/* Accessibility - Screen Reader Text */
.screen-reader-text {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.screen-reader-text:focus {
    position: static !important;
    width: auto;
    height: auto;
    padding: 0.5em 1em;
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
    background: #fff;
    color: #000;
    border: 2px solid #000;
    border-radius: 3px;
    z-index: 100000;
    font-size: 0.875rem;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 0 2px 2px rgba(0, 0, 0, 0.6);
}

/* Skip to Content Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: #000;
    color: #fff;
    padding: 8px 16px;
    text-decoration: none;
    z-index: 100000;
    font-weight: 700;
}

.skip-link:focus {
    top: 0;
}

/* Header Styles */
body.single-lesson {
    padding-top: 0px !important;
}
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--tutor-color-white, #ffffff);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    gap: 20px;
}

/* Logo */
.site-branding {
    flex-shrink: 0;
}

.site-title a {
    font-size: 24px;
    font-weight: 700;
    color: var(--tutor-color-text-primary, #2c3e50);
    text-decoration: none;
    transition: color 0.3s ease;
}

.site-title a:hover {
    color: var(--tutor-color-primary, #3498db);
}

.site-description {
    font-size: 14px;
    color: #495057; /* Improved contrast: >= 4.5:1 on white background */
    margin: 0;
}

.site-logo img {
    max-height: 45px;
    width: auto;
}

/* Navigation */
.main-navigation {
    flex: 1;
    display: flex;
    justify-content: center;
}

.main-navigation ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 30px;
}

.main-navigation li {
    position: relative;
}

.main-navigation a {
    color: var(--tutor-color-text-primary, #2c3e50);
    text-decoration: none;
    font-weight: bold;
    font-size: 18px;
    padding: 10px 0;
    transition: color 0.3s ease;
    position: relative;
}

.main-navigation a:hover {
    color: var(--tutor-color-primary, #3498db);
}

.main-navigation a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--tutor-color-primary, #3498db);
    transition: width 0.3s ease;
}

.main-navigation a:hover::after {
    width: 100%;
}

/* Active Menu Item */
.main-navigation .current-menu-item a,
.main-navigation .current_page_item a {
    color: var(--tutor-color-primary, #3498db);
    font-weight: 700;
}

.main-navigation .current-menu-item a::after,
.main-navigation .current_page_item a::after {
    width: 100%;
    background: var(--tutor-color-primary, #3498db);
}

/* Active Menu Item with Background */
.main-navigation .current-menu-item a,
.main-navigation .current_page_item a {
    border-radius: 5px;
    padding: 10px 15px;
    margin: 0 -15px;
}

/* Header Actions */
.header-actions {
    flex-shrink: 1;
    display: flex;
    align-items: center;
    gap: 15px;
}

.auth-buttons,
.user-menu {
    display: flex;
    gap: 10px;
}

/* Touch Target Sizes - WCAG 2.5.5 */
.btn,
button,
a[role="button"],
input[type="submit"],
input[type="button"] {
    min-width: 44px; /* WCAG: Minimum touch target size */
    min-height: 30px; /* WCAG: Minimum touch target size */
}

/* Keyboard Navigation - Focus Styles */
.menu-toggle:focus,
.scroll-to-top:focus,
.btn:focus,
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid var(--tutor-color-primary, #3498db);
    outline-offset: 2px;
}

.menu-toggle:focus-visible,
.scroll-to-top:focus-visible,
.btn:focus-visible,
a:focus-visible {
    outline: 2px solid var(--tutor-color-primary, #3498db);
    outline-offset: 2px;
}

/* Remove default outline for mouse users but keep for keyboard */
.menu-toggle:focus:not(:focus-visible),
.scroll-to-top:focus:not(:focus-visible),
.btn:focus:not(:focus-visible),
a:focus:not(:focus-visible) {
    outline: none;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    flex-direction: column;
    gap: 4px;
    min-width: 44px; /* WCAG: Minimum touch target size */
    min-height: 44px; /* WCAG: Minimum touch target size */
}

.menu-toggle-text {
    font-size: 12px;
    color: #2c3e50;
    font-weight: 500;
}

.menu-toggle-icon {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.menu-toggle-icon span {
    width: 20px;
    height: 2px;
    background: #2c3e50;
    transition: all 0.3s ease;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-icon span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 5px);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-icon span:nth-child(2) {
    opacity: 0;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-icon span:nth-child(3) {
    transform: rotate(-45deg) translate(1px, -6px);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Body padding for fixed header */
body {
    padding-top: 70px;
}

/* WordPress Admin Bar Support */
body.admin-bar .site-header {
    top: 32px;
}

body.admin-bar {
    padding-top: 102px; /* 70px header + 32px admin bar */
}

/* Mobile admin bar support */
@media screen and (max-width: 782px) {
    body.admin-bar .site-header {
        top: 46px;
    }
    
    body.admin-bar {
        padding-top: 116px; /* 70px header + 46px mobile admin bar */
    }
}

/* When admin bar is not present, reduce padding */
body:not(.admin-bar) {
    padding-top: 70px;
}

