@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700;800;900&family=Space+Mono:wght@400;700&display=swap');

:root{
  /* twilight arcade — warm deep plum base, genre-coded accents */
  --bg:#15111f; --bg2:#1b1528;
  --panel:#221b32; --panel2:#2b2342;
  --line:#3a3157; --text:#f3effa; --muted:#a89dc4;
  /* genre accents (also reused by the game internals) */
  --accent:#ff5470;   /* 反射・瞬発  */
  --warn:#ffb13d;     /* パズル・中毒 */
  --good:#2dd4a7;     /* 記憶・脳トレ */
  --accent2:#38bdf8;  /* アクション  */
  --purple:#b07dff;   /* 共有・ネタ  */
  --cat:var(--accent);
  --disp:'Noto Sans JP', sans-serif;
  --body:'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono:'Space Mono', ui-monospace, monospace;
}
*{box-sizing:border-box}
html,body{margin:0}
body{
  background:
    radial-gradient(120% 80% at 50% -10%, #271d3a 0%, transparent 60%),
    radial-gradient(closest-side, rgba(255,255,255,.035) 1px, transparent 1.5px) 0 0/22px 22px,
    var(--bg);
  color:var(--text); font-family:var(--body); line-height:1.7;
  -webkit-text-size-adjust:100%; min-height:100vh;
}
a{color:var(--accent2)}
/* キーボード操作時のフォーカス可視化（マウス時は出さない） */
:focus-visible{outline:3px solid var(--accent2); outline-offset:3px; border-radius:8px}
canvas:focus-visible{outline:3px solid var(--accent2); outline-offset:4px}

/* ---- header (game pages) ---- */
header{
  padding:30px 20px 20px; text-align:center;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg, rgba(255,255,255,.03), transparent);
}
header h1{margin:0 0 8px; font-family:var(--disp); font-weight:700; font-size:21px; letter-spacing:.01em; line-height:1.3}
header p{margin:0; color:var(--muted); font-size:13px}
.wrap{max-width:760px; margin:0 auto; padding:18px}
.back{
  display:inline-flex; align-items:center; gap:7px; text-decoration:none;
  color:var(--muted); font-family:var(--mono); font-size:12px; letter-spacing:.04em;
  margin:14px 0 6px; padding:6px 12px; border:1px solid var(--line); border-radius:20px;
  transition:.15s;
}
.back:hover{color:var(--text); border-color:var(--accent2); transform:translateX(-2px)}

/* ---- shared game components ---- */
.stage{ background:var(--panel); border:1px solid var(--line); border-radius:18px; padding:18px; margin-top:10px;
  box-shadow:0 24px 50px -28px rgba(0,0,0,.8); }
.lead{color:var(--muted); font-size:13px; margin:0 0 14px}
canvas{display:block; width:100%; border-radius:12px; touch-action:none; background:#0d0a16}
.row{display:flex; gap:10px; align-items:center; flex-wrap:wrap; margin-top:16px}
button{
  font:inherit; font-family:var(--body); font-weight:700; cursor:pointer; color:#1a1226; border:none;
  background:var(--accent); padding:12px 20px; border-radius:13px; transition:.12s;
  box-shadow:0 5px 0 0 rgba(0,0,0,.35);
}
button:hover{filter:brightness(1.06)}
button:active{transform:translateY(3px); box-shadow:0 2px 0 0 rgba(0,0,0,.35)}
button:disabled{opacity:.45; cursor:default; box-shadow:none; transform:none}
button.ghost{background:transparent; border:1px solid var(--line); color:var(--text); box-shadow:none}
button.ghost:active{transform:scale(.97)}
.stat{font-size:13px; color:var(--muted); font-family:var(--mono)}
.stat b{color:var(--text); font-variant-numeric:tabular-nums; font-weight:700}
.pill{display:inline-flex; gap:6px; align-items:center; padding:5px 12px; border-radius:20px;
  background:var(--panel2); font-family:var(--mono); font-size:12px; border:1px solid var(--line)}
.pill b{color:var(--text); font-variant-numeric:tabular-nums}
.big{font-family:var(--mono); font-size:46px; font-weight:700; font-variant-numeric:tabular-nums; text-align:center; margin:6px 0}
.center{text-align:center}
.msg{min-height:22px; margin-top:12px; font-weight:700}

/* =========================================================
   MENU (index) — prototype arcade catalog
   ========================================================= */
.hero{max-width:880px; margin:0 auto; padding:54px 22px 26px}
.kicker{
  display:inline-flex; align-items:center; gap:9px; font-family:var(--mono); font-size:12px;
  letter-spacing:.22em; color:var(--muted); text-transform:uppercase;
  border:1px solid var(--line); border-radius:30px; padding:6px 14px;
}
.kicker .dot{width:8px; height:8px; border-radius:50%; background:var(--accent); box-shadow:0 0 10px var(--accent)}
.hero h1{
  font-family:var(--disp); font-weight:900; margin:20px 0 0;
  font-size:clamp(38px, 8.4vw, 72px); line-height:1.04; letter-spacing:-.01em;
}
.hero h1 .glow{
  background:linear-gradient(100deg, var(--accent), var(--warn) 45%, var(--accent2));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero .sub{max-width:42ch; color:var(--muted); font-size:15px; margin:18px 0 0}
.specs{display:flex; flex-wrap:wrap; gap:10px; margin-top:24px}
.spec{font-family:var(--mono); font-size:12px; color:var(--muted); border:1px solid var(--line);
  border-radius:10px; padding:8px 12px; background:rgba(255,255,255,.02)}
.spec b{color:var(--text); font-weight:700}

