.youtube-gallery {
  width: 100%;
  padding: 20px 0;
}
.yt-thumb {
  position: relative;
  cursor: pointer;
}
.yt-thumb img {
  width: 100%;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
.yt-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 40px;
  color: white;
  text-shadow: 0 2px 6px rgba(0,0,0,0.8);
}
.yt-title {
  margin-top: 8px;
  text-align: center;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
}

/* Popup Base */
.yt-popup {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.95);
  z-index: 9999;
  justify-content: center;
  align-items: center;
}
.yt-popup-content {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
}
.yt-popup iframe {
  border: none;
}

/* Fullscreen Mode */
.yt-popup.fullscreen iframe {
  width: 100vw;
  height: 100vh;
  max-width: 100%;
  max-height: 100%;
}

/* Windowed Mode */
.yt-popup.windowed .yt-popup-content {
  width: 80%;
  height: 60%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.yt-popup.windowed iframe {
  width: 100%;
  height: 100%;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

/* Close Button */
.yt-close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 40px;
  color: #fff;
  cursor: pointer;
  z-index: 10000;
}