:root{
  --bg:#f6f3ee;
  --paper:#fffdf9;
  --ink:#1a1b1f;
  --muted:#4a4f5a;
  --soft:#6e7481;
  --line:#e6dfd2;
  --shadow:0 18px 45px rgba(20,23,31,.10);
  --shadow2:0 10px 22px rgba(20,23,31,.08);
  --r:20px;
  --r2:34px;

  --accent:#2f6fff;
  --accent2:#ff4d6d;
  --accent3:#00b894;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  color:var(--ink);
  background:
    radial-gradient(900px 520px at 86% 8%, rgba(47,111,255,.10), transparent 58%),
    radial-gradient(820px 520px at 14% 12%, rgba(255,77,109,.08), transparent 60%),
    linear-gradient(180deg, var(--bg), #ffffff 40%, var(--bg));
  overflow-x:hidden;
}
a{color:inherit}
.container{width:min(1200px, 92vw); margin:0 auto}
.skip{position:absolute;left:-999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip:focus{left:16px;top:16px;width:auto;height:auto;z-index:999;background:var(--paper);padding:10px 12px;border-radius:14px;border:1px solid var(--line);box-shadow:var(--shadow)}
.shell{display:grid;grid-template-columns: 290px 1fr;gap:18px;align-items:start;padding:18px 0 26px}
.rail{
  position:sticky;top:14px;
  border-radius:var(--r2);
  border:1px solid var(--line);
  background:rgba(255,253,249,.92);
  box-shadow:var(--shadow);
  padding:14px;
}
.brand{display:flex;gap:12px;align-items:center;text-decoration:none}
.seal{
  width:44px;height:44px;border-radius:16px;
  background:radial-gradient(18px 18px at 30% 28%, rgba(255,255,255,.85), transparent 55%),
    conic-gradient(from 210deg, var(--accent), var(--accent2), var(--accent3), var(--accent));
  box-shadow:0 14px 24px rgba(20,23,31,.12);
}
.brand strong{display:block;font-size:14px;letter-spacing:.4px}
.brand span{display:block;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial; font-size:12px;color:var(--soft);line-height:1.15}
.rail hr{border:0;border-top:1px solid var(--line);margin:12px 0}
.rail .mini{font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;font-size:12.5px;color:var(--muted);line-height:1.45}
.nav{display:flex;flex-direction:column;gap:8px;margin-top:10px}
.nav a{
  text-decoration:none;display:flex;align-items:center;justify-content:space-between;
  min-height:44px;padding:12px 12px;border-radius:16px;border:1px solid var(--line);
  background:rgba(246,243,238,.70);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;font-weight:800;
}
.nav a span{font-weight:700;color:var(--soft);font-size:12px}
.nav a:hover{transform:translateY(-1px);box-shadow:var(--shadow2)}
.primary{border-color:transparent!important;background:linear-gradient(135deg, rgba(47,111,255,.95), rgba(0,184,148,.80));color:#0a1020}
.primary span{color:rgba(10,16,32,.75)}
.badgelist{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.badge{
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  font-size:12px;color:var(--muted);padding:8px 10px;border-radius:999px;border:1px solid var(--line);background:rgba(255,253,249,.85);
}
.topbar{
  display:none;position:sticky;top:0;z-index:60;
  background:rgba(246,243,238,.92);backdrop-filter: blur(10px);border-bottom:1px solid var(--line);
}
.topbar-in{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0}
.menuBtn{
  min-height:44px;padding:10px 12px;border-radius:16px;border:1px solid var(--line);
  background:rgba(255,253,249,.90);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;font-weight:900;cursor:pointer;
}
.drawer{display:none;border-top:1px solid var(--line)}
.drawer-in{padding:10px 0 14px;display:flex;flex-direction:column;gap:8px}
.content{}
.paper{border-radius:var(--r2);border:1px solid var(--line);background:rgba(255,253,249,.96);box-shadow:var(--shadow);overflow:hidden}
.cover{
  padding:20px 20px 16px;
  background:radial-gradient(720px 420px at 16% 22%, rgba(255,77,109,.10), transparent 62%),
    radial-gradient(760px 420px at 86% 18%, rgba(47,111,255,.10), transparent 62%),
    rgba(255,253,249,.96);
  border-bottom:1px solid var(--line);
}
.kicker{font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;font-size:12px;color:var(--soft);letter-spacing:.12em;text-transform:uppercase}
.h1{margin:10px 0 6px;font-size: clamp(30px, 3.8vw, 56px);line-height:1.02;letter-spacing:-.6px}
.sub{margin:0;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;color:var(--muted);font-size:15px;line-height:1.6;max-width:78ch}
.actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-top:14px}
.btn{
  min-height:44px;padding:12px 14px;border-radius:16px;border:1px solid var(--line);
  background:rgba(246,243,238,.70);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;font-weight:900;text-decoration:none;
  display:inline-flex;align-items:center;justify-content:center;
}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow2)}
.btn.primary{border:0;background:linear-gradient(135deg, rgba(255,77,109,.92), rgba(47,111,255,.92));color:#fff}
.deck{display:grid;grid-template-columns: 1fr 340px;gap:0}
.deck .left{padding:16px 20px;border-right:1px solid var(--line)}
.deck .right{padding:16px 20px;background:rgba(246,243,238,.40)}
.blockTitle{font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;font-size:13px;color:var(--soft);letter-spacing:.08em;text-transform:uppercase;margin:0 0 10px}
.cards{display:grid;grid-template-columns: 1fr 1fr;gap:12px}
.card{border-radius:var(--r);border:1px solid var(--line);background:rgba(255,253,249,.96);box-shadow:var(--shadow2);padding:14px}
.card h3{margin:0 0 8px;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;font-size:14px}
.card p{margin:0;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;color:var(--muted);font-size:13.5px;line-height:1.55}
.toc{display:grid;gap:10px}
.tocItem{border-radius:var(--r);border:1px solid var(--line);background:rgba(255,253,249,.96);box-shadow:var(--shadow2);padding:12px 12px}
.tocItem strong{display:block;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;font-size:13px}
.tocItem span{display:block;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;color:var(--soft);font-size:12.5px;line-height:1.4;margin-top:4px}
.section{padding:14px 20px;border-top:1px solid var(--line)}
.sectionHead{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:10px}
.sectionHead h2{margin:0;font-size: clamp(18px, 2.2vw, 28px);letter-spacing:-.2px}
.sectionHead p{margin:0;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;color:var(--muted);font-size:13px;line-height:1.5;max-width:68ch}
.mag{display:grid;gap:12px;grid-template-columns: 1.2fr .8fr;align-items:start}
.tabs{border-radius:var(--r2);border:1px solid var(--line);background:rgba(246,243,238,.55);padding:12px}
.tabbar{display:flex;gap:8px;flex-wrap:wrap}
.tabbtn{
  min-height:44px;padding:10px 12px;border-radius:999px;border:1px solid var(--line);
  background:rgba(255,253,249,.96);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;font-weight:900;cursor:pointer;
}
.tabbtn[aria-selected="true"]{border-color:transparent;background:linear-gradient(135deg, rgba(47,111,255,.92), rgba(0,184,148,.82));color:#0a1020}
.tabpanel{margin-top:10px;border-radius:var(--r2);border:1px solid var(--line);background:rgba(255,253,249,.96);padding:14px}
.list{margin:0;padding-left:18px;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;color:var(--muted);font-size:13.5px;line-height:1.6}
.inlineNote{margin-top:10px;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;color:var(--soft);font-size:12.5px;line-height:1.45}
.sidebarBox{border-radius:var(--r2);border:1px solid var(--line);background:rgba(255,253,249,.96);box-shadow:var(--shadow2);padding:14px}
.sidebarBox h3{margin:0 0 8px;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;font-size:14px}
.kv{display:grid;gap:10px;margin-top:10px}
.kv .row{display:grid;gap:10px;grid-template-columns: 130px 1fr;padding:10px 12px;border-radius:16px;border:1px solid var(--line);background:rgba(246,243,238,.50)}
.kv .k{font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;font-size:12px;color:var(--soft)}
.kv .v{font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;font-size:13px;color:var(--ink);line-height:1.35}
.quiz{border-radius:var(--r2);border:1px solid var(--line);background:rgba(246,243,238,.55);padding:12px}
.qstep{border-radius:var(--r2);border:1px solid var(--line);background:rgba(255,253,249,.96);padding:14px}
.qhead{display:flex;align-items:center;justify-content:space-between;gap:10px;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial}
.qhead strong{font-size:13px}
.prog{font-size:12px;color:var(--soft)}
