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

.hlogo {
    width: 224px;
    height: auto;
    border-radius: 24px;
}

.hlogo1 {
    width: 124px;
    height: auto;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #F0F8FF;
}

h1, h2, h3, h4, h5, h6 {
    font-family:'Poppins', serif;
    font-weight: 600;
}

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

.header {
    background: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    color: #000;
    text-decoration: none;
}

.logo i {
    color: #FFA500;
    margin-right: 8px;
    font-size: 32px;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: #666;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover,
.nav-link.active {
    color: #FFA500;
}

.auth-buttons {
    display: flex;
    gap: 16px;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

.mobile-menu {
    display: none;
    background: white;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.mobile-nav-link {
    display: block;
    padding: 10px 0;
    color: #666;
    text-decoration: none;
    border-bottom: 1px solid #eee;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 16px;
    gap: 8px;
}

.btn-primary {
    background: #FFA500;
    color: #000;
}

.btn-primary:hover {
    background: #FF8C00;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: #666;
    border: 1px solid #ddd;
}

.btn-outline:hover {
    background: #f5f5f5;
}

.btn-dark {
    background: #000;
    color: white;
}

.btn-dark:hover {
    background: #333;
}

.btn-outline-dark {
    background: transparent;
    color: #000;
    border: 1px solid #000;
}

.btn-outline-dark:hover {
    background: #000;
    color: white;
}

.btn-full {
    width: 100%;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
}

.hero {
    background: linear-gradient(135deg, #FFA500, #FF8C00);
    color: #000;
    padding: 80px 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 24px;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.featured-courses {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
    color: #000;
}

.section-header p {
    font-size: 1.25rem;
    color: #666;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.course-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: all 0.3s;
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.course-image {
    position: relative;
    overflow: hidden;
}

.course-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s;
}

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

.course-category {
    position: absolute;
    top: 12px;
    left: 12px;
    background: #FFA500;
    color: #000;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.course-content {
    padding: 24px;
}

.course-title {
    font-size: 1.25rem;
    margin-bottom: 8px;
    color: #000;
}

.course-description {
    color: #666;
    margin-bottom: 16px;
    font-size: 14px;
    line-height: 1.5;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    font-size: 14px;
    color: #666;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.meta-item i {
    color: #FFA500;
}

.course-instructor {
    color: #666;
    font-size: 14px;
    margin-bottom: 16px;
}

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.course-price {
    font-size: 1.5rem;
    font-weight: bold;
    color: #FFA500;
}

.features {
    background: white;
    padding: 80px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 48px;
}

.feature-card {
    text-align: center;
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: #FFA500;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.feature-icon i {
    font-size: 32px;
    color: #000;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: #000;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

.footer {
    background: #000;
    color: white;
    padding: 48px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-bottom: 32px;
}


.footer-logo {
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 16px;
}

.footer-logo i {
    color: #FFA500;
    margin-right: 8px;
    font-size: 24px;
}

.footer-section h4 {
    margin-bottom: 16px;
    color: white;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: #FFA500;
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 24px;
    text-align: center;
    color: #ccc;
}

.course-detail-container {
    padding: 40px 0;
}

.back-link {
    display: inline-flex;
    align-items: center;
    color: #666;
    text-decoration: none;
    margin-bottom: 32px;
    gap: 8px;
}

.back-link:hover {
    color: #FFA500;
}

.course-detail-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 48px;
}

.course-header {
    margin-bottom: 32px;
}

.course-header .course-category {
    position: static;
    display: inline-block;
    margin-bottom: 16px;
}

.course-header h1 {
    font-size: 2.5rem;
    margin-bottom: 16px;
    color: #000;
}

.course-header p {
    font-size: 1.25rem;
    color: #666;
    margin-bottom: 24px;
}

.course-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 32px;
}

.tabs {
    margin-top: 32px;
}

.tab-buttons {
    display: flex;
    border-bottom: 1px solid #ddd;
    margin-bottom: 32px;
}

.tab-btn {
    background: none;
    border: none;
    padding: 16px 24px;
    cursor: pointer;
    font-weight: 500;
    color: #666;
    border-bottom: 2px solid transparent;
    transition: all 0.3s;
}

.tab-btn.active,
.tab-btn:hover {
    color: #FFA500;
    border-bottom-color: #FFA500;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

.card {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-bottom: 24px;
}

.card h3 {
    margin-bottom: 24px;
    color: #000;
}

.objectives-list {
    list-style: none;
}

.objectives-list li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 16px;
    gap: 12px;
}

.objectives-list i {
    color: #FFA500;
    margin-top: 2px;
}

.curriculum-modules {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.module-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.module-header {
    background: #f8f9fa;
    padding: 20px 24px;
    border-bottom: 1px solid #eee;
}

.module-title {
    font-size: 1.25rem;
    color: #000;
    margin: 0;
}

.module-lessons {
    padding: 24px;
}

.lesson-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    background: #f8f9fa;
    border-radius: 8px;
    margin-bottom: 12px;
}

