/* Module 31 — Short Videos rail + fullscreen player */

.m31-shorts-wrap {
  --m31-gap: 0.65rem;
  --m31-radius: 0.85rem;
  --m31-accent: #f5d547;
  --m31-play-bg: rgba(255, 255, 255, 0.94);
  --m31-play-fg: #1a1a1a;
  --m31-nav: rgba(255, 255, 255, 0.55);
  /* هم‌تراز با .section_book .card__content */
  --m31-inline: 1.75rem;
  padding-inline: 0;
}

@media (max-width: 767.98px) {
  .m31-shorts-wrap {
    --m31-inline: 0.5rem;
  }
}

.m31-shorts__heading-title {
  margin-top: 0.5rem !important;
  width: 100%;
}

.m31-shorts__heading-title.text-xl-start,
.m31-shorts__heading-desc {
  text-align: inherit;
}

@media (min-width: 1200px) {
  .m31-shorts__heading-title {
    text-align: start !important;
    justify-content: flex-start !important;
  }

  .m31-shorts__heading-desc {
    text-align: start;
    padding-inline: 0;
  }
}

.m31-shorts__heading-desc {
  color: var(--text-color, #6c757d);
  font-size: 0.9rem;
  line-height: 1.6;
  text-align: center;
  margin-inline: var(--m31-inline);
}

.m31-shorts {
  position: relative;
  width: 100%;
}

.m31-shorts__rail {
  position: relative;
  overflow: hidden;
  /* هم‌راستا با کارت‌های خلاصه کتاب (section_book) */
  margin-inline: var(--m31-inline);
  padding-inline: 0;
}

.m31-shorts__slide {
  width: 42vw;
  max-width: 168px;
  height: auto;
}

@media (min-width: 576px) {
  .m31-shorts__slide {
    width: 38vw;
    max-width: 180px;
  }
}

@media (min-width: 768px) {
  .m31-shorts__slide {
    width: 168px;
    max-width: none;
  }
}

@media (min-width: 992px) {
  .m31-shorts__slide {
    width: 186px;
  }
}

@media (min-width: 1200px) {
  .m31-shorts__slide {
    width: 200px;
  }
}

.m31-shorts__card {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  border-radius: var(--m31-radius);
  overflow: hidden;
  cursor: pointer;
  background: #111;
  aspect-ratio: 9 / 16;
  text-align: right;
  color: #fff;
  -webkit-tap-highlight-color: transparent;
  isolation: isolate;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s ease;
  will-change: transform;
}

.m31-shorts__card:focus-visible {
  outline: 2px solid var(--first-color, #008375);
  outline-offset: 2px;
}

@media (hover: hover) {
  .m31-shorts__card:hover {
    transform: translateY(-8px);
    box-shadow: 0 14px 32px rgba(0, 0, 0, 0.32);
  }

  .m31-shorts__card:hover .m31-shorts__img,
  .m31-shorts__card:hover .m31-shorts__preview {
    transform: scale(1.06);
  }

  .m31-shorts__card:hover .m31-shorts__play {
    transform: scale(1.1);
    box-shadow: 0 4px 16px rgba(0, 131, 117, 0.45);
  }
}

.m31-shorts__media {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-color: #1a1a1a;
  overflow: hidden;
}

.m31-shorts__img,
.m31-shorts__preview {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}

.m31-shorts__scrim {
  position: absolute;
  inset: auto 0 0;
  height: 48%;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.88) 0%,
    rgba(0, 0, 0, 0.45) 45%,
    transparent 100%
  );
  pointer-events: none;
}

.m31-shorts__play {
  position: absolute;
  top: 0.65rem;
  right: 0.65rem;
  z-index: 2;
  width: 2.15rem;
  height: 2.15rem;
  border-radius: 50%;
  background: var(--first-color, #008375);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.25);
  pointer-events: none;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.35s ease;
  animation: m31-play-pulse 2.4s ease-in-out infinite;
}

