/* Container & Global Structure */
.acme-lms-curriculum {
    border: 1px solid #d1d7dc;
    background: #fff;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 20px 0;
}

/* Section Header */
.acme-curriculum-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background-color: #f7f9fa;
    border-bottom: 1px solid #d1d7dc;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.acme-curriculum-header:hover {
    background-color: #f1f3f4;
    /* Subtle darken on hover */
    /* Strict Requirement: No transform or movement */
}

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

.acme-section-title {
    margin: 0;
    font-size: 16px;
    font-weight: 700;
    color: #2d2f31;
}

.acme-chevron {
    color: #2d2f31 !important;
    font-size: 18px !important;
    transition: transform 0.2s ease !important;
    /* Rotation animation only */
    display: block !important;
}

.acme-chevron.rotated {
    transform: rotate(180deg) !important;
}

.acme-section-meta {
    font-size: 14px;
    color: #6a6f73;
}

/* Section Body & Lesson Rows */
.acme-curriculum-body {
    display: none;
    /* Hidden by default */
}

.acme-lesson-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px 12px 48px;
    border-bottom: 1px solid #f7f9fa;
    background: #fff;
}

.acme-lesson-row:last-child {
    border-bottom: 0;
}

.acme-lesson-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.acme-lesson-icon {
    font-size: 16px !important;
    color: #6a6f73 !important;
}

.acme-lesson-title {
    font-size: 14px;
    color: #2d2f31;
}

.acme-lesson-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.acme-preview-link {
    font-size: 14px;
    color: #5624d0;
    /* Udemy Brand color */
    text-decoration: underline;
    font-weight: 600;
}

.acme-preview-link:hover {
    color: #401b9c;
}

.acme-lesson-duration {
    font-size: 14px;
    color: #6a6f73;
    min-width: 45px;
    text-align: right;
}