metamask-extension/ui/app/css/base-styles.scss

* {
  box-sizing: border-box;
}

html,
body {
  color: #4d4d4d;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  font-size: 16px;
  overflow: auto;
}

html {
  min-height: 500px;
}

.mouse-user-styles {
  button:focus,
  input:focus,
  textarea:focus,
  .unit-input__input,
  .currency-display__input {
    outline: none;
  }
}

/* stylelint-disable */
#app-content {
  overflow-x: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  background: #f7f7f7;

  @media screen and (max-width: $break-small) {
    background-color: $white;
  }
}
/* stylelint-enable */

a {
  text-decoration: none;
  color: inherit;
}

a:hover {
  color: #df6b0e;
}

input.large-input,
textarea.large-input {
  padding: 8px;
}

input.large-input {
  height: 36px;
}

.allcaps {
  text-transform: uppercase;
}

.input-label {
  padding-bottom: 10px;
  font-weight: 400;
  display: inline-block;
}

input.form-control {
  padding-left: 10px;
  font-size: 14px;
  height: 40px;
  border: 1px solid $alto;
  border-radius: 3px;
  width: 100%;

  &::-webkit-input-placeholder {
    font-weight: 100;
    color: $dusty-gray;
  }

  &::-moz-placeholder {
    font-weight: 100;
    color: $dusty-gray;
  }

  &:-ms-input-placeholder {
    font-weight: 100;
    color: $dusty-gray;
  }

  &:-moz-placeholder {
    font-weight: 100;
    color: $dusty-gray;
  }

  &--error {
    border: 1px solid $monzo;
  }
}

/** Default Typography on base elements **/
* {
  font-family: $font-family;
}