.course-image-preview{display:block;width:100%;max-height:360px;object-fit:contain;background:#f0f5f6;border:1px solid #dce6e8;border-radius:10px;margin:16px 0}
.course-image-preview[hidden]{display:none}
.course-image-empty{padding:32px 20px;background:#f0f5f6;border:1px dashed #a6bbc2;border-radius:10px;color:#526c79;text-align:center;margin:16px 0}
.course-image-thumb{display:block;width:72px;height:52px;object-fit:cover;border-radius:6px;flex:0 0 72px}
.course-image-card{display:block;width:100%;height:190px;object-fit:cover;border-radius:8px;margin:0 0 20px}
.course-image-hero{display:block;width:100%;height:auto;max-height:390px;object-fit:contain;border-radius:12px;background:#edf3f4}
.course-upload-row{padding:18px;border:1px solid #dce6e8;background:#f7fafb;border-radius:8px;margin:12px 0}
.course-upload-row label{display:block;font-weight:700;color:#102d43;margin-bottom:10px}
.course-upload-row input[type=file],.course-image-panel input[type=file]{width:100%;max-width:100%;box-sizing:border-box}
.course-upload-row .course-image-preview{max-height:180px;margin-bottom:0}
.course-image-help{font-size:14px;color:#536975;line-height:1.6}
@media(max-width:600px){.course-image-card{height:170px}.course-image-thumb{width:58px;height:46px;flex-basis:58px}.course-upload-row{padding:14px}}