/* 少年ニンジャ 共通スタイル (トップ・連載ページ・about・privacy・404) */
:root{
  --red:#D9381E; --yellow:#FFD800; --ink:#161616; --paper:#fff;
  --muted:#666; --line:#e4e4e4; --soft:#f6f4ee;
  --font:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic","Noto Sans JP",sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font);line-height:1.7;overflow-wrap:anywhere}
img{max-width:100%}
a{color:inherit}
.wrap{max-width:1040px;margin:0 auto;padding:0 16px;padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}
:focus-visible{outline:3px solid var(--ink);outline-offset:2px}

/* ヘッダー (ロゴ B7 = 黒地に朱の線) */
.sn-header{background:var(--ink);border-bottom:4px solid var(--red)}
.sn-header-in{max-width:1040px;margin:0 auto;height:72px;padding:0 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.sn-logo{display:block;line-height:0;flex:none}
.sn-logo img{height:60px;width:auto;display:block}
.sn-nav{display:flex;gap:6px;flex-wrap:nowrap}
.sn-nav a{color:#fff;text-decoration:none;font-weight:800;font-size:14px;padding:8px 10px;border-radius:4px;white-space:nowrap}
.sn-nav a:hover{background:rgba(255,255,255,.12)}
@media (max-width:520px){
  .sn-nav a:last-child{display:none}
  .sn-logo img{height:48px}
  .sn-header-in{height:62px}
}

/* フッター */
.sn-footer{background:var(--ink);color:#ddd;margin-top:56px;padding:28px 0 36px;font-size:13px}
.sn-footer p{margin:0 0 10px}
.sn-links{display:flex;flex-wrap:wrap;gap:6px 20px}
.sn-links a{color:#fff}
.sn-copy{color:#999}

/* 非公式表記・題の折り返し: 語のまとまり / 最後の2字は途中で切らない */
.nb,.nw{display:inline-block}
h1,h2,h3,.ep-name,.card-name,.rank-name{text-wrap:balance}

/* 見出し */
.sec{margin-top:40px}
.sec-title{margin:0 0 16px;font-size:20px;font-weight:900;line-height:1.3;padding-left:12px;border-left:8px solid var(--red);letter-spacing:.04em}
.sec-title small{font-size:12px;font-weight:700;color:var(--muted);margin-left:8px;letter-spacing:0}

/* サムネ: 1ページ目を切らずに全体表示 (余白は連載の地色) */
.thumb{display:block;background:var(--ground,#222);aspect-ratio:720/1018;overflow:hidden;border:2px solid var(--ink);flex:none}
.thumb img{width:100%;height:100%;object-fit:contain;display:block}

/* バナー */
.banner{position:relative;background:var(--ink);overflow:hidden;touch-action:pan-y}
.bn-track{position:relative;height:clamp(300px,34vw,380px)}
.bn-slide{position:absolute;inset:0;display:flex;align-items:center;gap:clamp(14px,4vw,40px);padding:20px max(16px,calc((100% - 1008px)/2)) 44px;color:#fff;text-decoration:none;background:var(--ground);opacity:0;visibility:hidden;transition:opacity .5s ease,visibility .5s}
.bn-slide.on{opacity:1;visibility:visible}
.bn-slide .bn-cover{height:100%;flex:none;aspect-ratio:720/1018;background:var(--ground);box-shadow:0 0 0 3px var(--yellow),0 0 0 6px var(--ink)}
.bn-slide .bn-cover img{width:100%;height:100%;object-fit:contain;display:block}
.bn-text{min-width:0}
.bn-chip{display:inline-block;background:var(--yellow);color:var(--ink);font-weight:900;font-size:12px;padding:2px 10px;margin-bottom:8px;letter-spacing:.08em}
.bn-title{margin:0;font-size:clamp(24px,5vw,44px);font-weight:900;line-height:1.2;letter-spacing:.04em}
.bn-sub{margin:4px 0 0;font-size:clamp(12px,2.2vw,16px);color:#ddd}
.bn-syn{margin:10px 0 0;font-size:clamp(12px,2vw,15px);color:#eee;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.bn-go{display:inline-block;margin-top:14px;background:var(--red);color:#fff;font-weight:900;padding:8px 22px;border:2px solid #fff;border-radius:999px;font-size:15px}
.bn-dots{position:absolute;left:0;right:0;bottom:8px;display:flex;justify-content:center;gap:4px;z-index:2}
.bn-dot{width:32px;height:32px;border:0;background:none;cursor:pointer;padding:0;display:flex;align-items:center;justify-content:center}
.bn-dot::before{content:"";width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,.45);border:2px solid var(--ink)}
.bn-dot[aria-current="true"]::before{background:var(--yellow)}
@media (max-width:520px){.bn-syn{-webkit-line-clamp:4}.bn-go{padding:6px 18px;font-size:14px}}

/* 新着 */
.cards{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 14px}
@media (min-width:640px){.cards{grid-template-columns:repeat(4,minmax(0,1fr))}}
.card{display:block;text-decoration:none}
.card .thumb{width:100%}
.card:hover .thumb{box-shadow:4px 4px 0 var(--red)}
.card-series{display:block;margin-top:8px;font-size:12px;color:var(--muted);font-weight:700;line-height:1.4}
.card-name{display:block;font-weight:900;font-size:15px;line-height:1.4}
.card-date{display:block;font-size:12px;color:var(--muted)}
.new-chip{display:inline-block;background:var(--red);color:#fff;font-size:11px;font-weight:900;padding:0 6px;margin-right:6px;vertical-align:1px}

