:root{
--bg-canvas:#0b0b0d;--bg-surface:#16161a;--bg-surface-hover:#1d1d23;--text-primary:#ececef;--text-muted:#c0c4cc;
--accent-primary:#dc2626;--accent-secondary:#c0c4cc;--border-subtle:rgba(192,196,204,.18);--silver:#c0c4cc;
--ease-kinetic:cubic-bezier(0.16,1,0.3,1);--shadow-elevation:0 12px 32px -4px rgba(0,0,0,.55);--glow-accent:0 0 24px -4px var(--accent-primary);
--shadow-soft:0 6px 22px -6px rgba(0,0,0,.6);--glass-backdrop:blur(16px) saturate(180%);
--serif:Charter,"Bitstream Charter",Cambria,Georgia,serif}
*,*::before,*::after{box-sizing:border-box}
html{background:#000;scroll-behavior:smooth}
body{margin:0;padding:28px;background:#000;color:var(--text-primary);font-family:var(--serif);font-size:1.0625rem;line-height:1.68;overflow-wrap:anywhere;hyphens:auto}
h1,h2,h3,h4{font-family:var(--serif);line-height:1.2;overflow-wrap:anywhere;hyphens:auto;margin:0 0 .6em;font-weight:700}
h1{font-size:clamp(2.1rem,5vw,3.8rem);letter-spacing:-.01em}
h2{font-size:clamp(1.5rem,3vw,2.1rem)}
h3{font-size:1.25rem}
p{margin:0 0 1em}
a{color:var(--text-primary)}
img{display:block;max-width:100%;height:auto}
:focus-visible{outline:2px solid var(--accent-primary);outline-offset:3px}
.frame{border:1px solid var(--silver);background:var(--bg-canvas);min-height:calc(100vh - 56px);position:relative}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.label{font-variant:small-caps;letter-spacing:.12em;color:var(--accent-primary);font-size:1rem;display:inline-block;margin-bottom:.5em}
.muted{color:var(--text-muted)}
.skip{position:absolute;left:-999px;top:0}.skip:focus{left:16px;top:16px;z-index:99;background:var(--accent-primary);color:#fff;padding:8px 12px}
/* header */
.site-header{position:relative;z-index:30;margin:18px;background:var(--bg-surface);border-radius:999px;padding:10px 14px 10px 20px;display:flex;align-items:center;gap:20px;box-shadow:var(--shadow-soft)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;margin-right:auto;font-size:1.08rem}
.mark{width:34px;height:34px;border-radius:50%;background:var(--accent-primary);color:#fff;display:grid;place-items:center;font-size:.8rem;letter-spacing:.05em;font-variant:small-caps}
.nav-list{list-style:none;display:flex;gap:4px;margin:0;padding:0;flex-wrap:nowrap}
.nav-list a{display:block;padding:7px 11px;text-decoration:none;color:var(--text-muted);font-variant:small-caps;letter-spacing:.08em;border-radius:999px;transition:color .3s,background .3s}
.nav-list a:hover,.nav-list a[aria-current=page]{color:#fff;background:rgba(220,38,38,.18)}
.menu-btn{display:none;background:none;border:0;color:var(--text-primary);font-size:1.6rem;width:42px;height:42px;border-radius:50%;cursor:pointer}
.menu-btn:hover{background:var(--bg-surface-hover)}
@media(max-width:1060px){.nav-list a{padding:6px 7px;font-size:.95rem}}
@media(max-width:768px){
.menu-btn{display:block}
.site-header{border-radius:28px}
.nav-list{position:absolute;top:calc(100% + 8px);left:0;right:0;flex-direction:column;background:var(--bg-surface);padding:12px;box-shadow:var(--shadow-elevation);border-top:2px solid var(--accent-primary);opacity:0;transform:translateY(-10px);pointer-events:none;visibility:hidden;transition:all .4s var(--ease-kinetic)}
.nav-list.open{opacity:1;transform:none;pointer-events:auto;visibility:visible}
.nav-list a{padding:12px 14px;font-size:1.05rem;border-radius:0}}
/* buttons */
.btn{display:inline-block;background:var(--accent-primary);color:#fff;border:0;padding:13px 26px;font:inherit;font-weight:700;text-decoration:none;cursor:pointer;transition:transform .35s var(--ease-kinetic),box-shadow .35s var(--ease-kinetic)}
.btn:hover{transform:translateY(-5px) scale(1.015);box-shadow:var(--shadow-elevation),var(--glow-accent)}
.tlink{color:var(--silver);text-decoration:none;background:linear-gradient(var(--silver),var(--silver)) 0 100%/0 1px no-repeat;padding-bottom:2px;transition:background-size .4s var(--ease-kinetic);font:inherit;border:0;background-color:transparent;cursor:pointer}
