/* タイピングタイクーンの土台(typing-tycoon の app/docs/DESIGN.md 3 章のトークン・5 章のヘッダーとフッター・本文の枠)。
   サンクツのテーマ usucha の写しから。色はブランドの赤、画面は PC 優先(R2-4b)。
   ゲームのステージの見た目は、エンジンの stage.css(engine/v<版>/games/<シリーズ>/stage.css)。
   フォントは端末の標準フォントで始める(Web フォントは使わない。2026-10-06 ユーザー。DESIGN 4-1)。 */
:root {
  --bg: #F4F6F8;
  --text: #14202B;
  --sub: #52606D;
  --line: #D9E0E6;
  --line-strong: #C5CED6;
  --card: #FFFFFF;
  --footer: #14202B;
  --link: #1F5FBF;
  --link-hover: #174A94;
  --accent: #C12A1F; /* ブランドの赤(DESIGN 3 章。白文字とのコントラスト 約 5.8) */
  --accent-tint: color-mix(in srgb, var(--accent) 8%, #fff);
  --tag-bg: #EEF2F6;
  --notice-bg: #FFF3E0;
  --notice-line: #F2D5A5;
  --font: system-ui, -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Yu Gothic", YuGothic, sans-serif;
  /* 数字: 標準フォントの太字 + 等幅の数字(tabular-nums)。Safari は ui-rounded を優先 */
  --font-num: ui-rounded, system-ui, -apple-system, "Hiragino Sans", "Segoe UI", sans-serif;
  --font-code: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --wrap: 1100px;
  --gutter: 20px;
}
@media (max-width: 759px) {
  :root { --gutter: 16px; }
}

*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
}
a { color: var(--link); }
a:hover { color: var(--link-hover); }
img { max-width: 100%; height: auto; }

.skip {
  position: absolute; left: 8px; top: -48px; z-index: 10;
  padding: 8px 12px; background: var(--card); color: var(--text); border: 2px solid var(--text); border-radius: 8px;
}
.skip:focus { top: 8px; }

/* ---- ヘッダー(MainB2) ---- */
.site-header { background: var(--card); border-bottom: 1px solid var(--line); }
.site-header-in {
  max-width: 1200px; margin: 0 auto; padding: 0 40px; min-height: 68px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 900; font-size: 20px; color: var(--text); text-decoration: none; }
.brand:hover { color: var(--text); }
.brand img { width: 36px; height: 45px; } /* マスコットの本体(縦長) */
.main-nav { display: flex; gap: 8px; align-items: center; }
.main-nav a {
  padding: 22px 14px 19px; color: var(--text); text-decoration: none; font-weight: 500; font-size: 15px;
  border-bottom: 3px solid transparent;
}
.main-nav a[aria-current="page"] { color: var(--accent); font-weight: 700; border-bottom-color: var(--accent); }
@media (max-width: 759px) {
  .site-header-in { padding: 10px var(--gutter) 0; flex-wrap: wrap; } /* マスコットの王冠が上の端に当たらないように */
  .main-nav { gap: 0; overflow-x: auto; width: 100%; }
  .main-nav a { padding: 10px 12px 9px; white-space: nowrap; }
}

/* ---- 本文の枠 ---- */
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter) 64px; }
.crumbs { padding-top: 20px; font-size: 13px; color: var(--sub); }
.crumbs a { color: var(--sub); }
.page-title { margin: 20px 0 16px; font-size: 30px; line-height: 1.3; font-weight: 900; }
@media (max-width: 759px) {
  .page-title { font-size: 24px; }
}
.prose { max-width: 800px; }

/* ---- フッター(MainB2) ---- */
.site-footer { background: var(--footer); color: #D9E0E6; }
.footer-brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; }
.footer-brand img { width: 29px; height: 36px; }
.site-footer-in {
  max-width: 1200px; margin: 0 auto; padding: 36px 40px;
  display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap;
}
.footer-brand { font-weight: 900; font-size: 16px; }
.site-footer nav { display: flex; gap: 24px; flex-wrap: wrap; }
.site-footer a { color: #FFFFFF; font-size: 14px; }
.site-footer .copy { font-size: 13px; color: #C3CCD5; }
@media (max-width: 759px) {
  .site-footer-in { padding: 28px var(--gutter); flex-direction: column; align-items: flex-start; }
}

/* ---- シリーズごとの主役色: タイピングのシリーズができたら足す(サンクツの 2048・神経衰弱の色は外した。R2-4b) ---- */

/* ---- ゲームのページ(MainB2) ---- */
.game-head { max-width: 800px; margin: 0 auto; padding: 10px 0 16px; }
.game-head .page-title { margin: 0; }
.updated { margin-top: 8px; font-size: 13px; color: var(--sub); }
.game-page .crumbs { max-width: var(--wrap); margin: 0 auto; }
.game-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px;
}
.not-ready { margin: 0; padding: 48px 0; text-align: center; color: var(--sub); }
.game-body { max-width: 800px; margin: 0 auto; }
.card {
  margin-top: 24px; background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px;
}
.card h2 { margin: 0 0 14px; font-size: 26px; line-height: 1.4; font-weight: 900; }
.card p { margin: 0 0 12px; }
.card p:last-child, .card ul:last-child, .card dl:last-child { margin-bottom: 0; }
.pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; align-items: stretch; margin-top: 24px; }
.pair .card { margin-top: 0; }
.pair .card h2 { font-size: 20px; }
@media (max-width: 759px) {
  .game-card { padding: 16px 12px; border-radius: 12px; }
  .card { padding: 20px 16px; }
  .card h2 { font-size: 22px; }
  .pair { grid-template-columns: minmax(0, 1fr); }
}

