/* Blog article layout and TOC — split from main.css */
/* -------------------------------------------------
   Blog Typography Tokens (Article Body)
   Target: Gutenberg/classic content area
------------------------------------------------- */
:root {
  --blog-measure: 70ch;
  --blog-lh: 1.95;

  --blog-h2-size: clamp(1.4rem, 1.1rem + 1.2vw, 2rem);
  --blog-h3-size: clamp(1.15rem, 1rem + 0.7vw, 1.5rem);
  --blog-h4-size: clamp(1.02rem, 0.95rem + 0.35vw, 1.2rem);

  --blog-heading-weight: 700;
  --blog-strong-weight: 700;
  --blog-quote-border: #1f3a5f;
  --blog-quote-text: #2b2f36;
}

/* Article body wrapper
   Apply to post content area: .entry-content (or .post-content)
*/
.entry-content,
.post-content {
  max-width: var(--blog-measure);
  line-height: var(--blog-lh);
  color: var(--color-text);
}

/* Headings */
.entry-content h2,
.post-content h2 {
  margin: 2.4em 0 0.9em;
  padding: 0 0 0.45em;
  font-size: var(--blog-h2-size);
  font-weight: var(--blog-heading-weight);
  letter-spacing: 0.01em;
  border-bottom: 1px solid var(--color-border);
}

.entry-content h3,
.post-content h3 {
  margin: 2em 0 0.85em;
  font-size: var(--blog-h3-size);
  font-weight: var(--blog-heading-weight);
  letter-spacing: 0.01em;
}

.entry-content h4,
.post-content h4 {
  margin: 1.7em 0 0.75em;
  font-size: var(--blog-h4-size);
  font-weight: var(--blog-heading-weight);
  letter-spacing: 0.005em;
  color: var(--color-text-soft);
}

/* Strong / Emphasis */
.entry-content strong,
.post-content strong {
  font-weight: var(--blog-strong-weight);
  color: var(--color-ink-strong);
}

.entry-content em,
.post-content em {
  font-style: italic;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
}

/* Blockquote */
.entry-content blockquote,
.post-content blockquote {
  margin: 1.8em 0;
  padding: 0;
  background: var(--color-bg);
  border-left: 3px solid var(--blog-quote-border);
  box-shadow: inset 0 0 0 1px var(--color-border);
}

.entry-content blockquote > p,
.post-content blockquote > p {
  margin: 0;
  padding: 1.1em 1.2em 1.1em 1.3em;
  background: var(--color-surface-2);
  color: var(--blog-quote-text);
}

.entry-content blockquote p:last-child,
.post-content blockquote p:last-child {
  margin-bottom: 0;
}

/* Optional: keep list rhythm tidy in articles */
.entry-content ul,
.entry-content ol,
.post-content ul,
.post-content ol {
  margin: 1.1em 0 1.1em 1.4em;
}

.entry-content li,
.post-content li {
  margin: 0.35em 0;
}

/* Marker highlight for blog content */
.entry-content mark,
.post-content mark {
  background: linear-gradient(transparent 52%, #ffe45c 52%);
  color: inherit;
  padding: 0 0.12em;
}

/* ============================================================
   ARTICLE DETAIL PAGE
   レイアウト幅: 親 .inner（main.css --layout-inner = 最大1120px）
   ============================================================ */

.article-detail {
  padding-bottom: clamp(80px, 10vw, 120px);
}

/* Header — 幅は親 .inner（--layout-inner）に委譲 */
.article-detail__header {
  padding: clamp(52px, 8vw, 100px) 0 clamp(36px, 5vw, 60px);
}

.article-detail__type {
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--color-text-soft);
  margin: 0 0 22px;
}

.article-detail__title {
  font-size: clamp(1.45rem, 3vw, 2.5rem);
  font-weight: 400;
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--color-ink-main);
  margin: 0 0 28px;
}

.article-detail__meta {
  margin: 0;
}

.article-detail__date {
  font-family: var(--font-en);
  font-size: var(--fs-sm);
  color: var(--color-text-soft);
  letter-spacing: 0.07em;
}

/* Table of contents (blog / post only) */
.article-toc {
  margin-bottom: clamp(28px, 4vw, 40px);
}

.article-toc__details {
  background: none;
  border: 0;
  box-shadow: none;
}

.article-toc__summary {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: var(--space-16);
  padding: 0 0 clamp(10px, 1.6vw, 14px);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.article-toc__summary::-webkit-details-marker {
  display: none;
}

