/* The Lab kit: the one stylesheet every lesson page shares (lab/FORMAT.md is the contract).
   A lesson's own style.css holds only the classes its pictures use. New kit parts are named lx-*;
   the plain names below (.visual, .caption, .readout, .value-row ...) are the vocabulary every
   lesson's Clinical values and Explore freely tabs already use, styled here once. */
:root{
  --paper:#f7f7f2;--card:#fff;--ink:#171916;--muted:#53584d;--rule:#babeb3;--panel:#ecefe5;
  --blue:#254dff;--blue-deep:#1a3ad1;--blue-wash:#e4e9ff;--red:#b3261e;--red-wash:#f8e4e1;
  --amber:#a34700;--green:#2c6a2c;--green-wash:#e1efdd;--purple:#6b3fa0;
  --display:Anton,'Arial Narrow','Helvetica Neue Condensed',Impact,sans-serif;
  --text:'Space Grotesk',system-ui,-apple-system,'Segoe UI',sans-serif;
  --gutter:clamp(16px,3.6vw,40px);--top:78px;
  color-scheme:light
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--text);font-size:16px;line-height:1.55}
[hidden]{display:none!important}
a{color:var(--blue);text-underline-offset:3px}
button,input,select{font:inherit;color:inherit}
button{min-height:46px;border:1px solid var(--ink);padding:10px 20px;background:var(--paper);cursor:pointer;border-radius:0}
button:hover{background:#e9ebe2}
button:disabled{opacity:.45;cursor:default}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px}
.visually-hidden,.sr-only{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;top:-80px;left:20px;background:var(--ink);color:#fff;padding:12px;z-index:100}
.skip:focus{top:10px}
main{max-width:1240px;margin:0 auto;padding:36px var(--gutter) 24px}
main,[id],h2,[data-step]{scroll-margin-top:calc(var(--top) + 18px)}

/* ---------- Lesson head: what this lesson is, and the plan ---------- */
.intro{max-width:none}
.eyebrow{font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;margin:0}
.eyebrow a{color:inherit}
h1{font-family:var(--display);font-weight:400;font-size:clamp(44px,6.4vw,88px);line-height:1.02;letter-spacing:-.005em;margin:14px 0 18px;text-transform:uppercase;max-width:15ch}
h1 span{color:var(--blue)}
.lede{font-size:19px;max-width:66ch;margin:0 0 16px}
.note{display:inline-block;border:1px solid var(--ink);padding:4px 10px;font-size:12px;font-weight:600;margin:0}
.lx-plan{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:0;margin:26px 0 0;border:1px solid var(--ink);background:var(--card)}
.lx-plan:empty{display:none}
.lx-plan>div{padding:20px 22px}
.lx-plan>div+div{border-left:1px solid var(--rule)}
.lx-plan h2{font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;margin:0 0 12px;color:var(--muted)}
.lx-plan h2+*{margin-top:0}
.lx-goals{list-style:none;margin:0;padding:0;counter-reset:goal}
.lx-goals li{counter-increment:goal;display:grid;grid-template-columns:30px minmax(0,1fr) auto;gap:10px;align-items:baseline;padding:7px 0;border-top:1px solid var(--panel)}
.lx-goals li:first-child{border-top:0;padding-top:0}
.lx-goals li::before{content:counter(goal);font-family:var(--display);font-size:22px;line-height:1;color:var(--blue)}
.lx-goals .lx-mastery{font-size:12px;font-weight:700;white-space:nowrap;color:var(--muted)}
.lx-goals .lx-mastery.is-full{color:var(--green)}
.lx-facts{margin:0 0 16px;font-size:15px}
.lx-facts b{font-family:var(--display);font-weight:400;font-size:30px;line-height:1;display:block;letter-spacing:.01em}
.lx-builds{margin:0 0 16px;padding:0;list-style:none;font-size:15px}
.lx-builds li{margin:4px 0}
.lx-start{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.lx-start button{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:700}
.lx-start button:hover{background:var(--blue-deep)}
.lx-start small{color:var(--muted);font-size:13px}

