/* hypochlorousacid.net — editorial comparison. Distinct from disinfectant.org (navy/teal), hypochlorous.com (pine/copper) and electrolyzedwater.com (slate/brass). */
:root{
  --bone:#F6F1E8; --paper:#EFE8DC; --card:#FFFBF4; --ink:#1A1714;
  --muted:#5C564E; --line:#D8D0C4; --charcoal:#2A2622; --charcoal-900:#141210;
  --vermilion:#C23A2B; --vermilion-700:#9B2B20; --vermilion-50:#F8EBE8;
  --warn:#8A3B12; --warn-50:#F8EDE3;
  --radius:0; --shadow:0 1px 0 rgba(26,23,20,.04);
  --font-head:"Newsreader",Georgia,"Times New Roman",serif;
  --font-body:"Public Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --max:1080px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font-body);color:var(--ink);background:var(--bone);font-size:17px;line-height:1.65}
img,svg{max-width:100%;display:block}
a{color:var(--vermilion-700);text-underline-offset:3px}
a:hover{color:var(--vermilion)}
h1,h2,h3,h4{font-family:var(--font-head);color:var(--charcoal);line-height:1.18;letter-spacing:-.02em;margin:0 0 .5em;font-weight:600}
h1{font-size:clamp(2.15rem,5vw,3.4rem);font-weight:600;letter-spacing:-.03em}
h2{font-size:clamp(1.45rem,2.6vw,1.95rem)}
h3{font-size:1.15rem;font-weight:600}
p{margin:0 0 1em}
:focus-visible{outline:2px solid var(--vermilion);outline-offset:2px}
.skip{position:absolute;left:-999px;top:8px;background:var(--charcoal);color:#fff;padding:8px 14px;z-index:100}
.skip:focus{left:12px}
.sr-only{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section.soft{background:var(--paper)}
.eyebrow{display:inline-block;font:600 .72rem/1 var(--font-body);text-transform:uppercase;letter-spacing:.16em;color:var(--vermilion-700);margin-bottom:14px}
.lead{font-size:1.14rem;color:var(--muted);max-width:680px}
.section-head{max-width:720px;margin-bottom:36px}

/* buttons — sharp corners, not pills */
.btn{display:inline-flex;align-items:center;gap:8px;font:600 .9rem/1 var(--font-body);padding:12px 18px;border-radius:0;text-decoration:none;border:1px solid transparent;cursor:pointer;transition:.15s;background:none;color:inherit}
.btn-primary{background:var(--charcoal);color:#fff;border-color:var(--charcoal)}
.btn-primary:hover{background:var(--charcoal-900);border-color:var(--charcoal-900);color:#fff}
.btn-ghost{border-color:var(--line);color:var(--charcoal);background:transparent}
.btn-ghost:hover{border-color:var(--charcoal);color:var(--charcoal)}
.btn-sm{padding:8px 14px;font-size:.84rem}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(246,241,232,.94);backdrop-filter:saturate(1.05) blur(10px);border-bottom:1px solid var(--line);border-top:2px solid var(--vermilion)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px;gap:20px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font:600 1.02rem/1 var(--font-head);color:var(--charcoal);letter-spacing:-.03em}
.brand svg{width:24px;height:26px}
.brand span{color:var(--vermilion);font-weight:500}
.nav-links{display:flex;align-items:center;gap:0;list-style:none;margin:0;padding:0}
.nav-links a{display:block;padding:8px 11px;color:var(--ink);text-decoration:none;font-weight:500;font-size:.88rem}
.nav-links a:hover,.nav-links a[aria-current=page]{color:var(--vermilion-700);box-shadow:inset 0 -2px 0 var(--vermilion)}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:0;width:42px;height:42px;cursor:pointer;color:var(--charcoal)}
.menu-btn svg{width:22px;height:22px;margin:auto}
@media (max-width:980px){
  .menu-btn{display:grid;place-items:center}
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--bone);border-bottom:1px solid var(--line);padding:10px 16px 18px}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px}
  .nav-links a:hover,.nav-links a[aria-current=page]{box-shadow:inset 3px 0 0 var(--vermilion);background:var(--paper)}
}