.article-toc__toggle {
  position: relative;
  flex-shrink: 0;
  width: 1.1rem;
  height: 1.1rem;
}

.article-toc__toggle::before,
.article-toc__toggle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 0.62rem;
  height: 1.5px;
  margin: -0.75px 0 0 -0.31rem;
  border-radius: 999px;
  background-color: var(--color-text-soft);
  transition: transform var(--dur-base) var(--ease-standard), opacity var(--dur-base) var(--ease-standard);
}

.article-toc__toggle::after {
  transform: rotate(90deg);
}

.article-toc__details[open] .article-toc__toggle::after {
  transform: rotate(0deg);
  opacity: 0;
}

.article-toc__label {
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

.article-toc__title {
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-ink-main);
}

.article-toc__list {
  margin: 0;
  padding: clamp(10px, 1.6vw, 16px) 0 0;
  list-style: none;
  counter-reset: axihub-toc;
}

.article-toc__item {
  position: relative;
  margin: 0.4em 0;
  padding-left: 1.65em;
  font-size: var(--fs-sm);
  line-height: 1.75;
  counter-increment: axihub-toc;
}

.article-toc__item::before {
  content: counter(axihub-toc) ".";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-en);
  font-size: 0.82em;
  color: var(--color-text-soft);
}

.article-toc__sublist {
  margin: 0.35em 0 0.12em;
  padding: 0 0 0 1.35em;
  list-style: none;
}

.article-toc__subitem {
  margin: 0.28em 0;
}

.article-toc__item--h3 {
  counter-increment: none;
  padding-left: 1.35em;
}

.article-toc__item--h3::before {
  content: none;
}

.article-toc__link {
  color: var(--color-text);
  text-decoration: none;
  text-underline-offset: 3px;
  text-decoration-color: transparent;
  transition: color var(--dur-base) var(--ease-standard), text-decoration-color var(--dur-base) var(--ease-standard);
}

.article-toc__link--h3 {
  font-size: 0.92em;
  color: var(--color-text-soft);
}

.article-toc__link:hover {
  color: var(--color-ink-main);
  text-decoration: underline;
  text-decoration-color: var(--color-border);
}

.article-toc__link:focus-visible {
  outline: 1px solid var(--color-ink-main);
  outline-offset: 3px;
}

.article-content h2[id],
.article-content h3[id] {
  scroll-margin-top: calc(var(--fv-header-height) + var(--space-24));
}

.article-toc + .article-detail__body {
  padding-top: clamp(20px, 3vw, 32px);
}

/* Body */
.article-detail__body {
  padding-top: clamp(36px, 5vw, 56px);
}

/* Footer */
.article-detail__footer {
  padding-top: clamp(40px, 5vw, 64px);
}

.article-detail__back {
  font-family: var(--font-en);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-soft);
  text-decoration: none;
  transition: color var(--dur-base) var(--ease-standard);
}

.article-detail__back:hover {
  color: var(--color-ink-main);
}

/* ---- Prose styles (article-content) ---- */

.article-content > * + * {
  margin-top: 0;
}

.article-content p {
  margin: 0 0 1.8em;
  font-size: clamp(0.9rem, 1.3vw, 1rem);
  line-height: 2.05;
  color: var(--color-text);
}

.article-content p:last-child {
  margin-bottom: 0;
}

.article-content a {
  color: var(--color-ink-main);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--color-border);
  transition: text-decoration-color var(--dur-base) var(--ease-standard);
}

.article-content a:hover {
  text-decoration-color: var(--color-ink-main);
}

.article-content strong {
  font-weight: 600;
  color: var(--color-ink-main);
}

.article-content em {
  font-style: italic;
}

.article-content s,
.article-content del {
  opacity: 0.5;
}

/* Inline code */
.article-content code:not(pre code) {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.875em;
  background-color: var(--color-surface-2);
  padding: 2px 7px;
  border-radius: 2px;
  color: var(--color-ink-main);
  word-break: break-all;
}

/* Headings */
.article-content h2 {
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  font-weight: 500;
  color: var(--color-ink-main);
  line-height: 1.5;
  letter-spacing: 0.01em;
  margin: clamp(52px, 6vw, 80px) 0 20px;
  padding: 13px 18px;
  background-color: var(--color-surface-2);
}

.article-content h3 {
  font-size: clamp(1rem, 1.7vw, 1.2rem);
  font-weight: 500;
  color: var(--color-ink-main);
  line-height: 1.55;
  margin: clamp(36px, 4.5vw, 52px) 0 14px;
}

