:root{--bg:#110b1d;--paper:#1a1230;--paper2:#22183d;--plate:#0b0715;--rule:rgba(185,156,255,.24);--rule2:rgba(185,156,255,.5);
--ink:#ece6f7;--mut:#b6abd0;--lilac:#b99cff;--lilac2:#d5c4ff;--on:#160d2b;--ivory:#f4efe4;--ivink:#1c1330;--ivmut:#574c6e;--deep:#3d1f8f;
--disp:"Noto Serif Display",Didot,"Bodoni MT",Georgia,serif;--text:Literata,Georgia,"Times New Roman",serif;--mono:"Xanh Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
--side:282px}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.68 var(--text);font-optical-sizing:auto;overflow-x:hidden;
counter-reset:pgl 0 pgr 1 sec 0}
[hidden]{display:none!important}
img,svg{max-width:100%}
a{color:var(--lilac);text-underline-offset:.2em;text-decoration-thickness:1px}
a:hover{color:var(--lilac2)}
:focus-visible{outline:2px solid var(--lilac2);outline-offset:3px}
h1,h2,h3{font-family:var(--disp);font-weight:500;font-stretch:78%;line-height:1.04;margin:0;letter-spacing:-.005em;text-wrap:balance}
p{margin:0 0 1em}
ol,ul{margin:0;padding:0;list-style:none}
code,pre,kbd{font-family:var(--mono)}
.skip{position:absolute;left:12px;top:-80px;z-index:100;background:var(--lilac);color:var(--on);padding:12px 18px;font-weight:600}
.skip:focus{top:12px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.6em;min-height:48px;padding:10px 22px;border:0;border-radius:0;cursor:pointer;
background:var(--lilac);color:var(--on);font:600 16px/1.2 var(--text);text-decoration:none;text-align:center;
box-shadow:inset 0 0 0 1px var(--lilac),inset 0 0 0 4px var(--lilac),inset 0 0 0 5px rgba(22,13,43,.55);transition:background .15s,transform .15s}
.btn:hover{background:var(--lilac2);color:var(--on)}
.btn:active{transform:translateY(1px)}
a.btn::after{content:"\2192";font-family:var(--text);font-weight:400}
.btn.dark{background:var(--on);color:var(--ivory);box-shadow:inset 0 0 0 4px var(--on),inset 0 0 0 5px rgba(244,239,228,.5)}
.btn.dark:hover{background:#2a1a52;color:#fff}
.more{display:inline-flex;align-items:center;min-height:44px;font:italic 400 17px var(--text);color:var(--ink);text-decoration:underline;text-decoration-color:var(--rule2)}
.more:hover{color:var(--lilac2)}
.kicker,.label,.toc-h,.sc-h{font:400 12.5px/1.4 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--lilac);margin:0 0 18px}
.kicker code{letter-spacing:.04em;text-transform:none;font-size:13.5px;overflow-wrap:anywhere}

/* spine sidebar / top bar */
.spine{position:sticky;top:0;z-index:50;background:var(--bg);border-top:5px solid var(--lilac);border-bottom:1px solid var(--rule)}
.edge{display:none}
.spine-in{display:flex;align-items:center;gap:10px;padding:8px 16px;position:relative}
.logo{display:inline-flex;align-items:center;gap:9px;color:var(--ink);text-decoration:none;margin-right:auto;min-height:44px}
.mark{flex:none}
.m1{fill:var(--lilac)}.m2{fill:var(--ivory)}.m3{stroke:var(--lilac);stroke-width:1.4;fill:none}
.logo-t{font:500 17px/1 var(--disp);font-stretch:70%;max-width:6.2em;letter-spacing:.01em}
.tag,.ledger,.issue{display:none}
.spine .key{min-height:44px;padding:8px 14px;font-size:15px}
.burger{flex:none;width:46px;height:46px;background:none;border:1px solid var(--rule2);cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px;padding:0}
.burger i{display:block;width:20px;height:1.5px;background:var(--ink);transition:transform .2s}
.burger[aria-expanded=true] i:first-child{transform:translateY(4.25px) rotate(45deg)}
.burger[aria-expanded=true] i:last-child{transform:translateY(-4.25px) rotate(-45deg)}
.nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--bg);border-bottom:1px solid var(--rule2);padding:4px 16px 16px;box-shadow:0 30px 40px rgba(0,0,0,.5)}
.nav.open{display:block}
.nav ol{counter-reset:nv}
.nav li{counter-increment:nv;border-bottom:1px solid var(--rule)}
.nav a{display:flex;align-items:baseline;gap:14px;min-height:50px;padding:12px 0;color:var(--ink);text-decoration:none;font-size:18px}
.nav a::before{content:counter(nv,decimal-leading-zero);font:italic 400 19px/1 var(--disp);color:var(--lilac);min-width:1.6em}
.nav a:hover span{text-decoration:underline;text-decoration-color:var(--lilac)}
.nav a[aria-current]{color:var(--lilac2)}
.nav a[aria-current]::after{content:"";flex:1;align-self:center;height:1px;background:var(--lilac);margin-left:4px}

