:root {
  --bg: #fff;
  --fg: #1f2328;
  --muted: #59636e;
  --line: #d1d9e0;
  --link: #0969da;
  --code-bg: #f6f8fa;
  --measure: 46rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #9198a1;
    --line: #3d444d;
    --link: #4493f8;
    --code-bg: #151b23;
  }
}

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

html {
  color-scheme: light dark;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.8;
  font-size: 16px;
}

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

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  max-width: var(--measure);
  margin: 0 auto;
  padding: 1rem;
  border-bottom: 1px solid var(--line);
}

.site-title {
  font-weight: 700;
  font-size: 1.125rem;
  text-decoration: none;
  color: var(--fg);
}

.site-search input {
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
  font-size: 0.95rem;
}

.post-list {
  display: grid;
  gap: 2rem;
}

.post-card h2 {
  margin: 0 0 0.25rem;
  font-size: 1.2rem;
  line-height: 1.5;
}

.post-card h2 a {
  text-decoration: none;
}

.post-card h2 a:hover {
  text-decoration: underline;
}

.post-card time,
.post-meta {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
}

.post-card p {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.post h1 {
  font-size: 1.75rem;
  line-height: 1.5;
  margin-bottom: 0.5rem;
}

.post-body {
  overflow-wrap: anywhere;
}

.post-body :is(h2, h3, h4) {
  margin-top: 2.5rem;
  line-height: 1.5;
  scroll-margin-top: 1rem;
}

.post-body h2 {
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--line);
}

.post-body :is(img, iframe, video) {
  max-width: 100%;
  height: auto;
}

.post-body figure {
  margin: 1.5rem 0;
}

.post-body figcaption {
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

.post-body :is(pre, .shiki) {
  padding: 1rem;
  border-radius: 6px;
  background: var(--code-bg);
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.6;
}

.post-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.post-body :not(pre) > code {
  padding: 0.15em 0.35em;
  border-radius: 4px;
  background: var(--code-bg);
  font-size: 0.9em;
}

.post-body blockquote {
  margin: 1.5rem 0;
  padding: 0.25rem 1rem;
  border-left: 3px solid var(--line);
  color: var(--muted);
}

.post-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.post-body :is(th, td) {
  padding: 0.5rem;
  border: 1px solid var(--line);
}

#ez-toc-container {
  margin: 2rem 0;
  padding: 1rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--code-bg);
  font-size: 0.9rem;
}

#ez-toc-container ul {
  margin: 0;
  padding-left: 1.2rem;
}

.post-terms {
  margin-top: 2rem;
}

.post-terms h2 {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.post-terms ul,
.term-index {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.post-terms a,
.term-index a {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.85rem;
  text-decoration: none;
}

.term-index li {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.term-count {
  color: var(--muted);
  font-size: 0.75rem;
}

.pagination,
.post-nav {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
}

.post-nav a {
  max-width: 45%;
}

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

.site-footer {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer nav {
  display: flex;
  gap: 1rem;
}

html:not(.dark) .shiki span {
  color: var(--shiki-light);
}

@media (prefers-color-scheme: dark) {
  .shiki,
  .shiki span {
    color: var(--shiki-dark);
    background-color: var(--shiki-dark-bg) !important;
  }
}