/* Verified Analytical Laboratory — site styles
   Palette: bench-white paper, slate ink, petrol structure, ICP-plasma violet accent,
   amber reserved for "pending confirmation" placeholders only. */
:root {
  --paper: #f4f7f6;
  --paper-2: #e9efed;
  --card: #ffffff;
  --ink: #0f2229;
  --ink-2: #3c5159;
  --ink-3: #6b7f86;
  --petrol: #0b4f5c;
  --petrol-2: #08404b;
  --plasma: #6d3fe0;
  --plasma-soft: #ece6fd;
  --rule: #d3dddb;
  --amber: #b9821a;
  --amber-soft: #fdf3dc;
  --display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --body: "Source Serif 4", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --wrap: 1180px;
  --gut: clamp(18px, 4vw, 40px);
  --r: 6px;
}

*, *::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: none !important; transition: none !important; } }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 1.0625rem/1.65 var(--body);
  font-optical-sizing: auto;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--petrol); text-underline-offset: .18em; text-decoration-thickness: 1px; }
a:hover { color: var(--plasma); }
:focus-visible { outline: 2px solid var(--plasma); outline-offset: 3px; border-radius: 2px; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding-inline: var(--gut); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: #fff; padding: 8px 14px; z-index: 50; }
.skip:focus { left: 8px; }

/* ---------- type ---------- */
h1, h2, h3, h4 { font-family: var(--display); font-stretch: 112%; color: var(--ink); margin: 0 0 .5em; letter-spacing: -.012em; }
h1 { font-size: clamp(2.2rem, 5.2vw, 3.9rem); line-height: 1.04; font-weight: 650; }
h2 { font-size: clamp(1.6rem, 3vw, 2.35rem); line-height: 1.12; font-weight: 620; }
h3 { font-size: 1.22rem; line-height: 1.25; font-weight: 620; }
h4 { font-size: 1rem; font-weight: 640; }
p { margin: 0 0 1em; }
.lede { font-size: clamp(1.12rem, 1.6vw, 1.3rem); color: var(--ink-2); max-width: 40em; }
.mono, .tag, .eyebrow, code { font-family: var(--mono); }
.eyebrow { font-size: .76rem; letter-spacing: .14em; text-transform: uppercase; color: var(--petrol); margin: 0 0 1rem; display: flex; align-items: center; gap: .6em; }
.eyebrow::before { content: ""; width: 22px; height: 1px; background: currentColor; }
.muted { color: var(--ink-3); }
.prose { max-width: 46em; }
.prose h2 { margin-top: 2.2em; font-size: clamp(1.35rem, 2.2vw, 1.7rem); }
.prose h3 { margin-top: 1.8em; }
.prose ul, .prose ol { padding-left: 1.2em; }
.prose li { margin-bottom: .4em; }

/* ---------- placeholder chip (pending confirmation; grep "ph-" before launch) ---------- */
.ph { font-family: var(--mono); font-size: .8em; background: var(--amber-soft); color: #6d4a07; border: 1px dashed var(--amber); border-radius: 3px; padding: .05em .45em; white-space: normal; }
.ph-block { font-family: var(--mono); font-size: .85rem; background: var(--amber-soft); color: #6d4a07; border: 1px dashed var(--amber); border-radius: var(--r); padding: 14px 16px; margin: 1.2em 0; }

/* ---------- header ---------- */
.site-head { background: var(--paper); border-bottom: 1px solid var(--rule); position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; }
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand:hover { color: var(--ink); }
.tile { width: 44px; height: 44px; border: 1.5px solid var(--ink); border-radius: 3px; position: relative; display: grid; place-items: center; font: 700 1.02rem/1 var(--display); font-stretch: 100%; letter-spacing: -.02em; flex: none; }
.tile::before { content: "OH"; position: absolute; top: 3px; left: 4px; font: 500 .5rem/1 var(--mono); letter-spacing: .02em; }
.tile::after { content: ""; position: absolute; bottom: 4px; left: 6px; right: 6px; height: 2px; background: var(--plasma); }
.brand-name { font: 640 .98rem/1.1 var(--display); font-stretch: 108%; }
.brand-name small { display: block; font: 400 .7rem/1.3 var(--mono); color: var(--ink-3); letter-spacing: .06em; text-transform: uppercase; margin-top: 3px; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a { font: 500 .93rem/1 var(--display); color: var(--ink); text-decoration: none; padding: 10px 12px; border-radius: 4px; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--plasma); }
.nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--plasma); border-radius: 0; }
.nav a.btn { color: #fff; padding: 10px 14px; margin-left: 8px; border-radius: 4px; }
.nav a.btn:hover { color: #fff; }
.btn { display: inline-flex; align-items: center; gap: .55em; font: 600 .95rem/1 var(--display); text-decoration: none; padding: 14px 20px; border-radius: 4px; border: 1.5px solid var(--ink); background: var(--ink); color: #fff; cursor: pointer; transition: background .15s, border-color .15s, color .15s; }
.btn:hover { background: var(--plasma); border-color: var(--plasma); color: #fff; }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover { border-color: var(--plasma); color: var(--plasma); background: transparent; }
.btn.small { padding: 10px 14px; font-size: .88rem; }
.btn .arr { font-family: var(--mono); }
.menu-toggle { display: none; }
.menu-btn { display: none; }

