/* =========================================================================
   media.css — KHOI VIDEO, THU VIEN ANH, VA HOP XEM PHONG TO (lightbox)
   ========================================================================= */

/* ── Khung video ────────────────────────────────────────── */
.video {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--sh-xl);
  background: #000;
  aspect-ratio: 16 / 9;
  cursor: pointer;
}
.video img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .9s var(--ease-out), filter var(--dur) var(--ease);
}
.video:hover img { transform: scale(1.045); filter: brightness(.82); }

.video__veil {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,.10) 0%, rgba(0,0,0,.55) 100%);
}

/* Nut Play + hai vong tron lan ra. */
.video__play {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 84px; height: 84px;
  display: grid; place-items: center;
  border: 0;
  border-radius: 50%;
  background: var(--accent-solid);
  color: var(--accent-fg);
  cursor: pointer;
  box-shadow: 0 12px 40px rgba(232, 163, 23, .5);
  transition: transform var(--dur) var(--ease-spring), background-color var(--dur) var(--ease);
}
.video:hover .video__play { transform: translate(-50%, -50%) scale(1.1); background: var(--accent-hover); }
.video__play::before,
.video__play::after {
  content: "";
  position: absolute; inset: 0;
  border-radius: 50%;
  border: 2px solid var(--accent-solid);
  animation: mt-ripple 2.6s var(--ease-out) infinite;
}
.video__play::after { animation-delay: 1.3s; }

/* Doan chu duoi cung: ten video + thoi luong. */
.video__meta {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 22px 24px;
  color: #fff;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
}
.video__meta h3 { color: #fff; margin: 0 0 4px; font-size: 1.15rem; }
.video__meta p  { color: rgba(255,255,255,.78); margin: 0; font-size: var(--fs-sm); }
.video__time {
  flex: none;
  background: rgba(0,0,0,.55);
  -webkit-backdrop-filter: blur(6px);
          backdrop-filter: blur(6px);
  border-radius: var(--radius-pill);
  padding: 5px 12px;
  font-size: var(--fs-xs);
  font-weight: 650;
}

/* Danh sach chuong ben canh video. */
.chapters { display: grid; gap: 8px; align-content: start; }
.chapter {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
  text-align: left;
  font: inherit;
  color: var(--text);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease),
              background-color var(--dur-fast) var(--ease),
              transform var(--dur) var(--ease-out);
}
.chapter:hover { border-color: var(--accent); background: var(--accent-soft); transform: translateX(3px); }
.chapter__i { color: var(--accent); display: grid; place-items: center; }
.chapter__t { font-size: var(--fs-sm); font-weight: 650; }
.chapter__s { font-size: var(--fs-xs); color: var(--text-faint); }

/* ── Thu vien anh ───────────────────────────────────────── */
/* grid-auto-flow: dense de o to nhet vua cho trong, khong de lo hong. */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  grid-auto-rows: 190px;
  grid-auto-flow: dense;
  gap: 16px;
}
.gallery__item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface-3);
  cursor: zoom-in;
  padding: 0;
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease);
}
.gallery__item:hover { transform: translateY(-4px); box-shadow: var(--sh-lg); }
.gallery__item img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease-out); }
.gallery__item:hover img { transform: scale(1.07); }

.gallery__item--tall { grid-row: span 2; }
.gallery__item--wide { grid-column: span 2; }
@media (max-width: 620px) {
  .gallery__item--wide { grid-column: span 1; }
  .gallery__item--tall { grid-row: span 1; }
}

.gallery__cap {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 34px 16px 14px;
  background: linear-gradient(180deg, transparent, rgba(0,0,0,.78));
  color: #fff;
  font-size: var(--fs-xs);
  font-weight: 650;
  text-align: left;
  transform: translateY(8px);
  opacity: 0;
  transition: transform var(--dur) var(--ease-out), opacity var(--dur) var(--ease);
}
.gallery__item:hover .gallery__cap { transform: none; opacity: 1; }

/* ── Hop xem phong to ───────────────────────────────────── */
/* Dung cho CA anh lan video. js/lightbox.js quyet dinh nhet gi vao trong. */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: grid;
  place-items: center;
  padding: clamp(16px, 4vw, 48px);
  background: var(--overlay);
  -webkit-backdrop-filter: blur(10px);
          backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur) var(--ease), visibility var(--dur);
}
.lightbox.is-open { opacity: 1; visibility: visible; }

.lightbox__box {
  position: relative;
  width: min(1100px, 100%);
  max-height: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #000;
  box-shadow: var(--sh-xl);
  transform: scale(.94) translateY(12px);
  transition: transform .4s var(--ease-spring);
}
.lightbox.is-open .lightbox__box { transform: none; }

.lightbox__box img,
.lightbox__box video,
.lightbox__box iframe {
  width: 100%;
  max-height: calc(100vh - 140px);
  display: block;
  border: 0;
  background: #000;
  object-fit: contain;
  aspect-ratio: 16 / 9;
}
.lightbox__box img { aspect-ratio: auto; }

.lightbox__cap {
  padding: 12px 18px;
  background: var(--card);
  color: var(--text-muted);
  font-size: var(--fs-sm);
  text-align: center;
}

/* Nut dong / truoc / sau. */
.lb-btn {
  position: absolute;
  z-index: 2;
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border: 0;
  border-radius: 50%;
  background: rgba(20, 26, 34, .72);
  color: #fff;
  cursor: pointer;
  -webkit-backdrop-filter: blur(6px);
          backdrop-filter: blur(6px);
  transition: background-color var(--dur-fast) var(--ease), transform var(--dur) var(--ease-spring);
}
.lb-btn:hover { background: var(--accent-solid); transform: scale(1.08); }
.lb-close { top: 12px; right: 12px; }
.lb-prev  { left: 12px;  top: 50%; margin-top: -22px; }
.lb-next  { right: 12px; top: 50%; margin-top: -22px; }

/* ── Chưa có video ──────────────────────────────────────────────────────
   home/lightbox.js gắn .is-soon khi shared/js/config.js chưa khai báo
   nguồn video. Vẫn cho bấm (bấm sẽ hiện một câu giải thích), nhưng làm mờ
   nút phát để người dùng không kỳ vọng rồi hụt. */
.video.is-soon .video__play {
  opacity: .45;
  filter: grayscale(1);
}

.video.is-soon::after {
  content: 'Sắp có';
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .06em;
}

.chapter.is-soon { opacity: .6; }