/* pane */
.pane{padding:0 16px;max-width:1180px;margin:0 auto;min-width:0}
.runhead{display:flex;justify-content:space-between;gap:16px;padding:16px 0 12px;border-bottom:3px double var(--rule2);margin-bottom:22px;
font:400 12px/1.5 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--mut)}
.runhead p{margin:0;min-width:0}
.crumbs{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.crumbs a{color:var(--mut);text-decoration:none;display:inline-block;padding:6px 0}
.crumbs a:hover{color:var(--lilac2)}
.crumbs .sep{margin:0 .7em;color:var(--lilac)}
.rh-r{display:none;text-transform:none;letter-spacing:.02em;white-space:nowrap}
main{display:block;min-width:0}

/* spreads */
.spread{position:relative;background:var(--paper);border:1px solid var(--rule);padding:30px 20px 58px;margin:0 0 26px;overflow:hidden;
counter-increment:pgl 2 pgr 2 sec;box-shadow:0 1px 0 var(--paper2),0 4px 0 -1px var(--paper),0 5px 0 -1px var(--rule)}
.spread>*{position:relative;z-index:1}
.spread>.big{position:absolute;right:-.06em;top:-.2em;font:italic 300 150px/1 var(--disp);font-stretch:70%;color:transparent;-webkit-text-stroke:1px rgba(185,156,255,.2);pointer-events:none;user-select:none}
.big::before{content:counter(sec,decimal-leading-zero)}
.cover>.big,.keysp>.big,.calcsp>.big{display:none}
.pages{display:grid;grid-template-columns:minmax(0,1fr);gap:30px}
.pg{min-width:0}
.sp-h{font-size:clamp(32px,4.6vw,52px);font-weight:400;margin-bottom:26px;padding-bottom:16px;border-bottom:1px solid var(--rule2);max-width:15em}
.folios{position:absolute!important;left:20px;right:20px;bottom:16px;display:flex;justify-content:space-between;gap:12px;
font:400 11px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--mut)}
.folios b{font:italic 500 15px/1 var(--disp);color:var(--lilac);letter-spacing:0}
.fl b{margin-right:12px}.fr b{margin-left:12px}
.fl b::before{content:counter(pgl,decimal-leading-zero)}
.fr b::before{content:counter(pgr,decimal-leading-zero)}
.fr{display:none}

/* cover */
.cover{padding-top:34px}
.cover-h{margin-bottom:26px;padding-bottom:24px;border-bottom:1px solid var(--rule2)}
h1{font-size:clamp(42px,7.4vw,98px);font-weight:400;font-stretch:66%;line-height:.98;overflow-wrap:break-word}
.cover h1::first-line{font-style:italic;color:var(--lilac2)}
.lead{font-size:clamp(18px,1.5vw,21px);line-height:1.55;color:var(--ink);margin-bottom:1.2em}
.cta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;margin:22px 0 26px}
.coverlines{border-top:3px double var(--rule2)}
.coverlines li{position:relative;padding:13px 0 13px 30px;border-bottom:1px solid var(--rule);font-size:16px;line-height:1.5;color:var(--mut)}
.coverlines li::before{content:"";position:absolute;left:2px;top:1.35em;width:16px;height:1px;background:var(--lilac)}
.label{margin-bottom:12px}

