.header-panel{position:relative}
.nav-open .main-nav{display:flex;flex-wrap:wrap;position:absolute;top:100%;left:8px;right:8px;height:auto;padding:16px;background:#fff;border-radius:0 0 18px 18px;box-shadow:0 8px 20px rgba(23,55,97,.16);z-index:50}
.nav-open .nav-item{flex:1 1 92px}