body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #121212;
    color: #e0e0e0;
}

#select-section {
    display: block;
}

.select-lang {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #121212;
    color: #e0e0e0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.language-buttons {
    display: flex;
    gap: 20px;
}

.language-buttons button {
    padding: 15px 30px;
    font-size: 18px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background-color: #28a745;
    color: white;
}

.language-buttons button:hover {
    background-color: #218838;
}

.copyright {
    position: absolute;
    bottom: 20px;
    text-align: center;
    font-size: 14px;
    color: #888;
}

#english-course-section,
#somali-course-section {
    display: none;
}

.container {
    display: flex;
    gap: 20px;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.left-side {
    flex: 3;
    background-color: #1e1e1e;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.video-container {
    margin-top: 20px;
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 10px;
}

.modules-list {
    margin-top: 20px;
}

.module-item {
    padding: 10px;
    margin: 5px 0;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
    border: 1px solid #333;
}

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

.module-item .module-header span {
    font-size: 16px;
    font-weight: bold;
}

.module-item .module-header button {
    background: none;
    border: none;
    font-size: 16px;
    cursor: pointer;
    color: #e0e0e0;
}

.submodules-list {
    margin-left: 20px;
    margin-top: 10px;
    display: none; /* Hidden by default */
}

.submodule-item {
    padding: 8px;
    margin: 3px 0;
    border: 1px solid #333;
    border-radius: 4px;
    background-color: #2a2a2a;
    color: #e0e0e0;
}

.submodule-item.unlocked {
    background-color: #1c3d5a;
    color: #64b5f6;
}

.submodule-item.completed {
    background-color: #2e7d32;
    color: #e8f5e9;
}

.course-copyright {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
    color: #888;
}

.back-button {
    margin-top: 20px;
    text-align: center;
}

.back-button button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background-color: #28a745;
    color: white;
}

.back-button button:hover {
    background-color: #218838;
}