:root {
  --text: #1f1f1f;
  --body-text: #333;
  --muted: #777;
  --faint: #9a9a9a;
  --line: #e6e6e6;
  --accent: #4ca66a;
  --bg: #ffffff;
  --shell: 960px;
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.site-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: min(calc(100% - 64px), var(--shell));
  margin: 0 auto;
}

main {
  flex: 1;
}

/* Header */

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px 32px;
  padding-top: 30px;
  margin-bottom: 76px;
}

.site-title {
  font-family: ui-serif, Georgia, "Times New Roman", serif;
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-decoration: none;
  color: var(--text);
}

.site-nav {
  display: flex;
  gap: 28px;
  font-size: 17px;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--accent);
  border-bottom-color: currentColor;
}

/* Home */

.tagline {
  margin: 0 0 84px;
  text-align: center;
  font-size: 21px;
  line-height: 1.5;
  color: #6a6a6a;
  letter-spacing: 0.01em;
}

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

.post-item {
  padding: 26px 0 24px;
  border-bottom: 1px solid var(--line);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 12px;
}

.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  background: #f2f2f2;
  color: #777;
  font-size: 12.5px;
  letter-spacing: 0.02em;
}

.post-title {
  display: inline-block;
  font-size: 22px;
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
  transition: color 0.15s ease;
}

.post-title:hover {
  color: var(--accent);
}

.post-summary {
  margin: 12px 0 0;
  font-size: 17px;
  line-height: 1.65;
  color: #555;
}

.post-date {
  margin: 14px 0 0;
  text-align: right;
  font-size: 13px;
  color: var(--faint);
}

.empty-state {
  margin: 0;
  padding: 60px 0;
  text-align: center;
  font-size: 17px;
  color: var(--faint);
  letter-spacing: 0.02em;
}

/* Pages and posts */

.page-title,
.post-heading {
  margin: 0 0 34px;
  font-size: 30px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.post-header {
  margin-bottom: 38px;
}

.post-heading {
  margin-bottom: 14px;
}

.post-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  font-size: 13.5px;
  color: var(--faint);
}

.prose {
  font-size: 17px;
  line-height: 1.8;
  color: var(--body-text);
}

.prose > *:first-child {
  margin-top: 0;
}

.prose p {
  margin: 0 0 1.4em;
}

.prose h2 {
  margin: 2.1em 0 0.7em;
  font-size: 22px;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.prose h3 {
  margin: 1.8em 0 0.6em;
  font-size: 18px;
  line-height: 1.4;
}

.prose ul,
.prose ol {
  margin: 0 0 1.4em;
  padding-left: 1.3em;
}

.prose li {
  margin: 0.35em 0;
}

.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.prose blockquote {
  margin: 0 0 1.4em;
  padding-left: 18px;
  border-left: 2px solid var(--line);
  color: #555;
}

.prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: #f5f5f5;
  padding: 0.12em 0.35em;
  border-radius: 3px;
}

.prose pre {
  overflow-x: auto;
  padding: 16px;
  border-radius: 5px;
  background: #f7f7f7;
}

.prose pre code {
  background: none;
  padding: 0;
}

.prose img {
  max-width: 100%;
  height: auto;
}

/* Tags index */

.tag-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag-index-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tag-count {
  font-size: 12px;
  color: var(--faint);
}

.empty-state-link {
  margin: 0;
  text-align: center;
  font-size: 15px;
}

.empty-state-link a {
  color: var(--accent);
  text-decoration: none;
}

/* Footer */

.site-footer {
  margin-top: 88px;
  padding: 36px 0 30px;
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
  font-size: 13px;
  color: var(--faint);
}

/* Mobile */

@media (max-width: 720px) {
  .site-shell {
    width: calc(100% - 40px);
  }

  .site-header {
    padding-top: 20px;
    margin-bottom: 48px;
    gap: 14px 20px;
  }

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

  .site-nav {
    gap: 18px;
    font-size: 15px;
  }

  .tagline {
    margin-bottom: 52px;
    font-size: 16px;
  }

  .post-item {
    padding: 20px 0 18px;
  }

  .post-title {
    font-size: 18px;
  }

  .post-summary {
    font-size: 15px;
  }

  .post-date {
    font-size: 12px;
  }

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

  .prose {
    font-size: 16px;
    line-height: 1.75;
  }

  .prose h2 {
    font-size: 19px;
  }

  .site-footer {
    margin-top: 64px;
  }

  .site-footer p {
    font-size: 12px;
  }
}