/* お知らせ・ヘルプ・規約など、app/web/content から生成するページの共通スタイル */
:root {
  --color-bg: #ffffff;
  --color-text: #525e6a;
  --color-text-secondary: #72777f;
  --color-border: #e3e6e8;
  --color-accent: #fb4c42;
}
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f1011;
    --color-text: #ffffff;
    --color-text-secondary: #c8cacc;
    --color-border: #2c2f33;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: system-ui, sans-serif;
  line-height: 1.8;
  line-break: strict;
  overflow-wrap: anywhere;
}
a { color: inherit; text-underline-offset: .2em; }
a:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 4px; border-radius: 6px; }

.site-header {
  padding:
    max(16px, env(safe-area-inset-top))
    max(16px, env(safe-area-inset-right))
    0
    max(16px, env(safe-area-inset-left));
  border-bottom: 1px solid var(--color-border);
}
.site-header .logo { display: inline-block; line-height: 0; border-radius: 6px; }
.site-header .logo svg { display: block; width: 44px; height: auto; }
.site-nav ul {
  display: flex;
  gap: 4px 20px;
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  white-space: nowrap;
  font-size: .8125rem;
}
.site-nav a { display: block; padding: 6px 0 10px; text-decoration: none; color: var(--color-text-secondary); }
.site-nav a[aria-current="page"] { color: var(--color-text); box-shadow: inset 0 -2px var(--color-accent); }

main {
  flex: 1;
  width: 100%;
  max-width: 44rem;
  margin: 0 auto;
  padding: 32px max(16px, env(safe-area-inset-right)) 48px max(16px, env(safe-area-inset-left));
}
h1 { margin: 0 0 24px; font-size: 1.375rem; line-height: 1.5; }
.article-date { display: block; margin: 0 0 8px; color: var(--color-text-secondary); font-size: .8125rem; }
.article-body { font-size: .9375rem; }
.article-body p { margin: 0; }
.article-body h2, .article-body h3 { margin: 1.6em 0 .4em; line-height: 1.5; }
.article-body h2 { font-size: 1.125rem; }
.article-body h3 { font-size: 1rem; }
.article-body hr { margin: 2em 0; border: 0; border-top: 1px solid var(--color-border); }
.article-body figure { margin: 1.2em 0; }
.article-body img { display: block; width: 100%; height: auto; margin: 0 auto; }
.article-body .video { position: relative; aspect-ratio: 16 / 9; margin: 1.2em 0; }
.article-body .video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.back-link { margin: 40px 0 0; font-size: .875rem; }

.news-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--color-border); }
.news-list li { border-bottom: 1px solid var(--color-border); }
.news-list a { display: block; padding: 14px 0; text-decoration: none; }
.news-list a:hover .news-title { text-decoration: underline; }
.news-list time { display: block; color: var(--color-text-secondary); font-size: .8125rem; }

footer {
  padding:
    20px
    max(16px, env(safe-area-inset-right))
    max(24px, env(safe-area-inset-bottom))
    max(16px, env(safe-area-inset-left));
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: .75rem;
  text-align: center;
}
footer ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 20px;
  margin: 0 auto;
  padding: 0;
  max-width: 48rem;
  list-style: none;
}
footer li a { display: inline-block; padding: 2px 0; text-decoration: none; }
footer li a:hover { text-decoration: underline; }
.copyright { margin: 12px 0 0; }
footer small { font-size: .625rem; }