:root{
  --bg:#0f0f0f;--ink:#f5f5f5;--muted:#b7b7b7;--line:#2a2a2a;--card:#171717;--primary:#ef4444;--accent:#f59e0b;
  --shadow:0 12px 24px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
body{margin:0;font-family:"Segoe UI","Noto Sans JP",Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.7}
a{color:inherit;text-decoration:none}img{width:100%;display:block;border-radius:12px;object-fit:cover}

.floating-nav{
  position:sticky;top:10px;z-index:50;max-width:980px;margin:10px auto 0;
  display:flex;justify-content:center;align-items:center;gap:10px;padding:8px 12px;
  background:rgba(23,23,23,.86);border:1px solid var(--line);border-radius:999px;backdrop-filter:blur(8px)
}
.menu-btn{display:none;border:1px solid #3b3b3b;background:#212121;color:#e5e5e5;border-radius:8px;padding:7px 9px}
#mainNav{display:flex;gap:8px}
#mainNav a{padding:6px 10px;border-radius:999px;color:#cfcfcf;font-size:.86rem}
#mainNav a:hover,#mainNav a.active{background:#2d2d2d;color:#fff}

.poster{max-width:1100px;margin:0 auto;padding:18px 16px 72px;display:grid;gap:12px}
.hero,.panel,.card,.matrix,.archive,.check,.rules,.stats article{background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}
.hero{padding:16px}
.serial{font-size:.78rem;letter-spacing:1px;color:#fca5a5;text-transform:uppercase}
h1,h2,h3{margin:0 0 10px;line-height:1.3}
h1{font-size:clamp(2rem,4vw,3.4rem);letter-spacing:.5px}
.lead{font-size:1.02rem;color:#d2d2d2}
.hero img{height:320px;margin-top:10px}

.ticker{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.ticker span{border:1px solid #3a3a3a;background:#1f1f1f;border-radius:999px;padding:7px 10px;text-align:center;font-size:.84rem;color:#d4d4d4}

.three{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.panel{padding:14px}

.matrix{padding:14px}
.matrix .grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.matrix article{border:1px solid #343434;border-radius:10px;padding:10px;background:#1c1c1c}
.matrix p{margin:0;color:#bdbdbd}

.field .cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.card{padding:10px}
.card img{height:170px;margin-bottom:8px}
.card p{margin:0;color:#bdbdbd}

.archive,.check,.rules{padding:14px}
details{border:1px solid #343434;border-radius:10px;padding:8px 10px;background:#1d1d1d}
details+details{margin-top:8px}
summary{cursor:pointer;font-weight:600}
.bar-wrap{height:10px;background:#2d2d2d;border-radius:999px;overflow:hidden}
#bar{height:100%;width:0;background:linear-gradient(90deg,#ef4444,#f59e0b);transition:.3s}
#barText{color:#bdbdbd}
.check label{display:block;border:1px solid #343434;border-radius:10px;padding:8px 10px;background:#1d1d1d;margin-top:8px}
.rules ul{margin:0 0 10px;padding-left:20px}

.footer{text-align:center;color:#a7a7a7;padding:20px;border-top:1px solid #262626}
.top-btn{position:fixed;right:16px;bottom:16px;width:40px;height:40px;border:0;border-radius:999px;background:#ef4444;color:#fff;display:none;cursor:pointer}
.top-btn.show{display:block}
.reveal{opacity:0;transform:translateY(14px);transition:.45s}.reveal.show{opacity:1;transform:translateY(0)}

@media (max-width:980px){
  .ticker,.three,.matrix .grid,.field .cards{grid-template-columns:1fr}
  .menu-btn{display:block}
  #mainNav{display:none;position:absolute;right:12px;top:48px;background:#1d1d1d;border:1px solid #343434;border-radius:10px;padding:10px;flex-direction:column}
  #mainNav.open{display:flex}
}