/* 引き継ぎコード(専用ページ /transfer/ に開いた形で置く。app/docs/TRANSFER-CODE.md §3-6・見本 app/docs/review/2026-10-08-transfer-place/)。
   名前は .transfer(.share は制作ノートの「シェア」で使っている) */
.transfer { max-width: 720px; margin: 20px 0 0; }
.transfer [hidden] { display: none !important; }
.transfer-body { padding: 4px 20px 20px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); }
.transfer-part { padding-top: 16px; }
.transfer-part + .transfer-part { margin-top: 16px; border-top: 1px solid var(--line); }
.transfer-part h3 { margin: 0 0 6px; font-size: 15px; font-weight: 900; }
.transfer-part p { margin: 0 0 10px; font-size: 14px; color: var(--sub); }
.transfer-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
/* ボタンの見た目はここで全部決める(エンジンの stage.css の .btn が読まれるページでも上書きされないように) */
.transfer .btn {
  min-height: 44px; padding: 0 18px; border: 1px solid #C3CCD5; border-radius: 10px; background: #FFFFFF; color: var(--text);
  font-family: var(--font); font-size: 15px; font-weight: 700; cursor: pointer;
}
.transfer .btn-primary { padding: 0 20px; border-color: var(--accent); background: var(--accent); color: #FFFFFF; }
.transfer .btn:disabled { opacity: .55; cursor: default; }
.transfer-code {
  font-family: var(--font-code); font-size: 18px; font-weight: 700; letter-spacing: .06em; user-select: all;
  padding: 8px 12px; border-radius: 8px; background: #F4F6F8; border: 1px solid var(--line); overflow-wrap: anywhere; /* 折り返しはハイフンの所が先 */
}
.transfer input {
  flex: 1 1 260px; min-width: 0; min-height: 44px; padding: 0 12px; border: 1px solid #A9B6C3; border-radius: 10px;
  font-family: var(--font-code); font-size: 16px; letter-spacing: .04em; text-transform: uppercase; background: #FFFFFF; color: var(--text);
}
.transfer input::placeholder { text-transform: none; letter-spacing: 0; font-family: var(--font); color: #8796A5; }
.transfer-link { padding: 0; border: 0; background: none; color: var(--link); font: inherit; font-size: 14px; text-decoration: underline; cursor: pointer; }
.transfer-part .transfer-msg { margin: 10px 0 0; padding: 10px 12px; border-radius: 8px; font-size: 14px; }
.transfer-msg.ok { background: #E8F5EC; color: #1E5B32; }
.transfer-msg.warn { background: #FFF4E5; color: #7A4B00; }
.transfer-msg.stop { background: #FDECEC; color: #8A1F1F; }
.transfer-confirm { margin-top: 10px; padding: 12px 14px; border-radius: 10px; border: 1px solid #E3C27A; background: #FFFBF2; }
.transfer-part .transfer-confirm p { margin: 0 0 10px; color: var(--text); }
.transfer-foot { margin: 20px 0 0; padding-top: 14px; border-top: 1px solid var(--line); font-size: 13px; color: var(--sub); }
@media (max-width: 759px) {
  .transfer-body { padding: 4px 14px 16px; }
  .transfer-code { font-size: 16px; }
}