.lesson-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.lesson-info i {
    color: #FFA500;
}

.lesson-duration {
    display: flex;
    align-items: center;
    gap: 4px;
    color: #666;
    font-size: 14px;
}

.instructor-info {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.instructor-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
}

.instructor-info h3 {
    margin-bottom: 12px;
    color: #000;
}

.instructor-info p {
    color: #666;
    line-height: 1.6;
}

.reviews-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.review-card {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.review-author h4 {
    margin-bottom: 8px;
    color: #000;
}

.review-rating {
    display: flex;
    gap: 2px;
}

.review-rating i {
    color: #ffc107;
    font-size: 14px;
}

.review-date {
    color: #666;
    font-size: 14px;
}

.review-comment {
    color: #666;
    line-height: 1.6;
}

.course-sidebar {
    position: sticky;
    top: 100px;
}

.sidebar-card {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.price {
    font-size: 2rem;
    font-weight: bold;
    color: #FFA500;
    text-align: center;
    margin-bottom: 24px;
}

.course-info {
    margin: 32px 0;
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid #eee;
}

.info-item:last-child {
    border-bottom: none;
}

.progress-section {
    margin-top: 32px;
}

.progress-section h4 {
    margin-bottom: 16px;
    color: #000;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #eee;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: #FFA500;
    transition: width 0.3s;
}

.study-guide-container {
    padding: 40px 0;
}

.study-guide-header {
    text-align: center;
    margin-bottom: 48px;
}

.header-icons {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
}

.header-icons i {
    font-size: 48px;
    color: #FFA500;
}

.study-guide-header h1 {
    font-size: 2.5rem;
    margin-bottom: 16px;
    color: #000;
}

.study-guide-header p {
    font-size: 1.25rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.study-guide-form {
    max-width: 800px;
    margin: 0 auto 48px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #FFA500;
}

.form-group textarea {
    height: 100px;
    resize: vertical;
}

.generated-guide {
    max-width: 800px;
    margin: 0 auto;
}

.guide-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 24px;
}

.guide-header h2 {
    font-size: 2rem;
    color: #000;
    margin-bottom: 16px;
}

.guide-badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.badge {
    background: #FFA500;
    color: #000;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-outline {
    background: transparent;
    color: #666;
    border: 1px solid #ddd;
}

.guide-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.guide-sections {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 32px;
}

.guide-section {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.guide-section h3 {
    margin-bottom: 24px;
    color: #000;
}

.guide-section ul {
    list-style: none;
}

.guide-section li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 12px;
    gap: 12px;
}

.guide-section li::before {
    content: '';
    width: 8px;
    height: 8px;
    background: #FFA500;
    border-radius: 50%;
    margin-top: 8px;
    flex-shrink: 0;
}

.cta-card {
    background: #FFA500;
    color: #000;
}

.cta-card h3 {
    color: #000;
}

.dashboard-container {
    padding: 40px 0;
}

.dashboard-header {
    margin-bottom: 48px;
}

.dashboard-header h1 {
    font-size: 2.5rem;
    margin-bottom: 8px;
    color: #000;
}

.dashboard-header p {
    font-size: 1.25rem;
    color: #666;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.stat-card {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-icon {
    width: 64px;
    height: 64px;
    background: #FFA500;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon i {
    font-size: 32px;
    color: #000;
}

.stat-info p {
    color: #666;
    margin-bottom: 4px;
    font-size: 14px;
}

.stat-info h3 {
    font-size: 2rem;
    color: #000;
    margin: 0;
}

.dashboard-tabs {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    overflow: hidden;
}

.enrolled-courses {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.enrolled-course {
    display: flex;
    gap: 24px;
    padding: 24px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.enrolled-course:hover {
    transform: translateY(-2px);
}

.course-thumbnail {
    width: 120px;
    height: 80px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
}

.enrolled-course-content {
    flex: 1;
}

.enrolled-course-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.enrolled-course-info h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
    color: #000;
}

.enrolled-course-info p {
    color: #666;
    margin-bottom: 4px;
}

.next-lesson {
    font-size: 14px;
    color: #666;
}

.course-progress {
    margin-top: 16px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 14px;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: #f8f9fa;
    border-radius: 8px;
}

.activity-icon {
    width: 40px;
    height: 40px;
    background: #FFA500;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.activity-icon i {
    color: #000;
}

.activity-content {
    flex: 1;
}

.activity-content p {
    margin-bottom: 4px;
    font-weight: 500;
}

.activity-content span {
    color: #666;
    font-size: 14px;
}

.activity-time {
    color: #666;
    font-size: 14px;
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.achievement-card {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 24px;
}

.achievement-card.earned {
    border: 2px solid #FFA500;
}

.achievement-card.not-earned {
    opacity: 0.6;
}

.achievement-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.achievement-icon.earned {
    background: #FFA500;
}

