/* The inline preview on the home page.
 *
 * Styled entirely through Material's own custom properties so the chrome around
 * the frame follows the docs theme, while the frame itself shows the response
 * page in whichever scheme the switch selects -- the two are deliberately
 * independent, because the point of the switch is to look at the page in a
 * scheme the reader is not currently using.
 */

.rp-embed {
  margin: 1.2rem 0 1.4rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 0.3rem;
  overflow: hidden;
}

.rp-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
  background: var(--md-default-bg-color);
}

.rp-field {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-width: 0;
}

.rp-field > span {
  font-size: 0.55rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--md-default-fg-color--light);
  white-space: nowrap;
}

.rp-field select {
  font: inherit;
  font-size: 0.7rem;
  max-width: 16rem;
  padding: 0.25rem 1.3rem 0.25rem 0.45rem;
  color: var(--md-default-fg-color);
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lighter);
  border-radius: 0.2rem;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.rp-field select:focus-visible {
  outline: 2px solid var(--md-accent-fg-color);
  outline-offset: 1px;
}

/* A CSS caret rather than a background image: it inherits the theme's text
   colour, which a background SVG could not. */
.rp-field::after {
  content: "";
  position: absolute;
  right: 0.5rem;
  top: 50%;
  margin-top: -0.1rem;
  border: 0.22rem solid transparent;
  border-top-color: var(--md-default-fg-color--light);
  pointer-events: none;
}

.rp-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-left: auto;
  cursor: pointer;
  user-select: none;
}

.rp-switch input {
  position: absolute;
  width: 0;
  height: 0;
  opacity: 0;
}

.rp-track {
  position: relative;
  flex: none;
  width: 2rem;
  height: 1.05rem;
  border-radius: 1rem;
  background: var(--md-default-fg-color--lighter);
  transition: background 0.18s ease;
}

.rp-thumb {
  position: absolute;
  top: 0.15rem;
  left: 0.15rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: var(--md-default-bg-color);
  transition: transform 0.18s ease;
}

.rp-switch input:checked + .rp-track {
  background: var(--md-accent-fg-color);
}

.rp-switch input:checked + .rp-track .rp-thumb {
  transform: translateX(0.95rem);
}

.rp-switch input:focus-visible + .rp-track {
  outline: 2px solid var(--md-accent-fg-color);
  outline-offset: 2px;
}

/* The word is generated from the checkbox rather than written by script.
 * Returning to this page re-renders the authored markup while the browser
 * restores the checkbox's own state, so any JS-set text can come back
 * disagreeing with the control it describes. Content tied to :checked cannot.
 */
.rp-switch-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--md-default-fg-color--light);
  /* Fixed width so the bar does not reflow between "Light" and "Dark". */
  min-width: 2.4rem;
}

.rp-switch-label::after {
  content: "Light";
}

.rp-switch input:checked ~ .rp-switch-label::after {
  content: "Dark";
}

.rp-screen {
  background: var(--md-code-bg-color);
}

.rp-embed iframe {
  display: block;
  width: 100%;
  border: 0;
  background: transparent;
}

@media (prefers-reduced-motion: reduce) {
  .rp-track,
  .rp-thumb {
    transition: none;
  }
}