#course-teaser {
    position: fixed;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    background: white;
    border-radius: 1rem;
    padding: 1rem 2rem;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    transition: all 0.6s ease;
    z-index: 9999;
    cursor: pointer;
}

#course-teaser.shrunk {
    top: auto;
    bottom: 20px;
    left: auto;
    right: 20px;
    transform: none;
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    border-radius: 0.75rem;
}

#course-teaser .course-item {
    display: none;
}

#course-teaser .course-item.active {
    display: block;
}

#course-teaser .close-btn {
    position: absolute;
    top: 5px;
    right: 8px;
    border: none;
    background: none;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0.6;
}

#course-teaser .close-btn:hover {
    opacity: 1;
}