/* Math & Mythology — midnight, parchment and gold */
:root{
  --night:#141a2b;--night-2:#1c2440;--night-3:#252f52;
  --gold:#d9a94a;--gold-soft:#ead09a;--terracotta:#c8643f;--teal:#4f7f79;--plum:#7a5a86;
  --parchment:#efe4cc;--paper:#faf6ec;--card:#fffdf7;
  --text:#1f2333;--muted:#6c6858;--line:#e4dac4;
  --display:'Cormorant Garamond',Garamond,'Times New Roman',serif;
  --serif:'Source Serif 4',Georgia,'Times New Roman',serif;
  --sans:system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --wrap:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--text);font:400 17px/1.65 var(--serif)}
img,svg{max-width:100%;display:block}
a{color:inherit}
.wrap{width:min(var(--wrap),calc(100% - 48px));margin:0 auto}
.skip{position:absolute;left:-999px;top:8px;background:var(--gold);color:var(--night);padding:8px 14px;border-radius:6px;z-index:10;font:600 14px var(--sans)}.skip:focus{left:12px}
.eyebrow{font:700 12px/1.4 var(--sans);letter-spacing:2.2px;text-transform:uppercase;color:var(--terracotta);margin:0 0 14px}
h1,h2,h3{font-family:var(--display);font-weight:600;line-height:1.1;letter-spacing:-.3px;margin:0}
.button{display:inline-block;background:var(--gold);color:var(--night);font:700 14px/1 var(--sans);padding:15px 22px;border-radius:999px;text-decoration:none;border:1.5px solid var(--gold);transition:transform .15s,background .15s}
.button:hover{transform:translateY(-1px);background:var(--gold-soft)}
.button.ghost{background:transparent;color:var(--parchment);border-color:rgba(239,228,204,.4)}.button.ghost:hover{border-color:var(--parchment);background:rgba(239,228,204,.06)}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}

/* Top bar */
.topbar{background:var(--night);color:var(--parchment);border-bottom:1px solid rgba(217,169,74,.18)}
.topbar-in{display:flex;justify-content:space-between;align-items:center;gap:20px;min-height:72px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font:600 23px/1 var(--display);letter-spacing:.2px;color:var(--parchment)}
.brand i{color:var(--gold);font-style:italic}
.brand-mark{width:30px;height:30px;color:var(--gold);flex:none}
.topbar nav{display:flex;gap:26px;font:600 14px var(--sans)}
.topbar nav a{text-decoration:none;color:#cfc6b0;padding:6px 0;border-bottom:1.5px solid transparent}
.topbar nav a:hover,.topbar nav a[aria-current]{color:var(--parchment);border-color:var(--gold)}

/* Hero */
.hero{background:radial-gradient(ellipse at 75% 40%,var(--night-3) 0,var(--night) 62%);color:var(--parchment);overflow:hidden}
.hero-in{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding:84px 0 92px}
.hero h1{font-size:clamp(46px,6.4vw,86px);line-height:.98;font-weight:600;letter-spacing:-1.5px}
.hero h1 em{color:var(--gold);font-style:italic;font-weight:500}
.hero .eyebrow{color:var(--gold)}
.hero-text{font-size:19px;line-height:1.6;color:#d7cdb5;max-width:540px;margin:26px 0 32px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:0}
.hero-art svg{width:100%;max-width:440px;margin-left:auto;filter:drop-shadow(0 0 40px rgba(217,169,74,.12))}
.spin{transform-origin:200px 200px;animation:spin 140s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.spin{animation:none}html{scroll-behavior:auto}}

