.site-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-3xl) 0 var(--space-xl);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.footer__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer__brand {
    max-width: 300px;
}

.footer__tagline {
    margin-top: var(--space-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-text-muted);
}

.footer__heading {
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer__link {
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--color-accent);
}

.footer__bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--text-xs);
}

.footer__source-links {
    display: flex;
    gap: var(--space-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.footer__source-link {
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.footer__source-link:hover {
    color: var(--color-text-secondary);
}

@media (min-width: 640px) {
    .footer__grid {
        grid-template-columns: 2fr 1fr 1fr;
    }

    .footer__bottom {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

@media (min-width: 1024px) {
    .footer__grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}