/* psr3peptide.com - original stylesheet (academic notebook layout). */
:root{
  --brand:#0e8c8c; --brand-deep:#0a5f5f; --brand-tint:#e7f4f4;
  --ink:#122b3d; --ink-soft:#51667a; --line:#dfe7ec;
  --paper:#ffffff; --paper-warm:#f5f8fa;
  --accent:#c96f2e; --accent-tint:#fdf1e2;
  --deep:#0d2439; --gold:#e8b06a;
  --serif:Georgia,'Times New Roman',serif;
  --sans:system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--sans);color:var(--ink);background:#fff;
  font-size:16px;line-height:1.65}
img{max-width:100%}
a{color:var(--brand-deep)}
a:hover{color:var(--brand)}
h1,h2,h3,h4{font-family:var(--serif);line-height:1.28;color:var(--ink)}
h1{font-size:clamp(1.65rem,3.2vw,2.35rem);margin:.2em 0 .5em}
h2{font-size:1.34rem;margin:1.7em 0 .55em}
h3{font-size:1.12rem;margin:1.4em 0 .45em}
code,kbd{font-family:ui-monospace,Consolas,monospace;font-size:.92em;
  background:var(--paper-warm);border:1px solid var(--line);border-radius:4px;padding:1px 5px}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line)}
.header-inner{max-width:1180px;margin:0 auto;display:flex;align-items:center;
  gap:14px;padding:10px 22px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);
  margin-right:auto}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;
  background:var(--deep);color:var(--gold);border-radius:8px;font-family:var(--serif);
  font-weight:700;font-size:14px;letter-spacing:.02em}
.brand-name{font-family:var(--serif);font-size:1.12rem;font-weight:600}
.brand-name em{font-style:normal;color:var(--brand)}
.mainnav{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.mainnav a{text-decoration:none;color:var(--ink-soft);font-size:14.5px;
  padding:9px 12px;border-radius:6px}
.mainnav a:hover{color:var(--brand-deep);background:var(--brand-tint)}
.mainnav a.active{color:var(--brand-deep);background:var(--brand-tint);font-weight:600}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;
  width:42px;height:38px;cursor:pointer;padding:8px 9px}
.nav-toggle span{display:block;height:2px;background:var(--ink);margin:4px 0;border-radius:2px;
  transition:transform .2s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* compliance strip */
.compliance-strip{background:var(--deep);color:#c6d7e3;font-size:12.5px;
  padding:7px 20px;text-align:center;letter-spacing:.01em}
.compliance-strip b{color:var(--gold)}

/* breadcrumbs + page frame */
.crumbs{max-width:1180px;margin:0 auto;padding:14px 22px 0;font-size:12.5px;
  color:var(--ink-soft)}
.crumbs a{color:var(--ink-soft);text-decoration:none}
.crumbs a:hover{color:var(--brand)}
.crumbs .cur{color:var(--ink)}
.page{max-width:1180px;margin:0 auto;padding:16px 22px 70px}
.page-wide{max-width:1380px}

/* document layout: sticky table of contents */
.doc{display:grid;grid-template-columns:minmax(0,1fr) 252px;gap:44px;align-items:start}
.doc-aside{position:sticky;top:96px}
.toc{border-left:1px solid var(--line);padding-left:16px;font-size:13.2px}
.toc h4{font-family:var(--sans);font-size:11px;text-transform:uppercase;
  letter-spacing:.12em;color:var(--ink-soft);margin:4px 0 10px}
.toc a{display:block;color:var(--ink-soft);text-decoration:none;padding:4px 0}
.toc a:hover{color:var(--brand)}

