/* ============================================================
   THE BITCOIN LEGAL COMMONS
   Visual system: high-contrast editorial, full-bleed dark breaks,
   grain, scroll-driven reveals. No cards. No shadows. No gradients.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,300..800&family=Inter+Tight:ital,wght@0,400;0,500;0,600;1,400&family=JetBrains+Mono:wght@400;500&display=swap');

:root{
  --bg:        #f2f0ea;
  --bg-2:      #e8e5dc;
  --void:      #0b0b0c;
  --void-2:    #141416;
  --ink:       #0b0b0c;
  --ink-2:     #4a4841;
  --ink-3:     #8b877c;
  --paper:     #f2f0ea;

  --sig:       #ff6b00;
  --sig-2:     #ffa03d;

  --line:      rgba(11,11,12,.14);
  --line-2:    rgba(11,11,12,.07);
  --line-inv:  rgba(242,240,234,.16);

  --display:'Bricolage Grotesque','Helvetica Neue',sans-serif;
  --body:'Inter Tight','Helvetica Neue',Arial,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,monospace;

  --ease: cubic-bezier(.16,1,.3,1);
  --measure: 33rem;
  --gut: clamp(28px,5vw,88px);
  --edge: env(safe-area-inset-left, 0px);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:90px}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--body);font-size:18px;line-height:1.72;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
::selection{background:var(--sig);color:#fff}

/* ---------- GRAIN ---------- */
body::after{
  content:'';position:fixed;inset:0;z-index:9999;pointer-events:none;opacity:.42;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
  mix-blend-mode:multiply;
}

/* ---------- LAYOUT ---------- */
.wrap{max-width:42rem;margin:0 auto;
  padding-left:calc(var(--gut) + var(--edge));padding-right:calc(var(--gut) + var(--edge))}
.wrap-wide{max-width:78rem;margin:0 auto;
  padding-left:calc(var(--gut) + var(--edge));padding-right:calc(var(--gut) + var(--edge))}

/* ---------- MASTHEAD ---------- */
.masthead{position:sticky;top:0;z-index:70;background:var(--bg);border-bottom:1px solid var(--line)}
.masthead-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;
  max-width:82rem;margin:0 auto;padding:15px var(--gut)}
.brand{font-family:var(--display);font-weight:700;font-size:.98rem;letter-spacing:-.03em;
  color:var(--ink);text-decoration:none;white-space:nowrap;text-transform:uppercase}
.brand span{color:var(--sig)}
.nav-group{display:flex;align-items:center;gap:24px}
.masthead a.back,.masthead .pill{font-family:var(--mono);font-size:.63rem;letter-spacing:.16em;
  text-transform:uppercase;text-decoration:none;color:var(--ink-2);white-space:nowrap;
  background:none;border:0;padding:0;position:relative}
.masthead a.back::after,.masthead .pill::after{content:'';position:absolute;left:0;right:0;bottom:-4px;
  height:1px;background:var(--sig);transform:scaleX(0);transform-origin:right;transition:transform .5s var(--ease)}
.masthead a.back:hover::after,.masthead .pill:hover::after{transform:scaleX(1);transform-origin:left}
.masthead a.back:hover,.masthead .pill:hover{color:var(--ink)}
.masthead .pill{color:var(--ink);font-weight:500}

#progress{position:fixed;top:0;left:0;height:2px;width:0%;background:var(--sig);z-index:100;
  transition:width .1s linear}

/* ---------- SECTION NAV ---------- */
.sitenav{border-bottom:1px solid var(--line);background:var(--bg);overflow-x:auto;scrollbar-width:none}
.sitenav::-webkit-scrollbar{display:none}
.sitenav-inner{display:flex;max-width:82rem;margin:0 auto;padding:0 var(--gut);white-space:nowrap}
.sitenav a{font-family:var(--mono);font-size:.63rem;letter-spacing:.14em;text-transform:uppercase;
  text-decoration:none;color:var(--ink-3);padding:12px 0;margin-right:30px;flex:0 0 auto;position:relative}
.sitenav a::after{content:'';position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--sig);
  transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease)}
.sitenav a:hover{color:var(--ink)}
.sitenav a:hover::after,.sitenav a.current::after{transform:scaleX(1)}
.sitenav a.current{color:var(--ink)}
@media print{.sitenav{display:none}}

/* ---------- TYPE ---------- */
h1{font-family:var(--display);font-weight:700;font-size:clamp(2.1rem,4.6vw,3.5rem);line-height:1.04;
  letter-spacing:-.035em;margin:0 0 .5em;text-align:left;max-width:22ch}
h2{font-family:var(--display);font-weight:700;font-size:clamp(2rem,4.8vw,3.6rem);line-height:1;
  letter-spacing:-.04em;margin:3.4em 0 .6em;text-wrap:balance}
h3{font-family:var(--display);font-weight:600;font-size:1.16rem;line-height:1.22;letter-spacing:-.02em;
  margin:2.2em 0 .55em}
h4{font-family:var(--body);font-weight:600;font-size:.94rem;margin:1.7em 0 .45em;letter-spacing:-.01em}

.eyebrow{font-family:var(--mono);font-size:.63rem;text-transform:uppercase;letter-spacing:.3em;
  color:var(--sig);margin:0 0 26px;font-weight:500}
.lede{font-size:clamp(1.02rem,1.5vw,1.14rem);line-height:1.55;color:var(--ink-2);margin:0 0 20px;
  max-width:34rem;letter-spacing:-.008em}
.meta{font-family:var(--mono);font-size:.68rem;line-height:1.8;color:var(--ink-3);
  border-top:1px solid var(--line);padding-top:16px;margin-top:34px}

a{color:var(--ink);text-decoration:none;background-image:linear-gradient(var(--sig),var(--sig));
  background-size:100% 1px;background-repeat:no-repeat;background-position:0 100%;
  transition:background-size .45s var(--ease),color .25s}
a:hover{color:var(--sig)}
main p a,main li a,.lede a{background-size:100% 1px}
a:focus-visible{outline:2px solid var(--sig);outline-offset:3px}

/* ---------- FULL-BLEED DARK ---------- */
.hero-dark{background:var(--void);color:var(--bg);padding:clamp(110px,22vh,240px) 0 clamp(90px,15vh,170px);
  position:relative;overflow:hidden}
.hero-dark::before{content:'';position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(90deg,var(--line-inv) 1px,transparent 1px);
  background-size:calc(100%/6) 100%;opacity:.5}
.hero-dark>*{position:relative;z-index:1}
.hero-dark h1{color:var(--bg);font-size:clamp(2.6rem,7vw,6rem);line-height:.94;letter-spacing:-.048em;max-width:16ch}
.hero-dark .lede{color:rgba(242,240,234,.62)}
.hero-dark .eyebrow{color:var(--sig-2)}
.hero-dark a{color:var(--bg)}
.hero{padding:clamp(44px,7vh,84px) 0 40px}