/* ---------- Tabs ---------- */
.tabs{display:flex;border-bottom:1px solid var(--ink);margin-top:30px;gap:2px;overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tabs button{border:0;border-bottom:3px solid transparent;padding:12px 16px;background:transparent;font-weight:500;white-space:nowrap;flex:none}
.tabs button:hover{background:#ecede6}
.tabs [aria-selected=true]{border-bottom-color:var(--blue);color:var(--blue);font-weight:700}
.tabs .lx-count{display:inline-block;margin-left:6px;font-size:12px;font-weight:700;color:var(--muted)}
.tabs [aria-selected=true] .lx-count{color:var(--blue)}
[role=tabpanel]{padding-top:24px}

/* ---------- The step rail: every step at a glance, grouped by stage ---------- */
.lx-rail{display:flex;gap:16px;margin:0 0 22px;padding:0;list-style:none}
.lx-rail>li{flex:var(--n) 1 0;min-width:0}
.lx-rail .lx-stage{display:block;font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lx-rail ol{display:flex;gap:3px;margin:0;padding:0;list-style:none}
.lx-rail ol li{flex:1}
.lx-rail button{display:block;width:100%;min-height:0;height:10px;padding:0;border:0;background:var(--rule);position:relative}
.lx-rail button::after{content:'';position:absolute;inset:-10px 0}
.lx-rail button.is-seen{background:var(--ink)}
.lx-rail button[aria-current=step]{background:var(--blue)}
.lx-rail button:hover{background:var(--blue-deep)}

/* ---------- One step: one idea, one picture, one caption ---------- */
h2{font-size:clamp(24px,2.8vw,34px);line-height:1.15;font-weight:600;letter-spacing:-.03em;margin:8px 0 16px}
h2:focus{outline:none}
h2:focus-visible{outline:3px solid var(--blue);outline-offset:5px}
[data-step]{display:grid;grid-template-columns:minmax(0,1fr);grid-template-areas:"eyebrow" "title" "visual" "caption" "check"}
[data-step]>.eyebrow{grid-area:eyebrow;color:var(--muted)}
[data-step]>h2{grid-area:title}
[data-step]>.visual{grid-area:visual}
[data-step]>.caption{grid-area:caption}
[data-step]>.lx-check{grid-area:check}
[data-step] .replay{display:none}
.visual{background:var(--panel);border:1px solid var(--rule);position:relative;overflow:hidden}
.visual svg{display:block;width:100%;height:auto;margin:0 auto}
/* Picture type, in units of a 480-wide picture: the smallest (17) reads at 12 px on a 375 px phone. */
.visual text{font-family:var(--text);fill:var(--ink);font-size:20px;font-weight:500;paint-order:stroke;stroke:var(--panel);stroke-width:5px;stroke-linejoin:round}
.visual text.sm{font-size:18px;font-weight:500}
.visual text.xs{font-size:17px;font-weight:500}
.visual text.lg{font-size:24px;font-weight:700}
.visual text.b{font-weight:700}
.visual text.blue{fill:var(--blue)}
.visual text.red{fill:var(--red)}
.visual text.amber{fill:var(--amber)}
.visual text.green{fill:var(--green)}
.visual text.purple{fill:var(--purple)}
.visual text.muted{fill:var(--muted)}
.visual text.on-white{stroke:#fff}
.visual text.in-cell{stroke:none;fill:#fff}
.visual text.end{text-anchor:end}
.ghost{opacity:.7}
/* A term in the caption lights its part of the picture (data-part on both). */
.caption dfn{font-style:normal;font-weight:700}
.caption dfn[data-part]{cursor:help;text-decoration:underline dotted var(--blue) 2px;text-underline-offset:4px}
.caption dfn[data-part].is-lit{background:var(--blue-wash);box-shadow:0 0 0 3px var(--blue-wash)}
.visual.has-lit svg [data-part]{opacity:.22;transition:opacity .18s}
.visual.has-lit svg [data-part].is-lit{opacity:1}
.caption{font-size:18px;max-width:62ch;margin:16px 0}
.readout{list-style:none;margin:0;padding:10px 12px;display:flex;flex-wrap:wrap;gap:6px 16px;border-top:1px solid var(--rule);background:var(--paper);font-size:14px}
.readout .head{flex-basis:100%;font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.readout b{font-weight:600}
.readout .up,.readout .down{color:var(--blue);font-weight:700}
.readout .same{color:var(--muted)}

