/* 正本＝docs/design-system.md。値を足すときは先にあちらを直す */
:root{
  --night:#17111a; --surface:#221a25; --line:#3b2f3f; --paper:#f6efe8; --ink:#302730; --ink-2:#5f4e5b; --rule:rgba(85,44,80,.16);
  --cream:#faf5f1; --sub:#c0b2bd; --poison:#8a4ea0; --poison-d:#7a4390; --pink:#d79aa6; --pen:#a12f2a; --danger:#8a3f3a;
  --nav:62px; --ruled:32px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;min-height:100dvh;display:flex;flex-direction:column;background:var(--night);color:var(--cream);font:400 15px/1.75 "Zen Kaku Gothic New",-apple-system,"Hiragino Sans",sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit}
h1,h2,h3,p{margin:0}
:focus-visible{outline:2px solid var(--pink);outline-offset:2px;border-radius:4px}
.display{font-weight:900;letter-spacing:.01em}
.vh,.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* 上の帯 */
header{background:var(--night);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.bar{max-width:1040px;margin:0 auto;padding:0 16px;display:flex;align-items:center;gap:8px;height:48px}
.logo{text-decoration:none;font-size:17px;white-space:nowrap}
.top-nav{margin-left:auto;display:none;gap:4px;align-items:center}
.top-nav a{text-decoration:none;font-size:14px;padding:8px 12px;border-radius:999px;color:var(--sub)}
.top-nav a:hover{color:var(--cream)}
.top-nav a.on{color:var(--cream);font-weight:700}
.top-nav a.go{background:var(--poison);color:#fff;font-weight:700;margin-left:8px}
.top-nav a.go:hover{background:var(--poison-d)}

main{flex:1 0 auto;width:100%;max-width:1040px;margin:0 auto;padding:0 16px 32px}

/* 下の固定タブ */
.tabs{position:fixed;left:0;right:0;bottom:0;z-index:20;display:grid;grid-template-columns:1fr 1fr 1.3fr 1fr 1fr;align-items:center;background:var(--night);border-top:1px solid var(--line);padding:6px 8px calc(6px + env(safe-area-inset-bottom));height:calc(var(--nav) + env(safe-area-inset-bottom))}
.tabs a{display:flex;align-items:center;justify-content:center;height:48px;text-decoration:none;font-size:13px;color:var(--sub)}
.tabs a.on{color:var(--cream);font-weight:700}
.tabs a.go{background:var(--poison);color:#fff;font-weight:700;font-size:15px;border-radius:999px}

/* 見出し：最初の画面に投稿を残すため短くする */
.hero{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 0 12px}
.hero h1{font-size:24px;line-height:1.35;word-break:keep-all}
.hero p{margin-top:4px;color:var(--sub);font-size:13px;line-height:1.6}
.hero .reaper{width:80px;height:80px;flex:none}

/* 新着と人気、分類 */
.toolbar{display:flex;gap:16px;align-items:center}
.toolbar a{display:flex;align-items:center;min-height:44px;text-decoration:none;color:var(--sub);font-size:15px;border-bottom:2px solid transparent}
.toolbar a.on{color:var(--cream);font-weight:700;border-color:var(--pen)}
.toolbar .count{margin-left:auto;font-size:12px;color:var(--sub)}
.chips{display:flex;gap:8px;overflow-x:auto;margin:8px -16px 12px;padding:0 16px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chips a{flex:none;display:flex;align-items:center;min-height:36px;text-decoration:none;font-size:13px;color:var(--sub);border-radius:999px;padding:0 12px;background:var(--surface)}
.chips a.on{background:var(--cream);color:var(--ink);font-weight:700}
.note-head{font-size:13px;color:var(--sub);margin:0 0 8px}

/* 1冊のノート。赤い余白線と罫線だけで構成する */
.notebook{background:var(--paper);color:var(--ink);border-radius:4px 12px 12px 4px;position:relative;overflow:hidden}
.notebook::before{content:"";position:absolute;left:32px;top:0;bottom:0;width:1px;background:var(--pen);opacity:.55}
.entry{display:grid;grid-template-columns:32px minmax(0,1fr);border-bottom:1px solid var(--rule)}
.entry:last-child{border-bottom:0}
.margin{padding-top:12px;text-align:center}
.rank{display:inline-block;font-weight:900;color:var(--pen);font-size:17px;line-height:1.4;transform:rotate(-6deg)}
.rank.two{font-size:13px}
.main{padding:12px 14px 4px 12px;min-width:0}
.read{display:block;text-decoration:none;border-radius:4px}
.read:hover h3,.read:hover .clamp{text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--pen)}
.entry h3{font-size:16px;font-weight:700;line-height:1.45;overflow-wrap:anywhere}
.entry p{font-size:15px;line-height:1.75;color:#433743;overflow-wrap:anywhere}
.entry h3+.clamp,.entry .nt+.clamp{margin-top:2px}
.read>.clamp:first-child{color:var(--ink);font-size:16px;font-weight:700;line-height:1.6}
.entry p.nt{font-size:13px;color:var(--ink-2);line-height:1.6}
.clamp{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:3;overflow:hidden}
.foot{display:flex;align-items:center;gap:8px;margin-top:2px}
.meta{flex:1;min-width:0;display:flex;align-items:center;gap:8px;min-height:44px;font-size:12px;color:var(--ink-2);text-decoration:none;white-space:nowrap;overflow:hidden}
.meta span{overflow:hidden;text-overflow:ellipsis}
.meta .no{flex:none}
.like-f{margin:0;flex:none}
.foot .like-f{margin-right:-8px}
.react,.share{display:inline-flex;align-items:center;justify-content:center;gap:4px;min-height:44px;min-width:56px;padding:0 8px;border:0;border-radius:999px;background:transparent;color:var(--ink);font:inherit;font-size:13px;cursor:pointer;text-decoration:none;white-space:nowrap}
.react b{font-weight:700;font-variant-numeric:tabular-nums}
.react:hover{background:rgba(161,47,42,.08)}
.react:active{background:rgba(161,47,42,.16)}
.react.on{color:var(--pen)}