.tlink:hover,.tlink:focus-visible{background-size:100% 1px}
.actions{display:flex;flex-wrap:wrap;gap:22px;align-items:center;justify-content:center;margin-top:1.4em}
/* hero */
.hero{position:relative;min-height:calc(100vh - 150px);display:grid;place-items:center;text-align:center;margin-top:-80px;padding:130px 24px 70px;isolation:isolate}
.hero>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-3}
.hero::before{content:"";position:absolute;inset:0;z-index:-2;background:linear-gradient(120deg,rgba(11,11,13,.92),rgba(11,11,13,.55),rgba(69,10,10,.75),rgba(11,11,13,.9));background-size:200% 200%;animation:gradientShift 12s ease infinite}
.orb{position:absolute;border-radius:50%;filter:blur(60px);z-index:-1;opacity:.45;animation:float 14s ease-in-out infinite}
.orb.one{width:260px;height:260px;background:var(--accent-primary);top:22%;left:8%}
.orb.two{width:200px;height:200px;background:#7f1d1d;bottom:12%;right:10%;animation-delay:-6s}
.hero-inner{max-width:820px}
.hero p.lede{font-size:1.2rem;color:var(--text-muted);max-width:60ch;margin:0 auto}
@keyframes gradientShift{0%,100%{background-position:0 50%}50%{background-position:100% 50%}}
@keyframes float{0%,100%{transform:translate(0,0)}50%{transform:translate(30px,-26px)}}
.page-hero{display:grid;grid-template-columns:1.1fr 1fr;gap:36px;align-items:center;padding:34px 0 20px}
.page-hero .lede{color:var(--text-muted);font-size:1.15rem}
.banner{aspect-ratio:16/9;width:100%;object-fit:cover;box-shadow:var(--shadow-soft)}
@media(max-width:860px){.page-hero{grid-template-columns:1fr}}
/* sections */
section{padding:56px 0}
.section-head{max-width:68ch;margin-bottom:28px}
.split{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:center}
@media(max-width:860px){.split{grid-template-columns:1fr}}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px}
.panel{background:var(--bg-surface);padding:24px;box-shadow:var(--shadow-soft);transition:transform .45s var(--ease-kinetic),box-shadow .45s var(--ease-kinetic),background .3s}
.panel:hover{transform:translateY(-5px) scale(1.015);box-shadow:var(--shadow-elevation),var(--glow-accent);background:var(--bg-surface-hover)}
.panel.flat:hover{transform:none;box-shadow:var(--shadow-soft)}
.ratio-43{aspect-ratio:4/3;width:100%;object-fit:cover}
.thumb{aspect-ratio:1/1;width:100%;object-fit:cover}
/* stat strip */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));background:var(--bg-surface);box-shadow:var(--shadow-soft)}
.stat{padding:22px 24px;border-left:1px solid var(--border-subtle)}
.stat:first-child{border-left:0}
.stat b{display:block;font-size:2.4rem;color:var(--accent-primary);line-height:1}
.stat span{font-variant:small-caps;letter-spacing:.1em;color:var(--text-muted)}
/* tabs */
.tablist{display:flex;flex-wrap:wrap;gap:0;border-bottom:1px solid var(--border-subtle);margin-bottom:22px}
.tab{background:none;border:0;border-bottom:2px solid transparent;color:var(--text-muted);font:inherit;font-variant:small-caps;letter-spacing:.12em;font-size:1.1rem;padding:10px 20px;cursor:pointer;transition:color .3s,border-color .3s}
.tab[aria-selected=true]{color:#fff;border-bottom-color:var(--accent-primary)}
.tab:hover{color:#fff}
.tabpanel[hidden]{display:none}
.tab-body{display:grid;grid-template-columns:280px 1fr;gap:28px;align-items:start}
@media(max-width:700px){.tab-body{grid-template-columns:1fr}}
/* table */
.table-wrap{overflow-x:auto;box-shadow:var(--shadow-soft)}
table{width:100%;border-collapse:collapse;min-width:680px;background:var(--bg-surface)}
th,td{padding:14px 16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--border-subtle)}
th{font-variant:small-caps;letter-spacing:.1em;color:var(--silver);font-weight:700;background:#121215}
tbody tr:hover{background:var(--bg-surface-hover)}
/* accordion */
.accordion details{background:var(--bg-surface);margin-bottom:10px;box-shadow:var(--shadow-soft)}
