*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}
body{margin:0;min-height:100vh;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}
img,svg,video{max-width:100%;height:auto;display:block}
table{border-collapse:collapse}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul[class],ol[class]{list-style:none;margin:0;padding:0}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:3px solid var(--focus,#0b57d0);outline-offset:2px;border-radius:2px}
.pss-skip-link{position:absolute;left:-9999px;top:0;z-index:999;padding:.75rem 1.25rem;background:#111;color:#fff;text-decoration:none}
.pss-skip-link:focus{left:.5rem;top:.5rem}
main:focus{outline:none}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
[hidden]{display:none!important}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}

:root{
  --paper:#FBFAF7;
  --paper-2:#F1EFE9;
  --card:#FFFFFF;
  --graphite:#22252A;
  --graphite-2:#464B53;
  --metal:#7A818C;
  --metal-2:#A8AEB8;
  --rule:#DFDCD4;
  --rule-2:#C7C3B8;
  --moss:#4A6340;
  --moss-dk:#35492D;
  --moss-lt:#EDF1EA;
  --clay:#8A4A2F;
  --amber:#8A6A1F;
  --focus:#4A6340;
  --display:"Helvetica Neue Condensed","Arial Narrow",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  --body:Inter,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --gutter:clamp(1rem,4vw,2.75rem);
  --margin-rail:clamp(0px,calc((100vw - 40rem) * 10),9.5rem);
}
html{font-size:100%}
body{
  background:var(--paper);
  color:var(--graphite);
  font-family:var(--body);
  font-size:clamp(1rem,0.965rem + 0.18vw,1.0625rem);
  line-height:1.65;
}
h1,h2,h3,h4{font-family:var(--display);font-weight:700;letter-spacing:-0.01em;line-height:1.12}
h1{font-size:clamp(1.95rem,1.35rem + 2.6vw,3.1rem);text-wrap:balance}
h2{font-size:clamp(1.35rem,1.1rem + 1.1vw,1.85rem);text-wrap:balance}
h3{font-size:clamp(1.1rem,1rem + 0.5vw,1.3rem)}
h4{font-size:1.02rem;letter-spacing:0}
strong{font-weight:650}
a{color:var(--moss-dk);text-underline-offset:.16em;text-decoration-thickness:from-font}
a:hover{color:var(--graphite)}

/* ---------- Scaffolding ---------- */
.pss-wrap{width:min(100% - (var(--gutter) * 2),74rem);margin-inline:auto}
.pss-wrap--narrow{width:min(100% - (var(--gutter) * 2),48rem);margin-inline:auto}
.pss-section{padding-block:clamp(2.25rem,5vw,3.75rem)}
.pss-section + .pss-section{border-top:1px solid var(--rule)}
.prose > * + *{margin-top:1.05em}
.prose h2{margin-top:2.1em}
.prose h3{margin-top:1.6em}
.prose ul,.prose ol{padding-left:1.25rem}
.prose li + li{margin-top:.45em}
.prose p,.prose li{max-width:68ch}

/* ---------- Masthead: two rows, index-tab nav ---------- */
.pss-masthead{background:var(--paper);border-bottom:1px solid var(--rule-2)}
.pss-masthead__top{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;padding-block:.95rem}
.pss-wordmark{display:inline-flex;align-items:baseline;gap:.45rem;text-decoration:none;color:var(--graphite)}
.pss-wordmark__a{font-family:var(--display);font-weight:700;font-size:1.3rem;letter-spacing:.01em}
.pss-wordmark__b{font-family:var(--display);font-weight:400;font-size:1.3rem;color:var(--moss)}
.pss-masthead__meta{font-family:var(--mono);font-size:.68rem;letter-spacing:.07em;text-transform:uppercase;color:var(--metal);text-align:right}
@media (max-width:34rem){.pss-masthead__meta{display:none}}

