/* デジタル庁デザインシステム β — Standard Std-17N-170 ベース */

:root {
  color-scheme: light;

  /* Typography tokens (DADS Std-17N-170) */
  --font-body:
    "Noto Sans JP",
    "BunsenGothic",
    "BunsenGothicExt",
    "BunsenGothicPUP",
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  --font-heading:
    "Noto Serif JP",
    "BunsenMincho",
    "BunsenMinchoExt",
    "BunsenMinchoPUP",
    serif;
  --font-mono: "Noto Sans Mono", monospace;

  --text-size-body: 17px;
  --text-size-h1: 32px;
  --text-size-h2: 26px;
  --text-size-h3: 22px;
  --text-size-meta: 16px;
  --line-height-body: 1.7;
  --line-height-heading: 1.5;
  --letter-spacing-body: 0.02em;

  /* Weight tokens (Noto VF 連続値). 小さい文字ほどやや重くして視認性を補正 */
  --weight-body: 450;
  --weight-compact: 475;
  --weight-emphasis: 600;
  --weight-heading: 700;

  /* Neutral palette (DADS common colors 近似) */
  --color-text: #1a1a1c;
  --color-text-secondary: #626264;
  --color-link: #0017c1;
  --color-link-visited: #8b008b;
  --color-border: #d8d8db;
  --color-bg: #ffffff;
  --color-surface: #f8f8fb;
  --color-code-bg: #f4f4f5;

  --max-width: 45rem;
  --spacing: 1.5rem;
}

html {
  font-size: var(--text-size-body);
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-weight: var(--weight-body);
  line-height: var(--line-height-body);
  letter-spacing: var(--letter-spacing-body);
  -webkit-font-smoothing: auto;
  -moz-osx-font-smoothing: auto;
}

.site-header {
  align-items: center;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  gap: 1.5rem;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 1rem 1.5rem;
}

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

.site-nav a {
  font-size: 0.95rem;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: var(--weight-compact);
  margin: 3rem auto 0;
  max-width: var(--max-width);
  padding: 1.5rem;
  text-align: center;
}

main {
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 2rem 1.5rem 3rem;
}

/* Blog index (srn layout: blog) */
.blog-index .blog-header {
  margin-bottom: 2.5rem;
  text-align: center;
}

.blog-index .blog-header h1 {
  border: none;
  margin-bottom: 0.75rem;
  padding: 0;
}

.blog-lead {
  color: var(--color-text-secondary);
  font-weight: var(--weight-compact);
  margin: 0 0 1rem;
}

.blog-profile-link {
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text);
  display: inline-block;
  font-size: 0.9rem;
  padding: 0.25rem 0.85rem;
  text-decoration: none;
}

.blog-profile-link:hover {
  border-color: var(--color-link);
  color: var(--color-link);
}

.blog-featured {
  border-bottom: 1px dashed var(--color-border);
  margin-bottom: 3rem;
  padding-bottom: 2rem;
}

.blog-featured h2 {
  border: none;
  font-size: var(--text-size-h2);
  margin-top: 0;
  padding: 0;
}

.blog-featured h2 a {
  color: inherit;
  text-decoration: none;
}

.blog-featured h2 a:hover {
  color: var(--color-link);
}

.blog-permalink {
  margin-top: 1.5rem;
  text-align: right;
}

.blog-archive h2 {
  font-size: 1.35rem;
  margin-top: 0;
}

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

.blog-list-item {
  border-bottom: 1px solid var(--color-border);
  margin: 0;
  padding: 1rem 0;
}

.blog-list-title {
  color: var(--color-text);
  display: block;
  font-size: 1.1rem;
  font-weight: var(--weight-emphasis);
  margin-bottom: 0.35rem;
  text-decoration: none;
}

.blog-list-title:hover {
  color: var(--color-link);
}

.blog-list-meta {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: var(--weight-compact);
  line-height: 1.5;
}

.blog-list-desc {
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  display: -webkit-box;
  line-clamp: 2;
  margin-top: 0.25rem;
  overflow: hidden;
}

