/* ブログ（/blog, /blog/:slug）専用。色・ボタン・ヘッダー・フッターは styles.css を使う。 */

.blog-main {
  padding-bottom: 72px;
}

.header-nav a[aria-current="page"] {
  color: var(--brand);
  font-weight: 700;
}

/* パンくず */
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.breadcrumb li {
  min-width: 0;
}

.breadcrumb li + li::before {
  content: "›";
  margin: 0 8px;
  color: var(--brand-tint);
}

.breadcrumb a {
  color: var(--ink-2);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--brand);
  text-decoration: underline;
}

.breadcrumb [aria-current="page"] {
  overflow: hidden;
  max-width: 22em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 一覧 */
.blog-hero {
  padding: 28px 0 32px;
  background:
    radial-gradient(60% 120% at 100% 0%, var(--brand-soft), transparent 70%),
    var(--bg);
}

.blog-hero h1 {
  margin-top: 20px;
  font-size: clamp(28px, 7vw, 44px);
  font-weight: 900;
}

.blog-hero-sub {
  display: block;
  margin-top: 6px;
  color: var(--brand);
  font-size: 0.5em;
  font-weight: 700;
}

.blog-lead {
  margin-top: 12px;
  color: var(--ink-2);
}

.blog-cats {
  display: flex;
  gap: 8px;
  margin: 22px -20px 0;
  padding: 0 20px 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.blog-cats::-webkit-scrollbar {
  display: none;
}

.blog-cats a {
  flex: none;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
}

.blog-cats a:hover {
  border-color: var(--brand-tint);
  color: var(--brand);
}

.blog-cats a[aria-current="page"] {
  border-color: var(--brand);
  background: var(--brand);
  color: #fff;
}

.blog-list {
  padding-top: 32px;
}

.blog-empty {
  padding: 40px 24px;
  border: 1px dashed var(--brand-tint);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink-2);
  text-align: center;
}

.post-grid {
  display: grid;
  gap: 20px;
}

.post-card a {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-card);
  color: inherit;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.post-card a:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
}

.post-card-thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--brand-soft);
}

.post-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.post-card-thumb.is-empty {
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--brand-soft), var(--brand-tint));
}

.post-card-thumb.is-empty img {
  width: 64px;
  height: 64px;
  border-radius: 16px;
}

.post-card-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 8px;
  padding: 18px 20px 20px;
}

.post-card-cat {
  color: var(--brand);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.post-card-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.55;
  /* balance と auto-phrase の組み合わせだと語の途中（「方｜法」）で折り返すため */
  text-wrap: pretty;
}

.post-card-summary {
  display: -webkit-box;
  overflow: hidden;
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.75;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.post-card time {
  margin-top: auto;
  color: var(--muted);
  font-size: 12px;
}

@media (min-width: 640px) {
  .post-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .blog-hero {
    padding: 40px 0 48px;
  }
  .blog-cats {
    flex-wrap: wrap;
    margin: 28px 0 0;
    padding: 0;
    overflow: visible;
  }
  .post-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }
}

/* 記事 */
.post-container {
  max-width: 800px;
  padding-top: 24px;
}

.post-header {
  margin-top: 24px;
}

.post-cats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.post-cats a {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-ink);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.6;
  text-decoration: none;
}

.post-cats a:hover {
  background: var(--brand-tint);
}

.post-header h1 {
  font-size: clamp(24px, 6.2vw, 36px);
  font-weight: 900;
  line-height: 1.5;
  /* 狭い画面では balance が語の途中で折り返すことがある */
  text-wrap: pretty;
}

@media (min-width: 768px) {
  .post-header h1 {
    text-wrap: balance;
  }
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin-top: 16px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.post-eyecatch {
  margin: 24px 0 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--brand-soft);
  box-shadow: var(--shadow-card);
}

.post-eyecatch img {
  width: 100%;
}

.post-toc {
  margin-top: 32px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.post-toc-title {
  margin-bottom: 8px;
  font-weight: 700;
}

.post-toc ol {
  counter-reset: toc;
}

.post-toc li {
  counter-increment: toc;
  position: relative;
  padding: 6px 0 6px 2em;
  border-top: 1px dashed var(--line);
  font-size: 15px;
  line-height: 1.6;
}

.post-toc li:first-child {
  border-top: 0;
}

.post-toc li::before {
  content: counter(toc) ".";
  position: absolute;
  left: 0;
  color: var(--brand);
  font-weight: 700;
}

.post-toc a {
  color: var(--ink-2);
  text-decoration: none;
}

.post-toc a:hover {
  color: var(--brand);
  text-decoration: underline;
}

/* 本文 */
.post-body {
  margin-top: 36px;
  font-size: 16px;
  line-height: 1.95;
  overflow-wrap: anywhere;
}

.post-body > * + * {
  margin-top: 1.2em;
}

.post-body h2 {
  margin-top: 2.6em;
  padding: 0.2em 0 0.2em 0.8em;
  border-left: 5px solid var(--brand);
  font-size: clamp(21px, 5.2vw, 26px);
  font-weight: 900;
  line-height: 1.5;
}

