*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #0f0f0f;
  --text: #d1d1d1;
  --muted: #6b6b6b;
  --sep: #1e1e1e;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: 'Heebo', sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

a:hover {
  color: #fff;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Nav */
.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  font-size: 16px;
  color: var(--text);
  text-decoration: none;
}

.nav-brand:hover {
  text-decoration: none;
  color: #fff;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-weight: 700;
}

.brand-mark {
  height: 22px;
  width: auto;
  flex-shrink: 0;
  display: block;
}

.brand-name {
  line-height: 1;
  word-spacing: -0.16em;
}

.nav-sep {
  color: var(--muted);
  margin: 0 6px;
}

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

.nav-links {
  list-style: none;
  display: flex;
  gap: 20px;
}

.nav-links a {
  font-size: 15px;
  color: var(--text);
  text-decoration: none;
}

.nav-links a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.divider {
  border: none;
  border-top: 1px solid var(--sep);
}

/* Main */
main {
  padding-top: 72px;
  padding-bottom: 80px;
}

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

/* Home */
.page-tagline {
  font-size: 16px;
  font-weight: 400;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.intro {
  margin-bottom: 52px;
}

.section-label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 14px;
}

.posts-list {
  list-style: none;
}

.posts-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 6px 0;
}

.post-date {
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
  flex-shrink: 0;
}

/* Post page */
.post-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 10px;
  color: var(--text);
}

.post-meta {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 52px;
}

.post-body p {
  margin-bottom: 1.5em;
}

.post-body p:last-child {
  margin-bottom: 0;
}

/* Post body rich elements */
.post-body h2 {
  font-size: 19px;
  font-weight: 700;
  margin-top: 2.25em;
  margin-bottom: 0.75em;
  color: var(--text);
}

.post-body ul {
  padding-right: 1.25em;
  margin-bottom: 1.5em;
}

.post-body ul li {
  margin-bottom: 0.75em;
}

.post-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5em;
  font-size: 14px;
}

.post-body th {
  text-align: right;
  padding: 8px 0;
  border-bottom: 1px solid var(--sep);
  font-size: 13px;
  font-weight: 400;
  color: var(--muted);
}

.post-body td {
  text-align: right;
  padding: 8px 0;
  border-bottom: 1px solid var(--sep);
}

/* Post summary (direct answer) */
.post-summary {
  border-right: 2px solid var(--muted);
  padding: 4px 16px 4px 0;
  margin-bottom: 2.5em;
  color: var(--text);
}

.post-summary .summary-label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

.post-summary p {
  margin-bottom: 0;
}

/* Post FAQ */
.post-faq {
  margin-top: 3em;
  padding-top: 2em;
  border-top: 1px solid var(--sep);
}

.post-faq h2 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 1.25em;
  color: var(--text);
}

.post-faq .faq-q {
  font-weight: 700;
  margin-bottom: 0.4em;
  color: var(--text);
}

.post-faq .faq-a {
  margin-bottom: 1.75em;
  color: var(--text);
}

.post-faq .faq-a:last-child {
  margin-bottom: 0;
}

/* Post author byline */
.post-author {
  margin-top: 2.5em;
  padding-top: 1.5em;
  border-top: 1px solid var(--sep);
  font-size: 14px;
  color: var(--muted);
}

/* Footer */
footer {
  border-top: 1px solid var(--sep);
  padding-top: 32px;
  padding-bottom: 40px;
  font-size: 14px;
  color: var(--muted);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 24px;
  font-size: 14px;
  font-weight: 700;
  color: var(--muted);
  word-spacing: -0.16em;
}

.footer-mark {
  height: 17px;
}

/* Mobile */
@media (max-width: 480px) {
  .posts-list li {
    flex-direction: column;
    gap: 2px;
    padding: 8px 0;
  }

  .post-title {
    font-size: 24px;
  }

  main {
    padding-top: 48px;
  }
}