/* ==========================================================
   50SLOTBETKECIL — AURORA OBSIDIAN
   Immersive digital editorial · pure CSS, no external assets
   ========================================================== */

:root{
  --obsidian:#0B0D17;
  --surface:#151928;
  --surface-2:#1B2033;
  --mint:#43E6CE;
  --violet:#9B7BFA;
  --peach:#FFB88C;
  --frost:#F7F7FF;
  --muted:#AAB4C7;
  --border:#303548;

  --f-sans:"Segoe UI Variable Display","Segoe UI",system-ui,-apple-system,"SF Pro Display","Helvetica Neue",Roboto,Arial,sans-serif;
  --f-serif:"Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua",Georgia,serif;
  --f-mono:ui-monospace,"SF Mono","Cascadia Code",Menlo,Consolas,monospace;

  --wrap:1240px;
  --gutter:clamp(16px,4vw,40px);
  --radius:18px;
  --header-h:72px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --aurora:linear-gradient(100deg,var(--mint) 0%,var(--violet) 55%,var(--peach) 100%);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 24px)}
body{
  margin:0;background:var(--obsidian);color:var(--frost);
  font-family:var(--f-sans);font-size:clamp(16px,1.05vw,17.5px);line-height:1.72;
  text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{line-height:1.08;margin:0 0 .5em;font-weight:700;letter-spacing:-.025em;text-wrap:balance}
p{margin:0 0 1.15em}
a{color:var(--mint);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--frost)}
strong{color:var(--frost);font-weight:650}
ul,ol{padding-left:1.25em}
::selection{background:var(--violet);color:var(--obsidian)}
:focus-visible{outline:2px solid var(--mint);outline-offset:3px;border-radius:6px}

.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;z-index:200;background:var(--mint);color:var(--obsidian);padding:10px 16px;border-radius:10px;font-weight:700;text-decoration:none}
.skip:focus{top:12px}

.eyebrow{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--f-mono);font-size:.74rem;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);
}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--aurora)}
.grad{background:var(--aurora);-webkit-background-clip:text;background-clip:text;color:transparent}
.serif{font-family:var(--f-serif);font-style:italic;font-weight:400;letter-spacing:-.01em}
.mint{color:var(--mint)}.violet{color:var(--violet)}.peach{color:var(--peach)}

/* ---------- Reading progress ---------- */
.progress{position:fixed;inset:0 0 auto 0;height:3px;z-index:120;pointer-events:none}
.progress span{display:block;height:100%;width:100%;background:var(--aurora);transform-origin:0 50%;transform:scaleX(0)}

/* ---------- Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;height:var(--header-h);
  transition:background .35s var(--ease),border-color .35s var(--ease),backdrop-filter .35s;
  border-bottom:1px solid transparent;
  background:linear-gradient(180deg,rgba(11,13,23,.55),rgba(11,13,23,0));
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.site-header.is-solid{background:rgba(15,18,31,.86);border-bottom-color:rgba(48,53,72,.8);-webkit-backdrop-filter:blur(14px) saturate(140%);backdrop-filter:blur(14px) saturate(140%)}
.header-in{height:100%;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:inline-flex;align-items:center;gap:12px;color:var(--frost);text-decoration:none;font-weight:800;letter-spacing:-.02em}
.brand-mark{
  width:34px;height:34px;border-radius:10px;position:relative;flex:none;
  background:conic-gradient(from 210deg,var(--mint),var(--violet),var(--peach),var(--mint));
}
.brand-mark::after{content:"50";position:absolute;inset:3px;border-radius:8px;background:var(--obsidian);display:grid;place-items:center;font:800 .78rem/1 var(--f-mono);color:var(--frost)}
.brand-name{font-size:1.02rem}
.brand-name b{font-weight:800;background:var(--aurora);-webkit-background-clip:text;background-clip:text;color:transparent}

.nav-toggle{
  display:none;width:46px;height:46px;border-radius:12px;border:1px solid var(--border);
  background:rgba(21,25,40,.7);color:var(--frost);cursor:pointer;position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{position:absolute;left:13px;width:20px;height:2px;background:currentColor;border-radius:2px;transition:transform .3s var(--ease),opacity .2s}
.nav-toggle span{top:22px}
.nav-toggle span::before{content:"";top:-6px;left:0}
.nav-toggle span::after{content:"";top:6px;left:0}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg);background:var(--frost)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg);background:var(--frost)}

