.site-header {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 2000;
    width: 100%;
    height: var(--header-height);
    display: flex;
    align-items: center;
    gap: clamp(24px, 2.5vw, 48px);
    padding: 0 clamp(24px, 2.7vw, 52px);
    color: #fff;
    background: var(--navy);
    box-shadow: 0 3px 18px rgb(32 31 84 / 0.14);
}

.brand {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    text-decoration: none;
}

.brand__logo {
    width: 322px;
    height: 66px;
    object-fit: contain;
}

.primary-nav {
    min-width: 0;
    margin-left: auto;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: clamp(16px, 1.55vw, 30px);
}

.primary-nav a {
    color: #e8e8e8;
    font-family: var(--font-main);
    font-size: 22px;
    font-style: normal;
    font-weight: 400;
    line-height: 1;
    letter-spacing: 0;
    text-decoration: none;
    white-space: nowrap;
    transition: color 180ms var(--motion-ease);
}

.primary-nav a:hover,
.primary-nav a:focus-visible,
.primary-nav a.is-active {
    color: #29d092;
}

.nav-toggle {
    display: none;
}

.page-progress {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: 3px;
    overflow: hidden;
    background: rgb(255 255 255 / 0.12);
}

.page-progress span {
    display: block;
    width: 100%;
    height: 100%;
    background: var(--mint);
    transform: scaleX(0);
    transform-origin: left;
}

@media (max-width: 1680px) {
    .site-header {
        justify-content: space-between;
    }

    .nav-toggle {
        appearance: none;
        display: inline-flex;
        align-items: center;
        gap: 10px;
        margin-left: auto;
        padding: 9px 12px;
        border: 1px solid rgb(255 255 255 / 0.28);
        border-radius: 8px;
        color: #fff;
        background: transparent;
        font: 600 0.85rem var(--font-main);
        cursor: pointer;
    }

    .nav-toggle__icon,
    .nav-toggle__icon::before,
    .nav-toggle__icon::after {
        width: 20px;
        height: 2px;
        display: block;
        background: currentColor;
        transition: transform 180ms var(--motion-ease);
    }

    .nav-toggle__icon {
        position: relative;
    }

    .nav-toggle__icon::before,
    .nav-toggle__icon::after {
        content: "";
        position: absolute;
        left: 0;
    }

    .nav-toggle__icon::before { top: -6px; }
    .nav-toggle__icon::after { top: 6px; }

    .nav-toggle[aria-expanded="true"] .nav-toggle__icon { background: transparent; }
    .nav-toggle[aria-expanded="true"] .nav-toggle__icon::before { top: 0; transform: rotate(45deg); }
    .nav-toggle[aria-expanded="true"] .nav-toggle__icon::after { top: 0; transform: rotate(-45deg); }

    .primary-nav {
        position: absolute;
        top: 100%;
        right: 0;
        left: 0;
        max-height: 0;
        margin: 0;
        overflow: hidden;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0;
        background: var(--navy-deep);
        box-shadow: 0 14px 25px rgb(31 30 75 / 0.24);
        transition: max-height 240ms var(--motion-ease);
    }

    .primary-nav.is-open {
        max-height: 440px;
    }

    .primary-nav a {
        padding: 15px clamp(20px, 5vw, 58px);
        border-bottom: 1px solid rgb(255 255 255 / 0.08);
        font-size: 18px;
    }
}

@media (max-width: 560px) {
    .site-header {
        padding-inline: 14px;
    }

    .brand__logo {
        width: 220px;
        height: auto;
    }

    .nav-toggle__label {
        position: absolute;
        width: 1px;
        height: 1px;
        margin: -1px;
        overflow: hidden;
        clip: rect(0 0 0 0);
    }

    .primary-nav {
        grid-template-columns: 1fr;
        overflow-y: auto;
    }

    .primary-nav.is-open {
        max-height: calc(100vh - var(--header-height));
    }
}