/*
 * Video Playlist section.
 *
 * An eyebrow, heading, and intro above a two column player: the active
 * episode's 16:9 stage with its title, description, and transcript on the
 * left, and the episode list on the right. On wide screens the list
 * scrolls inside a column no taller than the player; tablets and phones
 * stack the list under the player at full height. Colors are
 * component custom props with light-surface defaults; the purple-surface
 * overrides live in the central page-sections stylesheet under the
 * theme-dark wrapper. The stage itself stays dark on every surface, like
 * the hero video dialog.
 */

.acu-video-playlist {
  --acu-video-playlist-copy: var(--acu-midnight-purple);
  --acu-video-playlist-eyebrow: var(--acu-midnight-purple);
  --acu-video-playlist-heading: var(--acu-wildcat-purple);
  --acu-video-playlist-episode-title: var(--acu-wildcat-purple);
  --acu-video-playlist-muted: rgba(33, 23, 75, 0.72);
  --acu-video-playlist-link: var(--acu-wildcat-purple);
  --acu-video-playlist-link-hover: var(--acu-vibrant-purple);
  --acu-video-playlist-button-border: rgba(33, 23, 75, 0.35);
  --acu-video-playlist-button-surface-hover: rgba(33, 23, 75, 0.08);
  --acu-video-playlist-rule: rgba(33, 23, 75, 0.15);
  --acu-video-playlist-stage-surface: #0d0925;
  --acu-video-playlist-play-surface: var(--acu-white);
  --acu-video-playlist-play-icon: var(--acu-wildcat-purple);
  --acu-video-playlist-item-surface-hover: rgba(33, 23, 75, 0.06);
  --acu-video-playlist-item-surface-current: rgba(33, 23, 75, 0.09);
  --acu-video-playlist-item-marker: var(--acu-horizon-red);
  --acu-video-playlist-item-media-surface: rgba(33, 23, 75, 0.08);
  --acu-video-playlist-count-surface: rgba(33, 23, 75, 0.09);
  --acu-video-playlist-scrollbar: rgba(33, 23, 75, 0.35);
  --acu-video-playlist-transcript-surface: rgba(33, 23, 75, 0.04);
  color: var(--acu-video-playlist-copy);
  padding: clamp(var(--space-3xl), 7.5vw, 7rem) 0;
  width: 100%;
}

.acu-video-playlist__inner {
  margin: 0 auto;
  max-width: var(--container-xl);
  padding: 0 var(--space-xl);
  width: 100%;
}

/* Intro, shared with the other eyebrow + heading sections. */

.acu-video-playlist__intro {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: clamp(var(--space-2xl), 5.5vw, 4rem);
  max-width: 54rem;
}

.acu-video-playlist__eyebrow {
  align-items: center;
  color: var(--acu-video-playlist-eyebrow);
  display: flex;
  font-family: var(--font-serif);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  gap: var(--space-sm);
  letter-spacing: var(--tracking-widest);
  line-height: var(--leading-snug);
  margin: 0;
  text-transform: uppercase;
}

.acu-video-playlist__eyebrow-icon {
  display: block;
  flex: 0 0 auto;
  height: 0.75rem;
  width: 1rem;
}

.acu-video-playlist__heading {
  color: var(--acu-video-playlist-heading);
  font-family: var(--font-serif);
  font-size: clamp(var(--text-4xl), 4.4vw, 3.5rem);
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  margin: 0;
  text-wrap: balance;
}

.acu-video-playlist__description {
  font-family: var(--font-sans);
  font-size: clamp(var(--text-md), 1.6vw, var(--text-xl));
  font-weight: var(--font-regular);
  line-height: var(--leading-normal);
}

