:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --surface: #ffffff;
  --text: #0f1419;
  --muted: #667786;
  --border: #e3e8ec;
  --accent: #1083fe;
  --accent-soft: #eef6ff;
  --hover: #f3f6f9;
  --card: #fafafa;
  --card-hover: #ffffff;
  --line-strong: #bcbcbc;
  --side-w: 240px;
  --col-w: 600px;
  --tabbar-h: 60px;
  --sans: system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101418;
    --surface: #101418;
    --text: #e7ecf0;
    --muted: #8b9aa8;
    --border: #28313a;
    --accent: #4da3ff;
    --accent-soft: #16202b;
    --hover: #1a2128;
    --card: #161b21;
    --card-hover: #1c232b;
    --line-strong: #46515c;
  }
}

* { box-sizing: border-box; }

html { background: var(--bg); color: var(--text); font-family: var(--sans); line-height: 1.7; }
body { margin: 0; min-width: 320px; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }

.ico { width: 26px; height: 26px; flex: none; }

/* ---------- PC: 2カラム ---------- */
.app {
  display: grid;
  grid-template-columns: var(--side-w) minmax(0, var(--col-w));
  justify-content: center;
  min-height: 100vh;
}

.side { position: relative; }
.side-inner {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  padding: 1.25rem 1rem;
}

.side-brand {
  display: block;
  margin: 0 0 1.25rem 0.6rem;
  color: var(--text);
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.3;
}
.side-brand:hover { text-decoration: none; }

.side-nav { display: flex; flex-direction: column; gap: 0.15rem; }
.side-nav a {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.6rem 0.8rem;
  border-radius: 999px;
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 600;
}
.side-nav a:hover { background: var(--hover); text-decoration: none; }
.side-dirs { margin-top: 0.9rem; padding-top: 0.9rem; border-top: 1px solid var(--border); }
.side-dirs a { font-size: 1rem; font-weight: 500; color: var(--muted); }
.side-dirs .ico { width: 22px; height: 22px; }

.col {
  min-width: 0;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
}
.main { min-height: 80vh; }
.foot { padding: 1.5rem 1rem 2.5rem; color: var(--muted); font-size: 0.8rem; text-align: center; }
.foot p { margin: 0; }

/* ---------- プロフィール ---------- */
.profile { border-bottom: 1px solid var(--border); }

.profile-cover {
  position: relative;
  aspect-ratio: 3 / 1;
  background: var(--hover);
  overflow: hidden;
}
.profile-cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }

.profile-body { position: relative; padding: 0 1rem 1.1rem; }

.profile-avatar {
  position: relative;
  width: 92px;
  height: 92px;
  margin-top: -46px;
  border: 4px solid var(--bg);
  border-radius: 50%;
  background: var(--hover);
  overflow: hidden;
}
.profile-avatar img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; margin: 0; }

/* src="" の層は表示しない（URLが未設定のときは下の層が見える） */
.cover-custom[src=""], .avatar-custom[src=""] { display: none; }

.profile-name { margin: 0.7rem 0 0; font-size: 1.5rem; line-height: 1.3; }
.profile-desc { margin: 0.1rem 0 0; color: var(--muted); font-size: 0.9rem; }
.profile-bio { margin-top: 0.7rem; font-size: 0.95rem; }
.profile-bio > :first-child { margin-top: 0; }
.profile-bio > :last-child { margin-bottom: 0; }
.profile-bio p, .profile-bio ul, .profile-bio ol { margin: 0 0 0.7em; }

/* ---------- フィード（Coreが出力する一覧HTMLを投稿風に） ---------- */
.feed { padding: 0; }
.list-head { padding: 1rem; border-bottom: 1px solid var(--border); }
.list-title { margin: 0; font-size: 1.3rem; }
.list-desc { margin: 0.3rem 0 0; color: var(--muted); font-size: 0.9rem; }
.list-desc:empty { display: none; }

.feed .page-list-items, .feed ul { list-style: none; margin: 0; padding: 0; }
.feed .page-list-items li, .feed > ul > li {
  padding: 1rem;
  border-bottom: 1px solid var(--border);
}
.feed .page-list-items li:hover { background: var(--hover); }
.feed .page-list-items a { color: var(--text); font-weight: 600; }
.feed time, .feed .page-meta { color: var(--muted); font-size: 0.8rem; }
.feed .tag-link {
  display: inline-block;
  margin-left: 0.3rem;
  padding: 0 0.5rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 400;
}