.pss-tabs{border-top:1px solid var(--rule)}
.pss-tabs__list{display:flex;flex-wrap:wrap;gap:0}
.pss-tabs__link{
  display:block;padding:.7rem 1rem .62rem;text-decoration:none;color:var(--graphite-2);
  font-family:var(--display);font-size:.94rem;letter-spacing:.02em;
  border-bottom:3px solid transparent;white-space:nowrap;
}
.pss-tabs__link:hover{color:var(--graphite);background:var(--paper-2)}
.pss-tabs__link[aria-current="page"]{color:var(--moss-dk);border-bottom-color:var(--moss);background:var(--moss-lt)}

/* ---------- Nav dropdown groups (<details>: no JS, works on touch) ---------- */
.pss-navgroup{position:relative}
.pss-navgroup summary{
  cursor:pointer;display:block;padding:.7rem 1rem .62rem;color:var(--graphite-2);
  font-family:var(--display);font-size:.94rem;letter-spacing:.02em;
  border-bottom:3px solid transparent;white-space:nowrap;list-style:none;
}
.pss-navgroup summary::-webkit-details-marker{display:none}
.pss-navgroup summary::after{content:"";display:inline-block;margin-left:.35em;width:.4em;height:.4em;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:translateY(-.2em) rotate(45deg)}
.pss-navgroup summary:hover,.pss-navgroup[open] summary,.pss-navgroup summary[aria-current="page"]{color:var(--moss-dk);border-bottom-color:var(--moss);background:var(--moss-lt)}
.pss-navgroup__menu{
  list-style:none;margin:0;padding:.4rem;position:absolute;top:100%;left:0;
  background:var(--paper);border:1px solid var(--rule-2);min-width:11rem;z-index:20;
  box-shadow:0 4px 10px rgba(0,0,0,.08);
}
.pss-navgroup__menu li{margin:0}
.pss-navgroup__menu a{display:block;padding:.5rem .6rem;white-space:nowrap;color:var(--graphite-2);text-decoration:none}
.pss-navgroup__menu a:hover,.pss-navgroup__menu a[aria-current="page"]{color:var(--moss-dk);background:var(--paper-2)}
@media (max-width:34rem){
  .pss-navgroup__menu{position:static;box-shadow:none;border-width:0 0 0 2px;margin-top:.2rem}
}

/* ---------- Breadcrumbs ---------- */
.pss-crumbs{border-bottom:1px solid var(--rule);background:var(--paper-2)}
.pss-crumbs ol{display:flex;flex-wrap:wrap;gap:.3rem .5rem;list-style:none;margin:0;padding:.5rem 0;font-size:.8rem;color:var(--metal)}
.pss-crumbs a{color:var(--graphite-2);text-decoration:none}
.pss-crumbs a:hover{text-decoration:underline}
.pss-crumbs li + li::before{content:"/";margin-right:.5rem;color:var(--metal-2)}
.pss-crumbs [aria-current="page"]{color:var(--graphite)}

/* ---------- Page opening ---------- */
.pss-opening{padding-block:clamp(1.8rem,4vw,3rem) clamp(1.1rem,2vw,1.6rem)}
.pss-opening__tag{
  font-family:var(--mono);font-size:.7rem;letter-spacing:.13em;text-transform:uppercase;
  color:var(--moss);margin-bottom:.7rem;display:block;
}
.pss-opening__lede{margin-top:.9rem;font-size:clamp(1.05rem,1rem + 0.4vw,1.22rem);color:var(--graphite-2);max-width:60ch;line-height:1.55}

/* ---------- Notebook margin rail ---------- */
.pss-leaf{display:grid;grid-template-columns:1fr;gap:0}
@media (min-width:64rem){
  .pss-leaf{grid-template-columns:9.5rem 1fr;column-gap:2.5rem}
  .pss-leaf__rail{
    grid-column:1;font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;
    color:var(--metal);border-right:1px solid var(--rule);padding-right:1rem;padding-top:.4rem;
    position:sticky;top:1rem;align-self:start;
  }
  .pss-leaf__body{grid-column:2;min-width:0}
}
@media (max-width:63.99rem){
  .pss-leaf__rail{
    font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;
    color:var(--moss);border-left:3px solid var(--moss);padding-left:.6rem;margin-bottom:1rem;
  }
}

