header {
    position: absolute;
    top: 0;
    padding: 50px var(--sidebar-width) 20px;
    z-index: 100;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
}

header .content {
    display: flex;
    justify-content: space-between;
    width: 100%;
    align-items: center;
}
header .content .logo .mobile,
header .content .toggle-menu {
    display: none;
}

header .content .center-block {
    display: flex;
    gap: 70px;
}

header .content .list {
    display: flex;
    gap: 50px;
}

header .content .list a {
    text-decoration: none;
    color: var(--primary-text-color);
    font-size: 14px;
    position: relative;
    transition: color var(--transition-duration) var(--transition-easing);
}

header .content .list a.active {
    pointer-events: none;
}

header .content .list a::before {
    content: "";
    position: absolute;
    height: 1px;
    width: 53%;
    background-color: var(--secondary-text-color);
    left: 50%;
    transform: translateX(-50%);
    bottom: -10px;
    opacity: 0;
    transition: all 0.3s ease-in;
    cursor: default;
}

header .content .list a.active::before,
header .content .list a:hover::before {
    opacity: 1;
}

header .content .list a:hover {
    color: var(--secondary-text-color);
}

header .contact-us-link {
    color: var(--primary-text-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--secondary-text-color);
    font-size: 14px;
}

/* lang-block */

.lang-block-wrapper {
    position: relative;
}

.lang-block {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.lang-list {
    position: absolute;
    text-align: end;
    background: var(--card-bg-color);
    top: 100%;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    border-radius: 16px;
    width: max-content;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.lang-block-wrapper .lang-block svg {
    transition: all 0.3s;
}

.lang-block-wrapper .lang-block img {
    width: 24px;
    height: auto;
    object-position: center;
}
.lang-block-wrapper:hover .lang-list {
    opacity: 1;
    pointer-events: all;
}

.lang-block-wrapper:focus-visible .lang-list {
    opacity: 1;
    pointer-events: all;
}

.lang-list a {
    color: var(--muted-text-color);
    text-decoration: none;
    text-align: end;
    transition: color var(--transition-duration) var(--transition-easing);
}

.lang-list a:hover {
    color: var(--primary-text-color);
}

.lang-block button {
    display: flex;
    background: none;
    cursor: pointer;
    border: 0;
    color: var(--primary-text-color);
    padding: 0;
    gap: 10px;
    align-items: center;
    font-size: 14px;
}

.header-menu {
    height: calc(100vh);
    position: fixed;
    width: 100vw;
    top: 0;
    padding: 135px 0 37px;
    left: 100vw;
    background: var(--body-bg);
    transition: left 0.3s ease-in-out;
    z-index: 20;
    display: flex;
    justify-content: space-between;
    flex-direction: column;
    overflow: auto;
}

.header-menu .links {
    display: flex;
    flex-direction: column;
    text-align: right;
    gap: 22px;
    padding: 0 21px;
}

.header-menu .links a {
    color: var(--primary-text-color);
    font-family: STIX Two Math;
    font-size: 32px;
    text-decoration: none;
}

.header-menu .links a:last-child {
    color: var(--secondary-text-color);
    margin-top: 5px;
}

.header-menu .footer {
    padding-top: 30px;
    border-top: 1px solid var(--line-color);
}

.header-menu .footer .policy {
    font-size: 18px;
    font-weight: 300;
    display: flex;
    padding: 0 21px;
    flex-direction: column;
    gap: 26px;
    text-align: end;
    padding-bottom: 30px;
}

.header-menu .footer .policy > div {
    display: flex;
    align-items: center;
    gap: 12px;
    justify-content: end;
}

.header-menu .footer .policy a {
    text-decoration: none;
    color: var(--primary-text-color);
}

.header-menu .footer .socials-list {
    padding-top: 32px;
    border-top: 1px solid var(--line-color);
    display: flex;
    justify-content: center;
    gap: 22px;
}

@media (max-width: 1500px) {
    header .content .center-block {
        gap: 20px;
    }

    header .content .list {
        gap: 20px;
    }
}

@media (max-width: 1400px) {
    header .content .center-block {
        gap: 30px;
    }

    header .content .list {
        gap: 15px;
    }

    .sidebar {
        display: none;
    }
}

@media (min-width: 1024px) {
    .lang-block {
        margin-top: -3px;
    }
}

@media (max-width: 1024px) {
    header {
        padding: 40px 0 28px;
        background-color: var(--body-bg);
        position: fixed;
        top: 0;
    }

    .show-menu header {
        border-bottom: 1px solid var(--line-color);
        padding-bottom: 27px;
    }
    header .content .logo .mobile,
    header .content .toggle-menu {
        display: flex;
    }

    header .content .toggle-menu .close-menu:not(.show-menu header .content .toggle-menu .close-menu),
    .show-menu header .content .toggle-menu .open-menu,
    header .content .logo .desktop {
        display: none;
    }

    header .content .logo svg,
    header .content .center-block,
    header .content .contact-us-link {
        display: none;
    }

    .show-menu .header-menu {
        left: 0;
    }
}