.ylv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  align-items: start;
}
.ylv-video-box {
  background: #ffffff;
  border-radius: 8px;
  padding: 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}
.ylv-thumb {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: 6px;
}
.ylv-thumb iframe {
  position: absolute;
  top:0;
  left:0;
  width:100%;
  height:100%;
  border:0;
}
.ylv-title {
  font-size: 15px;
  margin: 10px 0 6px;
  line-height: 1.2;
}
.ylv-desc {
  font-size: 13px;
  color: #555;
  margin: 0;
}
.ylv-error {
  color: #cc0000;
  background: #fff4f4;
  padding: 8px;
  border-radius: 6px;
}