.post-body h3 {
  margin-top: 2em;
  padding-bottom: 0.3em;
  border-bottom: 2px solid var(--brand-tint);
  font-size: clamp(18px, 4.6vw, 21px);
  font-weight: 700;
  line-height: 1.55;
}

.post-body h2 + *,
.post-body h3 + * {
  margin-top: 1em;
}

.post-body a {
  color: var(--brand-deep);
  text-underline-offset: 3px;
}

.post-body a:hover {
  color: var(--brand);
}

.post-body strong {
  background: linear-gradient(transparent 62%, var(--brand-tint) 62%);
}

.post-body ul,
.post-body ol {
  padding-left: 1.5em;
}

.post-body ul {
  list-style: disc;
}

.post-body ol {
  list-style: decimal;
}

.post-body li + li,
.post-body li > ul,
.post-body li > ol {
  margin-top: 0.4em;
}

.post-body li::marker {
  color: var(--brand);
  font-weight: 700;
}

.post-body blockquote {
  margin: 1.4em 0 0;
  padding: 14px 18px;
  border-left: 4px solid var(--line);
  background: var(--surface);
  color: var(--ink-2);
}

.post-body hr {
  margin: 2.4em 0;
  border: 0;
  border-top: 1px solid var(--line);
}

.post-body code {
  padding: 0.1em 0.4em;
  border-radius: 6px;
  background: var(--brand-soft);
  font-size: 0.92em;
}

.post-code {
  overflow-x: auto;
  padding: 16px;
  border-radius: 14px;
  background: var(--dark);
  color: #fff;
  font-size: 14px;
  line-height: 1.7;
}

.post-code code {
  padding: 0;
  background: none;
}

.post-figure {
  margin: 1.6em 0 0;
}

/* 縦長の画面写真は大きくなりすぎないよう高さを抑える */
.post-figure img {
  max-height: 640px;
  margin: 0 auto;
  border-radius: 16px;
  background: var(--brand-soft);
}

.post-figure figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
  text-align: center;
}

.post-callout {
  display: flex;
  gap: 12px;
  padding: 16px 18px;
  border-radius: 16px;
  background: var(--brand-soft);
}

.post-callout-icon {
  flex: none;
  font-size: 20px;
  line-height: 1.6;
}

.post-callout > div > * + * {
  margin-top: 0.8em;
}

.post-toggle {
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}

.post-toggle summary {
  font-weight: 700;
  cursor: pointer;
}

.post-toggle > * + * {
  margin-top: 0.8em;
}

.post-link a {
  display: block;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  overflow-wrap: anywhere;
}

.post-table {
  overflow-x: auto;
}

.post-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.post-table th,
.post-table td {
  padding: 8px 12px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.post-table th {
  background: var(--brand-soft);
}

@media (min-width: 768px) {
  .post-container {
    padding-top: 32px;
  }
  .post-body {
    font-size: 17px;
  }
}

/* 記事末尾の問い合わせ */
.post-cta {
  margin-top: 56px;
  padding: 28px 18px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(80% 120% at 100% 0%, rgb(241 90 25 / 0.35), transparent 60%),
    var(--dark);
  color: #fff;
  text-align: center;
}

.post-cta-kicker {
  color: #ffb08a;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.post-cta-title {
  margin-top: 8px;
  font-size: clamp(22px, 5.6vw, 30px);
  font-weight: 900;
  line-height: 1.45;
  word-break: auto-phrase;
  text-wrap: balance;
}

.post-cta-text {
  max-width: 34em;
  margin: 12px auto 0;
  color: rgb(255 255 255 / 0.82);
  font-size: 15px;
}

.post-cta-actions {
  display: grid;
  justify-items: center;
  gap: 14px;
  margin-top: 22px;
}

.post-cta .btn {
  width: 100%;
  max-width: 420px;
  padding-inline: 16px;
  font-size: clamp(15px, 4.4vw, 18px);
}

.post-cta-link {
  color: rgb(255 255 255 / 0.85);
  font-size: 14px;
  text-underline-offset: 3px;
}

.post-cta-link:hover {
  color: #fff;
}

.blog-cta-wrap {
  max-width: 880px;
}

@media (min-width: 768px) {
  .post-cta {
    padding: 40px 48px;
  }
}

/* 関連記事 */
.related {
  margin-top: 64px;
  padding: 56px 0 8px;
  border-top: 1px solid var(--line);
}

.related-title {
  margin-bottom: 24px;
  font-size: clamp(22px, 5.4vw, 28px);
  font-weight: 900;
}

.related-back {
  margin-top: 28px;
  text-align: center;
}

.related-back a,
.blog-message-links a {
  color: var(--brand-deep);
  font-weight: 700;
  text-underline-offset: 3px;
}

/* 404・読み込みエラー */
.blog-message {
  padding: 56px 0;
}

.blog-message-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: 20px;
}

@media (prefers-reduced-motion: reduce) {
  .post-card a {
    transition: none;
  }
  .post-card a:hover {
    transform: none;
  }
}