/* hypochlorous.com — handbook / bench-guide design. Distinct from disinfectant.org. */
:root{
  --pine:#1F4A3A; --pine-700:#16362B; --ink:#1C1915; --muted:#5C564C; --line:#E0D6C8;
  --copper:#C56A2D; --copper-700:#8F4A21; --copper-50:#F8EDE4;
  --sage:#3E6B52; --sage-50:#E7F0EA;
  --paper:#F7F1E8; --paper-deep:#EDE6D9; --bg:#FBF7F0; --card:#FFFcf7;
  --warn:#9A4B12; --warn-50:#F8EBD8;
  --radius:16px; --radius-sm:10px;
  --shadow:0 1px 2px rgba(28,25,21,.05), 0 10px 30px rgba(31,74,58,.07);
  --font-head:"Source Serif 4",Georgia,"Times New Roman",serif;
  --font-ui:"Plus Jakarta Sans",Inter,system-ui,sans-serif;
  --font-body:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  --max:1140px;
}
*,*::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(--bg);font-size:17.5px;line-height:1.65;background-image:radial-gradient(ellipse at top,rgba(197,106,45,.05),transparent 42%),linear-gradient(180deg,var(--paper) 0,var(--bg) 280px)}
img,svg{max-width:100%;display:block}
a{color:var(--copper-700);text-underline-offset:3px}
a:hover{color:var(--copper)}
h1,h2,h3,h4{font-family:var(--font-head);color:var(--pine);line-height:1.2;letter-spacing:-.015em;margin:0 0 .5em;font-weight:600}
h1{font-size:clamp(2.2rem,5vw,3.7rem);font-weight:600;letter-spacing:-.03em}
h2{font-size:clamp(1.55rem,2.8vw,2.15rem)}
h3{font-size:1.2rem;font-family:var(--font-ui);font-weight:700}
p{margin:0 0 1em}
:focus-visible{outline:3px solid var(--copper);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-999px;top:8px;background:var(--pine);color:#fff;padding:8px 14px;border-radius:8px;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:80px 0}
.section.soft{background:var(--paper-deep)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font:700 .75rem/1 var(--font-ui);text-transform:uppercase;letter-spacing:.14em;color:var(--copper);margin-bottom:14px}
.lead{font-size:1.14rem;color:var(--muted);max-width:680px}
.section-head{max-width:720px;margin-bottom:40px}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;font:700 .95rem/1 var(--font-ui);padding:14px 22px;border-radius:999px;text-decoration:none;border:2px solid transparent;cursor:pointer;transition:.15s;background:none;color:inherit}
.btn-primary{background:var(--copper);color:#fff;border-color:var(--copper)}
.btn-primary:hover{background:var(--copper-700);border-color:var(--copper-700);color:#fff}
.btn-ghost{border-color:#D3C4B0;color:var(--pine);background:transparent}
.btn-ghost:hover{border-color:var(--pine);color:var(--pine)}
.btn-sm{padding:10px 16px;font-size:.88rem}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(251,247,240,.9);backdrop-filter:saturate(1.2) blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px;gap:20px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font:700 1.28rem/1 var(--font-head);color:var(--pine);letter-spacing:-.02em}
.brand svg{width:30px;height:34px}
.brand span{color:var(--copper);font-weight:600}
.nav-links{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0}
.nav-links a{display:block;padding:9px 12px;border-radius:8px;color:var(--ink);text-decoration:none;font-weight:600;font-size:.92rem;font-family:var(--font-ui)}
.nav-links a:hover,.nav-links a[aria-current=page]{background:var(--copper-50);color:var(--copper-700)}
.nav-cta{margin-left:8px}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:10px;width:44px;height:44px;cursor:pointer;color:var(--pine)}
.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:74px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--paper);border-bottom:1px solid var(--line);padding:10px 16px 18px;box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-links a{padding:13px 12px}
  .nav-cta{margin:8px 0 0}
  .nav-cta .btn{width:100%;justify-content:center}
}

