better-xcloud/src/assets/css/button.styl

.bx-button {
    background-color: var(--bx-default-button-color);
    user-select: none;
    -webkit-user-select: none;
    color: #fff;
    font-family: var(--bx-title-font-semibold);
    font-size: 14px;
    border: none;
    font-weight: 400;
    height: var(--bx-button-height);
    border-radius: 4px;
    padding: 0 8px;
    text-transform: uppercase;
    cursor: pointer;
    overflow: hidden;

    &:focus {
        outline: none !important;
    }

    &:hover, &.bx-focusable:focus {
        background-color: var(--bx-default-button-hover-color);
    }

    &:disabled {
        cursor: default;
        background-color: var(--bx-default-button-disabled-color);
    }

    &.bx-ghost {
        background-color: transparent;

        &:hover, &.bx-focusable:focus {
            background-color: var(--bx-default-button-hover-color);
        }
    }

    &.bx-primary {
        background-color: var(--bx-primary-button-color);

        &:hover, &.bx-focusable:focus {
            background-color: var(--bx-primary-button-hover-color);
        }

        &:disabled {
            background-color: var(--bx-primary-button-disabled-color);
        }
    }

    &.bx-danger {
        background-color: var(--bx-danger-button-color);

        &:hover, &.bx-focusable:focus {
            background-color: var(--bx-danger-button-hover-color);
        }

        &:disabled {
            background-color: var(--bx-danger-button-disabled-color);
        }
    }

    svg {
        display: inline-block;
        width: 16px;
        height: var(--bx-button-height);

        &:not(:only-child) {
            margin-right: 4px;
        }
    }

    span {
        display: inline-block;
        height: var(--bx-button-height);
        line-height: var(--bx-button-height);
        vertical-align: middle;
        /* vertical-align: -webkit-baseline-middle; */
        color: #fff;
        overflow: hidden;
        white-space: nowrap;
    }

    &.bx-focusable {
        position: relative;

        &::after {
            border: 2px solid transparent;
            border-radius: 4px;
        }

        &:focus::after {
            content: '';
            border-color: white;
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
        }
    }
}

a.bx-button {
    display: inline-block;

    &.bx-full-width {
        text-align: center;
    }
}