.tab-nav{display:flex;gap:10px;margin-bottom:2rem}
.tab-btn{padding:10px 24px;border-radius:24px;font-weight:700;font-size:.84rem;text-decoration:none;transition:all .2s}
.tab-btn.active{background:var(--blue);color:#fff}
.tab-btn:not(.active){background:var(--sky);border:1.5px solid var(--sky2);color:var(--blue-dark)}
.tab-btn:not(.active):hover{background:var(--sky2)}

.slideshow {
  position: relative;
  width: 100%;
  border-radius: 18px;
  overflow: hidden;
  background: #0a1520;
  box-shadow: 0 20px 60px rgba(0,0,0,.25);
  user-select: none;
height: clamp(600px, 90vh, 1000px);
}

.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity .8s cubic-bezier(.4,0,.2,1);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.slide.active {
  opacity: 1;
  pointer-events: auto;
}

/* Blurred background — fills the whole box behind the image */
.slide-bg {
  position: absolute;
  inset: -30px;
  background-size: cover;
  background-position: center;
  filter: blur(28px) brightness(.4) saturate(.6);
  z-index: 0;
}

.slide img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  box-shadow: 0 8px 40px rgba(0,0,0,.5);
}

.slide.active .slide-bg {
  animation: kenBurns 8s ease-in-out forwards;
}
@keyframes kenBurns {
  from { transform: scale(1);    transform-origin: 55% 50%; }
  to   { transform: scale(1.08); transform-origin: 45% 50%; }
}

.slide-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 60px 28px 22px;
  background: linear-gradient(transparent, rgba(5,15,30,.75));
  color: #fff;
  font-size: .9rem;
  letter-spacing: .01em;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity .5s .3s, transform .5s .3s;
  z-index: 2;
}
.slide.active .slide-caption {
  opacity: 1;
  transform: none;
}

.slide-counter {
  position: absolute;
  top: 16px; right: 18px;
  background: rgba(0,0,0,.45);
  backdrop-filter: blur(6px);
  color: rgba(255,255,255,.85);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .06em;
  padding: 4px 11px;
  border-radius: 20px;
  z-index: 20;
  pointer-events: none;
}

.slide-btn {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  z-index: 20;
  background: rgba(255,255,255,.12);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,.2);
  color: #fff;
  width: 46px; height: 46px;
  border-radius: 50%;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .2s, transform .15s;
}
.slide-btn:hover  { background: rgba(255,255,255,.25); }
.slide-btn:active { transform: translateY(-50%) scale(.93); }
.slide-btn.prev { left: 16px; }
.slide-btn.next { right: 16px; }

.slide-dots {
  position: absolute;
  bottom: 16px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 7px;
  z-index: 20;
}
.dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: rgba(255,255,255,.35);
  cursor: pointer;
  transition: background .25s, transform .25s;
  border: none; padding: 0;
}
.dot.active {
  background: #fff;
  transform: scale(1.35);
}

.thumb-strip {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--sky2, #c8dff0) transparent;
}
.thumb-strip::-webkit-scrollbar { height: 4px; }
.thumb-strip::-webkit-scrollbar-track { background: transparent; }
.thumb-strip::-webkit-scrollbar-thumb { background: var(--sky2, #c8dff0); border-radius: 99px; }

.thumb {
  flex: 0 0 90px;
  height: 60px;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  opacity: .5;
  border: 2px solid transparent;
  transition: opacity .2s, border-color .2s, transform .15s;
}
.thumb:hover  { opacity: .8; }
.thumb.active { opacity: 1; border-color: var(--blue, #1a6db5); transform: scale(1.05); }
.thumb img    { width: 100%; height: 100%; object-fit: cover; display: block; }

.progress-bar {
  position: absolute;
  bottom: 0; left: 0;
  height: 3px;
  background: rgba(255,255,255,.7);
  width: 0%;
  z-index: 25;
  border-radius: 0 2px 2px 0;
}

.play-btn {
  position: absolute;
  top: 16px; left: 18px;
  z-index: 20;
  background: rgba(0,0,0,.4);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,.15);
  color: rgba(255,255,255,.85);
  width: 34px; height: 34px;
  border-radius: 50%;
  font-size: .8rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .2s;
}
.play-btn:hover { background: rgba(0,0,0,.65); }

.fs-btn {
  position: absolute;
  top: 16px; left: 60px;
  z-index: 20;
  background: rgba(0,0,0,.4);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,.15);
  color: rgba(255,255,255,.85);
  width: 34px; height: 34px;
  border-radius: 50%;
  font-size: .75rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .2s;
}
.fs-btn:hover { background: rgba(0,0,0,.65); }

.empty-card {
  text-align: center; padding: 60px 24px;
}
.empty-card .card-icon { font-size: 2.5rem; margin-bottom: 12px; }

@media (max-width: 700px) {
  /* On mobile, let viewport height drive it — still generous for portraits */
  .slideshow { height: clamp(460px, 85vh, 800px); border-radius: 12px; }
  .thumb-strip { display: none; }
  .slide-btn { width: 38px; height: 38px; font-size: .95rem; }
}
@media (max-width: 420px) {
.slideshow { height: clamp(400px, 85vh, 700px); }
}
<style>
.tab-nav{display:flex;gap:10px;margin-bottom:2rem}
.tab-btn{padding:10px 24px;border-radius:24px;font-weight:700;font-size:.84rem;text-decoration:none;transition:all .2s}
.tab-btn.active{background:var(--blue);color:#fff}
.tab-btn:not(.active){background:var(--sky);border:1.5px solid var(--sky2);color:var(--blue-dark)}
.tab-btn:not(.active):hover{background:var(--sky2)}

.video-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.video-card{background:#fff;border:1.5px solid var(--sky2);border-radius:12px;overflow:hidden;transition:box-shadow .2s}
.video-card:hover{box-shadow:0 6px 24px rgba(41,128,185,.13)}

.video-thumb{width:100%;aspect-ratio:16/9;background:var(--blue-deep);position:relative;overflow:hidden}
.video-thumb iframe{width:100%;height:100%;border:none;display:block}
.video-thumb video{width:100%;height:100%;object-fit:cover;display:block}

/* Lazy-load overlay: click to load iframe */
.video-thumb .lazy-cover{
  position:absolute;inset:0;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  background:#0a1520;
}
.video-thumb .lazy-cover img{width:100%;height:100%;object-fit:cover;opacity:.6;display:block}
.video-thumb .lazy-cover .play-icon{
  position:absolute;
  width:64px;height:64px;border-radius:50%;
  background:rgba(255,255,255,.92);
  display:flex;align-items:center;justify-content:center;
  font-size:1.5rem;
  box-shadow:0 4px 24px rgba(0,0,0,.35);
  transition:transform .15s;
}
.video-thumb .lazy-cover:hover .play-icon{transform:scale(1.1)}

.video-body{padding:16px 18px}
.video-body h3{font-family:'Playfair Display',serif;font-size:1rem;color:var(--ink);margin-bottom:4px}
.video-body p{color:var(--muted);font-size:.82rem}

.empty-card{text-align:center;padding:60px 24px}
.empty-card .card-icon{font-size:2.5rem;margin-bottom:12px}

@media(max-width:700px){.video-grid{grid-template-columns:1fr}}
</style>