body {
    color: #545454;
}

#course-details {
    padding: 8vw 8vw 0 8vw;
}

.course-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin: 50px 0;

}

.course-header .course-info {
    flex: 1;
    padding-right: 50px;
}

.course-header .course-info h1 {
    color: #424067;
    margin-bottom: 20px;
    font-size: 2.5rem;
}

.course-header .course-info .star {
    color: #fdc93b;
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.course-header .course-image {
    flex: 1;
}

.course-header .course-image img {
    width: 100%;
    height: 300px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.course-details-section {
    display: flex;
    margin-bottom: 40px;
}

.course-details-content {
    flex: 2;
    padding-right: 50px;
}

.course-sidebar {
    flex: 1;
    background-color: #f9f9ff;
    padding: 30px;
    border-radius: 10px;
}

.course-details-content h2,
.course-sidebar h3 {
    color: #424067;
    margin-bottom: 20px;
}

.course-details-content p,
.course-sidebar p {
    margin-bottom: 20px;
    line-height: 1.6;
}

.course-sidebar .price {
    font-size: 2rem;
    color: #424067;
    font-weight: 600;
    margin-bottom: 20px;
}

.course-sidebar .enroll-btn {
    display: block;
    width: 100%;
    padding: 15px;
    background-color: #424067;
    color: white;
    text-align: center;
    text-decoration: none;
    border-radius: 25px;
    transition: 0.3s ease;
}

.course-sidebar .enroll-btn:hover {
    background-color: #a138ef;
}

.curriculum-list {
    list-style-type: none;
}

.curriculum-list li {
    background-color: #f9f9ff;
    margin-bottom: 10px;
    padding: 15px;
    border-radius: 5px;
    display: flex;
    align-items: center;
}

.curriculum-list li i {
    margin-right: 15px;
    color: #424067;
}

@media (max-width: 769px) {
    .course-header,
    .course-details-section {
        flex-direction: column;
    }

    .course-header .course-info,
    .course-details-content {
        padding-right: 0;
        margin-bottom: 30px;
    }

    .course-header h1 {
        font-size: 2rem;
    }
    nav .navigation ul.active {
        right: 0px;
      }
}