/* ---------- Direct answer: margin note ---------- */
.answer{
  background:var(--moss-lt);border-left:4px solid var(--moss);
  padding:1.1rem 1.25rem;margin-block:1.5rem;border-radius:0 4px 4px 0;
}
.answer__label{
  display:block;font-family:var(--mono);font-size:.68rem;letter-spacing:.13em;text-transform:uppercase;
  color:var(--moss-dk);margin-bottom:.5rem;
}
.answer p{max-width:64ch}
.answer > p + p{margin-top:.8em}

/* ---------- Signature module: wrenchbench job card ---------- */
.bench{display:grid;gap:1rem}
@media (min-width:52rem){.bench--2{grid-template-columns:repeat(2,1fr)}}
.job{
  background:var(--card);border:1px solid var(--rule-2);border-top:3px solid var(--graphite);
  padding:1.15rem 1.25rem 1.25rem;display:flex;flex-direction:column;gap:.65rem;
}
.job__head{display:flex;align-items:baseline;justify-content:space-between;gap:.75rem;flex-wrap:wrap}
.job__title{font-family:var(--display);font-size:1.12rem;margin:0}
.job__title a{text-decoration:none;color:var(--graphite)}
.job__title a:hover{color:var(--moss-dk);text-decoration:underline}
.job__every{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.05em;color:var(--moss-dk);
  background:var(--moss-lt);padding:.18rem .5rem;border-radius:3px;white-space:nowrap;
}
.job__body p{margin:0;color:var(--graphite-2);font-size:.96rem}
.job__body > * + *{margin-top:.55em}

/* ---------- Signature module: consumables strip ---------- */
.strip{
  display:flex;flex-wrap:wrap;gap:.4rem;padding:.75rem 0 0;margin-top:auto;
  border-top:1px dashed var(--rule-2);
}
.strip__label{
  width:100%;font-family:var(--mono);font-size:.65rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--metal);margin-bottom:.15rem;
}
.chip{
  font-family:var(--mono);font-size:.75rem;border:1px solid var(--rule-2);background:var(--paper);
  padding:.2rem .5rem;border-radius:3px;color:var(--graphite-2);
}
.chip b{color:var(--graphite);font-weight:600}

/* ---------- Signature module: fitment confidence badge ---------- */
.confidence{
  display:flex;gap:.85rem;align-items:flex-start;
  border:1px solid var(--rule-2);border-left:5px solid var(--metal);
  background:var(--card);padding:.95rem 1.1rem;margin-block:1.4rem;
}
.confidence--standard{border-left-color:var(--moss)}
.confidence--model{border-left-color:var(--amber)}
.confidence--verify{border-left-color:var(--clay)}
.confidence__mark{
  flex:0 0 auto;width:2.1rem;height:2.1rem;border-radius:50%;display:grid;place-items:center;
  font-family:var(--mono);font-size:.8rem;font-weight:700;color:var(--card);background:var(--metal);
}
.confidence--standard .confidence__mark{background:var(--moss)}
.confidence--model .confidence__mark{background:var(--amber)}
.confidence--verify .confidence__mark{background:var(--clay)}
.confidence__text{min-width:0}
.confidence__level{
  display:block;font-family:var(--mono);font-size:.68rem;letter-spacing:.11em;text-transform:uppercase;
  color:var(--graphite-2);margin-bottom:.25rem;
}
.confidence__text p{margin:0;font-size:.95rem;color:var(--graphite-2)}

/* ---------- Signature module: two-column ledger ---------- */
.ledger{border-top:2px solid var(--graphite);margin-block:1.5rem}
.ledger__row{display:grid;grid-template-columns:1fr;gap:.15rem .5rem;padding:.8rem 0;border-bottom:1px solid var(--rule)}
@media (min-width:44rem){.ledger__row{grid-template-columns:13rem 1fr;gap:1.5rem}}
.ledger__key{font-family:var(--display);font-size:1rem;color:var(--graphite)}
.ledger__val{color:var(--graphite-2);font-size:.96rem}
.ledger__val > * + *{margin-top:.5em}
.ledger__val .num{font-family:var(--mono);font-size:.92em}