@media (max-width: 980px) {
  .menu-btn { display: inline-flex; align-items: center; gap: 8px; font: 600 .9rem/1 var(--display); border: 1.5px solid var(--ink); border-radius: 4px; padding: 10px 12px; cursor: pointer; background: transparent; color: var(--ink); }
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--paper); border-bottom: 1px solid var(--rule); flex-direction: column; align-items: stretch; padding: 8px var(--gut) 18px; }
  .nav a { padding: 14px 0; border-bottom: 1px solid var(--rule); }
  .nav a[aria-current="page"] { box-shadow: none; }
  .nav .btn { margin-top: 14px; justify-content: center; }
  .menu-toggle:checked ~ .nav { display: flex; }
  .brand-name small { display: none; }
}

/* ---------- hero ---------- */
.hero { padding-block: clamp(48px, 7vw, 96px) clamp(48px, 6vw, 80px); border-bottom: 1px solid var(--rule); }
.hero .wrap { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero h1 em { font-style: normal; color: var(--plasma); }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-note { margin-top: 26px; font: 400 .82rem/1.5 var(--mono); color: var(--ink-3); }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; } }

/* ---------- signature: certificate of analysis specimen ---------- */
.coa { background: var(--card); border: 1px solid var(--rule); border-radius: var(--r); box-shadow: 0 1px 0 var(--rule), 0 24px 48px -28px rgba(15,34,41,.35); font-family: var(--mono); font-size: .8rem; color: var(--ink-2); overflow: hidden; }
.coa-head { display: flex; justify-content: space-between; gap: 12px; padding: 16px 18px 12px; border-bottom: 1px solid var(--rule); }
.coa-head b { display: block; font: 650 .95rem/1.2 var(--display); font-stretch: 108%; color: var(--ink); }
.coa-meta { display: grid; grid-template-columns: repeat(3, 1fr); border-bottom: 1px solid var(--rule); }
.coa-meta div { padding: 10px 18px; border-right: 1px solid var(--rule); }
.coa-meta div:last-child { border-right: 0; }
.coa-meta span { display: block; font-size: .66rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.coa-meta strong { color: var(--ink); font-weight: 500; }
.coa-trace { padding: 14px 18px 4px; border-bottom: 1px solid var(--rule); }
.coa-trace svg { width: 100%; height: auto; }
.coa-trace .t-line { fill: none; stroke: var(--plasma); stroke-width: 1.6; stroke-linejoin: round; stroke-dasharray: 1400; stroke-dashoffset: 1400; animation: trace 2.4s .3s cubic-bezier(.4,.1,.2,1) forwards; }
.coa-trace .t-base { stroke: var(--rule); stroke-width: 1; }
.coa-trace text { font: 500 9px var(--mono); fill: var(--ink-3); }
@keyframes trace { to { stroke-dashoffset: 0; } }
.coa table { width: 100%; border-collapse: collapse; }
.coa th { text-align: left; font-weight: 500; font-size: .66rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); padding: 10px 18px 6px; }
.coa td { padding: 8px 18px; border-top: 1px dashed var(--rule); color: var(--ink); }
.coa td:last-child, .coa th:last-child { text-align: right; }
.coa .pass { color: var(--petrol); font-weight: 600; }
.coa-foot { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 12px 18px; background: var(--paper); border-top: 1px solid var(--rule); font-size: .7rem; color: var(--ink-3); }
.coa-foot .sig { font: italic 400 1.05rem/1 var(--body); color: var(--ink-2); }

