/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Jost', Arial, sans-serif;
    line-height: 1.6;
    color: #555555;
    background-color: #ffffff;
}

img {
    max-width: 100%;
    height: auto;
}

/* Layout components */
.container {
    width: 100%;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 16px;
}

.header {
    background-color: #1c1e53;
    padding: 12px 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 12px;
}


.nav-menu {
    display: none;
}

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: 20px;
    align-items: center;
}

.nav-menu a {
    color: #ffffff;
    text-decoration: none;
    font-family: 'Poppins', Arial, sans-serif;
    font-size: 14px;
    font-weight: 400;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #ccf3ff;
}

.blog-link {
    display: flex;
    align-items: center;
    gap: 6px;
}

.blog-icon {
    width: 16px;
    height: 16px;
}

.login-btn {
    border: 1px solid #ffffff;
    border-radius: 5px;
    padding: 8px 20px;
    color: #ffffff;
    text-decoration: none;
    font-family: 'Poppins', Arial, sans-serif;
    font-size: 14px;
    transition: all 0.3s ease;
}

.login-btn:hover {
    background-color: #ffffff;
    color: #1c1e53;
}

.hamburger {
    display: block;
    background: none;
    border: none;
    color: #ffffff;
    font-size: 24px;
    cursor: pointer;
}

/* Breadcrumb */
.breadcrumb {
    background-color: #f5f5f5;
    padding: 12px 0;
    margin: 10px 10;
    position: relative; 
    z-index: 1;     
    padding-top: 140px;  
    
}

.breadcrumb-content {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: #555555;
    text-decoration: none;
}

.breadcrumb-arrow {
    width: 12px;
    height: 12px;
}

.breadcrumb-current {
    color: #9d9d9d;
}

/* Hero section */
.hero-section {
    background-color: #cddee3;
    position: relative;
    padding: 40px 0;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.hero-left {
    flex: 1;
}

.course-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.category-btn {
    background-color: #eeecec;
    color: #000000;
    padding: 14px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    text-transform: capitalize;
    border: none;
}

.author-profile {
  display: flex;
  align-items: center;
  gap: 10px;
  background-color: #d8eef9;
  padding: 6px 12px;
  border-radius: 20px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.author-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid #ddd;
}

.author-name {
  font-size: 14px;
  font-weight: 500;
  color: #333;
}

.hero-title {
    font-family: 'Exo', Arial, sans-serif;
    font-size: 24px;
    font-weight: 600;
    color: #000000;
    text-transform: capitalize;
    margin-bottom: 20px;
    line-height: 1.2;
}

.course-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.stat-icon {
    width: 14px;
    height: 14px;
}

.stat-text {
    font-size: 14px;
    color: #6c6b6b;
}

.course-card {
    background-color: #ffffff;
    border: 1px solid #e9e9e9;
    border-radius: 20px;
    overflow: hidden;
    margin-top: 20px;
}

.course-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 20px 20px 0 0;
}

.course-pricing {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.price-section {
    display: flex;
    align-items: center;
    gap: 8px;
}

.old-price {
    font-size: 14px;
    color: #9d9d9d;
    text-decoration: line-through;
}

.new-price {
    font-family: 'Exo', Arial, sans-serif;
    font-size: 18px;
    font-weight: 600;
    color: #f51a1a;
    text-transform: capitalize;
}

.start-btn {
    background-color: #1c1e53;
    color: #ffffff;
    padding: 8px 20px;
    border-radius: 24px;
    border: none;
    font-size: 16px;
    font-weight: 500;
    text-transform: capitalize;
    cursor: pointer;
    transition: all 0.3s ease;
}

.start-btn:hover {
    background-color: #2405f2;
    transform: translateY(-2px);
}

/* Tabs section */
.tabs-section {
    margin-top: -40px;
    position: relative;
    z-index: 10;
    margin-left: 50px;
    margin-right: 50px;
}

.tabs-container {
    background-color: #ffffff;
    border: 1px solid #e9e9e9;
    border-radius: 20px 20px 0 0;
    overflow: hidden;
}