/* ---------- BODY ---------- */
main{padding:8px 0 72px}
main p{margin:0 0 1.15em;max-width:var(--measure)}
main ul,main ol{margin:0 0 1.4em;padding-left:1.25em;max-width:var(--measure)}
main li{margin-bottom:.5em}
main li::marker{color:var(--sig)}
strong{font-weight:600}
code{font-family:var(--mono);font-size:.86em;background:var(--bg-2);padding:.1em .34em}

/* ---------- PART OPENER ---------- */
.part{margin:8.5em 0 0;padding-top:3em;border-top:1px solid var(--ink);position:relative}
.part .n{display:block;font-family:var(--mono);font-size:.63rem;font-weight:500;letter-spacing:.28em;
  text-transform:uppercase;color:var(--sig);margin-bottom:1em}
.part h2{margin:0;font-size:clamp(2.4rem,7vw,5.2rem);line-height:.92;letter-spacing:-.052em}
.part .sub{color:var(--ink-2);font-size:1.06rem;margin:.85em 0 0;max-width:34rem;letter-spacing:-.01em}
.part .backtoc{float:right;font-family:var(--mono);font-size:.6rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--ink-3);background:none}
.part .backtoc:hover{color:var(--sig)}
@media(max-width:640px){.part .backtoc{display:none}}

/* ---------- CONTENTS ---------- */
.toc{margin:2.8em 0 4em;border-top:1px solid var(--ink);padding-top:1.8em}
.toc>h2{font-size:1.5rem;margin:0 0 .3em;letter-spacing:-.03em}
.toc>.toc-intro{color:var(--ink-2);margin:0 0 2em;max-width:36rem}
.toc-grid{columns:2;column-gap:3.4rem}
@media(max-width:760px){.toc-grid{columns:1}}
.toc-sec{break-inside:avoid;margin-bottom:1.9em}
.toc-sec>h3{font-family:var(--mono);font-size:.58rem;text-transform:uppercase;letter-spacing:.26em;
  color:var(--sig);margin:0 0 .8em;padding-bottom:.5em;border-bottom:1px solid var(--line);font-weight:500}
.toc-list{list-style:none;margin:0;padding:0;max-width:none}
.toc-link{display:flex;align-items:baseline;gap:.9em;padding:.34em 0;color:var(--ink);
  font-size:.96rem;line-height:1.35;background:none;transition:transform .4s var(--ease),color .25s}
.toc-link:hover{color:var(--sig);transform:translateX(5px)}
.toc-link .num{font-family:var(--mono);font-size:.66rem;color:var(--ink-3);min-width:1.7em;
  text-align:right;flex:0 0 auto}
.toc-link:hover .num{color:var(--sig)}

/* ---------- NOTES ---------- */
.note,.warn,.ex{margin:2.2em 0;padding:1.2em 0 1.2em 1.4em;border-left:2px solid var(--line);
  max-width:var(--measure);background:none;border-radius:0}
.warn{border-left-color:var(--sig)}
.ex{border-left-color:var(--ink)}
.note p,.warn p,.ex p,.note li,.warn li,.ex li{font-size:.96rem}
.note p:last-child,.warn p:last-child,.ex p:last-child,
.note ul:last-child,.warn ul:last-child,.ex ul:last-child,
.note ol:last-child,.warn ol:last-child,.ex ol:last-child{margin-bottom:0}
.note .label,.warn .label,.ex .label{font-family:var(--mono);font-size:.58rem;text-transform:uppercase;
  letter-spacing:.24em;display:block;margin-bottom:.8em;color:var(--ink-3);font-weight:500}
.warn .label{color:var(--sig)}

/* ---------- TERM ---------- */
.term{margin:1.9em 0;padding:0;border:0;background:none;max-width:var(--measure)}
.term .w{font-family:var(--display);font-weight:600;font-size:1.06rem;display:block;
  margin-bottom:.4em;letter-spacing:-.022em}
.term .w::after{content:'';display:block;width:1.5rem;height:2px;background:var(--sig);margin-top:.45em}
.term p{margin:0 0 .8em;font-size:.96rem}
.term p:last-child{margin-bottom:0}
.term ul,.term ol{font-size:.96rem}

/* ---------- QUESTIONS ---------- */
.qgroup{margin:3em 0 0}
.qgroup>.sub{color:var(--ink-2);margin:0 0 1.7em}
.q{border-top:1px solid var(--line);padding:1.7em 0 .4em;margin:0 0 1.7em;max-width:none}
.q-num{font-family:var(--mono);font-size:.6rem;letter-spacing:.22em;color:var(--sig);display:block;
  margin-bottom:.7em;text-transform:uppercase}
.q-ask{font-family:var(--display);font-weight:600;font-size:1.5rem;line-height:1.12;margin:0 0 1.1em;
  letter-spacing:-.03em;max-width:32rem}
.q-split{display:grid;grid-template-columns:1fr 1fr;gap:0 2.6rem}
.q-split>div{padding:.95em 0 0;border-top:2px solid var(--line);font-size:.93rem;line-height:1.55;
  background:none;border-radius:0}
.q-good{border-top-color:var(--ink)}
.q-bad{border-top-color:var(--sig)}
.q-split .tag{font-family:var(--mono);font-size:.56rem;text-transform:uppercase;letter-spacing:.22em;
  display:block;margin-bottom:.7em;font-weight:500}
.q-good .tag{color:var(--ink)}
.q-bad .tag{color:var(--sig)}
.q-split p{margin:0 0 .7em;max-width:none}
@media(max-width:640px){.q-split{grid-template-columns:1fr;gap:1.5em}}

/* ---------- COLUMNS ---------- */
.cols{display:grid;grid-template-columns:1fr 1fr;gap:0 2.8rem;margin:2em 0 2.6em;max-width:none}
@media(max-width:700px){.cols{grid-template-columns:1fr;gap:1.9em}}
.col-box{border:0;border-top:2px solid var(--line);border-radius:0;padding:.95em 0 0;background:none}
.col-yes{border-top-color:var(--ink)}
.col-no{border-top-color:var(--sig)}
.col-box h3{margin:0 0 .75em;font-family:var(--mono);font-size:.62rem;text-transform:uppercase;
  letter-spacing:.2em;font-weight:500}
.col-yes h3{color:var(--ink)}
.col-no h3{color:var(--sig)}
.col-box ul,.col-box p{font-size:.93rem;max-width:none}
.col-box ul{padding-left:1.1em}
.col-box p:last-child{margin-bottom:0}

/* ---------- STEPS ---------- */
.step{display:grid;grid-template-columns:2.8rem 1fr;gap:0 1.3rem;margin-bottom:2em;
  align-items:start;max-width:none}
.step-n{font-family:var(--mono);font-size:.76rem;font-weight:500;color:var(--sig);background:none;
  width:auto;height:auto;border-radius:0;display:block;text-align:right;padding:.35em .95rem 0 0;
  border-right:1px solid var(--line)}
.step h3{margin:0 0 .5em;font-size:1.02rem}
.step p,.step ul{max-width:32rem}
.step p:last-child,.step ul:last-child{margin-bottom:0}
@media(max-width:560px){.step{grid-template-columns:2rem 1fr;gap:0 .8rem}}

