/**
 * Enhanced Footer Styles
 * 
 * Implements a 4-column responsive footer layout with newsletter signup.
 *
 * @package TCP_Crypto_Widgets
 */

/* ==========================================================================
   Footer Main Container
   ========================================================================== */

.site-footer-enhanced {
    background: var(--color-bg-secondary, #F8FAFC);
    border-top: 1px solid var(--color-border, #E5E7EB);
    margin-top: auto;
}

.site-footer-enhanced .footer-main {
    padding: var(--space-12, 3rem) 0;
}

/* ==========================================================================
   Footer Grid - 4 Column Layout
   ========================================================================== */

.footer-grid-enhanced {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: var(--space-8, 2rem);
}

/* ==========================================================================
   Footer Columns
   ========================================================================== */

.footer-column {
    display: flex;
    flex-direction: column;
}

.footer-column-title {
    font-size: var(--text-sm, 0.875rem);
    font-weight: var(--font-bold, 700);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text, #1A1A1A);
    margin-bottom: var(--space-4, 1rem);
    padding-bottom: var(--space-2, 0.5rem);
    border-bottom: 2px solid var(--color-primary, #0052FF);
    display: inline-block;
    width: fit-content;
}

/* ==========================================================================
   About Column
   ========================================================================== */

.footer-about .footer-logo {
    display: inline-block;
    margin-bottom: var(--space-4, 1rem);
}

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

.footer-about .footer-logo-text .site-title {
    font-size: var(--text-xl, 1.25rem);
    font-weight: var(--font-bold, 700);
    color: var(--color-text, #1A1A1A);
}

.footer-about .footer-description {
    font-size: var(--text-sm, 0.875rem);
    color: var(--color-text-secondary, #4A5568);
    line-height: var(--leading-relaxed, 1.625);
    margin-bottom: var(--space-4, 1rem);
}

/* ==========================================================================
   Social Links
   ========================================================================== */

.footer-social {
    display: flex;
    gap: var(--space-3, 0.75rem);
    flex-wrap: wrap;
}

.footer-social .social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    background: var(--color-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E5E7EB);
    border-radius: var(--radius-md, 8px);
    color: var(--color-text-secondary, #4A5568);
    transition: all var(--transition-fast, 150ms ease);
    -webkit-tap-highlight-color: transparent;
}

.footer-social .social-link:hover {
    background: var(--color-primary, #0052FF);
    border-color: var(--color-primary, #0052FF);
    color: var(--color-white, #FFFFFF);
    transform: translateY(-2px);
}

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

/* ==========================================================================
   Footer Links
   ========================================================================== */

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: var(--space-2, 0.5rem);
}

.footer-links a {
    font-size: var(--text-sm, 0.875rem);
    color: var(--color-text-secondary, #4A5568);
    text-decoration: none;
    transition: color var(--transition-fast, 150ms ease);
    display: inline-block;
    padding: var(--space-1, 0.25rem) 0;
}

.footer-links a:hover {
    color: var(--color-primary, #0052FF);
}

/* ==========================================================================
   Newsletter Column
   ========================================================================== */

.footer-newsletter .newsletter-description {
    font-size: var(--text-sm, 0.875rem);
    color: var(--color-text-secondary, #4A5568);
    line-height: var(--leading-relaxed, 1.625);
    margin-bottom: var(--space-4, 1rem);
}

.footer-newsletter-form {
    margin-top: var(--space-2, 0.5rem);
}

.newsletter-input-group {
    display: flex;
    gap: var(--space-2, 0.5rem);
}

.newsletter-input {
    flex: 1;
    padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
    font-size: var(--text-sm, 0.875rem);
    border: 1px solid var(--color-border, #E5E7EB);
    border-radius: var(--radius-md, 8px);
    background: var(--color-bg, #FFFFFF);
    color: var(--color-text, #1A1A1A);
    transition: border-color var(--transition-fast, 150ms ease), box-shadow var(--transition-fast, 150ms ease);
}

.newsletter-input:focus {
    outline: none;
    border-color: var(--color-primary, #0052FF);
    box-shadow: 0 0 0 3px rgba(0, 82, 255, 0.1);
}

.newsletter-input::placeholder {
    color: var(--color-text-muted, #6B7280);
}

.newsletter-submit {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
    background: var(--color-primary, #0052FF);
    color: var(--color-white, #FFFFFF);
    border: none;
    border-radius: var(--radius-md, 8px);
    cursor: pointer;
    transition: background var(--transition-fast, 150ms ease), transform var(--transition-fast, 150ms ease);
    min-width: 48px;
    min-height: 44px;
    -webkit-tap-highlight-color: transparent;
}

.newsletter-submit:hover {
    background: var(--color-primary-dark, #0041CC);
    transform: translateY(-1px);
}

.newsletter-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.newsletter-submit svg {
    width: 20px;
    height: 20px;
}

.newsletter-message {
    margin-top: var(--space-2, 0.5rem);
    font-size: var(--text-sm, 0.875rem);
    min-height: 20px;
}