.achievement-icon.not-earned {
    background: #eee;
}

.achievement-icon i {
    font-size: 24px;
}

.achievement-icon.earned i {
    color: #000;
}

.achievement-icon.not-earned i {
    color: #999;
}

.achievement-info h3 {
    margin-bottom: 8px;
    color: #000;
}

.achievement-info p {
    color: #666;
    margin-bottom: 12px;
}

.earned-badge {
    background: #FFA500;
    color: #000;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.auth-page {
    background: #F0F8FF;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-container {
    max-width: 400px;
    width: 100%;
    margin: 0 auto;
    padding: 20px;
}

.auth-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    overflow: hidden;
}

.auth-header {
    text-align: center;
    padding: 40px 40px 20px;
}

.auth-logo {
    width: 64px;
    height: 64px;
    background: #FFA500;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.auth-logo i {
    font-size: 32px;
    color: #000;
}

.auth-header h1 {
    font-size: 2rem;
    margin-bottom: 8px;
    color: #000;
}

.auth-header p {
    color: #666;
}

.auth-form {
    padding: 20px 40px 40px;
}

.auth-form h2 {
    margin-bottom: 8px;
    color: #000;
}

.auth-form > p {
    color: #666;
    margin-bottom: 32px;
}

.input-with-icon {
    position: relative;
}

.input-with-icon i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
}

.input-with-icon input {
    padding-left: 40px;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
}

.checkmark {
    width: 16px;
    height: 16px;
    border: 1px solid #ddd;
    border-radius: 3px;
    position: relative;
}

.forgot-link {
    color: #FFA500;
    text-decoration: none;
    font-size: 14px;
}

.forgot-link:hover {
    text-decoration: underline;
}

.auth-divider {
    text-align: center;
    margin: 24px 0;
    position: relative;
}

.auth-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #eee;
}

.auth-divider span {
    background: white;
    padding: 0 16px;
    color: #666;
    font-size: 14px;
}

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

.auth-footer p {
    color: #666;
    font-size: 14px;
}

.auth-footer a {
    color: #FFA500;
    text-decoration: none;
    font-weight: 600;
}

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

.payment-container {
    padding: 40px 0;
}

.payment-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    max-width: 1000px;
    margin: 0 auto;
}

.order-summary .card {
    margin-bottom: 0;
}

.order-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid #eee;
}

.order-item img {
    width: 80px;
    height: 60px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
}

.item-details {
    flex: 1;
}

.item-details h4 {
    margin-bottom: 4px;
    color: #000;
}

.item-details p {
    color: #666;
    font-size: 14px;
    margin-bottom: 2px;
}

.item-price {
    font-size: 1.25rem;
    font-weight: bold;
    color: #FFA500;
}

.order-totals {
    margin-bottom: 24px;
}

.total-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.final-total {
    font-weight: bold;
    font-size: 1.125rem;
    padding-top: 8px;
    border-top: 1px solid #eee;
}

.final-total span:last-child {
    color: #FFA500;
}

.included-features {
    background: #f0f9ff;
    padding: 20px;
    border-radius: 8px;
}

.included-features h4 {
    margin-bottom: 12px;
    color: #0f766e;
}

.included-features ul {
    list-style: none;
    color: #0f766e;
}

.included-features li {
    margin-bottom: 4px;
    font-size: 14px;
}

.payment-form .card {
    margin-bottom: 0;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-divider {
    height: 1px;
    background: #eee;
    margin: 24px 0;
}

.security-notice {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #f8f9fa;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 24px;
    font-size: 14px;
    color: #666;
}

.security-notice i {
    color: #28a745;
}

.payment-terms {
    text-align: center;
    font-size: 12px;
    color: #666;
    margin-top: 16px;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    border-radius: 12px;
    max-width: 400px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.success-content {
    padding: 48px;
    text-align: center;
}

.success-content i {
    font-size: 64px;
    color: #28a745;
    margin-bottom: 24px;
}

.success-content h2 {
    margin-bottom: 16px;
    color: #000;
}

.success-content p {
    color: #666;
    margin-bottom: 32px;
    line-height: 1.6;
}

.success-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .nav,
    .auth-buttons {
        display: none;
    }
    
    .mobile-menu.active {
        display: block;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .course-detail-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .course-sidebar {
        position: static;
        order: -1;
    }
    
    .guide-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .guide-actions {
        width: 100%;
        justify-content: flex-start;
    }
    
    .payment-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .enrolled-course {
        flex-direction: column;
    }
    
    .enrolled-course-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .achievements-grid {
        grid-template-columns: 1fr;
    }
    
    .achievement-card {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .tab-buttons {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        flex: 1;
        min-width: 120px;
    }
    
    .auth-form {
        padding: 20px;
    }
    
    .auth-header {
        padding: 30px 20px 15px;
    }
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #333;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

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

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.hidden {
    display: none;
}

.visible {
    display: block;
}