.upload-area.dragover{border-color:#764ba2;background:linear-gradient(45deg,#e8f2ff,#d0e8ff);transform:scale(1.02)}.editor-section.active{display:grid}.download-section.active{display:block}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;margin-top:40px}.feature-card{background:#fff;padding:25px;border-radius:15px;box-shadow:0 5px 15px rgba(0,0,0,.1);text-align:center;transition:transform .3s ease}.feature-card:hover{transform:translateY(-5px)}.feature-icon{width:60px;height:60px;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:50%;margin:0 auto 15px;display:flex;align-items:center;justify-content:center;font-size:24px;color:white}.feature-card h4{margin-bottom:10px;color:#333}.feature-card p{color:#666;font-size:.9rem}