@import url('https://fonts.googleapis.com/css2?family=M+PLUS+Rounded+1c:wght@400;500;700;800&family=Fraunces:ital,opsz,wght@0,9..144,500;0,9..144,600;1,9..144,500&family=Noto+Sans+JP:wght@400;500;700&family=JetBrains+Mono:wght@400;500&display=swap');
:root{
  --ink-deep:#03060F;--ink:#0A0E1A;--ink-blue:#0F1729;--ink-soft:#1A2236;--ink-lifted:#243044;
  --frost:#EAF0FA;--frost-mute:#9FB0C8;--line:rgba(159,176,200,.16);
  --electric:#4DA8DA;--electric-glow:#8FCFFA;--gold:#E8B23E;--mint:#43C9A0;--coral:#FF7A6B;--red:#BE1622;
  --f-fun:'M PLUS Rounded 1c',sans-serif;--f-body:'Noto Sans JP',sans-serif;--f-en:'Fraunces',serif;--f-mono:'JetBrains Mono',monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--ink);color:var(--frost);font-family:var(--f-body);font-size:17px;line-height:1.95;font-feature-settings:"palt" 1,"kern" 1;-webkit-font-smoothing:antialiased}
::selection{background:var(--gold);color:var(--ink)}
a{color:var(--electric-glow);text-decoration:none;border-bottom:1px solid rgba(143,207,250,.3);transition:.2s}
a:hover{color:#fff;border-bottom-color:var(--electric)}
.wrap{max-width:760px;margin:0 auto;padding:0 22px}
header.site{position:sticky;top:0;z-index:50;background:rgba(10,14,26,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
header.site .wrap{max-width:1080px;display:flex;align-items:center;justify-content:space-between;height:62px}
header.site img{height:26px}
header.site .cta{font-family:var(--f-fun);font-weight:700;font-size:.86rem;background:var(--gold);color:var(--ink);padding:.5rem 1.05rem;border-radius:999px;border:none}
header.site .cta:hover{color:var(--ink);filter:brightness(1.08)}
.crumb{font-size:.78rem;color:var(--frost-mute);padding:1.5rem 0 .2rem;font-family:var(--f-mono)}
.crumb a{border:none;color:var(--frost-mute)}
.crumb a:hover{color:var(--electric-glow)}
article{padding:1rem 0 3rem}
.tag{display:inline-block;font-family:var(--f-mono);font-size:.72rem;letter-spacing:.08em;color:var(--mint);border:1px solid rgba(67,201,160,.4);border-radius:999px;padding:.25rem .7rem;margin-bottom:1.1rem}
h1{font-family:var(--f-fun);font-weight:800;font-size:clamp(1.7rem,4.4vw,2.6rem);line-height:1.3;letter-spacing:.01em;margin-bottom:1rem}
.lead{font-size:1.06rem;color:var(--frost-mute);margin-bottom:1.6rem;line-height:1.9}
.meta{font-family:var(--f-mono);font-size:.74rem;color:var(--frost-mute);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:.7rem 0;margin-bottom:2rem;display:flex;gap:1.2rem;flex-wrap:wrap}
article h2{font-family:var(--f-fun);font-weight:700;font-size:clamp(1.3rem,3vw,1.7rem);margin:2.6rem 0 1rem;padding-left:.7rem;border-left:4px solid var(--gold)}
article h3{font-family:var(--f-fun);font-weight:700;font-size:1.12rem;margin:1.8rem 0 .6rem;color:var(--electric-glow)}
article p{margin-bottom:1.15rem}
article ul,article ol{margin:0 0 1.3rem 1.3rem}
article li{margin-bottom:.55rem}
strong{color:#fff;font-weight:700;background:linear-gradient(transparent 62%,rgba(232,178,62,.22) 0)}
.toc{background:var(--ink-blue);border:1px solid var(--line);border-radius:14px;padding:1.3rem 1.5rem;margin:2rem 0}
.toc b{font-family:var(--f-fun);font-size:.92rem;display:block;margin-bottom:.6rem;color:var(--gold)}
.toc ol{margin:0 0 0 1.2rem;font-size:.92rem}
.toc li{margin-bottom:.35rem}
.box{background:linear-gradient(135deg,rgba(77,168,218,.1),rgba(67,201,160,.06));border:1px solid rgba(77,168,218,.28);border-radius:14px;padding:1.3rem 1.5rem;margin:1.8rem 0}
.box b{color:var(--electric-glow);font-family:var(--f-fun)}
table{width:100%;border-collapse:collapse;margin:1.4rem 0;font-size:.9rem}
th,td{border:1px solid var(--line);padding:.65rem .8rem;text-align:left;vertical-align:top}
th{background:var(--ink-soft);font-family:var(--f-fun);color:var(--frost)}
tr:nth-child(even) td{background:rgba(26,34,54,.4)}
.faq dt{font-family:var(--f-fun);font-weight:700;color:var(--electric-glow);margin:1.4rem 0 .5rem}
.faq dd{margin:0 0 1rem;color:var(--frost-mute)}
.cta-box{background:linear-gradient(135deg,var(--ink-blue),var(--ink-soft));border:1px solid rgba(232,178,62,.3);border-radius:18px;padding:2rem 1.8rem;margin:3rem 0 1rem;text-align:center}
.cta-box h3{font-family:var(--f-fun);font-size:1.35rem;color:#fff;margin-bottom:.7rem}
.cta-box p{color:var(--frost-mute);font-size:.95rem;margin-bottom:1.3rem}
.cta-box a.btn{display:inline-block;font-family:var(--f-fun);font-weight:800;font-size:1rem;background:var(--gold);color:var(--ink);padding:.85rem 2rem;border-radius:999px;border:none}
.cta-box a.btn:hover{color:var(--ink);filter:brightness(1.08)}
.related{border-top:1px solid var(--line);padding-top:1.8rem;margin-top:2.5rem}
.related b{font-family:var(--f-fun);color:var(--gold);display:block;margin-bottom:1rem}
.related a{display:block;padding:.85rem 1.1rem;background:var(--ink-blue);border:1px solid var(--line);border-radius:12px;margin-bottom:.7rem;color:var(--frost);border-bottom:1px solid var(--line)}
.related a:hover{border-color:var(--electric);color:#fff}
.related a span{display:block;font-size:.78rem;color:var(--frost-mute);margin-top:.2rem;font-family:var(--f-mono)}
footer.site{border-top:1px solid var(--line);padding:2.2rem 0;text-align:center;font-size:.8rem;color:var(--frost-mute)}
footer.site a{color:var(--frost-mute);border:none;margin:0 .6rem}
footer.site a:hover{color:var(--electric-glow)}