main.kv

#:kivy 1.0.9

<MDBoxLayout>:
    orientation: 'vertical'
    minimum_width: 100
    # pos_hint: {'center_x': 0.5,'center_y': 0.5}
    
<MDChip>:
    line_color: app.theme_cls.disabled_hint_text_color

<MDLabel>:
    adaptive_height: True
    minimum_height: 30

MDBoxLayout:
    valign: 'center'
    orientation: "vertical"
    # adaptive_size: True
    # pos_hint: {"center_x": 1, "center_y": 1}
    
    MDBoxLayout:
        orientation: 'horizontal'
        adaptive_height: True
        minimum_height: 60
        padding: 30, 10
        MDTextField:
            id: lemma_field
            mode: 'rectangle'
            hint_text: 'testing'
        MDIconButton:
            icon: 'magnify'
            on_release: app.search()
    AnchorLayout:
        anchor_x: 'center'
        anchor_y: 'center'        
        padding: 25, 10, 25, 25
        MDCard:
            DataCard:
                id: datacard