/* home hero + hubs */
.hero{padding:34px 0 6px;border-bottom:1px solid var(--line);margin-bottom:8px}
.hero h1{font-size:clamp(2rem,4.6vw,3rem);margin:.1em 0 .35em}
.hero .lede{font-size:1.07rem;color:var(--ink-soft);max-width:62ch}
.hub{margin:38px 0}
.hub h2{display:flex;align-items:center;gap:10px;font-size:1.32rem;margin:0 0 .4em}
.hub h2::before{content:"";width:7px;height:24px;background:var(--brand);
  border-radius:3px;display:inline-block}
.hub p{color:var(--ink-soft);max-width:78ch}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(238px,1fr));gap:14px;
  margin-top:14px}
.card{display:flex;flex-direction:column;gap:6px;text-decoration:none;color:var(--ink);
  border:1px solid var(--line);border-radius:10px;padding:15px 17px;background:var(--paper);
  transition:border-color .15s,transform .15s,box-shadow .15s}
.card b{font-family:var(--serif);font-size:1.02rem}
.card span{font-size:13.4px;color:var(--ink-soft)}
.card:hover{border-color:var(--brand);transform:translateY(-2px);
  box-shadow:0 6px 18px rgba(14,140,140,.10);color:var(--ink)}
.why{background:var(--paper-warm);border-radius:14px;padding:24px 28px}
.why h2::before{background:var(--accent)}

/* tables */
.datatable{margin:20px 0;overflow-x:auto}
.datatable table{width:100%;border-collapse:collapse;font-size:14.2px}
.datatable caption{caption-side:top;text-align:left;font-size:12.5px;color:var(--ink-soft);
  padding:0 0 8px;letter-spacing:.02em}
.datatable th{background:var(--brand-tint);text-align:left;padding:9px 12px;
  border-bottom:2px solid var(--brand);font-size:13px;letter-spacing:.02em}
.datatable td{padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.datatable tr:nth-child(even) td{background:var(--paper-warm)}

/* lists */
ul.ticks{list-style:none;padding-left:0;margin:.6em 0}
ul.ticks li{padding:5px 0 5px 24px;position:relative}
ul.ticks li::before{content:"";position:absolute;left:4px;top:13px;width:8px;height:8px;
  background:var(--brand);border-radius:2px}
ul.refs{list-style:none;padding-left:0;margin:.5em 0}
ul.refs li{padding:6px 0;border-bottom:1px dotted var(--line);font-size:13.8px}
.fine{font-size:12.5px;color:var(--ink-soft)}

/* faq */
.faq details{border:1px solid var(--line);border-radius:9px;margin:9px 0;background:var(--paper)}
.faq summary{cursor:pointer;padding:12px 16px;font-weight:600;font-size:15px;list-style:none;
  display:flex;align-items:center;gap:10px}
.faq summary::before{content:"+";color:var(--brand);font-weight:700;font-size:18px;
  width:18px;flex-shrink:0}
.faq details[open] summary::before{content:"\2212"}
.faq summary::-webkit-details-marker{display:none}
.faq .ans{padding:0 16px 14px 44px;color:var(--ink-soft);font-size:14.6px}

/* boxes */
.authorbox{background:var(--paper-warm);border-left:3px solid var(--brand);
  border-radius:0 9px 9px 0;padding:11px 16px;font-size:13.6px;margin:18px 0}
.authorbox .ab-line{display:block}
.authorbox .ab-fine{display:block;color:var(--ink-soft);font-size:12.3px;margin-top:3px}
.contact-strip{background:var(--accent-tint);border-left:3px solid var(--accent);
  border-radius:0 9px 9px 0;padding:11px 16px;font-size:13.6px;margin:18px 0;
  color:#5c4322}

/* related */
.rcards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.rcard{display:flex;flex-direction:column;gap:4px;text-decoration:none;color:var(--ink);
  border:1px solid var(--line);border-radius:9px;padding:13px 15px;font-size:13.6px}
.rcard b{font-family:var(--serif);font-size:.99rem}
.rcard span{color:var(--ink-soft);font-size:12.3px;text-transform:capitalize}
.rcard:hover{border-color:var(--brand)}

/* footer */
.site-footer{background:var(--deep);color:#b9c9d6;margin-top:40px}
.foot-grid{max-width:1180px;margin:0 auto;padding:34px 22px 20px;display:grid;
  grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:22px}
.foot-grid h4{color:#fff;font-family:var(--sans);font-size:12px;text-transform:uppercase;
  letter-spacing:.14em;margin:0 0 10px}
.foot-grid a{display:block;color:#cfdde8;text-decoration:none;font-size:13.6px;padding:3px 0}
.foot-grid a:hover{color:var(--gold)}
.foot-legal{max-width:1180px;margin:0 auto;padding:16px 22px 26px;
  border-top:1px solid rgba(255,255,255,.12);font-size:12.4px;color:#93a9ba}
.foot-legal .fine{color:#8ba2b5}

