.upload-zone{border:2px dashed var(--gray-300);border-radius:var(--radius);padding:3.5rem 1rem;text-align:center;cursor:pointer;transition:var(--transition);background:var(--gray-100)}.dark .upload-zone{border-color:rgba(255,255,255,0.1);background:rgba(255,255,255,0.02)}