.header {
    position: sticky;
    top: 0;
    z-index: 50;

    background: rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);

    border-bottom: 1px solid var(--color-line);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;

    max-width: var(--content-width);

    margin: 0 auto;
    padding: 14px var(--page-padding);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 11px;

    color: var(--color-ink);
}

.header-logo:hover {
    color: var(--color-ink);
}

.header-logo-image {
    width: 40px;
    height: 40px;

    border-radius: 11px;

    box-shadow: 0 3px 10px rgba(19, 181, 213, 0.28);
}

.header-logo-text {
    font-size: 22px;
    font-weight: var(--font-weight-black);
    letter-spacing: -0.02em;

    color: var(--color-ink);
}

.header-navigation {
    display: flex;
    align-items: center;
    gap: 30px;
}

.header-navigation-link {
    color: var(--color-ink-secondary);

    font-size: 15px;
    font-weight: var(--font-weight-bold);

    transition: color var(--transition-color);
}

.header-navigation-link:hover {
    color: var(--color-ink);
}

.header-lang-switch {
    display: flex;
    align-items: center;
    gap: 2px;

    padding: 3px;

    background: var(--color-soft);
    border-radius: var(--radius-pill);
}

.header-lang-option {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    padding: 5px;

    border-radius: var(--radius-small);

    opacity: 0.6;
    transition: opacity var(--transition-color), background var(--transition-color);
}

.header-lang-flag {
    display: block;

    width: 22px;
    height: 16.5px;

    border-radius: 3px;
    box-shadow: 0 0 0 1px rgba(12, 34, 38, 0.14);

    object-fit: cover;
}

.header-lang-option:hover {
    opacity: 1;
}

.header-lang-option.is-active {
    background: var(--color-white);

    opacity: 1;
    box-shadow: 0 1px 4px rgba(12, 34, 38, 0.12);
}

.header-cta {
    display: inline-flex;
    align-items: center;
    gap: 7px;

    padding: 11px 20px;

    background: var(--color-coral);
    color: var(--color-white);

    border-radius: 11px;

    font-size: 15px;
    font-weight: var(--font-weight-bold);

    box-shadow: 0 7px 18px rgba(255, 106, 61, 0.28);

    transition:
        background var(--transition-color),
        transform var(--transition-movement);
}

.header-cta:hover {
    background: var(--color-coral-dark);
    color: var(--color-white);

    transform: translateY(-1px);
}

.header-menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;

    width: 40px;
    height: 40px;
    padding: 0;

    background: none;
    border: 0;
    border-radius: var(--radius-small);

    cursor: pointer;
}

.header-menu-toggle:hover {
    background: var(--color-soft);
}

.header-menu-icon,
.header-menu-icon::before,
.header-menu-icon::after {
    display: block;

    width: 22px;
    height: 2px;

    background: var(--color-ink);
    border-radius: 2px;

    transition: transform 0.2s ease, opacity 0.2s ease, top 0.2s ease;
}

.header-menu-icon {
    position: relative;
}

.header-menu-icon::before,
.header-menu-icon::after {
    content: '';
    position: absolute;
    left: 0;
}

.header-menu-icon::before { top: -7px; }
.header-menu-icon::after { top: 7px; }

.header-menu-toggle[aria-expanded="true"] .header-menu-icon {
    background: transparent;
}

.header-menu-toggle[aria-expanded="true"] .header-menu-icon::before {
    top: 0;
    transform: rotate(45deg);
}

.header-menu-toggle[aria-expanded="true"] .header-menu-icon::after {
    top: 0;
    transform: rotate(-45deg);
}

body.nav-open {
    overflow: hidden;
}

@media (max-width: 860px) {
    .header-menu-toggle {
        display: inline-flex;
    }

    .header-navigation {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        z-index: 1;

        flex-direction: column;
        align-items: stretch;
        gap: 2px;

        max-height: 0;
        overflow: hidden;

        padding: 0 var(--page-padding);

        background: var(--color-white);
        border-bottom: 1px solid var(--color-line);
        box-shadow: 0 18px 34px rgba(12, 34, 38, 0.10);

        transition: max-height 0.25s ease, padding 0.25s ease;
    }

    .header-navigation.is-open {
        max-height: 420px;
        padding: 12px var(--page-padding) 22px;
    }

    .header-navigation-link {
        padding: 13px 2px;
        border-bottom: 1px solid var(--color-line);
    }

    .header-cta {
        justify-content: center;
        margin-top: 10px;
    }

    .header-lang-switch {
        align-self: center;
        margin-top: 12px;
    }
}

@media (max-width: 480px) {
    .header-container {
        padding-top: 12px;
        padding-bottom: 12px;
    }

    .header-logo-text {
        font-size: 19px;
    }

    .header-logo-image {
        width: 34px;
        height: 34px;
    }
}