:root{
  --bg:#0b0b0d;
  --bg-elev:#141417;
  --bg-card:#17171b;
  --line:#2a2a30;
  --line-soft:#232328;
  --fg:#e8e8ec;
  --fg-dim:#a0a0ac;
  --fg-faint:#71717f;
  --red:#e01f3d;
  --red-bright:#ff3355;
  --red-dim:#8f1428;
  --red-wash:rgba(224,31,61,.10);
  --amber:#e8a33d;
  --amber-wash:rgba(232,163,61,.10);
  --radius:10px;
  --sidebar-w:280px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family:"Noto Sans JP",-apple-system,BlinkMacSystemFont,"Hiragino Sans","Yu Gothic",sans-serif;
  font-size:15.5px;
  line-height:1.95;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:var(--red-bright);text-decoration:none}
a:hover{text-decoration:underline}

/* ---------- Layout ---------- */
.wrap{display:flex;min-height:100vh;align-items:flex-start}
.main{flex:1;min-width:0;max-width:900px;padding:0 40px 120px}

/* ---------- Sidebar ---------- */
.sidebar{
  width:var(--sidebar-w);flex:0 0 var(--sidebar-w);
  position:sticky;top:0;height:100vh;overflow-y:auto;
  background:var(--bg-elev);border-right:1px solid var(--line);
  padding:28px 0 60px;
}
.brand{padding:0 24px 22px;border-bottom:1px solid var(--line);margin-bottom:18px}
.brand .logo{
  font-size:1.45rem;font-weight:900;letter-spacing:.04em;line-height:1.3;
  display:block;color:var(--fg)
}
.brand .logo b{color:var(--red)}
.brand .sub{
  display:block;margin-top:6px;font-size:.72rem;letter-spacing:.22em;
  color:var(--fg-faint);font-weight:500
}
/* ---------- Document list (vertical, collapsible) ---------- */
.doc-group{margin-bottom:4px}
.doc-group + .doc-group{
  border-top:1px solid var(--line-soft);padding-top:4px
}
.nav .doc-item{
  display:flex;align-items:center;gap:10px;width:100%;
  padding:12px 14px;border-radius:7px;
  font-family:inherit;font-size:.95rem;font-weight:700;line-height:1.5;
  color:var(--fg-dim);text-align:left;
  background:none;border:none;border-left:3px solid transparent;
  cursor:pointer;transition:background .13s,color .13s,border-color .13s
}
.nav .doc-item .chev{
  flex:none;font-size:.72rem;color:var(--fg-faint);
  transition:transform .18s ease,color .13s;display:inline-block
}
.nav .doc-item:hover{background:#1e1e23;color:var(--fg)}
.nav .doc-item:hover .chev{color:var(--red)}
.nav .doc-item:focus-visible{outline:2px solid var(--red);outline-offset:-2px}
.doc-group.open > .doc-item{color:#fff}
.doc-group.open > .doc-item .chev{transform:rotate(90deg);color:var(--red)}
.doc-group.current > .doc-item{
  background:var(--red-wash);border-left-color:var(--red);color:#fff
}
.doc-group.current > .doc-item .chev{color:var(--red)}

.doc-sections{
  overflow:hidden;margin:0;
  max-height:0;opacity:0;
  transition:max-height .26s ease,opacity .18s ease
}
.doc-group.open > .doc-sections{max-height:900px;opacity:1;margin:2px 0 6px}
.nav{padding:0 14px}
.nav a{
  display:block;padding:8px 12px;border-radius:7px;
  color:var(--fg-dim);font-size:.87rem;line-height:1.5;
  border-left:2px solid transparent;text-decoration:none;
  transition:background .13s,color .13s,border-color .13s;
}
.nav a:hover{background:#1e1e23;color:var(--fg);text-decoration:none}
.nav a.active{color:var(--fg);background:var(--red-wash);border-left-color:var(--red)}
.nav a .n{color:var(--red);font-weight:700;margin-right:7px;font-size:.82rem}
.nav a.sub{padding-left:34px;font-size:.82rem;color:var(--fg-faint)}
.nav a.sub:hover,.nav a.sub.active{color:var(--fg-dim)}
.nav-sep{height:1px;background:var(--line-soft);margin:14px 20px}
.side-note{padding:16px 26px 0;font-size:.72rem;color:var(--fg-faint);line-height:1.8}

/* ---------- Mobile nav ---------- */
.mobile-bar{display:none}
.scrim{display:none}

/* ---------- Hero ---------- */
.hero{padding:64px 0 44px;border-bottom:1px solid var(--line)}
.hero .kicker{
  font-size:.74rem;letter-spacing:.24em;color:var(--red);
  font-weight:700;margin-bottom:16px
}
.hero h1{
  font-size:2.7rem;font-weight:900;margin:0 0 20px;line-height:1.25;letter-spacing:.01em
}
.hero p{margin:0;color:var(--fg-dim);max-width:62ch;font-size:1rem}
.hero .meta{
  margin-top:26px;display:flex;gap:10px;flex-wrap:wrap;
  font-size:.78rem;color:var(--fg-faint)
}
.hero .meta span{
  padding:5px 12px;background:var(--bg-card);
  border:1px solid var(--line);border-radius:99px
}

