/* ==========================================================================
   S-008 Global Footer - Lum-Tech
   ==========================================================================
   Dark-envelope footer with 4 columns plus brand column. Deeper-navy
   surface with hairline top divider echoing header's hairline bottom
   border. Contact column has distinct labels vs links.
   ========================================================================== */

.site-footer {
    background-color: var(--bg-darker);
    color: var(--gray-300);
    border-top: 1px solid var(--border-color);
    position: relative;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120%;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(0, 102, 204, 0.25) 30%,
        rgba(0, 102, 204, 0.25) 70%,
        transparent 100%
    );
}

.site-footer__main {
    padding: 80px 0 56px;
}

.site-footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1.3fr;
    gap: 48px;
}

/* Brand column */
.site-footer__brand {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 320px;
}

.site-footer__logo-link {
    display: inline-flex;
    align-items: center;
    transition: opacity var(--transition-fast) var(--ease-out);
}

.site-footer__logo-link:hover,
.site-footer__logo-link:focus-visible {
    opacity: 0.8;
    outline: none;
}

.site-footer__logo {
    display: block;
    height: 52px;
    width: auto;
    max-width: 200px;
    /* Native white SVG — no filter hack. */
}

.site-footer__tagline {
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 300;
    line-height: 1.6;
    color: var(--gray-300);
    margin: 0;
    max-width: 260px;
}

/* Columns */
.site-footer__column {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.site-footer__column-title {
    font-family: var(--font-body);
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.22em;
    color: var(--color-accent);
    margin: 0 0 4px 0;
}

.site-footer__list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-footer__list li {
    margin: 0;
}

.site-footer__link {
    display: inline-block;
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 300;
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast) var(--ease-out);
}

.site-footer__link:hover,
.site-footer__link:focus-visible {
    color: var(--color-accent);
    outline: none;
}

.site-footer__label {
    display: block;
    font-family: var(--font-body);
    font-size: 10px;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--gray-400);
    margin-bottom: 2px;
}

.site-footer__address {
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 300;
    line-height: 1.55;
    font-style: normal;
    color: var(--gray-300);
    margin: 0;
}

/* Bottom bar */
.site-footer__bottom {
    padding: 24px 0;
    border-top: 1px solid var(--border-color);
}

.site-footer__bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.site-footer__copyright {
    font-family: var(--font-body);
    font-size: 12px;
    font-weight: 300;
    color: var(--gray-400);
    margin: 0;
}

.site-footer__legal-list {
    display: flex;
    gap: 24px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-footer__link--small {
    font-size: 12px;
    color: var(--gray-400);
}

.site-footer__link--small:hover,
.site-footer__link--small:focus-visible {
    color: var(--color-accent);
}


@media (max-width: 1100px) {
    .site-footer__grid {
        grid-template-columns: 1.5fr 1fr 1fr;
        gap: 40px;
    }

    .site-footer__brand {
        grid-column: 1 / -1;
        max-width: none;
        margin-bottom: 24px;
    }

    .site-footer__brand .site-footer__tagline {
        max-width: 420px;
    }

    .site-footer__column--contact {
        grid-column: 1 / -1;
    }
}

@media (max-width: 640px) {
    .site-footer__grid {
        grid-template-columns: 1fr 1fr;
    }

    .site-footer__column--contact {
        grid-column: 1 / -1;
    }

    .site-footer__bottom-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}


@media (prefers-reduced-motion: reduce) {
    .site-footer__logo-link,
    .site-footer__link,
    .site-footer__link--small {
        transition-duration: 0s;
    }
}