/* The player under every moving picture: play, pause, scrub, slow down, replay. */
.lx-player{display:flex;align-items:center;gap:8px;padding:8px 10px;border-top:1px solid var(--rule);background:var(--paper)}
.lx-player button{min-height:40px;min-width:44px;padding:6px 10px;font-size:14px;font-weight:700;background:var(--card)}
.lx-player button[aria-pressed=true]{background:var(--ink);color:#fff;border-color:var(--ink)}
.lx-player input[type=range]{flex:1;min-width:60px;min-height:40px;margin:0;accent-color:var(--blue)}
.lx-player .lx-when{font-size:12px;font-weight:700;color:var(--muted);min-width:5.5em;text-align:right;white-space:nowrap}

/* Predict first: a question before a change plays. */
.lx-check{border:1px solid var(--ink);border-left:6px solid var(--blue);background:var(--card);padding:16px 18px;margin:16px 0;max-width:62ch}
.lx-check .lx-tag{font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);margin:0 0 6px}
.lx-check .lx-q{font-size:17px;font-weight:600;margin:0 0 12px}
.lx-choices{display:grid;gap:8px;margin:0;padding:0;list-style:none}
.lx-choices button{width:100%;text-align:left;background:var(--paper);border-color:var(--rule);font-weight:500;padding:10px 14px;display:grid;grid-template-columns:24px minmax(0,1fr);gap:10px;align-items:baseline}
.lx-choices button::before{content:attr(data-mark);font-weight:700;color:var(--muted)}
.lx-choices button:hover:not(:disabled){border-color:var(--ink);background:var(--card)}
.lx-choices button:disabled{opacity:1;cursor:default}
.lx-choices button.is-right{border-color:var(--green);background:var(--green-wash);color:var(--ink)}
.lx-choices button.is-right::before{color:var(--green)}
.lx-choices button.is-wrong{border-color:var(--red);background:var(--red-wash);color:var(--ink)}
.lx-choices button.is-wrong::before{color:var(--red)}
.lx-choices button.is-dim{opacity:.55}
.lx-verdict{font-weight:700;margin:12px 0 4px}
.lx-verdict.is-right{color:var(--green)}
.lx-verdict.is-wrong{color:var(--red)}
.lx-why{margin:0 0 4px}
.lx-skip{background:none;border:0;padding:6px 0;min-height:36px;color:var(--blue);text-decoration:underline;text-underline-offset:3px;font-size:14px;margin-top:8px}
.lx-skip:hover{background:none;color:var(--blue-deep)}

/* Step navigation */
.step-nav{display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid var(--rule);padding-top:16px;margin-top:18px}
.step-nav button{min-width:120px;font-weight:600;white-space:nowrap}
@media(max-width:400px){.step-nav{gap:8px}.step-nav button{padding:8px 10px;font-size:15px}[data-step-progress]{font-size:13px}}
.step-nav [data-step-next]{background:var(--blue);color:#fff;border-color:var(--blue)}
.step-nav [data-step-next]:hover{background:var(--blue-deep)}
[data-step-progress]{font-size:14px;font-weight:600;white-space:nowrap;text-align:center}
.hint{font-size:13px;color:var(--muted)}
.lx-done{border:1px solid var(--ink);background:var(--card);padding:18px 20px;margin:18px 0 0;display:flex;flex-wrap:wrap;gap:12px 20px;align-items:center}
.lx-done p{margin:0;font-weight:600;flex:1 1 280px}
.lx-done button{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:700}

