/* ==========================================================================
   ADB Device Manager - Adaptive Reusable Footer Stylesheet
   Dynamically inherits active page variables for perfect integration:
   - Adapts background, text, borders, and accents to host themes
   - Eliminates hardcoded linear gradients or inconsistent colors
   - Aligns with the core documentation visual spacing rhythm
   ========================================================================== */

/* Main Footer Container */
.footer {
    padding: 0;
    background: var(--color-bg-page, #ffffff);
    border-top: 1px solid var(--color-border, #eaeaea);
    color: var(--color-text-body, #444444);
    font-family: var(--font-sans, "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif);
}

.footer-main {
    max-width: 820px;
    /* Aligns perfectly with standard documentation margins */
    margin: 0 auto;
    padding: 48px 24px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

/* Footer Contact Section */
.footer-contact-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-brand .logo-icon {
    width: 32px;
    height: 32px;
    transition: transform 0.15s ease;
}

.footer-brand .logo-icon:hover {
    transform: scale(1.05);
}

.footer-brand-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text-title, #111111);
    letter-spacing: -0.02em;
}

.footer-contact-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-body, #444444);
    font-size: 13px;
    text-decoration: none;
    transition: color 0.15s ease;
}

.footer-contact-item:hover {
    color: var(--color-primary, #2563eb);
}

.footer-contact-item svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    color: var(--color-primary, #2563eb);
}

.footer-contact-item span {
    line-height: 1.5;
}

/* Footer Link Columns */
.footer-column {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-column-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--color-text-title, #111111);
    letter-spacing: -0.01em;
    margin-bottom: 4px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--color-text-muted, #666666);
    font-size: 13px;
    text-decoration: none;
    transition: color 0.15s ease;
    width: fit-content;
}

.footer-links a:hover {
    color: var(--color-primary, #2563eb);
    text-decoration: underline;
}

/* Footer Bottom Section */
.footer-bottom {
    max-width: 820px;
    margin: 0 auto;
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--color-border, #eaeaea);
}

.footer-copyright {
    font-size: 12px;
    color: var(--color-text-muted, #666666);
}

.footer-copyright a {
    color: var(--color-primary, #2563eb);
    text-decoration: none;
    font-weight: 500;
}

.footer-copyright a:hover {
    text-decoration: underline;
}

.footer-bottom-links {
    display: flex;
    gap: 24px;
}

.footer-bottom-links a {
    font-size: 12px;
    color: var(--color-text-muted, #666666);
    text-decoration: none;
    transition: color 0.15s ease;
}

.footer-bottom-links a:hover {
    color: var(--color-primary, #2563eb);
    text-decoration: underline;
}

/* Footer Gradient Border - set to clean border matches */
.footer-gradient-border {
    height: 1px;
    background: var(--color-border, #eaeaea);
}

/* Reusable Footer CTA (Unused on docs but kept for global safety) */
.footer-cta {
    text-align: center;
    padding: 48px 24px;
    background: var(--color-bg-page, #ffffff);
    position: relative;
}

.footer-cta::before {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    max-width: 620px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border, #eaeaea), transparent);
}

.footer-cta h2 {
    font-size: 24px;
    font-weight: 800;
    color: var(--color-text-title, #111111);
    margin-bottom: 12px;
    letter-spacing: -0.03em;
}

.footer-cta p {
    font-size: 14px;
    color: var(--color-text-muted, #666666);
    max-width: 500px;
    margin: 0 auto 24px;
    line-height: 1.6;
}

.footer-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--color-primary, #2563eb);
    color: #ffffff;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 6px;
    transition: background 0.15s ease;
}

.footer-cta-btn:hover {
    background: var(--color-primary-hover, #1d4ed8);
}

/* ==========================================================================
   Responsive Spacing Grid
   ========================================================================== */

@media (max-width: 768px) {
    .footer-main {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px 16px;
        padding: 32px 16px;
    }

    .footer-contact-section {
        grid-column: span 2;
        flex-direction: column;
        gap: 16px;
    }

    .footer-contact-list {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 16px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
        padding: 24px 16px;
    }

    .footer-bottom-links {
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .footer-main {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 24px 16px;
    }

    .footer-contact-section {
        grid-column: span 1;
    }

    .footer-contact-list {
        flex-direction: column;
        gap: 12px;
    }

    .footer-bottom-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px 16px;
    }
}