.upload-box.drag-over{border-color:#48bb78;background:linear-gradient(135deg,#f0fff4 0%,#c6f6d5 100%);transform:scale(1.02)}.preview-box.has-image{border-style:solid;border-color:#667eea;background:#fff}.preview-image{max-width:100%;max-height:200px;border-radius:8px;box-shadow:0 4px 10px rgba(0,0,0,.1);margin-bottom:10px}.file-info{font-size:.9rem;color:#718096}.file-size{font-weight:600;color:#2d3748}.fade-in{animation:fadeIn .5s ease-in}.hidden{display:none!important}