/* 実験室 /lab/(最小。inc/lab-page.php・見本 app/docs/review/2026-10-09-experiment-card/)。
   ゲーム以外のページなので、主役色はブランドの色。版の切り替えはゲームの実験カードと同じセグメント型 */
.lab-rules { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; max-width: 800px; margin: 20px 0 0; padding: 0; list-style: none; }
.lab-rules li { padding: 12px 14px; border-radius: 12px; background: var(--card); border: 1px solid var(--line); font-size: 14px; }
.lab-rules b { display: block; color: var(--accent); }
.lab-sec { max-width: 720px; margin-top: 32px; }
.lab-sec h2 { margin: 0 0 12px; font-size: 20px; }
.lab-how, .lab-none, .lab-optout p { font-size: 14px; color: var(--sub); }
.lab-run { margin-top: 12px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); }
.lab-run-head { display: flex; align-items: center; gap: 8px; }
.lab-tag { display: inline-block; padding: 0 10px; border-radius: 999px; background: #EEF2F6; color: var(--sub); font-size: 11px; font-weight: 700; line-height: 20px; }
.lab-game { font-size: 12px; color: var(--sub); }
.lab-run h3 { margin: 8px 0 0; font-size: 16px; }
.lab-run p { margin: 4px 0 0; font-size: 14px; color: var(--sub); }
.lab-play { display: inline-block; margin-top: 8px; font-size: 14px; font-weight: 700; }
.lab-optout[hidden], .lab-msg[hidden] { display: none; }
.lab-seg { display: flex; gap: 2px; max-width: 360px; padding: 3px; background: #EEF2F6; border-radius: 12px; }
.lab-seg button {
  flex: 1; min-height: 44px; padding: 0 8px; border: 2px solid transparent; border-radius: 9px; background: transparent;
  color: var(--sub); font-family: var(--font); font-size: 14px; font-weight: 700; cursor: pointer;
}
.lab-seg button[aria-pressed="true"] { background: #FFFFFF; color: var(--text); border-color: var(--accent); }
.lab-seg button[aria-pressed="true"]::before { content: "✓"; margin-right: 6px; } /* 選択中の印(塗りだけだと、普通のボタンと見分けにくい) */
.lab-seg button:disabled { opacity: .55; cursor: default; }
.lab-msg { margin: 10px 0 0; padding: 10px 12px; border-radius: 8px; background: #F4F6F8; }
@media (max-width: 759px) {
  .lab-rules { grid-template-columns: minmax(0, 1fr); }
}

/* 番号つきの手順(画面案 MainB2・VariantB の遊び方。番号は並び順) */
.card ol, .box ol { margin: 0 0 12px; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 12px; counter-reset: step; }
.card ol:last-child, .box ol:last-child { margin-bottom: 0; }
.card ol > li, .box ol > li { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; counter-increment: step; }
.card ol > li::before, .box ol > li::before {
  content: counter(step); flex-shrink: 0; width: 28px; height: 28px; border-radius: 8px; background: #E8EEF5;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-num); font-weight: 700; font-variant-numeric: tabular-nums; font-size: 14px;
}

table.controls, table.diff { width: 100%; border-collapse: collapse; font-size: 14px; }
table.controls th, table.controls td, table.diff th, table.diff td { padding: 10px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
table.diff thead th { font-size: 13px; color: var(--sub); }
table.controls + p, table.diff + p, .controls-more + p { margin-top: 12px; }
/* 違いの表の下のタイルの絵(見本 app/docs/review/2026-10-08-diff-tiles/) */
.tile-strip { margin: 16px 0 12px; }
.tile-strip:last-child { margin-bottom: 0; }
.tile-strip figcaption { font-size: 13px; color: var(--sub); margin-bottom: 8px; }
.tile-strip ul { margin: 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 8px 6px; }
.tile-strip li { width: 44px; display: flex; flex-direction: column; align-items: center; gap: 2px; }
.tile-strip img { width: 40px; height: 40px; display: block; }
.tile-strip span { font-family: var(--font-num); font-size: 12px; font-weight: 700; color: var(--sub); }
/* 操作方法(画面案: キー・操作 | アクション。そのほかは折りたたむ) */
table.controls { table-layout: fixed; }
table.controls caption { caption-side: top; text-align: left; padding: 0 0 6px; font-size: 13px; font-weight: 700; color: var(--sub); }
table.controls thead th { padding-top: 0; font-size: 12px; font-weight: 500; color: var(--sub); }
table.controls tbody th { font-weight: 500; }
table.controls tbody td { color: var(--sub); }
.controls-more { margin-top: 14px; }
.controls-more summary {
  min-height: 44px; padding: 0 14px; display: flex; align-items: center; justify-content: space-between; gap: 8px;
  border: 1px solid #C3CCD5; border-radius: 10px; background: var(--card); font-size: 14px; font-weight: 700; cursor: pointer; list-style: none;
}
.controls-more summary::-webkit-details-marker { display: none; }
.controls-more summary::after {
  content: ""; flex-shrink: 0; width: 8px; height: 8px; margin-right: 4px;
  border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: translateY(-2px) rotate(45deg);
}
.controls-more[open] summary::after { transform: translateY(2px) rotate(-135deg); }
.controls-more table { margin-top: 4px; }
kbd {
  display: inline-block; min-width: 1.8em; padding: 0 6px; border: 1px solid #8FA9CF; border-radius: 6px;
  background: var(--card); font-family: var(--font); font-size: 13px; line-height: 1.8; text-align: center;
}

/* 枠なしの節(画面案: 見出し + 説明文 + 中のカード) */
.open-sec { padding-top: 56px; }
.open-sec h2 { margin: 0 0 16px; font-size: 26px; line-height: 1.4; font-weight: 900; }
.open-sec h2 + .lead { margin: -10px 0 20px; font-size: 15px; color: var(--sub); }