.tab-buttons {
    display: flex;
    border-bottom: 1px solid #e9e9e9;
}

.tab-btn {
    flex: 1;
    padding: 12px 16px;
    border: none;
    background-color: transparent;
    font-family: 'Exo', Arial, sans-serif;
    font-size: 16px;
    font-weight: 600;
    text-transform: capitalize;
    color: #000000;
    cursor: pointer;
    transition: all 0.3s ease;
    border-right: 1px solid #e9e9e9;
}

.tab-btn:last-child {
    border-right: none;
}

.tab-btn.active {
    background-color: #f5f5f5;
    color: #2405f2;
}

.tab-btn:hover {
    background-color: #f9f9f9;
}

.tab-content {
    padding: 24px;
    background-color: #f5f5f5;
    border-radius: 0 0 20px 20px;
}

.overview-text {
    font-size: 16px;
    line-height: 1.5;
    color: #555555;
    margin-bottom: 20px;
    text-align: justify;
}

.tab-panel {
display: none;
}

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

/* Overview grid styles */
.overview-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-top: 20px;
}

.overview-card {
    background: white;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    border-left: 4px solid #1c1e53;
}

.overview-card-title {
    font-family: 'Exo', Arial, sans-serif;
    font-size: 20px;
    font-weight: 600;
    color: #1c1e53;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.overview-card-title i {
    color: #2405f2;
    font-size: 22px;
}

.overview-card-content {
    color: #555555;
    line-height: 1.6;
    font-size: 16px;
    text-align: justify
}

.overview-feature-list {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

.overview-feature-list li {
    padding: 8px 0;
    padding-left: 30px;
    position: relative;
    border-bottom: 1px solid #f0f0f0;
}

.overview-feature-list li:last-child {
    border-bottom: none;
}

.overview-feature-list li:before {
    content: "•";
    color: #2405f2;
    font-weight: bold;
    position: absolute;
    left: 10px;
}

.overview-highlight {
    background-color: #f8f9ff;
    padding: 16px;
    border-radius: 8px;
    margin: 12px 0;
    border-left: 3px solid #2405f2;
}

.overview-divider {
    height: 1px;
    background: linear-gradient(to right, transparent, #e0e0e0, transparent);
    margin: 20px 0;
}

/* Curriculum phase headers */
.phase-header {
    background: linear-gradient(135deg, #1c1e53, #2405f2);
    color: white;
    padding: 16px 20px;
    border-radius: 8px;
    margin: 24px 0 16px;
    font-weight: 600;
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.phase-header i {
    font-size: 20px;
}

/* Curriculum section */
.curriculum-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.module {
    background-color: #ffffff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 0 0 1px #e9e9e9;
}

.module-header {
    background-color: #f9f9f9;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    border-bottom: 1px solid #e9e9e9;
    transition: background-color 0.3s ease;
}

.dropdown-icon {
    display: inline-block;
    transition: transform 0.3s ease;
    font-size: 14px;
    color: #333;
}

.module.open .dropdown-icon {
    transform: rotate(1deg);
}

.module-title {
    color: #000;
}

.module-info {
    color: #888;
    font-size: 14px;
}

.module-body {
    display: none;
    flex-direction: column;
    background-color: #fff;
    padding: 12px 16px;
}

.module.open .module-body {
    display: flex;
    gap: 14px;
}

.lesson {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid #f0f0f0;
}

.lesson:last-child {
    border-bottom: none;
}

.lesson-icon {
    margin-right: 8px;
}

.lesson-title {
    color: #000;
    font-size: 15px;
    flex-grow: 1;
}

.lesson-title.preview-link {
    color: #2405f2;
    text-decoration: underline;
    cursor: pointer;
}

.lesson-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}

.preview {
    background-color: #1c1e53;
    color: white;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
}

/* Instructor Tab Styles */
.instructor-card {
    background-color: #fff;
    border-radius: 12px;
    padding: 24px;
    color: #333;
}
strong {
    color: #1c1e53;
}
.instructor-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 16px;
}