/* 詳細：ノートの1ページ */
.one{max-width:680px;margin:16px auto 0}
.page{background:var(--paper);color:var(--ink);border-radius:4px 12px 12px 4px;position:relative;padding:16px 16px 12px 44px}
.page::before{content:"";position:absolute;left:32px;top:0;bottom:0;width:1px;background:var(--pen);opacity:.55}
.page-meta{display:flex;flex-wrap:wrap;gap:0 12px;font-size:12px;line-height:1.6;color:var(--ink-2)}
.page-meta .no{color:var(--pen);font-weight:700;text-decoration:none}
.page h1{font-size:20px;font-weight:900;line-height:1.5;margin-top:8px;overflow-wrap:anywhere}
.page .nt{font-size:13px;color:var(--ink-2);margin-top:4px}
.ruled{margin-top:12px;font-size:17px;line-height:var(--ruled);color:var(--ink);overflow-wrap:anywhere;background-image:linear-gradient(transparent calc(var(--ruled) - 1px),var(--rule) calc(var(--ruled) - 1px));background-size:100% var(--ruled)}
.page-acts{display:flex;gap:8px;margin-top:16px}
.react.big,.page-acts .share{min-height:48px;padding:0 16px;font-size:14px;font-weight:700;background:transparent;box-shadow:inset 0 0 0 1px rgba(85,44,80,.24)}
.react.big{flex:1 1 auto}
.react.big.on{background:var(--pen);color:#fff;box-shadow:none}
.page-acts .like-f{flex:1;display:flex}
.page-acts .like-f{max-width:none}
.report{margin:4px 0 0;text-align:right}
.linkbtn{background:none;border:0;color:var(--sub);font:inherit;font-size:13px;text-decoration:underline;text-underline-offset:3px;cursor:pointer;min-height:44px;padding:0}
.pn{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:16px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.pn a{display:block;min-width:0;padding:10px 0;text-decoration:none;font-size:13px;line-height:1.5;color:var(--cream);overflow-wrap:anywhere}
.pn a span{display:block;font-size:12px;color:var(--sub)}
.pn .next{text-align:right}
.related{margin-top:24px}
.related h2{font-size:17px;font-weight:700;margin:0 0 8px}
.back{display:inline-flex;align-items:center;min-height:44px;margin-top:8px;font-size:13px;color:var(--sub)}
.thanks{background:var(--surface);border-left:3px solid var(--pen);border-radius:4px;padding:12px;margin:0 0 12px;font-size:15px}
.thanks p{font-weight:700}
.thanks .share{color:var(--cream);text-decoration:underline;padding:0;min-width:0;justify-content:flex-start}

.empty{color:var(--sub);font-size:14px;text-align:center;padding:16px}
.empty img{border-radius:50%;display:block;margin:0 auto 8px}
.pager{display:flex;justify-content:space-between;margin-top:12px}.pager a{display:inline-flex;align-items:center;min-height:44px;color:var(--pink)}

/* 図鑑 */
.page-h{font-size:24px;margin:16px 0 4px;line-height:1.35}
.lead{color:var(--sub);font-size:13px;margin:0 0 12px}
.zukan{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.zk{display:flex;flex-direction:column;text-decoration:none;background:var(--paper);color:var(--ink);border-radius:4px 12px 12px 4px;padding:12px 12px 12px 14px;min-height:104px}
.zk .no{font-size:12px;color:var(--ink-2);font-variant-numeric:tabular-nums}
.zk b{font-weight:900;font-size:15px;line-height:1.4;margin:2px 0 4px}
.zk span.d{font-size:12px;line-height:1.6;color:var(--ink-2)}
.zk span.k{margin-top:auto;padding-top:4px;font-size:12px;color:var(--ink-2)}

