/* PepSteady — lab-bench editorial: navy ink, vial-cap amber, syringe blue */
:root{
  --bg:#f3f6f9; --surface:#ffffff; --raised:#f7f9fb; --ink:#0f1d2e; --muted:#566779; --line:#d6dee7;
  --accent:#b8720f; --accent-strong:#c77d12; --accent-soft:#fbefd9; --cool:#1f5f8b; --cool-soft:#e2eef7;
  --ok:#1d7a4e; --ok-soft:#e1f3ea; --warn:#9a5a12; --warn-soft:#fbeedd; --bad:#b03a2b; --bad-soft:#fae4e0;
  --hero:#0f1d2e; --hero-ink:#e6edf4; --hero-muted:#9fb0c2;
  --f-display:"Bricolage Grotesque",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-body:"Source Sans 3",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --radius:14px; --wrap:1140px;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0a121b; --surface:#122030; --raised:#172738; --ink:#e6edf4; --muted:#9aabbd; --line:#25384d;
  --accent:#f0a338; --accent-strong:#f0a338; --accent-soft:#30240f; --cool:#6fb3e3; --cool-soft:#14304a;
  --ok:#4cc38a; --ok-soft:#10301f; --warn:#f0b260; --warn-soft:#33240f; --bad:#f08a77; --bad-soft:#3a1712;
  --hero:#071019; --hero-ink:#e6edf4; --hero-muted:#93a4b6; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0a121b; --surface:#122030; --raised:#172738; --ink:#e6edf4; --muted:#9aabbd; --line:#25384d;
  --accent:#f0a338; --accent-strong:#f0a338; --accent-soft:#30240f; --cool:#6fb3e3; --cool-soft:#14304a;
  --ok:#4cc38a; --ok-soft:#10301f; --warn:#f0b260; --warn-soft:#33240f; --bad:#f08a77; --bad-soft:#3a1712;
  --hero:#071019; --hero-ink:#e6edf4; --hero-muted:#93a4b6; color-scheme:dark}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.6 var(--f-body)}
img,svg{max-width:100%;height:auto}
a{color:var(--cool);text-underline-offset:2px}
a:hover{color:var(--ink)}
:focus-visible{outline:2px solid var(--accent-strong);outline-offset:2px;border-radius:4px}
h1,h2,h3{font-family:var(--f-display);line-height:1.15;margin:0;text-wrap:balance;letter-spacing:-.01em}
h1{font-size:clamp(2rem,4.6vw,3.2rem);letter-spacing:-.025em}
h2{font-size:clamp(1.45rem,2.6vw,1.95rem)}
h3{font-size:1.15rem}
p{margin:0}
.wrap{max-width:var(--wrap);margin:0 auto;padding-left:max(18px,env(safe-area-inset-left,0px));padding-right:max(18px,env(safe-area-inset-right,0px))}
.eyebrow{font:600 .74rem var(--f-mono);letter-spacing:.13em;text-transform:uppercase;color:var(--accent)}
.muted{color:var(--muted)}
.mono{font-family:var(--f-mono);font-variant-numeric:tabular-nums}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:var(--surface);padding:8px 12px;border-radius:8px;z-index:50}
.skip:focus{left:12px}

/* header */
.site-head{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--surface) 94%,transparent);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.site-head .wrap{display:flex;align-items:center;gap:18px;min-height:64px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:9px;font:700 1.25rem var(--f-display);color:var(--ink);text-decoration:none}
.logo svg{flex:none}
.nav{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
.nav a{color:var(--muted);text-decoration:none;font-weight:600;font-size:.95rem;padding:8px 10px;border-radius:8px}
.nav a:hover,.nav a[aria-current="page"]{color:var(--ink);background:var(--raised)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:700 .95rem var(--f-body);border:1px solid var(--ink);background:var(--ink);color:var(--surface);border-radius:10px;padding:11px 18px;text-decoration:none;cursor:pointer;white-space:nowrap}
.btn:hover{color:var(--surface);opacity:.92}
.btn.amber{background:var(--accent-strong);border-color:var(--accent-strong);color:#0f1d2e}
.btn.amber:hover{color:#0f1d2e}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{color:var(--ink);border-color:var(--ink)}
.btn.sm{padding:7px 12px;font-size:.85rem}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 10px;color:var(--ink)}
@media (max-width:900px){
  .menu-btn{display:inline-flex}
  .nav{display:none;width:100%;flex-direction:column;padding-bottom:12px}
  .nav.open{display:flex}
  .head-cta{display:none}
}