.m31-shorts__play::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid color-mix(in srgb, var(--first-color, #008375) 55%, transparent);
  animation: m31-play-ring 2.4s ease-out infinite;
  pointer-events: none;
}

@keyframes m31-play-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}

@keyframes m31-play-ring {
  0% { transform: scale(0.85); opacity: 0.7; }
  70% { transform: scale(1.35); opacity: 0; }
  100% { transform: scale(1.35); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .m31-shorts__play,
  .m31-shorts__play::after {
    animation: none;
  }
}

.m31-shorts__play i {
  font-size: 1rem;
  line-height: 1;
  transform: translateX(1px);
  position: relative;
  z-index: 1;
}

.m31-shorts__caption {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  z-index: 2;
  padding: 0.85rem 0.7rem 0.75rem;
  pointer-events: none;
}

.m31-shorts__title {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.45;
  color: #fff;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.55);
}

.m31-shorts__title mark,
.m31-player__title mark {
  background: transparent;
  color: var(--m31-accent);
  padding: 0;
}

/* Desktop nav — hidden on touch / small screens */
.m31-shorts__nav {
  display: none;
  position: absolute;
  top: 50%;
  z-index: 5;
  transform: translateY(-50%);
  width: 2.35rem;
  height: 2.35rem;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--m31-nav);
  align-items: center;
  justify-content: center;
  padding: 0;
  cursor: pointer;
  transition: color 0.2s ease, opacity 0.2s ease;
}

.m31-shorts__nav i {
  font-size: 1.65rem;
  line-height: 1;
  filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.35));
}

.m31-shorts__nav--prev {
  right: calc(var(--m31-inline, 1.75rem) - 0.15rem);
}

.m31-shorts__nav--next {
  left: calc(var(--m31-inline, 1.75rem) - 0.15rem);
}

.m31-shorts__nav:hover {
  color: #fff;
}

.m31-shorts__nav.swiper-button-disabled {
  opacity: 0;
  pointer-events: none;
}

@media (min-width: 992px) {
  .m31-shorts__nav {
    display: inline-flex;
  }

  .m31-shorts.is-locked .m31-shorts__nav {
    display: none;
  }
}

/* —— Fullscreen player —— */
.m31-player {
  position: fixed;
  inset: 0;
  z-index: 12000;
  display: flex;
  align-items: stretch;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.m31-player.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.m31-player__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  opacity: 0;
  transition: opacity 0.35s ease;
}

.m31-player.is-open .m31-player__backdrop {
  opacity: 1;
}

.m31-player__shell {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  height: 100dvh;
  max-width: 480px;
  margin-inline: auto;
  background: #000;
  overflow: hidden;
  transform: translateY(24px) scale(0.97);
  opacity: 0;
  transition: transform 0.42s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.35s ease;
}

.m31-player.is-open .m31-player__shell {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.m31-player__swiper,
.m31-player__slide {
  width: 100%;
  height: 100%;
}

.m31-player__slide {
  position: relative;
  background: #000;
  display: block;
  overflow: hidden;
}

/* Full-bleed stage so contain letterboxing is equal top/bottom */
.m31-player__stage {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.m31-player__video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center center;
  background: #000;
}

.m31-player__tapplay {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: none;
  align-items: center;
  justify-content: center;
  border: 0;
  background: rgba(0, 0, 0, 0.22);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.m31-player__slide.is-paused .m31-player__tapplay {
  display: flex;
}

.m31-player__tapplay-circle {
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 50%;
  background: var(--first-color, #008375);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.35);
}

.m31-player__tapplay-circle i {
  font-size: 1.55rem;
  line-height: 1;
  width: 1em;
  height: 1em;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: translateX(1px);
  margin: 0;
  padding: 0;
}

/* Small green spinner while buffering / stuck */
.m31-player__loader {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: none;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  background: transparent;
}

.m31-player__slide.is-loading .m31-player__loader {
  display: flex;
}

.m31-player__slide.is-loading .m31-player__tapplay {
  display: none !important;
}