/* アレンジのカード(MainB2・VariantB) */
.arr-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.arr-card {
  display: flex; gap: 14px; align-items: center; padding: 16px;
  background: var(--card); border: 1px solid var(--line); border-radius: 14px; text-decoration: none; color: var(--text);
}
.arr-card:hover { color: var(--text); border-color: #A9B6C3; }
.arr-icon {
  flex-shrink: 0; width: 56px; height: 56px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-num); font-weight: 700; font-variant-numeric: tabular-nums; font-size: 20px;
  background: #E8EEF5; color: var(--text);
}
.arr-icon.v-4 { background: #D3E0F0; }
.arr-icon.v-8 { background: #A9C4E6; }
.arr-icon.v-16 { background: #7FA6DA; }
.arr-icon.v-32 { background: #5688CC; }
.arr-icon.v-64 { background: #3A6AB0; color: #FFFFFF; }
.arr-icon.v-128 { background: #2B5594; color: #FFFFFF; font-size: 18px; }
.arr-icon.v-256 { background: #22447A; color: #FFFFFF; font-size: 18px; }
.arr-name { display: block; font-weight: 700; font-size: 15px; }
.arr-line { display: block; font-size: 13px; color: var(--sub); }
.badge-new {
  display: inline-block; margin-left: 6px; padding: 0 8px; border-radius: 999px; background: var(--accent); color: #FFFFFF;
  font-size: 11px; font-weight: 700; line-height: 18px; vertical-align: middle;
}
.arr-links { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 14px; }
.arr-links a { display: inline-block; padding: 6px 0; font-size: 14px; font-weight: 700; }
@media (max-width: 759px) {
  .open-sec { padding-top: 40px; }
  .open-sec h2 { font-size: 22px; }
  .open-sec h2 { margin-bottom: 12px; }
  .open-sec h2 + .lead { margin: -8px 0 14px; font-size: 14px; }
  /* スマホ(画面案 Mobile): 2 列のまま、印を上に小さく */
  .arr-grid { gap: 10px; }
  .arr-card { display: block; padding: 12px; border-radius: 12px; }
  .arr-icon { width: 40px; height: 40px; border-radius: 8px; font-size: 16px; }
  .arr-icon.v-128, .arr-icon.v-256 { font-size: 14px; }
  .arr-name { margin-top: 8px; font-size: 14px; }
  .arr-line { font-size: 12px; }
}

/* 枠なしの節の中の白いカード(画面案 MainB2・VariantB) */
.box { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px; }
.box p { margin: 0 0 12px; }
.box p:last-child, .box ul:last-child { margin-bottom: 0; }
.box h3, .stack-talk h3 { margin: 0 0 12px; font-size: 18px; line-height: 1.4; font-weight: 900; }
.stack { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
.stack .box { font-size: 14px; }
/* 特徴とルールの中・コツの吹き出しの中の箇条書き: シリーズの色の点(画面案 MainB2) */
.stack .box ul, .talk-bubble ul { margin: 0 0 12px; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 10px; }
.stack .box ul > li, .talk-bubble ul > li { display: flex; gap: 10px; align-items: flex-start; }
.stack .box ul > li::before, .talk-bubble ul > li::before { content: ""; flex-shrink: 0; width: 6px; height: 6px; margin-top: 10px; border-radius: 50%; background: var(--accent); }
/* コツ: サンクツ(黒うさぎ)の顔 + 吹き出し(2026-10-09。見本 app/docs/review/2026-10-09-tips-bubble/)。しっぽは線と塗りの 2 枚の三角 */
.talk { display: flex; gap: 14px; align-items: flex-start; }
.talk-who { flex-shrink: 0; width: 72px; text-align: center; font-size: 11px; font-weight: 700; line-height: 1.4; color: var(--sub); }
.talk-who img { display: block; width: 72px; height: 72px; border-radius: 50%; background: var(--card); border: 1px solid var(--line); }
.talk-who span { display: block; margin-top: 4px; }
.talk-bubble { position: relative; flex: 1; min-width: 0; background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 16px 20px; font-size: 15px; }
.stack .talk-bubble { font-size: 14px; }
.talk-bubble p { margin: 0 0 12px; }
.talk-bubble > :last-child { margin-bottom: 0; }
.talk-bubble::before, .talk-bubble::after { content: ""; position: absolute; border-style: solid; border-color: transparent; }
.talk-bubble::before { top: 26px; left: -11px; border-width: 9px 11px 9px 0; border-right-color: var(--line); }
.talk-bubble::after { top: 27px; left: -9px; border-width: 8px 10px 8px 0; border-right-color: var(--card); }
@media (max-width: 759px) {
  /* 狭い幅: 顔と名前を上に横並び、吹き出しは下。しっぽは上へ */
  .talk { flex-direction: column; gap: 10px; }
  .talk-who { display: flex; align-items: center; gap: 8px; width: auto; font-size: 12px; }
  .talk-who img { width: 48px; height: 48px; }
  .talk-who span { margin: 0; }
  .talk-bubble { padding: 14px 16px; }
  .talk-bubble::before { top: -11px; left: 16px; border-width: 0 9px 11px; border-color: transparent transparent var(--line); }
  .talk-bubble::after { top: -9px; left: 17px; border-width: 0 8px 10px; border-color: transparent transparent var(--card); }
}
/* 勘所(アレンジ): 3 列のカード(画面案 VariantB)。スマホは 1 列(VariantMobile) */
.mech-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.mech-grid h3 { margin: 0 0 8px; }
.mech-grid p { font-size: 14px; color: var(--sub); }
@media (max-width: 759px) {
  .mech-grid { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .mech-grid .box { padding: 16px; }
  .mech-grid h3 { margin-bottom: 6px; font-size: 16px; }
  .mech-grid p { font-size: 13px; }
}
.sec-diff .box, .sec-changes .box { border-radius: 16px; }
.sec-diff .box { padding: 24px; }