/* hero */
.hero{position:relative;overflow:hidden;padding:88px 0 72px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.hero h1 .hl{color:var(--copper);font-style:italic}
.hero .lead{font-size:1.18rem;margin-bottom:28px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px 22px;margin:32px 0 0;padding:0;list-style:none;color:var(--muted);font-size:.93rem;font-weight:500}
.hero-badges li{display:flex;align-items:center;gap:8px}
.hero-badges svg{width:18px;height:18px;color:var(--sage);flex:none}
.bench-card{background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:28px 28px 22px;position:relative}
.bench-card::before{content:"";position:absolute;inset:10px 10px auto 10px;height:7px;border-radius:8px;background:repeating-linear-gradient(-45deg,var(--copper),var(--copper) 8px,var(--pine) 8px,var(--pine) 16px);opacity:.85}
.bench-kicker{font:700 .75rem/1 var(--font-ui);letter-spacing:.12em;text-transform:uppercase;color:var(--copper);margin:12px 0 16px}
.bench-steps{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.bench-steps li{display:grid;grid-template-columns:36px 1fr;gap:12px;align-items:start}
.bench-steps b{width:36px;height:36px;border-radius:50%;background:var(--sage-50);color:var(--pine);display:grid;place-items:center;font-family:var(--font-ui);font-size:.95rem}
.bench-note{margin:18px 0 0;font-size:.86rem;color:var(--muted)}
@media (max-width:920px){.hero-grid{grid-template-columns:1fr;gap:40px}.hero{padding:56px 0 56px}}

/* cards & grids */
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:980px){.g4,.g3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:0 1px 2px rgba(28,25,21,.04)}
.card h3,.card h2{margin-bottom:.4em}
.card p:last-child{margin-bottom:0}
.card.accent{background:var(--pine);color:#E8F0EA;border:0}
.card.accent h3{color:#fff}
.card.accent p{color:#D5E4DA}
.card.accent .btn{margin-top:8px}
.icon{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:var(--copper-50);color:var(--copper);margin-bottom:16px}
.icon svg{width:24px;height:24px}
.path-card{text-decoration:none;color:inherit;transition:transform .15s,box-shadow .15s}
.path-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);color:inherit}
.path-card p{color:var(--muted);margin:0}
.more{margin:28px 0 0}
.more a{font-family:var(--font-ui);font-weight:700}

/* post cards */
.post-card{display:grid;grid-template-columns:88px 1fr;gap:18px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;text-decoration:none;color:inherit;box-shadow:0 1px 2px rgba(28,25,21,.04)}
.post-card:hover{border-color:#D0B79A;color:inherit}
.post-card.featured{grid-column:1/-1;grid-template-columns:160px 1fr;padding:22px}
.thumb{border-radius:12px;display:grid;place-items:center;background:var(--sage-50);color:var(--pine)}
.thumb svg{width:36px;height:36px}
.t-howto{background:#F8EDE4;color:var(--copper-700)}
.t-basics{background:#E7F0EA;color:var(--pine)}
.t-gen{background:#EEE8F4;color:#4C3A6E}
.t-cost{background:#F4EFD4;color:#7A5B12}
.t-uses{background:#EDE6DC;color:#5C3D2E}
.post-body .cat{font:700 .72rem/1 var(--font-ui);letter-spacing:.08em;text-transform:uppercase;color:var(--copper);margin-bottom:8px}
.post-body h3{margin:0 0 .35em;font-size:1.22rem;font-family:var(--font-head);font-weight:600}
.post-body p{margin:0 0 .6em;color:var(--muted);font-size:.95rem}
.post-body .meta{display:flex;flex-wrap:wrap;gap:6px 8px;font-size:.82rem;color:var(--muted)}
.draft-badge{display:inline-block;margin-left:8px;padding:1px 8px;border-radius:999px;background:var(--warn-50);color:var(--warn);font-size:.72rem;font-weight:700;letter-spacing:.02em;text-transform:uppercase;vertical-align:middle}
.draft-banner{background:var(--warn-50);color:#7C2D12;border-bottom:1px solid #E8C48A;padding:10px 0;font-size:.92rem;text-align:center}
@media (max-width:640px){.post-card,.post-card.featured{grid-template-columns:1fr}.thumb{height:72px}}