.nav-menu{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.nav-menu a{
  display:block;padding:9px 13px;border-radius:999px;color:var(--muted);text-decoration:none;
  font-size:.9rem;font-weight:550;white-space:nowrap;transition:color .2s,background .2s;
}
.nav-menu a:hover{color:var(--frost);background:rgba(155,123,250,.12)}
.nav-menu a[aria-current="page"]{color:var(--obsidian);background:var(--mint)}

@media (max-width:1060px){
  .nav-toggle{display:block}
  .nav-panel{
    position:fixed;inset:var(--header-h) 0 auto 0;max-height:calc(100dvh - var(--header-h));overflow:auto;
    background:rgba(11,13,23,.97);border-bottom:1px solid var(--border);
    padding:18px var(--gutter) 28px;visibility:hidden;opacity:0;transform:translateY(-8px);
    transition:opacity .25s var(--ease),transform .25s var(--ease),visibility 0s .25s;
  }
  .nav-panel.is-open{visibility:visible;opacity:1;transform:none;transition:opacity .25s var(--ease),transform .25s var(--ease)}
  .nav-menu{flex-direction:column;align-items:stretch;gap:2px}
  .nav-menu a{font-size:1.15rem;padding:13px 14px;border-radius:12px;display:flex;justify-content:space-between}
  .nav-menu a::after{content:"→";color:var(--border)}
  .nav-menu a[aria-current="page"]::after{color:var(--obsidian)}
}

/* ---------- Aurora backdrop ---------- */
.aurora{position:absolute;inset:0;overflow:hidden;pointer-events:none;z-index:0}
.aurora::before,.aurora::after{
  content:"";position:absolute;width:70vmax;height:70vmax;border-radius:50%;filter:blur(70px);opacity:.42;
}
.aurora::before{left:-18vmax;top:-30vmax;background:radial-gradient(circle at 50% 50%,rgba(67,230,206,.55),transparent 60%);animation:drift-a 26s ease-in-out infinite alternate}
.aurora::after{right:-22vmax;top:-12vmax;background:radial-gradient(circle at 50% 50%,rgba(155,123,250,.55),rgba(255,184,140,.18) 45%,transparent 65%);animation:drift-b 32s ease-in-out infinite alternate}
.grid-lines{
  position:absolute;inset:0;pointer-events:none;z-index:0;opacity:.35;
  background-image:linear-gradient(rgba(48,53,72,.55) 1px,transparent 1px),linear-gradient(90deg,rgba(48,53,72,.55) 1px,transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:radial-gradient(ellipse 80% 70% at 60% 30%,#000 30%,transparent 75%);
  mask-image:radial-gradient(ellipse 80% 70% at 60% 30%,#000 30%,transparent 75%);
}
@keyframes drift-a{to{transform:translate(12vmax,8vmax) scale(1.12)}}
@keyframes drift-b{to{transform:translate(-10vmax,10vmax) scale(.92)}}

/* ---------- HOME HERO ---------- */
.hero{position:relative;padding:calc(var(--header-h) + clamp(48px,9vw,120px)) 0 clamp(56px,8vw,110px);isolation:isolate;overflow:hidden}
.hero .wrap{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:clamp(28px,5vw,72px);align-items:end}
.hero-title{font-size:clamp(2.5rem,5.3vw,5.1rem);line-height:.94;letter-spacing:-.045em;font-weight:800;margin:.35em 0 .32em}
.hero-title .line{display:block}
@media (min-width:901px){.hero-title .line{white-space:nowrap}.hero-grid{grid-template-columns:minmax(0,1.7fr) minmax(0,.9fr)}}
.hero-title .indent{padding-left:clamp(0px,5vw,84px)}
.hero-lede{font-size:clamp(1.05rem,1.5vw,1.25rem);color:var(--muted);max-width:40ch;margin-bottom:1.6em}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px}
.btn{
  display:inline-flex;align-items:center;gap:.6em;padding:14px 22px;border-radius:999px;
  font-weight:650;font-size:.95rem;text-decoration:none;transition:transform .25s var(--ease),background .25s,color .25s,border-color .25s;
}
.btn-primary{background:var(--frost);color:var(--obsidian)}
.btn-primary:hover{background:var(--mint);color:var(--obsidian);transform:translateY(-2px)}
.btn-ghost{border:1px solid var(--border);color:var(--frost)}
.btn-ghost:hover{border-color:var(--violet);color:var(--frost);transform:translateY(-2px)}

