*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#0a0a0a;
  --surface:#111;
  --surface2:#1a1a1a;
  --border:#222;
  --text:#e0e0e0;
  --text2:#999;
  --accent:#ff6b2b;
  --accent2:#ff8f5e;
  --gold:#ffc857;
  --green:#3ecf8e;
}
body{
  font-family:'Noto Sans JP','Inter',sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.9;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
}
html{scroll-behavior:smooth}

/* Top Bar */
.top-bar{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(10,10,10,.92);
  backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  padding:12px 24px;
  display:flex;align-items:center;gap:12px;
}
.top-bar .rocket{font-size:24px}
.top-bar h1{font-size:16px;font-weight:700;letter-spacing:.5px}
.top-bar .date{margin-left:auto;font-size:12px;color:var(--text2);font-family:'Inter',monospace}

/* Sidebar Navigation */
nav.toc{
  position:fixed;top:56px;left:0;bottom:0;width:230px;
  background:var(--surface);border-right:1px solid var(--border);
  padding:24px 16px;overflow-y:auto;z-index:90;
}
nav.toc a{
  display:block;padding:9px 14px;margin:1px 0;
  color:var(--text2);text-decoration:none;font-size:13px;font-weight:500;
  border-radius:8px;transition:all .2s;
}
nav.toc a:hover{color:var(--accent);background:rgba(255,107,43,.08)}
nav.toc a.active{color:#fff;background:var(--accent);font-weight:700}
nav.toc .section-label{
  font-size:11px;color:var(--text2);text-transform:uppercase;letter-spacing:1.5px;
  padding:18px 12px 6px;font-weight:700;opacity:.5;
}

/* Main Content - Centered */
.page-wrapper{
  margin-left:230px;margin-top:56px;
  display:flex;justify-content:center;
  min-height:calc(100vh - 56px);
}
main{max-width:820px;width:100%;padding:48px 48px 120px}

/* Section Title */
section{padding-top:64px;margin-top:-40px}
section > h2{
  font-size:28px;font-weight:900;letter-spacing:1px;
  border-bottom:3px solid var(--accent);
  padding-bottom:12px;margin-bottom:28px;
  display:flex;align-items:center;gap:12px;
}
section > h2 .num{
  font-family:'Inter',sans-serif;font-size:18px;font-weight:800;
  background:var(--accent);color:#fff;border-radius:8px;
  min-width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;
}
.lead{color:var(--text2);font-size:15px;margin-bottom:24px}

/* Cards */
.card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:12px;padding:26px 30px;margin-bottom:18px;
  transition:border-color .3s;
}
.card:hover{border-color:var(--accent)}
.card h3{font-size:17px;font-weight:700;margin-bottom:14px;line-height:1.6;display:flex;align-items:center;gap:10px}
.card p{margin-bottom:10px;color:var(--text)}
.card p:last-child{margin-bottom:0}
.highlight{color:var(--accent2);font-weight:700}
.plain-strong{color:#fff;font-weight:700}
.muted{color:var(--text2)}
blockquote{
  border-left:3px solid var(--accent);padding:12px 16px;margin:14px 0;
  background:rgba(255,107,43,.05);border-radius:0 8px 8px 0;font-weight:500;
}

/* Script "say" block = FSが実際に話す文 */
.say{
  background:rgba(255,200,87,.06);
  border:1px solid rgba(255,200,87,.25);
  border-left:3px solid var(--gold);
  border-radius:0 10px 10px 0;
  padding:16px 18px;margin:12px 0;
  color:#f3e9d2;line-height:1.85;white-space:pre-line;
}
.say::before{
  content:'🗣 話す';display:inline-block;font-size:11px;font-weight:700;
  color:var(--gold);letter-spacing:1px;margin-bottom:8px;opacity:.8;
}

/* Callouts */
.callout{border-radius:10px;padding:14px 18px;margin:14px 0;border:1px solid var(--border);font-size:14px}
.callout .l{font-weight:700;display:block;margin-bottom:4px}
.callout.tip{background:rgba(62,207,142,.06);border-color:rgba(62,207,142,.3)}
.callout.tip .l{color:var(--green)}
.callout.warn{background:rgba(255,107,43,.07);border-color:rgba(255,107,43,.35)}
.callout.warn .l{color:var(--accent)}
.callout.info{background:var(--surface2)}
.callout.info .l{color:var(--accent2)}