/* Smooth transitions for admin bar changes */
.site-header {
    transition: top 0.3s ease;
}

body {
    transition: padding-top 0.3s ease;
}

/* Hide admin bar on scroll (optional) */
@media screen and (min-width: 783px) {
    .admin-bar .site-header {
        transition: top 0.3s ease;
    }
    
    .admin-bar.scrolled .site-header {
        top: 0;
    }
    
    .admin-bar.scrolled {
        padding-top: 70px;
    }
}

/* Footer Styles */
.site-footer {
    background: var(--tutor-color-dark, #2c3e50);
    color: var(--tutor-color-white, #ecf0f1);
}


.footer-content {
    padding: 60px 0 20px;
}

.footer-widgets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-widget h3.widget-title {
    color: var(--tutor-color-white, #ffffff);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-widget h3.widget-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--tutor-color-primary, #3498db);
}

.footer-widget p {
    color: #e0e0e0; /* Improved contrast: 4.5:1 on dark background */
    line-height: 1.6;
    margin-bottom: 20px;
}

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

.footer-menu li {
    margin-bottom: 10px;
}

.footer-menu a {
    color: #e0e0e0; /* Improved contrast: 4.5:1 on dark background */
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 14px;
}

.footer-menu a:hover {
    color: var(--tutor-color-primary, #3498db);
}

/* Social Links */
.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--tutor-color-dark-light, #34495e);
    color: var(--tutor-color-white, #ecf0f1);
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 16px;
}

.social-link:hover {
    background: var(--tutor-color-primary, #3498db);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

/* Contact Info */
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #e0e0e0; /* Improved contrast: 4.5:1 on dark background */
    font-size: 14px;
}

.contact-item i {
    color: var(--tutor-color-primary, #3498db);
    width: 16px;
    text-align: center;
}

/* Footer Bottom */
.footer-bottom {
    border-top: 1px solid var(--tutor-color-dark-light, #34495e);
    padding: 20px 0;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.copyright p {
    color: #d0d0d0; /* Improved contrast: 4.5:1 on dark background */
    font-size: 14px;
    margin: 0;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: var(--tutor-color-text-primary, #6c757d); /* Improved contrast: 4.5:1 on dark background */
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--tutor-color-primary, #3498db);
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        height: 60px;
    }
    
    body {
        padding-top: 60px;
    }
    
    /* Mobile admin bar support */
    body.admin-bar {
        padding-top: 106px; /* 60px header + 46px mobile admin bar */
    }
    
    body.admin-bar .site-header {
        top: 46px;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .main-navigation {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 50%;
        height: calc(100vh - 60px);
        background: #ffffff;
        flex-direction: column;
        justify-content: flex-start;
        padding: 20px;
        transition: left 0.3s ease;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    }
    
    .main-navigation.active {
        left: 0;
    }
    
    .main-navigation ul {
        flex-direction: column;
        gap: 0;
        width: 100%;
    }
    
    .main-navigation li {
        border-bottom: 1px solid #ecf0f1;
    }
    
    .main-navigation a {
        display: block;
        padding: 15px 0;
        font-size: 16px;
    }
    
    /* Mobile Active Menu Item */
    .main-navigation .current-menu-item a,
    .main-navigation .current_page_item a {
        border-radius: 5px;
        padding: 15px;
        color: var(--tutor-color-primary, #3498db);
        font-weight: 700;
    }
    .main-navigation .current-menu-item a::after, .main-navigation .current_page_item a::after {
        display: none;
    }
    
    .header-actions {
        gap: 10px;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 13px;
    }
    
    .footer-widgets {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .header-container {
        padding: 0 15px;
    }
    
    .footer-container {
        padding: 0 15px;
    }
    
    .site-title a {
        font-size: 20px;
    }
    
    .btn {
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 10px;
    }
}

/* Font Awesome Icons */
/* FontAwesome removed - using SVG icons instead */

/* ========================================== */
/* NEW FOOTER STYLES - Based on Image Design */
/* ========================================== */

.site-footer {
    background: #f8f9fa;
    border-top: 1px solid #e9ecef;
    padding: 40px 0 20px;
    position: relative;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.footer-title {
    font-size: 18px;
    font-weight: 700;
    color: #2c3e50;
    margin: 0 0 15px 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-subtitle {
    font-size: 16px;
    color: var(--tutor-color-text-primary, #2c3e50);
    margin: 0 0 12px 0;
    line-height: 1.4;
}

.footer-address p {
    font-size: 15px;
    color: var(--tutor-color-text-primary, #2c3e50);
    margin: 0;
    line-height: 1.6;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
}

.footer-link {
    color: var(--tutor-color-text-primary, #2c3e50);
    text-decoration: underline;
    font-size: 15px;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: #0056b3;
}

.separator {
    color: var(--tutor-color-text-primary, #2c3e50);
    font-size: 15px;
}

/* Logo Styles */
.logo-group {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.logo-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.vietnam-emblem {
    font-size: 24px;
    color: #ff6b35;
}

.logo-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.logo-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--tutor-color-text-primary, #2c3e50);
    line-height: 1.3;
}