/* ---------- Tables ---------- */
.data-table{width:100%;font-size:.94rem;border-top:2px solid var(--graphite)}
.data-table caption{
  caption-side:top;text-align:left;font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--metal);padding-bottom:.55rem;
}
.data-table th,.data-table td{padding:.62rem .7rem;text-align:left;vertical-align:top;border-bottom:1px solid var(--rule)}
.data-table thead th{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--graphite);background:var(--paper-2);border-bottom:1px solid var(--rule-2);font-weight:600;
}
.data-table tbody th{font-weight:600;color:var(--graphite)}
.data-table .num{font-family:var(--mono);font-size:.88rem;white-space:nowrap}
.data-table tbody tr:nth-child(even){background:#FDFDFB}
@media (max-width:47.99rem){
  .data-table--stack,.data-table--stack thead,.data-table--stack tbody,
  .data-table--stack tr,.data-table--stack th,.data-table--stack td{display:block;width:auto}
  .data-table--stack thead{position:absolute;left:-9999px}
  .data-table--stack tr{border:1px solid var(--rule-2);border-top:3px solid var(--graphite);margin-bottom:.85rem;padding:.4rem .75rem .6rem;background:var(--card)}
  .data-table--stack tbody tr:nth-child(even){background:var(--card)}
  .data-table--stack td,.data-table--stack th{border-bottom:1px solid var(--rule);padding:.5rem 0}
  .data-table--stack tr > *:last-child{border-bottom:0}
  .data-table--stack td::before,.data-table--stack th::before{
    content:attr(data-label);display:block;font-family:var(--mono);font-size:.63rem;
    letter-spacing:.1em;text-transform:uppercase;color:var(--metal);margin-bottom:.15rem;
  }
  .data-table--stack .num{white-space:normal}
}

/* ---------- Figures ---------- */
.figure{margin:1.8rem 0}
.figure__frame{background:var(--card);border:1px solid var(--rule-2);padding:1rem;overflow-x:auto}
.figure__frame svg{width:100%;height:auto;display:block;min-width:20rem}
.figure figcaption{margin-top:.55rem;font-size:.85rem;color:var(--metal);max-width:64ch}
.figure text{font-family:var(--mono);fill:var(--graphite)}
.figure .fig-label{font-size:11px;fill:var(--graphite-2)}
.figure .fig-key{font-size:12px;font-weight:600;fill:var(--graphite)}
.figure .fig-rule{stroke:var(--rule-2);stroke-width:1}
.figure .fig-accent{stroke:var(--moss);stroke-width:2;fill:none}
.figure .fig-ink{stroke:var(--graphite);stroke-width:2;fill:none}
.figure .fig-fill{fill:var(--moss-lt)}

/* ---------- Notes ---------- */
.note{border:1px solid var(--rule-2);background:var(--card);padding:.9rem 1.1rem;margin-block:1.4rem;border-left:4px solid var(--metal)}
.note--caution{border-left-color:var(--amber);background:#FDFAF1}
.note--stop{border-left-color:var(--clay);background:#FCF5F2}
.note__label{display:block;font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--graphite-2);margin-bottom:.35rem}
.note p{margin:0;font-size:.95rem}
.note > p + p{margin-top:.6em}

/* ---------- FAQ ---------- */
.faq{margin-top:2.2rem}
.faq__item{border-bottom:1px solid var(--rule);padding-block:.95rem}
.faq__item:first-of-type{border-top:2px solid var(--graphite)}
.faq__q{font-family:var(--display);font-size:1.05rem;margin:0 0 .4rem}
.faq__a{margin:0;color:var(--graphite-2);font-size:.96rem;max-width:70ch}
.faq__a + .faq__a{margin-top:.55em}