/* ---------- sections ---------- */
.section { padding-block: clamp(56px, 8vw, 104px); }
.section.alt { background: var(--paper-2); border-block: 1px solid var(--rule); }
.section.dark { background: var(--ink); color: #d7e2e2; }
.section.dark h2, .section.dark h3 { color: #fff; }
.section.dark .eyebrow { color: #b9a6f5; }
.section-head { display: grid; grid-template-columns: 1fr 1fr; gap: 24px 64px; align-items: end; margin-bottom: 44px; }
.section-head p { color: var(--ink-2); margin: 0; }
.section.dark .section-head p { color: #a9bcbf; }
@media (max-width: 820px) { .section-head { grid-template-columns: 1fr; } }

/* test-category grid: tag line lists real analytes / organisms for each category */
.tests { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); border-top: 1px solid var(--rule); border-left: 1px solid var(--rule); }
.test { display: flex; flex-direction: column; padding: 26px 24px 24px; border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); background: var(--card); text-decoration: none; color: var(--ink); transition: background .15s; min-height: 230px; }
.test:hover { background: var(--plasma-soft); color: var(--ink); }
.test .tag { font-size: .74rem; color: var(--plasma); letter-spacing: .04em; margin-bottom: 16px; }
.test h3 { margin-bottom: .4em; }
.test p { color: var(--ink-2); font-size: .97rem; margin: 0 0 16px; }
.test .more { margin-top: auto; font: 500 .8rem/1 var(--mono); color: var(--petrol); }

/* process (a real sequence, so it is numbered) */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; border-top: 1.5px solid var(--ink); }
.steps li { counter-increment: step; padding: 22px 22px 0 0; position: relative; }
.steps li::before { content: "Step " counter(step); display: block; font: 500 .74rem/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--plasma); margin-bottom: 14px; }
.steps li::after { content: ""; position: absolute; top: -5px; left: 0; width: 9px; height: 9px; border-radius: 50%; background: var(--plasma); }
.steps p { color: var(--ink-2); font-size: .97rem; }
.section.dark .steps { border-top-color: #4c6670; }
.section.dark .steps p { color: #a9bcbf; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr 1fr; row-gap: 26px; } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

/* industries */
.inds { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.ind { background: var(--card); border: 1px solid var(--rule); border-radius: var(--r); padding: 24px; text-decoration: none; color: var(--ink); display: flex; flex-direction: column; }
.ind:hover { border-color: var(--plasma); color: var(--ink); }
.ind .tag { font-size: .72rem; color: var(--ink-3); text-transform: uppercase; letter-spacing: .1em; margin-bottom: 12px; }
.ind p { color: var(--ink-2); font-size: .96rem; margin: 0 0 14px; }
.ind .more { margin-top: auto; font: 500 .8rem/1 var(--mono); color: var(--petrol); }

/* two-col feature list */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 72px); align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }
.checks { list-style: none; padding: 0; margin: 0; }
.checks li { padding: 14px 0 14px 30px; border-bottom: 1px solid var(--rule); position: relative; }
.checks li::before { content: ""; position: absolute; left: 2px; top: 22px; width: 12px; height: 6px; border-left: 2px solid var(--plasma); border-bottom: 2px solid var(--plasma); transform: rotate(-45deg); }
.section.dark .checks li { border-color: #2b4048; }

/* page header (inner pages) */
.page-head { padding-block: clamp(40px, 6vw, 76px) clamp(32px, 4vw, 52px); border-bottom: 1px solid var(--rule); }
.crumbs { font: 400 .78rem/1.4 var(--mono); color: var(--ink-3); margin-bottom: 18px; }
.crumbs a { color: var(--ink-3); }
.page-head .lede { margin-top: .6em; }
.page-body { padding-block: clamp(40px, 6vw, 72px); }
.with-aside { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: clamp(32px, 5vw, 72px); align-items: start; }
@media (max-width: 920px) { .with-aside { grid-template-columns: minmax(0, 1fr); } }
.aside { position: sticky; top: 96px; display: grid; gap: 16px; }
@media (max-width: 920px) { .aside { position: static; } }
.card { background: var(--card); border: 1px solid var(--rule); border-radius: var(--r); padding: 22px; }
.card h4 { margin-bottom: .6em; }
.card p { font-size: .95rem; color: var(--ink-2); }
.card ul { list-style: none; padding: 0; margin: 0; font-size: .95rem; }
.card li { padding: 7px 0; border-top: 1px solid var(--rule); }
.card li:first-child { border-top: 0; }

