.subject-button-box h3 {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 8px;
    background-color: #ffffff;
    margin: 6px 6px;
    transition: 0.3s;
    font-size: 17px;
    width: 100%;
    text-align: center;
    height: 65px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.subject-button-box h3:hover {
    background-color: #f8f9fa;
    border-color: #999;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    cursor: pointer;
}