/* ---------- Index list ---------- */
.index-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule)}
.index-list li{border-bottom:1px solid var(--rule)}
.index-list a{display:block;padding:.85rem 0;text-decoration:none;color:var(--graphite)}
.index-list a:hover{background:var(--paper-2)}
.index-list__title{display:block;font-family:var(--display);font-size:1.05rem}
.index-list__desc{display:block;color:var(--graphite-2);font-size:.9rem;margin-top:.15rem;max-width:62ch}

/* ---------- Pathway (next steps) ---------- */
.pathway{margin-top:2.4rem;border-top:2px solid var(--graphite);padding-top:1.1rem}
.pathway h2{font-size:1.15rem;margin:0 0 .7rem}
.pathway ol{list-style:none;margin:0;padding:0;counter-reset:step}
.pathway li{counter-increment:step;display:grid;grid-template-columns:1.9rem 1fr;gap:.75rem;padding-block:.6rem;border-bottom:1px solid var(--rule)}
.pathway li::before{
  content:counter(step);font-family:var(--mono);font-size:.78rem;color:var(--moss-dk);
  background:var(--moss-lt);border-radius:3px;height:1.55rem;display:grid;place-items:center;
}
.pathway a{font-family:var(--display);font-size:1.02rem}
.pathway span{display:block;color:var(--graphite-2);font-size:.9rem;margin-top:.1rem}

/* ---------- Sources ---------- */
.source-list{list-style:none;margin:1rem 0 0;padding:0;font-size:.9rem;color:var(--graphite-2)}
.source-list li{padding:.6rem 0;border-bottom:1px solid var(--rule)}
.source-tag{
  display:inline-block;font-family:var(--mono);font-size:.63rem;letter-spacing:.09em;text-transform:uppercase;
  color:var(--metal);border:1px solid var(--rule-2);padding:.1rem .38rem;border-radius:3px;margin-right:.5rem;
}

/* ---------- Hero (home only) ---------- */
.hero{background:var(--paper-2);border-bottom:1px solid var(--rule-2)}
.hero__inner{padding-block:clamp(2.5rem,6vw,4.25rem)}
.hero__grid{display:grid;gap:2rem}
@media (min-width:60rem){.hero__grid{grid-template-columns:1.15fr .85fr;gap:3.5rem;align-items:start}}
.hero__tag{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--moss);display:block;margin-bottom:.85rem}
.hero__lede{margin-top:1.1rem;font-size:clamp(1.05rem,1rem + 0.45vw,1.25rem);color:var(--graphite-2);max-width:56ch;line-height:1.55}
.hero__free{margin-top:1.1rem;font-family:var(--mono);font-size:.8rem;color:var(--moss-dk)}
.classpick{display:grid;gap:.65rem;background:var(--card);border:1px solid var(--rule-2);padding:1.15rem}
.classpick h2{font-size:1.05rem;margin:0 0 .2rem}
.classpick a{
  display:flex;align-items:baseline;justify-content:space-between;gap:.75rem;
  text-decoration:none;color:var(--graphite);border:1px solid var(--rule);padding:.65rem .8rem;
}
.classpick a:hover{border-color:var(--moss);background:var(--moss-lt)}
.classpick a b{font-family:var(--display);font-size:1.02rem}
.classpick a span{font-family:var(--mono);font-size:.7rem;color:var(--metal);text-align:right}