/* ---------- Sections ---------- */
section{padding-top:56px;scroll-margin-top:20px}
h2{
  font-size:1.6rem;font-weight:900;margin:0 0 8px;line-height:1.4;
  display:flex;align-items:baseline;gap:14px;letter-spacing:.01em
}
h2 .num{
  color:var(--red);font-size:1.05rem;font-weight:900;
  font-variant-numeric:tabular-nums;flex:none
}
h2::after{
  content:"";flex:1;height:1px;background:var(--line);
  position:relative;top:-6px
}
h3{
  font-size:1.08rem;font-weight:700;margin:38px 0 14px;
  color:var(--fg);padding-left:12px;border-left:3px solid var(--red)
}
h4{
  font-size:.95rem;font-weight:700;margin:26px 0 10px;color:var(--fg-dim)
}
.lead{color:var(--fg-dim);margin:14px 0 26px;max-width:66ch}

/* ---------- Rule list ---------- */
.rules{list-style:none;padding:0;margin:0 0 8px}
.rules > li{
  position:relative;padding:14px 0 14px 26px;
  border-bottom:1px solid var(--line-soft)
}
.rules > li:last-child{border-bottom:none}
.rules > li::before{
  content:"";position:absolute;left:4px;top:26px;
  width:6px;height:6px;border-radius:50%;background:var(--red-dim)
}
.rules .t{display:block}
.notes{
  list-style:none;padding:0;
  margin:9px 0 0;
  border-left:2px solid var(--line);
  padding-left:14px
}
.notes li{
  font-size:.855rem;color:var(--fg-faint);line-height:1.85;
  padding:2px 0
}
.notes li::before{content:"＊";color:var(--red-dim);margin-right:4px}
.notes li.arrow::before{content:"➤";color:var(--fg-faint);margin-right:5px;font-size:.8em}
.notes li.ex::before{content:"例）";color:var(--fg-faint);margin-right:2px;font-size:.9em}

/* ---------- Ban cards ---------- */
.ban-head{
  display:flex;align-items:center;gap:12px;
  margin:34px 0 16px;padding:13px 18px;border-radius:var(--radius);
  font-weight:700;font-size:1rem
}
.ban-head.perm{background:var(--red-wash);border:1px solid var(--red-dim);color:#ff6b83}
.ban-head.temp{background:var(--amber-wash);border:1px solid rgba(232,163,61,.38);color:var(--amber)}
.ban-head .icon{font-size:1.05rem;line-height:1}
.ban-head .note{
  margin-left:auto;font-size:.75rem;font-weight:500;color:var(--fg-faint);
  text-align:right;line-height:1.6
}
.card{
  background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--radius);padding:17px 20px;margin-bottom:11px
}
.card > .name{
  font-weight:700;color:var(--fg);display:block;margin-bottom:2px;font-size:.98rem
}
.card .notes{margin-top:9px;border-left-color:var(--line)}

/* ---------- Callouts ---------- */
.callout{
  background:var(--bg-card);border:1px solid var(--line);
  border-left:3px solid var(--red);border-radius:var(--radius);
  padding:18px 22px;margin:24px 0
}
.callout .ttl{
  font-weight:700;color:var(--red-bright);font-size:.92rem;
  margin-bottom:8px;letter-spacing:.03em
}
.callout p{margin:0;color:var(--fg-dim);font-size:.93rem}
.callout.plain{border-left-color:var(--line)}
.callout.plain .ttl{color:var(--fg)}

/* ---------- Requirements ---------- */
.reqs{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:10px}
.reqs li{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--radius);padding:15px 18px
}
.reqs li .chk{
  color:var(--red);font-weight:900;flex:none;font-size:1rem;line-height:1.9
}

/* ---------- Penalty table ---------- */
.tablewrap{overflow-x:auto;margin:20px 0 0;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;min-width:460px;font-size:.92rem}
th,td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line)}
th{
  background:var(--bg-elev);color:var(--fg-dim);font-weight:700;
  font-size:.8rem;letter-spacing:.06em;white-space:nowrap
}
td:first-child{font-weight:700;white-space:nowrap;color:var(--fg)}
tr:last-child td{border-bottom:none}
.sev{
  display:inline-block;width:9px;height:9px;border-radius:50%;
  margin-right:9px;vertical-align:middle
}
.sev.s1{background:#5a5a66}
.sev.s2{background:var(--amber)}
.sev.s3{background:#d4562e}
.sev.s4{background:var(--red)}

