@vaadin/vaadin-lumo-styles/src/components/date-picker-overlay-content.css

Lumo is a design system foundation for modern web applications, used by Vaadin components

/**
 * @license
 * Copyright (c) 2017 - 2026 Vaadin Ltd.
 * This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
 */
@media lumo_components_date-picker-overlay-content {
  :host {
    /* Background for the year scroller, placed here as we are using a mask image on the actual years part */
    background-image: linear-gradient(var(--lumo-shade-5pct), var(--lumo-shade-5pct));
    background-size: 57px 100%;
    background-position: top right;
    background-repeat: no-repeat;
    cursor: default;
  }

  :host([dir='rtl']) {
    background-position: top left;
  }

  ::slotted([slot='months']) {
    /* Month calendar height:
          header height + margin-bottom
        + weekdays height + margin-bottom
        + date cell heights
        + small margin between month calendars
    */
    /* prettier-ignore */
    --vaadin-infinite-scroller-item-height:
      calc(
          var(--lumo-font-size-l) + var(--lumo-space-m)
        + var(--lumo-font-size-xs) + var(--lumo-space-s)
        + var(--lumo-size-m) * 6
        + var(--lumo-space-s)
      );
    --vaadin-infinite-scroller-buffer-offset: 10%;
    mask-image: linear-gradient(transparent, #000 10%, #000 85%, transparent);
  }

  ::slotted([slot='years']) {
    /* TODO get rid of fixed magic number */
    --vaadin-infinite-scroller-buffer-width: 57px;
    width: 57px;
    font-size: var(--lumo-font-size-s);
    border: none;
    background: transparent;
    box-shadow: inset 2px 0 4px 0 var(--lumo-shade-5pct);
    mask-image: linear-gradient(transparent, #000 35%, #000 65%, transparent);
    cursor: var(--lumo-clickable-cursor);
  }

  :host([dir='rtl']) ::slotted([slot='years']) {
    box-shadow: inset -2px 0 4px 0 var(--lumo-shade-5pct);
  }

  ::slotted([slot='years']:hover) {
    --_lumo-date-picker-year-opacity: 1;
  }

  /* Year scroller position indicator */
  ::slotted([slot='years'])::before {
    border: none;
    width: 1em;
    height: 1em;
    background-color: var(--lumo-base-color);
    background-image: linear-gradient(var(--lumo-tint-5pct), var(--lumo-tint-5pct));
    border-top-right-radius: var(--lumo-border-radius-s);
    box-shadow: 2px -2px 6px 0 var(--lumo-shade-5pct);
    translate: -75% -50%;
  }

  :host([dir='rtl']) ::slotted([slot='years'])::before {
    border-bottom-left-radius: var(--lumo-border-radius-s);
    translate: 75% -50%;
  }

  [part='toolbar'] {
    padding: var(--lumo-space-s);
    border-bottom-left-radius: var(--lumo-border-radius-l);
  }

  /* Narrow viewport mode (fullscreen) */

  :host([fullscreen]) [part='toolbar'] {
    margin-inline-end: 57px;
    background-color: var(--lumo-base-color);
    border: none;
  }

  [part='toolbar'] ::slotted(vaadin-button) {
    margin: 0;
  }

  /* Very narrow screen (year scroller initially hidden) */

  [part='years-toggle-button'] {
    height: var(--lumo-size-m);
    padding: 0 0.5em;
    border-radius: var(--lumo-border-radius-m);
    color: var(--lumo-primary-text-color);
    font-weight: 500;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  :host([years-visible]) [part='years-toggle-button'] {
    background-color: var(--lumo-primary-color);
    color: var(--lumo-primary-contrast-color);
  }

  /* TODO magic number (same as used for media-query in vaadin-date-picker-overlay-content) */
  @media screen and (max-width: 374px) {
    :host {
      background-image: none;
    }

    :host([fullscreen]) [part='toolbar'] {
      margin-inline-end: 0;
    }

    /* TODO make date-picker adapt to the width of the years part */
    ::slotted([slot='years']) {
      --vaadin-infinite-scroller-buffer-width: 50px;
      width: 50px;
      background-color: var(--lumo-shade-5pct);
    }
  }
}