.hero-aside{
  position:relative;border:1px solid var(--border);border-radius:24px;padding:26px;
  background:linear-gradient(160deg,rgba(27,32,51,.82),rgba(21,25,40,.55));
}
.hero-aside::before{content:"";position:absolute;inset:-1px;border-radius:24px;padding:1px;background:var(--aurora);opacity:.45;
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none}
.hero-aside h2{font-size:.78rem;font-family:var(--f-mono);letter-spacing:.16em;text-transform:uppercase;color:var(--muted);font-weight:500;margin-bottom:16px}
.orbit{position:relative;aspect-ratio:1/1;max-width:250px;margin:0 auto 18px}
.orbit .ring{position:absolute;inset:0;border-radius:50%;border:1px dashed rgba(170,180,199,.28)}
.orbit .ring:nth-child(2){inset:16%;border-style:solid;border-color:rgba(155,123,250,.35)}
.orbit .ring:nth-child(3){inset:33%;border-color:rgba(67,230,206,.45)}
.orbit .core{position:absolute;inset:41%;border-radius:50%;background:var(--aurora);box-shadow:0 0 50px rgba(67,230,206,.35)}
.orbit .dot{position:absolute;width:12px;height:12px;border-radius:50%;background:var(--peach);top:50%;left:50%;margin:-6px;transform:rotate(var(--a)) translateX(var(--r)) }
.orbit .spin{position:absolute;inset:0;animation:spin 40s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.hero-aside dl{display:grid;grid-template-columns:auto 1fr;gap:8px 14px;margin:0;font-size:.9rem}
.hero-aside dt{font-family:var(--f-mono);color:var(--mint)}
.hero-aside dd{margin:0;color:var(--muted)}

.hero-ticker{margin-top:clamp(40px,6vw,72px);border-top:1px solid var(--border);padding-top:18px;display:flex;flex-wrap:wrap;gap:10px 28px;font-family:var(--f-mono);font-size:.8rem;color:var(--muted)}
.hero-ticker span::before{content:"◇ ";color:var(--violet)}

/* ---------- Section scaffolding ---------- */
.section{position:relative;padding:clamp(64px,9vw,128px) 0}
.section-head{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(20px,4vw,64px);align-items:end;margin-bottom:clamp(32px,5vw,56px)}
.section-title{font-size:clamp(2rem,4.6vw,3.8rem);letter-spacing:-.04em;margin:.3em 0 0}
.section-intro{color:var(--muted);max-width:52ch;margin:0}
.section-num{font-family:var(--f-mono);font-size:.8rem;color:var(--violet)}
.band{background:var(--surface);border-block:1px solid var(--border)}

/* ---------- Topic rail ---------- */
.rail-wrap{position:relative}
.rail{
  display:grid;grid-auto-flow:column;grid-auto-columns:minmax(260px,1fr);gap:0;
  overflow-x:auto;scroll-snap-type:x mandatory;overscroll-behavior-x:contain;
  border:1px solid var(--border);border-radius:var(--radius);list-style:none;margin:0;padding:0;
  scrollbar-width:thin;scrollbar-color:var(--border) transparent;
}
.rail li{scroll-snap-align:start;border-right:1px solid var(--border)}
.rail li:last-child{border-right:0}
.rail a{
  display:flex;flex-direction:column;height:100%;min-height:340px;padding:26px 24px;color:var(--frost);text-decoration:none;
  position:relative;transition:background .35s var(--ease);
}
.rail a::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--aurora);transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease)}
.rail a:hover,.rail a:focus-visible{background:linear-gradient(180deg,rgba(155,123,250,.10),rgba(67,230,206,.04))}
.rail a:hover::before,.rail a:focus-visible::before{transform:scaleX(1)}
.rail .idx{font-family:var(--f-mono);font-size:.75rem;color:var(--muted)}
.rail .figure{font-size:clamp(3.4rem,5vw,4.6rem);font-weight:800;letter-spacing:-.06em;line-height:1;margin:auto 0 14px;
  background:linear-gradient(180deg,var(--frost),rgba(247,247,255,.25));-webkit-background-clip:text;background-clip:text;color:transparent}
.rail a:hover .figure{background:var(--aurora);-webkit-background-clip:text;background-clip:text}
.rail h3{font-size:1.15rem;margin-bottom:.4em}
.rail p{font-size:.92rem;color:var(--muted);margin:0 0 1em}
.rail .fmt{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--peach)}
.rail-hint{display:none;font-family:var(--f-mono);font-size:.75rem;color:var(--muted);margin-top:12px}
@media (max-width:900px){
  .rail{grid-auto-columns:78%;border-radius:14px}
  .rail-hint{display:block}
}