.instructor-logo {
    width: 80px;
    height: 80px;
    border-radius: 12px;
    object-fit: cover;
    background-color: #f0f0f0;
}

.instructor-name {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 4px;
}

.instructor-description {
    font-size: 15px;
    color: #555;
    margin: 0;
    text-align: justify;
}

.instructor-stats {
    display: flex;
    gap: 20px;
    font-size: 14px;
    color: #777;
    margin-bottom: 16px;
}

.instructor-stats i {
    margin-right: 6px;
    color: #1c1e53;
}

.instructor-bio {
    font-size: 15px;
    color: #555;
    margin-bottom: 16px;
    text-align: justify;
}

.instructor-socials {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 15px;
    color: #333;
}

.instructor-socials i {
    font-size: 16px;
    color: #000;
    transition: color 0.3s ease;
}

.instructor-socials i:hover {
    color: #2405f2;
}

/* FAQ Styles */
.faq-item {
    background-color: #fff;
    border-radius: 10px;
    margin-bottom: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-question {
    width: 100%;
    padding: 16px 20px;
    font-size: 20px;
    font-weight: 600;
    text-align: left;
    background-color: #fff;
    border: none;
    outline: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    padding: 0 20px 16px;
    display: none;
    font-size: 18px;
    color: #555;
}

.faq-answer p {
    margin: 0;
    line-height: 1.6;
    text-align: justify;
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-item.active .faq-question {
    color: #2405f2;
    font-weight: 700;
}

.dropdown-icon {
    margin-left: 12px;
    transition: transform 0.3s ease;
    color: #999;
}

.faq-item.active .dropdown-icon {
    transform: rotate(180deg);
    color: #2405f2;
}

/* Review Section */
.review-header {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 20px;
}

.review-summary {
    display: flex;
    gap: 40px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.average-rating {
    font-size: 24px;
    font-weight: bold;
}

.rating-score {
    font-size: 36px;
    margin-right: 10px;
}

.rating-stars {
    font-size: 18px;
}

.rating-count {
    font-size: 14px;
    color: #555;
    margin-top: 8px;
}

.rating-bars {
    flex: 1;
    min-width: 300px;
}

.rating-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
    font-size: 14px;
    color: #555;
}

.rating-bar .bar {
    flex: 1;
    height: 6px;
    background-color: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
}

.rating-bar .bar > div {
    height: 100%;
    background-color: #ffc107;
}

.review-card {
    display: flex;
    gap: 16px;
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    align-items: flex-start;
}

.review-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
}

.review-content {
    flex: 1;
}

.review-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.reviewer-name {
    font-size: 16px;
    font-weight: bold;
}

.review-date {
    font-size: 14px;
    color: #888;
}

.review-text {
    font-size: 15px;
    line-height: 1.6;
    margin-top: 8px;
    color: #333;
    text-align: justify;
}

.review-reply {
    font-size: 14px;
    color: #dc3545;
    text-decoration: none;
    margin-top: 10px;
    display: inline-block;
}

.review-reply i {
    margin-right: 4px;
}

.review-pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.page-btn {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 50%;
    background-color: #f0f0f0;
    color: #000;
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.page-btn:hover {
    background-color: #ddd;
}

.page-btn.active {
    background-color: #000;
    color: #fff;
}

/* Comments section */
.comments-section {
    margin-top: 30px;
}

.comments-title {
    font-family: 'Exo', Arial, sans-serif;
    font-size: 18px;
    font-weight: 600;
    color: #000000;
    text-transform: capitalize;
    margin-bottom: 8px;
}

.comments-subtitle {
    font-size: 16px;
    color: #555555;
    margin-bottom: 24px;
}

.comment-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-input {
    padding: 10px 16px;
    border: 1px solid #9d9d9d;
    border-radius: 8px;
    font-size: 16px;
    font-family: 'Jost', Arial, sans-serif;
    color: #555555;
}

