;
}
.protocol-list {
    list-style-type: none;
    display: flex;
    flex-direction: row;
    justify-content: flex-end;
}
.protocol-list-item {
    padding: 0 0 0 30px;
}
.protocol-link {
    text-decoration: none;
    color: #fff;
    font-size: 18px;
}
.protocol-link:hover {
    color: #7FDBFF;
}
.main-menu .container {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
}
.header-logo {
    background-color: #fff;
    height: 150px;
    width: 150px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-radius: 50%;
}
.header-logo img {
    width: 120px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}