/* LabKlas 2.0 - Enhanced Styling */
/* Behoudt originele kleuren en lettertypes maar met verbeterde structuur */

/* ========== CSS VARIABLES ========== */
:root {
    /* Originele kleuren behouden */
    --primary-color: #F4EFE6;
    --secondary-color: #2A2520;
    --accent-color: #A18249;
    --text-color: #F4EFE6;
    --background-color: #1C160C;
    --hover-color: #2A2520;
    
    /* Logo paths voor dark/light theme */
    --logo-path: url('img/tools/logo_notext_white.svg');
    
    /* Spacing & Layout */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Typography */
    --font-family: "Plus Jakarta Sans", "Noto Sans", sans-serif;
}

.light-theme {
    --primary-color: #1C160C;
    --secondary-color: #EDEAE3;
    --accent-color: #916F31;
    --text-color: #1C160C;
    --background-color: #F8F5F0;
    --hover-color: #E4E0D7;
    
    /* Logo paths voor light theme */
    --logo-path: url('img/tools/logo_notext.svg');
}

/* ========== BASE STYLES ========== */
* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

main {
    flex: 1;
}

/* ========== TYPOGRAPHY ========== */
h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--spacing-md) 0;
    line-height: 1.2;
    font-weight: 700;
}

h1 {
    font-size: 2.5rem;
    font-weight: 900;
    letter-spacing: -0.025em;
}

h2 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

h3 {
    font-size: 1.5rem;
    font-weight: 700;
}

p {
    margin: 0 0 var(--spacing-md) 0;
}

/* ========== NAVIGATION ========== */
.navbar {
    background-color: var(--background-color);
    border-bottom: 1px solid var(--secondary-color);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
    color: inherit;
}

.brand-logo {
    width: 80px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.brand-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    content: var(--logo-path);
}

.brand-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-color);
    margin: 0;
    letter-spacing: -0.015em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-dropdown {
    position: relative;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    letter-spacing: 0.025em;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-link:hover {
    background-color: var(--hover-color);
    opacity: 0.8;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--background-color);
    border: 1px solid var(--secondary-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    z-index: 1000;
    padding: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-color);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
    font-size: 0.875rem;
}

.dropdown-item:hover {
    background-color: var(--hover-color);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 500;
    font-size: 0.875rem;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--background-color);
}

.btn-primary:hover {
    background-color: var(--accent-color);
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-color);
}

.btn-secondary:hover {
    background-color: var(--hover-color);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-color);
    border: 2px solid var(--secondary-color);
}

.btn-outline:hover {
    background-color: var(--secondary-color);
}

.btn-support {
    background-color: #00b9fe;
    color: white;
}

.btn-support:hover {
    background-color: #0095d1;
}

.btn-icon {
    padding: var(--spacing-sm);
    background-color: var(--secondary-color);
    color: var(--text-color);
    min-width: 40px;
    height: 40px;
    justify-content: center;
}

.btn-icon:hover {
    background-color: var(--hover-color);
}

.btn-text {
    white-space: nowrap;
}

.mobile-menu-btn {
    display: none;
}

/* ========== HERO SECTION ========== */
.hero {
    padding: var(--spacing-xl) 0;
}

.hero-container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.hero-image {
    position: relative;
    width: 100%;
    height: 250px;
    margin-bottom: var(--spacing-xl);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-content {
    text-align: left;
    max-width: 800px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 900;
    color: var(--text-color);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.033em;
    line-height: 1.1;
}

.hero-description {
    font-size: 1rem;
    color: var(--accent-color);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ========== LOADING STATE ========== */
.loading-section {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-3xl) 0;
}

.loading-spinner {
    text-align: center;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--secondary-color);
    border-top: 3px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-spinner p {
    color: var(--accent-color);
    font-size: 0.875rem;
    margin: 0;
}

/* ========== MAIN CONTENT (matching original layout) ========== */
.main-content {
    padding: var(--spacing-md) var(--spacing-xl);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 0;
    margin-top: 0;
}

.content-container {
    display: flex;
    flex-direction: column;
    max-width: 960px;
    flex: 1;
}