.acu-video-playlist__description p {
  margin: 0;
}

.acu-video-playlist__description p + p {
  margin-top: var(--space-sm);
}

/* Player and list columns. */

.acu-video-playlist__layout {
  align-items: start;
  /* The list column measures itself against this width; see the playlist
     max-height rule below. */
  container-type: inline-size;
  display: grid;
  gap: var(--space-2xl);
  grid-template-columns: minmax(0, 2fr) minmax(18rem, 1fr);
}

.acu-video-playlist__layout--single {
  grid-template-columns: minmax(0, 1fr);
  margin: 0 auto;
  max-width: 56rem;
}

.acu-video-playlist__player {
  min-width: 0;
  /* The chosen episode scrolls into view under the sticky site header. */
  scroll-margin-top: 6rem;
}

.acu-video-playlist__episode[hidden] {
  display: none;
}

.acu-video-playlist__stage {
  aspect-ratio: 16 / 9;
  background-color: var(--acu-video-playlist-stage-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  width: 100%;
}

.acu-video-playlist__video {
  background-color: var(--acu-video-playlist-stage-surface);
  display: block;
  height: 100%;
  object-fit: contain;
  width: 100%;
}

.acu-video-playlist__facade {
  height: 100%;
  inset: 0;
  position: absolute;
  width: 100%;
}

.acu-video-playlist__facade-image {
  display: block;
  height: 100%;
  object-fit: cover;
  width: 100%;
}

.acu-video-playlist__iframe {
  border: 0;
  display: block;
  height: 100%;
  inset: 0;
  position: absolute;
  width: 100%;
}

.acu-video-playlist__facade--playing .acu-video-playlist__facade-image,
.acu-video-playlist__facade--playing .acu-video-playlist__play {
  display: none;
}

.acu-video-playlist__noscript {
  bottom: var(--space-md);
  color: var(--acu-white);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  left: var(--space-md);
  margin: 0;
  position: absolute;
}

.acu-video-playlist__noscript a {
  color: inherit;
}

/* The large play control over the stage. Hidden once playback starts;
   the native controls or the YouTube player take over from there. */

.acu-video-playlist__play {
  align-items: center;
  background-color: var(--acu-video-playlist-play-surface);
  border: 0;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
  color: var(--acu-video-playlist-play-icon);
  cursor: pointer;
  display: flex;
  height: 4.5rem;
  justify-content: center;
  left: 50%;
  margin: 0;
  padding: 0;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  transition: transform var(--motion-fast) var(--ease-out);
  width: 4.5rem;
}

.acu-video-playlist__play[hidden] {
  display: none;
}

.acu-video-playlist__play:hover {
  transform: translate(-50%, -50%) scale(1.06);
}

.acu-video-playlist__play:focus-visible {
  outline: 0.1875rem solid var(--acu-sky-blue);
  outline-offset: var(--space-2xs);
}

.acu-video-playlist__play-icon {
  display: block;
  height: 2rem;
  /* The triangle reads centered when it sits a touch right of center. */
  transform: translateX(0.125rem);
  width: 2rem;
}

/* Title, description, and transcript under the stage. */

.acu-video-playlist__details {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.acu-video-playlist__now-playing {
  color: var(--acu-video-playlist-muted);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: var(--tracking-wider);
  line-height: var(--leading-snug);
  margin: 0;
  text-transform: uppercase;
}

.acu-video-playlist__episode-title {
  color: var(--acu-video-playlist-episode-title);
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin: 0;
  overflow-wrap: anywhere;
}

.acu-video-playlist__episode-description {
  font-family: var(--font-sans);
  font-size: var(--text-md);
  line-height: var(--leading-normal);
  max-width: 72ch;
}

.acu-video-playlist__episode-description p {
  margin: 0;
}

.acu-video-playlist__episode-description p + p {
  margin-top: var(--space-sm);
}

