:root{--bg:#fff;--soft:#f4f5f7;--line:#e3e5ea;--text:#35353a;--sub:#6b6f7a;--accent:#14b8d4;--accent-dark:#0e8fa6;--ok:#14a05a}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Noto Sans JP","Hiragino Sans","Yu Gothic",Meiryo,sans-serif;font-size:16px;line-height:1.7}
a{color:inherit}
img{max-width:100%}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}

/* ヘッダー */
.header{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
.header .wrap{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;min-height:56px}
.menu-btn{justify-self:start;width:44px;height:44px;border:0;background:none;cursor:pointer;display:flex;align-items:center;justify-content:center}
.menu-btn span,.menu-btn span::before,.menu-btn span::after{display:block;width:22px;height:2px;background:var(--text);content:"";position:relative}
.menu-btn span::before{position:absolute;top:-7px}
.menu-btn span::after{position:absolute;top:7px}
.logo{font-size:clamp(18px,4.6vw,24px);font-weight:900;letter-spacing:.04em;text-decoration:none;color:var(--accent-dark);text-align:center}
.logo small{display:block;font-size:11px;font-weight:700;color:var(--sub);letter-spacing:.1em;line-height:1}
.login{justify-self:end;min-height:40px;padding:6px 14px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--sub);font-size:14px;font-family:inherit;cursor:not-allowed}
.drawer{position:fixed;inset:0 auto 0 0;z-index:30;width:min(80vw,300px);padding:72px 20px 20px;background:#fff;border-right:1px solid var(--line);transform:translateX(-100%);transition:transform .2s}
.drawer.open{transform:none}
.drawer a{display:block;padding:14px 4px;border-bottom:1px solid var(--line);text-decoration:none;font-weight:700}
.scrim{position:fixed;inset:0;z-index:25;background:rgba(0,0,0,.35);display:none}
.scrim.open{display:block}
.drawer-close{position:absolute;top:10px;right:10px;width:44px;height:44px;border:0;background:none;font-size:28px;cursor:pointer}

/* ヒーロー */
.hero{position:relative;margin-top:16px}
.hero-track{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;border-radius:16px}
.hero-track::-webkit-scrollbar{display:none}
.slide{position:relative;flex:0 0 100%;scroll-snap-align:center;aspect-ratio:16/7;min-height:220px;display:flex;align-items:flex-end;color:#fff;text-decoration:none;background-size:cover;background-position:center}
.slide::before{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(0,0,0,.72),rgba(0,0,0,.05) 65%)}
.slide .cap{position:relative;padding:20px 24px;max-width:720px}
.slide .cap b{display:block;font-size:clamp(22px,5vw,38px);line-height:1.3;font-weight:900}
.slide .cap span{display:block;margin-top:4px;font-size:16px}
.s1{background-image:linear-gradient(135deg,#ffb703,#fb5607);background-image:url(assets/hero-kinniku.jpg),url(assets/kinniku.png),linear-gradient(135deg,#ffb703,#fb5607)}
.s2{background-image:url(assets/hero-haibyoto.jpg),url(assets/haibyoto.webp),linear-gradient(135deg,#243b55,#141e30)}
.arrow{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border:0;border-radius:50%;background:rgba(255,255,255,.9);font-size:22px;cursor:pointer;box-shadow:0 1px 6px rgba(0,0,0,.25)}
.arrow.prev{left:8px}
.arrow.next{right:8px}
.dots{display:flex;justify-content:center;gap:6px;margin:12px 0 0}
.dot{width:12px;height:12px;border:0;border-radius:50%;background:#cfd3da;cursor:pointer;padding:0}
.dot.on{background:var(--accent)}

/* 検索 */
.search{display:flex;max-width:480px;margin:20px auto 0;border-radius:10px;background:var(--soft);overflow:hidden}
.search input{flex:1;min-width:0;padding:14px 16px;border:0;background:none;font-size:16px;font-family:inherit;color:var(--text)}
.search button{width:52px;border:0;background:var(--accent);color:#fff;font-size:20px;cursor:pointer}