/* promo bar */
#zr-promo{display:none;position:fixed;left:0;right:0;bottom:0;z-index:999;
  background:var(--deep);border-top:2px solid var(--brand);
  padding:11px 52px 11px 18px;text-align:center;font-size:14px}
#zr-promo .promolink{color:var(--gold);font-weight:700;text-decoration:none;letter-spacing:.02em}
#zr-promo .promolink:hover{text-decoration:underline;color:#ffd894}
#zr-promoclose{position:absolute;right:10px;top:50%;transform:translateY(-50%);
  background:none;border:1px solid rgba(255,255,255,.35);color:#cfdde8;border-radius:6px;
  width:28px;height:28px;cursor:pointer;font-size:14px;line-height:1}
#zr-promoclose:hover{background:rgba(255,255,255,.12)}

/* responsive */
@media (max-width:1100px){
  .doc{display:block}
  .doc-aside{position:static;margin-top:34px;border-top:1px solid var(--line);padding-top:14px}
}
@media (max-width:860px){
  .header-inner{flex-wrap:wrap}
  .nav-toggle{display:block}
  .mainnav{display:none;flex-basis:100%;flex-direction:column;align-items:stretch;
    padding:6px 0 10px}
  .mainnav.open{display:flex}
  .mainnav a{padding:11px 12px;border-top:1px solid var(--line);border-radius:0}
  .compliance-strip{font-size:11.6px;padding:7px 12px}
}

