body {
    margin: 0 auto;
}

.index {
    color: white;
    text-decoration: none;
}

.mdc-card {
    margin: 1rem;
}

.mdc-layout-grid__cell {
    text-align: center;
    margin: 0 auto;
    width: 650px;
}

.collapsible:after {
    content: "\0002B"; /* Unicode character for "plus" sign (+) */
    font-size: 13px;
    color: white;
    float: right;
    margin-left: 5px;
}
  
.active:after {
    content: "\2212"; /* Unicode character for "minus" sign (-) */
}

.content {
    padding: 0 18px;
    background-color: white;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease-out;
}

:root {
    --mdc-theme-primary: black;
    --mdc-theme-secondary: black;
}