/* numbers strip */
.numbers{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));margin:0 0 26px;border-top:3px double var(--rule2);border-bottom:1px solid var(--rule2)}
.numbers div{padding:18px 14px 16px 0;border-bottom:1px solid var(--rule);min-width:0}
.numbers div:nth-child(even){padding-left:16px;border-left:1px solid var(--rule)}
.numbers div:last-child{border-bottom:0}
.numbers div:nth-child(odd):last-child{grid-column:1/-1}
.numbers dd{margin:0 0 6px;font:italic 400 clamp(34px,4vw,50px)/1 var(--disp);font-stretch:72%;color:var(--lilac2);font-variant-numeric:lining-nums}
.numbers dt{font:400 11.5px/1.45 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--mut)}
.rate dd{font-size:clamp(40px,5vw,66px)}

/* item lists */
.items{counter-reset:it}
.items li{counter-increment:it;border-top:1px solid var(--rule);padding-top:16px;min-width:0}
.items h3{font-size:25px;font-weight:500;margin-bottom:8px;display:flex;gap:12px;align-items:baseline}
.items h3::before{content:counter(it,decimal-leading-zero);font:400 12px/1 var(--mono);letter-spacing:.1em;color:var(--lilac);flex:none}
.items p{margin:0;color:var(--mut);font-size:16px;line-height:1.62}
.uc h3{font-style:italic;font-weight:400;font-size:28px}
.uc h3::before{content:"";width:22px;height:1px;background:var(--lilac);align-self:center}

/* pull quote */
.pull{margin:44px 0;padding:34px 0;border-top:1px solid var(--rule2);border-bottom:1px solid var(--rule2);text-align:center;position:relative}
.pull::before,.pull::after{content:"";position:absolute;left:50%;width:46px;height:5px;margin-left:-23px;background:var(--lilac)}
.pull::before{top:-3px}.pull::after{bottom:-3px}
.pull p{margin:0;font:italic 300 clamp(34px,6vw,76px)/1.05 var(--disp);font-stretch:70%;color:var(--ink);text-wrap:balance}

/* steps strip */
.strip{margin:0 0 44px;padding-top:22px;border-top:3px double var(--rule2)}
.strip>h2{font-size:clamp(30px,4vw,46px);font-weight:400;margin-bottom:22px}
.cols3{display:grid;gap:0;counter-reset:st}
.cols3 li{counter-increment:st;padding:20px 0 22px;border-top:1px solid var(--rule);min-width:0;position:relative}
.cols3 li::before{content:counter(st);display:block;font:italic 300 76px/.9 var(--disp);font-stretch:70%;color:transparent;-webkit-text-stroke:1px var(--lilac);margin-bottom:12px}
.cols3 h3{font-size:25px;margin-bottom:8px}
.cols3 p{margin:0;color:var(--mut);font-size:16px}