/* hero */
.hero{position:relative;padding:84px 0 56px}
.hero-grid{display:grid;grid-template-columns:1fr;gap:48px;align-items:start}
.hero h1{max-width:18ch}
.hero .lead{font-size:1.16rem;margin-bottom:26px}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap}
@media (max-width:920px){.hero{padding:52px 0 40px}}

/* two-column comparison module */
.compare{display:grid;grid-template-columns:1fr 1px 1fr;gap:0 32px;background:var(--card);border:1px solid var(--line);padding:28px 32px;margin:0 0 1.6em;align-items:start}
.compare-rule{background:var(--vermilion);width:1px;align-self:stretch}
.compare-kicker{font-family:var(--font-head);font-size:1.45rem;font-weight:600;letter-spacing:-.02em;margin:0 0 22px;color:var(--charcoal)}
.compare-item{margin:0 0 22px}
.compare-item:last-child{margin-bottom:0}
.compare-label{font:600 .7rem/1 var(--font-body);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 8px}
.compare-item p{margin:0;font-size:1.05rem;color:var(--ink);max-width:none}
.compare-note{grid-column:1 / -1;margin:18px 0 0;padding-top:14px;border-top:1px solid var(--line);font-size:.86rem;color:var(--muted)}
@media (max-width:700px){
  .compare{grid-template-columns:1fr;gap:0;padding:22px 20px}
  .compare-rule{width:100%;height:1px;margin:8px 0 20px}
  .compare-col.bleach .compare-kicker{margin-top:4px}
}

/* markdown compare tables (HOCl | Bleach, or label | HOCl | Bleach) */
.prose table,.prose-sans table{width:100%;border-collapse:collapse;font-family:var(--font-body);font-size:.98rem;margin:0 0 1.6em;background:var(--card);border:1px solid var(--line)}
.prose th,.prose td,.prose-sans th,.prose-sans td{padding:12px 18px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
.prose thead th,.prose-sans thead th{font-family:var(--font-head);font-size:1.15rem;font-weight:600;color:var(--charcoal);background:transparent;border-bottom:1px solid var(--vermilion)}
.prose tbody th,.prose-sans tbody th{font:600 .72rem/1.3 var(--font-body);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);width:24%;background:var(--paper)}
.prose tr:last-child th,.prose tr:last-child td,.prose-sans tr:last-child th,.prose-sans tr:last-child td{border-bottom:0}

/* cards & grids */
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}
@media (max-width:980px){.g3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g2,.g3{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:0;padding:22px 22px 20px}
.card h3,.card h2{margin-bottom:.4em}
.card p:last-child{margin-bottom:0}
.icon{width:40px;height:40px;display:grid;place-items:center;background:var(--paper);color:var(--charcoal);margin-bottom:14px;border-left:2px solid var(--vermilion)}
.icon svg{width:22px;height:22px}
.path-card{text-decoration:none;color:inherit;transition:border-color .15s;border-left:2px solid transparent}
.path-card:hover{border-left-color:var(--vermilion);color:inherit}
.path-card p{color:var(--muted);margin:0}

/* post cards */
.post-card{display:grid;grid-template-columns:72px 1fr;gap:16px;background:var(--card);border:1px solid var(--line);padding:16px;text-decoration:none;color:inherit}
.post-card:hover{border-color:var(--vermilion);color:inherit}
.post-card.featured{grid-column:1/-1;grid-template-columns:120px 1fr;padding:20px}
.thumb{display:grid;place-items:center;background:var(--paper);color:var(--charcoal);border-left:2px solid var(--vermilion)}
.thumb svg{width:30px;height:30px}
.post-body .cat{font:600 .7rem/1 var(--font-body);letter-spacing:.1em;text-transform:uppercase;color:var(--vermilion-700);margin-bottom:8px}
.post-body h3{margin:0 0 .35em;font-size:1.2rem}
.post-body p{margin:0 0 .55em;color:var(--muted);font-size:.94rem}
.post-body .meta{display:flex;flex-wrap:wrap;gap:6px 8px;font-size:.8rem;color:var(--muted)}
.draft-badge{display:inline-block;margin-left:8px;padding:1px 7px;background:var(--warn-50);color:var(--warn);font-size:.68rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;vertical-align:middle}
.draft-banner{background:var(--warn-50);color:#7C2D12;border-bottom:1px solid #E8C48A;padding:10px 0;font-size:.9rem;text-align:center}
@media (max-width:640px){.post-card,.post-card.featured{grid-template-columns:1fr}.thumb{height:64px}}

