:root {
  --bg: #faf9f7;
  --text: #1c1c1c;
  --muted: #6b6b68;
  --rule: #e5e3df;
  --code-bg: #f2f1ee;
  --max: 720px;
  --sans: "Avenir Next", Avenir, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* Base */

* {
  box-sizing: border-box;
}

html {
  font-size: 18px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.65;
  letter-spacing: -0.006em;
}

.site {
  width: min(calc(100% - 40px), var(--max));
  margin: 64px auto 96px;
}

/* Header */

header {
  margin-bottom: 56px;
}

.site-title {
  margin: 0 0 8px;
  font-size: 2rem;
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.035em;
}

.tagline {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}

/* Navigation */

nav {
  margin-top: 18px;
  font-family: var(--sans);
  font-size: 0.94rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}

nav a {
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

nav a + a::before {
  content: " · ";
  color: var(--muted);
  text-decoration: none;
  padding: 0 0.15rem;
}

/* Links */

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  text-decoration-thickness: 2px;
}

/* Typography */

h1,
h2,
h3 {
  line-height: 1.15;
  margin: 0;
  font-family: var(--sans);
  font-weight: 700;
}

h1 {
  font-size: 2.35rem;
  margin-bottom: 14px;
  letter-spacing: -0.04em;
}

h2 {
  font-size: 1.55rem;
  margin-top: 2.6em;
  margin-bottom: 0.75em;
  letter-spacing: -0.03em;
}

h3 {
  font-size: 1.2rem;
  margin-top: 2em;
  letter-spacing: -0.02em;
}

p {
  margin: 0 0 1.15em;
}

/* Article */

article p {
  margin-bottom: 1.4rem;
}

article h2 {
  margin-top: 3.5rem;
  margin-bottom: 1.25rem;
}

.deck {
  font-size: 1.12rem;
  line-height: 1.55;
  color: #444;
  margin-bottom: 0.8rem;
  font-weight: 400;
  letter-spacing: -0.012em;
}

.meta {
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.82rem;
  margin-bottom: 3rem;
  letter-spacing: 0;
}

/* Homepage / Writing index */

.section-title {
  font-size: 1.35rem;
  margin-bottom: 1rem;
  letter-spacing: -0.025em;
}

.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.post-list li {
  margin-bottom: 1.6rem;
}

.post-list a {
  font-family: var(--sans);
  font-size: 1.08rem;
  line-height: 1.4;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.post-date {
  display: block;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.8rem;
  margin-top: 0.15rem;
  letter-spacing: 0;
}

/* Project links */

.project-link {
  margin-top: 1.75rem;
  margin-bottom: 3.5rem;
}

/* Callouts */

.callout {
  border-left: 3px solid var(--text);
  padding-left: 1rem;
  margin: 1.8rem 0;
}

/* Architecture / lifecycle */

.lifecycle {
  font-family: var(--mono);
  font-size: 0.92rem;
  line-height: 1.7;
  background: var(--code-bg);
  padding: 1rem;
  overflow-x: auto;
  border-radius: 3px;
  margin: 1.5rem 0;
  letter-spacing: 0;
}

/* Lists */

.question-list {
  margin: 1.25rem 0 1.75rem;
  padding-left: 1.2rem;
}

.question-list li {
  margin: 0.35rem 0;
}

/* Code */

code,
pre {
  font-family: var(--mono);
  letter-spacing: 0;
}

pre {
  background: var(--code-bg);
  padding: 1rem;
  overflow-x: auto;
  line-height: 1.5;
}

/* Dividers */

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 3.5rem 0;
}

/* Footer */

footer {
  border-top: 1px solid var(--rule);
  margin-top: 4rem;
  padding-top: 1rem;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0;
}

/* Mobile */

@media (max-width: 640px) {
  html {
    font-size: 17px;
  }

  .site {
    margin-top: 36px;
  }

  header {
    margin-bottom: 40px;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.45rem;
  }
}