/* Course Detail Hero Section */
.course-hero {
    padding: 60px 0;
    margin: 60px 0;
    background-color: var(--bg-light);
}

.course-header {
    display: grid;
    grid-template-columns: 1.5fr 1fr;  /* Adjusted ratio */
    gap: 40px;
    align-items: flex-start;
    max-width: 1200px;
    margin: 0 auto;
}

.course-info {
    padding-right: 20px;
}

.course-info h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    line-height: 1.2;
}

.course-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 2rem;
    color: var(--text-light);
    font-size: 0.95rem;
}

.course-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.course-meta i {
    color: var(--primary-color);
}

.course-preview {
    background-color: var(--bg-color);
    border-radius: var(--radius-lg);
    padding: 25px;
    box-shadow: var(--shadow);
    position: sticky;
    top: 20px;
}

.course-preview img {
    width: 100%;
    height: auto;
    border-radius: var(--radius);
    margin-bottom: 25px;
}

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

.course-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.enroll-btn {
    width: 100%;
    margin-bottom: 1.5rem;
    padding: 15px 30px;
    font-size: 1.1rem;
}

.preview-meta {
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    margin-top: 1.5rem;
}

.preview-meta-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Course Content Section */
.course-content-section {
    padding: 60px 0;
    background-color: var(--bg-color);
}

.content-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.content-main h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.course-description {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 2.5rem;
}

.course-features {
    list-style: none;
    padding: 0;
    margin-bottom: 2.5rem;
}

.course-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 1rem;
    color: var(--text-light);
    font-size: 1rem;
}

.course-features i {
    color: var(--success-color);
    font-size: 1.1rem;
}

.curriculum-section h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.curriculum-list {
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
}

.curriculum-item {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
}

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

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

.curriculum-item.active {
    background-color: var(--bg-light);
}

/* Instructor Section */
.instructor-section {
    background-color: var(--bg-light);
    padding: 60px 0;
}

.instructor-card {
    background-color: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.instructor-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 20px;
}

.instructor-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.instructor-info h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.instructor-title {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.instructor-info p {
    color: var(--text-light);
    line-height: 1.6;
}

/* Payment and enrollment related styles */
.enroll-btn {
    width: 100%;
    padding: 15px;
    font-size: 1.1em;
    text-align: center;
    margin: 20px 0;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.enroll-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.section-preview {
    padding: 15px;
    background: #f8f9fa;
    border-radius: 5px;
    text-align: center;
    color: #6c757d;
}

.section-preview i {
    margin-right: 8px;
}

.lecture-item {
    display: flex;
    align-items: center;
    padding: 10px 15px;
    border-bottom: 1px solid #eee;
}

.lecture-item i {
    margin-right: 10px;
    color: #3399cc;
}

.lecture-duration {
    margin-left: auto;
    color: #6c757d;
    font-size: 0.9em;
}

/* Course price display */
.course-price {
    font-size: 1.5em;
    font-weight: bold;
    color: #28a745;
    text-align: center;
    margin: 15px 0;
}

/* Enrolled status indicator */
.enrolled-badge {
    background: #28a745;
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9em;
    display: inline-block;
    margin-top: 10px;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .course-header,
    .content-grid {
        padding: 0 20px;
    }
}

@media (max-width: 992px) {
    .course-header,
    .content-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .course-preview {
        position: static;
        max-width: 600px;
        margin: 0 auto;
    }
    
    .course-info {
        padding-right: 0;
        text-align: center;
    }
    
    .course-meta {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .course-hero {
        padding: 40px 0;
    }
    
    .course-info h1 {
        font-size: 2rem;
    }
    
    .course-meta {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .course-price {
        font-size: 2rem;
    }
    
    .instructor-card {
        padding: 20px;
    }
}

@media (max-width: 576px) {
    .course-info h1 {
        font-size: 1.8rem;
    }
    
    .preview-meta {
        font-size: 0.9rem;
    }
}