/* page hero, crumbs, articles */
.page-hero{padding:48px 0 12px}
.crumbs{font-size:.88rem;color:var(--muted);margin-bottom:14px}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--copper-700)}
.article-hero{padding:36px 0 10px}
.article-hero .cat{font:700 .75rem/1 var(--font-ui);letter-spacing:.1em;text-transform:uppercase;color:var(--copper);margin-bottom:12px}
.article-layout{display:grid;grid-template-columns:220px 1fr;gap:48px;max-width:var(--max);margin:0 auto;padding:28px 24px 64px}
@media (max-width:900px){.article-layout{grid-template-columns:1fr;gap:20px}}
.toc{position:sticky;top:96px;align-self:start;font-size:.9rem}
.toc h2{font-family:var(--font-ui);font-size:.75rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0 0 10px}
.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(--pine)}
.byline{display:flex;flex-wrap:wrap;align-items:center;gap:12px 18px;margin:22px 0 0;color:var(--muted);font-size:.92rem}
.byline strong{display:block;color:var(--pine);font-family:var(--font-ui)}
.byline .avatar{width:42px;height:42px;border-radius:50%;background:var(--pine);color:#fff;display:grid;place-items:center;font:700 .8rem/1 var(--font-ui)}
.byline .sep{width:1px;height:28px;background:var(--line)}
.byline svg{width:16px;height:16px}
.prose,.prose-sans{max-width:760px}
.prose{font-family:var(--font-head);font-size:1.12rem;line-height:1.7}
.prose h2{margin-top:1.6em;scroll-margin-top:96px}
.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:96px;margin-top:1.6em}
.prose-sans h2:first-child{margin-top:0}
.prose-sans h3{margin-top:1.2em;font-size:1.05rem}

/* compare */
.method{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:22px 26px;margin:0 0 28px}
.method h2{margin-top:0}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--card);box-shadow:var(--shadow)}
.compare-table{width:100%;border-collapse:collapse;font-size:.94rem;min-width:760px}
.compare-table th,.compare-table td{border-bottom:1px solid var(--line);padding:14px 16px;text-align:left;vertical-align:top}
.compare-table thead th{background:var(--paper-deep);font-family:var(--font-ui);color:var(--pine);font-size:.95rem}
.compare-table tbody th{font-family:var(--font-ui);font-weight:700;color:var(--pine);width:20%;background:var(--card)}
.compare-table .hl-col{background:#F8EFE6}
.compare-table thead .hl-col{background:#F0E0D0}
.th-note{display:block;font:600 .68rem/1.2 var(--font-body);color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-top:4px}
.scroll-hint{display:none;font-size:.85rem;color:var(--muted);margin:0 0 10px}
@media (max-width:800px){.scroll-hint{display:block}}
.gaps{margin:36px 0 48px}
.gaps ul{padding-left:1.2em}
.gaps li{margin:.5em 0}

