.memo-card {
    padding-inline-start: 5px;
    padding-inline-end: 5px;
    padding-block-start: 5px;
    padding-block-end: 5px;
}

.navbar-toggler span::before {   
  content: "▴";
  font-size: larger;
  vertical-align: sub;
}

.navbar-toggler.collapsed span::before {   
  content: "▾";
  font-size: larger;
  vertical-align: sub;
}