/* ========== INTRO SECTION (matching original) ========== */
.intro-section {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    padding-top: var(--spacing-sm);
}

.intro-section > div {
    display: flex;
    min-width: 18rem;
    flex-direction: column;
    gap: var(--spacing-md);
}

.intro-title {
    font-size: 2.25rem;
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.033em;
    color: var(--text-color);
    margin: 0 0 var(--spacing-md) 0;
}

.intro-description {
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--accent-color);
    margin: 0;
}

/* ========== EVALUATIE TOOLS BUTTON ========== */
.evaluatie-button-section {
    padding: var(--spacing-lg) var(--spacing-md);
    padding-top: var(--spacing-md);
}

.evaluatie-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: transparent;
    border: 2px solid var(--accent-color);
    border-radius: 12px;
    color: var(--accent-color);
    font-size: 1.125rem;
    font-weight: 700;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all 0.3s ease;
    outline: 1px solid var(--accent-color);
    outline-offset: -1px;
}

.evaluatie-button:hover {
    background-color: var(--accent-color);
    color: var(--background-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.evaluatie-button:active {
    transform: translateY(0);
}

.evaluatie-button i:first-child {
    font-size: 1.25rem;
}

.evaluatie-button i:last-child {
    font-size: 1rem;
    margin-left: auto;
}

/* ========== CATEGORY FILTER ========== */
.category-filter {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    padding-top: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.category-filter-btn {
    background-color: transparent;
    color: var(--accent-color);
    border: 1px solid var(--secondary-color);
    border-radius: 12px;
    padding: 4px 12px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-transform: lowercase;
}

.category-filter-btn:hover {
    background-color: var(--secondary-color);
    color: var(--text-color);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.category-filter-btn.active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.category-filter-label {
    white-space: nowrap;
}

.category-separator {
    width: 1px;
    height: 20px;
    background-color: var(--secondary-color);
    opacity: 0.3;
    margin: 0 8px;
    align-self: center;
}

/* ========== SECTIONS ========== */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.courses-section {
    padding: var(--spacing-3xl) 0;
    background-color: var(--secondary-color);
    transition: background-color var(--transition-normal);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.025em;
}

.section-description {
    font-size: 1.125rem;
    color: var(--accent-color);
    max-width: 600px;
    margin: 0 auto;
}

/* ========== TOOL CARDS ========== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(1, minmax(0, 1fr));
    gap: 1.5rem; /* gap-6 equivalent */
    padding: 0.75rem; /* p-3 equivalent */
}

.tool-card {
    background-color: var(--secondary-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-md);
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    text-decoration: none;
    color: inherit;
}

.tool-image {
    height: 160px;
    background-color: rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.tool-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.tool-card:hover .tool-image img {
    transform: scale(1.05);
}

.tool-content {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}

.tool-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.tool-description {
    color: var(--accent-color);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-lg);
    flex: 1;
}


/* ========== COURSE CARDS ========== */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
}

.course-card {
    background-color: var(--background-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.course-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.course-icon {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.course-icon img {
    width: 80px;
    height: 80px;
    object-fit: contain;
}

.course-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.course-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.course-description {
    color: var(--accent-color);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.course-topics {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--spacing-xl) 0;
    flex: 1;
}

.course-topics li {
    padding: var(--spacing-xs) 0;
    color: var(--accent-color);
    position: relative;
    padding-left: var(--spacing-lg);
}

.course-topics li::before {
    content: "✓";
    color: var(--accent-color);
    font-weight: 700;
    position: absolute;
    left: 0;
}

.course-content .btn {
    margin-top: auto;
    align-self: center;
}

/* ========== FOOTER ========== */
.footer {
    background-color: var(--background-color);
    border-top: 1px solid var(--secondary-color);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.footer-brand {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    width: 80px;
    height: 80px;
    object-fit: contain;
    object-position: top left;
    content: var(--logo-path);
}

.footer-brand h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-color);
    margin: 0;
    line-height: 1;
}

.footer-description {
    color: var(--accent-color);
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-section h4 {
    color: var(--accent-color);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