/* ---------- Quiz ---------- */
.lx-quiz-head{display:flex;flex-wrap:wrap;gap:8px 24px;align-items:baseline;justify-content:space-between;border-bottom:1px solid var(--ink);padding-bottom:14px;margin-bottom:8px}
.lx-quiz-head h2{margin:0}
.lx-score{font-size:15px;font-weight:700}
.lx-score b{font-family:var(--display);font-weight:400;font-size:30px;color:var(--blue);margin-right:4px}
.lx-qs{list-style:none;margin:0;padding:0;counter-reset:q}
.lx-qs>li{counter-increment:q;border-bottom:1px solid var(--rule);padding:22px 0;display:grid;grid-template-columns:44px minmax(0,1fr);gap:4px 14px}
.lx-qs>li::before{content:counter(q);font-family:var(--display);font-size:30px;line-height:1;color:var(--blue)}
.lx-qs .lx-stem{font-size:17px;font-weight:600;margin:0 0 12px;max-width:70ch}
.lx-qs .lx-meta{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 6px}
.lx-qs .lx-choices{max-width:70ch}
.lx-qs .lx-review{font-size:14px;margin:6px 0 0}
.lx-quiz-foot{display:flex;flex-wrap:wrap;gap:12px;align-items:center;padding-top:18px}
.lx-quiz-foot p{margin:0;flex:1 1 280px;font-weight:600}

/* ---------- Summary ---------- */
.lx-sum{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:28px 40px;align-items:start}
.lx-sum h2{font-size:24px;margin:0 0 12px}
.lx-sum section{padding:0}
.lx-takeaways{margin:0;padding:0;list-style:none;counter-reset:t}
.lx-takeaways li{counter-increment:t;display:grid;grid-template-columns:36px minmax(0,1fr);gap:10px;padding:12px 0;border-top:1px solid var(--rule);font-size:17px}
.lx-takeaways li::before{content:counter(t);font-family:var(--display);font-size:26px;line-height:1.05;color:var(--blue)}
.lx-terms{margin:0}
.lx-terms dt{font-weight:700;margin-top:12px}
.lx-terms dd{margin:2px 0 0;font-size:15px;color:var(--ink)}
.lx-terms dd a{font-size:13px;white-space:nowrap}
.lx-sum .lx-goals li{grid-template-columns:30px minmax(0,1fr) auto}
.lx-next{border:1px solid var(--ink);background:var(--card);padding:16px 18px;margin-top:22px}
.lx-next p{margin:0 0 6px}
.lx-print{margin-top:16px}

/* ---------- Clinical values (shared vocabulary) ---------- */
.disclaimer{font-weight:700;border-left:4px solid var(--red);padding:8px 12px;background:#fff;max-width:760px}
.cv-top{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px;align-items:start;margin:20px 0 8px}
.cv-controls{display:grid;grid-template-columns:minmax(0,1fr);gap:12px}
.cv-controls button{justify-self:start}
label{display:block;font-weight:600}
label output{font-weight:400;color:var(--muted);margin-left:6px}
select{width:100%;min-height:46px;border:1px solid var(--ink);background:var(--paper);padding:8px;margin-top:6px}
input[type=range]{width:100%;accent-color:var(--blue);min-height:44px;margin:4px 0 0}
.state-summary{font-size:16px;min-height:26px;margin:10px 0;max-width:820px}
.model-note,.model-intro{font-size:14px;color:var(--muted);max-width:820px}
.model-note:empty{display:none}
details.lx-fine{max-width:820px;margin:8px 0 14px;border-top:1px solid var(--rule)}
details.lx-fine summary{font-size:14px}
details.lx-fine p{font-size:14px;color:var(--muted)}
.value-row{border-top:1px solid var(--rule);padding:18px 0;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:6px 28px}
.value-row h3{font-size:17px;margin:0}
.value-row .reading{font-size:22px;font-weight:700;color:var(--blue)}
.value-row .status,.value-row .key{font-size:13px}
.value-row .direction{font-size:14px;font-weight:700;color:var(--red);min-height:20px}
.value-row .direction.quiet{color:var(--muted);font-weight:500}
.value-row .citation{grid-column:1/-1;font-size:12px;color:var(--muted)}
.value-row .evidence{grid-column:1/-1;font-size:12px}
.gauge{width:100%;height:46px;display:block}
.gauge .typical{stroke:var(--ink);stroke-width:7}
.gauge .limit{stroke:var(--ink);stroke-width:2}
.gauge .marker{stroke:var(--blue);stroke-width:5}
.gauge .track{stroke:var(--rule);stroke-width:3}
.gauge .band{fill:#d1d8fd}
#sources,.value-row .citation,#state-source{overflow-wrap:anywhere}
#sources{padding-left:20px;font-size:13px}
#sources li{margin:10px 0}
.count-notes{font-size:14px;max-width:820px}
.count-notes li{margin:6px 0}
.load-error{color:var(--red);font-weight:600}

