.nut-button {
  position: relative;
  display: inline-block;
  flex-shrink: 0;
  height: $button-default-height;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  width: $button-width;
  line-height: $button-default-line-height;
  font-size: $button-default-font-size;
  text-align: center;
  cursor: pointer;
  transition: opacity 0.2s;
  -webkit-appearance: none;
  user-select: none;
  touch-action: manipulation;

  color: $button-default-color;
  background: $button-default-bg-color;
  border: $button-border-width solid $button-default-border-color;

  .nut-button-text {
    &-left {
      margin-left: $button-text-icon-margin-left;
    } 
    &-right {
      margin-right: $button-text-icon-margin-left;
    }
  }

  // &::before {
  //   position: absolute;
  //   top: 50%;
  //   left: 50%;
  //   width: 100%;
  //   height: 100%;
  //   background-color: #f0f0f0;
  //   border: inherit;
  //   border-color: #f0f0f0;
  //   border-radius: inherit;
  //   transform: translate(-50%, -50%);
  //   opacity: 0;
  //   content: ' ';
  // }

  &::after {
    border: none;
  }

  &:active {
    background-color: $button-default-active-bg-color;
  }

  &__warp {
    height: 100%;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: initial;
  }

  &--loading,
  &--disabled {
    &:active {
      background-color: initial;
    }
  }

  &--solid {
    color: $button-primary-color;
    background: $button-primary-background-color;
    border: $button-border-width solid transparent;
  }

  &.nut-button--outline {
    color: $button-primary-border-color;
    border-color: $button-primary-border-color;
    background: transparent;
    &:active {
      background-color: $button-outline-active-bg-color;
    }
  }

  &.nut-button--none {
    color: $button-none-color;
    background: transparent;
    border-color: transparent;
    font-size: $button-none-font-size;
    padding: 0;
    height: auto;
    line-height: unset;
    border-radius: 0;
    .nut-button-text {
      &-left {
        margin-left: $button-none-text-icon-margin-left;
      } 
      &-right {
        margin-right: $button-none-text-icon-margin-left;
      }
    }
  }

  &--primary {
    color: $button-primary-color;
    background: $button-primary-background-color;
    border: $button-border-primary-width solid transparent;
    &:active {
      background-color: $button-primary-active-bg-color;
    }
    &.nut-button--plain {
      color: $button-primary-plain-color;
      background: $button-primary-plain-background-color;
      &:active {
        background-color: $button-plain-active-bg-color;
      }
    }
    &.nut-button--outline {
      color: $button-primary-border-color;
      border-color: $button-primary-border-color;
      border: $button-border-width solid $button-primary-border-color;
      background: transparent;
    }

    &.nut-button--none {
      color: $button-primary-border-color;
      background: transparent;
      border-color: transparent;
    }
  }

  &--info {
    color: $button-info-color;
    background: $button-info-background-color;
    border: $button-border-width solid transparent;

    &.nut-button--outline {
      color: $button-info-border-color;
      border-color: $button-info-border-color;
      background: transparent;
    }

    &.nut-button--none {
      color: $button-info-border-color;
      background: transparent;
      border-color: transparent;
    }
  }

  &--success {
    color: $button-success-color;
    background: $button-success-background-color;
    border: $button-border-width solid transparent;
    &:active {
      background-color: $button-success-background-color;
    }
    &.nut-button--outline {
      color: $button-success-border-color;
      border-color: $button-success-border-color;
      background: transparent;
      &:active {
        background-color: transparent;
      }
    }

    &.nut-button--none {
      color: $button-success-border-color;
      background: transparent;
      border-color: transparent;
      &:active {
        background-color: transparent;
      }
    }
  }

  &--danger {
    color: $button-danger-color;
    background: $button-danger-background-color;
    border: $button-border-width solid transparent;
    &:active {
      background-color: $button-danger-background-color;
    }
    &.nut-button--outline {
      color: $button-danger-border-color;
      border-color: $button-danger-border-color;
      background: transparent;
      &:active {
        background-color: transparent;
      }
    }

    &.nut-button--none {
      color: $button-danger-border-color;
      background: transparent;
      border-color: transparent;
      &:active {
        background-color: transparent;
      }
    }
  }

  &--warning {
    color: $button-warning-color;
    background: $button-warning-background-color;
    border: $button-border-width solid transparent;
    &:active {
      background-color: $button-warning-background-color;
    }
    &.nut-button--outline {
      color: $button-warning-border-color;
      border-color: $button-warning-border-color;
      background: transparent;
      &:active {
        background-color: transparent;
      }
    }

    &.nut-button--none {
      color: $button-warning-border-color;
      background: transparent;
      border-color: transparent;
      &:active {
        background-color: transparent;
      }
    }
  }

  &--large {
    padding: $button-large-padding;
    // width: 100%;
    height: $button-large-height;
    line-height: $button-large-line-height;
    font-size: $button-large-font-size !important;
    .nut-button-text {
      &-left {
        margin-left: $button-text-icon-large-margin-left;
      } 
      &-right {
        margin-right: $button-text-icon-large-margin-left;
      }
    }
    .text {
      margin-left: $button-text-icon-large-margin-left;
    }
    &.nut-button--icon {
      padding: $button-large-icon-default-padding;
    }
  }

  &--normal {
    padding: $button-default-padding;
    font-size: $button-default-font-size;
    &.nut-button--icon {
      padding: $button-icon-default-padding;
    }
  }
  

  &--small {
    height: $button-small-height;
    line-height: $button-small-line-height;
    padding: $button-small-padding;
    font-size: $button-small-font-size !important;
    .nut-button-text {
      &-left {
        margin-left: $button-text-icon-small-margin-left;
      } 
      &-right {
        margin-right: $button-text-icon-small-margin-left;
      }
    }
    .text {
      margin-left: $button-text-icon-small-margin-left;
    }
    &.nut-button--icon {
      padding: $button-small-icon-default-padding;
    }
  }

  &--mini {
    height: $button-mini-height;
    line-height: $button-mini-line-height;
    padding: $button-mini-padding;
    font-size: $button-mini-font-size !important;
    .nut-button-text {
      &-left {
        margin-left: $button-text-icon-mini-margin-left;
      } 
      &-right {
        margin-right: $button-text-icon-mini-margin-left;
      }
    }
    .text {
      margin-left: $button-text-icon-mini-margin-left;
    }
    &.nut-button--icon {
      padding: $button-mini-icon-default-padding;
    }
  }

  &--block {
    display: block;
    width: 100%;
  }

  &--disabled {
    cursor: not-allowed;
    opacity: $button-disabled-opacity;
    // $nsui-function-color-brand3
    &.nut-button--default {
      opacity: 1;
      border-color: $button-normal-disabled-border-color;
      color: $button-normal-disabled-color;
      &.nut-button--none {
        border: none;
      }
    }
    &.nut-button--primary {
      background: $button-primary-disabled-background-color;
      opacity: 1;
      &.nut-button--none {
        border: none;
        background: transparent;
        color: $button-primary-disabled-outline-color;
      }
      &.nut-button--plain {
        background: $button-primary-plain-background-color;
        color: $button-primary-disabled-plain-color;
      }
      &.nut-button--outline {
        color: $button-primary-disabled-outline-color;
        border-color: $button-primary-disabled-outline-border-color;
        background: transparent;
        // $nsui-gray4
      }
    }
  }

  &--loading {
    cursor: default;
    opacity: 0.9;
  }

  &--round {
    border-radius: $button-border-radius;
  }
  &--square {
    border-radius: 0;
  }
}