.side-panel {
  /* Public API (customizable component options) */
  --_op-side-panel-width: calc(54 * var(--op-size-unit)); /* 216px */
  --_op-side-panel-header-padding: var(--op-space-medium);
  --_op-side-panel-body-padding: var(--op-space-medium);
  --_op-side-panel-footer-padding: var(--op-space-medium);
  --_op-side-panel-section-padding: var(--op-space-medium);

  display: flex;
  width: var(--_op-side-panel-width);
  min-width: var(--_op-side-panel-width);
  height: 100vh;
  max-height: 100%;
  flex-direction: column;
  background-color: var(--op-color-background);
  color: var(--op-color-on-background);

  /* Modifiers */
  &.side-panel--border-left {
    box-shadow: var(--op-border-left) var(--op-color-border);
  }

  &.side-panel--border-right {
    box-shadow: var(--op-border-right) var(--op-color-border);
  }

  &.side-panel--border-left.side-panel--border-right {
    box-shadow: var(--op-border-x);
  }

  /* Elements */
  .side-panel__header {
    &.side-panel__header--padded {
      padding: var(--_op-side-panel-header-padding);
    }

    &.side-panel__header--padded-x {
      padding-inline: var(--_op-side-panel-header-padding);
    }

    &.side-panel__header--padded-y {
      padding-block: var(--_op-side-panel-header-padding);
    }
  }

  .side-panel__body {
    flex: 1;
    overflow-y: auto;

    &.side-panel__body--padded {
      padding: var(--_op-side-panel-body-padding);
    }

    &.side-panel__body--padded-x {
      padding-inline: var(--_op-side-panel-body-padding);
    }

    &.side-panel__body--padded-y {
      padding-block: var(--_op-side-panel-body-padding);
    }
  }

  .side-panel__footer {
    &.side-panel__footer--padded {
      padding: var(--_op-side-panel-footer-padding);
    }

    &.side-panel__footer--padded-x {
      padding-inline: var(--_op-side-panel-footer-padding);
    }

    &.side-panel__footer--padded-y {
      padding-block: var(--_op-side-panel-footer-padding);
    }
  }

  .side-panel__section {
    &.side-panel__section--padded {
      padding: var(--_op-side-panel-section-padding);
    }

    &.side-panel__section--padded-x {
      padding-inline: var(--_op-side-panel-section-padding);
    }

    &.side-panel__section--padded-y {
      padding-block: var(--_op-side-panel-section-padding);
    }
  }
}