@vaadin/vaadin-lumo-styles/src/components/radio-button.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_radio-button {
  :host {
    color: var(--vaadin-radio-button-label-color, var(--lumo-body-text-color));
    font-size: var(--vaadin-radio-button-label-font-size, var(--lumo-font-size-m));
    font-family: var(--lumo-font-family);
    line-height: var(--lumo-line-height-s);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-tap-highlight-color: transparent;
    -webkit-user-select: none;
    user-select: none;
    cursor: default;
    outline: none;
    --_radio-button-size: var(--vaadin-radio-button-size, calc(var(--lumo-size-m) / 2));
    --_focus-ring-color: var(--vaadin-focus-ring-color, var(--lumo-primary-color-50pct));
    --_focus-ring-width: var(--vaadin-focus-ring-width, 2px);
    --_selection-color: var(--vaadin-selection-color, var(--lumo-primary-color));
  }

  :host([has-label]) ::slotted(label) {
    padding: var(
      --vaadin-radio-button-label-padding,
      var(--lumo-space-xs) var(--lumo-space-s) var(--lumo-space-xs) var(--lumo-space-xs)
    );
  }

  [part='radio'] {
    --_input-size: var(--_radio-button-size);
    margin: var(--lumo-space-xs);
    position: relative;
    border-radius: 50%;
    background: var(--vaadin-radio-button-background, var(--lumo-contrast-20pct));
    transition:
      transform 0.2s cubic-bezier(0.12, 0.32, 0.54, 2),
      background-color 0.15s;
    will-change: transform;
    cursor: var(--lumo-clickable-cursor);
    /* Default field border color */
    --_input-border-color: var(--vaadin-input-field-border-color, var(--lumo-contrast-50pct));
  }

  /* Used for activation "halo" */
  [part='radio']::before {
    pointer-events: none;
    color: transparent;
    width: 100%;
    height: 100%;
    border-radius: inherit;
    background-color: inherit;
    transform: scale(1.4);
    opacity: 0;
    transition:
      transform 0.1s,
      opacity 0.8s;
    will-change: transform, opacity;
  }

  /* Used for the dot */
  [part='radio']::after {
    content: '';
    pointer-events: none;
    width: 0;
    height: 0;
    border: var(--vaadin-radio-button-marker-size, 3px) solid
      var(--vaadin-radio-button-dot-color, var(--lumo-primary-contrast-color));
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    transition: 0.25s transform;
    will-change: transform;
    background-clip: content-box;
  }

  :host([checked]) {
    --vaadin-input-field-border-color: transparent;
  }

  :host([checked]) [part='radio'] {
    background-color: var(--_selection-color);
  }

  :host([checked]) [part='radio']::after {
    transform: translate(-50%, -50%) scale(1);
  }

  :host(:not([checked]):not([disabled]):hover) [part='radio'] {
    background: var(--vaadin-radio-button-background-hover, var(--lumo-contrast-30pct));
  }

  :host([active]) [part='radio'] {
    transform: scale(0.9);
    transition-duration: 0.05s;
  }

  :host([active][checked]) [part='radio'] {
    transform: scale(1.1);
  }

  :host([active]:not([checked])) [part='radio']::before {
    transition-duration: 0.01s, 0.01s;
    transform: scale(0);
    opacity: 0.4;
  }

  :host([focus-ring]) [part='radio'] {
    box-shadow:
      0 0 0 1px var(--lumo-base-color),
      0 0 0 calc(var(--_focus-ring-width) + 1px) var(--_focus-ring-color),
      inset 0 0 0 var(--_input-border-width, 0) var(--_input-border-color);
  }

  :host([disabled]) {
    pointer-events: none;
    color: var(--lumo-disabled-text-color);
    --vaadin-input-field-border-color: var(--lumo-contrast-20pct);
  }

  :host([disabled]) ::slotted(label) {
    color: inherit;
  }

  :host([disabled]) [part='radio'] {
    background-color: var(--vaadin-radio-button-disabled-background, var(--lumo-contrast-10pct));
  }

  :host([disabled]) [part='radio']::after {
    border-color: var(--vaadin-radio-button-disabled-dot-color, var(--lumo-contrast-30pct));
  }

  /* RTL specific styles */
  :host([dir='rtl'][has-label]) ::slotted(label) {
    padding: var(--lumo-space-xs) var(--lumo-space-xs) var(--lumo-space-xs) var(--lumo-space-s);
  }

  @media (forced-colors: active) {
    [part='radio'] {
      outline: 1px solid;
      outline-offset: -1px;
    }

    :host([focused]) [part='radio'] {
      outline-width: 2px;
    }

    :host([disabled]) [part='radio'] {
      outline-color: GrayText;
    }
  }
}