/* ---------- TABLES ---------- */
.ftable{width:100%;border-collapse:collapse;margin:2em 0 2.6em;font-size:.89rem;
  font-variant-numeric:tabular-nums}
.ftable th,.ftable td{text-align:left;padding:.75em 1.1em .75em 0;border-bottom:1px solid var(--line-2);
  vertical-align:top}
.ftable th{font-family:var(--mono);font-size:.56rem;text-transform:uppercase;letter-spacing:.18em;
  color:var(--ink-3);border-bottom:1px solid var(--ink);font-weight:500}
.ftable tbody tr{transition:background .3s}
.ftable tbody tr:hover{background:var(--bg-2)}
.tscroll{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* ---------- TRADITIONS ---------- */
.trad{display:grid;grid-template-columns:1fr 1fr;gap:0 2.8rem;margin:2em 0 2.8em;border:0;
  border-radius:0;overflow:visible;max-width:none}
.trad>div{padding:.95em 0 0;background:none;border-top:2px solid var(--ink);border-right:0}
.trad h3{margin:0 0 .85em;font-family:var(--mono);font-size:.62rem;text-transform:uppercase;
  letter-spacing:.2em;font-weight:500;color:var(--sig)}
.trad ul{margin:0;padding-left:1.1em;font-size:.91rem;max-width:none}
.trad li{margin-bottom:.6em}
@media(max-width:700px){.trad{grid-template-columns:1fr;gap:1.9em}}

/* ---------- INDEX ROWS ---------- */
.cat{margin:4.2em 0 0}
.cat>.cat-head{border-top:1px solid var(--ink);padding-top:1.3em;margin-bottom:1.5em}
.cat h2{margin:0 0 .25em;font-size:clamp(1.7rem,3.4vw,2.4rem)}
.cat .sub{color:var(--ink-2);margin:0;max-width:44rem}
.grid{display:block}
.card{display:block;color:var(--ink);border:0;border-top:1px solid var(--line-2);border-radius:0;
  padding:2.1em 0;background:none;max-width:none;position:relative;
  transition:padding-left .6s var(--ease)}
.card::before{content:'';position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--sig);
  transform:scaleY(0);transform-origin:top;transition:transform .55s var(--ease)}
.card:hover{padding-left:1.5em;color:var(--ink);transform:none;box-shadow:none}
.card:hover::before{transform:scaleY(1)}
.card:hover h3{color:var(--sig)}
.card h3{margin:0 0 .3em;font-family:var(--display);font-weight:700;font-size:clamp(1.5rem,2.6vw,2rem);line-height:1.08;
  letter-spacing:-.04em;transition:color .3s}
.card p{margin:.5em 0 0;color:var(--ink-2);font-size:1rem;line-height:1.55;max-width:40rem}
.card .kicker{font-family:var(--mono);font-size:.56rem;letter-spacing:.26em;text-transform:uppercase;
  color:var(--ink-3);display:block;margin-bottom:1em}
.card:hover .kicker{color:var(--sig)}
.card.soon{opacity:.42;pointer-events:none}
.card.feature{border-top:1px solid var(--ink);padding-top:2.4em;padding-bottom:2.4em}
.card.feature h3{font-size:clamp(2.2rem,5.4vw,4.2rem);letter-spacing:-.05em;line-height:.98}
.card.feature p{font-size:1.04rem}
.card.feature .kicker{color:var(--sig)}

/* ---------- GLOSSARY ---------- */
.gloss{margin:2em 0 0}
.gloss-letter{font-family:var(--display);font-weight:800;font-size:clamp(3rem,9vw,6rem);color:var(--ink);
  border-bottom:1px solid var(--ink);padding-bottom:.02em;margin:1.6em 0 .8em;letter-spacing:-.06em;
  position:sticky;top:53px;background:var(--bg);z-index:5;line-height:1}
.gloss dl{margin:0}
.gloss dt{font-family:var(--display);font-weight:600;font-size:1rem;margin:1.6em 0 .25em;
  letter-spacing:-.022em}
.gloss dd{margin:0;font-size:.96rem;line-height:1.58;color:var(--ink-2);max-width:var(--measure)}
.gloss dd strong{color:var(--ink)}
.jump{display:flex;flex-wrap:wrap;margin:1.6em 0 2.4em;padding:.9em 0;border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);background:none;border-radius:0;gap:0}
.jump a{font-family:var(--mono);font-size:.76rem;color:var(--ink-3);padding:.2em .68em;border:0;
  background:none;border-radius:0;transition:color .25s,transform .35s var(--ease)}
.jump a:hover{color:var(--sig);transform:translateY(-2px)}

/* ---------- FILTER ---------- */
.filter{position:relative;margin:1.7em 0 .5em;max-width:32rem}
.filter input{width:100%;font-family:var(--body);font-size:1.02rem;padding:.65em 2.2em .65em 0;
  border:0;border-bottom:1px solid var(--ink);background:none;color:var(--ink);border-radius:0;
  transition:border-color .3s}
.filter input:focus{outline:none;border-bottom-color:var(--sig);box-shadow:none}
.filter input::placeholder{color:var(--ink-3)}
.filter-count{font-family:var(--mono);font-size:.62rem;color:var(--ink-3);letter-spacing:.16em;
  margin:.7em 0 2em;min-height:1.2em;text-transform:uppercase}
.is-hidden{display:none!important}
.noresults{padding:2em 0;color:var(--ink-3);border-top:1px solid var(--line-2);
  border-bottom:1px solid var(--line-2);margin:1.4em 0 2.4em}

/* ---------- TEMPLATES ---------- */
.tpl{border:0;border-top:1px solid var(--ink);border-radius:0;padding:2.8em 0 0;margin:6em 0 0;
  background:none;max-width:none}
.tpl-head{border-bottom:0;padding-bottom:0;margin-bottom:1.3em}
.tpl-head .num{font-family:var(--mono);font-size:.6rem;letter-spacing:.24em;color:var(--sig);
  display:block;margin-bottom:.7em;text-transform:uppercase}
.tpl-head h3{margin:0 0 .4em;font-family:var(--display);font-weight:700;font-size:clamp(1.9rem,4.2vw,2.9rem);
  line-height:1;letter-spacing:-.045em}
.tpl-head p{margin:0;color:var(--ink-2);font-size:1.01rem;max-width:34rem}
.tpl-head .backtoc{float:right;font-family:var(--mono);font-size:.6rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--ink-3);background:none}
.tpl-head .backtoc:hover{color:var(--sig)}
@media(max-width:640px){.tpl-head .backtoc{display:none}}
.tpl pre{background:var(--void);color:#d8d5cc;border:0;border-radius:0;padding:1.6em 1.7em;
  overflow-x:auto;font-family:var(--mono);font-size:.74rem;line-height:1.75;white-space:pre-wrap;
  word-wrap:break-word;margin:0}
.tpl .use{font-size:.94rem;color:var(--ink-2);margin:1.3em 0 0;max-width:var(--measure)}
.tpl .use strong{color:var(--ink)}

