lostplaces-frontend/components/03_Organisms/form/_form.scss

.LP-Form{
    .LP-Form__Fieldset{
        border: none;

        .LP-Form__Legend{
            margin: 0;
			padding: 0;
			font-family: $-primary-sans-serif-font;
			font-size: 21px;
        }

        .LP-Form__Composition{
            display: flex;
            flex-direction: row;
            justify-content: space-between;

            .LP-Form__Field{
                flex: 3 1 100px;
                padding: 6px 15px;

                &--wider{
                    flex: 5 1;
                }

                &--wide{
                    flex: 4 1;
                }

                &--narrow{
                    flex: 2 0;
                }

                &--narrower{
                    flex: 1 0;
                }
            }
        }
    }
}

@media(max-width: $-viewport-small){
    .LP-Form{
        .LP-Form__Fieldset{
            .LP-Form__Composition--breakable{
                display: flex;
                flex-direction: column;
                justify-content: space-between;
            }
        }
    }
}

@media(max-width: $-viewport-extra-small){
    .LP-Form{
        .LP-Form__Fieldset{
            .LP-Form__Composition{
                display: flex;
                flex-direction: column;
                justify-content: space-between;

                .LP-Form__Field{
					flex: 3 1 100px;
					padding: 12px 15px;
                }
            }
        }
    }
}