.course-accordion {
    max-width: auto;
    margin: 0 auto;
    background: white;
}

.accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px;
    margin-bottom: 14px;
    cursor: pointer;
    background: white;
    transition: background-color 0.3s ease;
    user-select: none;
    box-shadow: rgba(0,0,0,0.14) 0px 1px 6px 0px;
    border-radius: 5px;
}

.accordion-header:hover {
    background: #f9f9f9;
}

.accordion-header-left {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
}

.accordion-icon {
    width: 24px;
    height: 24px;
    padding: 5px;
    background-color: #F1F5EF;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

.accordion-icon svg {
    width: 16px;
    height: 16px;
    fill: #333;
}

.accordion-title h3 {
    font-family: "Georgia", serif;
    font-size: 22px;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: -1px;
    color: #124a38;
    margin: 0;
}

.accordion-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    color: #666;
    font-size: 13px;
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.accordion-section.active .accordion-content {
    max-height: 2000px;
}

.lecture-list {
    padding: 10px;
}

.lecture-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: #F5F5F5;
    padding: 10px;
    margin-bottom: 10px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.lecture-item:last-of-type {
    margin-bottom: 0;
}

.lecture-item:hover {
    background: #f0f0f0;
    border-left-color: #4CAF50;
}

.lecture-item-left {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
}

.lecture-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background-color: #C5C5C5;
    border-radius: 50%;
}

.lecture-icon svg {
    width: 14px;
    height: 14px;
    fill: #fff;
}

.lecture-name {
    font-family: "Georgia", serif;
    font-size: 16px;
    font-weight: 400;
    color: #111111;
}

.lecture-duration {
    font-size: 12px;
    color: #999;
    white-space: nowrap;
}