/* ---------- Figures ---------- */
.figs{display:flex;gap:14px;flex-wrap:wrap;margin:20px 0 0}
figure{margin:0;background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);padding:12px;max-width:340px}
figure img{display:block;width:100%;height:auto;border-radius:6px}
figcaption{font-size:.76rem;color:var(--fg-faint);margin-top:9px;text-align:center}

/* ---------- Plan cards ---------- */
.plans{display:grid;gap:14px;margin:24px 0 0}
.plan{
  background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--radius);padding:20px 22px;
  display:grid;grid-template-columns:1fr auto;gap:8px 24px;align-items:start
}
.plan.top{border-color:var(--red-dim);background:linear-gradient(180deg,var(--red-wash),var(--bg-card) 70%)}
.plan .pname{font-weight:900;font-size:1.12rem;color:var(--fg);line-height:1.5}
.plan .price{
  text-align:right;white-space:nowrap;
  font-weight:900;font-size:1.22rem;color:var(--red-bright);
  font-variant-numeric:tabular-nums;line-height:1.5
}
.plan .price small{
  display:block;font-size:.76rem;color:var(--fg-faint);font-weight:500;margin-top:1px
}
.plan .perks{grid-column:1/-1;list-style:none;padding:0;margin:8px 0 0;display:grid;gap:5px}
.plan .perks li{
  font-size:.9rem;color:var(--fg-dim);padding-left:20px;position:relative;line-height:1.75
}
.plan .perks li::before{
  content:"▸";position:absolute;left:2px;color:var(--red-dim);font-size:.85em
}
.plan .perks li.cont{color:var(--amber)}
.plan .perks li.cont::before{content:"◈";color:var(--amber)}
.plan .contlabel{
  grid-column:1/-1;margin-top:10px;font-size:.74rem;letter-spacing:.1em;
  color:var(--amber);font-weight:700
}
.cta{
  display:inline-block;margin-top:6px;padding:12px 26px;
  background:var(--red);color:#fff;font-weight:700;border-radius:8px;
  text-decoration:none;font-size:.95rem;letter-spacing:.03em;
  transition:background .13s
}
.cta:hover{background:var(--red-bright);text-decoration:none;color:#fff}
.steps{list-style:none;counter-reset:st;padding:0;margin:20px 0 0;display:grid;gap:11px}
.steps li{
  counter-increment:st;position:relative;padding:16px 20px 16px 60px;
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius)
}
.steps li::before{
  content:counter(st);position:absolute;left:18px;top:15px;
  width:26px;height:26px;border-radius:50%;background:var(--red);color:#fff;
  font-weight:900;font-size:.82rem;display:flex;align-items:center;justify-content:center
}
.steps li .notes{margin-top:8px}

/* ---------- Footer ---------- */
footer{
  margin-top:80px;padding-top:28px;border-top:1px solid var(--line);
  color:var(--fg-faint);font-size:.82rem;line-height:1.9
}
footer .demo{
  background:var(--red-wash);border:1px solid var(--red-dim);
  border-radius:var(--radius);padding:14px 18px;margin-bottom:20px;
  color:#ff8296;font-size:.85rem
}

/* ---------- Responsive ---------- */
@media (max-width:1000px){
  .sidebar{
    position:fixed;left:0;top:0;z-index:60;
    transform:translateX(-100%);transition:transform .22s ease;
    box-shadow:0 0 40px rgba(0,0,0,.6)
  }
  body.nav-open .sidebar{transform:translateX(0)}
  .scrim{
    display:block;position:fixed;inset:0;background:rgba(0,0,0,.6);
    z-index:50;opacity:0;pointer-events:none;transition:opacity .22s
  }
  body.nav-open .scrim{opacity:1;pointer-events:auto}
  .mobile-bar{
    display:flex;align-items:center;gap:14px;
    position:sticky;top:0;z-index:40;
    background:rgba(11,11,13,.92);backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);padding:12px 18px
  }
  .mobile-bar .burger{
    background:var(--bg-card);border:1px solid var(--line);color:var(--fg);
    width:38px;height:38px;border-radius:8px;font-size:1.05rem;cursor:pointer;
    display:flex;align-items:center;justify-content:center;flex:none
  }
  .mobile-bar .ttl{font-weight:700;font-size:.92rem}
  .mobile-bar .ttl b{color:var(--red)}
  .main{padding:0 20px 90px;max-width:none}
  .hero{padding:36px 0 32px}
  .hero h1{font-size:2rem}
  body{font-size:15px}
}
@media (max-width:560px){
  .plan{grid-template-columns:1fr}
  .plan .price{text-align:left}
  h2{font-size:1.3rem;flex-wrap:wrap}
  h2::after{display:none}
  .ban-head{flex-wrap:wrap}
  .ban-head .note{margin-left:0;text-align:left;width:100%}
  .main{padding:0 16px 80px}
}