.menu_bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    margin: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
}

.menu_bar_icon {
    position: absolute;
    left: 5px;
    top: 0;
    bottom: 0;
    height: 45px;
    width: 45px;
    margin: auto;
    background-image: url("../images/favicon.jpg");
    background-size: contain;
    background-position: center;
    border-radius: 8px;
}

.menu_btn {
    position: absolute;
    right: 20px;
    color: white;
    font-size: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
}

.menu_btn:hover{
    color: orange;
}

.menu_panel {
    position: absolute;
    left: 0;
    right: 0;
    margin: auto;
    top: 50px;
    height: 0;
    width: 85%;
    border-radius: 0 0 25px 25px;
    border: 2px solid #1e05b6;
    z-index: 1000;
    max-width: 545px;
    background: rgba(0,0,0,0.8);
    overflow: hidden;
    /*transition: height .5s ease;*/
    box-shadow: 0px 0px 20px dodgerblue;
}

.menu_panel.open {
    /* OPEN to viewport height minus 100px, but via --vh (mobile safe) */
    height: calc(100% - 100px);
}

.menu_sub_panel {
    position: absolute;
    top: 35px;
    left: 0;
    right: 0;
    margin: auto;
    height: 550px;
    width: 85%;
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: space-evenly;
    align-items: center;
}

.menu_sub_btn {
    border: 2px solid blue;
    height: 50px;
    border-radius: 15px;
    color: #71b9ff;
    box-shadow: 0px 0px 30px dodgerblue;
    cursor: pointer;
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    align-items: center;
    font-family: arial;
    font-size: 1.5rem;
    text-align: center;
    width: 85%;
    height: 70px;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -o-user-select: none;
    user-select: none;
}

.menu_sub_btn:hover{
    filter: brightness(150%);
}