/* ---------- CHECKLIST ---------- */
.ck-summary{position:sticky;top:53px;z-index:20;background:var(--bg);border:0;
  border-bottom:1px solid var(--ink);border-radius:0;padding:1em 0 .8em;margin:2em 0 2.4em;box-shadow:none}
.ck-bar{height:2px;background:var(--line-2);border-radius:0;overflow:hidden;margin-bottom:.8em}
.ck-bar span{display:block;height:100%;width:0%;background:var(--sig);transition:width .5s var(--ease)}
.ck-stats{display:flex;flex-wrap:wrap;align-items:baseline;gap:.5em 1.8em;font-family:var(--mono);
  font-size:.63rem;color:var(--ink-3);letter-spacing:.14em;text-transform:uppercase}
.ck-stats strong{color:var(--ink);font-weight:500}
.ck-reset{margin-left:auto;font-family:var(--mono);font-size:.6rem;letter-spacing:.18em;
  text-transform:uppercase;cursor:pointer;background:none;border:0;border-bottom:1px solid var(--line);
  border-radius:0;padding:0 0 2px;color:var(--ink-3)}
.ck-reset:hover{color:var(--sig);border-color:var(--sig)}
.ck-intro{color:var(--ink-2);margin:0 0 1.7em;max-width:42rem}
.cklist{margin:0 0 3em}
.ck{display:grid;grid-template-columns:1.5rem 1fr;gap:0 1rem;align-items:start;background:none;
  border:0;border-top:1px solid var(--line-2);border-radius:0;padding:1.1em 0;margin:0;cursor:pointer;
  max-width:none;transition:padding-left .5s var(--ease)}
.ck:hover{padding-left:.7em}
.ck:hover .ck-title{color:var(--sig)}
.ck input[type=checkbox]{appearance:none;-webkit-appearance:none;width:15px;height:15px;
  margin:.35em 0 0;cursor:pointer;border:1px solid var(--ink-3);border-radius:0;background:none;
  display:grid;place-content:center;flex:0 0 auto;transition:background .25s,border-color .25s}
.ck input[type=checkbox]:checked{background:var(--sig);border-color:var(--sig)}
.ck input[type=checkbox]:checked::after{content:'';width:7px;height:4px;border-left:1.5px solid #fff;
  border-bottom:1.5px solid #fff;transform:rotate(-45deg) translate(1px,-1px)}
.ck input[type=checkbox]:focus-visible{outline:2px solid var(--sig);outline-offset:2px}
.ck-title{display:block;font-family:var(--display);font-weight:600;font-size:1rem;line-height:1.28;
  margin-bottom:.35em;letter-spacing:-.022em;transition:color .3s}
.ck-why{display:block;font-size:.93rem;line-height:1.55;color:var(--ink-2);margin-bottom:.5em;
  max-width:38rem}
.ck-meta{display:block;font-family:var(--mono);font-size:.58rem;letter-spacing:.18em;color:var(--ink-3);
  text-transform:uppercase}
.ck-meta a{color:var(--ink-3);background:none}
.ck-meta a:hover{color:var(--sig)}
.ck.is-done{opacity:.38}
.ck.is-done .ck-title{text-decoration:line-through}

/* ---------- HOME ---------- */
.hero-stats{display:flex;flex-wrap:wrap;gap:2em 0;margin-top:clamp(3em,8vh,5.5em);
  border-top:1px solid var(--line-inv);padding-top:2em}
.hero-stats div,.hero-stats a{flex:1 1 8rem;padding-right:1.6em}
.hero-stats .v{display:block;font-family:var(--display);font-weight:800;font-size:clamp(2.4rem,5vw,3.8rem);
  color:var(--sig-2);line-height:1;letter-spacing:-.055em;font-variant-numeric:tabular-nums}
.hero-stats .k{display:block;font-family:var(--mono);font-size:.55rem;text-transform:uppercase;
  letter-spacing:.24em;color:rgba(242,240,234,.45);margin-top:.7em}

.marquee{overflow:hidden;border-top:1px solid var(--line-inv);border-bottom:1px solid var(--line-inv);
  padding:.75em 0;margin-top:2.6em;position:relative;z-index:1}
.marquee-track{display:flex;gap:2.6rem;width:max-content;animation:slide 46s linear infinite}
.marquee span{font-family:var(--mono);font-size:.62rem;letter-spacing:.24em;text-transform:uppercase;
  color:rgba(242,240,234,.4);white-space:nowrap}
.marquee span::before{content:'/ ';color:var(--sig)}
@keyframes slide{to{transform:translateX(-50%)}}
@media(prefers-reduced-motion:reduce){.marquee-track{animation:none}}

.paths{display:grid;grid-template-columns:repeat(auto-fit,minmax(16rem,1fr));gap:3em 3.4rem;margin:3.4em 0 0}
.path{display:block;color:var(--ink);background:none;border:0;border-top:1px solid var(--ink);
  border-radius:0;padding:1.1em 0 0;transition:transform .5s var(--ease)}
.path:hover{transform:translateY(-5px);box-shadow:none}
.path:hover .a{color:var(--sig)}
.path:hover .go{transform:translateX(6px)}
.path .q{display:block;font-family:var(--mono);font-size:.56rem;letter-spacing:.24em;
  text-transform:uppercase;color:var(--ink-3);margin-bottom:.8em}
.path .a{display:block;font-family:var(--display);font-weight:700;font-size:2rem;line-height:1.02;
  margin-bottom:.5em;letter-spacing:-.045em;transition:color .3s}
.path .d{display:block;font-size:.93rem;color:var(--ink-2);line-height:1.5}
.path .go{display:inline-block;margin-top:.9em;font-family:var(--mono);font-size:.58rem;
  letter-spacing:.2em;text-transform:uppercase;color:var(--sig);transition:transform .45s var(--ease)}

.sec{margin:9em 0 0}
.sec-head{border-top:1px solid var(--ink);padding-top:1.4em;margin-bottom:2.4em}
.sec-head h2{margin:0;font-size:clamp(2.2rem,5.6vw,4rem);letter-spacing:-.045em;line-height:.98}
.sec-head .sub{margin:0;color:var(--ink-2);max-width:44rem}
@media(max-width:560px){.sec-head{grid-template-columns:2.6rem 1fr;gap:0 .9rem}}

.subsec{font-family:var(--mono);font-size:.58rem;text-transform:uppercase;letter-spacing:.28em;
  color:var(--ink-3);font-weight:500;margin:3.4em 0 1.3em;padding-bottom:.7em;border-bottom:1px solid var(--line-2)}
.subsec:first-of-type{margin-top:1.5em}
.deep{background:none;border:0;border-radius:0;padding:0;margin:0 0 2.4em}
.deep h4{font-family:var(--mono);font-size:.56rem;text-transform:uppercase;letter-spacing:.22em;
  color:var(--ink-3);margin:0 0 .8em;font-weight:500}
.chips{display:flex;flex-wrap:wrap;gap:.2em 2.2em}
.chips a{font-size:.97rem;color:var(--ink-2);background:none;border:0;border-radius:0;padding:.25em 0;
  line-height:1.4;transition:color .25s,transform .35s var(--ease)}
.chips a:hover{color:var(--sig);transform:translateY(-2px)}
.chips a .n{font-family:var(--mono);font-size:.64rem;color:var(--ink-3);margin-right:.5em}
.chips a:hover .n{color:var(--sig)}

