/*
 * GMC Layout & Navigation
 * Shared shell: header/navigation, footer, and page container/shell rules.
 * Built on tokens defined in tokens.css - see docs/design/brand-foundation.md.
 */

/* ---------------------------------------------------------------------- */
/* Page shell                                                              */
/* ---------------------------------------------------------------------- */

.gmc-shell {
    max-width: var(--gmc-container-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--gmc-container-gutter-sm);
    padding-right: var(--gmc-container-gutter-sm);
}

@media (min-width: 768px) {
    .gmc-shell {
        padding-left: var(--gmc-container-gutter);
        padding-right: var(--gmc-container-gutter);
    }
}

/* ---------------------------------------------------------------------- */
/* Header / Navigation                                                     */
/* ---------------------------------------------------------------------- */

.gmc-nav {
    background-color: var(--gmc-black);
    color: var(--gmc-white);
    position: sticky;
    top: 0;
    z-index: 1030;
    border-bottom: 1px solid var(--gmc-border-on-dark);
}

.gmc-nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
}

.gmc-nav-brand img {
    width: 110px;
    height: auto;
    display: block;
}

.gmc-nav-links {
    align-items: center;
    gap: 1.75rem;
}

.gmc-nav-link {
    font-family: var(--gmc-font-body);
    font-weight: 500;
    color: var(--gmc-white);
    text-decoration: none;
    opacity: 0.85;
    transition: opacity var(--gmc-transition-fast), color var(--gmc-transition-fast);
    position: relative;
    padding-bottom: 2px;
}

.gmc-nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 100%;
    bottom: -2px;
    height: 2px;
    background-color: var(--gmc-green);
    transition: right var(--gmc-transition-fast);
}

.gmc-nav-link:hover,
.gmc-nav-link.active {
    opacity: 1;
}

.gmc-nav-link:hover::after,
.gmc-nav-link.active::after {
    right: 0;
}

.gmc-nav-cta {
    padding: 0.5rem 1.25rem;
}

.gmc-nav-toggler {
    background: transparent;
    border: 1px solid var(--gmc-border-on-dark);
    border-radius: var(--gmc-radius);
    color: var(--gmc-white);
    padding: 0.4rem 0.6rem;
}

/* Mobile burger menu: drop the links onto their own full-width row and
   stack them vertically (the .collapse element is block by default on
   mobile, so the desktop flex layout does not apply). */
@media (max-width: 991.98px) {
    .gmc-nav-inner {
        flex-wrap: wrap;
    }

    .gmc-nav-links {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        flex-basis: 100%;
        width: 100%;
        gap: 1rem;
        margin-top: 0.5rem;
        padding-top: 1rem;
        border-top: 1px solid var(--gmc-border-on-dark);
    }
}

/* ---------------------------------------------------------------------- */
/* Footer                                                                   */
/* ---------------------------------------------------------------------- */

.gmc-footer {
    background-color: var(--gmc-charcoal);
    color: var(--gmc-white);
    padding-top: 3rem;
    padding-bottom: 2rem;
}

.gmc-footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (min-width: 768px) {
    .gmc-footer-grid {
        grid-template-columns: 1.2fr 1fr 1fr;
        gap: 2.5rem;
    }
}

.gmc-footer-brand img {
    width: 130px;
    height: auto;
    margin-bottom: 1rem;
}

.gmc-footer-tagline {
    opacity: 0.7;
    font-size: var(--gmc-fs-body);
    max-width: 32ch;
}

.gmc-footer-heading {
    font-family: var(--gmc-font-body);
    font-weight: 700;
    font-size: var(--gmc-fs-caption);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--gmc-green);
    margin-bottom: 0.75rem;
}

.gmc-footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.gmc-footer-links a {
    color: var(--gmc-white);
    opacity: 0.8;
    text-decoration: none;
    transition: opacity var(--gmc-transition-fast), color var(--gmc-transition-fast);
}

.gmc-footer-links a:hover {
    opacity: 1;
    color: var(--gmc-green-light);
}

.gmc-footer-bottom {
    border-top: 1px solid var(--gmc-border-on-dark);
    padding-top: 1.25rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    font-size: var(--gmc-fs-caption);
    opacity: 0.7;
}

.gmc-footer-bottom a {
    color: inherit;
}