/* =========================================================
   ArcTec, LLC — Primary Navigation
   ========================================================= */

.site-header {
    position: relative;
    z-index: 100;

    width: 100%;
    min-height: var(--header-height);

    border-bottom: 1px solid var(--color-border);
    background: rgba(25, 27, 39, 0.92);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;

    min-height: var(--header-height);
}


/* =========================================================
   Brand
   ========================================================= */

.site-brand {
    display: inline-flex;
    align-items: center;

    flex: 0 0 auto;

    color: var(--color-text);
    text-decoration: none;
}

.site-brand {
    display: inline-flex;
    align-items: center;

    flex: 0 0 auto;

    color: var(--color-text);
    text-decoration: none;
}

.site-brand__logo {
    display: block;

    width: auto;
    height: 5.5rem;
    max-width: 15rem;

    object-fit: contain;
}


/* =========================================================
   Desktop Navigation
   ========================================================= */

.primary-nav {
    display: flex;
    align-items: center;
}

.primary-nav__list {
    display: flex;
    align-items: center;
    gap: clamp(1.25rem, 2.5vw, 2.75rem);

    margin: 0;
    padding: 0;

    list-style: none;
}

.primary-nav__item {
    position: relative;
}

.primary-nav__link {
    position: relative;

    display: inline-flex;
    align-items: center;

    min-height: 2.75rem;

    color: var(--color-text-muted);
    text-decoration: none;

    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;

    letter-spacing: 0.12em;
    text-transform: uppercase;

    transition:
        color var(--transition-fast),
        background-color var(--transition-fast);
}

.primary-nav__link::after {
    content: "";

    position: absolute;
    right: 0;
    bottom: 0.35rem;
    left: 0;

    height: 1px;

    background: var(--color-primary-bright);

    transform: scaleX(0);
    transform-origin: right;

    transition: transform var(--transition-standard);
}

.primary-nav__link:hover,
.primary-nav__link:focus-visible,
.primary-nav__link[aria-current="page"] {
    color: var(--color-text);
}

.primary-nav__link:hover::after,
.primary-nav__link:focus-visible::after,
.primary-nav__link[aria-current="page"]::after {
    transform: scaleX(1);
    transform-origin: left;
}


/* =========================================================
   Products Dropdown — Control
   ========================================================= */

.primary-nav__product-control {
    display: flex;
    align-items: center;
}

.primary-nav__dropdown-toggle {
    position: relative;

    width: 1.8rem;
    height: 2.75rem;

    margin-left: 0.2rem;
    padding: 0;

    border: 0;
    background: transparent;

    cursor: pointer;
}

.primary-nav__dropdown-toggle span {
    position: absolute;
    top: 50%;
    left: 50%;

    width: 0.45rem;
    height: 0.45rem;

    border-right: 1px solid var(--color-text-muted);
    border-bottom: 1px solid var(--color-text-muted);

    transform:
        translate(-50%, -65%)
        rotate(45deg);

    transition:
        border-color var(--transition-fast),
        transform var(--transition-standard);
}

.primary-nav__dropdown-toggle:hover span,
.primary-nav__dropdown-toggle:focus-visible span {
    border-color: var(--color-primary-bright);
}

.primary-nav__dropdown-toggle[aria-expanded="true"] span {
    transform:
        translate(-50%, -35%)
        rotate(225deg);
}


/* =========================================================
   Products Dropdown — Panel
   ========================================================= */

.primary-nav__dropdown {
    position: absolute;
    z-index: 120;

    top: calc(100% + 1.1rem);
    right: 0;

    width: min(25rem, 90vw);

    border: 1px solid var(--color-border);

    background:
        linear-gradient(
            135deg,
            rgba(55, 183, 229, 0.045),
            transparent 45%
        ),
        var(--color-background);

    box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.28);

    opacity: 0;
    visibility: hidden;

    transform: translateY(-0.75rem);

    transition:
        opacity var(--transition-standard),
        visibility var(--transition-standard),
        transform var(--transition-standard);
}

.primary-nav__dropdown::before {
    content: "";

    position: absolute;
    top: -1.15rem;
    right: 0;

    width: 100%;
    height: 1.15rem;
}

.primary-nav__item--dropdown:hover .primary-nav__dropdown,
.primary-nav__item--dropdown:focus-within .primary-nav__dropdown,
.primary-nav__item--dropdown[data-open="true"] .primary-nav__dropdown {
    opacity: 1;
    visibility: visible;

    transform: translateY(0);
}

.primary-nav__dropdown-header {
    padding: 1rem 1.25rem;

