:root{
  --bg:#101216;--surface:#1d2025;--surface2:#292d33;--line:#3c4149;
  --text:#d3d8de;--dim:#8d939c;--amber:#ff9b21;--ivory:#e9e3d3;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP",sans-serif;
  color-scheme:dark;
}
*{box-sizing:border-box}
body{margin:0;min-height:100dvh;font-family:var(--sans);line-height:1.85;color:var(--text);
  background:radial-gradient(120% 70% at 50% 0%,#34373d 0%,#1a1c20 54%,#0d0e11 100%)}
.wrap{width:min(680px,100%);margin:0 auto;padding:34px 16px 72px}
.plate{display:inline-flex;align-items:center;gap:9px;padding:8px 12px;border-radius:6px;
  background:linear-gradient(170deg,#4b4f58,#292c31);box-shadow:inset 0 1px rgba(255,255,255,.17),0 8px 22px rgba(0,0,0,.35);
  font:800 10px/1 var(--sans);letter-spacing:.24em;color:#dfe3e8}
.led{width:7px;height:7px;border-radius:50%;background:#ff3b30;box-shadow:0 0 8px rgba(255,59,48,.65)}
h1{font-size:clamp(25px,7vw,34px);line-height:1.35;margin:24px 0 9px;color:#f1f3f5}
.lede{margin:0;color:var(--dim);font-size:13.5px}
main{margin-top:32px;display:grid;gap:14px}
section{border:1px solid var(--line);border-radius:9px;padding:20px;background:linear-gradient(155deg,rgba(54,58,65,.9),rgba(28,31,36,.94));
  box-shadow:inset 0 1px rgba(255,255,255,.06),0 8px 24px rgba(0,0,0,.2)}
h2{margin:0 0 10px;font-size:15px;color:var(--ivory)}
h2::before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:9px;background:var(--amber);box-shadow:0 0 8px rgba(255,155,33,.45)}
p{margin:0;font-size:13px;color:#b5bbc3}
p+p{margin-top:10px}
a{color:var(--amber)}
.meta{font:700 11px/1.7 var(--mono);color:var(--dim)}
.back{display:inline-block;margin-top:26px;padding:12px 18px;border-radius:6px;text-decoration:none;
  background:linear-gradient(#e2e5ea,#aeb4bc);color:#26292e;font-size:12px;font-weight:800;
  box-shadow:0 3px 0 #5c616a,0 7px 14px rgba(0,0,0,.3)}
footer{margin-top:44px;padding-top:22px;border-top:1px solid var(--line);text-align:center;font-size:11px;color:#6f757d}
.footer-guide{display:inline-flex;align-items:center;gap:8px;margin-top:12px;padding:9px 16px;border:1px solid var(--line);
  border-radius:6px;background:linear-gradient(#343840,#25282e);color:#d5dae0!important;text-decoration:none;font-weight:700}
.footer-guide:hover{border-color:#76603b;color:var(--amber)!important}
.links{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:5px 8px;margin-top:13px}
.links a{color:#8d939c;text-decoration:none}
.links .sep{color:#484d55;user-select:none}
a:focus-visible{outline:2px solid var(--amber);outline-offset:3px}