/* ---------- Explore freely (shared vocabulary) ---------- */
.explore-grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:28px;align-items:start}
fieldset{border:0;border-top:1px solid var(--rule);margin:0 0 10px;padding:8px 0 0;min-width:0}
legend{font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);padding-right:8px}
.controls label{margin-top:8px}
.controls #reset{margin-top:12px}
.model-results{font-weight:600;padding:14px;border-left:3px solid var(--blue);background:#fff}
.choice-grid{display:flex;flex-wrap:wrap;gap:6px 8px;margin-bottom:6px}
.choice{display:flex;align-items:center;gap:8px;min-height:44px;padding:4px 12px 4px 8px;border:1px solid var(--rule);background:#fff;font-weight:500;cursor:pointer}
.choice input{width:20px;height:20px;margin:0;accent-color:var(--blue)}
.choice:has(input:checked){border-color:var(--blue);color:var(--blue);font-weight:700}
.choice:has(input:focus-visible){outline:3px solid var(--blue);outline-offset:2px}
summary{cursor:pointer;min-height:44px;display:flex;align-items:center;font-weight:600}
details p{max-width:820px;font-size:14px}

footer{border-top:1px solid var(--ink);margin-top:44px;padding-top:18px;font-size:12px}

/* ---------- Wide screens: the picture holds still while the words change ---------- */
@media(min-width:900px){
  [data-step]{grid-template-columns:minmax(0,1.18fr) minmax(0,1fr);column-gap:40px;grid-template-rows:auto auto auto auto 1fr;grid-template-areas:"visual eyebrow" "visual title" "visual caption" "visual check" "visual ."}
  [data-step]>.visual{align-self:start;position:sticky;top:calc(var(--top) + 14px)}
  [data-step]>.eyebrow{margin-top:6px}
  .caption{margin-top:0}
  [data-step] .visual svg{max-height:calc(100vh - var(--top) - 150px);min-height:300px;width:auto;max-width:100%}
}
@media(max-width:899px){
  .explore-grid,.cv-top,.lx-sum{grid-template-columns:minmax(0,1fr)}
  /* One column: the picture may take most of the screen but never so little width that its type drops below 12 px. */
  [data-step] .visual svg{max-height:62svh;width:auto;max-width:100%}
}
/* A phone on its side: the site bar scrolls away and the picture sits beside its words, the whole picture on screen. */
@media(max-height:500px) and (min-width:620px){
  :root{--top:0px}
  .site-top{position:relative}
  [data-step]{grid-template-columns:minmax(0,1fr) minmax(0,1fr);column-gap:24px;grid-template-rows:auto auto auto auto 1fr;grid-template-areas:"visual eyebrow" "visual title" "visual caption" "visual check" "visual ."}
  [data-step]>.visual{align-self:start;position:sticky;top:8px}
  [data-step] .visual svg{max-height:calc(100svh - 72px);width:auto;max-width:100%}
  h2{font-size:22px;margin:4px 0 8px}
  .caption{font-size:16px;margin-top:0}
  .step-nav{position:static}
}
@media(max-width:760px){
  .lx-plan{grid-template-columns:minmax(0,1fr)}
  .lx-plan>div+div{border-left:0;border-top:1px solid var(--rule)}
  .value-row{grid-template-columns:minmax(0,1fr)}
}
/* Phones: the picture, its words and Next fit on one screen; the site bar scrolls away. */
@media(max-width:620px){
  :root{--top:0px}
  .site-top{position:relative}
  main{padding:22px 16px 20px}
  h1{font-size:40px}
  .lede{font-size:16px}
  .lx-plan>div{padding:16px}
  .tabs{margin-top:22px}
  .tabs button{font-size:14px;padding:10px 10px}
  [role=tabpanel]{padding-top:16px}
  .lx-rail{gap:6px;margin-bottom:12px}
  .lx-rail .lx-stage{display:none}
  .lx-rail ol{gap:2px}
  .lx-rail button{height:6px}
  h2{font-size:21px;margin:2px 0 8px}
  .caption{font-size:16px;margin:12px 0}
  .readout{flex-wrap:nowrap;overflow-x:auto;gap:18px;padding:8px 10px;scrollbar-width:thin}
  .readout li{white-space:nowrap;flex:none}
  .readout .head{display:none}
  .lx-player{padding:4px 6px;gap:6px}
  .lx-player button{min-height:38px;min-width:42px;padding:4px 8px}
  .lx-player input[type=range]{min-height:38px}
  .lx-player .lx-when{display:none}
  .lx-check{padding:14px;margin:12px 0}
  .lx-check .lx-q{font-size:16px}
  .step-nav{position:sticky;bottom:0;z-index:10;background:var(--paper);margin-top:8px;padding:8px 0 10px;box-shadow:0 -8px 14px var(--paper)}
  .step-nav button{min-width:0;padding:9px 14px}
  .lx-qs>li{grid-template-columns:30px minmax(0,1fr);gap:4px 10px}
  .lx-qs>li::before{font-size:24px}
  .hint{font-size:12px}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

