header {
    background: rgb(16 153 146 / 79%);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    height: var(--header-height);
    top: 0;
    width: 100vw;
    backdrop-filter: blur(5px);
    left: 0;
    z-index: 10000;
}

header .container {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--main-padding);
}

nav {
    display: flex;
    gap: 64px;
}

.social_links {
    display: flex;
    gap: 25px;
}
/*
.social_links a:nth-child(1){
  padding: 5px 0 0;
}
*/

.logo img{
    width: 70px;
}

.main-nav a{
  font-size: 21px;
} 

header nav a:hover {
    color: var(--secondary-color);
    transition: 0.3s;
}

header nav a {
    position: relative;
    transition: 0.3s;
}

header nav a:after {
    content: '';
    position: absolute;
    display: block;
    width: 0;
    margin-top: 4px;
    height: 2px;
    background: var(--secondary-color);
    transition: 0.3s;
}

header nav a:hover:after {
    width: 100%;
}

/* Мобильное меню */
.mobile_header {
    display: none;
}

.burger {
    display: none;
    cursor: pointer;
}

/* Медиа-запросы для мобильной версии */
@media screen and (max-width: 1620px) {
    .main-nav a{
      font-size: 16px;
    }

    .contacts .container h2{
      font-size: 65px;
    }
    
    .menu-link {
      margin-top: 54%;
    }
}

@media screen and (max-width: 1410px) {
    nav {
        gap: 32px;
    }
    
}

@media screen and (max-width: 1000px) {
    .burger {
        display: block;
        z-index: 10001;
    }
    
    .social_links {
        display: none;
    }
    
    nav.main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: rgb(16 153 146 / 95%);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 20px;
        transition: right 0.3s ease-in-out;
        z-index: 9999;
        gap: 20px;
    }
    
    nav.main-nav.active {
        right: 0;
    }
    
    .mobile_header {
        display: flex;
        top: 0;
        left: 0;
        right: 0;
        background: rgb(16 153 146);
        border-bottom: 1px solid rgba(255,255,255);
    }
    
    .mobile_logo {
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;
    }
    
    .mobile_logo .logo img {
        width: 100px;
    }
    
    .close {
        cursor: pointer;
        width: 24px;
        height: 24px;
    }
    
    nav.main-nav a {
        padding: 4px 0;
        width: 100%;
        text-transform: uppercase;
        font-size: 18px;
    }
    
    nav.main-nav a:after {
        display: none;
    }
}