/* Blocks & cards */
.block{padding:64px 0 8px}
.block-head{display:flex;justify-content:space-between;align-items:baseline;gap:20px;margin-bottom:24px;flex-wrap:wrap}
.block-head h2,.traditions-block h2{font-size:clamp(30px,3.4vw,40px)}
.block-head a,.text-link{font:600 14px var(--sans);color:var(--terracotta);text-decoration:none}
.block-head a:hover,.text-link:hover{text-decoration:underline}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.card{display:flex;flex-direction:column;text-decoration:none;background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(20,26,43,.12)}
.cover{background:radial-gradient(circle at 50% 45%,var(--night-2),var(--night));aspect-ratio:400/260}
.cover svg{width:100%;height:100%}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:8px;flex:1}
.card-meta{font:700 11px/1.3 var(--sans);letter-spacing:1.6px;text-transform:uppercase;color:var(--terracotta);margin:0;display:flex;justify-content:space-between;gap:10px}
.card-meta span{color:var(--muted);letter-spacing:1px}
.card h3{font-size:26px;line-height:1.12}
.card p{margin:0;font-size:15.5px;line-height:1.55;color:#4d4a40}
.card .card-trads{margin-top:auto;padding-top:8px;font:600 12.5px var(--sans);color:var(--teal)}
.card.feature{display:grid;grid-template-columns:1.15fr 1fr}
.card.feature .cover{aspect-ratio:auto;min-height:340px}
.card.feature .card-body{padding:40px 42px;justify-content:center}
.card.feature h3{font-size:clamp(32px,3.6vw,46px)}
.card.feature p{font-size:17.5px}
.empty-note{font-size:18px;color:var(--muted);background:var(--card);border:1px dashed var(--line);border-radius:12px;padding:28px}

/* Series */
.series-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.series-card{display:flex;flex-direction:column;gap:10px;text-decoration:none;background:var(--night);color:var(--parchment);border-radius:14px;padding:24px 22px;min-height:260px;position:relative;overflow:hidden;transition:transform .2s}
.series-card::after{content:"";position:absolute;right:-50px;bottom:-50px;width:150px;height:150px;border:1px solid rgba(217,169,74,.25);border-radius:50%}
.series-card:hover{transform:translateY(-3px)}
.series-num{font:600 34px/1 var(--display);color:var(--gold)}
.series-card h3{font-size:26px}
.series-card p{margin:0;font-size:14.5px;line-height:1.5;color:#cbc2ab}
.series-count{margin-top:auto;font:700 12px var(--sans);letter-spacing:1px;text-transform:uppercase;color:var(--gold)}

/* Principles */
.principles{background:var(--night);color:var(--parchment);margin-top:72px;padding:64px 0}
.principles .eyebrow{color:var(--gold)}
.principles-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin:6px 0 30px}
.p-num{font:italic 500 30px/1 var(--display);color:var(--gold)}
.principles h3{font-size:28px;margin:10px 0 8px}
.principles p{margin:0;color:#cbc2ab;font-size:16px}
.principles .text-link{color:var(--gold)}

/* Traditions */
.traditions-block{padding-bottom:80px}
.trad-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.trad-chips a{font:600 14px var(--sans);text-decoration:none;padding:10px 17px;border:1px solid var(--line);background:var(--card);border-radius:999px}
.trad-chips a:hover,.trad-chips a[aria-current]{background:var(--night);color:var(--parchment);border-color:var(--night)}

/* Page heads (library, legal) */
.page-head{background:var(--night);color:var(--parchment);padding:64px 0 46px}
.page-head .eyebrow{color:var(--gold)}
.page-head h1{font-size:clamp(42px,5.4vw,70px)}
.page-head .lede{color:#d2c8b0;max-width:680px;font-size:19px;margin:16px 0 0}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-top:30px}
.tabs a{font:600 13.5px var(--sans);text-decoration:none;color:#d2c8b0;padding:9px 15px;border:1px solid rgba(239,228,204,.22);border-radius:999px}
.tabs a:hover{border-color:var(--gold);color:var(--parchment)}
.tabs a[aria-current]{background:var(--gold);border-color:var(--gold);color:var(--night)}