/* よくある質問: 質問ごとに 1 枚 */
dl.faq { margin: 0; display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
.faq-item dt { margin: 0 0 6px; font-size: 16px; font-weight: 900; }
.faq-item dd { margin: 0; font-size: 14px; color: var(--sub); }
.faq-item dd p { margin: 0 0 8px; }
.faq-item dd p:last-child { margin-bottom: 0; }

ul.changes { list-style: none; margin: 0; padding: 0; }
/* 最近の更新: 日付は「月-日」、札は種類ごとの色 */
.sec-changes .box { padding: 12px 24px 16px; }
ul.changes li { display: flex; align-items: center; gap: 16px; padding: 12px 0; border-top: 1px solid #E4E9EE; }
ul.changes time { flex-shrink: 0; width: 84px; font-family: var(--font-num); font-variant-numeric: tabular-nums; font-size: 14px; color: var(--sub); }
code, pre { font-family: var(--font-code); }
.kind { flex-shrink: 0; display: inline-block; min-width: 48px; padding: 0 10px; border-radius: 999px; font-size: 12px; font-weight: 700; line-height: 22px; text-align: center; }
.kind-add { background: #EAF1FB; color: #174A94; }
.kind-improve { background: #F1ECF8; color: #5B2E8A; }
.kind-fix { background: #FFF3E0; color: #8A4B00; }
.change-text { font-size: 15px; }
@media (max-width: 759px) {
  .box { padding: 18px 16px; }
  .sec-changes .box { padding: 8px 16px 12px; }
  ul.changes li { flex-wrap: wrap; gap: 4px 12px; }
  ul.changes time { width: auto; }
  .change-text { flex-basis: 100%; font-size: 14px; }
}

/* 固定ページ・404(app/docs/TEMPLATES.md §4-3・§4-4) */
.static-page .prose { line-height: 1.9; }
.link-list { margin: 16px 0 0; padding-left: 1.2em; line-height: 2; }

/* ゲーム一覧(app/docs/TEMPLATES.md §4-1。画面案 Games / GamesMobile) */
.list-lead { max-width: 800px; color: var(--sub); }
.list-tiles { padding-top: 24px; }
.sort { display: flex; gap: 8px; margin-bottom: 16px; }
.sort button {
  min-height: 44px; padding: 0 18px; border: 1px solid #C3CCD5; border-radius: 10px; background: #FFFFFF; color: var(--text);
  font-family: inherit; font-size: 14px; font-weight: 700; cursor: pointer;
}
.sort button[aria-pressed="true"] { border-color: var(--accent); background: var(--accent); color: #FFFFFF; }
.tile-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.game-tile {
  display: block; padding: 12px; background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  text-decoration: none; color: var(--text);
}
.game-tile:hover { color: var(--text); border-color: #A9B6C3; }
.thumb {
  display: flex; align-items: center; justify-content: center; aspect-ratio: 4 / 3;
  background: #1D2B3A; border-radius: 10px; overflow: hidden;
}
.thumb-board { width: 62%; aspect-ratio: 1 / 1; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 4px; }
.thumb-t {
  display: flex; align-items: center; justify-content: center; border-radius: 7px; background: rgba(255, 255, 255, .08);
  font-family: var(--font-num); font-weight: 700; font-size: 13px; color: var(--text);
}
/* 2048 のサムネは、ゲームの既定色(DESIGN 5-16 のオレンジ。利用者の選択には連動しない) */
.thumb:has(> .thumb-board) { background: #34271D; }
.thumb-t.v-2 { background: #F4EFEB; }
.thumb-t.v-4 { background: #EDDFD4; }
.thumb-t.v-8 { background: #E9C0A0; }
.thumb-t.v-16 { background: #E7A06A; }
.thumb-t.v-32 { background: #E98335; }
.thumb-t.v-64 { background: #D56815; }
.thumb-t.v-128 { background: #AE5713; color: #FFFFFF; font-size: 11px; }
.thumb-t.v-256 { background: #914912; color: #FFFFFF; font-size: 11px; }
.tile-name { display: block; margin-top: 10px; font-weight: 700; font-size: 15px; }
.tile-line { display: block; font-size: 13px; color: var(--sub); }
.badge-upd, .badge-count {
  display: inline-block; margin-left: 6px; padding: 0 8px; border-radius: 999px;
  font-size: 11px; font-weight: 700; line-height: 18px; vertical-align: middle;
}
.badge-upd { background: #EAF1FB; color: #174A94; }
.badge-count { background: #EEF2F6; color: var(--sub); }
.table-scroll { overflow-x: auto; }
.quick { width: 100%; border-collapse: collapse; font-size: 14px; }
.quick th, .quick td { padding: 10px 12px 10px 0; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
.quick thead th { padding-top: 0; font-size: 12px; font-weight: 500; color: var(--sub); }
.quick tbody th { font-weight: 700; white-space: nowrap; }
/* 短い列(見出し・ジャンル・目安)は折り返さない。内容と操作の列が伸び縮みする */
.quick thead th, .quick td:nth-child(2), .quick td:nth-child(5) { white-space: nowrap; }
.genre-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.genre h3 { margin: 0 0 8px; font-size: 18px; font-weight: 900; }
.genre p { margin: 0 0 10px; font-size: 14px; color: var(--sub); }
.genre .genre-games { margin: 0; color: var(--text); }
.genre-games a { font-weight: 700; }
@media (max-width: 759px) {
  .tile-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .sort button { flex-grow: 1; }
  .thumb-t { font-size: 9px; border-radius: 5px; }
  .thumb-t.v-128, .thumb-t.v-256 { font-size: 8px; }
  .genre-grid { grid-template-columns: 1fr; }
  .quick { min-width: 560px; }
}

