.top_nav nav li{
    list-style: none;
}
.top_nav nav li a{
    text-transform: none;
    text-decoration: none;
    white-space: nowrap;
}
.main_nav.fixed {
    position: fixed;
    z-index: 99999;
    width: 100%;
    top: 0px;
    left: 0px;
    border-bottom: solid 1px #ccc;
    box-shadow: 0px 0px 4px #333;
}
.top_nav .btn_open{
    cursor: pointer;
}
.top_nav .btn_close{
    position: fixed;
    cursor: pointer;
    top: 10px;
    right: 10px;
    z-index: 99999;
    display: none;
}
body.mobile_nav_active .top_nav .btn_close{
    display: block;
}
body.mobile_nav_active{
    overflow: hidden;
}
body.mobile_nav_active:before{
    content: "";
    backdrop-filter: blur(10px) brightness(0.5);
    -webkit-backdrop-filter: blur(10px) brightness(0.5);
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0px;
    left: 0px;
    z-index: 9998;
    animation: opacity .5s;
}
body.mobile_nav_active .top_nav nav{
    left: 0px;
}
body.mobile_nav_active .main_nav.fixed{
    position: relative !important;
}
@media only screen and (min-width: 576px) {
    .top_nav .mobile {
        display: none !important;
    }
}

@media only screen and (max-width: 576px) {
  .top_nav .pc {
    display: none !important;
  }
  .top_nav nav{
    position: fixed;
    z-index: 9999;
    height: 100%;
    width: 50%;
    max-width: 400px;
    min-width: 200px;
    background: #FFF;
    border-right: solid 1px #ccc;
    box-shadow: 0px 0px 5px #333;
    top: 0px;
    left: -200%;
    flex-direction: column;
    transition: all ease-in-out .2s;
  }
  .top_nav nav > ul{
    flex-direction: column;
  }
  .top_nav nav > ul li{
    width: 100%;
    border-top: solid 1px #ccc;
  }
  .top_nav nav > ul li:first-child {
    border: none;
  }
}

@keyframes opacity{
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}