.qtext{margin:10px 0 0;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;color:var(--muted);font-size:13.5px;line-height:1.55}
.opt{margin-top:12px;display:grid;gap:8px}
.opt button{
  min-height:44px;border-radius:16px;border:1px solid var(--line);background:rgba(255,253,249,.96);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;font-weight:900;cursor:pointer;text-align:left;padding:12px 12px;
}
.opt button:hover{transform:translateY(-1px);box-shadow:var(--shadow2)}
.opt button .s{display:block;color:var(--soft);font-size:12px;font-weight:800;margin-top:3px}
.form{border-radius:var(--r2);border:1px solid var(--line);background:rgba(255,253,249,.96);box-shadow:var(--shadow2);padding:14px}
.formGrid{display:grid;gap:12px;grid-template-columns: 1fr 1fr}
.field label{display:block;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;font-size:12px;color:var(--soft);margin:0 0 6px}
.input, textarea{
  width:100%;min-height:44px;padding:12px 12px;border-radius:16px;border:1px solid var(--line);
  background:rgba(246,243,238,.55);color:var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;outline:none;
}
textarea{min-height:110px;resize:vertical}
.input:focus, textarea:focus{border-color: rgba(47,111,255,.55)}
.check{display:flex;gap:10px;align-items:flex-start;margin-top:12px}
.check input{margin-top:3px;width:18px;height:18px}
.check label{font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;color:var(--muted);font-size:12.5px;line-height:1.45}
.check a{color:var(--accent)}
.msg{
  margin-top:10px;display:none;padding:10px 12px;border-radius:16px;border:1px solid var(--line);
  background:rgba(255,77,109,.10);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;color:var(--ink);font-size:12.5px;
}
.msg.ok{background:rgba(0,184,148,.12)}
.formActions{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-top:12px}
.helper{font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;color:var(--soft);font-size:12.5px;line-height:1.4}
.faq{display:grid;gap:10px;grid-template-columns:1fr 1fr}
details{border-radius:var(--r);border:1px solid var(--line);background:rgba(255,253,249,.96);box-shadow:var(--shadow2);padding:12px 12px}
summary{cursor:pointer;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;font-weight:900;font-size:13px;list-style:none}
summary::-webkit-details-marker{display:none}
details p{margin:10px 0 0;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;color:var(--muted);font-size:13px;line-height:1.5}
.footer{margin-top:18px;border-top:1px solid var(--line);background:rgba(246,243,238,.92)}
.footer-in{padding:18px 0;display:grid;grid-template-columns: 1.2fr .8fr;gap:12px}
.footer small{font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;color:var(--soft)}
.flinks{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end;align-items:center}
.flinks a{
  min-height:44px;padding:10px 12px;border-radius:16px;border:1px solid var(--line);background:rgba(255,253,249,.96);
  text-decoration:none;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;color:var(--muted);font-size:12px;display:inline-flex;align-items:center;
}
.flinks a:hover{transform:translateY(-1px);box-shadow:var(--shadow2)}
.page{padding:26px 0}
.prose{border-radius:var(--r2);border:1px solid var(--line);background:rgba(255,253,249,.96);box-shadow:var(--shadow);padding:18px}
.prose h1{margin:0 0 12px;font-size:28px}
.prose h2{margin:18px 0 8px;font-size:16px}
.prose p,.prose li{font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;color:var(--muted);line-height:1.6;font-size:14px}
.prose ul{margin:10px 0 0;padding-left:18px}
.code{border-radius:18px;border:1px dashed var(--line);background:rgba(246,243,238,.65);padding:12px;font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;color:var(--muted);font-size:12.5px;overflow-wrap:anywhere}
@media (max-width: 980px){
  .shell{grid-template-columns: 1fr}
  .rail{display:none}
  .topbar{display:block}
  .deck{grid-template-columns: 1fr}
  .deck .left{border-right:0;border-bottom:1px solid var(--line)}
  .cards{grid-template-columns: 1fr}
  .mag{grid-template-columns: 1fr}
  .formGrid{grid-template-columns: 1fr}
  .faq{grid-template-columns: 1fr}
  .footer-in{grid-template-columns: 1fr}
  .flinks{justify-content:flex-start}
}