Readlebee/app/styles/picnic-customizations/_custom.scss

// Picnic Overrides
body {
  font-family: BlinkMacSystemFont, -apple-system, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", "Helvetica", "Arial", sans-serif;
}

a {
  color: $picnic-info;

  &:not(.button) {
    &:hover,
    &:active,
    &:focus {
      color: darken($picnic-info, 10);
    }
  }
}

nav {
  position: relative;
}

// For some reason, hidden is not important by default!
[hidden] {
  display: none !important;
}

.pseudo[data-tooltip]::after {
  background-color: $picnic-black;
  color: $picnic-white;
}

.modal {
  position: absolute; // Prevent modal partial from interrupting content flow.
}

// External links
a[href^="http://"]:after,
a[href^="https://"]:after{
  font-family: "icons";
  font-size: 70%;
  vertical-align: top;
  margin-left: 3px;
  content: "\f08e";
}

// New components
.menu ul li {
  display: inline-block;
  list-style: none;
}

footer nav {
  .links {
    @extend .brand;
    font-weight: unset;
  }
}

.container {
  display: block;
  width: 75%;
  max-width: 900px;
  min-width: 560px;
  margin: 0 auto;
  padding: $picnic-separation 0;

  &.wide {
    width: 100%;
    padding: $picnic-separation;
  }
}

.title + .subtitle {
  margin-top: -2 * $picnic-separation;
  padding-top: 0;
  font-size: 0.8em;
  line-height: 1.2em;
  font-weight: normal;
}

.content {
  padding: $picnic-separation;
  font-size: 90%;

  p {
    margin: 0 0 $picnic-separation;
  }

  h1, h2, h3, h4, h5, h6 {
    padding: 0.4em 0 0.1em;
  }
  h1 {
    font-size: 1.6em;
  }
  h2 {
    font-size: 1.45em;
  }
  h3 {
    font-size: 1.3em;
  }
  h4 {
    font-size: 1.15em;
  }
  h5 {
    font-size: 1.05em;
  }
  h6 {
    font-size: 0.95em;
  }
}

.sub-stack {
  @extend .stack;
  width: 90%;
  min-width: unset;
  margin: 0 0 0 auto;
}

.card {
  &.info {
    background: $picnic-info;
    color: $picnic-white;

    * {
      color: $picnic-white;
    }
  }
  &.success {
    background: $picnic-success;
    color: $picnic-white;

    * {
      color: $picnic-white;
    }
  }
  &.warning {
    background: $picnic-warning;
    color: $picnic-white;

    * {
      color: $picnic-white;
    }
  }
  &.error {
    background: $picnic-error;
    color: $picnic-white;

    * {
      color: $picnic-white;
    }
  }
}

.background-dull {
  background: $picnic-dull;
}
.background-light {
  background: $picnic-light;
}

th {
  background: $picnic-dull;
  * {
    color: $picnic-white;
  }
}
.light th {
  background: $picnic-light;
  color: $picnic-black;

  * {
    color: $picnic-black;
  }
}

// Handy Utilities
.marginless {
  margin: 0 !important;
}
.paddingless {
  padding: 0 !important;
}
.inline {
  display: inline !important;
}
.italic {
  font-style: italic !important;
}
.large {
  font-size: 1.5em;
}
.small {
  font-size: 0.8em;
}
.left-align {
  text-align: left !important;
}
.right-align {
  text-align: right !important;
}
.center-align {
  text-align: center !important;
}
.clear {
  clear: both;
}
.pull-left {
  float: left;
}
.pull-right {
  float: right;
}

@media (max-width: 960px) {
  .menu ul li {
    display: block;
  }
}

@media (max-width: 599px) {
  .container {
    width: 98%;
    min-width: unset;
  }
  .brand {
    font-size: 75%;
  }
}

@media (min-width: 599px) {
  .left-align-desktop {
    text-align: left;
  }
  .right-align-desktop {
    text-align: right;
  }
  .center-align-desktop {
    text-align: center;
  }
  .pull-left-desktop {
    float: left;
  }
  .pull-right-desktop {
    float: right;
  }
}