.form-input::placeholder {
    color: #9d9d9d;
}

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

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.checkbox {
    width: 16px;
    height: 16px;
}

.checkbox-label {
    font-size: 16px;
    color: #555555;
}

.submit-btn {
    background-color: #1c1e53;
    color: #ffffff;
    padding: 10px 24px;
    border-radius: 24px;
    border: none;
    font-size: 16px;
    font-weight: 500;
    text-transform: capitalize;
    cursor: pointer;
    align-self: flex-start;
    transition: all 0.3s ease;
}

.submit-btn:hover {
    background-color: #2405f2;
    transform: translateY(-2px);
}




/* Mobile-first responsive styles */
@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }
    
    .breadcrumb {
        padding-top: 120px;
        padding-bottom: 8px;
    }
    
    .breadcrumb-content {
        font-size: 12px;
        gap: 4px;
    }
    
    .breadcrumb-arrow {
        width: 10px;
        height: 10px;
    }
    
    .hero-section {
        padding: 20px 0;
    }
    
    .hero-title {
        font-size: 20px;
        margin-bottom: 16px;
    }
    
    .course-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .category-btn {
        padding: 10px 12px;
        font-size: 12px;
    }
    
    .author-profile {
        padding: 4px 8px;
    }
    
    .author-avatar {
        width: 28px;
        height: 28px;
    }
    
    .author-name {
        font-size: 12px;
    }
    
    .course-stats {
        gap: 8px;
    }
    
    .stat-text {
        font-size: 12px;
    }
    
    .course-image {
        height: 180px;
    }
    
    .course-pricing {
        padding: 16px;
        flex-direction: column;
        gap: 12px;
    }
    
    .new-price {
        font-size: 16px;
    }
    
    .start-btn {
        width: 100%;
        padding: 12px 20px;
        font-size: 14px;
        min-height: 44px;
        touch-action: manipulation;
    }
    
    .tabs-section {
        margin-left: 16px;
        margin-right: 16px;
        margin-top: -20px;
    }
    
    .tab-buttons {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        flex: 1 1 auto;
        min-width: calc(50% - 1px);
        padding: 10px 8px;
        font-size: 14px;
        min-height: 44px;
        touch-action: manipulation;
    }
    
    .tab-content {
        padding: 16px;
    }
    
    .overview-text {
        font-size: 14px;
        text-align: left;
    }
    
    .overview-card {
        padding: 16px;
    }
    
    .overview-card-title {
        font-size: 16px;
    }
    
    .overview-card-content {
        font-size: 14px;
        line-height: 1.7;
        text-align: left;
    }
    
    .overview-feature-list li {
        padding: 6px 0;
        padding-left: 25px;
    }
    
    .overview-feature-list li:before {
        left: 8px;
    }
    
    .overview-highlight {
        padding: 12px;
    }
    
    .phase-header {
        padding: 12px 16px;
        font-size: 14px;
    }
    
    .module-header {
        padding: 12px;
        font-size: 14px;
        min-height: 44px;
        touch-action: manipulation;
    }
    
    .module-title {
        font-size: 14px;
    }
    
    .module-info {
        font-size: 12px;
    }
    
    .instructor-header {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    
    .instructor-logo {
        width: 60px;
        height: 60px;
    }
    
    .instructor-name {
        font-size: 16px;
    }
    
    .instructor-description {
        font-size: 13px;
    }
    
    .instructor-stats {
        justify-content: center;
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .instructor-bio {
        font-size: 13px;
        line-height: 1.7;
        align-items: left;
    }
    
    .faq-question {
        padding: 12px 16px;
        font-size: 16px;
        min-height: 44px;
        touch-action: manipulation;
    }
    
