#main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.94);
    border-bottom: 1px solid rgba(20, 36, 45, 0.08);
    transition: background-color var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#main-header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 14px 28px rgba(20, 36, 45, 0.08);
}

.header-flex {
    min-height: clamp(72px, 9vh, 84px);
    display: flex;
    align-items: center;
    gap: 24px;
}

.header-menu-panel {
    display: flex;
    align-items: center;
    width: 100%;
}

.logo {
    flex-shrink: 0;
}

#main-logo {
    display: block;
    height: clamp(38px, 5vw, 48px);
    width: auto;
    padding: 6px;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid rgba(20, 36, 45, 0.08);
}

.action-bar {
    margin-left: 32px;
}

.action-bar ul {
    display: flex;
    align-items: center;
    gap: clamp(18px, 3vw, 32px);
    list-style: none;
}

.action-bar a {
    position: relative;
    text-decoration: none;
    font-size: clamp(0.68rem, 1.4vw, 0.78rem);
    font-weight: 700;
    letter-spacing: clamp(0.08em, 0.22vw, 0.16em);
    text-transform: uppercase;
    color: rgba(20, 36, 45, 0.82);
    transition: color var(--transition);
}

.action-bar a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -10px;
    width: 100%;
    height: 1px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform var(--transition);
}

.action-bar a:hover,
.action-bar a:focus-visible,
.nav-contact-link {
    color: var(--ink);
}

.action-bar a:hover::after,
.action-bar a:focus-visible::after,
.nav-contact-link::after {
    transform: scaleX(1);
}

.lang-switcher {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 6px;
}

.lang-switcher button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid transparent;
    background: transparent;
    cursor: pointer;
    padding: 8px 10px;
    color: var(--ink);
    transition: border-color var(--transition), background-color var(--transition);
}

.lang-switcher button:hover,
.lang-switcher button.active {
    border-color: rgba(58, 99, 116, 0.22);
    background: rgba(58, 99, 116, 0.06);
}

.lang-switcher button span {
    font-size: clamp(0.66rem, 1.4vw, 0.76rem);
    font-weight: 700;
    letter-spacing: 0.08em;
}

.lang-switcher .sep {
    color: rgba(20, 36, 45, 0.22);
}

.flag-icon {
    width: 24px;
    height: 16px;
    object-fit: cover;
}

.menu-toggle {
    display: none;
    margin-left: auto;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(20, 36, 45, 0.12);
    background: rgba(255, 255, 255, 0.94);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
}

.menu-toggle span {
    width: 18px;
    height: 2px;
    background: var(--ink);
    transition: transform var(--transition), opacity var(--transition);
}

#main-header.menu-open .menu-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

#main-header.menu-open .menu-toggle span:nth-child(2) {
    opacity: 0;
}

#main-header.menu-open .menu-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 1080px) {
    .header-flex {
        min-height: clamp(68px, 8vh, 78px);
        flex-wrap: wrap;
        position: relative;
        padding: 10px 0;
    }

    .menu-toggle {
        display: inline-flex;
    }

    .header-menu-panel {
        position: absolute;
        top: calc(100% - 2px);
        left: 0;
        right: 0;
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 14px;
        padding: 14px;
        border: 1px solid rgba(20, 36, 45, 0.1);
        background: rgba(255, 255, 255, 0.98);
        box-shadow: 0 18px 34px rgba(20, 36, 45, 0.1);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translateY(-8px);
        transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
    }

    #main-header.menu-open .header-menu-panel {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateY(0);
    }

    .action-bar {
        margin-left: 0;
        width: 100%;
    }

    .action-bar ul {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    .action-bar li + li {
        border-top: 1px solid rgba(20, 36, 45, 0.08);
    }

    .action-bar a {
        display: block;
        padding: 12px 2px;
        font-size: 0.88rem;
        line-height: 1.35;
        overflow-wrap: anywhere;
    }

    .action-bar a::after {
        bottom: 4px;
    }

    .lang-switcher {
        margin-left: 0;
        flex-wrap: wrap;
    }
}

@media (max-width: 640px) {
    #main-logo {
        height: 36px;
    }

    .header-menu-panel {
        padding: 12px;
    }

    .lang-switcher {
        gap: 4px;
    }

    .lang-switcher button {
        padding: 6px 8px;
    }

    .lang-switcher button span {
        font-size: 0.68rem;
    }

    .action-bar a::after {
        display: none;
    }
}

@media (max-height: 760px) and (max-width: 1080px) {
    .header-menu-panel {
        max-height: calc(100dvh - 86px);
        overflow-y: auto;
    }
}