/* Steps / lists */
.flow-list{list-style:none;padding:0;counter-reset:s}
.flow-list li{
  padding:10px 0 10px 44px;position:relative;border-bottom:1px solid var(--border);
}
.flow-list li:last-child{border-bottom:none}
.flow-list li::before{
  counter-increment:s;content:counter(s);
  position:absolute;left:0;top:10px;
  width:30px;height:30px;border-radius:8px;
  background:rgba(255,107,43,.15);color:var(--accent2);
  font-family:'Inter';font-weight:800;font-size:14px;
  display:flex;align-items:center;justify-content:center;
}
.check-list{list-style:none;padding:0}
.check-list li{padding:6px 0 6px 28px;position:relative}
.check-list li::before{content:'✓';position:absolute;left:2px;color:var(--green);font-weight:800}
.ng-list li::before{content:'✕';color:var(--accent)}

/* Tables */
.tbl{width:100%;border-collapse:collapse;margin:14px 0;font-size:14px}
.tbl th{
  background:rgba(255,107,43,.15);color:var(--accent2);font-weight:700;
  padding:10px 14px;text-align:left;border-bottom:2px solid var(--accent);
}
.tbl td{padding:10px 14px;border-bottom:1px solid var(--border);vertical-align:top}
.tbl tr:hover td{background:rgba(255,107,43,.05)}

/* pills / badges */
.pill{display:inline-block;font-size:12px;font-weight:700;padding:3px 10px;border-radius:20px;background:var(--surface2);color:var(--accent2);margin:2px 4px 2px 0}
.pill.gold{background:rgba(255,200,87,.12);color:var(--gold)}
.pill.green{background:rgba(62,207,142,.12);color:var(--green)}

.two-col{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:14px 0}
.box{background:var(--surface2);border-radius:10px;padding:16px 18px}
.box h4{font-size:14px;color:var(--accent2);margin-bottom:8px;font-weight:700}

/* Scroll Progress */
.scroll-progress{
  position:fixed;top:0;left:0;height:2px;width:0;
  background:linear-gradient(90deg,var(--accent),var(--gold));
  z-index:200;transition:width .1s;
}

/* Mobile Bottom Nav */
.mobile-nav{
  display:none;position:fixed;bottom:0;left:0;right:0;
  background:rgba(10,10,10,.95);backdrop-filter:blur(20px);
  border-top:1px solid var(--border);padding:8px;overflow-x:auto;white-space:nowrap;z-index:100;
}
.mobile-nav a{display:inline-block;padding:8px 14px;color:var(--text2);text-decoration:none;font-size:12px;font-weight:600;border-radius:20px}
.mobile-nav a.active{background:var(--accent);color:#fff}

/* Top TOC grid */
.toc-top{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px 22px;margin-bottom:28px}
.toc-top h3{font-size:12px;color:var(--text2);text-transform:uppercase;letter-spacing:1.5px;margin-bottom:14px;font-weight:700}
.toc-top .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.toc-top a{display:block;padding:10px 12px;background:var(--surface2);border:1px solid var(--border);border-radius:8px;color:var(--text);text-decoration:none;font-size:13px;font-weight:600;transition:all .2s}
.toc-top a:hover{border-color:var(--accent);color:var(--accent2);background:rgba(255,107,43,.06)}

/* Page Navigation (Prev/Next) */
.page-nav{display:flex;justify-content:space-between;align-items:stretch;gap:16px;margin-top:56px;padding-top:32px;border-top:1px solid var(--border)}
.page-nav a{display:flex;flex-direction:column;padding:18px 22px;background:var(--surface);border:1px solid var(--border);border-radius:12px;text-decoration:none;transition:all .3s;min-width:0;flex:1}
.page-nav a:hover{border-color:var(--accent);background:rgba(255,107,43,.05)}
.page-nav a.next{text-align:right;align-items:flex-end}
.page-nav .nav-label{font-size:12px;color:var(--text2);margin-bottom:4px;font-weight:600;text-transform:uppercase;letter-spacing:1px}
.page-nav .nav-title{font-size:15px;font-weight:700;color:var(--accent2)}
.page-nav .spacer{flex:1}
.top-bar a.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:inherit}
.top-bar a.brand img{width:22px;height:22px;border-radius:5px}

/* arrow flow */
.arrow-flow{list-style:none;padding:0}
.arrow-flow li{background:var(--surface2);border-radius:8px;padding:12px 16px;font-weight:600}
.arrow-flow li:not(:last-child){margin-bottom:4px}
.arrow-flow li:not(:last-child)::after{content:'↓';display:block;text-align:center;color:var(--accent);font-weight:800;margin:4px 0 -4px;opacity:.7}
.arrow-flow li small{display:block;color:var(--text2);font-weight:400;font-size:12px;margin-top:3px}

@media(max-width:900px){
  nav.toc{display:none}
  .page-wrapper{margin-left:0}
  main{padding:28px 18px 90px}
  section > h2{font-size:22px}
  .two-col{grid-template-columns:1fr}
  .mobile-nav{display:block}
  .toc-top .grid{grid-template-columns:1fr 1fr}
  .page-nav{flex-direction:column}
}