styles.css

/* Elements */

* {
  position: relative;
  box-sizing: border-box;
  letter-spacing: calc(0.03rem - 0.03em);
}

body {
  margin: 0;
  padding: 0;
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    Helvetica Neue,
    Helvetica,
    Segoe UI,
    sans-serif,
    Apple Color Emoji,
    Segoe UI Emoji;
  line-height: 1.5;
  font-size: 0.95em;
}

table {
  width: 100%;
  line-height: 1.35;
  border-spacing: 0;
}
thead {
  font-size: 1.5em;
  text-align: left;
}
tr {
  vertical-align: top;
}
th {
  padding-bottom: 2rem;
}
td {
  padding: 1.5rem 0;
  border-top: 1px solid #ccc;
}
table p:not(:first-child) {
  margin-top: 0;
}

pre,
code {
  font-family: Menlo, Consolas, monospace;
}
pre {
  margin: -0.3rem 0;
  margin-left: -1rem;
  padding: 0.3rem 1rem;
  background: #eef;
  overflow-x: auto;
}
code {
  padding: 0 0.1em;
  color: #014;
}
pre code {
  padding: 0;
}

p {
  max-width: 36em;
  overflow-x: auto;
}

a {
  color: #05e;
}
a:hover,
a:focus {
  background: rgba(0, 85, 238, 0.1);
}

h1 { font-size: 2.4em; }
h2 { font-size: 1.9em; }
h3 { font-size: 1.55em; }
h4 { font-size: 1.35em; }
h5 { font-size: 1.15em; }
h6 { font-size: 1em; }

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1;
}

h1,
h2,
h3,
h4,
h5,
h6,
p {
  margin: 0;
}

a {
  color: #00F;
}

a:visited {
  color: #80F;
}

h1:not(:first-child),
h2:not(:first-child),
h3:not(:first-child),
h4:not(:first-child),
h5:not(:first-child),
h6:not(:first-child),
p:not(:first-child) {
  margin-top: calc(1rem + 0.6em);
}

h1::after,
h1::before,
h2::after,
h2::before,
h3::after,
h3::before,
h4::after,
h4::before,
h5::after,
h5::before,
h6::after,
h6::before {
  content: '';
  display: block;
}
h1::before,
h2::before,
h3::before,
h4::before,
h5::before,
h6::before {
  margin-top: -0.1em;
}
h1::after,
h2::after,
h3::after,
h4::after,
h5::after,
h6::after {
  margin-bottom: -0.1em;
}

/* Components */

.section {
  padding: 4rem 2rem;
}
.section__content {
  margin: 0 auto;
  max-width: 60rem;
}
.section__content--wide {
  max-width: 80rem;
}

.intro {
  padding: 4rem 2rem;
  overflow: hidden;
}
.intro::before {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  bottom: 20rem;
  background: #9cf;
  z-index: -1;
}
.intro .section__content {
  padding: 4rem;
  background: #fff;
  box-shadow: -1rem 1rem 0 0 rgba(0, 0, 0, 0.1);
}
.intro .section__content::after {
  content: '';
  position: absolute;
  top: 3rem;
  right: -3rem;
  bottom: -3rem;
  left: 3rem;
  z-index: -1;

  opacity: 0.6;
  mix-blend-mode: multiply;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    #fff 2px,
    #fff 10px
  ), repeating-linear-gradient(
    -90deg,
    #000,
    #000 2px,
    #fff 2px,
    #fff 10px
  );
}

.footer {
  padding: 4rem 2rem 3rem;
  overflow: hidden;
}
.footer .section__content {
  padding: 4rem;
  background: #fff;
}
.footer .section__content::before {
  content: '';
  display: block;
  position: absolute;
  top: -2rem;
  right: 2rem;
  left: -2rem;
  bottom: 2rem;

  mix-blend-mode: screen;
  background: repeating-linear-gradient(
    135deg,
    #014,
    #014 7px,
    transparent 7px,
    transparent 9.8995px
  ), repeating-linear-gradient(
    #014,
    #014 5px,
    transparent 5px,
    transparent 7px
  ), repeating-linear-gradient(
    90deg,
    #014,
    #014 5px,
    #fff 5px,
    #fff 7px
  );
}
.footer .section__content::after {
  content: '';
  display: block;
  position: absolute;
  top: -4rem;
  left: 16rem;
  bottom: -3rem;
  width: 100vw;
  background: #9da;
  z-index: -1;
}

.language__title--row td {
  padding-bottom: 0;
}
.language__title--cell {
  padding-top: 1.4rem;
}
.language__name {
  font-size: 1.3em;
  font-weight: 600;
}
.language__name::before {
  content: '';
  display: block;
  position: absolute;
  top: -0.3em;
  right: -0.5em;
  bottom: -0.5em;
  left: -1.5em;
}
.language__name:hover .language__name-link,
.language__name:focus .language__name-link {
  opacity: 1;
}
.language__name-link {
  position: absolute;
  left: -1.7em;
  top: 0.1em;
  font-size: 1rem;
  text-decoration: none;
  opacity: 0;
}
.language__name-link:hover,
.language__name-link:focus {
  background: none;
}
.language__result pre {
  background: #dfd;
}
.language__result code {
  color: #240;
}

.and {
  font-variant: small-caps;
  padding: 0.3em 0;
  text-shadow:
    -0.16em 0 #fff,
    -0.08em 0 #fff,
    0.08em 0 #fff,
    0.16em 0 #fff,
    0.24em 0 #fff,
    0.32em 0 #fff,
    0.4em 0 #fff,
    0.48em 0 #fff;
}
.and::after {
  content: '';
  display: block;
  position: absolute;
  left: 0;
  right: 0;
  top: 0.95em;
  border-top: 1px dotted rgba(0, 0, 0, 0.2);
  z-index: -1;
}

.comment {
  font-size: 0.9em;
  color: #666;
  border-top: none;
  padding: 0 0 1.5rem;
}
.comment p {
  max-width: none;
}
.comment p:not(:first-child) {
  margin-top: calc(0.4rem + 0.4em);
}

@media (min-width: 60em) {
  th:not(:first-child),
  td:not(:first-child) {
    padding-left: 2rem;
    max-width: 20em;
  }

  .language__title--row {
    display: none;
  }

  .intro {
    padding-top: 6rem;
  }
}

@media (max-width: 60em) {
  tr:not(.language__title) td {
    border: none;
  }

  .table__heading:first-child,
  .language__title--cell {
    display: none;
  }
}

@media (max-width: 60em) and (min-width: 40em) {
  tr:not(.language__title) td {
    max-width: calc(50vw - 3rem);
  }

  th:nth-child(2),
  td:nth-child(2) {
    padding-left: 0;
    padding-right: 1rem;
  }

  th:nth-child(3),
  td:nth-child(3) {
    padding-left: 1rem;
  }
}

@media (max-width: 40em) {
  thead {
    display: none;
  }

  table,
  tbody,
  tr,
  td,
  th {
    display: block;
  }

  pre {
    margin-right: -1rem;
  }

  .intro .section__content,
  .footer .section__content {
    padding: 2rem;
  }
  .footer .section__content::after {
    left: 8rem;
  }

  .language__result {
    padding-top: 0;
  }
  .language__name-link {
    opacity: 0.5;
  }
}

@media (max-width: 20em) {
  :root {
    font-size: 0.85em;
  }
}