/* ========== CSS Variables & Base Styles ========== */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --accent: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --dark-bg: #0f172a;
    --card-bg: #1e293b;
    --border-color: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --success: #10b981;
    --info: #06b6d4;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
}

/* ========== Navbar ========== */
.navbar {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo a {
    text-decoration: none;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary);
}

/* ========== Buttons ========== */
.btn-primary, .btn-cta, .btn-pricing, .btn-secondary {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    font-weight: 600;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-primary.full-width {
    width: 100%;
}

.btn-cta {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    margin-top: 1.5rem;
}

.btn-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}

.btn-pricing {
    background-color: var(--accent);
    color: white;
    width: 100%;
}

.btn-pricing:hover {
    background-color: #059669;
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
}

.btn-secondary:hover {
    background-color: rgba(99, 102, 241, 0.1);
}

/* ========== Landing Page ========== */
.hero {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem;
    text-align: center;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-subtext {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ========== Features Section ========== */
.features {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.features h2, .curriculum h2, .pricing h2, .testimonials h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
    text-align: center;
}

.feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.1);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-secondary);
}

/* ========== Curriculum Section ========== */
.curriculum {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.modules-preview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.module-preview {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.module-preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.module-preview:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
}

.module-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.module-preview h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.module-preview p {
    color: var(--text-secondary);
}

/* ========== Pricing Section ========== */
.pricing {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    justify-items: center;
}

.pricing-card {
    background-color: var(--card-bg);
    padding: 2.5rem;
    border-radius: 1rem;
    border: 2px solid var(--primary);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.pricing-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 2rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.pricing-features li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.pricing-features li:last-child {
    border-bottom: none;
}

/* ========== Testimonials ========== */
.testimonials {
    background-color: var(--card-bg);
    padding: 4rem 2rem;
    margin: 4rem 0;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.testimonial {
    background-color: rgba(99, 102, 241, 0.05);
    padding: 2rem;
    border-radius: 1rem;
    border-left: 4px solid var(--primary);
}

.testimonial p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.testimonial-author {
    font-weight: 600;
    color: var(--primary);
}

/* ========== Footer ========== */
.footer {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
}

.footer-content p {
    margin: 0.25rem 0;
}

/* ========== Auth Page ========== */
.auth-container {
    max-width: 500px;
    margin: 4rem auto;
    padding: 2rem;
}

.auth-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
}

.auth-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: 1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
    border-bottom: 2px solid transparent;
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.auth-form h2 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.form-subtitle {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input:not([type="checkbox"]) {
    width: 100%;
    padding: 0.75rem;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s;
}

.form-group input:not([type="checkbox"]):focus {
    outline: none;
    border-color: var(--primary);
    background-color: rgba(99, 102, 241, 0.05);
}

.form-group.checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group.checkbox input {
    width: auto;
}

.form-group.checkbox label {
    margin-bottom: 0;
}

.error-message {
    color: var(--danger);
    margin-bottom: 1rem;
    padding: 0.75rem;
    background-color: rgba(239, 68, 68, 0.1);
    border-radius: 0.5rem;
    display: none;
}

.error-message.show {
    display: block;
}

.auth-footer {
    text-align: center;
    margin-top: 2rem;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
}

/* ========== Dashboard ========== */
.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.dashboard-title h1 {
    font-size: 2.5rem;
}

.dashboard-title p {
    color: var(--text-secondary);
}

.user-info {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.user-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.user-details p {
    margin: 0;
    color: var(--text-secondary);
}

.user-details p.name {
    color: var(--text-primary);
    font-weight: 600;
}

.btn-logout {
    background-color: transparent;
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-logout:hover {
    background-color: rgba(239, 68, 68, 0.1);
}

/* ========== Progress Dashboard ========== */
.progress-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.progress-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
}

.progress-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.progress-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 1rem;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    width: 0%;
    transition: width 0.3s;
}

/* ========== Modules Grid ========== */
.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.module-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
}

.module-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.1);
}

.module-header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    padding: 2rem;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.module-num {
    font-size: 2.5rem;
    font-weight: 700;
    opacity: 0.3;
}

.module-content {
    padding: 2rem;
}

.module-content h3 {
    margin-bottom: 0.5rem;
}

.module-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.module-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.module-stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.module-progress {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.module-progress-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

/* ========== Lesson Viewer ========== */
.lesson-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.lesson-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.lesson-title h1 {
    font-size: 2rem;
}

.lesson-nav {
    display: flex;
    gap: 1rem;
}

.lesson-content {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 2rem;
}

.video-player {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    overflow: hidden;
    margin-bottom: 2rem;
}

.video-placeholder {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    color: white;
    font-size: 3rem;
}