/* The optional episode button, such as a study guide, is outlined so it
   never competes with the play control above it. */
.acu-video-playlist__button {
  align-items: center;
  align-self: flex-start;
  background-color: transparent;
  border: 1px solid var(--acu-video-playlist-button-border);
  border-radius: var(--radius-md);
  color: var(--acu-video-playlist-link);
  display: inline-flex;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  justify-content: center;
  line-height: var(--leading-snug);
  margin-top: var(--space-xs);
  min-height: 3rem;
  padding: var(--space-sm) var(--space-lg);
  text-align: center;
  text-decoration: none;
  transition: background-color var(--motion-fast) var(--ease-out);
}

.acu-video-playlist__button:visited {
  color: var(--acu-video-playlist-link);
}

.acu-video-playlist__button:hover,
.acu-video-playlist__button:focus-visible {
  background-color: var(--acu-video-playlist-button-surface-hover);
  color: var(--acu-video-playlist-link);
  text-decoration: none;
}

.acu-video-playlist__button:focus-visible {
  outline: 0.1875rem solid var(--acu-sky-blue);
  outline-offset: var(--space-2xs);
}

.acu-video-playlist__transcript {
  border-top: 1px solid var(--acu-video-playlist-rule);
  margin-top: var(--space-xs);
  padding-top: var(--space-sm);
}

.acu-video-playlist__transcript-summary {
  align-items: center;
  color: var(--acu-video-playlist-link);
  cursor: pointer;
  display: inline-flex;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  gap: var(--space-xs);
  line-height: var(--leading-snug);
  list-style: none;
  min-height: 2.75rem;
  padding: 0;
}

.acu-video-playlist__transcript-summary::-webkit-details-marker {
  display: none;
}

.acu-video-playlist__transcript-summary::before {
  border-right: 0.125rem solid currentColor;
  border-top: 0.125rem solid currentColor;
  content: "";
  flex: none;
  height: 0.5rem;
  transform: rotate(135deg) translate(-0.0625rem, 0.0625rem);
  transition: transform var(--motion-fast) var(--ease-out);
  width: 0.5rem;
}

.acu-video-playlist__transcript[open] > .acu-video-playlist__transcript-summary::before {
  transform: rotate(-45deg) translate(0.0625rem, 0.125rem);
}

.acu-video-playlist__transcript-summary:hover {
  color: var(--acu-video-playlist-link-hover);
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

.acu-video-playlist__transcript-summary:focus-visible {
  outline: 0.1875rem solid var(--acu-sky-blue);
  outline-offset: var(--space-2xs);
}

.acu-video-playlist__transcript-text {
  background-color: var(--acu-video-playlist-transcript-surface);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin: var(--space-xs) 0 var(--space-md);
  max-height: 22rem;
  max-width: 72ch;
  overflow-y: auto;
  padding: var(--space-md);
  scrollbar-color: var(--acu-video-playlist-scrollbar) transparent;
  scrollbar-width: thin;
}

.acu-video-playlist__transcript-text p {
  margin: 0;
}

.acu-video-playlist__transcript-text p + p {
  margin-top: var(--space-sm);
}

.acu-video-playlist__transcript-download {
  align-items: center;
  color: var(--acu-video-playlist-link);
  display: inline-flex;
  flex-wrap: wrap;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  gap: var(--space-xs);
  line-height: var(--leading-snug);
  min-height: 2.75rem;
  text-decoration: none;
}

.acu-video-playlist__transcript-download svg {
  flex: none;
  height: 1rem;
  width: 1rem;
}

.acu-video-playlist__transcript-download small {
  color: var(--acu-video-playlist-muted);
  font-size: var(--text-xs);
  font-weight: var(--font-regular);
}

.acu-video-playlist__transcript-download:hover,
.acu-video-playlist__transcript-download:focus-visible {
  color: var(--acu-video-playlist-link-hover);
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

.acu-video-playlist__transcript-download:focus-visible {
  outline: 0.1875rem solid var(--acu-sky-blue);
  outline-offset: var(--space-2xs);
}