/* long read */
.longread{display:grid;grid-template-columns:minmax(0,1fr);gap:34px;margin:0 0 44px;padding-top:26px;border-top:3px double var(--rule2)}
.prose{min-width:0;max-width:720px}
.prose>*:first-child{margin-top:0}
.prose h2{font-size:clamp(29px,3.4vw,40px);font-weight:500;margin:1.7em 0 .6em;padding-top:18px;border-top:1px solid var(--rule2);scroll-margin-top:84px}
.prose h3{font-size:25px;margin:1.5em 0 .5em;scroll-margin-top:84px}
.prose p,.prose li{color:#ddd5ee}
.prose strong{color:var(--ink);font-weight:600}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.4em}
.prose ul{list-style:none;padding-left:0}
.prose ul>li{position:relative;padding-left:28px;margin-bottom:.5em}
.prose ul>li::before{content:"";position:absolute;left:2px;top:.84em;width:14px;height:1px;background:var(--lilac)}
.prose ol{list-style:decimal}
.prose ol>li{margin-bottom:.5em;padding-left:.3em}
.prose ol>li::marker{font:italic 500 1.05em var(--disp);color:var(--lilac)}
.prose blockquote{margin:1.6em 0;padding:18px 0;border-top:1px solid var(--rule2);border-bottom:1px solid var(--rule2);font:italic 300 30px/1.2 var(--disp);font-stretch:74%}
.prose :not(pre)>code{font-size:.9em;background:var(--paper2);padding:.12em .4em;border:1px solid var(--rule);overflow-wrap:anywhere}
.prose table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse;margin:1.5em 0;font-size:15.5px;line-height:1.45;border-top:3px double var(--rule2);border-bottom:1px solid var(--rule2)}
.prose th{font:400 11.5px/1.4 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--lilac);text-align:left;padding:12px 18px 12px 0;border-bottom:1px solid var(--rule2);white-space:nowrap}
.prose td{padding:12px 18px 12px 0;border-bottom:1px solid var(--rule);vertical-align:top;color:#ddd5ee;min-width:8em}
.prose tr:last-child td{border-bottom:0}
.dropcap>p:first-of-type::first-letter{float:left;font:400 4.5em/.8 var(--disp);font-stretch:80%;color:var(--lilac);padding:.08em .1em 0 0;margin-right:.04em}
.sidecard{align-self:start;border:1px solid var(--rule2);padding:22px;background:var(--paper);position:relative}
.sidecard::before{content:"";position:absolute;left:-1px;top:-1px;width:54px;height:5px;background:var(--lilac)}
.sc-h{margin-bottom:10px}
.sidecard p{color:var(--mut);font-size:16px}
.sidecard .btn{width:100%}

/* code */
.codebox{border:1px solid var(--rule2);background:var(--plate);min-width:0}
.codetabs{display:flex;border-bottom:1px solid var(--rule);overflow-x:auto}
.codetabs button{flex:none;min-height:44px;padding:8px 18px;background:none;border:0;border-right:1px solid var(--rule);color:var(--mut);cursor:pointer;font:400 13px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase}
.codetabs button:hover{color:var(--ink)}
.codetabs button[aria-selected=true]{background:var(--lilac);color:var(--on)}
.codebox [data-pane]{min-width:0}
pre.code{position:relative;margin:1.5em 0;padding:46px 0 0;background:var(--plate);border:1px solid var(--rule2);max-width:100%;min-width:0;
font:400 14px/1.7 var(--mono);color:#e6defa;tab-size:2;background-image:linear-gradient(var(--rule),var(--rule));background-size:100% 1px;background-position:0 45px;background-repeat:no-repeat}
.codebox pre.code{margin:0;border:0;background-image:none;padding-top:0}
pre.code code{display:block;overflow-x:auto;padding:16px 18px 18px;white-space:pre;font-size:inherit}
.codebox pre.code code{padding-top:50px}
pre.code .k{color:var(--lilac)}
pre.code .s{color:#f0dfb6}
pre.code .c{color:#9a8fb6;font-style:italic}
.copy{position:absolute;top:0;right:0;z-index:1;min-height:45px;min-width:74px;padding:6px 14px;background:var(--plate);border:0;border-left:1px solid var(--rule);color:var(--mut);cursor:pointer;
font:400 12px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase}
.codebox .copy{border-bottom:1px solid var(--rule)}
.copy:hover{color:var(--on);background:var(--lilac)}