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

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-color);
}

.version-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.version-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background-color: var(--secondary-color);
    color: var(--text-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-lg);
    font-size: 0.75rem;
    font-weight: 500;
    width: fit-content;
}

.update-info {
    color: var(--accent-color);
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    opacity: 0.8;
}

.version-description {
    color: var(--accent-color);
    font-size: 0.75rem;
    opacity: 0.7;
    line-height: 1.4;
}

.footer-bottom {
    border-top: 1px solid var(--secondary-color);
    padding-top: var(--spacing-md);
    text-align: center;
}

.footer-bottom p {
    color: var(--accent-color);
    font-size: 0.875rem;
    margin: 0;
    opacity: 0.8;
}

/* ========== MODAL ========== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    overflow-y: auto;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(28, 22, 12, 0.7);
}

.modal-dialog {
    position: relative;
    width: 100%;
    max-width: 500px;
    margin: var(--spacing-lg);
    z-index: 1001;
}

.modal-content {
    background-color: var(--background-color);
    border: 1px solid var(--secondary-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-xl);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.modal-header h3 {
    color: var(--text-color);
    margin: 0;
}

.modal-body {
    margin-bottom: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

/* ========== FORMS ========== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    color: var(--text-color);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.form-control {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--secondary-color);
    border-radius: var(--radius-md);
    background-color: var(--background-color);
    color: var(--text-color);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(161, 130, 73, 0.1);
}

.form-control::placeholder {
    color: var(--accent-color);
    opacity: 0.6;
}

.form-error {
    color: #ef4444;
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    display: none;
}

/* ========== MOBILE MENU ========== */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

.mobile-menu.show {
    display: block;
}

.mobile-menu-content {
    width: 280px;
    height: 100%;
    background-color: var(--background-color);
    box-shadow: var(--shadow-xl);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
}

.mobile-menu.show .mobile-menu-content {
    transform: translateX(0);
}

.mobile-menu-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--secondary-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mobile-menu-title {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-color);
}

.mobile-nav {
    padding: var(--spacing-lg);
}

.mobile-nav-section {
    margin-bottom: var(--spacing-xl);
}

.mobile-nav-section h3 {
    color: var(--accent-color);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.mobile-nav-section a {
    display: block;
    color: var(--text-color);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xs);
    transition: background-color var(--transition-fast);
}

.mobile-nav-section a:hover {
    background-color: var(--hover-color);
}

.mobile-nav-link {
    font-size: 1.125rem;
    font-weight: 500;
}

.mobile-nav-actions {
    margin-top: var(--spacing-xl);
}

/* ========== RESPONSIVE DESIGN ========== */
/* ========== RESPONSIVE BREAKPOINTS (updated for better layout) ========== */
/* lg: 1024px and up - 3 columns */
@media (min-width: 1024px) {
    .tools-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr)); /* lg:grid-cols-3 */
    }
}

/* md: 768px and up - 3 columns (changed from 2) */
@media (min-width: 768px) {
    .tools-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr)); /* md:grid-cols-3 */
    }
}

/* Additional responsive adjustments */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .courses-grid {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .brand-title {
        display: none;
    }
    
    .brand-logo {
        width: 100px;
        height: 40px;
    }
    
    .nav-actions .btn-text {
        display: none;
    }
    
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .hero-container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-image {
        height: 180px;
        margin-bottom: var(--spacing-lg);
    }
    
    .hero-title {
        font-size: 2rem;
        margin-bottom: var(--spacing-md);
    }
    
    .hero-description {
        font-size: 0.9rem;
        margin-bottom: var(--spacing-lg);
    }
    
    .hero-actions {
        justify-content: center;
        text-align: center;
    }
    
    .hero-actions .btn {
        flex: 1;
        min-width: 140px;
        justify-content: center;
    }
    
    /* Main content responsive adjustments */
    .main-content {
        padding: var(--spacing-md);
    }
    