/* 書く欄 */
dialog.sheet{border:0;padding:0;margin:auto 0 0;width:100%;max-width:100%;max-height:92dvh;background:var(--surface);color:var(--cream);border-radius:12px 12px 0 0;overflow:hidden auto}
dialog.sheet::backdrop{background:rgba(0,0,0,.6)}
.sheet-in{padding:16px 16px calc(16px + env(safe-area-inset-bottom))}
.sheet-h{display:flex;align-items:center;gap:8px;margin:0 0 8px}
.sheet-h h2{font-size:17px;line-height:1.4}
.sheet-h img{border-radius:50%}
.sheet-h .close{margin-left:auto;background:none;border:0;color:var(--sub);font:inherit;font-size:14px;min-height:44px;padding:0 4px;cursor:pointer;text-decoration:underline}
.compose label{display:block}
.compose textarea,.compose input[type=text],.form input,.form textarea{display:block;width:100%;font:inherit;font-size:16px;color:var(--cream);background:var(--night);border:1px solid var(--line);border-radius:10px;padding:12px}
.compose textarea{min-height:128px;resize:vertical}
.compose ::placeholder,.form ::placeholder{color:#9a8b97}
.compose .fld{margin-top:8px}
.dont{margin-top:12px;font-size:13px;color:var(--sub)}
.dont p{font-weight:700;color:var(--cream)}
.dont ul{margin:0;padding-left:18px;line-height:1.75}
.compose .chk{display:flex;gap:8px;align-items:center;font-size:13px;color:var(--sub);min-height:44px}
.compose .chk input{width:20px;height:20px;flex:none;accent-color:var(--poison)}
.cta{display:flex;align-items:center;justify-content:center;width:100%;min-height:48px;text-decoration:none;background:var(--poison);color:#fff;font:inherit;font-weight:700;font-size:15px;border-radius:999px;border:0;cursor:pointer}
.cta:hover{background:var(--poison-d)}
.err{color:#fff;background:var(--danger);border-radius:4px;padding:8px 12px;font-size:14px;margin:0 0 8px}
.write-page{overflow:hidden;max-width:560px;margin:16px auto 0;background:var(--surface);border-radius:12px}
.hint{margin-top:8px}.hint a{color:var(--pink)}

.doc{max-width:640px;padding-bottom:24px}.doc h2{font-size:17px;margin:24px 0 4px}.doc li{margin:4px 0}.doc a{color:var(--pink)}
.doc dt{font-size:12px;color:var(--sub)}.doc dd{margin:0 0 8px}.small{font-size:12px;color:var(--sub)}
.form label{display:block;font-size:13px;color:var(--sub);margin:8px 0}
.form input,.form textarea{margin-top:4px}
.form .cta{margin-top:12px}
.auth .chk{display:flex;gap:8px;align-items:center}
.auth .chk input{width:20px;height:20px;flex:none;margin:0}
.panel{background:var(--surface);border-radius:10px;padding:12px;margin:0 0 12px;overflow-wrap:anywhere}
.panel h3{font-size:15px;margin:0 0 4px}.panel p{margin:0 0 4px}
.adm{display:flex;gap:16px;align-items:center;margin-top:8px}.adm .cta{width:auto;padding:0 24px;min-height:44px}
.notebook .del{padding:0 14px 4px 44px;border-bottom:1px solid var(--rule)}
.notebook .del .linkbtn{color:var(--ink-2)}

footer{flex:none;width:100%;max-width:1040px;margin:0 auto;padding:16px 16px calc(var(--nav) + 20px);font-size:12px;color:var(--sub);line-height:1.8}
footer a{color:var(--sub)}

@media (min-width:640px){
  .hero h1{font-size:28px}.hero .reaper{width:112px;height:112px}
  .zukan{grid-template-columns:repeat(3,minmax(0,1fr))}
  .notebook::before,.page::before{left:44px}
  .entry{grid-template-columns:44px minmax(0,1fr)}
  .margin{padding-top:14px}
  .rank{font-size:21px}.rank.two{font-size:15px}
  .main{padding:14px 16px 4px 16px}
  .page{padding:24px 24px 16px 60px}
  .page h1{font-size:24px}
  .page-acts .like-f{flex:0 0 auto}
  .react.big{min-width:200px}
  .notebook .del{padding-left:60px}
}
@media (min-width:960px){
  .tabs{display:none}
  :root{--nav:0px}
  .bar{height:56px}
  .top-nav{display:flex}
  .logo{font-size:20px}
  .hero{padding:24px 0 16px}.hero h1{font-size:32px}.hero p{font-size:15px}.hero .reaper{width:144px;height:144px}
  .dn-grid{display:grid;grid-template-columns:minmax(0,680px) 300px;justify-content:space-between;align-items:start}
  .side{position:sticky;top:72px}
  .side .zukan{grid-template-columns:repeat(2,minmax(0,1fr))}
  .side h2{font-size:17px;margin:24px 0 8px}
  .side .small{margin-top:8px}
  .chips{margin:8px 0 12px;padding:0;flex-wrap:wrap;overflow:visible}
  dialog.sheet{margin:auto;max-width:560px;border-radius:12px}
  .zukan.wide{grid-template-columns:repeat(4,minmax(0,1fr))}
  .one{margin-top:24px}
  footer{padding-bottom:24px}
}
@media (max-width:959px){.side{display:none}}
@media (prefers-reduced-motion:no-preference){dialog.sheet[open]{animation:up .18s ease-out}@keyframes up{from{transform:translateY(16px);opacity:.7}}}