.b-numberinput {
    &.field {
        margin-bottom: 0;
        &.is-grouped {
            div.control {
                flex-grow: 1;
                flex-shrink: 1;
            }
        }
        &.has-addons {
            &.is-expanded {
                flex-grow: 1;
                flex-shrink: 1;
            }
        }
    }
    input[type=number]::-webkit-inner-spin-button,
    input[type=number]::-webkit-outer-spin-button {
        -webkit-appearance: none;
    }
    input[type=number] {
        -moz-appearance:textfield;
    }
    input[type=number] {
        text-align: center;
    }
    .button {
        &.is-rounded {
            padding-left: 0.75em;
            padding-right: 0.75em;
        }
    }
}

.b-numberinput {
    &.field {
        margin-bottom: 0;
        &.is-grouped {
            div.control {
                flex-grow: 1;
                flex-shrink: 1;
            }
        }
        &.has-addons {
            &.is-expanded {
                flex-grow: 1;
                flex-shrink: 1;
            }
        }
    }
    input[type=number]::-webkit-inner-spin-button,
    input[type=number]::-webkit-outer-spin-button {
        -webkit-appearance: none;
    }
    input[type=number] {
        -moz-appearance:textfield;
    }
    input[type=number] {
        text-align: center;
    }
    .button {
        &.is-rounded {
            padding-left: 1em;
            padding-right: 1em;
        }
    }
}

Fix rounded buttons on number input
Fix rounded buttons on number input