/* ---------- Framework diagram ---------- */
.framework{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:0;counter-reset:fw;position:relative}
.framework::before{content:"";position:absolute;left:4%;right:4%;top:46px;height:1px;background:linear-gradient(90deg,var(--mint),var(--violet),var(--peach));opacity:.6}
.fw-node{position:relative;padding:0 14px;text-align:left}
.fw-node .pin{
  width:92px;height:92px;border-radius:50%;display:grid;place-items:center;margin-bottom:20px;position:relative;z-index:1;
  background:var(--obsidian);border:1px solid var(--border);font-family:var(--f-mono);font-size:.8rem;color:var(--muted)
}
.fw-node .pin b{display:block;font:800 1.5rem/1 var(--f-sans);color:var(--frost);text-align:center}
.fw-node:nth-child(1) .pin{border-color:var(--mint)}
.fw-node:nth-child(3) .pin{border-color:var(--violet)}
.fw-node:nth-child(5) .pin{border-color:var(--peach)}
.fw-node h3{font-size:1.08rem}
.fw-node p{font-size:.9rem;color:var(--muted);margin:0}
.fw-node .tag{display:inline-block;margin-top:12px;font-family:var(--f-mono);font-size:.7rem;padding:4px 9px;border-radius:999px;border:1px solid var(--border);color:var(--muted)}
.fw-legend{margin-top:40px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--border);border:1px solid var(--border);border-radius:14px;overflow:hidden}
.fw-legend div{background:var(--surface);padding:18px 20px;font-size:.92rem;color:var(--muted)}
.fw-legend strong{display:block;margin-bottom:4px}
@media (max-width:900px){
  .framework{grid-template-columns:1fr;gap:28px}
  .framework::before{left:46px;right:auto;top:20px;bottom:20px;width:1px;height:auto;background:linear-gradient(180deg,var(--mint),var(--violet),var(--peach))}
  .fw-node{display:grid;grid-template-columns:92px 1fr;gap:18px;padding:0}
  .fw-node .pin{margin:0}
  .fw-legend{grid-template-columns:1fr}
}

/* ---------- Editorial split ---------- */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:clamp(28px,6vw,96px)}
.split-sticky{position:sticky;top:calc(var(--header-h) + 32px);align-self:start}
.mega-quote{font-family:var(--f-serif);font-style:italic;font-size:clamp(1.9rem,4vw,3.3rem);line-height:1.12;letter-spacing:-.02em;margin:.4em 0 .6em}
.unknowns{list-style:none;margin:0;padding:0;counter-reset:u}
.unknowns li{counter-increment:u;display:grid;grid-template-columns:64px 1fr;gap:18px;padding:26px 0;border-top:1px solid var(--border)}
.unknowns li:last-child{border-bottom:1px solid var(--border)}
.unknowns li::before{content:counter(u,decimal-leading-zero);font:800 1.8rem/1 var(--f-sans);letter-spacing:-.04em;color:transparent;-webkit-text-stroke:1px var(--violet)}
.unknowns h3{font-size:1.22rem;margin-bottom:.35em}
.unknowns p{color:var(--muted);margin:0}
@media (max-width:900px){.split{grid-template-columns:1fr}.split-sticky{position:static}}

/* ---------- Tables (responsive stack) ---------- */
.table-shell{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--surface)}
.rtable{width:100%;border-collapse:collapse;font-size:.95rem}
.rtable caption{text-align:left;padding:18px 22px;font-family:var(--f-mono);font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);border-bottom:1px solid var(--border)}
.rtable th,.rtable td{padding:16px 22px;text-align:left;vertical-align:top;border-bottom:1px solid var(--border)}
.rtable thead th{font-family:var(--f-mono);font-size:.74rem;font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--mint);background:rgba(11,13,23,.5)}
.rtable tbody tr:last-child>*{border-bottom:0}
.rtable tbody th{font-weight:700;color:var(--frost);width:22%}
.rtable td{color:var(--muted)}
.rtable tbody tr:hover{background:rgba(155,123,250,.06)}
@media (max-width:720px){
  .rtable thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
  .rtable,.rtable tbody,.rtable tr,.rtable th,.rtable td{display:block;width:100%}
  .rtable tbody tr{padding:16px 18px;border-bottom:1px solid var(--border)}
  .rtable tbody tr:last-child{border-bottom:0}
  .rtable th,.rtable td{padding:4px 0;border:0}
  .rtable tbody th{width:100%;font-size:1.05rem;margin-bottom:6px}
  .rtable td[data-label]::before{content:attr(data-label);display:block;font-family:var(--f-mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--violet);margin-top:8px}
}