/* hero */
.hero{background:var(--hero);color:var(--hero-ink)}
.hero .wrap{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center;padding-block:64px 72px}
.hero .wrap>*{min-width:0}
.hero h1{color:var(--hero-ink)}
.hero .lead{color:var(--hero-muted);font-size:1.15rem;max-width:36ch;margin-top:18px}
.hero .eyebrow{color:#f0a338}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.hero .btn.ghost{color:var(--hero-ink);border-color:#2c4258}
.trust{display:flex;gap:18px;flex-wrap:wrap;margin-top:26px;font:500 .8rem var(--f-mono);color:var(--hero-muted)}
.trust span{display:flex;align-items:center;gap:6px}
.trust i{width:7px;height:7px;border-radius:50%;background:#4cc38a;display:inline-block}
@media (max-width:900px){.hero .wrap{grid-template-columns:1fr;padding-block:40px 48px;gap:32px}}

/* instrument (calculator) */
.bench{background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:18px;padding:22px;display:grid;gap:16px;box-shadow:0 30px 60px -30px rgba(0,0,0,.45)}
.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
label{display:grid;gap:5px;font-size:.82rem;font-weight:600;color:var(--muted)}
input,select,textarea{font:500 1rem var(--f-mono);padding:10px 12px;border:1px solid var(--line);border-radius:9px;background:var(--raised);color:var(--ink);width:100%;min-width:0}
textarea{font-family:var(--f-body)}
.inrow{display:flex;gap:6px}.inrow input{flex:1 1 auto}.inrow select{width:auto;flex:0 0 84px;padding-right:6px}
.readout{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.readout div{border-top:2px solid var(--line);padding-top:8px;min-width:0}
.readout div.main{border-top-color:var(--accent-strong)}
.readout b{display:block;font:600 1.6rem var(--f-mono);font-variant-numeric:tabular-nums}
.readout span{font-size:.8rem;color:var(--muted)}
.syringe{width:100%;display:block}
.steps{font:400 .8rem/1.75 var(--f-mono);background:var(--raised);border-radius:9px;padding:12px 14px;color:var(--muted);overflow-x:auto;white-space:pre;margin:0}
.calc-alert{font-size:.86rem;color:var(--bad);min-height:1.2em}
@media (max-width:520px){.fields{grid-template-columns:1fr}.readout b{font-size:1.25rem}}

/* sections */
.section{padding-block:72px}
.section.alt{background:var(--surface);border-block:1px solid var(--line)}
.sec-head{display:flex;justify-content:space-between;align-items:end;gap:16px;flex-wrap:wrap;margin-bottom:28px}
.sec-head p{max-width:60ch;margin-top:8px}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid>*{min-width:0}
@media (max-width:900px){.g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}.g2{grid-template-columns:minmax(0,1fr)}}
@media (max-width:560px){.g3,.g4{grid-template-columns:minmax(0,1fr)}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;display:grid;gap:8px;align-content:start;text-decoration:none;color:var(--ink)}
a.card:hover{border-color:var(--cool);color:var(--ink)}
.card p{color:var(--muted);font-size:.95rem}
.card .meta{font:500 .76rem var(--f-mono);color:var(--muted)}
.feature{display:grid;gap:8px}
.feature .ic{width:42px;height:42px;border-radius:11px;background:var(--cool-soft);display:flex;align-items:center;justify-content:center;color:var(--cool)}
.feature p{color:var(--muted);font-size:.95rem}
.steps-row{counter-reset:s;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.steps-row li{list-style:none;counter-increment:s;display:grid;gap:6px}
.steps-row li::before{content:counter(s);font:600 .9rem var(--f-mono);width:30px;height:30px;border-radius:50%;background:var(--ink);color:var(--surface);display:flex;align-items:center;justify-content:center}
.steps-row{padding:0;margin:0}
@media (max-width:760px){.steps-row{grid-template-columns:1fr}}

