metamask-extension/ui/app/css/itcss/generic/index.scss

/*
  Generic
 */

@import './reset.scss';

* {
  box-sizing: border-box;
}

html,
body {
  font-family: Roboto, Arial;
  color: #4d4d4d;
  font-weight: 300;
  line-height: 1.4em;
  background: #f7f7f7;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

html {
  min-height: 500px;
}

.app-root {
  overflow: hidden;
  position: relative;
}

.app-primary {
  display: flex;
}

input:focus,
textarea:focus {
  outline: none;
}

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

  @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;
}

.page-container {
  width: 400px;
  background-color: $white;
  box-shadow: 0 0 7px 0 rgba(0, 0, 0, .08);
  z-index: 25;
  display: flex;
  flex-flow: column;

  &__header {
    display: flex;
    flex-flow: column;
    border-bottom: 1px solid $geyser;
    padding: 1.6rem 1rem;
    flex: 0 0 auto;
  }

  &__footer {
    display: flex;
    flex-flow: row;
    justify-content: center;
    border-top: 1px solid $geyser;
    padding: 1.6rem;
    flex: 0 0 auto;
  }

  &__footer-button {
    width: 165px;
    height: 60px;
    font-size: 1rem;
    text-transform: uppercase;
    margin-right: 1rem;

    &:last-of-type {
      margin-right: 0;
    }
  }

  &__title {
    color: $tundora;
    font-family: Roboto;
    font-size: 2rem;
    font-weight: 500;
    line-height: initial;
  }

  &__subtitle {
    padding-top: .5rem;
    line-height: initial;
    font-size: .9rem;
  }

  &__tabs {
    padding: 0 1.3rem;
    display: flex;
  }

  &__tab {
    min-width: 5rem;
    padding: .2rem .8rem .9rem;
    color: $dusty-gray;
    font-family: Roboto;
    font-size: 1.1rem;
    line-height: initial;
    text-align: center;
    cursor: pointer;
    border-bottom: none;
    margin-right: 1rem;

    &:hover {
      color: $black;
    }

    &:last-of-type {
      margin-right: 0;
    }

    &--selected {
      color: $curious-blue;
      border-bottom: 3px solid $curious-blue;

      &:hover {
        color: $curious-blue;
      }
    }
  }
}

@media screen and (max-width: 250px) {
  .page-container {
    &__footer {
      flex-flow: column-reverse;
    }

    &__footer-button {
      width: 100%;
      margin-bottom: 1rem;
      margin-right: 0;

      &:first-of-type {
        margin-bottom: 0;
      }
    }
  }
}

@media screen and (max-width: 575px) {
  .page-container {
    height: 100%;
    width: 100%;
    overflow-y: auto;
    background-color: $white;
  }
}