.newsletter-message.success {
    color: var(--color-success, #10B981);
}

.newsletter-message.error {
    color: var(--color-error, #EF4444);
}

/* ==========================================================================
   Footer Bottom
   ========================================================================== */

.site-footer-enhanced .footer-bottom {
    background: var(--color-bg-tertiary, #F1F5F9);
    padding: var(--space-4, 1rem) 0;
    border-top: 1px solid var(--color-border, #E5E7EB);
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4, 1rem);
}

.footer-copyright {
    font-size: var(--text-sm, 0.875rem);
    color: var(--color-text-secondary, #4A5568);
}

/* ==========================================================================
   Legal Links
   ========================================================================== */

.footer-legal-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4, 1rem);
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-legal-links li {
    margin: 0;
}

.footer-legal-links a {
    font-size: var(--text-sm, 0.875rem);
    color: var(--color-text-secondary, #4A5568);
    text-decoration: none;
    transition: color var(--transition-fast, 150ms ease);
}

.footer-legal-links a:hover {
    color: var(--color-primary, #0052FF);
}

/* ==========================================================================
   Dark Mode Support
   ========================================================================== */

[data-theme="dark"] .site-footer-enhanced,
.dark-mode .site-footer-enhanced {
    background: var(--color-bg-secondary);
    border-top-color: var(--color-border);
}

[data-theme="dark"] .footer-column-title,
.dark-mode .footer-column-title {
    color: var(--color-text);
}

[data-theme="dark"] .footer-about .footer-logo-text .site-title,
.dark-mode .footer-about .footer-logo-text .site-title {
    color: var(--color-text);
}

[data-theme="dark"] .footer-about .footer-description,
[data-theme="dark"] .footer-links a,
[data-theme="dark"] .footer-newsletter .newsletter-description,
[data-theme="dark"] .footer-copyright,
[data-theme="dark"] .footer-legal-links a,
.dark-mode .footer-about .footer-description,
.dark-mode .footer-links a,
.dark-mode .footer-newsletter .newsletter-description,
.dark-mode .footer-copyright,
.dark-mode .footer-legal-links a {
    color: var(--color-text-secondary);
}

[data-theme="dark"] .footer-social .social-link,
.dark-mode .footer-social .social-link {
    background: var(--color-bg-tertiary);
    border-color: var(--color-border);
    color: var(--color-text-secondary);
}

[data-theme="dark"] .newsletter-input,
.dark-mode .newsletter-input {
    background: var(--color-bg-tertiary);
    border-color: var(--color-border);
    color: var(--color-text);
}

[data-theme="dark"] .site-footer-enhanced .footer-bottom,
.dark-mode .site-footer-enhanced .footer-bottom {
    background: var(--color-bg-tertiary);
    border-top-color: var(--color-border);
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

/* Tablet (768px - 1024px) */
@media (max-width: 1024px) {
    .footer-grid-enhanced {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6, 1.5rem);
    }

    .footer-about {
        grid-column: span 2;
    }
}

/* Mobile (< 768px) */
@media (max-width: 768px) {
    .site-footer-enhanced .footer-main {
        padding: var(--space-8, 2rem) 0;
    }

    .footer-grid-enhanced {
        grid-template-columns: 1fr;
        gap: var(--space-6, 1.5rem);
    }

    .footer-about {
        grid-column: span 1;
        text-align: center;
    }

    .footer-about .footer-logo {
        justify-content: center;
    }

    .footer-social {
        justify-content: center;
    }

    .footer-column {
        text-align: center;
    }

    .footer-column-title {
        margin-left: auto;
        margin-right: auto;
    }

    .footer-links {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .footer-newsletter {
        text-align: center;
    }

    .newsletter-input-group {
        flex-direction: column;
    }

    .newsletter-submit {
        width: 100%;
    }

    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-legal-links {
        justify-content: center;
    }
}

/* Small Mobile (< 480px) */
@media (max-width: 480px) {
    .footer-social .social-link {
        width: 44px;
        height: 44px;
    }

    .footer-legal-links {
        flex-direction: column;
        gap: var(--space-2, 0.5rem);
    }
}

/* ==========================================================================
   Accessibility
   ========================================================================== */

.footer-social .social-link:focus,
.footer-links a:focus,
.footer-legal-links a:focus,
.newsletter-input:focus,
.newsletter-submit:focus {
    outline: 2px solid var(--color-primary, #0052FF);
    outline-offset: 2px;
}

/* Ensure touch targets are at least 44x44px */
@media (pointer: coarse) {
    .footer-links a {
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .footer-legal-links a {
        min-height: 44px;
        display: flex;
        align-items: center;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .site-footer-enhanced {
        background: none;
        border-top: 1px solid #000;
    }

    .footer-social,
    .footer-newsletter-form {
        display: none;
    }

    .footer-grid-enhanced {
        grid-template-columns: repeat(3, 1fr);
    }
}