/* ---------- Q&A (common interpretations) ---------- */
.qa{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.qa article{background:var(--obsidian);padding:clamp(22px,3vw,34px)}
.qa .q{font-size:1.18rem;margin-bottom:.7em;display:flex;gap:12px}
.qa .q::before{content:"Q";font-family:var(--f-mono);font-size:.8rem;color:var(--obsidian);background:var(--peach);border-radius:6px;padding:2px 7px;height:fit-content;margin-top:3px}
.qa p{color:var(--muted);margin:0}
@media (max-width:760px){.qa{grid-template-columns:1fr}}

/* ---------- Continue reading index ---------- */
.index-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--border)}
.index-list a{
  display:grid;grid-template-columns:80px minmax(0,1.1fr) minmax(0,1fr) 40px;gap:20px;align-items:center;
  padding:26px 6px;border-bottom:1px solid var(--border);color:var(--frost);text-decoration:none;transition:padding .35s var(--ease),background .35s
}
.index-list a:hover,.index-list a:focus-visible{padding-left:18px;background:linear-gradient(90deg,rgba(67,230,206,.07),transparent 70%)}
.index-list .n{font-family:var(--f-mono);color:var(--violet);font-size:.85rem}
.index-list .t{font-size:clamp(1.3rem,2.4vw,2rem);font-weight:750;letter-spacing:-.03em}
.index-list .d{color:var(--muted);font-size:.92rem}
.index-list .arr{font-size:1.4rem;color:var(--mint);transition:transform .3s var(--ease)}
.index-list a:hover .arr{transform:translateX(6px)}
@media (max-width:760px){
  .index-list a{grid-template-columns:44px 1fr 24px;gap:12px}
  .index-list .d{grid-column:2/3}
  .index-list .arr{grid-row:1;grid-column:3}
}

/* ---------- Footer ---------- */
.site-footer{position:relative;overflow:hidden;background:#07080F;border-top:1px solid var(--border);padding:clamp(56px,8vw,96px) 0 32px}
.site-footer::before{content:"";position:absolute;left:50%;top:-40%;width:110%;height:80%;transform:translateX(-50%);background:radial-gradient(ellipse at center,rgba(155,123,250,.18),transparent 65%);pointer-events:none}
.foot-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) minmax(0,1fr);gap:clamp(28px,5vw,64px)}
.foot-grid h2{font-family:var(--f-mono);font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);font-weight:500;margin-bottom:16px}
.foot-grid ul{list-style:none;padding:0;margin:0}
.foot-grid li{margin-bottom:8px}
.foot-grid a{color:var(--frost);text-decoration:none}
.foot-grid a:hover{color:var(--mint)}
.foot-about{color:var(--muted);font-size:.94rem;max-width:46ch}
.wordmark{
  position:relative;display:block;margin:clamp(48px,7vw,88px) 0 24px;font-weight:800;letter-spacing:-.06em;line-height:.8;
  font-size:clamp(3rem,13.5vw,12.5rem);white-space:nowrap;
  background:linear-gradient(180deg,rgba(247,247,255,.95) 10%,rgba(155,123,250,.35) 70%,rgba(11,13,23,0));
  -webkit-background-clip:text;background-clip:text;color:transparent;user-select:none
}
.foot-base{position:relative;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;border-top:1px solid var(--border);padding-top:22px;font-size:.84rem;color:var(--muted)}
@media (max-width:860px){.foot-grid{grid-template-columns:1fr 1fr}.foot-grid>div:first-child{grid-column:1/-1}}
@media (max-width:480px){.foot-grid{grid-template-columns:1fr}}

