/* Reset, typography and links */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--color-bg);
}

body {
  margin: 0 auto;
  max-width: var(--max-width);
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: 400;
  line-height: var(--line-height-base);
  text-rendering: geometricPrecision;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--color-selection);
}

/* ---------- Headings ---------- */

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  line-height: var(--line-height-base);
}

h1 {
  font-size: 1.5em;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: .01em;
}

h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-heading);
  letter-spacing: normal;
}

h3 {
  font-size: .9rem;
  font-weight: 700;
  color: var(--color-heading);
  text-decoration: underline;
  text-decoration-color: var(--color-muted);
  text-underline-offset: 3px;
}

h4, h5, h6 {
  font-size: .8rem;
  font-weight: 400;
  color: var(--color-secondary);
}

/* ---------- Text ---------- */

p {
  margin: 0 0 1rem;
}

strong {
  font-weight: 700;
  color: var(--color-heading);
}

small {
  font-size: .85em;
}

ul, ol, dl {
  line-height: var(--line-height-base);
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

li {
  margin-bottom: .25rem;
}

hr {
  border: 0;
  border-top: thin solid var(--color-muted);
  margin: 2rem 0;
}

code {
  font-family: var(--font-body);
  font-size: 13px;
  background: var(--color-inline-bg);
  border-radius: var(--radius-sm);
  padding: 0 4px;
  line-height: 22px;
}

pre code {
  font-family: var(--font-code);
}

@media (min-width: 480px) {
  p {
    text-align: justify;
  }
}

/* ---------- Links (6px gradient underline) ---------- */

a {
  color: var(--color-text);
  text-decoration: none;
}

a:hover {
  color: var(--color-hover);
}

.content a {
  background-image: linear-gradient(transparent, transparent 5px, var(--color-text) 5px, var(--color-text));
  background-position: bottom;
  background-repeat: repeat-x;
  background-size: 100% 6px;
}

.content a:hover {
  background-image: linear-gradient(transparent, transparent 4px, var(--color-hover) 4px, var(--color-hover));
}

/* ---------- Helpers ---------- */

.muted {
  color: var(--color-muted);
}

.subtitle {
  color: var(--color-muted);
  font-size: 1.2em;
  margin: -4px 0 1rem;
}