/* The episode list. */

.acu-video-playlist__playlist {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  max-height: 40rem;
  min-height: 0;
  min-width: 0;
  position: relative;
}

/* A fade over the list's last rows shows there is more to scroll to. It
   picks up the section surface, whichever background the section uses. */
.acu-video-playlist__playlist::after {
  background: linear-gradient(
    to bottom,
    transparent,
    var(--acu-ebenezer-section-background-override, var(--acu-ebenezer-section-alternating-background, var(--acu-white)))
  );
  bottom: 0;
  content: "";
  height: 2.5rem;
  left: 0;
  pointer-events: none;
  position: absolute;
  right: var(--space-xs);
  transition: opacity var(--motion-fast) var(--ease-out);
}

/* script.js clears the fade once the list is scrolled to its end, and on a
   list short enough to need no scrolling at all. */
.acu-video-playlist__playlist--at-end::after {
  opacity: 0;
}

/* The list column is as tall as the 16:9 stage beside it, so a long series
   scrolls inside the column instead of running past the player. The stage
   is two thirds of the layout width less the gap, times nine sixteenths.
   The floor keeps a few episodes visible when the stage is short. */
@supports (max-height: 1cqw) {
  .acu-video-playlist__playlist {
    max-height: max(20rem, calc(37.5cqw - (var(--space-2xl) * 0.375)));
  }
}

.acu-video-playlist__playlist-heading {
  align-items: center;
  color: var(--acu-video-playlist-copy);
  display: flex;
  font-family: var(--font-sans);
  font-size: var(--text-md);
  font-weight: var(--font-bold);
  gap: var(--space-xs);
  letter-spacing: 0;
  line-height: var(--leading-snug);
  margin: 0;
  padding: 0 var(--space-sm);
  text-transform: none;
}

.acu-video-playlist__playlist-count {
  background-color: var(--acu-video-playlist-count-surface);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  line-height: 1;
  padding: 0.3rem 0.55rem;
}

.acu-video-playlist__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  list-style: none;
  margin: 0;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior-y: contain;
  padding: 0 var(--space-xs) 0 0;
  scrollbar-color: var(--acu-video-playlist-scrollbar) transparent;
  scrollbar-width: thin;
}

.acu-video-playlist__list-item {
  margin: 0;
}

.acu-video-playlist__item {
  align-items: center;
  background-color: transparent;
  border: 0;
  border-radius: var(--radius-md);
  color: inherit;
  cursor: pointer;
  display: grid;
  font: inherit;
  gap: var(--space-md);
  grid-template-columns: 9rem minmax(0, 1fr);
  margin: 0;
  padding: var(--space-sm);
  position: relative;
  text-align: left;
  transition: background-color var(--motion-fast) var(--ease-out);
  width: 100%;
}

.acu-video-playlist__item:hover {
  background-color: var(--acu-video-playlist-item-surface-hover);
}

.acu-video-playlist__item:focus-visible {
  outline: 0.1875rem solid var(--acu-sky-blue);
  outline-offset: 0.125rem;
}

/* The legacy stylesheet draws the browser focus ring on every focused
   button, so a mouse or touch press would outline the row. Keyboard focus
   keeps the ring above. */
.acu-video-playlist__item:focus:not(:focus-visible),
.acu-video-playlist__play:focus:not(:focus-visible) {
  outline: none;
}

.acu-video-playlist__item[aria-current="true"] {
  background-color: var(--acu-video-playlist-item-surface-current);
}

/* The active episode carries a marker bar on its leading edge. */
.acu-video-playlist__item[aria-current="true"]::before {
  background-color: var(--acu-video-playlist-item-marker);
  border-radius: var(--radius-full);
  bottom: var(--space-sm);
  content: "";
  left: 0;
  position: absolute;
  top: var(--space-sm);
  width: 0.25rem;
}

.acu-video-playlist__item-media {
  aspect-ratio: 16 / 9;
  background-color: var(--acu-video-playlist-item-media-surface);
  border-radius: var(--radius-sm);
  display: block;
  overflow: hidden;
  position: relative;
}

