.investtrack-box {
    border: 2px solid #0073aa;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 8px;
    width: 100%;
    max-width: 800px;
    margin: 20px auto;
    text-align: center;
}
#investtrack-calc-btn {
    background: #0073aa;
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
}
#investtrack-calc-btn:hover {
    background: #005177;
}