    .faq-answer {
        padding: 0 16px 12px;
        font-size: 14px;
    }
    
    .faq-answer p {
        line-height: 1.7;
    }
    
    .review-summary {
        flex-direction: column;
        gap: 20px;
    }
    
    .average-rating {
        text-align: center;
    }
    
    .rating-bars {
        min-width: 250px;
    }
    
    .rating-bar {
        font-size: 12px;
    }
    
    .review-card {
        padding: 16px;
        gap: 12px;
    }
    
    .review-avatar {
        width: 40px;
        height: 40px;
    }
    
    .review-header-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
    
    .reviewer-name {
        font-size: 14px;
    }
    
    .review-date {
        font-size: 12px;
    }
    
    .review-text {
        font-size: 13px;
        line-height: 1.7;
    }
    
    .page-btn {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }
    
    .form-row {
        flex-direction: column;
    }
    
    .form-input {
        font-size: 14px;
        padding: 8px 12px;
    }
    
    .submit-btn {
        width: 100%;
        font-size: 14px;
    }
}

/* Small tablets and large phones */
@media (min-width: 481px) and (max-width: 639px) {
    .container {
        padding: 0 16px;
    }
    
    .breadcrumb {
        padding-top: 130px;
    }
    
    .hero-title {
        font-size: 22px;
    }
    
    .tabs-section {
        margin-left: 20px;
        margin-right: 20px;
    }
    
    .tab-btn {
        font-size: 15px;
        padding: 12px 16px;
    }
    
    .overview-text {
        font-size: 15px;
        text-align: left;
    }
    
    .course-pricing {
        flex-direction: row;
    }
    
    .start-btn {
        width: auto;
    }
}

@media (min-width: 640px) {
    .container {
        padding: 0 24px;
    }
    
    .nav-menu a {
        font-size: 15px;
    }
    
    .login-btn {
        font-size: 15px;
        padding: 10px 24px;
    }
    
    .breadcrumb-content {
        font-size: 15px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .stat-text {
        font-size: 15px;
    }
    
    .course-image {
        height: 220px;
    }
    
    .new-price {
        font-size: 19px;
    }
    
    .tab-btn {
        font-size: 17px;
        padding: 14px 20px;
    }
    
    .overview-text {
        font-size: 17px;
        text-align: left;
    }
    
    .form-row {
        flex-direction: row;
    }
    
    .form-input {
        font-size: 17px;
    }
    
  
    .overview-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .overview-card-full {
        grid-column: 1 / -1;
    }
}

@media (min-width: 768px) {
    .container {
        padding: 0 32px;
    }
    
    .header {
        padding: 16px 0;
    }
    
    .nav-menu {
        display: block;
    }
    
    .nav-menu a {
        font-size: 16px;
    }
    
    .login-btn {
        font-size: 16px;
        padding: 12px 28px;
    }
    
    .hamburger {
        display: none;
    }
    
    .breadcrumb-content {
        font-size: 16px;
    }
    
    .hero-section {
        padding: 50px 0;
    }
    
    .hero-content {
        flex-direction: row;
        align-items: flex-start;
        gap: 40px;
    }
    
    .hero-left {
        flex: 2;
    }
    
    .course-card {
        flex: 1;
        margin-top: 0;
        align-self: flex-start;
        max-width: 350px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .stat-text {
        font-size: 16px;
    }
    
    .course-image {
        height: 250px;
    }
    
    .new-price {
        font-size: 20px;
    }
    
    .start-btn {
        font-size: 18px;
    }
    
    .tabs-section {
        margin-left: 40px;
        margin-right: 40px;
    }
    
    .tab-btn {
        font-size: 18px;
        padding: 16px 24px;
        flex: none;
        min-width: auto;
    }
    
    .tab-buttons {
        flex-wrap: nowrap;
    }
    
    .tab-content {
        padding: 30px;
    }
    
    .overview-text {
        font-size: 18px;
        text-align: left;
    }
    
    .overview-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .instructor-header {
        flex-direction: row;
        text-align: left;
    }
    
    .instructor-stats {
        justify-content: flex-start;
    }
    
    .review-header-row {
        flex-direction: row;
        align-items: center;
    }
    
