artkep

.container {
    width: 1920px;
    height: 138px;
    margin: 0 auto;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.18);
  z-index: 2;
    
}
.nav-menu {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: center;
}
.nav-menu__item {
    display: flex;
    margin: 45px 50px;
}
.nav-menu__item a {
    font-family: 'Raleway';
    font-style: normal;
    font-weight: 500;
    font-size: 32px;
    line-height: 38px;
    text-decoration: none;
    color: #000;
} 
.nav-menu__item_center {
    display: block;
}
.logo {
    text-align: center;
  width:180px;
  hidth:180px;
}
.logo__link {
    display: inline-block;
  position:absolute;
  top:60px;
  z-index: 1;
}
.logo__image {
    display: block;
    width: 140px;
    height: 140px;
}

.nav-menu__item.logo::before {
    content:" ";
    width: 10em;
    height: 5em;
    border-radius: 0 0 50% 50% / 0 0 100% 100%;
    position:absolute;
    top:138px;
    margin-left:-10px;
    background: #fff;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.18);
    z-index: -1;
}