    .intro-title {
        font-size: 1.75rem;
    }
    
    .intro-description {
        font-size: 0.9rem;
    }
    
    .courses-section {
        padding: var(--spacing-xl) 0;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .section-description {
        font-size: 1rem;
    }
    
    .tools-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr)); /* 3 columns on tablets */
        gap: 1.5rem;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .tool-image {
        height: 120px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .footer-brand {
        justify-content: center;
    }
}

@media (max-width: 640px) {
    .nav-container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-container {
        padding: 0 var(--spacing-sm);
    }
    
    .section-container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-image {
        height: 160px;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .nav-actions {
        gap: var(--spacing-sm);
    }
    
    .nav-actions .btn {
        min-width: 36px;
        height: 36px;
        padding: var(--spacing-xs);
    }
    
    .tools-grid {
        grid-template-columns: repeat(1, minmax(0, 1fr)); /* 1 column on mobile like original */
        gap: 1.5rem;
    }
    
    .tool-image {
        height: 120px; /* Smaller images on mobile like original */
    }
}

@media (max-width: 359px) {
    .nav-container {
        padding: 0 var(--spacing-xs);
    }
    
    .hero-container {
        padding: 0 var(--spacing-xs);
    }
    
    .section-container {
        padding: 0 var(--spacing-xs);
    }
    
    .nav-actions .btn {
        min-width: 32px;
        height: 32px;
    }
    
    .hero-image {
        height: 140px;
    }
}

/* ========== ACCESSIBILITY ========== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (prefers-contrast: high) {
    :root {
        --accent-color: #B8954F;
        --secondary-color: #2F2B26;
    }
    
    .light-theme {
        --accent-color: #8A6B28;
        --secondary-color: #E0DDD6;
    }
}

/* Focus styles for keyboard navigation */
.btn:focus,
.nav-link:focus,
.form-control:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Ensure interactive elements have sufficient contrast */
.tool-link:focus,
.footer-links a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* ========== ACCESS LEVEL STYLING ========== */
.access-badge {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    z-index: 10;
}

/* ========== CATEGORY BADGE STYLING ========== */
.category-badges {
    display: flex;
    flex-wrap: nowrap;
    gap: 4px;
    margin-top: 8px;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
}

.category-badges::-webkit-scrollbar {
    display: none; /* Chrome/Safari */
}

.category-badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 10px;
    font-size: 0.65rem;
    font-weight: 700;
    background-color: transparent;
    border: 1.5px solid var(--accent-color);
    color: var(--accent-color);
    text-transform: lowercase;
    white-space: nowrap;
    flex-shrink: 0;
    transition: all 0.2s ease;
    outline: 1px solid var(--accent-color);
    outline-offset: -1px;
}

.category-badge.filter-active {
    color: white;
    border-color: transparent;
    outline: none;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

.access-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-left: var(--spacing-xs);
    display: inline-block;
}

/* Login button states */
.btn.logged-in {
    position: relative;
}

.btn.teacher-access {
    border-left: 3px solid #3B82F6;
}

.btn.admin-access {
    border-left: 3px solid #EF4444;
}

/* Tool card access level styling */
.tool-card.access-teacher {
    border-left: 3px solid #3B82F6;
}

.tool-card.access-admin {
    border-left: 3px solid #EF4444;
}

/* Modal access info styling */
.access-info {
    background-color: var(--hover-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.access-info p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-color);
    font-size: 0.9rem;
}

.access-info ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.access-info li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
    color: var(--accent-color);
    font-size: 0.875rem;
}

.access-info li i {
    color: var(--accent-color);
    width: 16px;
}

/* Admin button styling */
#adminButton {
    background-color: #EF4444;
    color: white;
    border: none;
    font-weight: 600;
    position: relative;
    overflow: hidden;
}

#adminButton:hover {
    background-color: #DC2626;
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

#adminButton.admin-visible {
    animation: slideInFromRight 0.3s ease-out;
}

@keyframes slideInFromRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Mobile responsive admin button */
@media (max-width: 768px) {
    #adminButton .btn-text {
        display: none;
    }
    
    #adminButton {
        min-width: 40px;
        padding: var(--spacing-sm);
    }
}