/* docs / article grid */
.pagehead{position:relative;padding:14px 0 30px;margin-bottom:8px}
.pagehead h1{font-size:clamp(40px,6vw,82px);max-width:13em}
.pagehead .lead{margin:22px 0 0;max-width:38em;font-size:clamp(18px,1.6vw,22px);font-style:italic;color:var(--mut)}
.docgrid{display:grid;grid-template-columns:minmax(0,1fr);gap:30px;margin:0 0 44px;padding-top:26px;border-top:3px double var(--rule2)}
.toc{align-self:start;min-width:0}
.toc ol{counter-reset:tc;border-top:1px solid var(--rule2)}
.toc li{counter-increment:tc;border-bottom:1px solid var(--rule)}
.toc a{display:flex;gap:12px;align-items:baseline;min-height:44px;padding:10px 0;color:var(--ink);text-decoration:none;font-size:15.5px;line-height:1.35}
.toc a::before{content:counter(tc,decimal-leading-zero);font:italic 400 16px/1 var(--disp);color:var(--lilac);flex:none;min-width:1.5em}
.toc a:hover{color:var(--lilac2)}
.takeaways{margin:0 0 34px;padding:24px 20px;background:var(--paper);border:1px solid var(--rule2);position:relative}
.takeaways::before{content:"";position:absolute;left:-1px;top:-1px;width:54px;height:5px;background:var(--lilac)}
.takeaways h2{font:400 12.5px/1.4 var(--mono);font-stretch:100%;letter-spacing:.14em;text-transform:uppercase;color:var(--lilac);margin-bottom:14px}
.takeaways ol{display:grid;gap:0 44px;counter-reset:tk}
.takeaways li{counter-increment:tk;display:flex;gap:14px;padding:14px 0;border-top:1px solid var(--rule);font:400 19px/1.4 var(--text);min-width:0}
.takeaways li::before{content:counter(tk);font:italic 300 40px/.9 var(--disp);color:var(--lilac);flex:none;min-width:.7em}

/* FAQ */
.faq-h h2{font-size:clamp(34px,4.6vw,58px);font-weight:400;font-style:italic;margin-bottom:14px}
.faq-l{border-bottom:1px solid var(--rule2)}
details{border-top:1px solid var(--rule2)}
summary{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:56px;padding:14px 0;cursor:pointer;list-style:none;
font:500 22px/1.2 var(--disp);font-stretch:80%;color:var(--ink)}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";flex:none;width:30px;height:30px;border:1px solid var(--rule2);display:grid;place-items:center;font:400 20px/1 var(--mono);color:var(--lilac)}
details[open] summary::after{content:"\2212";background:var(--lilac);color:var(--on)}
summary:hover{color:var(--lilac2)}
details p{margin:0 0 20px;color:var(--mut);font-size:16.5px;max-width:42em}

/* back cover CTA */
.backcover{background:var(--lilac);color:var(--on);padding:38px 22px;margin:0 0 30px;display:grid;gap:22px;position:relative;overflow:hidden}
.backcover::before{content:"";position:absolute;inset:8px;border:1px solid rgba(22,13,43,.45);pointer-events:none}
.backcover h2{font-size:clamp(36px,5.4vw,70px);font-weight:400;font-stretch:68%;font-style:italic;margin-bottom:12px}
.backcover p{margin:0;font-size:18px;max-width:34em}
.bc-act{display:flex;flex-wrap:wrap;align-items:center;gap:8px 24px;position:relative}
.backcover .more{color:var(--on);text-decoration-color:rgba(22,13,43,.6)}
.backcover :focus-visible{outline-color:var(--on)}

/* key page */
.keygrid{display:grid;grid-template-columns:minmax(0,1fr);gap:26px}
.keysp h1{font-size:clamp(44px,6vw,84px)}
.keysp .lead{margin:18px 0 0;color:var(--mut)}
.kb{counter-reset:kb;border-bottom:1px solid var(--rule)}
.kb li{counter-increment:kb;display:grid;grid-template-columns:34px minmax(0,1fr);column-gap:8px;padding:14px 0;border-top:1px solid var(--rule)}
.kb li::before{content:counter(kb,decimal-leading-zero);grid-row:1/3;font:400 12px/1 var(--mono);letter-spacing:.08em;color:var(--lilac);padding-top:8px}
.kb h2{font-size:22px;font-weight:500;font-stretch:80%;margin-bottom:4px}
.kb p{margin:0;color:var(--mut);font-size:15.5px;line-height:1.55}