/* ---------- Tool form ---------- */
.tool-form{background:var(--card);border:1px solid var(--rule-2);border-top:3px solid var(--moss);padding:1.25rem;margin-block:1.6rem}
.tool-form__fields{display:grid;gap:1rem}
@media (min-width:40rem){.tool-form__fields{grid-template-columns:repeat(2,1fr)}}
.field__label{display:block;font-family:var(--display);font-size:.95rem;margin-bottom:.3rem}
.field__unit{font-family:var(--mono);font-size:.75rem;color:var(--metal);font-weight:400}
.tool-form input,.tool-form select{
  width:100%;padding:.55rem .65rem;border:1px solid var(--rule-2);background:var(--paper);
  font-size:1rem;border-radius:3px;
}
.tool-form input:focus,.tool-form select:focus{border-color:var(--moss)}
.field__help{font-size:.82rem;color:var(--metal);margin-top:.3rem}
.field__error{font-size:.85rem;color:var(--clay);margin-top:.3rem;font-weight:600}
.tool-form__actions{display:flex;gap:.7rem;margin-top:1.15rem;flex-wrap:wrap}
.tool-form__submit,.tool-form__reset{
  font-family:var(--display);font-size:1rem;padding:.6rem 1.4rem;border-radius:3px;cursor:pointer;
  border:1px solid var(--moss-dk);
}
.tool-form__submit{background:var(--moss-dk);color:#fff}
.tool-form__submit:hover{background:var(--graphite);border-color:var(--graphite)}
.tool-form__reset{background:transparent;color:var(--graphite-2);border-color:var(--rule-2)}
.tool-form__reset:hover{border-color:var(--graphite)}
.tool-form__errors{margin-top:1rem;padding:.75rem 1rem;background:#FCF5F2;border-left:4px solid var(--clay);font-size:.92rem}
.tool-form__errors-title{font-weight:650;margin:0 0 .4rem}
.tool-form__errors ul{margin:0;padding-left:1.1rem}
.tool-form__result{display:block;margin-top:1.15rem;border-top:2px solid var(--graphite);padding-top:1rem}
.result__headline{font-family:var(--display);font-size:clamp(1.25rem,1.05rem + 1vw,1.75rem);color:var(--graphite);margin:0 0 .85rem;text-wrap:balance}
.result__rows{border-top:1px solid var(--rule)}
.result-row{display:grid;grid-template-columns:1fr auto;gap:.15rem .9rem;padding:.5rem 0;border-bottom:1px solid var(--rule);align-items:baseline}
.result-row--key{background:var(--moss-lt);padding-inline:.55rem;margin-inline:-.55rem}
.result-row__label{color:var(--graphite-2);font-size:.94rem}
.result-row__value{font-family:var(--mono);font-size:.95rem;text-align:right;color:var(--graphite);font-weight:600}
.result-row__unit{color:var(--metal);font-weight:400;font-size:.85em}
.result-row__note{grid-column:1 / -1;font-size:.82rem;color:var(--metal)}
.result__flags{margin-top:1rem;display:grid;gap:.6rem}
.result-flag{margin:0;padding:.6rem .8rem;border-left:4px solid var(--metal);background:var(--paper-2);font-size:.9rem}
.result-flag--caution{border-left-color:var(--amber);background:#FDFAF1}
.result-flag--stop{border-left-color:var(--clay);background:#FCF5F2}
.result-flag__badge{display:inline-block;font-family:var(--mono);font-size:.63rem;letter-spacing:.1em;text-transform:uppercase;color:var(--graphite);margin-right:.4rem}
.result__meta{margin-top:1rem;font-family:var(--mono);font-size:.76rem;color:var(--metal)}
.result__copy{background:none;border:1px solid var(--rule-2);border-radius:3px;padding:.15rem .5rem;cursor:pointer;font-family:var(--mono);font-size:.72rem;color:var(--graphite-2)}
.result__copy:hover{border-color:var(--graphite)}
.tool-form__nojs{font-size:.82rem;color:var(--metal);margin-top:1rem}
.methodology{margin-top:2.4rem;border-top:2px solid var(--graphite);padding-top:1.2rem}
.methodology__block + .methodology__block{margin-top:1.6rem}
.methodology__block h3{font-size:1.08rem;margin-bottom:.45rem}
.methodology__list{padding-left:1.2rem}
.methodology__list li + li{margin-top:.4em}
.methodology__block--stop{border-left:4px solid var(--clay);background:#FCF5F2;padding:.9rem 1.1rem}
.worked-example{border:1px solid var(--rule-2);background:var(--card);padding:.85rem 1rem;margin-top:.8rem;font-size:.93rem}
.worked-example > * + *{margin-top:.45em}
.methodology__version{font-family:var(--mono);font-size:.78rem;color:var(--metal);margin-top:1.4rem}

