.drop-zone {
    transition: all 0.2s ease;
}
.drop-zone.dragover {
    border-color: #3b82f6;
    background-color: rgba(59, 130, 246, 0.1);
}
.step-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
    font-size: 14px;
}
.step-pending .step-icon { background: #374151; color: #6b7280; }
.step-active .step-icon { background: #3b82f6; color: white; animation: pulse 1.2s infinite; }
.step-done .step-icon { background: #22c55e; color: white; }
.step-error .step-icon { background: #ef4444; color: white; }

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.fade-in {
    animation: fadeIn 0.3s ease;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}