/* ==========================================================================
   FOOTER
   ========================================================================== */

.site-footer {
    position: relative;
    margin-top: 10rem;
    padding: 3.5rem 2rem 0;
    background: var(--glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid #e6b77c45;
    color: var(--text-color);
}

/* Match the sidebar's visibility breakpoint, even when it remains in the DOM. */
@media (min-width: 651px) {
    body:has(#sidebar) .site-footer {
        margin-left: 3em;
    }
}

/* ---------- Grid ---------- */

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
    gap: var(--gap-lg);
    max-width: 1280px;
    margin: 0 auto;
}

/* ---------- Brand column ---------- */

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--gap-sm);
}

.footer-logo-link {
    display: inline-flex;
    align-items: center;
    gap: var(--gap-sm);
    text-decoration: none;
}

.footer-logo-img {
    height: 40px;
    width: auto;
}

.footer-logo-text {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-color);
}

.footer-tagline {
    font-size: var(--font-size-sm);
    opacity: 0.75;
    line-height: 1.6;
    max-width: 30ch;
}

/* Social icons */

.footer-socials {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.footer-social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--glass);
    color: var(--text-color);
    border: 1px solid var(--secondary);
    transition: background var(--transition-short),
                color var(--transition-short),
                transform var(--transition-short);
}

.footer-social-link:hover,
.footer-social-link:focus-visible {
    background: var(--secondary);
    color: var(--text-secondary);
    transform: translateY(-3px);
}

.footer-social-link svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

/* ---------- Link columns ---------- */

.footer-column-heading {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin-bottom: 1.1rem;
    color: var(--secondary);
    letter-spacing: 0.03em;
}

.footer-link-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.footer-link-list a {
    text-decoration: none;
    color: var(--text-color);
    font-size: var(--font-size-sm);
    opacity: 0.8;
    transition: opacity var(--transition-short),
                color var(--transition-short),
                padding-left var(--transition-short);
    display: inline-block;
}

.footer-link-list a:hover,
.footer-link-list a:focus-visible {
    opacity: 1;
    color: var(--secondary);
    padding-left: 4px;
}

/* ---------- Newsletter ---------- */

.footer-newsletter {
    display: flex;
    flex-direction: column;
    gap: var(--gap-sm);
}

.footer-newsletter-copy {
    font-size: var(--font-size-sm);
    opacity: 0.75;
    line-height: 1.6;
}

.footer-newsletter-form {
    display: flex;
    gap: 0.5rem;
}

.footer-newsletter-input {
    flex: 1;
    min-width: 0;
    padding: 0.65rem 1rem;
    border: 1px solid var(--secondary);
    border-radius: var(--radius);
    background: var(--glass);
    color: var(--text-color);
    font-size: var(--font-size-sm);
    font-family: inherit;
    transition: border-color var(--transition-short),
                box-shadow var(--transition-short);
}

.footer-newsletter-input::placeholder {
    color: var(--text-color);
    opacity: 0.45;
}

.footer-newsletter-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(230, 183, 124, 0.2);
}

.footer-newsletter-input.is-invalid {
    border-color: var(--error-border);
    box-shadow: 0 0 0 3px var(--error-bg);
}

.footer-newsletter-btn {
    padding: 0.65rem 1.25rem;
    border: none;
    border-radius: var(--radius);
    background: var(--secondary);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    transition: background var(--transition-short),
                transform var(--transition-short),
                box-shadow var(--transition-short);
}

.footer-newsletter-btn:hover,
.footer-newsletter-btn:focus-visible {
    background: var(--accent);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow);
}

.footer-newsletter-feedback {
    font-size: 0.8rem;
    min-height: 1.2em;
    transition: opacity var(--transition-short);
}

.footer-newsletter-feedback.is-success {
    color: var(--success-border);
}

.footer-newsletter-feedback.is-error {
    color: var(--error-border);
}

/* ---------- Bottom bar ---------- */

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1280px;
    margin: 2.5rem auto 0;
    padding: 1.25rem 0;
    border-top: 1px solid #e6b77c45;
    font-size: 0.8rem;
    opacity: 0.7;
}

.footer-copyright {
    margin: 0;
}

.footer-back-to-top {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    text-decoration: none;
    color: var(--text-color);
    font-weight: var(--font-weight-semiregular);
    transition: color var(--transition-short),
                opacity var(--transition-short);
}

.footer-back-to-top:hover,
.footer-back-to-top:focus-visible {
    color: var(--secondary);
    opacity: 1;
}

.footer-back-to-top svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
    transition: transform var(--transition-short);
}

.footer-back-to-top:hover svg {
    transform: translateY(-2px);
}

/* ==========================================================================
   RESPONSIVE — matches project breakpoint at 650px
   ========================================================================== */

@media (max-width: 900px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--gap-lg) var(--gap-md);
    }
}

@media (max-width: 650px) {
    .site-footer {
        padding: 2.5rem 1.25rem 0;
        margin-top: 2.5rem;
        margin-left: 0px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--gap-lg);
    }

    .footer-newsletter-form {
        flex-direction: column;
    }

    .footer-newsletter-btn {
        width: 100%;
        text-align: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
    }

    /* Ensure tappable social targets */
    .footer-social-link {
        width: 44px;
        height: 44px;
    }
}