    .comments-title {
        font-size: 20px;
    }
    
    .comments-subtitle {
        font-size: 18px;
    }
    
    .form-input {
        font-size: 18px;
    }
    
    .checkbox-label {
        font-size: 18px;
    }
    
    .submit-btn {
        font-size: 18px;
        width: auto;
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 48px;
    }
    
    .header {
        padding: 20px 0;
    }
    
    .hero-section {
        padding: 60px 0;
    }
    
    .hero-content {
        gap: 60px;
    }
    
    .hero-title {
        font-size: 36px;
        margin-bottom: 24px;
    }
    
    .course-card {
        max-width: 400px;
    }
    
    .course-image {
        height: 280px;
    }
    
    .tabs-section {
        margin-left: 60px;
        margin-right: 60px;
    }
    
    .tab-btn {
        font-size: 20px;
        padding: 18px 36px;
    }
    
    .tab-content {
        padding: 40px;
    }
    
    .overview-grid {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
        gap: 30px;
    }
    
    .overview-card {
        padding: 28px;
    }
    
    .phase-header {
        padding: 20px 24px;
        font-size: 20px;
    }
    
    .module-header {
        padding: 20px;
        font-size: 18px;
    }
    
    .instructor-card {
        padding: 32px;
    }
    
    .instructor-logo {
        width: 100px;
        height: 100px;
    }
    
    .instructor-name {
        font-size: 22px;
    }
    
    .instructor-description {
        font-size: 16px;
    }
    
    .instructor-bio {
        font-size: 16px;
        align-items: left;
    }
    
    .faq-question {
        padding: 20px 24px;
        font-size: 22px;
    }
    
    .faq-answer {
        padding: 0 24px 20px;
        font-size: 18px;
    }
    
    .review-card {
        padding: 24px;
    }
    
    .review-avatar {
        width: 60px;
        height: 60px;
    }
    
    .reviewer-name {
        font-size: 18px;
    }
    
    .review-text {
        font-size: 16px;
        align-items: left;
    }
}

@media (min-width: 1280px) {
    .container {
        max-width: 1440px;
        padding: 0 64px;
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .course-card {
        max-width: 450px;
    }
    
    .course-image {
        height: 300px;
    }
    
    .tabs-section {
        margin-left: 80px;
        margin-right: 80px;
    }
    
    .tab-content {
        padding: 50px;
    }
    
    .overview-grid {
        grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
        gap: 40px;
    }
}

/* Ultra-wide screens */
@media (min-width: 1440px) {
    .container {
        max-width: 1600px;
        padding: 0 80px;
    }
    
    .hero-content {
        gap: 80px;
    }
    
    .tabs-section {
        margin-left: 100px;
        margin-right: 100px;
    }
}

.tabs-section {
    margin-top: -40px;
    position: relative;
    z-index: 10;
    margin-left: 50px;
    margin-right: 50px;
}

.tabs-container {
    background-color: #ffffff;
    border: 1px solid #e9e9e9;
    border-radius: 20px 20px 0 0;
    overflow: hidden;
}

/* Additional responsive features */

/* Print styles */
@media print {
    .header,
    .breadcrumb,
    .tabs-section,
    .review-pagination,
    .comments-section {
        display: none;
    }
    
    .hero-section {
        background: white;
        padding: 20px 0;
    }
    
    .course-card {
        border: 1px solid #ccc;
    }
    
    .tab-content {
        padding: 20px;
        background: white;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .tab-btn {
        border: 2px solid;
    }
    
    .start-btn {
        border: 2px solid;
    }
    
    .overview-card {
        border: 2px solid #000;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .start-btn,
    .tab-btn,
    .dropdown-icon,
    .module-header {
        transition: none;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a1a1a;
        color: #e0e0e0;
    }
    
    .overview-card,
    .instructor-card,
    .faq-item,
    .review-card {
        background-color: #2a2a2a;
        border-color: #444;
    }
    
    .tab-content {
        background-color: #2a2a2a;
    }
}

/* Instructor Certifications Styles */
.instructor-certifications {
    margin-top: 30px;
    padding: 25px 0;
    border-top: 1px solid #e0e0e0;
}