/* page hero, crumbs, articles */
.page-hero{padding:44px 0 10px}
.crumbs{font-size:.84rem;color:var(--muted);margin-bottom:12px}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--vermilion-700)}
.article-hero{padding:32px 0 8px}
.article-hero .cat{font:600 .72rem/1 var(--font-body);letter-spacing:.12em;text-transform:uppercase;color:var(--vermilion-700);margin-bottom:12px}
.article-layout{display:grid;grid-template-columns:200px 1fr;gap:44px;max-width:var(--max);margin:0 auto;padding:24px 24px 64px}
@media (max-width:900px){.article-layout{grid-template-columns:1fr;gap:18px}}
.toc{position:sticky;top:88px;align-self:start;font-size:.88rem}
.toc h2{font-family:var(--font-body);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 10px;font-weight:600}
.toc ol{margin:0;padding:0 0 0 1.1em}
.toc a{color:var(--muted);text-decoration:none}
.toc a:hover,.toc a.active{color:var(--charcoal)}
.byline{display:flex;flex-wrap:wrap;align-items:center;gap:12px 18px;margin:20px 0 0;color:var(--muted);font-size:.9rem}
.byline strong{display:block;color:var(--charcoal);font-family:var(--font-head)}
.byline .avatar{width:40px;height:40px;background:var(--charcoal);color:#fff;display:grid;place-items:center;font:600 .7rem/1 var(--font-body);letter-spacing:.04em}
.byline .sep{width:1px;height:28px;background:var(--line)}
.byline svg{width:16px;height:16px}
.prose,.prose-sans{max-width:760px}
.prose{font-size:1.08rem;line-height:1.72}
.prose h2{margin-top:1.55em;scroll-margin-top:90px}
.prose h2:first-child{margin-top:0}
.prose ul,.prose ol{padding-left:1.2em}
.prose li{margin:.35em 0}
.prose-sans{font-family:var(--font-body)}
.prose-sans h2{scroll-margin-top:90px;margin-top:1.55em}
.prose-sans h2:first-child{margin-top:0}
.prose-sans h3{margin-top:1.2em;font-size:1.05rem}
.callout{font-size:.95rem;background:var(--paper);border-left:2px solid var(--vermilion);padding:16px 18px;margin:1.4em 0;line-height:1.55}
.note{font-size:.9rem;color:var(--muted)}

/* product / disclosure */
.product-cta{margin:8px 0 24px;padding:24px;background:var(--paper);border:1px solid var(--line)}
.product-cta h2{margin-top:0}
.store-cta.compact{font-size:.9rem;color:var(--muted);margin:16px 0 0}
.disclosure{font-size:.88rem;color:var(--muted);max-width:760px;margin:8px 0 0}
.disclosure.compact{margin-top:16px}
.article-hero .disclosure,.page-hero .disclosure{margin:14px 0 0;max-width:760px}

/* footer */
.site-footer{background:var(--charcoal-900);color:#C9C2B8;padding:52px 0 24px;margin-top:16px}
.site-footer a{color:#E8D4CE}
.site-footer a:hover{color:#fff}
.site-footer .brand{color:#fff}
.site-footer .brand span{color:#E8A399}
.site-footer .brand svg rect,.site-footer .brand svg line[stroke="#1A1714"]{stroke:#E8D4CE}
.site-footer .brand svg line[stroke="#C23A2B"]{stroke:#C23A2B}
.foot-grid{display:grid;grid-template-columns:1.3fr .9fr .9fr .8fr;gap:28px}
.foot-blurb{margin-top:14px;max-width:340px;color:#C9C2B8}
.site-footer h4{color:#fff;font-family:var(--font-body);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;margin:0 0 12px;font-weight:600}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin:0 0 8px}
.site-footer li a{text-decoration:none}
.foot-funding{margin:32px 0 0;font-size:.88rem;max-width:840px}
.foot-store{margin:16px 0 0;font-size:.9rem}
.foot-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:16px;padding-top:16px;border-top:1px solid rgba(255,255,255,.1);font-size:.82rem;color:#9A938A}
@media (max-width:800px){.foot-grid{grid-template-columns:1fr 1fr}.foot-grid>div:first-child{grid-column:1/-1}}

[hidden]{display:none!important}