/* トップ(app/docs/TEMPLATES.md §4-2。画面案 Top / TopMobile) */
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; align-items: center; padding: 28px 0 8px; }
.hero-label { display: inline-block; padding: 2px 14px; border-radius: 999px; background: #EAF1FB; color: #174A94; font-size: 13px; font-weight: 700; }
.hero-title { margin: 14px 0 0; font-size: 44px; line-height: 1.25; font-weight: 900; }
.hero-lead { margin-top: 16px; font-size: 17px; color: var(--sub); }
.hero-lead p { margin: 0; }
.hero-actions { display: flex; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; min-height: 52px; padding: 0 24px; border: 1px solid #C3CCD5; border-radius: 10px;
  background: #FFFFFF; color: var(--text); font-size: 16px; font-weight: 700; text-decoration: none;
}
.btn:hover { color: var(--text); border-color: #A9B6C3; }
.btn-primary { padding: 0 28px; border-color: var(--accent); background: var(--accent); color: #FFFFFF; }
.btn-primary:hover { color: #FFFFFF; filter: brightness(1.08); }
/* ヒーローのイラスト(DESIGN 5-9): PC は右の列(最大 560px)。スマホはヒーローに出さず、フッターの直前(最大 340px・中央) */
.hero-art { display: block; }
.hero-art img { display: block; width: 100%; max-width: 560px; height: auto; margin-left: auto; }
.hero-art-foot { display: none; }
.gates { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.gate { display: block; padding: 24px; background: var(--card); border: 1px solid var(--line); border-radius: 16px; text-decoration: none; color: var(--text); }
a.gate:hover { color: var(--text); border-color: #A9B6C3; }
.gate-icon {
  display: flex; width: 64px; height: 64px; border-radius: 50%; background: #1D2B3A; box-shadow: inset 0 0 0 5px #2B3E52;
  color: #FFFFFF; align-items: center; justify-content: center; font-size: 26px; font-weight: 900;
}
.gate-title { display: block; margin-top: 14px; font-size: 22px; font-weight: 900; }
.gate-text { display: block; margin: 6px 0 12px; font-size: 14px; color: var(--sub); }
.gate-more { display: block; font-size: 14px; font-weight: 700; color: var(--accent); }
.gate-soon .gate-more { color: var(--sub); }
.sec-more { margin-top: 14px; }
.sec-more a { display: inline-block; padding: 6px 0; font-size: 14px; font-weight: 700; }
.sec-changes .box, .sec-about .box { border-radius: 16px; }
a.change-text { color: var(--text); }
.link-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.link-card { display: block; text-decoration: none; color: var(--text); }
.link-card-title { display: block; font-size: 18px; font-weight: 900; }
.link-card-text { display: block; margin-top: 6px; font-size: 14px; color: var(--sub); }
.about { display: flex; gap: 28px; align-items: center; padding: 28px; }
.about img { flex-shrink: 0; width: 120px; height: 120px; }
.about-text p { margin: 0 0 8px; }
@media (max-width: 759px) {
  .hero { grid-template-columns: 1fr; gap: 0; padding: 12px 0 4px; }
  .hero-label { padding: 2px 12px; font-size: 12px; }
  .hero-title { margin-top: 12px; font-size: 28px; line-height: 1.3; }
  .hero-lead { margin-top: 12px; font-size: 14px; }
  .hero-actions { flex-direction: column; gap: 10px; margin: 18px 0 30px; }
  .btn { justify-content: center; width: 100%; }
  .hero-art { display: none; }
  .hero-art-foot { display: block; max-width: 340px; margin: 40px auto 0; }
  .hero-art-foot img { display: block; width: 100%; height: auto; }
  .gates { grid-template-columns: 1fr; gap: 10px; }
  .gate { display: grid; grid-template-columns: 52px minmax(0, 1fr); column-gap: 14px; align-items: center; padding: 14px; border-radius: 14px; }
  .gate-icon { grid-row: span 3; width: 52px; height: 52px; font-size: 22px; }
  .gate-title { margin-top: 0; font-size: 18px; }
  .gate-text { margin: 2px 0 4px; font-size: 13px; }
  .link-cards { grid-template-columns: 1fr; }
  .about { flex-direction: column; gap: 16px; padding: 20px; text-align: left; }
  .about img { width: 88px; height: 88px; }
}