.siteindex{margin-top:9em;border-top:1px solid var(--ink);padding-top:1.7em}
.siteindex>h2{margin:0 0 .25em}
.siteindex>.sub{color:var(--ink-2);margin:0 0 2.2em}
.idx-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));gap:3em 3.4rem}
.idx-col h3{font-family:var(--mono);font-size:.56rem;text-transform:uppercase;letter-spacing:.22em;
  color:var(--sig);margin:0 0 .9em;padding-bottom:.5em;border-bottom:1px solid var(--line);font-weight:500}
.idx-col ul{list-style:none;margin:0;padding:0;max-width:none}
.idx-col li{margin:0 0 .55em;font-size:.89rem;line-height:1.35}
.idx-col a{color:var(--ink-2);background:none}
.idx-col a:hover{color:var(--sig)}
.idx-col .tag{font-family:var(--mono);font-size:.54rem;color:var(--ink-3);letter-spacing:.14em;
  display:block;margin-top:.1em;text-transform:uppercase}

/* ---------- FOOTER ---------- */
footer{border-top:1px solid var(--ink);background:none;margin-top:8em;padding:3.4em 0 6em}
footer .wrap-wide{display:flex;flex-wrap:wrap;gap:1.5em 2.6em;justify-content:space-between;
  align-items:baseline}
footer p{margin:0 0 .4em;font-size:.89rem;color:var(--ink-2);max-width:34rem}
.pill{font-family:var(--mono);font-size:.63rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink);background:none;border:0;border-radius:0;padding:0;position:relative}
.pill::after{content:'';position:absolute;left:0;right:0;bottom:-4px;height:1px;background:var(--sig)}
.pill:hover{color:var(--sig)}
.disclaimer{font-size:.83rem;color:var(--ink-3);line-height:1.65;border-top:1px solid var(--line);
  padding-top:1.8em;margin-top:6em;max-width:44rem}
.totop{position:fixed;right:var(--gut);bottom:22px;z-index:40;width:auto;height:auto;border-radius:0;
  background:none;color:var(--ink-3);display:none;font-family:var(--mono);font-size:.58rem;
  letter-spacing:.2em;text-transform:uppercase;box-shadow:none;
  border-bottom:1px solid var(--line);padding-bottom:2px}
.totop.show{display:block}
.totop:hover{color:var(--sig);border-color:var(--sig)}

/* ---------- PRINT ---------- */
@media print{
  body::after{display:none}
  :root{--bg:#fff;--bg-2:#fff}
  body{background:#fff;font-size:10.5pt;line-height:1.42}
  .masthead,footer,.pill,.card.soon,#progress,.totop,.jump,.sitenav,.ck-reset,.ck-bar,.marquee{display:none!important}
  .hero,.hero-dark{padding:0 0 14pt;background:#fff!important;color:#000!important}
  .hero-dark::before{display:none}
  .hero-dark h1,.hero-dark .lede,.hero-dark .eyebrow{color:#000!important}
  .hero-stats .v{color:#000!important}
  .hero-stats .k{color:#444!important}
  .wrap,.wrap-wide{max-width:100%;padding:0}
  
  
  a{color:#000;text-decoration:underline}
  a[href^="http"]::after{content:" (" attr(href) ")";font-size:7.5pt;word-break:break-all}
  .q,.ex,.note,.warn,.col-box,.step,.tpl,.term,.ck{page-break-inside:avoid}
  .tpl pre{background:#fff;color:#000;border:.5pt solid #999;font-size:8pt}
  .gloss-letter,.ck-summary{position:static}
  h1,h2,h3{page-break-after:avoid}
  .part,.tpl{page-break-before:always}
}

/* ============================================================
   ACCORDION NAVIGATION
   ============================================================ */
.sitenav{position:sticky;top:53px;z-index:65;overflow:visible}
.sitenav-inner{overflow-x:auto;scrollbar-width:none}
.sitenav-inner::-webkit-scrollbar{display:none}
.nav-top{font-family:var(--mono);font-size:.63rem;letter-spacing:.14em;text-transform:uppercase;
  text-decoration:none;color:var(--ink-3);padding:13px 0;margin-right:30px;flex:0 0 auto;
  background:none;border:0;cursor:pointer;position:relative;display:inline-flex;align-items:center;
  gap:.5em;font-weight:400;transition:color .3s}
.nav-top::after{content:'';position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--sig);
  transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease)}
.nav-top:hover{color:var(--ink)}
.nav-top:hover::after,.nav-top[aria-current]::after,.nav-top[aria-expanded=true]::after{transform:scaleX(1)}
.nav-top[aria-current],.nav-top[aria-expanded=true]{color:var(--ink)}
.caret{width:5px;height:5px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;
  transform:rotate(45deg) translate(-1px,-1px);transition:transform .4s var(--ease);display:inline-block}
.nav-top[aria-expanded=true] .caret{transform:rotate(-135deg) translate(-2px,-2px)}

.navpanel{position:absolute;left:0;right:0;top:100%;background:var(--void);color:var(--bg);
  border-bottom:1px solid var(--void);overflow:hidden;z-index:66}
.navpanel[hidden]{display:none}
.navpanel-inner{max-width:82rem;margin:0 auto;padding:26px var(--gut) 30px;
  display:grid;grid-template-columns:9rem 1fr;gap:0 2.4rem;
  opacity:0;transform:translateY(-10px);transition:opacity .45s var(--ease),transform .55s var(--ease)}
.navpanel.open .navpanel-inner{opacity:1;transform:none}
.navpanel-label{font-family:var(--mono);font-size:.58rem;letter-spacing:.26em;text-transform:uppercase;
  color:var(--sig-2);padding-top:.3em}
.navpanel ul{list-style:none;margin:0;padding:0;max-width:none;
  columns:2;column-gap:2.6rem}
.navpanel li{margin:0 0 .1em;break-inside:avoid}
.navpanel a{display:block;color:rgba(242,240,234,.72);background:none;font-size:.98rem;
  padding:.42em 0;letter-spacing:-.012em;border-bottom:1px solid transparent;
  transition:color .3s,transform .45s var(--ease),padding-left .45s var(--ease)}
.navpanel a:hover{color:var(--bg);transform:none;padding-left:.55em}
.navpanel li:first-child a{color:var(--bg);font-weight:500}
@media(max-width:760px){
  .navpanel-inner{grid-template-columns:1fr;gap:.9em}
  .navpanel ul{columns:1}
}
@media print{.navpanel{display:none}}