.logo-subtitle {
    font-size: 13px;
    font-weight: 600;
    color: var(--tutor-color-text-primary, #2c3e50);
    line-height: 1.3;
}

.logo-english {
    font-size: 12px;
    color: var(--tutor-color-text-primary, #2c3e50);
    line-height: 1.3;
}

.iom-logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--tutor-color-text-primary, #2c3e50);
}

/* Partner Logos */
.partner-logos {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 15px;
}

.partner-logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.microsoft-logo {
    font-size: 16px;
    font-weight: 600;
    color: var(--tutor-color-text-primary, #2c3e50);
}

.uk-logo {
    font-size: 16px;
    font-weight: 600;
    color: #2c3e50;
}

.asia-foundation-logo {
    font-size: 16px;
    font-weight: 600;
    color: var(--tutor-color-text-primary, #2c3e50);
}

.logo-tagline {
    font-size: 13px;
    color: var(--tutor-color-text-primary, #2c3e50);
    font-style: italic;
    margin-top: 4px;
}

.partner-info {
    margin-top: 15px;
}

.partner-info p {
    font-size: 15px;
    color: var(--tutor-color-text-primary, #2c3e50);
    margin: 0;
    line-height: 1.5;
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    min-width: 44px; /* WCAG: Minimum touch target size */
    min-height: 44px; /* WCAG: Minimum touch target size */
    background: var(--tutor-color-primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
    transition: all 0.3s ease;
    z-index: 1000;
}

.scroll-to-top:hover {
    background: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 123, 255, 0.4);
}

/* Form Accessibility */
form label {
    display: block;
    margin-bottom: 0.5em;
    font-weight: 600;
    color: var(--tutor-color-text-primary, #2c3e50);
}

form input[type="text"],
form input[type="email"],
form input[type="password"],
form input[type="number"],
form input[type="tel"],
form input[type="url"],
form textarea,
form select {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--tutor-color-gray, #ecf0f1);
    border-radius: 5px;
    font-size: 16px; /* Prevent iOS auto-zoom */
    transition: border-color 0.3s ease;
}

form input:focus,
form textarea:focus,
form select:focus {
    outline: 2px solid var(--tutor-color-primary, #3498db);
    outline-offset: 2px;
    border-color: var(--tutor-color-primary, #3498db);
}

form input[required],
form textarea[required],
form select[required] {
    border-left: 4px solid var(--tutor-color-primary, #3498db);
}

form input[aria-invalid="true"],
form textarea[aria-invalid="true"],
form select[aria-invalid="true"] {
    border-color: #dc3545;
    border-left-color: #dc3545;
}

form .error-message,
form .field-error {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.25em;
    display: block;
}

form .field-error {
    margin-top: 0.5em;
}

/* Required field indicator */
form label.required::after {
    content: " *";
    color: #dc3545;
    font-weight: bold;
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 3px solid var(--tutor-color-primary, #3498db);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Image Loading States */
img[loading="lazy"] {
    opacity: 1;
    transition: opacity 0.3s ease;
}

img.loading {
    opacity: 0.5;
}

img.loaded {
    opacity: 1;
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    border-radius: 4px;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.skeleton-image {
    width: 100%;
    height: 200px;
    border-radius: 8px;
}

.skeleton-text {
    height: 1em;
    margin: 0.5em 0;
}

.skeleton-text:last-child {
    width: 80%;
}

/* Error States */
.error-state {
    padding: 2rem;
    text-align: center;
    background: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: 8px;
    color: #856404;
}

.error-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #ffc107;
}

.error-state h3 {
    margin: 0 0 0.5rem 0;
    color: #856404;
}

.error-state p {
    margin: 0;
    color: #856404;
}

/* Success States */
.success-state {
    padding: 1rem;
    background: #d4edda;
    border: 2px solid #28a745;
    border-radius: 8px;
    color: #155724;
    margin: 1rem 0;
}

.success-state i {
    margin-right: 0.5rem;
    color: #28a745;
}

/* Mobile Text Size - Prevent auto-zoom on iOS */
@media (max-width: 768px) {
    /* Ensure minimum font size to prevent auto-zoom */
    body {
        font-size: 16px; /* Minimum to prevent iOS auto-zoom */
    }
    
    input,
    textarea,
    select {
        font-size: 16px; /* Prevent auto-zoom on focus */
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .logo-group {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .partner-logos {
        gap: 15px;
    }
    
    .footer-container {
        padding: 0 15px;
    }
    
    .site-footer {
        padding: 30px 0 15px;
    }
}

@media (max-width: 480px) {
    .footer-title {
        font-size: 16px;
    }
    
    .footer-subtitle {
        font-size: 14px;
    }
    
    .footer-address p,
    .footer-link {
        font-size: 14px;
    }
    
    .logo-title {
        font-size: 12px;
    }
    
    .logo-subtitle {
        font-size: 11px;
    }
    
    .logo-english {
        font-size: 10px;
    }
    
    .scroll-to-top {
        width: 45px;
        height: 45px;
        font-size: 16px;
        bottom: 15px;
        right: 15px;
    }
}