sergio.am/_sass/klise/_base.scss

// Reset some basic elements
* {
  -webkit-transition: background-color 75ms ease-in, border-color 75ms ease-in;
  -moz-transition: background-color 75ms ease-in, border-color 75ms ease-in;
  -ms-transition: background-color 75ms ease-in, border-color 75ms ease-in;
  -o-transition: background-color 75ms ease-in, border-color 75ms ease-in;
  transition: background-color 75ms ease-in, border-color 75ms ease-in;
}

.notransition {
  -webkit-transition: none;
  -moz-transition: none; 
  -ms-transition: none;
  -o-transition: none;
  transition: none;
}

html {
  overflow-x: hidden;
  width: 100%;
}

body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
hr,
dl,
dd,
ol,
ul,
figure {
  margin: 0;
  padding: 0;
}

// Basic styling
body {
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  color: $text-base-color;
  background-color: $white;
  font: $normal-weight #{$base-font-size}/#{$base-line-height} $sans-family;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -webkit-font-feature-settings: "kern" 1;
  -moz-font-feature-settings: "kern" 1;
  -o-font-feature-settings: "kern" 1;
  font-feature-settings: "kern" 1;
  font-kerning: normal;
  box-sizing: border-box;
}

// Set `margin-bottom` to maintain vertical rhythm
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
ul,
ol,
dl,
figure,
%vertical-rhythm {
  margin-top: $spacing-full - 20;
  margin-bottom: $spacing-full - 20;
}

// strong | bold
strong,
b {
  font-weight: $bold-weight;
  color: $black;
}

// horizontal rule
hr {
  border-bottom: 0;
  border-style: solid;
  border-color: $light;
}

// kbd tag
kbd {
  -moz-border-radius: 3px;
  -webkit-border-radius: 3px;
  border: 1px solid $light;
  border-radius: 2px;
  color: $black;
  display: inline-block;
  font-size: $small-font-size;
  line-height: 1.4;
  font-family: $mono-family;
  margin: 0 0.1em;
  font-weight: $bold-weight;
  padding: 0.01em 0.4em;
  text-shadow: 0 1px 0 $white;
}

// Image
img {
  max-width: 100%;
  vertical-align: middle;
  -webkit-user-drag: none;
  margin: 0 auto;
  text-align: center;
}

// Figure
figure {
  position: relative;
}

// Image inside Figure tag
figure > img {
  display: block;
  position: relative;
}

// Image caption
figcaption {
  font-size: 13px;
  text-align: center;
}

// List
ul {
  list-style: none;
  li {
    display: list-item;
    text-align: -webkit-match-parent;
  }
  li::before {
    content: "\FE63";
    display: inline-block;
    top: -1px;
    width: 1.2em;
    position: relative;
    margin-left: -1.3em;
    font-weight: 700;
  }
}

ol {
  list-style: none;
  counter-reset: li;
  li {
    position: relative;
    counter-increment: li;
    &::before {
      content: counter(li);
      display: inline-block;
      width: 1em;
      margin-right: 0.5em;
      margin-left: -1.6em;
      text-align: right;
      direction: rtl;
      font-weight: $bold-weight;
      font-size: $small-font-size;
    }
  }
}

ul,
ol {
  margin-top: 0;
  margin-left: $spacing-full;
}

li {
  padding-bottom: 1px;
  padding-top: 1px;

  &:before {
    color: $black;
  }

  > ul,
  > ol {
    margin-bottom: 2px;
    margin-top: 0;
  }
}

// Headings
h1,
h2,
h3,
h4,
h5,
h6 {
  color: $black;
  font-weight: $bold-weight;
  & + ul,
  & + ol {
    margin-top: 10px;
  }

  @include media-query($on-mobile) {
    scroll-margin-top: 65px;
  }
}

// Headings with link
h1 > a,
h2 > a,
h3 > a,
h4 > a,
h5 > a,
h6 > a {
  text-decoration: none;
  border: none;

  &:hover {
    text-decoration: none;
    border: none;
  }
}

// Link
a {
  color: inherit;
  text-decoration-color: $smoke;

  &:hover {
    color: $text-link-blue;
  }

  &:focus {
    outline: 3px solid rgba(0, 54, 199, 0.6);
    outline-offset: 2px;
  }
}

// Del
del {
  color: inherit;
}

// Em
em {
  color: inherit;
}

// Blockquotes
blockquote {
  color: $gray;
  font-style: italic;
  text-align: center;
  opacity: 0.9;
  border-top: 1px solid $light;
  border-bottom: 1px solid $light;
  padding: 10px;
  margin-left: 10px;
  margin-right: 10px;
  font-size: 1em;

  > :last-child {
    margin-bottom: 0;
    margin-top: 0;
  }
}

// Wrapper
.wrapper {
  max-width: -webkit-calc(#{$narrow-size} - (#{$spacing-full} * 2));
  max-width: calc(#{$narrow-size} - (#{$spacing-full} * 2));
  position: relative;
  margin-right: auto;
  margin-left: auto;
  padding-right: $spacing-full;
  padding-left: $spacing-full;
  @extend %clearfix;

  @include media-query($on-mobile) {
    max-width: -webkit-calc(#{$narrow-size} - (#{$spacing-full}));
    max-width: calc(#{$narrow-size} - (#{$spacing-full}));
    padding-right: $spacing-full - 10;
    padding-left: $spacing-full - 10;

    &.blurry {
      animation: 0.2s ease-in forwards blur;
      -webkit-animation: 0.2s ease-in forwards blur;
    }
  }
}

// Underline
u {
  text-decoration-color: #d2c7c7;
}

// Small
small {
  font-size: $small-font-size;
}

// Superscript
sup {
  border-radius: 10%;
  top: -3px;
  left: 2px;
  font-size: small;
  position: relative;
  margin-right: 2px;
}

// Table
.overflow-table {
  overflow-x: auto;
}

table {
  width: 100%;
  margin-top: $spacing-half;
  border-collapse: collapse;
  font-size: $small-font-size;

  thead {
    font-weight: $bold-weight;
    color: $black;
    border-bottom: 1px solid $light;
  }

  th,
  td,
  tr {
    border: 1px solid $light;
    padding: 2px 7px;
  }
}

// Clearfix
%clearfix:after {
  content: "";
  display: table;
  clear: both;
}

// When mouse block a text set this color
mark,
::selection {
  background: #fffba0;
  color: $black;
}

// Github Gist clear border
.gist {
  table {
    border: 0;

    tr,
    td {
      border: 0;
    }
  }
}