button, select, option {
    background-color: #f0f0f0;
    color: #333;
    border: 1px solid #ccc;
    padding: 0px 2px;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
}

.month-btn {
    padding: 2px 8px;
    margin: 0 10px;
}