.shelf{max-width:980px; margin:0 auto; padding:8px 18px 70px}
.genre-block{margin-top:40px}
.genre{display:flex; align-items:baseline; gap:12px; padding-bottom:14px; border-bottom:1px solid var(--line)}
.genre .tab{align-self:center; width:11px; height:22px; border-radius:3px; background:var(--cat);
  box-shadow:0 0 14px -2px var(--cat)}
.genre h2{font-family:var(--disp); font-weight:700; font-size:19px; margin:0}
.genre .gsub{color:var(--muted); font-size:12px}
.genre .gno{margin-left:auto; font-family:var(--mono); font-size:13px; color:var(--cat)}

.grid{display:grid; grid-template-columns:repeat(auto-fill, minmax(176px,1fr)); gap:14px; margin-top:18px}

.cart{
  position:relative; background:linear-gradient(180deg, var(--panel), var(--bg2));
  border:1px solid var(--line); border-radius:18px; overflow:hidden;
  opacity:0; transform:translateY(12px); animation:rise .5s ease forwards;
  animation-delay:calc(var(--i,0) * 45ms);
}
.cart::before{content:""; position:absolute; top:0; left:18px; right:18px; height:3px;
  background:var(--cat); border-radius:0 0 4px 4px; box-shadow:0 0 12px -1px var(--cat)}
.cart-link{display:block; padding:16px 15px 15px; text-decoration:none; color:var(--text)}
.cart-head{display:flex; align-items:center; justify-content:space-between; margin-bottom:11px}
.cart-no{font-family:var(--mono); font-size:13px; font-weight:700; color:var(--cat); letter-spacing:.04em}
.lvl{display:inline-flex; gap:4px}
.lvl i{width:8px; height:8px; transform:rotate(45deg); border-radius:2px; background:var(--line)}
.lvl i.on{background:var(--cat)}
.screen{
  position:relative; height:90px; border-radius:12px; border:1px solid var(--line);
  background:radial-gradient(120% 130% at 50% 0%, #1a1426, #0c0913);
  display:grid; place-items:center; overflow:hidden; transition:.18s;
}
.screen::after{content:""; position:absolute; inset:0; pointer-events:none;
  background:repeating-linear-gradient(0deg, transparent 0 3px, rgba(255,255,255,.028) 3px 4px)}
.screen .emoji{font-size:42px; line-height:1; transition:transform .18s;
  filter:drop-shadow(0 4px 10px rgba(0,0,0,.5))}
.cart-title{font-size:16px; font-weight:900; margin:13px 0 4px; letter-spacing:.01em}
.cart-desc{color:var(--muted); font-size:12.5px; margin:0; min-height:38px; line-height:1.55}
.cart-foot{display:flex; align-items:center; justify-content:space-between; margin-top:12px}
.chip{font-family:var(--mono); font-size:11px; color:var(--cat); border:1px solid var(--cat);
  border-radius:20px; padding:3px 10px; opacity:.9}
.start{font-family:var(--mono); font-size:12px; color:var(--muted); opacity:0; transform:translateX(-6px); transition:.18s}
.new-badge{
  position:absolute; top:11px; right:12px; z-index:2;
  font-family:var(--mono); font-size:9px; font-weight:700; letter-spacing:.1em;
  color:#15111f; background:var(--cat); padding:3px 8px; border-radius:20px;
  box-shadow:0 3px 10px -2px var(--cat); animation:pop .3s ease;
}
@keyframes pop{from{transform:scale(0)}to{transform:scale(1)}}

/* フローティング操作ヒント（util.js が全ゲームに自動付与） */
.help-btn{position:fixed; right:16px; bottom:16px; z-index:60; width:46px; height:46px; border-radius:50%;
  background:var(--accent2); color:#06121a; border:none; font:700 22px var(--body); cursor:pointer;
  box-shadow:0 8px 20px -6px var(--accent2); display:grid; place-items:center}
.help-btn:active{transform:scale(.94)}
.help-pop{position:fixed; right:16px; bottom:74px; z-index:60; width:min(300px,calc(100vw - 32px));
  background:var(--panel); border:1px solid var(--line); border-radius:14px; padding:14px 16px;
  box-shadow:0 20px 50px -16px #000; display:none}
.help-pop.show{display:block; animation:pop .18s ease}
.help-pop h4{margin:0 0 7px; font-family:var(--disp); font-weight:700; font-size:15px}
.help-pop p{margin:0; color:var(--muted); font-size:13px; line-height:1.75}

.cart:hover{border-color:var(--cat); transform:translateY(-5px);
  box-shadow:0 18px 34px -16px var(--cat)}
.cart:hover .screen{border-color:var(--cat); box-shadow:inset 0 0 28px -6px var(--cat)}
.cart:hover .screen .emoji{transform:scale(1.12) rotate(-3deg)}
.cart:hover .start{opacity:1; transform:translateX(0); color:var(--cat)}
.cart-link:focus-visible{outline:2px solid var(--accent2); outline-offset:3px; border-radius:18px}

.foot{max-width:980px; margin:0 auto; padding:0 18px 60px; color:var(--muted); font-size:12.5px; line-height:1.8}
.foot b{color:var(--text)}
.foot .tip{border-left:2px solid var(--cat); --cat:var(--warn); padding:4px 0 4px 14px; margin-top:14px}

@keyframes rise{to{opacity:1; transform:translateY(0)}}
@media (prefers-reduced-motion: reduce){
  .cart{animation:none; opacity:1; transform:none}
  *{transition:none !important}
}