.iet-lab {
  align-items: start;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 380px);
}

.iet-card { min-width: 0; }

.iet-dropzone {
  align-items: center;
  background: #fbfcfd;
  border: 2px dashed var(--line);
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
  justify-content: center;
  min-height: 150px;
  padding: 20px;
  text-align: center;
}

.iet-dropzone:hover,
.iet-dropzone.is-dragging { background: var(--surface-soft); border-color: var(--accent); }
.iet-dropzone input { height: 1px; opacity: 0; position: absolute; width: 1px; }
.iet-drop-icon { color: var(--accent-strong); font-size: 30px; line-height: 1; }
.iet-dropzone span:not(.iet-drop-icon), .iet-note, .iet-file { color: var(--muted); font-size: 13px; }
.iet-file { margin: 10px 0 16px; overflow-wrap: anywhere; }

.iet-controls {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 14px 0;
}

.iet-controls label { min-width: 0; }
.iet-controls input[type="color"] { display: block; height: 42px; margin-top: 6px; padding: 3px; width: 64px; }
.iet-check { align-items: center; display: flex; gap: 8px; margin: 12px 0; }
.iet-actions { align-items: center; display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }

.iet-preview {
  align-items: center;
  background-color: #f3f5f5;
  background-image: linear-gradient(45deg, #e5e9e9 25%, transparent 25%), linear-gradient(-45deg, #e5e9e9 25%, transparent 25%), linear-gradient(45deg, transparent 75%, #e5e9e9 75%), linear-gradient(-45deg, transparent 75%, #e5e9e9 75%);
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
  background-size: 16px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  justify-content: center;
  min-height: 270px;
  overflow: hidden;
  padding: 12px;
}

.iet-preview img { display: block; max-height: 430px; max-width: 100%; object-fit: contain; }
.iet-preview-grid { display: grid; gap: 16px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.iet-preview-grid figure { margin: 0; min-width: 0; }
.iet-preview-grid figcaption { color: var(--muted); font-size: 13px; font-weight: 800; margin-bottom: 8px; }
.iet-summary { background: #f8fafc; }
.iet-summary > strong { display: block; font-size: 20px; overflow-wrap: anywhere; }
.iet-stat-grid { display: grid; gap: 10px; grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 16px 0; }
.iet-stat-grid > div { background: #fff; border: 1px solid var(--line); border-radius: 8px; display: grid; gap: 5px; min-width: 0; padding: 12px; }
.iet-stat-grid span { color: var(--muted); font-size: 12px; font-weight: 800; }
.iet-stat-grid strong { font-family: "SFMono-Regular", Consolas, monospace; overflow-wrap: anywhere; }
.iet-output-list { display: grid; gap: 8px; list-style: none; margin: 14px 0 0; padding: 0; }
.iet-output-list li { align-items: center; border-bottom: 1px solid var(--line); display: flex; gap: 10px; justify-content: space-between; padding: 8px 0; }
.iet-output-list code { font-size: 12px; overflow-wrap: anywhere; }
.iet-format-grid { display: grid; gap: 14px; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.iet-format-grid article { border-left: 3px solid var(--accent); min-width: 0; padding-left: 14px; }
.iet-format-grid h3 { margin: 0 0 6px; }
.iet-format-grid p { margin: 0; }

@media (max-width: 920px) { .iet-lab, .iet-preview-grid { grid-template-columns: 1fr; } }
@media (max-width: 620px) {
  .iet-controls, .iet-stat-grid, .iet-format-grid { grid-template-columns: 1fr; }
  .iet-actions .tool-button { justify-content: center; width: 100%; }
}