.m31-player__spinner {
  width: 1.65rem;
  height: 1.65rem;
  border-radius: 50%;
  border: 2.5px solid rgba(0, 131, 117, 0.25);
  border-top-color: var(--first-color, #008375);
  animation: m31-spin 0.7s linear infinite;
  box-sizing: border-box;
}

@keyframes m31-spin {
  to { transform: rotate(360deg); }
}

.m31-player__actions {
  position: absolute;
  z-index: 6;
  left: 0.75rem;
  bottom: calc(5.75rem + env(safe-area-inset-bottom, 0px));
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  pointer-events: auto;
}

.m31-player__action {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  border: 0;
  background: transparent;
  color: #fff;
  cursor: pointer;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

.m31-player__action-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(20, 20, 20, 0.38);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease, background 0.2s ease;
}

.m31-player__action-icon i {
  font-size: 1.25rem;
  line-height: 1;
}

.m31-player__action:active .m31-player__action-icon,
.m31-player__action.is-pop .m31-player__action-icon {
  transform: scale(1.12);
}

.m31-player__like.is-liked .m31-player__action-icon {
  background: rgba(220, 53, 69, 0.92);
  border-color: transparent;
}

.m31-player__like.is-liked i {
  color: #fff;
}

.m31-player__action-count {
  font-size: 0.75rem;
  font-weight: 700;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.55);
  min-height: 1em;
}

.m31-player__share.is-copied .m31-player__action-icon {
  background: var(--first-color, #008375);
}

/* Compact black bar over bottom letterbox — does not shrink the video */
.m31-player__footer {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  z-index: 5;
  width: 100%;
  background: #000;
  padding: 0.65rem 1rem calc(0.55rem + env(safe-area-inset-bottom, 0px));
  box-sizing: border-box;
}

.m31-player__meta {
  position: relative;
  padding: 0 0 0.5rem;
  background: transparent;
  pointer-events: none;
  text-align: right;
}

.m31-player__title {
  margin: 0 0 0.25rem;
  color: #fff;
  font-size: 0.95rem;
  font-weight: 800;
  line-height: 1.45;
}

.m31-player__desc {
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.78rem;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.m31-player__slide.is-desc-open .m31-player__desc {
  display: block;
  -webkit-line-clamp: unset;
}

.m31-player__more {
  pointer-events: auto;
  margin-top: 0.25rem;
  border: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  cursor: pointer;
}

/* Progress always LTR (left → right), even on RTL pages */
.m31-player__progress {
  position: relative;
  width: 100%;
  height: 3px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.25);
  overflow: hidden;
  pointer-events: none;
  direction: ltr !important;
  unicode-bidi: isolate;
}

.m31-player__progress-bar {
  display: block;
  height: 100%;
  width: 0%;
  max-width: 100%;
  border-radius: inherit;
  background: var(--first-color, #008375);
  margin-left: 0;
  margin-right: auto;
  transform-origin: left center;
  transition: width 0.15s linear;
}

.m31-player__close,
.m31-player__mute {
  position: absolute;
  z-index: 7;
  top: calc(0.75rem + env(safe-area-inset-top, 0px));
  width: 2.55rem;
  height: 2.55rem;
  border: 0;
  border-radius: 50%;
  background: rgba(20, 20, 20, 0.4);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.14);
  -webkit-tap-highlight-color: transparent;
}

.m31-player__close {
  right: 0.75rem;
}

.m31-player__mute {
  left: 0.75rem;
}

.m31-player__close i,
.m31-player__mute i {
  font-size: 1.15rem;
  line-height: 1;
}

.m31-player__close:hover,
.m31-player__mute:hover {
  background: rgba(20, 20, 20, 0.62);
}

body.m31-player-open {
  overflow: hidden;
  touch-action: none;
}

@media (min-width: 768px) {
  .m31-player__shell {
    max-width: 420px;
    height: min(92vh, 860px);
    align-self: center;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  }

  .m31-player {
    align-items: center;
    padding: 1rem;
  }
}