/* tipped-in ivory inserts: signup + calculator */
.form,.calc{background:var(--ivory);color:var(--ivink);position:relative;box-shadow:10px 12px 0 rgba(5,2,12,.55),0 0 0 1px #fff inset}
.form{padding:34px 22px 24px;scroll-margin-top:80px}
.form::before{content:"";position:absolute;left:0;right:0;top:12px;border-top:2px dashed rgba(28,19,48,.4)}
.form::after{content:"";position:absolute;right:22px;top:-9px;width:54px;height:20px;background:rgba(185,156,255,.75);transform:rotate(2deg)}
.form :focus-visible,.calc :focus-visible{outline-color:var(--deep)}
.tabs2{display:flex;gap:0;margin:0 0 20px;border-bottom:2px solid var(--ivink)}
.tabs2 button{flex:1;min-height:48px;padding:8px 10px;background:none;border:0;cursor:pointer;color:var(--ivmut);font:400 13px/1.2 var(--mono);letter-spacing:.1em;text-transform:uppercase}
.tabs2 button[aria-selected=true]{background:var(--ivink);color:var(--ivory)}
.msg:empty{display:none}
.msg{margin:0 0 16px;padding:12px 14px;font-size:15.5px;line-height:1.4;border-left:4px solid var(--deep);background:#e7dff5;color:var(--ivink)}
.msg.err{border-left-color:#a3103f;background:#fbe2ea;color:#7c0b30;font-weight:600}
.row{margin:0 0 16px}
.form label,.calc label{display:block;font:400 12px/1.4 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--ivink);margin-bottom:7px}
.form input,.calc input{display:block;width:100%;min-height:52px;padding:10px 14px;border:1.5px solid var(--ivink);border-radius:0;background:#fffdf8;color:var(--ivink);font:400 18px/1.2 var(--text);appearance:none;-webkit-appearance:none}
.form input:focus,.calc input:focus{outline:3px solid var(--deep);outline-offset:1px;background:#fff}
.note{font-size:14.5px;line-height:1.45;color:var(--ivmut);margin:8px 0 0}
.form .btn{background:var(--deep);color:#fff;box-shadow:inset 0 0 0 4px var(--deep),inset 0 0 0 5px rgba(255,255,255,.5);width:100%;min-height:54px;font-size:17px;margin-top:4px}
.form .btn:hover{background:#2c1470}
.form .btn[disabled]{opacity:.6;cursor:wait}
.form .btn.sm{width:auto;min-height:44px;padding:8px 16px;font-size:15px;margin:0}
.form .btn.ghost{background:transparent;color:var(--ivink);box-shadow:inset 0 0 0 1.5px var(--ivink)}
.form .btn.ghost:hover{background:var(--ivink);color:var(--ivory)}
.keyout{display:none}
.keyout.on{display:block}
.keyout h3{font-size:34px;font-style:italic;font-weight:400;margin-bottom:14px;color:var(--ivink)}
.keybox{display:flex;align-items:stretch;gap:0;background:var(--bg);border:1.5px solid var(--ivink)}
.keybox span{flex:1;min-width:0;padding:14px;font:400 15px/1.5 var(--mono);color:var(--lilac2);overflow-wrap:anywhere;word-break:break-all}
.keybox .btn.sm{flex:none;background:var(--lilac);color:var(--on);box-shadow:none;min-height:52px}
.keyout p{font-size:15.5px;line-height:1.9;margin:14px 0}
.keyout p.note{line-height:1.45;margin:10px 0}
.keyout code{font-size:14px;overflow-wrap:anywhere;word-break:break-all;background:#e9e2d2;padding:.1em .35em}
.mut{color:var(--ivmut)}
.acts{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.calc{display:grid;gap:18px;padding:24px 22px;margin:0 0 22px}
.calc>div{min-width:0}
.calc>div:last-child{border-top:2px solid var(--ivink);padding-top:16px}
.calc>div:last-child label{margin-bottom:2px}
.calc output{display:block;font:italic 400 clamp(52px,7vw,78px)/1 var(--disp);font-stretch:72%;color:var(--deep);overflow-wrap:anywhere}
.sub{color:var(--mut);font-style:italic;font-size:16px;margin:0}
.ex{counter-reset:ex}
.ex li{counter-increment:ex;padding:16px 0 18px;border-top:1px solid var(--rule)}
.ex li:first-child{border-top:0;padding-top:0}
.ex h3{font-size:24px;margin-bottom:8px;display:flex;gap:12px;align-items:baseline}
.ex h3::before{content:counter(ex,upper-roman) ".";font:italic 400 20px/1 var(--disp);color:var(--lilac);flex:none}
.ex p{margin:0;color:var(--mut);font-size:16px}