/* chips & status */
.chip{display:inline-flex;align-items:center;font:600 .68rem var(--f-mono);letter-spacing:.06em;text-transform:uppercase;border-radius:999px;padding:3px 9px;white-space:nowrap}
.chip.fda{background:var(--ok-soft);color:var(--ok)}
.chip.inv{background:var(--warn-soft);color:var(--warn)}
.chip.not{background:var(--bad-soft);color:var(--bad)}
.chip.cat{background:var(--cool-soft);color:var(--cool)}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
.filters button,.filters a{border:1px solid var(--line);background:var(--surface);color:var(--muted);border-radius:999px;padding:6px 13px;font:600 .86rem var(--f-body);cursor:pointer;text-decoration:none}
.filters [aria-pressed="true"],.filters a[aria-current="page"]{border-color:var(--ink);color:var(--ink)}
.search{max-width:320px}

/* article */
.crumbs{font-size:.85rem;color:var(--muted);display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.crumbs a{color:var(--muted)}
.article-head{padding-block:48px 28px;border-bottom:1px solid var(--line);background:var(--surface)}
.article-head .lede{font-size:1.15rem;color:var(--muted);max-width:62ch;margin-top:14px}
.byline{display:flex;gap:14px;flex-wrap:wrap;margin-top:16px;font:500 .8rem var(--f-mono);color:var(--muted)}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;padding-block:36px 64px}
@media (max-width:980px){.article-layout{grid-template-columns:minmax(0,1fr)}}
.article-layout>*,.prose,.aside{min-width:0}
.prose{overflow-wrap:anywhere}
.prose{max-width:70ch}
.prose h2{margin:2.1em 0 .6em}
.prose h3{margin:1.6em 0 .4em}
.prose p,.prose ul,.prose ol{margin:0 0 1.05em}
.prose li{margin:.3em 0}
.prose table{border-collapse:collapse;width:100%;font-size:.94rem}
.prose .tbl{overflow-x:auto;margin:0 0 1.2em;border:1px solid var(--line);border-radius:10px}
.prose th,.prose td{border-bottom:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}
.prose th{background:var(--raised);font:600 .74rem var(--f-mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.prose code{font-family:var(--f-mono);font-size:.9em;background:var(--raised);padding:1px 5px;border-radius:5px}
.prose blockquote{margin:0 0 1em;padding:10px 16px;border-left:3px solid var(--line);color:var(--muted)}
.prose h2#key-takeaways+ul{background:var(--cool-soft);border-radius:12px;padding:16px 16px 16px 34px}
.aside{display:grid;gap:18px;align-content:start}
.aside .sticky{position:sticky;top:84px;display:grid;gap:18px}
.toc{font-size:.9rem}
.toc ol{margin:8px 0 0;padding-left:18px;display:grid;gap:5px}
.toc a{color:var(--muted);text-decoration:none}
.toc a:hover{color:var(--ink)}
.cta-box{background:var(--hero);color:var(--hero-ink);border-radius:var(--radius);padding:20px;display:grid;gap:10px}
.cta-box p{color:var(--hero-muted);font-size:.92rem}
.disclaimer{background:var(--accent-soft);border-left:4px solid var(--accent-strong);border-radius:0 12px 12px 0;padding:14px 16px;font-size:.92rem}
.disclaimer b{color:var(--ink)}
.shop{border:1px solid var(--line);border-radius:var(--radius);padding:18px;background:var(--surface);display:grid;gap:10px}
.shop ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.shop li a{display:flex;justify-content:space-between;gap:10px;align-items:center;border:1px solid var(--line);border-radius:10px;padding:10px 12px;text-decoration:none;color:var(--ink);font-weight:600}
.shop li a:hover{border-color:var(--accent-strong)}
.shop small{color:var(--muted);font-size:.78rem}
.ad-slot{margin:28px 0;min-height:120px;display:grid;place-items:center;border:1px dashed var(--line);border-radius:12px;color:var(--muted);font:500 .72rem var(--f-mono)}
.ad-slot ins{display:block;width:100%}
.faq details{border-bottom:1px solid var(--line);padding-block:14px}
.faq summary{cursor:pointer;font-weight:700;list-style-position:outside}
.faq details p{color:var(--muted);margin-top:8px;max-width:68ch}
.related{border-top:1px solid var(--line);padding-top:28px;margin-top:40px}