/* ---- 柱(/game-design/。画面案 GameDesign / GameDesignMobile。TEMPLATES §8) ---- */
.article-head { max-width: 820px; padding: 4px 0 28px; }
.article-head .page-title { margin: 14px 0 0; font-size: 34px; line-height: 1.35; }
.article-lead { margin-top: 14px; font-size: 17px; }
.article-lead p { margin: 0 0 8px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 12px; font-size: 13px; color: var(--sub); }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 48px; align-items: start; }
.article-side { grid-column: 2; grid-row: 1; position: sticky; top: 24px; display: flex; flex-direction: column; gap: 16px; }
.article-body { grid-column: 1; grid-row: 1; min-width: 0; padding: 8px 40px 40px; border-radius: 16px; }
.article-body .prose { max-width: none; font-size: 16px; line-height: 1.8; }
.article-body .prose > h2 { display: flex; align-items: center; gap: 12px; margin: 48px 0 14px; font-size: 26px; line-height: 1.4; font-weight: 900; scroll-margin-top: 16px; }
.article-body .prose > h3 { margin: 28px 0 10px; font-size: 19px; line-height: 1.4; font-weight: 900; }
.article-body .prose p { margin: 0 0 14px; }
.ch-num {
  flex-shrink: 0; width: 36px; height: 36px; border-radius: 10px; background: var(--accent); color: #FFFFFF;
  display: flex; align-items: center; justify-content: center; font-family: var(--font-num); font-size: 18px; font-variant-numeric: tabular-nums;
}
.toc { padding: 20px; }
.toc-title, .side-title { margin: 0 0 8px; font-size: 16px; font-weight: 900; }
.box.toc ol { display: block; margin: 0; padding: 0 0 0 1.4em; list-style: decimal; }
.box.toc ol > li { display: list-item; font-size: 14px; }
.box.toc ol > li::before { content: none; }
.toc a { display: block; padding: 8px 0; color: var(--text); text-decoration: none; }
.toc a:hover { color: var(--link); }
.side-examples { padding: 20px; }
.side-examples ul { margin: 0; padding: 0; list-style: none; }
.side-examples a { display: block; padding: 6px 0; font-size: 14px; font-weight: 700; }
.examples { display: flex; flex-direction: column; gap: 14px; margin-top: 16px; }
.example { display: flex; gap: 18px; align-items: flex-start; padding: 18px; }
.example .thumb { flex-shrink: 0; width: 160px; }
.example-name { display: block; font-size: 18px; font-weight: 900; line-height: 1.4; }
.article-body .prose .example-text { margin: 6px 0 0; font-size: 14px; color: var(--sub); }
.example-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.example-actions .btn { min-height: 44px; padding: 0 16px; font-size: 14px; }
.share { margin-top: 40px; padding-top: 24px; border-top: 1px solid #E4E9EE; }
.share h2 { margin: 0 0 6px; font-size: 20px; font-weight: 900; }
.share p { margin: 0 0 14px; font-size: 14px; color: var(--sub); }
.author { display: flex; gap: 16px; align-items: center; margin-top: 24px; padding: 20px; background: var(--bg); border-radius: 14px; }
.author img { flex-shrink: 0; width: 72px; height: 72px; }
.author p { margin: 4px 0 0; font-size: 14px; color: var(--sub); }
.author .author-title { margin: 0; font-size: 15px; font-weight: 900; color: var(--text); }
.author a { margin-left: 4px; font-weight: 700; }
@media (max-width: 1023px) {
  .article-layout { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .article-side, .article-body { grid-column: 1; grid-row: auto; position: static; }
  .side-examples { display: none; } /* 本文の「遊んで学ぶ実例」と重なるので、1 列のときは出さない */
}
@media (max-width: 759px) {
  .article-head .page-title { font-size: 26px; }
  .article-lead { font-size: 15px; }
  .article-body { padding: 4px 18px 24px; }
  .article-body .prose > h2 { margin-top: 36px; font-size: 22px; }
  .ch-num { width: 30px; height: 30px; font-size: 15px; }
  .toc { padding: 14px 16px; }
  .example { flex-direction: column; gap: 12px; }
  .example .thumb { width: 100%; max-width: 220px; }
}