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

.primary-nav__dropdown-header span {
    color: var(--color-primary-bright);

    font-family: var(--font-mono);
    font-size: 0.62rem;
    font-weight: 700;

    letter-spacing: 0.14em;
}

.primary-nav__dropdown-link {
    display: grid;

    grid-template-columns:
        2rem
        minmax(0, 1fr);

    gap: 0.25rem 1rem;

    padding: 1.15rem 1.25rem;

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

    color: var(--color-text);
    text-decoration: none;

    transition:
        background-color var(--transition-fast),
        border-color var(--transition-fast);
}

.primary-nav__dropdown-link:last-child {
    border-bottom: 0;
}

.primary-nav__dropdown-link:hover,
.primary-nav__dropdown-link:focus-visible {
    background: rgba(55, 183, 229, 0.07);
}

.primary-nav__dropdown-link > span {
    grid-row: 1 / 3;

    padding-top: 0.1rem;

    color: var(--color-primary-bright);

    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;

    letter-spacing: 0.1em;
}

.primary-nav__dropdown-link strong {
    color: var(--color-text);

    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 650;
}

.primary-nav__dropdown-link small {
    color: var(--color-text-muted);

    font-family: var(--font-mono);
    font-size: 0.64rem;

    letter-spacing: 0.07em;
    text-transform: uppercase;
}

.primary-nav__dropdown-link--overview {
    background: rgba(255, 255, 255, 0.012);
}


/* =========================================================
   Mobile Navigation Toggle
   ========================================================= */

.nav-toggle {
    display: none;

    width: 3rem;
    height: 3rem;

    padding: 0;

    border: 1px solid var(--color-border);
    background: transparent;

    cursor: pointer;
}

.nav-toggle__icon {
    position: relative;

    display: block;

    width: 1.25rem;
    height: 1px;

    margin-inline: auto;

    background: var(--color-text);
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
    content: "";

    position: absolute;
    left: 0;

    width: 100%;
    height: 1px;

    background: var(--color-text);

    transition:
        transform var(--transition-standard),
        top var(--transition-standard);
}

.nav-toggle__icon::before {
    top: -0.4rem;
}

.nav-toggle__icon::after {
    top: 0.4rem;
}

.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);
}


/* =========================================================
   Responsive Navigation
   ========================================================= */

@media (max-width: 900px) {

    .site-header__inner {
        position: relative;
    }

    .nav-toggle {
        display: block;
        flex: 0 0 auto;
    }

    .primary-nav {
        position: absolute;

        top: 100%;
        right: 0;
        left: 0;

        display: none;

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

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

    .primary-nav[data-open="true"] {
        display: block;
    }

    .primary-nav__list {
        display: flex;
        flex-direction: column;
        align-items: stretch;

        gap: 0;

        width: min(
            calc(100% - (var(--page-gutter) * 2)),
            var(--container-width)
        );

        margin-inline: auto;
        padding-block: 0.75rem;
    }

    .primary-nav__item {
        width: 100%;
    }

    .primary-nav__link {
        width: 100%;
        min-height: 3.75rem;

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

    .primary-nav__list > li:last-child .primary-nav__link {
        border-bottom: 0;
    }


    /* Products control */

    .primary-nav__product-control {
        width: 100%;

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

    .primary-nav__product-control .primary-nav__link {
        flex: 1;

        border-bottom: 0;
    }

    .primary-nav__dropdown-toggle {
        width: 3.75rem;
        height: 3.75rem;

        flex: 0 0 auto;

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


    /* Products submenu */

    .primary-nav__dropdown {
        position: static;

        width: 100%;

        border: 0;
        border-bottom: 1px solid var(--color-border);

        box-shadow: none;

        opacity: 1;
        visibility: visible;

        transform: none;

        display: none;

        background: rgba(55, 183, 229, 0.025);

        transition: none;
    }

    .primary-nav__dropdown::before {
        display: none;
    }

    .primary-nav__item--dropdown:hover .primary-nav__dropdown,
    .primary-nav__item--dropdown:focus-within .primary-nav__dropdown {
        display: none;
    }

    .primary-nav__item--dropdown[data-open="true"] .primary-nav__dropdown {
        display: block;
    }

    .primary-nav__dropdown-header {
        padding-left: 1rem;
    }

    .primary-nav__dropdown-link {
        padding-left: 1rem;
    }


    /* Existing mobile underline */

    .primary-nav__link::after {
        right: auto;
        bottom: 0;
        left: 0;

        width: 3rem;

        transform-origin: left;
    }

}


@media (max-width: 600px) {

    .site-brand__descriptor {
        display: none;
    }

    .site-brand__mark {
        width: 1.75rem;
        height: 1.75rem;
    }

    .primary-nav__dropdown-link {
        grid-template-columns:
            1.75rem
            minmax(0, 1fr);
    }

}