.feed-more { margin: 0; padding: 1.2rem 1rem 2rem; text-align: center; }
.more-button {
  display: inline-block;
  padding: 0.6rem 2rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--accent);
  font-weight: 700;
}
.more-button:hover { background: var(--accent-soft); text-decoration: none; }

/* ---------- 記事カード（ホーム・「もっと読む」・フォルダ一覧など、サイト全体の一覧に共通） ---------- */
.feed.feed-home { padding: 0.85rem 1rem 0; }
.main .page-list-items {
  display: grid;
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.main .page-list-items li {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-height: 5.4rem;
  padding: 0.95rem 1.05rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 0.55rem;
  background: var(--card);
}
/* タイトル */
.main .page-list-items li > a {
  color: var(--text);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.7;
  text-decoration: none;
  /* ホームのタイトルはリンクとして使わない（クリック・タップ不可） */
  pointer-events: none;
  cursor: default;
}
/* 日付: タイトルの下、右寄せ */
.main .page-list-items li::before {
  order: 2;
  align-self: flex-end;
  margin-top: auto;
  padding-top: 0.5rem;
  color: var(--muted);
  content: attr(data-published-date);
  font-size: 0.73rem;
  line-height: 1.4;
  text-align: right;
}
.main .page-list-items li:not([data-published-date])::before { content: ""; }
/* 「もっと読む」: tomos-index のセクションリンク風 */
.feed.feed-home .feed-more { padding: 1.1rem 0 2rem; text-align: left; }
.feed.feed-home .more-button {
  padding: 0.35rem 1rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--muted);
  font-weight: 400;
  line-height: 1.45;
}
.feed.feed-home .more-button:hover { border-color: var(--line-strong); background: var(--card-hover); color: var(--text); text-decoration: none; }

/* ページ送り（Core出力） */
.folder-pagination { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem; padding: 1rem; font-size: 0.85rem; }
.folder-pagination a, .folder-pagination span { padding: 0.35rem 0.8rem; border: 1px solid var(--border); border-radius: 999px; }
.folder-pagination-pages { display: flex; gap: 0.3rem; margin: 0; padding: 0; list-style: none; }

/* ---------- 記事ページ ---------- */
.post { padding: 1rem; }
.post-head { display: flex; flex-wrap: wrap; align-items: center; gap: 0.3rem 0.8rem; color: var(--muted); font-size: 0.8rem; }
.post-head .page-meta { display: flex; flex-wrap: wrap; gap: 0.3rem 0.8rem; margin: 0; font-family: var(--mono); }
.post-head .page-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; margin: 0; padding: 0; border: 0; }
.post-head .page-tags a, .post-head .tag-link {
  padding: 0.05rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.75rem;
}
.post-title { margin: 0.6rem 0 0.8rem; font-size: 1.4rem; line-height: 1.4; }

.page-content { font-size: 1rem; overflow-wrap: anywhere; }
.page-content > :first-child { margin-top: 0; }
.page-content > :last-child { margin-bottom: 0; }
.page-content p, .page-content ul, .page-content ol, .page-content blockquote, .page-content pre { margin: 0 0 1.2em; }
.page-content ul, .page-content ol { padding-left: 1.4rem; }
.page-content h2 { margin: 1.8rem 0 0.8rem; padding-bottom: 0.3rem; border-bottom: 1px solid var(--border); font-size: 1.25rem; }
.page-content h3 { margin: 1.5rem 0 0.6rem; font-size: 1.1rem; }
.page-content blockquote { margin-left: 0; margin-right: 0; padding: 0.6rem 1rem; border-left: 3px solid var(--border); color: var(--muted); }
.page-content code { padding: 0.1em 0.35em; border-radius: 4px; background: var(--hover); font-family: var(--mono); font-size: 0.92em; }
.page-content pre { padding: 1rem; border: 1px solid var(--border); border-radius: 8px; background: var(--hover); overflow-x: auto; }
.page-content pre code { padding: 0; background: transparent; }
.page-content img { display: block; margin: 1.2rem auto; border: 1px solid var(--border); border-radius: 12px; }
.page-content table { border-collapse: collapse; width: 100%; font-size: 0.92rem; }
.page-content th, .page-content td { padding: 0.5rem 0.7rem; border: 1px solid var(--border); text-align: left; }
.page-content .table-scroll { overflow-x: auto; margin: 0 0 1.2em; }
.page-content .youtube-embed { width: 100%; aspect-ratio: 16 / 9; margin: 1.2em 0; }
.page-content .youtube-embed iframe { display: block; width: 100%; height: 100%; border: 0; }