/* 404 */
.nf{padding:40px 0 60px;overflow:hidden}
.nfnum{display:block;font:italic 300 clamp(120px,26vw,330px)/.8 var(--disp);font-stretch:66%;color:transparent;-webkit-text-stroke:1.5px var(--lilac);margin-bottom:20px}
.nflinks{margin:26px 0 8px;border-top:3px double var(--rule2);max-width:520px}
.nflinks a{display:flex;align-items:center;min-height:48px;border-bottom:1px solid var(--rule);color:var(--ink);text-decoration:none;font-size:18px}
.nflinks a:hover{color:var(--lilac2)}

/* colophon */
.colophon{border-top:3px double var(--rule2);padding:28px 0 40px;display:grid;gap:22px;color:var(--mut);font-size:15px}
.col-b p{margin:8px 0 0;font-style:italic}
.colophon .logo-t{font-size:22px;max-width:none}
.col-l{display:flex;flex-wrap:wrap;gap:0 22px}
.col-l a{display:inline-flex;align-items:center;min-height:44px;color:var(--ink);text-decoration:none;border-bottom:1px solid var(--rule)}
.col-l a:hover{color:var(--lilac2);border-color:var(--lilac)}
.legal-n{margin:0;font:400 12px/1.6 var(--mono);letter-spacing:.04em;max-width:60em}

