body {
    /*background-color: #efecf7;*/
    background-color: white;
    font-size: 1em;
    color: #4a4a4a;
    font-family: BlinkMacSystemFont, -apple-system, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", "Helvetica", "Arial", sans-serif;
    /* font-size: 3rem; */
    font-weight: 400;
    line-height: 1.5;
}

.header {
    background-color: #3951b5;
    color: #f8f8f8;
    margin-top: 0;
    box-shadow: 0 2px 2px 0 rgba(0,0,0,0.14), 0 3px 1px -2px rgba(0,0,0,0.12);
    font-weight: 400;
    padding: 3px 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    top: 0;
    width: 100%;
}

.content {
    margin: 20px 10px;
    padding-top: 5em;
}
.button {
    display: block;
    padding: 6px;
    margin-top: 5px;
    color: white;
    text-decoration: none;
    vertical-align: center;
    /*box-shadow: 0 2px 2px 0 rgba(0,0,0,0.14), 0 3px 1px -2px rgba(0,0,0,0.12), 0 1px 5px 0 rgba(0,0,0,0.2);*/
    border-radius: 2px;
    font-weight: 400;
    font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",sans-serif;
    max-width: 600px;
}

.lessonButton {
    /*background-color: #586bc3;*/
    background-color: white;
    color:black;
}

.worksheetButton {
    background-color: #4CAF50; /* Green */
}

.worksheetButton.past {
    background-color: #f7e3e3; /* Green */
    color:black;
}








/* start of accordion */
/* Style the buttons that are used to open and close the accordion panel */
.accordion {
    background-color: #eee;
    color: #444;
    cursor: pointer;
    padding: 18px;
    width: 100%;
    text-align: left;
    border: none;
    outline: none;
    transition: 0.4s;
}

/* Add a background color to the button if it is clicked on (add the .active class with JS), and when you move the mouse over it (hover) */
.active, .accordion:hover {
    background-color: #ccc;
}

/* Style the accordion panel. Note: hidden by default */
.panel {
    padding: 0 18px;
    background-color: white;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease-out;
}
/* end of accordion */