/* ---------- Print: the lesson's summary on one sheet ---------- */
@media print{
  :root{--top:0px}
  body{background:#fff;font-size:12pt}
  .site-top,.skip,.tabs,.step-nav,.lx-rail,.lx-player,.lx-start,.lx-print,.lx-quiz-foot,.hint,footer{display:none!important}
  [role=tabpanel]{padding-top:8pt}
  .lx-plan,.lx-next{border-color:#000}
  .visual{break-inside:avoid}
  a{color:#000}
  /* The summary on paper: its own goals list replaces the plan box, and the terms run in two columns. */
  body:has(#summary:not([hidden])) .lx-plan,body:has(#summary:not([hidden])) .lede{display:none}
  .lx-sum{display:block}
  .lx-sum>section+section{margin-top:18pt}
  .lx-terms{columns:2;column-gap:24pt}
  .lx-terms dt{break-after:avoid}
  .lx-terms dd{break-inside:avoid}
  .lx-takeaways li,.lx-goals li{break-inside:avoid}
}

/* Site top bar. It names the site and links its sections and carries no edition number, so a new edition of the
   site never has to touch a lesson; it keeps the lessons' own look. The pipeline's template for a new lesson
   (templates/site-top-lesson.html, outside this repo) has to match the bar on these pages. */
.site-top{position:sticky;top:0;z-index:50;background:rgba(247,247,242,.96);border-bottom:1px solid #171916;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);font-family:'Space Grotesk',system-ui,-apple-system,'Segoe UI',sans-serif}
.site-top-in{max-width:1600px;margin:0 auto;padding-inline:clamp(22px,4vw,64px);height:78px;display:flex;align-items:center;gap:28px}
.site-brand{font-weight:700;font-size:21px;letter-spacing:-.035em;color:#171916;text-decoration:none;white-space:nowrap}
.site-brand span{color:#254dff;padding-inline:5px}
.site-nav{margin-left:auto;display:flex;align-items:center;gap:26px}
.site-nav a{color:#171916;text-decoration:none;font-size:13px;white-space:nowrap}
.site-nav a:hover{color:#254dff}
.site-nav a[aria-current]{color:#254dff;font-weight:600;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:6px}
.site-top a:focus-visible{outline:3px solid #254dff;outline-offset:3px}
@media(max-width:850px){.site-top-in{height:70px}.site-nav{gap:17px}.site-nav a{font-size:12px}}
@media(max-width:620px){.site-top{position:relative}.site-top-in{height:66px;gap:15px}.site-brand{font-size:19px}.site-nav{gap:18px}.site-nav a{display:none}.site-nav a.site-nav-home,.site-nav a.site-nav-lab{display:block}}
@media print{.site-top{position:static}}
@media(max-height:500px) and (min-width:620px){.site-top{position:relative}}