/* セクション */
section.block{padding:40px 0 8px}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:0 0 16px}
.sec-head h2{margin:0;font-size:clamp(22px,4.4vw,28px);font-weight:900}
.sec-head a{color:var(--sub);font-size:14px}
.band{background:var(--soft);margin-top:32px;padding-bottom:40px}

/* ゲームカード */
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.card{display:block;text-decoration:none;border-radius:12px;overflow:hidden;background:#fff;border:1px solid var(--line)}
.thumb{aspect-ratio:4/3;background-size:cover;background-position:center;position:relative}
.t1{background-image:url(assets/card-kinniku.jpg),url(assets/kinniku.png),linear-gradient(135deg,#ffb703,#fb5607)}
.t2{background-image:url(assets/card-haibyoto.jpg),url(assets/haibyoto.webp),linear-gradient(135deg,#243b55,#141e30)}
.t3{background-image:url(assets/ptstudy-list.png),linear-gradient(135deg,#14b8d4,#7c5cff);background-position:top center}
.s3{background-image:url(assets/ptstudy-battle.png),linear-gradient(135deg,#14b8d4,#7c5cff)}
.tag{position:absolute;left:8px;top:8px;padding:2px 10px;border-radius:999px;font-size:13px;font-weight:700;background:#fff}
.tag.ok{color:var(--ok)}
.tag.soon{color:var(--sub)}
.card .body{padding:12px 14px 16px}
.card h3{margin:0;font-size:18px;font-weight:700;line-height:1.4}
.card p{margin:6px 0 0;color:var(--sub);font-size:15px}
.card .go{display:inline-block;margin-top:10px;color:var(--accent-dark);font-weight:700}
.card.disabled{cursor:default}
.empty{display:none;margin:12px 0 0;color:var(--sub)}

/* カテゴリ */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{min-height:44px;padding:8px 18px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--text);font-size:16px;font-weight:700;font-family:inherit;cursor:pointer}
.chip.on{background:var(--accent);border-color:var(--accent);color:#fff}
.card .cats{display:block;margin-top:8px;color:var(--sub);font-size:14px}

/* お知らせ・会員 */
.news{list-style:none;margin:0;padding:0;background:#fff;border-radius:12px;border:1px solid var(--line)}
.news li{display:flex;gap:16px;padding:14px 16px;border-bottom:1px solid var(--line)}
.news li:last-child{border-bottom:0}
.news time{flex:0 0 auto;color:var(--sub);font-size:15px}
.member{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.plan{padding:20px;border-radius:12px;border:1px solid var(--line);background:#fff}
.plan h3{margin:0 0 6px;font-size:20px}
.plan p{margin:0;color:var(--sub)}
.plan.full{border-color:var(--accent)}
.more{display:block;width:fit-content;margin:20px auto 0;padding:12px 40px;border:1px solid var(--line);border-radius:8px;background:#fff;text-decoration:none;font-weight:700}

footer{margin-top:48px;padding:24px 0 40px;border-top:1px solid var(--line);color:var(--sub);font-size:14px;text-align:center}

@media (max-width:720px){
  .cards{grid-template-columns:1fr 1fr}
  .member{grid-template-columns:1fr}
  .slide{aspect-ratio:16/9;min-height:190px}
  .slide .cap{padding:16px}
}
@media (max-width:560px){
  .cards{grid-template-columns:1fr}
  .login{font-size:13px;padding:6px 10px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.drawer{transition:none}}
.card[hidden]{display:none}

/* MiTok風：キャッチ・カテゴリタイル・FAQ */
.catch{padding:28px 0 4px;text-align:center}
.catch h1{margin:0;font-size:clamp(26px,6vw,40px);font-weight:900;color:var(--accent-dark)}
.catch p{margin:6px 0 0;color:var(--sub)}
.sec-head .sub{color:var(--sub);font-size:14px}
.tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.tiles .chip{display:flex;flex-direction:column;align-items:flex-start;gap:2px;min-height:76px;padding:12px 14px;border-radius:12px;text-align:left}
.tiles .chip b{font-size:17px}
.tiles .chip .n{font-size:14px;font-weight:400;color:var(--sub)}
.tiles .chip.on .n{color:#fff}
.faq{border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden}
.faq details{border-bottom:1px solid var(--line)}
.faq details:last-child{border-bottom:0}
.faq summary{padding:16px;font-weight:700;cursor:pointer;list-style:none;position:relative;padding-right:44px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:16px;top:50%;transform:translateY(-50%);font-size:22px;color:var(--accent-dark)}
.faq details[open] summary::after{content:"−"}
.faq p{margin:0;padding:0 16px 16px;color:var(--sub)}
@media (max-width:720px){.tiles{grid-template-columns:repeat(2,1fr)}}

