#activityContainer {
    background-color: #f8f9fa;
    border: 2px solid #6c757d;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    color: #495057;
}
#activityContainer h3 {
    margin: 0;
    font-size: 1.5rem;
}

.header-bar {
    background-color: #8FBC8F;
    color: white;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}
footer {
    background-color: #343a40;
    color: white;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 60px;
    margin-top: 20px;
    border-radius: 8px;
    flex-shrink: 0;
    line-height: 60px;
    height: 60px;
    width: 100%;
}