/* analyte / method tables */
.tbl-wrap { overflow-x: auto; margin: 1.2em 0 1.6em; border: 1px solid var(--rule); border-radius: var(--r); background: var(--card); }
.tbl { width: 100%; border-collapse: collapse; font-size: .93rem; min-width: 560px; }
.tbl th { text-align: left; font: 500 .7rem/1.3 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); padding: 12px 16px; background: var(--paper); border-bottom: 1px solid var(--rule); }
.tbl td { padding: 12px 16px; border-bottom: 1px solid var(--rule); vertical-align: top; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl td:first-child { font-weight: 600; font-family: var(--display); font-stretch: 105%; font-size: .95rem; }
.tbl .mono { font-size: .84rem; color: var(--ink-2); }

/* FAQ */
.faq { border-top: 1.5px solid var(--ink); }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary { list-style: none; cursor: pointer; padding: 20px 40px 20px 0; position: relative; font: 600 1.05rem/1.35 var(--display); font-stretch: 105%; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 16px; font: 400 1.4rem/1 var(--mono); color: var(--plasma); }
.faq details[open] summary::after { content: "−"; }
.faq .a { padding: 0 0 20px; color: var(--ink-2); max-width: 46em; }
.faq-group { margin-bottom: 48px; }
.faq-group > h2 { font-size: 1.1rem; font-family: var(--mono); font-stretch: 100%; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; color: var(--petrol); }

/* forms */
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form .full { grid-column: 1 / -1; }
@media (max-width: 640px) { .form { grid-template-columns: 1fr; } }
.field label { display: block; font: 600 .86rem/1.3 var(--display); margin-bottom: 7px; }
.field label .opt { font: 400 .76rem var(--mono); color: var(--ink-3); margin-left: 4px; }
.field input, .field select, .field textarea { width: 100%; font: 400 1rem/1.4 var(--body); color: var(--ink); background: var(--card); border: 1px solid #b9c7c5; border-radius: 4px; padding: 12px 13px; }
.field textarea { min-height: 150px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--plasma); outline-offset: 0; border-color: var(--plasma); }
.hp { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; overflow: hidden; }
.form-status { grid-column: 1 / -1; font: 400 .92rem/1.5 var(--mono); padding: 12px 14px; border-radius: 4px; }
.form-status.ok { background: #e3f2ee; color: var(--petrol-2); border: 1px solid #9fcfc3; }
.form-status.err { background: #fbe9e7; color: #8a2a1b; border: 1px solid #e7b2a8; }
.fine { font-size: .84rem; color: var(--ink-3); }

/* CTA band */
.cta-band { background: var(--petrol); color: #dcebec; padding-block: clamp(48px, 6vw, 72px); }
.cta-band .wrap { display: flex; justify-content: space-between; align-items: center; gap: 24px 48px; flex-wrap: wrap; }
.cta-band h2 { color: #fff; margin: 0 0 .3em; }
.cta-band p { margin: 0; max-width: 36em; }
.cta-band .btn { background: #fff; color: var(--ink); border-color: #fff; }
.cta-band .btn:hover { background: var(--plasma); border-color: var(--plasma); color: #fff; }
.cta-band .btn.ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.6); }

/* footer */
.site-foot { background: var(--ink); color: #a9bcbf; padding-block: 56px 32px; font-size: .93rem; }
.site-foot a { color: #d7e2e2; text-decoration: none; }
.site-foot a:hover { color: #fff; text-decoration: underline; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
@media (max-width: 860px) { .foot-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .foot-grid { grid-template-columns: 1fr; } }
.site-foot h4 { color: #fff; font-size: .8rem; font-family: var(--mono); font-weight: 500; letter-spacing: .12em; text-transform: uppercase; }
.site-foot ul { list-style: none; padding: 0; margin: 0; }
.site-foot li { margin-bottom: 8px; }
.site-foot .tile { border-color: #d7e2e2; color: #fff; }
.site-foot .brand { color: #fff; margin-bottom: 16px; }
.site-foot .ph { background: #3a3220; color: #f3d48c; border-color: #b9821a; }
.foot-base { margin-top: 44px; padding-top: 20px; border-top: 1px solid #2b4048; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font: 400 .78rem/1.5 var(--mono); }