.video-placeholder p {
    margin-top: 1rem;
    font-size: 1rem;
}

.lesson-details {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
}

.lesson-details h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.lesson-meta {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.lesson-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.lesson-description {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.lesson-description h2 {
    margin-bottom: 1rem;
}

.lesson-description p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

/* ========== Resources Section ========== */
.resources {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.resources h3 {
    margin-bottom: 1rem;
}

.resource-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.resource-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 0.5rem;
    text-decoration: none;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.resource-item:hover {
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--primary);
}

.resource-icon {
    font-size: 1.5rem;
}

/* ========== Quiz Page ========== */
.quiz-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.quiz-header {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.quiz-title {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.quiz-info {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.quiz-question {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.question-number {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.question-text {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.answer-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.answer-option {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s;
}

.answer-option:hover {
    border-color: var(--primary);
    background-color: rgba(99, 102, 241, 0.05);
}

.answer-option input[type="radio"] {
    cursor: pointer;
    width: 1.2rem;
    height: 1.2rem;
}

.answer-option input[type="radio"]:checked {
    accent-color: var(--primary);
}

.quiz-navigation {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 2rem;
}

.quiz-results {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    border: 1px solid var(--border-color);
}

.results-score {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 1rem;
}

.results-message {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

.results-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.result-item {
    background-color: rgba(99, 102, 241, 0.05);
    padding: 1rem;
    border-radius: 0.5rem;
}

.result-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.result-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

/* ========== Admin Panel ========== */
.admin-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.admin-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.admin-tab-btn {
    padding: 1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
    border-bottom: 2px solid transparent;
}

.admin-tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.admin-content {
    display: none;
}

.admin-content.active {
    display: block;
}

.admin-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.admin-stat-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
}

.admin-stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.admin-stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
}

.admin-table {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    overflow: hidden;
}

.admin-table table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th {
    background-color: rgba(99, 102, 241, 0.1);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--primary);
    border-bottom: 1px solid var(--border-color);
}

.admin-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.admin-table tr:last-child td {
    border-bottom: none;
}

.admin-actions {
    display: flex;
    gap: 0.5rem;
}

.admin-actions button {
    padding: 0.35rem 0.75rem;
    background-color: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
    border-radius: 0.3rem;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s;
}

.admin-actions button:hover {
    background-color: var(--primary);
    color: white;
}

/* ========== Certificate ========== */
.certificate-container {
    display: flex;
    justify-content: center;
    padding: 2rem;
}

.certificate {
    width: 100%;
    max-width: 900px;
    height: 600px;
    background: linear-gradient(135deg, #ffffff 0%, #f0f4ff 100%);
    border: 8px solid var(--primary);
    border-radius: 1rem;
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    box-shadow: 0 20px 50px rgba(99, 102, 241, 0.2);
    position: relative;
    overflow: hidden;
}

.certificate::before {
    content: '★';
    position: absolute;
    top: 20px;
    left: 30px;
    font-size: 2rem;
    color: var(--primary);
    opacity: 0.3;
}

.certificate::after {
    content: '★';
    position: absolute;
    bottom: 20px;
    right: 30px;
    font-size: 2rem;
    color: var(--primary);
    opacity: 0.3;
}

.cert-content {
    position: relative;
    z-index: 1;
}

.cert-seal {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.cert-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.cert-subtitle {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 2rem;
}

.cert-recipient {
    font-size: 1.5rem;
    color: #000;
    font-weight: 600;
    margin: 1.5rem 0;
    text-decoration: underline;
}

.cert-text {
    font-size: 1rem;
    color: #666;
    margin: 1rem 0;
    max-width: 500px;
}

.cert-footer {
    margin-top: 2rem;
    display: flex;
    justify-content: space-between;
    width: 100%;
    align-items: flex-end;
}

.cert-date, .cert-signature {
    font-size: 0.9rem;
    color: #666;
}

.cert-signature-line {
    width: 150px;
    border-top: 2px solid #000;
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2rem;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .features-grid, .modules-preview {
        grid-template-columns: 1fr;
    }

    .dashboard-content {
        grid-template-columns: 1fr;
    }

    .lesson-content {
        grid-template-columns: 1fr;
    }

    .admin-table {
        overflow-x: auto;
    }

    .certificate {
        height: auto;
        padding: 2rem;
    }

    .cert-title {
        font-size: 2rem;
    }

    .cert-footer {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .hero-content h1 {
        font-size: 1.5rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .btn-cta {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }

    .auth-card {
        padding: 1.5rem;
    }

    .progress-overview {
        grid-template-columns: 1fr;
    }

    .results-details {
        grid-template-columns: 1fr;
    }
}