.certification-title {
    font-size: 20px;
    font-weight: 600;
    color: #1c1e53;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.certification-title i {
    color: #2405f2;
    font-size: 18px;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.certificate-item {
    text-align: center;
    padding: 20px;
    background: #f8f9ff;
    border-radius: 12px;
    border: 2px solid #e0e8ff;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.certificate-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(36, 5, 242, 0.1);
    border-color: #2405f2;
}

.certificate-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2405f2, #1c1e53);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.certificate-item:hover::before {
    transform: scaleX(1);
}

.certificate-image {
    width: 100%;
    max-width: 220px;
    height: auto;
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.certificate-item:hover .certificate-image {
    transform: scale(1.05);
}

/* Center the MIT certificate specifically */
.certificate-item.mit-certificate {
  display: flex;
  justify-content: center;
  align-items: center;
  height: auto; /* Adjust based on your needs */
}

.certificate-item.mit-certificate .certificate-image {
  max-height: 200px;
  width: auto;
  object-fit: contain;
}
.certificate-caption {
    font-size: 14px;
    font-weight: 600;
    color: #333;
    margin: 0;
    line-height: 1.4;
}

/* Responsive adjustments for certificates */
@media (max-width: 768px) {
    .certificates-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .certificate-item {
        padding: 15px;
    }
    
    .certificate-image {
        max-width: 180px;
    }
    
    .certification-title {
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .instructor-certifications {
        padding: 20px 0;
    }
    
    .certificate-item {
        padding: 12px;
    }
    
    .certificate-image {
        max-width: 150px;
    }
    
    .certificate-caption {
        font-size: 12px;
    }
}

/* COMPREHENSIVE MOBILE RESPONSIVE FIXES */

/* Mobile First - Small Devices (480px and down) */
@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    /* Hero Section Mobile */
    .hero-section {
        padding: 40px 0;
    }

    .hero-content {
        flex-direction: column;
        gap: 20px;
    }

    .hero-left {
        order: 1;
    }

    .course-card {
        order: 2;
        margin-top: 20px;
        max-width: 100%;
        width: 100%;
    }

    .hero-title {
        font-size: 24px;
        line-height: 1.3;
        margin-bottom: 16px;
    }

    .course-meta {
        flex-wrap: wrap;
        gap: 8px;
    }

    .category-btn {
        font-size: 12px;
        padding: 6px 12px;
    }

    .author-profile {
        flex-wrap: wrap;
        gap: 8px;
    }

    .author-avatar {
        width: 30px;
        height: 30px;
    }

    .author-name {
        font-size: 13px;
    }

    /* Course Stats Mobile */
    .course-stats {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        margin: 16px 0;
    }

    .stat-item {
        gap: 6px;
    }

    .stat-icon {
        width: 14px;
        height: 14px;
    }

    .stat-text {
        font-size: 13px;
    }

    /* Course Card Mobile */
    .course-image {
        height: 200px;
    }

    .course-pricing {
        padding: 15px;
    }

    .price-section {
        flex-direction: column;
        align-items: center;
        gap: 5px;
        margin-bottom: 15px;
    }

    .old-price {
        font-size: 16px;
    }

    .new-price {
        font-size: 22px;
    }

    .start-btn {
        width: 100%;
        padding: 14px;
        font-size: 16px;
    }

    /* Tabs Mobile */
    .tabs-section {
        margin: 30px 0;
    }

    .tab-buttons {
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
        padding: 0 10px;
    }

    .tab-btn {
        font-size: 13px;
        padding: 10px 16px;
        min-width: auto;
        flex: none;
    }

    .tab-content {
        padding: 20px 15px;
    }

    /* Overview Cards Mobile */
    .overview-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .overview-card {
        padding: 20px;
    }

    .overview-card-title {
        font-size: 18px;
        margin-bottom: 12px;
    }

    .overview-card-content {
        font-size: 14px;
        line-height: 1.5;
        
