body {
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    background: #f5f7fb;
}
.bg-gradient-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.card, .list-group-item {
    border: none;
}
.btn, .form-control, .rounded-pill {
    border-radius: 40px !important;
}
.rounded-4 {
    border-radius: 1.5rem !important;
}
.navbar {
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
#video, #canvas, #preview {
    border-radius: 24px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}