/* ---- 制作ノート(/notes/<スラッグ>/。画面案 app/docs/review/2026-10-07-p6-notes/Note.html。TEMPLATES §9)。読み物の型は柱と同じ ---- */
.note-label { display: inline-block; padding: 2px 12px; border-radius: 999px; background: #F1ECF8; color: #5B2E8A; font-size: 13px; font-weight: 700; }
/* 冒頭(リード文・「遊ぶ」の案内)は、本文の欄と左右をそろえる(PC は右の欄 280px と間 48px を除いた幅。1 列のときは全幅) */
.note-page .article-head { max-width: calc(100% - 280px - 48px); }
.play-card { display: flex; gap: 18px; align-items: center; margin-top: 20px; padding: 16px 18px; }
.play-card .thumb { flex-shrink: 0; width: 120px; }
.play-card .thumb-board { gap: 3px; }
.play-card .thumb-t { font-size: 9px; border-radius: 4px; }
.play-card .thumb-t.v-128, .play-card .thumb-t.v-256 { font-size: 7px; }
.play-card-body { flex: 1; min-width: 0; }
.play-card-title { display: block; font-size: 17px; font-weight: 900; }
.play-card-text { display: block; margin-top: 2px; font-size: 14px; color: var(--sub); }
.play-card .btn { flex-shrink: 0; min-height: 44px; }
.decisions { display: grid; grid-template-columns: minmax(0, 1fr); gap: 14px; margin-top: 16px; }
.decision { padding: 18px 20px; }
.article-body .prose .decision h3 { margin: 0 0 6px; font-size: 17px; }
.article-body .prose .decision p { margin: 0; font-size: 15px; }
.decision .why { display: inline-block; margin-right: 6px; padding: 0 8px; border-radius: 6px; background: #EAF1FB; color: #174A94; font-size: 12px; font-weight: 700; }
.core-item + .core-item { margin-top: 28px; }
.core-item h3 { margin: 28px 0 10px; font-size: 19px; line-height: 1.4; font-weight: 900; }
pre.code { margin: 12px 0 0; padding: 16px 18px; border-radius: 12px; background: #1D2B3A; color: #E8EEF5; font-size: 13px; line-height: 1.7; overflow-x: auto; }
/* 動画(あるときだけ。本文の最初の章。preload="none" で、押すまでポスターの画像しか読まない) */
.video { margin-top: 0; aspect-ratio: 16 / 9; border-radius: 12px; overflow: hidden; background: #1D2B3A; }
.video video { display: block; width: 100%; height: 100%; object-fit: contain; }
.article-body .prose .video-cap { margin: 6px 0 0; font-size: 13px; color: var(--sub); }
/* 画面(スクリーンショット。本物のゲームの画面) */
figure.shot { margin: 16px 0 0; }
figure.shot img { display: block; width: 100%; max-width: 440px; height: auto; border: 1px solid var(--line); border-radius: 12px; }
figure.shot figcaption { margin-top: 6px; font-size: 13px; color: var(--sub); }
.decision figure.shot { margin-top: 12px; }
.decision figure.shot img { max-width: 360px; }
/* 実験の記録(計画中 → 実験中 → 採用 / 見送り。いまは計画中だけ) */
.exps { display: grid; gap: 14px; margin-top: 16px; }
.exp { padding: 16px 18px; }
.exp-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.article-body .prose .exp h3 { margin: 0; font-size: 16px; }
.exp-status { display: inline-block; padding: 1px 10px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.exp-status.s-plan { background: #EAF1FB; color: #174A94; }
.exp dl { display: grid; grid-template-columns: 6em minmax(0, 1fr); gap: 4px 12px; margin: 10px 0 0; font-size: 14px; }
.exp dt { color: var(--sub); }
.exp dd { margin: 0; }
.related-notes { margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--line); }
.article-body .prose .related-notes h2 { margin: 0; font-size: 18px; font-weight: 900; }
.related-notes ul { margin: 10px 0 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.related-notes a { font-weight: 700; }
.related-notes .rn-text { display: block; font-size: 13px; color: var(--sub); }
.arr-diffs { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 10px; }
.arr-diffs li { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px; }
.arr-diffs .arr-diff-name { font-weight: 900; }
.arr-diffs .arr-diff-text { display: block; font-size: 13px; color: var(--sub); }
.arr-diffs a { flex-shrink: 0; font-size: 14px; font-weight: 700; }
.side-game { padding: 20px; }
.side-game .btn { width: 100%; justify-content: center; margin-top: 8px; }
.side-game ul { margin: 12px 0 0; padding: 0; list-style: none; }
.side-game li a { display: block; padding: 6px 0; font-size: 14px; font-weight: 700; }
/* 一覧 /notes/ */
.notes-list { margin-top: 24px; }
.notes-empty { color: var(--sub); }
@media (max-width: 1023px) {
  .side-game { display: none; } /* 冒頭の「遊ぶ」の案内と重なるので、1 列のときは出さない */
  .note-page .article-head { max-width: none; }
}
@media (max-width: 759px) {
  .play-card { flex-wrap: wrap; }
  .play-card .thumb { width: 96px; }
  .play-card .btn { width: 100%; }
  .arr-diffs li { flex-direction: column; align-items: flex-start; }
}