/* ==========================================================
   ARTICLE PAGES
   ========================================================== */
.art-hero{position:relative;isolation:isolate;overflow:hidden;padding:calc(var(--header-h) + clamp(36px,6vw,80px)) 0 clamp(40px,6vw,72px);border-bottom:1px solid var(--border)}
.art-hero .wrap{position:relative;z-index:1}
.crumbs ol{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:0 0 28px;padding:0;font-family:var(--f-mono);font-size:.78rem;color:var(--muted)}
.crumbs li+li::before{content:"/";margin-right:6px;color:var(--border)}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--mint)}
.crumbs [aria-current]{color:var(--frost)}
.art-hero-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,.7fr);gap:clamp(24px,5vw,64px);align-items:end}
.art-title{font-size:clamp(2.3rem,6vw,5rem);line-height:.98;letter-spacing:-.045em;font-weight:800;margin:.3em 0 .35em}
.art-lede{font-size:clamp(1.05rem,1.45vw,1.22rem);color:var(--muted);max-width:56ch;margin:0}
.art-numeral{
  font-weight:800;letter-spacing:-.07em;line-height:.8;text-align:right;font-size:clamp(5rem,15vw,13rem);
  color:transparent;-webkit-text-stroke:1.5px rgba(247,247,255,.28);position:relative
}
.art-numeral span{position:absolute;inset:0;background:var(--aurora);-webkit-background-clip:text;background-clip:text;-webkit-text-stroke:0;clip-path:inset(55% 0 0 0)}
.art-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.chip{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;padding:6px 11px;border-radius:999px;border:1px solid var(--border);color:var(--muted)}
.chip.on{border-color:var(--mint);color:var(--mint)}
@media (max-width:760px){.art-hero-grid{grid-template-columns:1fr}.art-numeral{text-align:left;font-size:clamp(4.4rem,26vw,8rem);order:-1}}

.art-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:clamp(32px,5vw,80px);padding-block:clamp(40px,6vw,80px)}
.toc{position:sticky;top:calc(var(--header-h) + 28px);align-self:start;max-height:calc(100vh - var(--header-h) - 56px);overflow:auto}
.toc h2{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);font-weight:500;margin-bottom:14px}
.toc ol{list-style:none;margin:0;padding:0;border-left:1px solid var(--border)}
.toc a{display:block;padding:7px 0 7px 16px;margin-left:-1px;border-left:2px solid transparent;color:var(--muted);text-decoration:none;font-size:.9rem;line-height:1.4;transition:color .2s,border-color .2s}
.toc a:hover{color:var(--frost)}
.toc a.is-active{color:var(--frost);border-left-color:var(--mint)}
.toc-mobile{display:none}
@media (max-width:1000px){
  .art-layout{grid-template-columns:1fr}
  .toc{display:none}
  .toc-mobile{
    display:block;position:sticky;top:calc(var(--header-h) + 8px);z-index:20;margin-bottom:28px;
    background:rgba(21,25,40,.94);border:1px solid var(--border);border-radius:14px;
    -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)
  }
  .toc-mobile summary{list-style:none;cursor:pointer;padding:12px 16px;font-size:.88rem;display:flex;justify-content:space-between;gap:12px;color:var(--frost)}
  .toc-mobile summary::-webkit-details-marker{display:none}
  .toc-mobile summary::after{content:"+";font-family:var(--f-mono);color:var(--mint)}
  .toc-mobile[open] summary::after{content:"−"}
  .toc-mobile summary span{font-family:var(--f-mono);color:var(--muted);font-size:.75rem;text-transform:uppercase;letter-spacing:.12em}
  .toc-mobile ol{margin:0;padding:0 16px 14px 34px;max-height:50vh;overflow:auto}
  .toc-mobile li{padding:4px 0}
  .toc-mobile a{color:var(--muted);text-decoration:none;font-size:.92rem}
}

/* prose */
.prose{max-width:74ch;min-width:0}
.prose>section{padding-bottom:clamp(28px,4vw,44px)}
.prose h2{font-size:clamp(1.65rem,3vw,2.4rem);margin-top:.6em;letter-spacing:-.035em}
.prose h2 .k{display:block;font-family:var(--f-mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--violet);font-weight:500;margin-bottom:12px}
.prose h3{font-size:clamp(1.2rem,1.9vw,1.42rem);margin-top:1.6em;letter-spacing:-.02em}
.prose p,.prose li{color:#D4D9E6}
.prose li{margin-bottom:.5em}
.prose li::marker{color:var(--mint)}
.lead-answer{font-size:clamp(1.12rem,1.6vw,1.3rem);line-height:1.6;color:var(--frost)!important;border-left:3px solid var(--mint);padding-left:20px;margin-bottom:1.6em}

.callout{position:relative;border:1px solid var(--border);border-radius:16px;padding:22px 24px 20px;margin:1.8em 0;background:linear-gradient(145deg,rgba(27,32,51,.9),rgba(21,25,40,.6))}
.callout .lbl{display:inline-block;font-family:var(--f-mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--obsidian);background:var(--mint);padding:3px 9px;border-radius:6px;margin-bottom:10px}
.callout.warn .lbl{background:var(--peach)}
.callout.violet .lbl{background:var(--violet)}
.callout p:last-child{margin-bottom:0}

