Checkmate/Client/src/Components/Sidebar/index.css

aside .MuiList-root svg {
  width: 20px;
  height: 20px;
  opacity: 0.9;
}
aside span.MuiTypography-root {
  font-size: var(--env-var-font-size-medium);
  line-height: 1;
}
aside .MuiStack-root + span.MuiTypography-root {
  font-size: var(--env-var-font-size-medium-plus);
}
aside .MuiListSubheader-root {
  font-size: var(--env-var-font-size-small);
  font-weight: 500;
  line-height: 1.5;
  text-transform: uppercase;
  margin-bottom: 2px;
  opacity: 0.6;
}
aside p.MuiTypography-root {
  font-size: var(--env-var-font-size-small);
  opacity: 0.8;
}
aside .MuiListItemButton-root:not(.selected-path) > * {
  opacity: 0.9;
}
aside .selected-path > * {
  opacity: 1;
}
aside .selected-path span.MuiTypography-root {
  font-weight: 600;
}
aside .MuiCollapse-wrapperInner .MuiList-root > .MuiListItemButton-root {
  position: relative;
}
aside .MuiCollapse-wrapperInner .MuiList-root svg,
aside .MuiList-root .MuiListItemText-root + svg {
  width: 18px;
  height: 18px;
}

.sidebar-popup li.MuiButtonBase-root:has(.MuiBox-root) {
  padding-bottom: 0;
}
.sidebar-popup svg {
  width: 16px;
  height: 16px;
  opacity: 0.9;
}

/* TRANSITIONS */
aside {
  flex: 1;
  transition: max-width 650ms cubic-bezier(0.36, -0.01, 0, 0.77);
}
.home-layout aside.collapsed {
  max-width: 64px;
}

aside.expanded .MuiTypography-root,
aside.expanded p.MuiTypography-root,
aside.expanded .MuiListItemText-root + svg,
aside.expanded .MuiAvatar-root + .MuiBox-root + .MuiIconButton-root {
  visibility: visible;
  animation: fadeIn 1s ease;
}

aside.collapsed .MuiTypography-root,
aside.collapsed p.MuiTypography-root,
aside.collapsed .MuiListItemText-root + svg,
aside.collapsed .MuiAvatar-root + .MuiBox-root + .MuiIconButton-root {
  opacity: 0;
  visibility: hidden;
}

aside .MuiListSubheader-root {
  transition: padding 200ms ease;
}

@keyframes fadeIn {
  0% {
    opacity: 0;
    visibility: hidden;
  }
  30% {
    opacity: 0;
    visibility: hidden;
  }
  100% {
    opacity: 0.9;
    visibility: visible;
  }
}