/* ============================================================
   ACCORDION NAVIGATION
   ============================================================ */
.sitenav-inner{overflow-x:auto;scrollbar-width:none}
.sitenav-inner::-webkit-scrollbar{display:none}
.nav-top{font-family:var(--mono);font-size:.63rem;letter-spacing:.14em;text-transform:uppercase;
  text-decoration:none;color:var(--ink-3);padding:13px 0;margin-right:30px;flex:0 0 auto;
  background:none;border:0;cursor:pointer;position:relative;display:inline-flex;align-items:center;
  gap:.5em;font-weight:400;transition:color .3s}
.nav-top::after{content:'';position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--sig);
  transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease)}
.nav-top:hover{color:var(--ink)}
.nav-top:hover::after,.nav-top[aria-current]::after,.nav-top[aria-expanded=true]::after{transform:scaleX(1)}
.nav-top[aria-current],.nav-top[aria-expanded=true]{color:var(--ink)}
.caret{width:5px;height:5px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;
  transform:rotate(45deg) translate(-1px,-1px);transition:transform .4s var(--ease);display:inline-block}
.nav-top[aria-expanded=true] .caret{transform:rotate(-135deg) translate(-2px,-2px)}

.navpanel{position:absolute;left:0;right:0;top:100%;background:var(--void);color:var(--bg);
  border-bottom:1px solid var(--void);overflow:hidden;z-index:66}
.navpanel[hidden]{display:none}

.navpanel.open .navpanel-inner{opacity:1;transform:none}
.navpanel-label{font-family:var(--mono);font-size:.58rem;letter-spacing:.26em;text-transform:uppercase;
  color:var(--sig-2);padding-top:.3em}
.navpanel ul{list-style:none;margin:0;padding:0;max-width:none;
  columns:2;column-gap:2.6rem}
.navpanel li{margin:0 0 .1em;break-inside:avoid}
.navpanel a{display:block;color:rgba(242,240,234,.72);background:none;font-size:.98rem;
  padding:.42em 0;letter-spacing:-.012em;border-bottom:1px solid transparent;
  transition:color .3s,transform .45s var(--ease),padding-left .45s var(--ease)}
.navpanel a:hover{color:var(--bg);transform:none;padding-left:.55em}
.navpanel li:first-child a{color:var(--bg);font-weight:500}
@media(max-width:760px){
  .navpanel-inner{grid-template-columns:1fr;gap:.9em}
  .navpanel ul{columns:1}
}
@media print{.navpanel{display:none}}

/* ============================================================
   MOTION — restrained. Opacity only; nothing moves while reading.
   ============================================================ */

.fade{opacity:0;transition:opacity .7s ease}
.fade.in{opacity:1}
@media (prefers-reduced-motion:reduce){.fade,.fade.in{opacity:1;transition:none}}

/* Rules that draw themselves in */
.drawline{position:relative}
.drawline::after{content:'';position:absolute;left:0;top:-1px;height:1px;width:100%;
  background:var(--sig);transform:scaleX(0);transform-origin:left;
  transition:transform 1s var(--ease)}
.drawline.in::after{transform:scaleX(1)}

/* Link arrow travel */
.path .go::after{content:' \2192';display:inline-block;transition:transform .4s var(--ease)}
.path:hover .go::after{transform:translateX(5px)}

/* ============================================================
   REFINEMENT PASS — space, restraint, and one considered flourish
   ============================================================ */

/* Hero occupies the screen. Nothing else competes with it. */
.hero-dark{min-height:88vh;display:flex;flex-direction:column;justify-content:center}
.hero-dark .lede{max-width:32rem;font-size:clamp(1.05rem,1.7vw,1.24rem);color:rgba(242,240,234,.55)}
.hero-dark .eyebrow{margin-bottom:clamp(28px,6vh,56px)}
@media(max-width:640px){.hero-dark{min-height:auto}}

/* The one flourish: an orange hairline that sweeps across the hero on load. */
.hero-dark::after{
  content:'';position:absolute;left:0;bottom:0;height:1px;width:100%;
  background:var(--sig);transform:scaleX(0);transform-origin:left;
  animation:sweep 1.6s cubic-bezier(.16,1,.3,1) .35s forwards}
@keyframes sweep{to{transform:scaleX(1)}}
@media(prefers-reduced-motion:reduce){.hero-dark::after{animation:none;transform:scaleX(1)}}

/* Index rows: the rule travels with the cursor rather than just appearing. */
.card::before{width:1px;background:var(--ink);transition:transform .7s var(--ease)}
.card:hover::before{background:var(--sig)}
.card .kicker{transition:letter-spacing .5s var(--ease),color .3s}
.card:hover .kicker{letter-spacing:.34em}

/* Entry paths: rule above draws in on hover. */
.path{position:relative;border-top-color:var(--line)}
.path::after{content:'';position:absolute;left:0;top:-1px;height:1px;width:100%;
  background:var(--sig);transform:scaleX(0);transform-origin:left;
  transition:transform .65s var(--ease)}
.path:hover::after{transform:scaleX(1)}
.path:hover{transform:none}
.path .d{max-width:22rem}

/* Section openers: label sits above a full-width rule, heading below. */
.sec-head{position:relative}
.sec-head 
/* Quieter marquee: slower, dimmer, no border above. */
.marquee{border-top:0;padding:1.1em 0 0;margin-top:clamp(3em,7vh,5em);opacity:.5}
.marquee-track{animation-duration:82s;gap:3.4rem}
.marquee span::before{content:'\2014\00a0';color:var(--sig);opacity:.6}

/* Reading pages: wider gutters, calmer measure. */
main .wrap p,main .wrap ul,main .wrap ol{max-width:var(--measure)}
.lede{max-width:34rem}

/* Glossary: bigger letters, more air. */
.gloss-letter{margin:2.4em 0 1em;font-size:clamp(3.4rem,11vw,7rem)}
.gloss dt{margin:2em 0 .3em}

/* Templates: more room around the code blocks. */
.tpl pre{padding:2em 2.1em;font-size:.755rem;line-height:1.8}
.tpl-head{margin-bottom:1.8em}

/* Footer breathing. */
footer p{font-size:.86rem}

/* Focus states stay crisp on the dark hero. */
.hero-dark a:focus-visible{outline-color:var(--sig-2)}

/* ============================================================
   MOTION SYSTEM
   Depth, not displacement. Nothing that carries text ever moves.
   Reveals are masks; the page unveils rather than slides.
   ============================================================ */

/* ---- 1. The hero is a fixed plate. The document scrolls over it. ---- */
.hero-dark{position:sticky;top:0;z-index:0}
#sheet{position:relative;z-index:2;background:var(--bg);
  box-shadow:0 -40px 80px -40px rgba(11,11,12,.5)}
#sheet::before{content:'';position:absolute;left:0;right:0;top:-1px;height:1px;background:var(--sig);
  transform:scaleX(0);transform-origin:left;transition:transform 1.4s var(--ease) .2s}
#sheet.lifted::before{transform:scaleX(1)}
@media(max-width:760px){
  .hero-dark{position:relative}
  #sheet{box-shadow:none}
}

