alfresco-ng2-components/ng2-components/ng2-alfresco-search/src/components/search-control.component.scss

@mixin mat-search-control-theme($theme) {
    $background: map-get($theme, background);

    .adf {

        &-search-button.mat-button {
            border-radius: 50%;
            height: 32px;
            min-width: 20px;
            width: 32px;
            padding: 0;
            overflow: hidden;
            color: inherit;
            line-height: normal;
            border: none;
        }

        &-search-container {
            display: flex;
            align-items: center;

            .search-field {
                width: 260px;
                padding-top: 6px;

                .mat-input-container {
                    width: 100%;
                }

                .mat-input-underline .mat-input-ripple {
                    background-color: mat-color($background, card);
                }

                .mat-input-element {
                    font-size: 16px;
                }
            }

            .search-field .mat-input-infix {
                padding: 0px;
            }

            @media only screen and (max-width: 400px) {
                .search-field {
                    width: 200px;
                }
            }
            @media only screen and (max-width: 320px) {
                .search-field {
                    width: 160px;
                }
            }
        }

        &-search-form{
            overflow: hidden;
        }

        &-active-search,
        &-valid-search {
            display: block;
        }
    }
}