/* ---- vendors directory compatibility layer ---- */
.warn-note { background: var(--accent-tint); border: 1px solid #f0dcb8; border-radius: var(--radius);
  padding: 12px 16px; margin: 24px 0; max-width: 780px; font-size: 15px; }
.avatar { width: 52px; height: 52px; border-radius: 50%; flex: 0 0 52px;
  background: linear-gradient(135deg, #6faf5a, #3f7d3a); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: Verdana, Geneva, sans-serif; font-weight: 700; font-size: 17px; }
/* ---------- WhatsApp CTA strip ---------- */
.wa-strip { display: flex; gap: 14px; align-items: center; max-width: 780px;
  background: #f0f7ee; border: 1px dashed #a9c9a0; border-radius: var(--radius);
  padding: 14px 18px; margin: 30px 0; }
.wa-strip .wa-ico { font-size: 24px; }
.wa-strip p { margin: 0; font-size: 14.5px; color: var(--ink-soft); }
.wa-strip a.wa-btn { flex: 0 0 auto; background: #1faa53; color: #fff; border-radius: 999px;
  padding: 9px 18px; font-family: Verdana, Geneva, sans-serif; font-size: 13.5px; font-weight: 700; }
.wa-strip a.wa-btn:hover { background: #17863f; text-decoration: none; }
/* ---------- vendor directory (/vendors/) - layout cloned from the reference
   design (peptidecertify/vendors); colors remapped to the zesty palette ---------- */
.page .subtitle { color: var(--ink-soft); font-size: 16px; margin-top: 8px; max-width: 820px; }
.vd-disclaimer { background: var(--accent-tint); border: 1px solid #ecc98c; border-left: 4px solid #c8862c; border-radius: 8px; padding: 14px 16px; font-size: 13.5px; color: var(--ink); margin: 18px 0; }
.vd-disclaimer p { margin: 0; }
.vd-disclaimer b { color: #8a5a12; }
.vd-tabs { display: flex; gap: 8px; margin: 22px 0 14px; flex-wrap: wrap; }
.vd-tab { border: 1px solid var(--line); background: var(--paper); border-radius: 8px; padding: 8px 18px; font-family: Verdana, Geneva, sans-serif; font-size: 14px; font-weight: 700; color: var(--ink-soft); cursor: pointer; }
.vd-tab.on { background: var(--ink); border-color: var(--ink); color: #fff; }
.vd-search { position: relative; max-width: 640px; margin: 0 0 12px; }
.vd-search input { width: 100%; padding: 12px 14px 12px 40px; border: none; border-bottom: 2px solid var(--line); background: transparent; font-family: Verdana, Geneva, sans-serif; font-size: 16px; outline: none; }
.vd-search input:focus { border-bottom-color: var(--brand); }
.vd-search svg { position: absolute; left: 8px; top: 50%; transform: translateY(-50%); color: var(--ink-soft); }
.vd-chiprow { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-bottom: 10px; }
.vd-chiprow .lbl { font-family: Verdana, Geneva, sans-serif; font-size: 11px; font-weight: 700; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .06em; margin-right: 4px; }
.vd-chip { border: 1px solid var(--line); background: var(--paper); border-radius: 6px; padding: 5px 12px; font-family: Verdana, Geneva, sans-serif; font-size: 12px; font-weight: 700; color: var(--ink-soft); cursor: pointer; }
.vd-chip.on { background: var(--ink); border-color: var(--ink); color: #fff; }
.vd-chip.loc.on { background: var(--brand); border-color: var(--brand); }
.vd-count { font-family: Verdana, Geneva, sans-serif; font-size: 11.5px; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .1em; margin: 10px 0 6px; }
.vd-list { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--paper); }
.vd-cat { padding: 8px 16px; background: var(--brand-tint); font-family: Verdana, Geneva, sans-serif; font-size: 11.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--brand-deep); }
.vd-item { border-top: 1px solid var(--line); }
.vd-row { display: flex; align-items: center; gap: 12px; width: 100%; padding: 11px 16px; background: none; border: none; text-align: left; font: inherit; cursor: pointer; }
.vd-row:hover { background: var(--brand-tint); }
.vd-arrow { color: var(--ink-soft); transition: transform .15s; flex-shrink: 0; }
.vd-item.open .vd-arrow { transform: rotate(90deg); }
.vd-name { flex: 1; min-width: 0; font-weight: 600; color: var(--ink); font-size: 15px; }
.vd-name small { color: var(--ink-soft); font-weight: 400; white-space: nowrap; font-size: 13px; }
.vd-sup { font-size: 12px; color: var(--ink-soft); flex-shrink: 0; }
.vd-from { text-align: right; min-width: 86px; flex-shrink: 0; }
.vd-from em { display: block; font-style: normal; font-size: 10px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-soft); }
.vd-from b { font-size: 15px; }
.vd-detail { display: none; border-top: 1px solid var(--line); background: var(--paper-warm); padding: 12px 16px; }
.vd-item.open .vd-detail { display: block; }
/* neutralize the site-wide table look inside quote tables */
.vd-detail table { width: 100%; border-collapse: collapse; font-size: 13px; background: transparent; border: none; border-radius: 0; margin: 0; }
.vd-detail th { text-align: left; font-size: 10.5px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-soft); padding: 6px 8px; border-bottom: 1px solid var(--line); background: transparent; font-weight: 700; }
.vd-detail td { padding: 7px 8px; border-bottom: 1px solid var(--line); color: var(--ink-soft); vertical-align: top; }
