phone_app/app/assets/stylesheets/3-components/_sidebar.scss

.sidebar {
  min-width: $sidebar-width;
  max-width: $sidebar-width;
  transition: $sidebar-transition;
  background: $sidebar-bg;
  border-right: $sidebar-border;
  box-shadow: $sidebar-shadow;
  z-index: 1;
}

.sidebar-brand,
.sidebar-brand:hover {
  padding: $sidebar-brand-padding;
  background: $sidebar-brand-bg;
  font-size: $sidebar-brand-font-size;
  font-weight: $sidebar-brand-font-weight;
  color: $sidebar-brand-color;
  width: 100%;
  display: block;
  text-decoration: none;

  svg {
    height: 32px;
    width: 32px;
    margin-right: .25rem;
    fill: $sidebar-brand-icon-color;
  }
}

.sidebar-user {
  padding: $sidebar-user-padding;
  background: $sidebar-user-background;
  color: $sidebar-user-color;
  text-align: center;

  img {
    width: 64px;
    height: 64px;
  }
}

.sidebar-content {
  background: $sidebar-content-bg;
  transition: $sidebar-transition;
  height: 100%;
  min-height: 100%;
	display: flex;
  flex-direction: column;
}

.sidebar-nav {
  margin-bottom: 0;
  padding-left: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  flex: 1;
  background: $sidebar-nav-background;
}

// Sidebar links
.sidebar-link,
a.sidebar-link {
  display: block;
  padding: $sidebar-link-padding;
  margin: $sidebar-link-margin;
  color: $sidebar-link-color;
  font-weight: $sidebar-link-font-weight;
  background: $sidebar-link-bg;
  border-radius: $sidebar-link-border-radius;
  transition: background .1s ease-in-out;
  position: relative;
  text-decoration: none;
  cursor: pointer;

  svg,
  .fas,
  .far,
  .fal,
  .fab {
    margin-right: .75rem;
    color: $sidebar-link-icon-color;
  }
}

.sidebar-link:focus {
  outline: 0;
}

.sidebar-link:hover {
  color: $sidebar-link-hover-color;
  background: $sidebar-link-hover-bg;

  svg,
  .fas,
  .far,
  .fal,
  .fab {
    color: $sidebar-link-icon-hover-color;
  }
}

.sidebar-item.active > .sidebar-link,
.sidebar-item.active .sidebar-link:hover {
  color: $sidebar-link-active-color;
  background: $sidebar-link-active-bg;

  svg,
  .fas,
  .far,
  .fal,
  .fab {
    color: $sidebar-link-icon-active-color;
  }
}

// Children
.sidebar-dropdown .sidebar-link {
  padding: $sidebar-link-child-padding;
  margin: $sidebar-link-child-margin;
  color: $sidebar-link-child-color;
  background: $sidebar-link-child-bg;
  font-weight: $sidebar-link-child-font-weight;
  font-size: $sidebar-link-child-font-size;
}

.sidebar-dropdown .sidebar-item .sidebar-link:hover {
  color: $sidebar-link-child-hover-color;
  background: $sidebar-link-child-hover-bg;
  font-weight: $sidebar-link-hover-font-weight;
}

.sidebar-dropdown .sidebar-item.active .sidebar-link {
  color: $sidebar-link-child-active-color;
  background: $sidebar-link-child-active-bg;
  font-weight: $sidebar-link-active-font-weight;
}

// Chevron
.sidebar [data-toggle="collapse"] {
  position: relative;
}

.sidebar [data-toggle="collapse"]:before {
  content: " ";
  border: solid;
  border-width: 0 .1rem .1rem 0;
  display: inline-block;
  padding: 2.5px;
  transform: rotate(-45deg);
  position: absolute;
  top: 1.2rem;
  right: 1.25rem;
  transition: all .2s ease-out;
}

.sidebar [aria-expanded="true"]:before,
.sidebar [data-toggle="collapse"]:not(.collapsed):before {
  transform: rotate(45deg);
}

// Toggle states
.sidebar-toggle {
  cursor: pointer;
  width: 26px;
  height: 26px;
  margin-left: $spacer*0.5;
}

.sidebar {
  &.toggled {
    margin-left: -$sidebar-width;

    .sidebar-content {
      left: -$sidebar-width;
    }
  }

  // Workaround for IE bug, more info:
  // https://stackoverflow.com/a/25850649
  @media (min-width: 1px) and (max-width: #{map-get($grid-breakpoints, 'lg') - .02px}) {

    // Sidebar default state (on mobile)
    margin-left: -$sidebar-width;

    .sidebar-content {
      left: -$sidebar-width;
    }

    // Sidebar toggled state (on mobile)
    &.toggled {
      margin-left: 0;

      .sidebar-content {
        left: 0;
      }
    }

    // Sidebar collapsed state (on mobile)
    // layouts-sidebar-collapsed.html
    &-collapsed {
      margin-left: 0;

      .sidebar-content {
        left: 0;
      }

      &.toggled {
        margin-left: -$sidebar-width;

        .sidebar-content {
          left: -$sidebar-width;
        }
      }
    }
  }
}

// Sidebar header
.sidebar-header {
  background: transparent;
  color: $sidebar-header-color;
  padding: $sidebar-header-padding;
  font-size: $sidebar-header-font-size;
  font-weight: $sidebar-header-font-weight;
  text-transform: $sidebar-header-text-transform;
}

// Badge
.sidebar-badge {
  position: absolute;
  right: 15px;
  top: 13px;

  .sidebar-dropdown & {
    top: 7px;
  }
}

// Sidebar right
.sidebar-right {
  &.toggled {
    margin-left: auto;
    margin-right: -$sidebar-width;

    .sidebar-content {
      left: auto;
      right: -$sidebar-width;
    }
  }

  // Workaround for IE bug, more info:
  // https://stackoverflow.com/a/25850649
  @media (min-width: 1px) and (max-width: #{map-get($grid-breakpoints, 'lg') - .02px}) {

    // Sidebar default state (on mobile)
    margin-left: auto;
    margin-right: -$sidebar-width;

    .sidebar-content {
      left: auto;
      right: -$sidebar-width;
    }

    // Sidebar toggled state (on mobile)
    &.toggled {
      margin-left: auto;
      margin-right: 0;

      .sidebar-content {
        left: auto;
        right: 0;
      }
    }

    // Sidebar collapsed state (on mobile)
    // layouts-sidebar-collapsed.html
    &-collapsed {
      margin-left: auto;
      margin-right: 0;

      .sidebar-content {
        left: auto;
        right: 0;
      }

      &.toggled {
        margin-left: auto;
        margin-right: -$sidebar-width;

        .sidebar-content {
          left: auto;
          right: -$sidebar-width;
        }
      }
    }
  }
}