.acu-video-playlist__item-image {
  display: block;
  height: 100%;
  object-fit: cover;
  width: 100%;
}

.acu-video-playlist__item-play {
  align-items: center;
  background-color: var(--acu-video-playlist-play-surface);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  color: var(--acu-video-playlist-play-icon);
  display: flex;
  height: 2rem;
  justify-content: center;
  left: 50%;
  opacity: 0;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  transition: opacity var(--motion-fast) var(--ease-out);
  width: 2rem;
}

.acu-video-playlist__item-play .acu-video-playlist__play-icon {
  height: 1rem;
  transform: translateX(0.0625rem);
  width: 1rem;
}

.acu-video-playlist__item:hover .acu-video-playlist__item-play,
.acu-video-playlist__item:focus-visible .acu-video-playlist__item-play,
.acu-video-playlist__item[aria-current="true"] .acu-video-playlist__item-play {
  opacity: 1;
}

.acu-video-playlist__item-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  min-width: 0;
}

.acu-video-playlist__item-title {
  -webkit-box-orient: vertical;
  display: -webkit-box;
  font-family: var(--font-sans);
  font-size: var(--text-md);
  font-weight: var(--font-semibold);
  -webkit-line-clamp: 2;
  line-height: var(--leading-snug);
  overflow: hidden;
  overflow-wrap: anywhere;
}

.acu-video-playlist__item-duration {
  color: var(--acu-video-playlist-muted);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  line-height: var(--leading-snug);
}

/* Tablets stack the list under the player at its full height. */
@media (max-width: 63.9375rem) {
  .acu-video-playlist__inner {
    padding-inline: var(--space-lg);
  }

  .acu-video-playlist__layout {
    gap: var(--space-xl);
    grid-template-columns: minmax(0, 1fr);
  }

  .acu-video-playlist__playlist {
    max-height: none;
  }

  .acu-video-playlist__playlist::after {
    content: none;
  }

  .acu-video-playlist__list {
    overflow: visible;
    padding-right: 0;
  }
}

@media (max-width: 47.9375rem) {
  .acu-video-playlist {
    padding-block: var(--space-3xl);
  }

  .acu-video-playlist__intro {
    gap: var(--space-sm);
    margin-bottom: var(--space-2xl);
  }

  .acu-video-playlist__heading {
    font-size: var(--text-4xl);
  }

  .acu-video-playlist__description {
    font-size: var(--text-md);
  }

  .acu-video-playlist__layout {
    gap: var(--space-lg);
  }

  .acu-video-playlist__play {
    height: 3.5rem;
    width: 3.5rem;
  }

  .acu-video-playlist__play-icon {
    height: 1.5rem;
    width: 1.5rem;
  }

  .acu-video-playlist__details {
    margin-top: var(--space-md);
  }

  .acu-video-playlist__episode-title {
    font-size: var(--text-xl);
  }

  .acu-video-playlist__item {
    gap: var(--space-sm);
    grid-template-columns: 7.5rem minmax(0, 1fr);
    padding: var(--space-xs);
  }

  .acu-video-playlist__item[aria-current="true"]::before {
    bottom: var(--space-xs);
    top: var(--space-xs);
  }

  .acu-video-playlist__item-title {
    font-size: var(--text-sm);
  }

  .acu-video-playlist__item-duration {
    font-size: var(--text-xs);
  }
}

@media (prefers-reduced-motion: reduce) {
  .acu-video-playlist__play,
  .acu-video-playlist__button,
  .acu-video-playlist__item,
  .acu-video-playlist__item-play,
  .acu-video-playlist__playlist::after,
  .acu-video-playlist__transcript-summary::before {
    transition: none;
  }

  .acu-video-playlist__play:hover {
    transform: translate(-50%, -50%);
  }
}