.article-content h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-ink-main);
  line-height: 1.55;
  margin: clamp(28px, 3.5vw, 40px) 0 10px;
}

.article-content h5,
.article-content h6 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-soft);
  line-height: 1.55;
  margin: clamp(20px, 3vw, 32px) 0 8px;
}

/* Lists */
.article-content ul,
.article-content ol {
  margin: 0 0 1.8em;
  padding-left: 1.6em;
}

.article-content li {
  font-size: clamp(0.9rem, 1.3vw, 1rem);
  line-height: 2;
  color: var(--color-text);
  margin-bottom: 0.35em;
}

.article-content li:last-child {
  margin-bottom: 0;
}

.article-content ul li::marker {
  color: var(--color-text-soft);
}

.article-content ol li::marker {
  font-family: var(--font-en);
  font-size: 0.875em;
  color: var(--color-text-soft);
}

.article-content ul ul,
.article-content ol ol,
.article-content ul ol,
.article-content ol ul {
  margin-top: 0.4em;
  margin-bottom: 0.4em;
}

/* Blockquote */
.article-content blockquote {
  margin: clamp(24px, 4vw, 40px) 0;
  padding: clamp(16px, 2.5vw, 24px) clamp(20px, 3vw, 32px);
  background-color: var(--color-surface-2);
  font-style: italic;
  color: var(--color-text-soft);
}

.article-content blockquote p {
  margin: 0;
  line-height: 1.9;
}

/* Table */
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1.8em;
  font-size: var(--fs-sm);
  line-height: 1.75;
}

.article-content th {
  background-color: var(--color-ink-main);
  color: rgba(255, 255, 255, 0.88);
  font-weight: 400;
  padding: 10px 16px;
  text-align: left;
  letter-spacing: 0.04em;
}

.article-content td {
  padding: 10px 16px;
  color: var(--color-text);
  vertical-align: top;
}

.article-content tr:nth-child(even) td {
  background-color: var(--color-surface-2);
}

/* Code block */
.article-content pre {
  background-color: var(--color-ink-strong);
  color: rgba(255, 255, 255, 0.82);
  padding: clamp(16px, 2.5vw, 24px);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 0 1.8em;
  border-radius: 2px;
}

.article-content pre code {
  font-family: 'Courier New', Courier, monospace;
  background: none;
  padding: 0;
  color: inherit;
  font-size: 0.875rem;
  line-height: 1.85;
  border-radius: 0;
  word-break: normal;
}

/* HR */
.article-content hr {
  border: none;
  height: 1px;
  background-color: var(--color-surface-2);
  margin: clamp(32px, 5vw, 56px) 0;
}

/* Images */
.article-content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: clamp(24px, 3.5vw, 40px) auto;
}

@media (max-width: 640px) {
  .article-content h2 {
    padding: 11px 14px;
  }

  .article-content table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

/* ============================================================
   ARTICLE PREV / NEXT NAV
   ============================================================ */

.article-nav {
  padding-top: clamp(48px, 6vw, 72px);
}

.article-nav__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background-color: var(--color-surface-2);
}

.article-nav__item {
  background-color: var(--color-bg);
  padding: clamp(20px, 3vw, 32px) clamp(18px, 2.5vw, 28px);
  min-height: 96px;
}

.article-nav__item--next {
  text-align: right;
}

.article-nav__link {
  display: block;
  text-decoration: none;
  height: 100%;
  transition: opacity var(--dur-base) var(--ease-standard);
}

.article-nav__link:hover {
  opacity: 0.55;
}

.article-nav__dir {
  display: block;
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-text-soft);
  margin-bottom: 10px;
}

.article-nav__title {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: var(--fs-sm);
  line-height: 1.65;
  color: var(--color-ink-main);
}

@media (max-width: 560px) {
  .article-nav__inner {
    grid-template-columns: 1fr;
  }

  .article-nav__item--next {
    text-align: left;
  }
}

/* ── Article author block ──────────────────────────────────── */

.article-author {
  display: flex;
  align-items: center;
  gap: var(--space-16);
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.article-author__img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  background: var(--color-border);
  display: block;
}

.article-author__info {
  min-width: 0;
}

.article-author__name {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-ink-main);
  margin: 0 0 5px;
  letter-spacing: 0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.article-author__bio {
  font-size: 0.78rem;
  color: var(--color-text-soft);
  margin: 0;
  line-height: 1.65;
}