.article-page h1 {
  margin-top: 0;
}

.article-tags {
  margin-top: 0.5rem;
}

.article-tag {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  display: inline-block;
  font-size: 0.85rem;
  font-weight: var(--weight-compact);
  margin-right: 0.35rem;
  padding: 0.1rem 0.45rem;
  text-decoration: none;
}

.article-nav {
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  display: flex;
  flex-wrap: wrap;
  font-size: 0.95rem;
  gap: 0.75rem;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 1.5rem;
}

.blog-pagination,
.blog-more-pages {
  margin-top: 2rem;
  text-align: center;
}

.site-nav a + a::before {
  content: " · ";
}

.search-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.search-input {
  flex: 1 1 16rem;
  padding: 0.5rem 0.75rem;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.search-facet {
  padding: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.search-submit {
  padding: 0.5rem 1.2rem;
  font-size: 1rem;
  color: #fff;
  background: var(--color-link);
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.search-status {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: var(--weight-compact);
}

.search-results {
  list-style: none;
  margin: 1rem 0;
  padding: 0;
}

.search-hit {
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 0;
}

.search-hit-title {
  font-weight: var(--weight-emphasis);
}

.search-hit-meta {
  color: var(--color-text-secondary);
  font-size: 0.8rem;
  font-weight: var(--weight-compact);
  margin: 0.2rem 0;
}

.search-hit-snippet {
  font-size: 0.9rem;
  font-weight: var(--weight-compact);
  margin: 0.2rem 0 0;
}

/* Headings — 既定はゴシック。font: GJM 等の明示指定時のみ明朝 */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-body);
  color: var(--color-text);
  font-weight: var(--weight-heading);
  line-height: var(--line-height-heading);
  margin-top: 2.5em;
  margin-bottom: 0.75em;
}

.font-serif,
.font-serif h1,
.font-serif h2,
.font-serif h3,
.font-serif h4,
.font-serif h5,
.font-serif h6 {
  font-family: var(--font-heading);
}

h1 {
  font-size: var(--text-size-h1);
  margin-top: 0;
  padding-bottom: 0.5em;
  border-bottom: 1px solid var(--color-border);
}

h2 {
  font-size: var(--text-size-h2);
  padding-bottom: 0.25em;
  border-bottom: 1px solid var(--color-border);
}

h3 {
  font-size: var(--text-size-h3);
}

p {
  margin: 0 0 1.5em;
}

a {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

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

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

.article-meta {
  color: var(--color-text-secondary);
  font-size: var(--text-size-meta);
  font-weight: var(--weight-compact);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.article-list {
  padding-left: 1.25rem;
  line-height: 1.7;
}

.article-list li {
  margin-bottom: 0.5em;
}

/* Code — DADS Mono */
pre,
code,
kbd,
samp {
  font-family: var(--font-mono);
}

pre {
  background-color: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 16px;
  line-height: 1.5;
  margin: 1.5em 0;
  overflow-x: auto;
  padding: 1rem;
}

code {
  background-color: var(--color-code-bg);
  border-radius: 2px;
  font-size: 0.9em;
  padding: 0.15em 0.35em;
}

pre code {
  background: transparent;
  padding: 0;
}

blockquote {
  border-left: 4px solid var(--color-border);
  color: var(--color-text-secondary);
  margin: 1.5em 0;
  padding: 0.25em 0 0.25em 1.25em;
}

ul,
ol {
  margin: 0 0 1.5em;
  padding-left: 1.75em;
}

li {
  margin-bottom: 0.35em;
}

article table {
  border-collapse: collapse;
  margin: 1.5em 0;
  width: 100%;
}

article th,
article td {
  border: 1px solid var(--color-border);
  padding: 0.5rem 0.75rem;
  text-align: left;
}

article th {
  background-color: var(--color-surface);
  font-weight: var(--weight-heading);
}

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

figure[role="img"],
figure.diagram {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  display: flex;
  justify-content: center;
  margin: 2em 0;
  padding: 1rem;
}

figure[role="img"] svg,
figure.diagram img {
  max-width: 100%;
  height: auto;
}

pre code.language-mermaid,
pre code.language-d2,
pre code.language-graphviz,
pre code.language-dot {
  font-size: 0.85em;
}