/* ---- 2. Mask reveal. The element is unveiled in place. ---- */
.rv{opacity:0;transition:opacity .75s ease}
.rv.in{opacity:1}
/* Failsafe: if scripting stops for any reason, nothing stays hidden. */
.no-js .rv,.rv.in{opacity:1}

/* ---- 3. Rules that draw ---- */
.drawline{position:relative}
.drawline::after{content:'';position:absolute;left:0;top:-1px;height:1px;width:100%;
  background:var(--sig);transform:scaleX(0);transform-origin:left;
  transition:transform 1.1s var(--ease)}
.drawline.in::after{transform:scaleX(1)}

/* ---- 4. Section headers pin, then are displaced by the next ---- */
.sec-head{position:sticky;top:96px;z-index:6;background:var(--bg);
  padding-bottom:1.1em;margin-bottom:2.2em}
@media(max-width:760px){.sec-head{position:static}}

/* ---- 5. The spine: a fixed rail marking progress through the document ---- */
#spine{position:fixed;left:calc(var(--gut) / 2);top:22vh;bottom:14vh;width:1px;
  background:var(--line-2);z-index:30;display:none}
#spine .fill{position:absolute;left:0;top:0;width:1px;height:0;background:var(--sig);
  transition:height .12s linear}
#spine .tick{position:absolute;left:-3px;width:7px;height:1px;background:var(--line);
  transition:background .4s,transform .4s var(--ease)}
#spine .tick.past{background:var(--sig)}
#spine .tick.here{transform:scaleX(2.6);background:var(--sig)}
#spine .cap{position:absolute;left:0;bottom:-2.2em;font-family:var(--mono);font-size:.54rem;
  letter-spacing:.22em;text-transform:uppercase;color:var(--ink-3);white-space:nowrap;
  writing-mode:vertical-rl;transform:rotate(180deg);bottom:auto;top:0}
@media(min-width:1180px){#spine{display:block}}
@media print{#spine{display:none}}

/* ---- 6. Row interactions: a line traverses the row ---- */
.card{overflow:hidden}
.card::after{content:'';position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--sig);
  transform:scaleX(0);transform-origin:left;transition:transform .8s var(--ease)}
.card:hover::after{transform:scaleX(1)}
.card::before{transition:transform .8s var(--ease)}

/* ---- 7. Numerals in the hero settle into place ---- */
.hero-stats .v{font-variant-numeric:tabular-nums lining-nums}

/* ---- 8. Nav panel: unveils downward rather than fading in ---- */
.navpanel{clip-path:inset(0 0 100% 0);transition:clip-path .5s var(--ease)}
.navpanel.open{clip-path:inset(0 0 0 0)}
.navpanel-inner{opacity:1;transform:none;transition:none}

/* ---- 9. Reduced motion: everything resolves instantly ---- */
@media (prefers-reduced-motion:reduce){
  .hero-dark{position:relative}
  .rv,.rv.in{clip-path:none;opacity:1;transition:none}
  .drawline::after{transform:scaleX(1)}
  #sheet::before{transform:scaleX(1)}
  .sec-head{position:static}
  #spine{display:none}
  .navpanel{clip-path:none}
}

/* ---- Content pages keep a static opening block. The depth effect is
       reserved for the home page, where there is a dark plate to reveal. ---- */
#sheet, footer{background:var(--bg)}

/* Sticky offsets must clear masthead (53) + section nav (~44) */
.gloss-letter{top:98px}
.ck-summary{top:98px}

/* ============================================================
   MOBILE
   One column, generous tap targets, no sticky stacking,
   and type that scales down without losing the character.
   ============================================================ */

@media (max-width: 860px) {
  :root{ --gut: 26px; --measure: 100%; }

  body{ font-size:17px; line-height:1.68 }

  /* Header: single row, no wrap, nothing clipped */
  .masthead-inner{ padding:13px var(--gut) }
  .brand{ font-size:.86rem; letter-spacing:-.02em }
  .masthead a.back{ font-size:.6rem }
  #nowreading{ display:none !important }

  /* Section nav scrolls, with a fade to show there is more */
  .sitenav{ position:sticky; top:47px }
  .sitenav-inner{ padding:0 var(--gut); scroll-padding-left:var(--gut) }
  .nav-top{ margin-right:22px; padding:13px 0; font-size:.62rem }
  .sitenav::after{
    content:''; position:absolute; right:0; top:0; bottom:0; width:36px;
    background:linear-gradient(90deg,transparent,var(--bg)); pointer-events:none }

  /* Accordion panels: full width, one column, comfortable rows */
  .navpanel-inner{ grid-template-columns:1fr; gap:.7em; padding:20px var(--gut) 24px }
  .navpanel ul{ columns:1 }
  .navpanel a{ padding:.62em 0; font-size:1rem }
  .navpanel-label{ padding-top:0 }

  /* Hero: shorter, and the plate does not stick */
  .hero-dark{ position:relative; min-height:auto; padding:64px 0 48px }
  .hero-dark::before{ background-size:calc(100%/3) 100% }
  .hero-dark .eyebrow{ margin-bottom:22px }
  .hero-dark .lede{ font-size:1.02rem; max-width:none }
  .hero{ padding:52px 0 36px }
  h1{ font-size:clamp(2.5rem,12vw,4rem); letter-spacing:-.04em; line-height:.94 }

  /* Statistics: two per row rather than a cramped four */
  .hero-stats{ display:grid; grid-template-columns:1fr 1fr; gap:1.6em 1em;
    margin-top:2.4em; padding-top:1.6em }
  .hero-stats div,.hero-stats a{ padding-right:0 }
  .hero-stats .v{ font-size:2.1rem }
  .hero-stats .k{ font-size:.52rem; letter-spacing:.18em }

  /* Sections: nothing sticks, nothing overlaps */
  .sec{ margin:4.4em 0 0 }
  .sec-head{ position:static; padding-top:1.2em; margin-bottom:1.6em }
  .sec-head h2{ font-size:clamp(1.8rem,7.5vw,2.4rem) }
  .subsec{ margin:2.4em 0 1em }

  /* Entry paths become a stacked list */
  .paths{ grid-template-columns:1fr; gap:0 }
  .path{ padding:1.2em 0 1.4em }
  .path .a{ font-size:1.5rem }
  .path .d{ max-width:none }

  /* Index rows: bigger tap target, no hover indent */
  .card{ padding:1.5em 0 }
  .card:hover{ padding-left:0 }
  .card h3{ font-size:1.35rem }
  .card.feature h3{ font-size:1.85rem }
  .card p{ font-size:.96rem }

  .chips{ gap:0 1.3em }
  .chips a{ padding:.5em 0; font-size:.95rem }
  .idx-grid{ gap:2.2em 1.6rem; grid-template-columns:1fr }
  .idx-col li{ margin-bottom:.7em }
  .idx-col a{ display:inline-block; padding:.12em 0 }

  /* Long-form pages */
  .part{ margin:5em 0 0; padding-top:1.8em }
  .part h2{ font-size:clamp(2rem,9vw,3rem) }
  .part .sub{ font-size:1rem }
  .toc{ margin:2em 0 2.6em }
  .toc-grid{ columns:1 }
  .toc-link{ padding:.5em 0 }

