styles.css

body {
  padding-top: 80px;
}

.container {
  display: flex;
}

.navigation-menu {
  width: 120px;
  position: fixed;
}

.components-container {
  padding-left: 150px;
  padding-bottom: 40px;
  flex-grow: 1;
}

.component-header {
  display: block;
}

.component-header {
  margin-bottom: 24px;
}

.component-header:not(:first-child) {
  margin-top: 48px;
}

.component-example + .component-example {
  margin-top: 20px;
}

.component-example .card {
  margin-bottom: 20px;
}

.component-example .modal {
  display: block;

  position: relative;
  top: auto;
  right: auto;
  left: auto;
  bottom: auto;
  z-index: 1;
  overflow: visible;
}

.component-example .modal-dialog {
  width: 90%;
  margin: 5px;
}

.component-example .popover {
  position: relative;
  display: inline-block;
  width: 220px;
  margin: 20px
}

@media (max-width: 991px) {
  .navigation-menu {
    display: none;
  }

  .components-container {
    padding-left: 0;
  }
}