/* tools */
.tool{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px;align-items:start}
@media (max-width:900px){.tool{grid-template-columns:minmax(0,1fr)}}
.tool>*{min-width:0}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;display:grid;gap:14px}
.stat-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.stat{border-top:2px solid var(--line);padding-top:8px;min-width:0}
.stat.hi{border-top-color:var(--accent-strong)}
.stat b{display:block;font:600 1.45rem var(--f-mono);font-variant-numeric:tabular-nums}
.stat span{font-size:.8rem;color:var(--muted)}
table.plain{width:100%;border-collapse:collapse;font-size:.92rem}
table.plain th,table.plain td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line)}
table.plain th{font:600 .7rem var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
table.plain td.num{font-family:var(--f-mono);font-variant-numeric:tabular-nums}
.tablewrap{overflow-x:auto}

/* quiz */
.quiz-q{display:grid;gap:10px}
.opts{display:flex;flex-wrap:wrap;gap:8px}
.opts button{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:10px;padding:10px 14px;font:600 .95rem var(--f-body);cursor:pointer}
.opts button[aria-pressed="true"]{border-color:var(--ink);background:var(--ink);color:var(--surface)}
.progress-bar{height:6px;border-radius:3px;background:var(--line);overflow:hidden}
.progress-bar i{display:block;height:100%;background:var(--accent-strong)}

/* newsletter & footer */
.news{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}
@media (max-width:820px){.news{grid-template-columns:1fr}}
.news form{display:flex;gap:8px;flex-wrap:wrap}
.news input{flex:1;min-width:0;font-family:var(--f-body)}
.form-msg{font-size:.88rem;color:var(--ok);min-height:1.2em;margin-top:8px}
.site-foot{background:var(--hero);color:var(--hero-muted);padding-block:56px 40px;font-size:.92rem}
.site-foot a{color:var(--hero-ink);text-decoration:none}
.site-foot a:hover{text-decoration:underline;color:var(--hero-ink)}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(3,minmax(0,1fr));gap:28px}
.foot-grid h3{font:600 .74rem var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:#f0a338;margin-bottom:10px}
.foot-grid ul{list-style:none;margin:0;padding:0;display:grid;gap:7px}
.foot-legal{border-top:1px solid #22364b;margin-top:36px;padding-top:20px;display:grid;gap:8px;font-size:.82rem}
@media (max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.foot-grid{grid-template-columns:1fr}}
.page-head{padding-block:52px 32px;background:var(--surface);border-bottom:1px solid var(--line)}
.page-head p{max-width:62ch;margin-top:12px;color:var(--muted);font-size:1.08rem}
.legal-text{max-width:72ch;padding-block:40px 64px}
.legal-text h2{margin:1.8em 0 .5em;font-size:1.3rem}
.legal-text p,.legal-text ul{margin:0 0 1em}
@media (prefers-reduced-motion:no-preference){#fill,#plunger{transition:width .3s ease,x .3s ease}}

html,body{overflow-x:clip}
.ad-slot{max-width:100%;overflow:hidden}