.formula{font-family:var(--f-mono);font-size:clamp(.9rem,1.6vw,1.05rem);background:var(--obsidian);border:1px dashed var(--border);border-radius:12px;padding:18px 20px;margin:1.4em 0;color:var(--mint);overflow-x:auto;white-space:nowrap}
.formula small{display:block;color:var(--muted);font-size:.78rem;margin-top:6px;white-space:normal}

/* numbered notes (slot-bet-50) */
.notes{list-style:none;padding:0;margin:1.6em 0;counter-reset:n}
.notes li{counter-increment:n;position:relative;padding:18px 0 18px 64px;border-top:1px solid var(--border);margin:0}
.notes li::before{content:"N–" counter(n,decimal-leading-zero);position:absolute;left:0;top:20px;font-family:var(--f-mono);font-size:.78rem;color:var(--peach)}
.notes li strong{display:block;margin-bottom:4px}

/* unit decoder (slot-bet-50) */
.decoder{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:1.6em 0}
.decoder div{border:1px solid var(--border);border-radius:14px;padding:18px;background:var(--surface)}
.decoder .v{font:800 1.9rem/1 var(--f-sans);letter-spacing:-.04em;margin-bottom:8px}
.decoder .u{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--mint);display:block;margin-bottom:8px}
.decoder p{font-size:.9rem;margin:0;color:var(--muted)!important}
@media (max-width:640px){.decoder{grid-template-columns:1fr}}

/* walkthrough steps (slot-bet-100) */
.steps{list-style:none;margin:1.6em 0;padding:0;counter-reset:s}
.steps li{counter-increment:s;display:grid;grid-template-columns:48px 1fr;gap:16px;margin-bottom:22px}
.steps li::before{content:counter(s);width:48px;height:48px;border-radius:50%;display:grid;place-items:center;font:800 1.1rem/1 var(--f-sans);color:var(--obsidian);background:var(--aurora)}
.steps li>div strong{display:block;margin-bottom:2px}

.layers{display:grid;gap:10px;margin:1.6em 0}
.layer{display:grid;grid-template-columns:150px 1fr;gap:16px;align-items:center;padding:14px 18px;border-radius:12px;border:1px solid var(--border);background:var(--surface)}
.layer b{font-family:var(--f-mono);font-size:.8rem;color:var(--mint);font-weight:500}
.layer:nth-child(2) b{color:var(--violet)}
.layer:nth-child(3) b{color:var(--peach)}
.layer span{color:var(--muted);font-size:.94rem}
@media (max-width:560px){.layer{grid-template-columns:1fr;gap:4px}}

/* accumulation bars (slot-bet-200) */
.bars{border:1px solid var(--border);border-radius:16px;padding:22px;background:var(--surface);margin:1.6em 0}
.bars figcaption{font-family:var(--f-mono);font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:18px}
.bar{display:grid;grid-template-columns:110px 1fr 96px;gap:14px;align-items:center;margin-bottom:12px;font-size:.88rem}
.bar .lbl{color:var(--muted);font-family:var(--f-mono)}
.bar .trk{height:12px;border-radius:999px;background:rgba(48,53,72,.6);overflow:hidden}
.bar .fill{display:block;height:100%;width:var(--w);border-radius:999px;background:var(--aurora)}
.bar .val{text-align:right;font-family:var(--f-mono);color:var(--frost)}
.bars .foot{font-size:.82rem;color:var(--muted);margin:14px 0 0}
@media (max-width:520px){.bar{grid-template-columns:1fr 84px}.bar .lbl{grid-column:1/-1}}

.case{border-left:2px solid var(--violet);padding:4px 0 4px 22px;margin:1.6em 0}
.case h3{margin-top:0}
.timeline{list-style:none;margin:1.4em 0;padding:0;position:relative}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:1px;background:linear-gradient(180deg,var(--mint),var(--peach))}
.timeline li{position:relative;padding-left:34px;margin-bottom:18px}
.timeline li::before{content:"";position:absolute;left:0;top:7px;width:15px;height:15px;border-radius:50%;background:var(--obsidian);border:2px solid var(--mint)}
.timeline li:nth-child(even)::before{border-color:var(--violet)}
.timeline .when{display:block;font-family:var(--f-mono);font-size:.74rem;color:var(--peach);letter-spacing:.08em;text-transform:uppercase}

