Wallet/src/sass/buttons.scss

%button-standard {
  width: 85%;
  max-width: 300px;
  margin-left: auto;
  margin-right: auto;
  display: block;
}

.button,
.onboarding .button {
  &.button-primary {
    @include button-style($v-button-primary-bg, $v-button-primary-border, $v-button-primary-active-bg, $v-button-primary-active-border, $v-button-primary-color);
    @include button-clear($v-button-primary-bg);
    @include button-outline($v-button-primary-bg);
  }
  &.button-primary,
  &.button-secondary,
  &.button-light,
  &.button-assertive {
    &.button-standard {
      @extend %button-standard;
      & + .button-standard {
        margin-top: 1rem;
      }
    }
  }
}
.onboarding .button {
  &.button-secondary {
    @include button-style($v-onboarding-button-secondary-bg, $v-onboarding-button-secondary-border, $v-onboarding-button-secondary-active-bg, $v-onboarding-button-secondary-active-border, $v-onboarding-button-secondary-color);
    @include button-clear($v-onboarding-button-secondary-color);
    @include button-outline($v-onboarding-button-secondary-color);
  }
}

.button {
  &.button-secondary {
    @include button-style($v-button-secondary-bg, $v-button-secondary-border, $v-button-secondary-active-bg, $v-button-secondary-active-border, $v-button-secondary-color);
    @include button-clear($v-button-secondary-color);
    @include button-outline($v-button-secondary-color);
  }
}

.button-sendmax {
  font-size: 0.7em !important;
  display: inline !important;
}