/* ===== ゲームの詳細画面（スマホ：縦に積む／PC：2列＋右に情報） ===== */
.detail-page{padding-bottom:84px}
.back{justify-self:start;display:flex;align-items:center;min-height:44px;padding:0 6px;font-weight:700;text-decoration:none;color:var(--accent-dark)}
.crumb{display:none;margin:16px 0 8px;font-size:14px;color:var(--sub)}
.crumb a{color:var(--sub)}
.d-head{display:flex;gap:16px;align-items:center;margin-top:16px}
.d-icon{flex:0 0 auto;width:88px;height:88px;border-radius:22%;background-size:cover;background-position:center;background-color:var(--soft);border:1px solid var(--line)}
.d-title h1{margin:0;font-size:clamp(22px,5.4vw,28px);line-height:1.35;font-weight:900}
.d-tagline{margin:4px 0 0;color:var(--sub);font-size:15px}
.d-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.d-tag{padding:2px 10px;border-radius:999px;background:var(--soft);font-size:13px;font-weight:700;color:var(--sub)}
.d-cta{margin-top:16px}
.cta{display:flex;align-items:center;justify-content:center;width:100%;min-height:52px;padding:12px 20px;border-radius:12px;background:var(--accent);color:#fff;font-size:18px;font-weight:900;text-decoration:none;border:0}
.cta-off{background:var(--soft);color:var(--sub)}
.d-sec{margin-top:28px}
.d-sec h2{margin:0 0 12px;font-size:20px;font-weight:900}
.shots{display:flex;gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:6px}
.shots img{flex:0 0 min(86%,420px);width:min(86%,420px);aspect-ratio:16/9;object-fit:cover;border-radius:12px;border:1px solid var(--line);scroll-snap-align:start}
.d-desc p{margin:0 0 12px;font-size:16px}
.d-notes{margin:0;padding-left:1.2em;color:var(--sub)}
.d-notes li{margin:4px 0}
.d-side{margin-top:28px}
.info{padding:16px;border:1px solid var(--line);border-radius:14px;background:#fff}
.info h2{margin:0 0 8px;font-size:18px}
.info dl{margin:0}
.info .row{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid var(--line)}
.info dt{color:var(--sub)}
.info dd{margin:0;font-weight:700;text-align:right}
.info .d-cta{display:none}
.sticky-cta{position:fixed;left:0;right:0;bottom:0;z-index:15;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.96);border-top:1px solid var(--line)}

@media (min-width:900px){
  .detail-page{padding-bottom:0}
  .sticky-cta{display:none}
  .crumb{display:block}
  .back{display:none}
  .header .wrap{grid-template-columns:1fr}
  .detail-page .logo{text-align:left}
  .d-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:40px;align-items:start}
  .d-head{margin-top:0;gap:24px}
  .d-icon{width:140px;height:140px}
  .d-title h1{font-size:34px}
  .d-tagline{font-size:17px}
  .d-cta-top{display:none}
  .d-side{margin-top:0;position:sticky;top:80px}
  .info .d-cta{display:block}
  .shots{display:grid;grid-template-columns:repeat(2,1fr);overflow:visible}
  .shots img{flex:none;width:100%}
  .shots img:only-child{grid-column:1 / -1}
}

.btn{display:inline-block;margin-top:16px;padding:12px 20px;border-radius:12px;background:var(--accent);color:#fff;font-weight:700;text-decoration:none}

/* 詳細画面の上の大きな画像（16:9） */
.d-banner{width:100%;aspect-ratio:16/9;margin-top:16px;border-radius:16px;background-size:cover;background-position:center;background-color:var(--soft);border:1px solid var(--line)}
@media (min-width:900px){.d-banner{margin-top:0;margin-bottom:24px}}