/* myth vs fact (slot-bet-500) */
.mf{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--border);border-radius:16px;overflow:hidden;margin:1.4em 0}
.mf>div{padding:20px 22px}
.mf .m{background:rgba(255,184,140,.06);border-right:1px solid var(--border)}
.mf .f{background:rgba(67,230,206,.05)}
.mf .tag{display:block;font-family:var(--f-mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;margin-bottom:8px}
.mf .m .tag{color:var(--peach)}
.mf .f .tag{color:var(--mint)}
.mf .m p{font-family:var(--f-serif);font-style:italic;font-size:1.12rem;color:var(--frost)!important}
.mf p{margin:0}
@media (max-width:640px){.mf{grid-template-columns:1fr}.mf .m{border-right:0;border-bottom:1px solid var(--border)}}

/* structured reference (slot-bet-1000) */
.defs{display:grid;grid-template-columns:minmax(0,200px) minmax(0,1fr);border-top:1px solid var(--border);margin:1.4em 0}
.defs dt,.defs dd{padding:16px 0;border-bottom:1px solid var(--border);margin:0}
.defs dt{font-weight:700;color:var(--frost);padding-right:20px}
.defs dd{color:#D4D9E6}
@media (max-width:600px){.defs{grid-template-columns:1fr}.defs dt{border-bottom:0;padding-bottom:2px}.defs dd{padding-top:2px}}
.riskgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:1.6em 0}
.riskgrid div{border:1px solid var(--border);border-radius:14px;padding:18px 20px;background:var(--surface)}
.riskgrid h3{margin:0 0 .4em;font-size:1.05rem}
.riskgrid .lv{font-family:var(--f-mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--peach);display:block;margin-bottom:8px}
.riskgrid p{font-size:.92rem;margin:0;color:var(--muted)!important}
@media (max-width:640px){.riskgrid{grid-template-columns:1fr}}
.summary{border-radius:18px;padding:26px 26px 12px;margin:1.6em 0;background:linear-gradient(135deg,rgba(67,230,206,.10),rgba(155,123,250,.10) 55%,rgba(255,184,140,.08));border:1px solid var(--border)}
.summary ol{margin:0;padding-left:1.2em}

/* glossary */
.glossary{margin:1.4em 0;border-top:1px solid var(--border)}
.glossary details{border-bottom:1px solid var(--border)}
.glossary summary{cursor:pointer;list-style:none;padding:18px 40px 18px 0;position:relative;font-weight:650;font-size:1.06rem;color:var(--frost)}
.glossary summary::-webkit-details-marker{display:none}
.glossary summary::after{content:"";position:absolute;right:6px;top:50%;width:12px;height:12px;margin-top:-8px;border-right:2px solid var(--mint);border-bottom:2px solid var(--mint);transform:rotate(45deg);transition:transform .25s var(--ease)}
.glossary details[open] summary::after{transform:rotate(225deg);margin-top:-2px}
.glossary summary small{font-family:var(--f-mono);font-weight:400;font-size:.72rem;color:var(--violet);margin-left:10px;letter-spacing:.08em}
.glossary .gbody{padding:0 0 18px}
.glossary .gbody p{margin:0;color:var(--muted)!important}

/* related reading */
.related{margin-top:clamp(36px,5vw,56px);padding-top:28px;border-top:1px solid var(--border)}
.related h2{font-size:1.4rem}
.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.related-grid a{display:block;padding:20px 22px;border:1px solid var(--border);border-radius:14px;text-decoration:none;color:var(--frost);background:var(--surface);transition:border-color .25s,transform .25s var(--ease)}
.related-grid a:hover{border-color:var(--violet);transform:translateY(-3px);color:var(--frost)}
.related-grid .r-k{display:block;font-family:var(--f-mono);font-size:.72rem;color:var(--mint);letter-spacing:.12em;text-transform:uppercase;margin-bottom:6px}
.related-grid .r-t{font-weight:700;font-size:1.08rem;display:block;margin-bottom:4px}
.related-grid .r-d{color:var(--muted);font-size:.9rem}
@media (max-width:600px){.related-grid{grid-template-columns:1fr}}

/* pager */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:28px}
.pager a{display:block;padding:18px 20px;border-radius:14px;border:1px solid var(--border);text-decoration:none;color:var(--frost)}
.pager a:hover{border-color:var(--mint);color:var(--frost)}
.pager small{display:block;font-family:var(--f-mono);font-size:.7rem;color:var(--muted);text-transform:uppercase;letter-spacing:.12em}
.pager .next{text-align:right}

/* reveal */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
.no-js .reveal{opacity:1;transform:none}

@media (max-width:900px){
  .hero-grid,.section-head{grid-template-columns:1fr}
  .hero-title .indent{padding-left:0}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}