habitica/website/client/src/assets/scss/button.scss

.btn {
  cursor: pointer;
  font-family: 'Roboto', sans-serif;
  font-size: 14px;
  font-weight: bold;
  line-height: 1.71;
  border: 1px solid transparent;
  padding: 0.219rem 0.75rem;
  border-radius: 2px;
  box-shadow: 0 1px 3px 0 rgba($black, 0.12), 0 1px 2px 0 rgba($black, 0.24);
  color: $white;

  &:hover, &:focus {
    box-shadow: 0 3px 6px 0 rgba($black, 0.16), 0 3px 6px 0 rgba($black, 0.24);

    &:disabled, &.disabled, &.btn-flat {
      box-shadow: none;
    }
  }

  &:focus {
    border-color: $purple-400;
  }

  &:active, &.active:not(.btn-flat) {
    box-shadow: none;
  }

  &:disabled, &.disabled {
    cursor: default;
    opacity: 0.75;
  }

  &.with-icon {
    height: 2rem; // otherwise would something set the height to 33px
    display: flex;
    flex-direction: row;
    align-items: center;
  }
}

.btn-front {
  font-size: 16px;
  line-height: 1.5;
  padding: 7.5px 15.5px;
}

.btn-primary {
  background: $purple-200;
  border: 1px solid transparent;
  --icon-color: #{$purple-500};

  &:focus {
    background: $purple-200;
    border-color: $purple-400;
    --icon-color: #{$white};
  }

  &:not(:disabled):not(.disabled) {
    &:hover {
      background: #5d3b9c;
      border: 1px solid transparent;

      --icon-color: #{$white};
    }

    &:active, &.active {
      background: $purple-200;
      border: 1px solid transparent;

      --icon-color: #{$white};
    }

    &:active:focus, &.active:focus {
      box-shadow: none;
      border-color: $purple-400;
    }
  }

  &:disabled, &.disabled {
    background: $gray-700;
    border: 1px solid transparent;
    cursor: default;
    color: $gray-50;

    --icon-color: #{$gray-300};
  }


  &.with-icon {
    .svg-icon.color {
      color: var(--icon-color);
    }
  }
}

.btn-secondary,
.dropdown > .btn-secondary.dropdown-toggle:not(.btn-success),
.show > .btn-secondary.dropdown-toggle:not(.btn-success)
{
  background: $white;
  border: 1px solid transparent;
  color: $gray-50;

  --icon-color: #{$gray-200};

  &:focus, &:active {
    color: $gray-50;
    background: $white;
    border-color: $purple-400;

    --icon-color: #{$purple-300};
  }

  &:not(:disabled):not(.disabled) {
    &:active, &.active {
      color: $purple-300;
      --icon-color: #{$purple-300};

      &:focus {
        color: $purple-300;
        box-shadow: none;
        border-color: $purple-400;
      }

      background: $white;
      border: 1px solid transparent;
    }

    &:hover {
      color: $purple-300;

      background: $white !important;
      border: 1px solid transparent;

      --icon-color: #{$purple-300};
    }
  }

  &:disabled, &.disabled {
    color: $gray-50;
    background: $white;
    border: 1px solid transparent;
    cursor: default;
    opacity: 0.75;

    --icon-color: #{$gray-300};
  }

  &.with-icon {
    .svg-icon.color {
      color: var(--icon-color);
    }
  }
}

.show > .btn-secondary.dropdown-toggle:not(.btn-success):not(:disabled):not(.disabled) {
  --icon-color: #{$purple-300};
}

.btn-danger {
  background: $maroon-100;
  border: 1px solid transparent;

  &:hover:not(:disabled):not(.disabled) {
    background: #e14e4e;
    border: 1px solid transparent;
  }

  &:focus {
    background: $maroon-100;
    border-color: $purple-400;
  }

  &:not(:disabled):not(.disabled):active:focus, &:not(:disabled):not(.disabled).active:focus {
    box-shadow: none;
    border-color: $purple-400;
  }

  &:not(:disabled):not(.disabled):active, &:not(:disabled):not(.disabled).active {
    background: $maroon-100;
    border: 1px solid transparent;
  }

  &:disabled, &.disabled {
    background: $maroon-100;
    border: 1px solid transparent;
    cursor: default;
    opacity: 0.75;
  }
}

.btn-success {
  background: $green-50;
  border: 1px solid transparent;

  &:hover:not(:disabled):not(.disabled) {
    background: #32bd8a;
    border: 1px solid transparent;
  }

  &:focus {
    background: $green-50;
    border-color: $purple-400;
  }

  &:not(:disabled):not(.disabled):active:focus, &:not(:disabled):not(.disabled).active:focus {
    box-shadow: none;
    border-color: $purple-400;
  }

  &:not(:disabled):not(.disabled):active, &:not(:disabled):not(.disabled).active {
    background: $green-50;
    border: 1px solid transparent;
  }

  &:disabled, &.disabled {
    background: $green-50;
    border: 1px solid transparent;
    cursor: default;
    opacity: 0.75;
  }
}

.btn-info {
  background: $blue-50;

  &:disabled {
    background: $blue-50;
  }

  &:hover:not(:disabled):not(.disabled) {
    background-color: $blue-100;
  }

  &:active:not(:disabled):not(.disabled), &.active:not(:disabled):not(.disabled) {
    background: $blue-50;
  }
}

.btn-show-more {
  display: block;
  width: 50%;
  max-width: 448px;
  margin: 0 auto;
  margin-top: 12px;
  padding: 8px;
  font-size: 14px;
  line-height: 1.43;
  font-weight: bold;
  text-align: center;
  background: $gray-600;
  color: $gray-200 !important; // Otherwise it gets ignored when used on an A element
  box-shadow: none;

  &:hover {
    box-shadow: none;
    color: inherit !important;
  }
}

.btn-flat {
  border: 0;
  box-shadow: none;
}

.btn-small {
  font-size: 12px;
  line-height: 1.33;
  padding: 4px 8px;
}