    }

    /* Curriculum Mobile */
    .curriculum-section {
        padding: 0;
    }

    .phase-header {
        font-size: 18px;
        padding: 15px;
        margin: 20px 0 10px 0;
    }

    .module {
        margin-bottom: 10px;
    }

    .module-header {
        padding: 15px;
        font-size: 15px;
    }

    .module-body {
        padding: 0 15px 15px 15px;
    }

    .lesson {
        padding: 10px 0;
        font-size: 14px;
    }

    /* Instructor Mobile */
    .instructor-card {
        padding: 20px;
    }

    .instructor-header {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }

    .instructor-logo {
        width: 80px;
        height: 80px;
        margin: 0 auto;
    }

    .instructor-name {
        font-size: 20px;
        margin-bottom: 10px;
    }

    .instructor-description {
        font-size: 14px;
        line-height: 1.5;
    }

    .instructor-stats {
        justify-content: center;
        flex-wrap: wrap;
        gap: 15px;
        margin: 15px 0;
    }

    .instructor-stats span {
        font-size: 13px;
    }

    .instructor-bio {
        font-size: 14px;
        line-height: 1.6;
        margin-bottom: 15px;
        align-items: left;
    }

    .instructor-socials {
        justify-content: center;
        flex-wrap: wrap;
        gap: 10px;
    }

    /* FAQ Mobile */
    .faq-question {
        padding: 15px;
        font-size: 15px;
    }

    .faq-answer {
        padding: 0 15px 15px 15px;
    }

    .faq-answer p {
        font-size: 14px;
        line-height: 1.5;
    }

    /* Reviews Mobile */
    .review-header {
        font-size: 22px;
    }

    .review-summary {
        flex-direction: column;
        gap: 20px;
    }

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

    .rating-score {
        font-size: 36px;
    }

    .rating-count {
        font-size: 13px;
    }

    .rating-bars {
        width: 100%;
    }

    .review-card {
        padding: 15px;
    }

    .review-avatar {
        width: 40px;
        height: 40px;
    }

    .reviewer-name {
        font-size: 15px;
    }

    .review-date {
        font-size: 12px;
    }

    .review-text {
        font-size: 14px;
        line-height: 1.5;
    }

    /* Contact CTA Mobile - Already has mobile styles */
}

/* Tablet - Medium Devices (481px to 768px) */
@media (min-width: 481px) and (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    /* Hero Section Tablet */
    .hero-section {
        padding: 50px 0;
    }

    .hero-content {
        flex-direction: column;
        gap: 30px;
    }

    .hero-title {
        font-size: 28px;
        margin-bottom: 18px;
    }

    .course-card {
        max-width: 100%;
        margin-top: 20px;
    }

    .course-image {
        height: 240px;
    }

    /* Course Stats Tablet */
    .course-stats {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }

    /* Tabs Tablet */
    .tab-buttons {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }

    .tab-btn {
        font-size: 14px;
        padding: 12px 20px;
    }

    .tab-content {
        padding: 25px 20px;
    }

    /* Overview Grid Tablet */
    .overview-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .overview-card-full {
        grid-column: 1 / -1;
    }

    /* Instructor Tablet */
    .instructor-header {
        flex-direction: row;
        gap: 20px;
    }

    .instructor-logo {
        width: 100px;
        height: 100px;
    }
}

/* Desktop Small - Large Tablets/Small Desktops (769px to 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        padding: 0 30px;
    }

    .hero-content {
        flex-direction: row;
        gap: 30px;
    }

    .hero-left {
        flex: 2;
    }

    .course-card {
        flex: 1;
        max-width: 320px;
        margin-top: 0;
    }

    .hero-title {
        font-size: 30px;
    }

    .course-stats {
        display: flex;
        flex-wrap: wrap;
        gap: 15px;
    }

    .overview-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .overview-card-full {
        grid-column: 1 / -1;
    }
}

/* Fix for very wide screens */
@media (min-width: 1600px) {
    .tabs-section {
        margin-left: 80px;
        margin-right: 80px;
    }
}