.column-left-button {
    background-color: rgba(0, 153, 255, 0.1);
    margin-bottom: 2px;
    color: white;
    padding: 10px 20px;
    font-size: 14px;
    border-radius: 0;
    cursor: pointer;
    box-shadow: inset 0 0 20px rgba(0, 153, 255, 0.6), inset 0 0 40px rgba(0, 153, 255, 0.6);
    border: 1px solid transparent;
    border-image: linear-gradient(45deg, #99CCFF, #3399FF, #0099FF, #6699CC, #336699, #006699) 1;
    transition: all 0.3s ease;
    width: 100%;
}

.column-left-button.last {
    margin-bottom: 15px;
}

.column-left-button:hover {
    background-color: rgba(0, 153, 255, 0.2);
}