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var(--border-subtle);background:var(--bg-app);width:calc(100% - 28px);min-height:180px;color:var(--text-main);cursor:pointer;border-radius:8px;align-content:center;place-items:center;gap:10px;margin:14px;display:grid}.dropzone.is-dragover{border-color:var(--border-focus)}.upload-preview{padding:0 14px 14px}.modal-shell{border:1px solid var(--border-subtle);background:var(--bg-panel);width:min(680px,100%);max-height:min(760px,88vh);box-shadow:var(--shadow-float);border-radius:8px;overflow:auto}.modal-shell__header,.modal-shell__footer{border-bottom:1px solid var(--border-subtle);justify-content:space-between;align-items:center;gap:12px;padding:14px;display:flex}.modal-shell__footer{border-top:1px solid var(--border-subtle);border-bottom:0;justify-content:flex-end}.preview-card,.warning-list{border:1px solid 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