  .gloss-letter{ position:sticky; top:88px; font-size:2.6rem; margin:1.6em 0 .7em }
  .gloss dt{ margin:1.5em 0 .3em }
  .jump a{ padding:.42em .6em }

  .tpl{ margin:4em 0 0; padding-top:2em }
  .tpl-head h3{ font-size:1.6rem }
  .tpl pre{ padding:1.2em 1.1em; font-size:.68rem; line-height:1.7 }

  /* Paired blocks stack rather than squeeze */
  .cols,.trad,.q-split{ grid-template-columns:1fr; gap:1.6em }
  .trad>div{ border-top:2px solid var(--ink) }
  .q-ask{ font-size:1.22rem }
  .step{ grid-template-columns:1.9rem 1fr; gap:0 .8rem }
  .step-n{ padding-right:.7rem }

  /* Tables scroll, with an edge fade so it is obvious */
  .tscroll{ position:relative }
  .ftable{ font-size:.84rem }
  .ftable th,.ftable td{ padding:.6em .8em .6em 0 }

  .filter input{ font-size:16px }   /* 16px prevents iOS zoom on focus */

  .totop{ right:var(--gut); bottom:16px }
  footer{ margin-top:5em; padding:2.4em 0 3.4em }
  footer .wrap-wide{ gap:1.4em }
  .disclaimer{ margin-top:3.4em }
}

@media (max-width: 420px) {
  :root{ --gut: 22px }
  h1{ font-size:2.3rem }
  .hero-stats{ grid-template-columns:1fr 1fr }
  .card.feature h3{ font-size:1.6rem }
  .tpl pre{ font-size:.63rem }
}

/* Touch devices: real tap targets, and no hover-only affordances */
@media (hover: none) {
  .nav-top{ min-height:44px }
  .navpanel a{ min-height:44px; display:flex; align-items:center }
  .toc-link{ min-height:40px; align-items:center }
  .chips a,.jump a{ display:inline-flex; align-items:center; min-height:40px }
  .idx-col li{ margin-bottom:.9em }
  .idx-col a{ display:inline-block; padding:.3em 0 }
  /* hover-driven lines never fire on touch, so remove them */
  .card::after,.card::before,.path::after{ display:none }
  .card:hover,.ck:hover{ padding-left:0 }
}

/* Standing notice on every template */
.skel{font-family:var(--mono);font-size:.62rem;letter-spacing:.1em;line-height:1.7;
  color:var(--ink-3);text-transform:uppercase;margin:0 0 1.4em;padding:.7em 0;
  border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2);max-width:none}
.skel span{color:var(--sig);font-weight:500;margin-right:.7em}

/* Mobile header: keep it to one compact row, never two */
@media (max-width: 860px) {
  .masthead{ padding:0 }
  .masthead-inner{ align-items:center }
  .brand span{ display:inline }
  .part .backtoc,.tpl-head .backtoc{ display:none }
  /* the opening block of a content page must not crowd the sticky bars */
  .hero{ padding-top:34px }
  .hero .eyebrow{ margin-bottom:14px }
  .hero .meta{ margin-top:22px; padding-top:12px }
  h1{ margin-bottom:.45em }
  /* anchors land below both sticky bars */
  html{ scroll-padding-top:104px }
}
@media (max-width: 520px) {
  .brand{ font-size:.78rem }
  .masthead a.back{ font-size:.55rem; letter-spacing:.1em }
}

/* ============================================================
   EDGE SAFETY
   No element may sit against the viewport edge on any screen.
   ============================================================ */
html,body{ max-width:100%; overflow-x:hidden }
.masthead-inner,.sitenav-inner,.navpanel-inner{
  padding-left:calc(var(--gut) + var(--edge));
  padding-right:calc(var(--gut) + var(--edge));
}
.totop{ right:calc(var(--gut) + var(--edge)) }

/* Anything that scrolls sideways keeps its own inner padding */
.tscroll,.sitenav-inner{ scroll-padding-left:var(--gut) }
.tscroll > .ftable{ min-width:32rem }

/* Long unbroken strings (addresses, paths) must wrap rather than overflow */
main p,main li,.gloss dd,.card p,.path .d,.term p,.ck-why{ overflow-wrap:break-word }
code{ overflow-wrap:anywhere }

@media (max-width: 860px) {
  /* generous, consistent breathing room on every block */
  .hero,.hero-dark,main,footer{ padding-left:0; padding-right:0 }
  .note,.warn,.ex{ padding-left:1.1em; margin-left:0 }
  .step{ grid-template-columns:1.8rem 1fr }
  .tpl pre{ margin-left:0; margin-right:0 }
  .marquee{ padding-left:calc(var(--gut) + var(--edge)) }
}

/* ============================================================
   GLOSSARY AT SCALE
   ============================================================ */
.jump{ position:sticky; top:97px; z-index:8; background:var(--bg);
  padding:.7em 0; margin:1.4em 0 2em }
.jump a{ font-variant-numeric:tabular-nums }
.gloss-letter{ scroll-margin-top:150px }
.gloss dt{ scroll-margin-top:150px }

@media (max-width: 860px) {
  .jump{ top:88px; padding:.55em 0; margin:1.1em 0 1.5em }
  .jump a{ padding:.35em .5em; font-size:.8rem; min-height:0 }
  .gloss-letter{ top:132px; scroll-margin-top:140px }
}

/* ============================================================
   MOBILE REFINEMENT
   ============================================================ */
@media (max-width: 860px) {
  /* the two sticky bars are the whole chrome; keep them thin and quiet */
  .masthead{ border-bottom:1px solid var(--line) }
  .sitenav{ box-shadow:0 1px 0 var(--line-2) }

  /* nav panel opens as a sheet from under the bar */
  .navpanel{ max-height:72vh; overflow-y:auto; -webkit-overflow-scrolling:touch }
  .navpanel a{ border-bottom:1px solid rgba(242,240,234,.08) }
  .navpanel li:last-child a{ border-bottom:0 }

  /* reading rhythm */
  main p,main li{ font-size:1.02rem; line-height:1.7 }
  h2{ margin:2.4em 0 .5em }
  h3{ margin:1.9em 0 .5em }
  .note,.warn,.ex{ margin:1.8em 0 }
  .term{ margin:1.7em 0 }

  /* code blocks scroll cleanly instead of squeezing */
  .tpl pre{ white-space:pre; overflow-x:auto; -webkit-overflow-scrolling:touch }

  /* nothing overlaps an anchor target */
  .part,.tpl,.sec{ scroll-margin-top:104px }
}

/* Hero statistics are links to what they count, so each figure is checkable */
.hero-stats a{ background:none; color:inherit; display:block; padding-right:1.6em;
  transition:opacity .35s ease }
.hero-stats a:hover{ opacity:.62 }
.hero-stats a:hover .v{ color:var(--sig-2) }
@media (max-width:860px){ .hero-stats a{ padding-right:0 } }