jitsi-meet/css/components/_button-control.scss

.button-control {
    box-sizing: border-box;
    display: inline-block;
    border: 1px solid $buttonBorder;
    vertical-align: baseline;
    height: 30px;
    min-width: 60px;
    padding: 4px 10px;
    margin: 0;
    line-height: 1.5em;
    outline: none;
    background-color: transparent;
    float: right;
    font-size: 14px;
    margin-left: 10px;
    color: $buttonColor;
    font-weight: $buttonFontWeight;
    @include transition(background-color .1s ease-out);

    &[disabled] {
        color: #666;
        cursor: default;
    }

    &_full-width {
        margin: 0;
        width: 100%;
    }

    &:hover {
        border: 1px solid $buttonHoverBorder;
        background-color: $buttonHoverBackground;
        @include transition(background-color .1s ease-in);
    }

    &:active {
        @include box-shadow(0, 0, 1px, $buttonShadowColor, true);
    }

    &_light {
        color: $defaultDarkColor;
        background-color: $buttonLightBackground;
        border: 1px solid $buttonLightBorder;

        &:hover {
            border: 1px solid $buttonLightHoverBorder;
            background-color: $buttonLightHoverBackground;
        }
    }

    &_link {
        color: $buttonLinkColor;
        background-color: $buttonLinkBackground;

        &:hover {
            background-color: $buttonLinkBackground;
        }
    }

    &_overlay {
        color: $primaryButtonColor;
        background-color: $overlayButtonBg;
        border-radius: 2px;
        border: none;

        &:hover {
            background-color: $primaryButtonBackground;
            border: none;
        }
    }

    &_primary {
        background-color: $primaryButtonBackground;
        border: 1px solid $primaryButtonBackground;
        color: $primaryButtonColor !important;
        font-weight: $primaryButtonFontWeight;

        &:hover {
            border: 1px solid $primaryButtonHoverBackground;
            background-color: $primaryButtonHoverBackground;
        }

        &[disabled] {
            color: $primaryButtonColor;
        }
    }

    &_close {
        color: $defaultFontColor;
    }
    &_submit {
        color: $linkFontColor;
        &:hover {
            color: $linkHoverFontColor;
        }
    }

    &_center {
        float: none !important;
    }
}