/* ---------- Footer ---------- */
.site-footer{background:var(--graphite);color:var(--paper-2);margin-top:3rem}
.site-footer a{color:var(--paper-2)}
.footer-grid{display:grid;gap:1.75rem;padding-block:2.5rem}
@media (min-width:44rem){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:64rem){.footer-grid{grid-template-columns:repeat(5,1fr)}}
.footer-grid h2{font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--metal-2);margin-bottom:.65rem}
.footer-grid ul{list-style:none;margin:0;padding:0;font-size:.9rem}
.footer-grid li + li{margin-top:.42rem}
.footer-grid a{text-decoration:none}
.footer-grid a:hover{text-decoration:underline}
.footer-note{border-top:1px solid #3A3E45;padding-block:1.6rem 2.2rem;font-size:.83rem;color:var(--metal-2);max-width:78ch}
.footer-note > p + p{margin-top:.75em}
.site-credit{border-top:1px solid #3A3E45;padding-block:1rem 1.6rem;font-size:.83rem;color:var(--metal-2)}


/* Consolidated model records and their supporting evidence. */
.answer-passage{max-width:72ch}
.references{border-top:1px solid var(--rule);margin-top:2rem;padding-top:1.2rem}
.field{min-width:0}
.glossary-entry{padding-block:.75rem;border-bottom:1px solid var(--rule)}
.compare-brands{margin-top:1.6rem;padding-top:1rem;border-top:1px solid var(--rule)}
.complete-comparison{max-width:100%;break-inside:avoid}
.model-record{margin-top:2rem;padding-top:1rem;border-top:1px solid var(--rule);scroll-margin-top:6rem}
.pss-model-catalog{margin-top:1.8rem;padding-top:1rem;border-top:1px solid var(--rule)}
.pss-model-catalog summary{cursor:pointer;font-weight:650}
.pss-model-catalog ul{display:grid;gap:.6rem;margin-top:.8rem;padding-left:1.2rem}
.model-variant{margin-top:2rem;padding-top:1rem;border-top:1px solid var(--rule);scroll-margin-top:6rem}

/* A compact topic directory replaces the desktop tabs on narrow screens. */
.pss-mobile-menu { display:none; margin:0 auto; padding:.65rem 1rem; max-width:80rem; }
.pss-mobile-menu summary { cursor:pointer; font-weight:700; padding:.5rem 0; }
.pss-mobile-menu ul { list-style:none; margin:0; padding:0; display:grid; gap:.3rem; }
.pss-mobile-menu a { display:block; padding:.55rem .25rem; }
.source-credit-label { font-weight:700; margin-top:1.5rem; }
.pss-leaf { display:block; }
.pss-leaf__rail { margin:0 0 .75rem; }
@media (max-width:700px) {
  .pss-masthead > .pss-tabs { display:none; }
  .pss-mobile-menu { display:block; }
  .table-scroll { max-width:100%; overflow-x:auto; }
}

.pss-model-evidence { margin-top:1.5rem; padding-top:.75rem; border-top:1px solid #c7d4cf; font-size:.95rem; }
.pss-model-evidence li { margin:.4rem 0; }

.pss-topic-directory { margin:1rem 0 1.5rem; }
.pss-topic-directory ul { display:grid; gap:.6rem 1.5rem; grid-template-columns:repeat(auto-fit,minmax(min(100%,17rem),1fr)); padding-left:1.3rem; }

/* Readable restored engineering records and the public bibliography. */
.machine-record { margin: 1rem 0; padding: .75rem; border: 1px solid #8b9aab; }
.machine-record dt { font-weight: 700; padding-bottom: .3rem; }
.machine-record dd { margin-left: 0; line-height: 1.6; overflow-wrap: anywhere; }
.reference-documents { padding-left: 1.5rem; line-height: 1.6; }