:root {
  color-scheme: light;
  color: #111;
  background: #fff;
  font-family: Arial, Helvetica, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  max-width: 42rem;
  min-height: 100vh;
  margin: 0 auto;
  padding: 0 1.25rem;
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: inherit;
  text-underline-offset: 0.18em;
}

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

a:focus-visible {
  outline: 2px solid #111;
  outline-offset: 3px;
}

.site-header {
  display: flex;
  justify-content: space-between;
  padding: 2rem 0;
}

.site-header a {
  font-size: 0.9rem;
}

.site-name {
  font-weight: 700;
  text-decoration: none;
}

main {
  padding: 5rem 0 8rem;
}

h1 {
  margin: 0 0 3rem;
  font-size: clamp(2rem, 7vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.post-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid #111;
}

.post-list li {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding: 1rem 0;
  border-bottom: 1px solid #ddd;
}

.post-list time,
.article-header time {
  color: #666;
  font-size: 0.85rem;
  white-space: nowrap;
}

footer {
  padding: 1.5rem 0;
  border-top: 1px solid #ddd;
  color: #666;
  font-size: 0.85rem;
}

footer p {
  margin: 0;
}

.article-header {
  margin-bottom: 3rem;
}

.article-header h1 {
  margin-bottom: 1rem;
}

.article-intro {
  margin: 0 0 1.25rem;
  color: #555;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.25rem;
  line-height: 1.5;
}

.article-figure {
  margin: 0 0 3rem;
}

.article-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid #ddd;
}

.article-figure figcaption {
  margin-top: 0.5rem;
  color: #666;
  font-size: 0.8rem;
}

.article-body {
  max-width: 38rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.15rem;
}

.article-body p {
  margin: 0 0 1.5rem;
}

.article-body h2 {
  margin: 3.5rem 0 1rem;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1.6rem;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.article-body h3 {
  margin: 2.5rem 0 0.75rem;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1.1rem;
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.5rem;
  padding-left: 1.4rem;
}

.article-body li {
  margin-bottom: 0.45rem;
}

.article-body blockquote {
  margin: 2rem 0;
  padding-left: 1.25rem;
  border-left: 2px solid #111;
  color: #444;
  font-style: italic;
}

.article-body blockquote p {
  margin: 0;
}

.article-body code {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.85em;
}

.article-body pre {
  overflow-x: auto;
  margin: 2rem 0;
  padding: 1rem;
  border: 1px solid #ddd;
  background: #f7f7f7;
  line-height: 1.5;
}

.article-body pre code {
  font-size: 0.8rem;
}

.article-body table {
  width: 100%;
  margin: 2rem 0;
  border-collapse: collapse;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.9rem;
}

.article-body th,
.article-body td {
  padding: 0.65rem 0.5rem;
  border-bottom: 1px solid #ddd;
  text-align: left;
  vertical-align: top;
}

.article-body th {
  border-bottom-color: #111;
}

.article-body hr {
  margin: 3.5rem 0;
  border: 0;
  border-top: 1px solid #ddd;
}

.back-link {
  margin-top: 4rem;
  font-size: 0.9rem;
}

@media (max-width: 32rem) {
  main {
    padding: 3rem 0 6rem;
  }

  .post-list li {
    display: block;
  }

  .post-list time {
    display: block;
    margin-top: 0.25rem;
  }
}