/* Story */
.story-head{background:radial-gradient(ellipse at 85% 30%,var(--night-3) 0,var(--night) 60%);color:var(--parchment);padding:46px 0 56px}
.story-head-in{display:grid;grid-template-columns:1.25fr .75fr;gap:48px;align-items:center}
.crumb{font:600 13px var(--sans);color:var(--gold);text-decoration:none;letter-spacing:.3px}
.crumb:hover{text-decoration:underline}
.story-head h1{font-size:clamp(40px,5.2vw,68px);line-height:1.02;margin:22px 0 18px;letter-spacing:-1px}
.story-head .lede{font-size:20px;line-height:1.55;color:#d7cdb5;margin:0 0 28px;max-width:640px}
.story-meta{display:grid;grid-template-columns:repeat(3,auto);justify-content:start;gap:12px 36px;margin:0;padding-top:22px;border-top:1px solid rgba(217,169,74,.25)}
.story-meta dt{font:700 11px var(--sans);letter-spacing:1.8px;text-transform:uppercase;color:var(--gold);margin-bottom:4px}
.story-meta dd{margin:0;font-size:15.5px;color:var(--parchment)}
.story-meta a{text-decoration:none;border-bottom:1px solid rgba(217,169,74,.5)}
.story-cover{border-radius:16px;overflow:hidden;border:1px solid rgba(217,169,74,.22);background:radial-gradient(circle at 50% 45%,var(--night-2),#10162a)}
.story-layout{display:grid;grid-template-columns:220px minmax(0,720px);gap:64px;justify-content:center;padding:56px 0 40px}
.toc{position:sticky;top:24px;align-self:start;font-family:var(--sans)}
.toc p{font:700 11px var(--sans);letter-spacing:1.8px;text-transform:uppercase;color:var(--muted);margin:0 0 12px}
.toc ol{list-style:none;margin:0;padding:0;border-left:1px solid var(--line)}
.toc a{display:block;padding:7px 0 7px 16px;margin-left:-1px;border-left:2px solid transparent;font-size:14px;text-decoration:none;color:#4d4a40}
.toc a:hover{border-color:var(--gold);color:var(--text)}
.prose{font-size:18.5px;line-height:1.75}
.prose p{margin:0 0 1.15em}
.prose h2{font-size:clamp(28px,3vw,36px);margin:0 0 18px}
.intro p{font-size:21px;line-height:1.65}
.intro>p:first-child::first-letter{float:left;font:600 74px/.82 var(--display);color:var(--terracotta);margin:8px 10px 0 0}
.parallel-note{font:italic 400 16px var(--serif);color:var(--muted);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:12px 0;margin:28px 0 8px!important}
.account{padding:42px 0 18px;border-bottom:1px solid var(--line);scroll-margin-top:20px}
.account-label{font:700 12px var(--sans)!important;letter-spacing:2.2px;text-transform:uppercase;margin:0 0 10px!important;display:flex;align-items:center;gap:10px}
.account-label::before{content:"";width:22px;height:2px;background:currentColor}
.account.t0 .account-label{color:var(--terracotta)}.account.t1 .account-label{color:var(--teal)}.account.t2 .account-label{color:var(--plum)}.account.t3 .account-label{color:#9a7424}
.account h2 em,.sources em,.reading em{font-style:italic}
.math{margin:44px 0 20px;padding:36px 36px 22px;border-radius:16px;background-color:#fbf7ee;background-image:linear-gradient(rgba(79,127,121,.09) 1px,transparent 1px),linear-gradient(90deg,rgba(79,127,121,.09) 1px,transparent 1px);background-size:22px 22px;border:1px solid #dcd3bd;scroll-margin-top:20px}
.math .account-label{color:var(--teal)}
.figures{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:6px 0 26px}
.figure{background:var(--night);color:var(--parchment);border-radius:11px;padding:16px 16px 14px}
.figure b{display:block;font:600 27px/1.1 var(--display);color:var(--gold)}
.figure span{display:block;font:500 13px/1.35 var(--sans);color:#cbc2ab;margin-top:6px}
.threads{padding:30px 0 8px;scroll-margin-top:20px}
.threads .account-label{color:var(--terracotta)}
.threads p{font-size:19.5px}
.sources{border-top:2px solid var(--night);margin-top:28px;padding-top:26px;scroll-margin-top:20px}
.sources h2{font-size:26px;margin:0 0 12px}
.sources ol{margin:0 0 30px;padding-left:22px;font-size:15.5px;line-height:1.55}
.sources li{margin-bottom:6px}
.reading{list-style:none;margin:0;padding:0}
.reading a{display:flex;justify-content:space-between;gap:16px;align-items:baseline;padding:13px 0;border-bottom:1px solid var(--line);text-decoration:none;font-size:16.5px}
.reading a .r-cta{font:600 12.5px var(--sans);color:var(--terracotta);white-space:nowrap}
.reading a:hover .r-cta{text-decoration:underline}
.small-note{font:400 13px var(--sans)!important;color:var(--muted);margin-top:12px!important}
.made{margin:38px 0 0;padding:18px 22px;background:#f2ecdd;border-radius:12px;font:400 14.5px/1.6 var(--sans);color:#4d4a40}
.made p{margin:0}

