/* 更新履歴（リリースノート） */

:root {
  --bg: #ffffff;
  --surface: #f8fafc;
  --surface-card: #f8fafc;
  --border: #e2e8f0;
  --text: #334155;
  --text-muted: #64748b;
  --link: #2563eb;
  --link-hover: #1d4ed8;
  --code-bg: #f1f5f9;
  --scope-read: #64748b;
  --scope-write: #2563eb;
  --header-h: 60px;
  /* API リファレンス本文（900px）より少し広め。長い箇条書きの改行を抑える */
  --content-max: 960px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans JP", sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: var(--header-h);
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.site-header-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0.2rem 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
}

.site-logo img {
  width: auto;
  display: block;
}

.site-header-title {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text-muted);
  border-left: 1px solid var(--border);
  padding-left: 0.9rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-left: auto;
  font-size: 0.78rem;
}

.site-nav a {
  color: var(--text-muted);
  text-decoration: none;
  white-space: nowrap;
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 5px;
  transition: color 0.15s, border-color 0.15s;
}

.site-nav a:hover {
  color: var(--link);
  border-color: var(--link);
}

main {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 2.5rem 24px 4.5rem;
}

.changelog-error {
  font-size: 0.875rem;
  color: #991b1b;
  margin: 0 0 1.5rem;
}

.changelog-content > h1:first-child {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 1rem;
  padding: 0;
  border: none;
  letter-spacing: -0.02em;
}

.changelog-content > p {
  margin: 0 0 1rem;
  color: var(--text);
}

.changelog-content > ul {
  margin: 0 0 1.5rem;
  padding-left: 1.25rem;
}

.changelog-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

.changelog-content .changelog-release {
  margin: 0 0 2.5rem;
  padding: 0;
}

.changelog-content .changelog-release h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 0 0 1rem;
  color: var(--text);
}

.changelog-content .changelog-release h2 + p {
  margin-top: 0;
  margin-bottom: 1.25rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.changelog-content .changelog-release h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
  color: var(--text);
}

.changelog-content .changelog-release h3 + p {
  margin: 0 0 0.5rem;
  font-size: 0.9375rem;
  color: var(--text);
}

.changelog-content ul {
  margin: 0 0 1.25rem 0.25rem;
  padding-left: 1.25rem;
}

.changelog-content li {
  margin: 0.35rem 0;
  font-size: 0.9375rem;
}

.changelog-content li::marker {
  color: var(--text-muted);
}

.changelog-content a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.changelog-content a:hover {
  text-decoration: none;
}

.changelog-content strong {
  font-weight: 600;
  color: var(--text);
}

.changelog-content code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85em;
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

.changelog-tags {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0 0 0.75rem;
}

.changelog-tags-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-right: 0.15rem;
}

.changelog-tag {
  font-size: 0.75rem;
  color: var(--scope-read);
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  line-height: 1;
  padding: 0.25rem 0.5rem;
  font-weight: 500;
}

.changelog-tag--tools {
  color: var(--scope-write);
  background: rgba(37, 99, 235, 0.08);
  border-color: rgba(37, 99, 235, 0.18);
}

.changelog-tag.is-muted {
  opacity: 0.45;
}

.copyright {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px 3rem;
  font-size: 0.75rem;
  color: var(--text);
  text-align: center;
}

@media (max-width: 640px) {
  .site-nav {
    display: none;
  }

  .site-nav a {
    margin-left: 0;
    margin-right: 1rem;
  }

  main {
    padding: 1.5rem 16px 2rem;
  }

  .site-header-inner {
    padding: 0.2rem 16px;
  }

  .changelog-content hr {
    margin: 2rem 0;
  }
}