@media (min-width:560px){
.numbers{grid-template-columns:repeat(5,minmax(0,1fr))}
.numbers div,.numbers div:nth-child(even){padding:20px 14px 18px 16px;border-left:1px solid var(--rule);border-bottom:0}
.numbers div:first-child{border-left:0;padding-left:0}
.numbers div:nth-child(odd):last-child{grid-column:auto}
.takeaways ol{grid-template-columns:1fr 1fr}
.cols3{grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--rule)}
.cols3 li{border-top:0;padding:22px 24px 8px;border-left:1px solid var(--rule)}
.cols3 li:first-child{padding-left:0;border-left:0}
.pane{padding:0 28px}
.spread{padding:40px 36px 64px}
.folios{left:36px;right:36px}
.fr{display:block}
.rh-r{display:block}
.backcover{padding:48px 44px}
.takeaways{padding:28px 32px}
}
@media (min-width:860px){
.longread{grid-template-columns:minmax(0,1fr) 250px;gap:48px}
.sidecard{position:sticky;top:90px}
.docgrid{grid-template-columns:230px minmax(0,1fr);gap:48px}
.toc{position:sticky;top:90px;max-height:calc(100vh - 110px);overflow-y:auto}
.backcover{grid-template-columns:minmax(0,1fr) auto;align-items:end}
.bc-act{flex-direction:column;align-items:flex-start}
.colophon{grid-template-columns:minmax(0,1fr) minmax(0,1.4fr)}
.legal-n{grid-column:1/-1}
}
/* two-page spread with centre gutter fold */
@media (min-width:860px) and (max-width:1079px),(min-width:1240px){
.spread{padding:48px 44px 70px}
.spread::before{content:"";position:absolute;top:0;bottom:0;left:calc(50% - 64px);width:128px;pointer-events:none;
background:linear-gradient(90deg,transparent,rgba(4,2,10,.42) 46%,rgba(4,2,10,.6) 49.6%,rgba(213,196,255,.16) 50%,rgba(4,2,10,.6) 50.4%,rgba(4,2,10,.42) 54%,transparent)}
.spread::after{content:"";position:absolute;top:0;bottom:0;left:calc(50% - 2px);width:4px;pointer-events:none;
background:linear-gradient(#a79cc2,#a79cc2) 50% 22%/3px 24px no-repeat,linear-gradient(#a79cc2,#a79cc2) 50% 78%/3px 24px no-repeat}
.pages{grid-template-columns:minmax(0,1fr) minmax(0,1fr);column-gap:88px;row-gap:34px}
.folios{left:44px;right:44px;bottom:20px}
.spread>.big{font-size:230px}
.sp-h{max-width:calc(50% - 44px);border-bottom:0;padding-bottom:0;margin-bottom:34px}
.pg .sp-h{max-width:none}
.cover-h{border-bottom:0;padding-bottom:6px}
.keygrid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);column-gap:88px;grid-template-areas:"kh kf" "kb kf";align-items:start}
.kh{grid-area:kh}.kf{grid-area:kf}.kb{grid-area:kb}
.faq-h{position:sticky;top:90px;align-self:start}
}
/* fixed spine sidebar */
@media (min-width:1080px){
.spine{position:fixed;left:0;top:0;bottom:0;width:var(--side);border:0;border-right:1px solid var(--rule2);display:flex}
.edge{display:flex;flex:none;width:44px;background:var(--lilac);color:var(--on);writing-mode:vertical-rl;transform:rotate(180deg);
justify-content:space-between;align-items:center;padding:22px 0;font:400 12px/1 var(--mono);letter-spacing:.24em;text-transform:uppercase;white-space:nowrap;overflow:hidden}
.spine-in{flex:1;min-width:0;flex-direction:column;align-items:stretch;gap:0;padding:26px 22px 20px;overflow-y:auto}
.logo{flex-direction:column;align-items:flex-start;gap:14px;margin:0}
.spine .mark{width:42px;height:42px}
.spine .logo-t{font-size:40px;font-weight:400;font-stretch:64%;line-height:.94;max-width:5.2em}
.tag{display:block;order:2;margin:12px 0 0;padding-bottom:18px;font-style:italic;font-size:15px;line-height:1.4;color:var(--mut);border-bottom:3px double var(--rule2)}
.burger{display:none}
.nav{display:block;order:3;position:static;background:none;border:0;padding:0;box-shadow:none}
.nav a{min-height:48px;font-size:17px;padding:11px 0}
.spine .key{order:4;margin:20px 0 0;min-height:52px;font-size:16px}
.ledger{display:block;order:5;margin:22px 0 0;border-top:1px solid var(--rule2)}
.ledger div{display:flex;justify-content:space-between;align-items:baseline;gap:10px;padding:7px 0;border-bottom:1px solid var(--rule)}
.ledger dt{font:400 10.5px/1.3 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--mut);min-width:0}
.ledger dd{margin:0;font:italic 400 19px/1 var(--disp);font-stretch:76%;color:var(--lilac2);white-space:nowrap}
.issue{display:block;order:6;margin:auto 0 0;padding-top:16px;font:400 11px/1 var(--mono);letter-spacing:.14em;color:var(--mut)}
.pane{margin:0 0 0 var(--side);max-width:1240px;padding:0 32px}
.runhead{padding-top:22px}
.prose h2,.prose h3{scroll-margin-top:24px}
.sidecard,.toc,.faq-h{top:24px}
.toc{max-height:calc(100vh - 48px)}
}
@media (min-width:1080px) and (max-height:760px){.ledger{display:none}.spine .logo-t{font-size:32px}}
@media (min-width:1500px){.pane{padding:0 48px}.pages,.keygrid{column-gap:104px}}
@media (max-width:380px){.spine .key{padding:8px 10px;font-size:14px}.spine .key::after{display:none}.spine-in{padding:8px 12px;gap:8px}.pane{padding:0 12px}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}