pleroma-fe/src/components/settings_modal/settings_modal.scss

@import 'src/_variables.scss';
.settings-modal {
  overflow: hidden;

  &.peek {
    .modal-panel {
      /* Explanation:
       * Modal is positioned vertically centered.
       * 100vh - 100% = Distance between modal's top+bottom boundaries and screen
       * (100vh - 100%) / 2 = Distance between bottom (or top) boundary and screen
       * + 100% - we move modal completely off-screen, it's top boundary touches
       *   bottom of the screen
       * - 50px - leaving tiny amount of space so that titlebar + tiny amount of modal is visible
       */
      transform: translateY(calc(((100vh - 100%) / 2 + 100%) - 50px));
    }
  }
}