.viser-iframe {
  display: block;
  width: 100%;
  height: min(72vh, 700px);
  min-height: 420px;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  background: #f8fafc;
}
.viser-launch {
  width: 100%;
  position: relative;
  overflow: hidden;
  min-height: 360px;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  border: 1px solid #d5deea;
  border-radius: 12px;
  color: #243750;
  background: radial-gradient(ellipse at center, #fff, #eaf0f7);
  font: inherit;
  cursor: pointer;
}
.viser-launch strong { font-size: 1.5rem; }
.viser-launch span { color: #52677f; }
.viser-launch:hover { border-color: #3273dc; }
.viser-launch:focus-visible, [role="tab"]:focus-visible {
  outline: 3px solid #3273dc;
  outline-offset: 3px;
}
.viser-toolbar { display: flex; justify-content: space-between; padding: .75rem 0; }
.viser-toolbar button { font: inherit; cursor: pointer; }
.viser-iframe[hidden], .viser-launch[hidden], .viser-toolbar[hidden] { display: none; }
@media (max-width: 600px) {
  .viser-iframe { min-height: 360px; height: 65vh; }
  .viser-launch strong { font-size: 1.2rem; }
}

.viser-launch img { width: 100%; height: 420px; object-fit: contain; background: #cdd7e2; }
.viser-caption {
  position: absolute; bottom: 0; left: 0; right: 0;
  display: flex; flex-direction: column; gap: .35rem;
  padding: 1.25rem; background: rgba(239, 244, 250, .95);
}
@media (max-width: 600px) {
  .viser-launch { min-height: 300px; }
  .viser-launch img { height: 300px; }
  .viser-caption { padding: .8rem; }
}