/* ランキング */
.rank{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.rank li a{display:flex;align-items:center;gap:12px;text-decoration:none;padding:10px;border:2px solid var(--ink);background:#fff}
.rank li a:hover{background:var(--soft)}
.rank-no{flex:none;width:34px;text-align:center;font-size:30px;font-weight:900;font-style:italic;line-height:1;color:var(--red)}
.rank li:nth-child(n+4) .rank-no{color:var(--ink);font-size:24px}
.rank .thumb{width:48px}
.rank-body{min-width:0;flex:1}
.rank-name{display:block;font-weight:900;line-height:1.35}
.rank-series{display:block;font-size:12px;color:var(--muted)}
.rank-count{flex:none;font-weight:900;color:var(--red);font-size:17px;white-space:nowrap}
.rank-count::before{content:"♡ "}

/* 連載一覧 */
.series-list{list-style:none;margin:0;padding:0;display:grid;gap:14px}
@media (min-width:760px){.series-list{grid-template-columns:repeat(2,minmax(0,1fr))}}
.series-row{display:flex;gap:14px;text-decoration:none;padding:12px;border:2px solid var(--ink);background:#fff;height:100%}
.series-row:hover{box-shadow:5px 5px 0 var(--yellow),5px 5px 0 2px var(--ink)}
.series-row .thumb{width:88px}
.series-row h3{margin:0;font-size:19px;font-weight:900;line-height:1.3}
.series-row .sub{margin:2px 0 6px;font-size:12px;color:var(--muted);font-weight:700}
.series-row .syn{margin:0;font-size:13px;line-height:1.6}
.series-row .meta{margin:8px 0 0;font-size:12px;color:var(--red);font-weight:900}

/* 連載ページ */
.s-head{background:var(--ground,#222);color:#fff;padding:24px 0}
.s-head .wrap{display:flex;gap:clamp(14px,4vw,32px);align-items:flex-start}
.s-head .thumb{width:clamp(110px,26vw,190px);box-shadow:0 0 0 3px var(--yellow),0 0 0 6px var(--ink);margin:3px}
.s-head h1{margin:0;font-size:clamp(24px,5.5vw,40px);font-weight:900;line-height:1.25;letter-spacing:.03em}
.s-head .sub{margin:4px 0 0;color:#ddd;font-size:14px}
.s-head .author{margin:6px 0 0;color:#ccc;font-size:12px}
.s-head .syn{margin:12px 0 0;font-size:14px;color:#f0f0f0}
.s-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.btn{display:inline-block;text-decoration:none;font-weight:900;font-size:14px;padding:9px 20px;border:2px solid var(--ink);border-radius:999px;background:#fff;color:var(--ink)}
.btn.primary{background:var(--red);color:#fff;border-color:#fff}
.ep-list{list-style:none;margin:0;padding:0;border-top:2px solid var(--ink)}
.ep-list li a{display:flex;gap:14px;align-items:center;padding:12px 4px;border-bottom:2px solid var(--line);text-decoration:none}
.ep-list li a:hover{background:var(--soft)}
.ep-list .thumb{width:64px}
.ep-body{flex:1;min-width:0}
.ep-name{display:block;font-weight:900;font-size:17px;line-height:1.35}
.ep-date{display:block;font-size:12px;color:var(--muted)}
.ep-yoki{flex:none;font-weight:900;color:var(--red);white-space:nowrap;font-size:15px}
.ep-yoki::before{content:"♡ "}

/* 読み物ページ (about / privacy / 404) */
.doc{max-width:720px;margin:0 auto;padding:32px 16px 0}
.doc h1{font-size:26px;font-weight:900;margin:0 0 16px;padding-left:12px;border-left:8px solid var(--red);line-height:1.3}
.doc h2{font-size:18px;font-weight:900;margin:32px 0 8px}
.doc p,.doc li{font-size:15px}
.doc ul{padding-left:1.3em}
.doc a{color:var(--red);font-weight:700}
.author-box{margin-top:28px;border:2px solid var(--ink);padding:14px 16px;background:var(--soft)}
.author-box h2{margin:0 0 6px;font-size:16px}
.author-box p{margin:0}
.notfound{text-align:center;padding:56px 16px 0}
.notfound img{width:120px;height:120px}
.notfound p{margin:8px 0 16px}

/* スマホ: 文字は 14px 以上 (足元の表記・日付・作者・©・小見出しなど) */
@media (max-width:640px){
  .sn-footer{font-size:14px}
  .sec-title small,.bn-chip,.bn-sub,.bn-syn,.new-chip,.card-series,.card-date,.rank-series,
  .series-row .sub,.series-row .syn,.series-row .meta,.s-head .author,.ep-date{font-size:14px}
  .card-series,.card-date,.ep-date{line-height:1.5}
}
.bn-sub,.sub,.syn,.ep-date,.card-series{text-wrap:balance}