.back{font:600 13px var(--sans);color:var(--terracotta);text-decoration:none}.back:hover{text-decoration:underline}

/* Legal & about */
.legal{max-width:760px;padding:52px 0 90px}
.legal h2{margin-top:38px}
.legal .byline{font:600 13px var(--sans);color:var(--muted)}

/* 404 */
.empty{text-align:center;padding:60px 0 100px}
.empty svg{width:260px;margin:0 auto 20px;background:var(--night);border-radius:16px}
.empty h1{font-size:clamp(40px,5vw,60px);margin-bottom:12px}
.empty p{color:var(--muted)}

/* Ads stay invisible until filled */
.ad-slot{margin:36px auto;text-align:center}
.ad-slot:has(ins[data-ad-status="unfilled"]){display:none}
.ad-label{display:block;visibility:hidden;font:600 10px var(--sans);letter-spacing:1.5px;text-transform:uppercase;color:#a49d89;margin-bottom:6px}
.ad-slot:has(ins[data-ad-status="filled"]) .ad-label{visibility:visible}
.ad-wide{grid-column:1/-1}

/* Footer */
.footer{background:var(--night);color:#cbc2ab;padding:56px 0 30px;font-family:var(--sans)}
.footer-in{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap}
.footer p{margin:12px 0 0;font:italic 400 17px var(--serif)}
.footer-nav{display:flex;gap:22px;flex-wrap:wrap;font-size:14px}
.footer-nav a{text-decoration:none}.footer-nav a:hover{color:var(--parchment)}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid rgba(217,169,74,.18);margin-top:40px;padding-top:20px;font-size:12.5px;color:#8f8875}

/* Responsive */
@media (max-width:1080px){.series-grid{grid-template-columns:repeat(3,1fr)}.story-layout{grid-template-columns:minmax(0,720px)}.toc{display:none}}
@media (max-width:860px){
  .hero-in,.story-head-in{grid-template-columns:1fr}.hero-in{padding:56px 0 64px}.hero-art{order:-1}.hero-art svg{max-width:240px;margin:0}
  .story-cover{max-width:440px}.story-meta{grid-template-columns:1fr 1fr}
  .grid,.principles-grid{grid-template-columns:1fr 1fr}.card.feature{grid-template-columns:1fr}.card.feature .cover{min-height:0;aspect-ratio:400/260}.card.feature .card-body{padding:26px}
  .series-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:600px){
  .wrap{width:calc(100% - 32px)}
  .topbar nav{gap:16px;font-size:13px}.brand{font-size:20px}.brand-mark{width:26px;height:26px}
  .topbar nav a[href="/#series"]{display:none}
  .grid,.principles-grid,.series-grid{grid-template-columns:1fr}.series-card{min-height:0}
  .story-meta{grid-template-columns:1fr}.prose{font-size:17.5px}.intro p{font-size:19px}.math{padding:26px 20px 14px}
  .reading a{flex-direction:column;gap:2px}
}