.breadcrumbs { margin: 1.5rem 0 0; color: var(--muted); font-size: 0.8rem; }
.breadcrumbs a { color: var(--muted); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0; padding: 0; list-style: none; }
.breadcrumbs li + li::before { content: "/"; margin-right: 0.4rem; color: var(--border); }

/* ---------- スマホ用パーツは PC では非表示 ---------- */
.tabbar { display: none; }

/* ---------- PC: 右下の丸いフローティングボタン ---------- */
.write-fab {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 4px 14px rgb(0 0 0 / 22%);
  color: #ffffff;
}
.write-fab:hover { color: #ffffff; filter: brightness(1.08); text-decoration: none; }
.write-fab .ico { width: 26px; height: 26px; }

/* ---------- 狭い画面（タブレット）: 左カラムを細くする ---------- */
@media (max-width: 1000px) {
  :root { --side-w: 76px; }
  .side-brand, .side-nav span { display: none; }
  .side-nav a { justify-content: center; padding: 0.75rem; }
  .side-dirs a { justify-content: center; }
}

/* ---------- スマホ: 左カラム非表示 + 下部常駐メニュー ---------- */
@media (max-width: 760px) {
  .app { display: block; }
  .side { display: none; }
  .col { border-left: 0; border-right: 0; }
  .main { min-height: 70vh; }
  .foot { padding-bottom: calc(var(--tabbar-h) + 2rem + env(safe-area-inset-bottom)); }

  .profile-cover { aspect-ratio: 2.4 / 1; }
  .profile-avatar { width: 76px; height: 76px; margin-top: -38px; }

  .tabbar {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 46;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    align-items: center;
    height: calc(var(--tabbar-h) + env(safe-area-inset-bottom));
    padding-bottom: env(safe-area-inset-bottom);
    background: var(--surface);
    border-top: 1px solid var(--border);
  }
  .tabbar a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.1rem;
    height: var(--tabbar-h);
    color: var(--muted);
    font-size: 0.62rem;
    font-weight: 600;
    line-height: 1;
  }
  .tabbar a:hover { text-decoration: none; color: var(--accent); }
  .tabbar .ico { width: 24px; height: 24px; }

  /* 中央の丸いボタン（Tomos Writeを新しいタブで開く） */
  .tabbar a.tabbar-center {
    display: flex;
    align-items: center;
    justify-content: center;
    justify-self: center;
    width: 54px;
    height: 54px;
    margin-top: -22px;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 4px 14px rgb(0 0 0 / 22%);
    color: #ffffff;
  }
  .tabbar a.tabbar-center:hover { color: #ffffff; filter: brightness(1.08); }
  .tabbar-center .ico { width: 26px; height: 26px; }

  /* PC用のフローティングボタンはスマホでは出さない */
  .write-fab { display: none; }
}

/* ---------- 青い丸ボタンのアイコンは、ライト/ダークどちらでも常に白 ---------- */
.write-fab,
.write-fab:link, .write-fab:visited, .write-fab:hover, .write-fab:focus, .write-fab:active,
.tabbar a.tabbar-center,
.tabbar a.tabbar-center:link, .tabbar a.tabbar-center:visited, .tabbar a.tabbar-center:hover,
.tabbar a.tabbar-center:focus, .tabbar a.tabbar-center:active,
.write-fab .ico, .tabbar-center .ico {
  color: #ffffff !important;
}

/* ---------- 一覧まわりの調整（記事ページ内に出る一覧・ページ送りも含む） ---------- */
.main .page-content .page-list-items { margin: 0; padding: 0; }
.main .folder-page-list { margin-top: 1.2rem; padding-top: 0; border-top: 0; }
.main .folder-page-summary { margin: 0 0 0.6rem; }
.main .folder-pagination { padding: 1.2rem 0 0; }
.main .folder-pagination a,
.main .folder-pagination > span { background: var(--card); }
.feed.feed-list { padding-bottom: 2rem; }
.feed.feed-list .list-head { padding: 0.15rem 0 0.85rem; border-bottom: 0; }
.feed.feed-list .list-title { font-size: 1.2rem; }