/* ========================================
   BE Course Sidebar - Fallback CSS
   ======================================== */
.be-course-sidebar {
    width: 100%;
    font-family: system-ui, sans-serif;
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 0;
}

.be-course-sidebar .module {
    margin-bottom: 5px;
}

.be-course-sidebar .module-title {
    padding: 10px 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #f3f3f6;
    color: #000;
    font-weight: 600;
    border-bottom: 1px solid #ddd;
}

.be-course-sidebar .module-title:hover {
    background: #ededf1;
}

.be-course-sidebar .module-title.active {
    background: #dcdce1;
}

.be-course-sidebar .module-content {
    display: none; /* collapsed by default */
    padding-left: 0;
}

.be-course-sidebar .module-content.active {
    display: block; /* fallback for active module */
}

.be-course-sidebar .chapter {
    margin-left: 10px;
    margin-bottom: 3px;
}

.be-course-sidebar .chapter-title {
    padding: 8px 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #f7f7f9;
    color: #000;
    font-weight: 500;
    border-bottom: 1px solid #eee;
}

.be-course-sidebar .chapter-title:hover {
    background: #ececee;
}

.be-course-sidebar .chapter-title.active {
    background: #dcdce1;
}

.be-course-sidebar .chapter-content {
    display: none; /* collapsed by default */
    padding-left: 15px;
}

.be-course-sidebar .chapter-content.active {
    display: block; /* fallback for active chapter */
}

.be-course-sidebar .lesson-list {
    list-style: none;
    padding-left: 0;
    margin: 0 0 5px 0;
}

.be-course-sidebar .lesson-list li {
    padding: 5px 0;
}

.be-course-sidebar .lesson-list li a {
    color: #333;
    text-decoration: none;
    display: block;
    padding-left: 5px;
}

.be-course-sidebar .lesson-list li a:hover {
    color: #000;
}

.be-course-sidebar .lesson-list li.active a {
    color: #f15c22;
    font-weight: 600;
}

.be-course-sidebar .arrow {
    margin-left: auto;
    font-size: 12px;
    transition: transform 0.2s;
}