.accordion summary{cursor:pointer;padding:16px 50px 16px 20px;font-weight:700;list-style:none;position:relative}
.accordion summary::-webkit-details-marker{display:none}
.accordion summary::after{content:"+";position:absolute;right:16px;top:12px;width:28px;height:28px;border-radius:50%;background:var(--accent-primary);color:#fff;display:grid;place-items:center;transition:transform .4s var(--ease-kinetic)}
.accordion details[open] summary::after{transform:rotate(45deg)}
.accordion .ans{padding:0 20px 18px;color:var(--text-muted);max-width:72ch}
/* chapter layout */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:40px;align-items:start}
.layout aside{position:sticky;top:20px}
@media(max-width:960px){.layout{grid-template-columns:1fr}.layout aside{position:static}}
.prose{max-width:70ch}
.prose h2{margin-top:1.6em}
.prose ul{padding-left:1.2em}.prose li{margin-bottom:.4em}
.steps{list-style:none;padding:0;margin:1.2em 0}
.steps li{display:grid;grid-template-columns:44px 1fr;gap:16px;align-items:start;background:var(--bg-surface);padding:16px;margin-bottom:10px;box-shadow:var(--shadow-soft)}
.badge{width:40px;height:40px;border-radius:50%;background:var(--accent-primary);color:#fff;display:grid;place-items:center;font-weight:700}
.callout{background:linear-gradient(90deg,rgba(220,38,38,.16),var(--bg-surface) 60%);border-left:3px solid var(--accent-primary);padding:18px 22px;margin:1.5em 0}
.callout strong{font-variant:small-caps;letter-spacing:.1em;color:#fca5a5;display:block;margin-bottom:4px}
.qref dl{margin:0}.qref dt{font-variant:small-caps;letter-spacing:.1em;color:var(--accent-primary);margin-top:12px}.qref dd{margin:0;color:var(--text-muted)}
.chip{display:inline-block;border-radius:999px;background:#24242b;color:var(--silver);padding:3px 12px;font-size:.88rem;margin:3px 4px 3px 0}
.author{display:flex;gap:14px;align-items:center;margin-top:18px}
.avatar{width:64px;height:64px;border-radius:50%;object-fit:cover}
.next{display:flex;justify-content:space-between;flex-wrap:wrap;gap:18px;margin-top:40px;padding-top:20px;border-top:1px solid var(--border-subtle)}
/* forms */
.field{display:grid;gap:6px;margin-bottom:16px}
.field label{font-variant:small-caps;letter-spacing:.1em;color:var(--silver)}
input,select,textarea{font:inherit;color:var(--text-primary);background:#0f0f12;border:1px solid var(--border-subtle);padding:11px 12px;width:100%}
input:focus,select:focus,textarea:focus{border-color:var(--accent-primary);outline:none}
textarea{min-height:150px;resize:vertical}
pre.preview{white-space:pre-wrap;background:#0f0f12;padding:18px;font-family:var(--serif);min-height:180px;margin:0 0 18px;border:1px solid var(--border-subtle)}
.status{min-height:1.5em;color:#fca5a5}
/* footer */
.site-footer{margin:40px 18px 18px;border:1px solid var(--silver)}
.foot-row{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:1px;background:var(--border-subtle)}
.fpanel{background:var(--bg-surface);padding:22px}
.fpanel h2{font-size:1rem;font-variant:small-caps;letter-spacing:.12em;color:var(--accent-primary)}
.fpanel ul{list-style:none;margin:0;padding:0}.fpanel li{margin-bottom:6px}
.fpanel p{color:var(--text-muted);font-size:.95rem}
.copy{margin:0;padding:12px 22px;font-variant:small-caps;letter-spacing:.12em;color:var(--silver);font-size:.9rem;border-top:1px solid var(--silver);text-align:left}
@media(max-width:768px){.foot-row{grid-template-columns:1fr}}
/* reveal */
.js .reveal{opacity:0;transform:translateY(28px)}
.js .reveal.reveal-visible{opacity:1;transform:translateY(0);transition:all .7s var(--ease-kinetic)}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.js .reveal{opacity:1;transform:none}}
@media(max-width:480px){body{padding:10px;font-size:1rem}.site-header{margin:10px}.wrap{padding:0 16px}section{padding:40px 0}.stat{border-left:0;border-top:1px solid var(--border-subtle)}}
@media(min-width:481px) and (max-width:768px){body{padding:16px}}
@media(min-width:1025px){.wrap{padding:0 32px}}