MyCrypto/common/sass/styles/overrides/buttons.scss

// Button overrides
@import "common/sass/variables";
@import "common/sass/mixins";

.btn {
  @include button-size(
    $padding-base-vertical,
    $padding-large-horizontal,
    $font-size-bump,
    $line-height-base,
    $btn-border-radius-base
  );
  transform: translateZ(0);
  transition: $transition;

  &:hover {
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  }

  &-link:hover {
    box-shadow: none;
  }

  // Override bootstrap disabled styles
  &:disabled,
  &.disabled,
  fieldset[disabled] & {
    opacity: 0.4;
    box-shadow: none;
    cursor: not-allowed;
  }
}

// Override sizes
.btn-lg {
  // line-height: ensure even-numbered height of button next to large input
  @include button-size(
    $padding-large-vertical,
    $padding-large-horizontal,
    $font-size-bump-more,
    $line-height-large,
    $btn-border-radius-large
  );
}
.btn-sm {
  // line-height: ensure proper height of button next to small input
  @include button-size(
    $padding-small-vertical,
    $padding-small-horizontal,
    $font-size-base,
    $line-height-base,
    $btn-border-radius-small
  );
}
.btn-xs {
  @include button-size(
    $padding-xs-vertical,
    $padding-xs-horizontal,
    $font-size-small,
    $line-height-small,
    $btn-border-radius-small
  );
  padding: .1rem .6rem .2rem;
}
// This is a "smaller" small, to accomodate overrides done in v3.
.btn-smr {
  @include button-size(
    .4rem,
    1rem,
    14px,
    $line-height-base,
    $btn-border-radius-small
  );
}

// Custom color
.btn-white {
  @include button-variant($brand-info, rgba(255,255,255,.8), rgba(255,255,255,.8));
  color: $brand-info;
}

// Custom file button
.btn-file {
  position: relative;
  overflow: hidden;

  input[type=file] {
    position: absolute;
    top: 0;
    right: 0;
    min-width: 100%;
    min-height: 100%;
    font-size: 100px;
    text-align: right;
    opacity: 0;
    background: red;
    cursor: inherit;
    display: block;
  }
}

// Contextual color overrides (?)
.alert .btn-info {
  background-color: white;
  text-decoration: none;
  color: $brand-info;
  &:hover,
  &:focus,
  &.focus {
    text-decoration: none;
    opacity: 1;
  }
  &.disabled {
    background-color: white;
    text-decoration: none;
    color: $brand-info;
    opacity: .6;
  }
}

.btn-group .btn-default {
  border-bottom-width: 1px;
  &.active {
    border: 1px solid $brand-primary;
    color: $brand-primary;
    background: #f5f5f5;
  }
}