.vd-detail tr:last-child td { border-bottom: none; }
.vd-detail td.p { text-align: right; font-weight: 700; color: var(--ink); white-space: nowrap; }
.vd-detail .none { color: var(--ink-soft); font-size: 13px; padding: 8px 0; }
.vd-vendor { border: 1px solid var(--line); border-radius: 10px; background: var(--paper); padding: 16px 18px; }
.vd-vendor h3 { font-size: 16px; margin-bottom: 2px; }
.vd-vendor .loc { font-family: Verdana, Geneva, sans-serif; font-size: 12px; color: var(--brand-deep); font-weight: 700; text-transform: uppercase; letter-spacing: .05em; margin-bottom: 8px; }
.vd-vendor p { font-size: 13.5px; color: var(--ink-soft); margin-bottom: 8px; }
.vd-vendor .contact { font-size: 13px; display: flex; flex-wrap: wrap; gap: 10px; color: var(--ink-soft); }
/* WhatsApp elements (tab bar icon + vendor card footer) */
.vd-tab.wa { display: inline-flex; align-items: center; gap: 7px; color: #25d366; border-color: #25d366; text-decoration: none; font-size: 13px; padding: 8px 14px; font-weight: 700; }
.vd-tab.wa:hover { background: #25d366; color: #fff; text-decoration: none; }
.vd-vfoot { display: flex; align-items: center; justify-content: space-between; gap: 10px; border-top: 1px solid var(--line); margin-top: 12px; padding-top: 12px; }
.vd-vfoot .vpl { font-size: 12px; font-weight: 600; color: var(--ink); text-decoration: none; white-space: nowrap; }
.vd-vfoot .vpl:hover { color: var(--brand-deep); }
.vd-vfoot .vd-wa { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 700; color: #25d366; text-decoration: none; white-space: nowrap; }
.vd-vfoot .vd-wa:hover { text-decoration: underline; }
/* vendor filter bar (View price list linkage) */
.vd-vbar { display: flex; align-items: center; gap: 10px; background: var(--brand-tint); border: 1px solid var(--brand); border-radius: 8px; padding: 8px 14px; font-size: 13px; color: var(--ink-soft); margin: 0 0 12px; flex-wrap: wrap; }
.vd-vbar b { color: var(--brand-deep); }
.vd-vbar-x { border: none; background: var(--ink); color: #fff; border-radius: 5px; padding: 3px 10px; font-family: Verdana, Geneva, sans-serif; font-size: 11px; font-weight: 700; cursor: pointer; margin-left: auto; }
.vd-vbar-x:hover { background: var(--brand-deep); }
/* quote table WhatsApp column */
.vd-detail th.wac, .vd-detail td.wac { text-align: center; white-space: nowrap; }
.vd-detail td.wac a { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; border-radius: 6px; color: #25d366; background: rgba(37,211,102,.1); transition: background .15s; }
.vd-detail td.wac a:hover { background: #25d366; color: #fff; }
/* prose + sidebar layout under the directory */
.cols { display: grid; grid-template-columns: minmax(0,1fr) 300px; gap: 32px; align-items: start; margin-top: 24px; }
.prose h3 { font-size: 17px; margin: 20px 0 8px; }
.prose p { margin: 0 0 14px; color: var(--ink-soft); }
aside .side-box { background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin-bottom: 16px; }
aside .side-box h4 { font-family: Verdana, Geneva, sans-serif; font-size: 14px; margin-bottom: 10px; letter-spacing: .2px; }
aside .side-box ul { list-style: none; font-size: 13.5px; padding-left: 0; margin: 0; }
aside .side-box li { margin-bottom: 7px; padding-left: 14px; position: relative; }
aside .side-box li::before { content: ""; position: absolute; left: 0; top: 9px; width: 5px; height: 5px; border-radius: 50%; background: var(--brand); }
.wa-cta { background: linear-gradient(135deg, var(--brand-deep), var(--brand)); color: #fff; border-radius: 10px; padding: 18px; margin-bottom: 16px; }
.wa-cta h4 { font-size: 15px; margin-bottom: 6px; color: #fff; }
.wa-cta p { font-size: 13px; opacity: .92; margin-bottom: 12px; }
.wa-cta a { display: inline-block; background: #fff; color: var(--brand-deep); font-weight: 700; font-size: 14px; padding: 9px 16px; border-radius: 8px; font-family: Verdana, Geneva, sans-serif; }
.wa-cta a:hover { text-decoration: none; background: var(--brand-tint); }
.author-box { display: flex; gap: 14px; background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin: 24px 0; font-size: 13.5px; }
.author-box .avatar { width: 46px; height: 46px; flex: 0 0 46px; border-radius: 50%; background: var(--brand-tint); color: var(--brand-deep); display: flex; align-items: center; justify-content: center; font-family: Verdana, Geneva, sans-serif; font-weight: 800; font-size: 15px; }
.author-box b { display: block; font-size: 14px; }
.author-box .role { color: var(--ink-soft); font-size: 12px; }
.updated-line { font-size: 12.5px; color: var(--ink-soft); margin-top: 14px; }
.cols { grid-template-columns: minmax(0,1fr); }
.vd-sup { display: none; }
.vd-name small { display: none; }
.vd-detail { overflow-x: visible; }
.vd-detail table { font-size: 11px; }
.vd-detail th { padding: 6px 5px; font-size: 9px; white-space: normal; }
.vd-detail td { padding: 6px 5px; overflow-wrap: anywhere; word-break: break-word; }
.vd-detail td.p { white-space: normal; }
.vd-detail td.wac a { width: 24px; height: 24px; }
.vd-tab.wa span { display: none; }