/* calculator */
.cost-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:36px;align-items:start}
@media (max-width:900px){.cost-layout{grid-template-columns:1fr}}
.cost-calc{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:28px;box-shadow:var(--shadow)}
.cost-calc fieldset{border:0;margin:0 0 22px;padding:0}
.cost-calc legend{font-family:var(--font-head);color:var(--pine);font-size:1.25rem;margin-bottom:14px;padding:0}
.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:640px){.calc-grid{grid-template-columns:1fr}}
.cost-calc label{display:grid;gap:6px;font:600 .86rem/1.3 var(--font-ui);color:var(--pine)}
.cost-calc input,.cost-calc select{font:400 1rem/1.4 var(--font-body);padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);width:100%}
.cost-calc input:focus,.cost-calc select:focus{border-color:var(--copper);outline:none;box-shadow:0 0 0 3px rgba(197,106,45,.2)}
.split{display:grid;grid-template-columns:1fr 9rem;gap:8px}
.hint{font:400 .8rem/1.4 var(--font-body);color:var(--muted)}
.pending-note{background:var(--warn-50);border:1px solid #E8C48A;border-radius:12px;padding:14px 16px;color:#7C2D12;font-size:.92rem;margin:0 0 22px}
.calc-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}
.calc-results{margin-top:24px;padding-top:20px;border-top:1px solid var(--line)}
.calc-results dl{display:grid;gap:0;margin:0}
.calc-results dl>div{display:grid;grid-template-columns:1.2fr .8fr;gap:12px;padding:10px 0;border-bottom:1px solid var(--line)}
.calc-results dt{color:var(--muted)}
.calc-results dd{margin:0;font-weight:700;color:var(--pine);text-align:right}
.calc-compare{margin:16px 0 0;padding:12px 14px;background:var(--sage-50);border-radius:10px;color:var(--pine)}
.footnote{font-size:.88rem;color:var(--muted);margin-top:18px}
.cost-layout .card ul{padding-left:1.15em}

/* product CTA + disclosure */
.product-cta{margin:8px 0 24px;padding:28px;background:var(--paper);border:1px solid var(--line);border-radius:20px}
.product-cta h2{margin-top:0}
.cta-grid{display:grid;gap:16px}
.cta-grid.multi{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.cta-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.cta-card p{color:var(--muted)}
.disclosure{font-size:.9rem;color:var(--muted);max-width:760px;margin:8px 0 0}
.disclosure.compact{margin-top:16px}

/* listing toolbar */
.blog-layout{display:grid;grid-template-columns:1fr 280px;gap:36px;align-items:start}
@media (max-width:900px){.blog-layout{grid-template-columns:1fr}}
.toolbar{margin-bottom:16px}
.search{position:relative}
.search svg{position:absolute;left:12px;top:50%;width:18px;height:18px;transform:translateY(-50%);color:var(--muted)}
.search input{width:100%;padding:12px 12px 12px 40px;border:1px solid var(--line);border-radius:12px;font:400 1rem/1.3 var(--font-body);background:var(--card)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 22px}
.chip{font:700 .8rem/1 var(--font-ui);padding:8px 12px;border-radius:999px;border:1px solid var(--line);background:var(--card);color:var(--ink);cursor:pointer}
.chip[aria-pressed=true]{background:var(--pine);color:#fff;border-color:var(--pine)}
.cat-list,.cat-list ul{list-style:none;margin:0;padding:0}
.cat-list a{display:flex;justify-content:space-between;text-decoration:none;padding:8px 0;color:var(--ink);border-bottom:1px solid var(--line);font-weight:600}
.cat-list .count{color:var(--muted);font-weight:500}
.empty{display:none;color:var(--muted)}
.empty.show{display:block}

/* footer */
.site-footer{background:var(--pine);color:#D5E4DA;padding:56px 0 28px;margin-top:20px}
.site-footer a{color:#F0D2B8}
.site-footer a:hover{color:#fff}
.site-footer .brand{color:#fff}
.site-footer .brand span{color:#E8B58A}
.foot-grid{display:grid;grid-template-columns:1.3fr .8fr .8fr .8fr;gap:32px}
.foot-blurb{margin-top:16px;max-width:340px;color:#D5E4DA}
.site-footer h4{color:#fff;font-family:var(--font-ui);font-size:.85rem;letter-spacing:.08em;text-transform:uppercase;margin:0 0 12px}
.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:36px 0 0;font-size:.9rem;max-width:820px}
.foot-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:18px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:.85rem;color:#B7C9BE}
@media (max-width:800px){.foot-grid{grid-template-columns:1fr 1fr}.foot-grid>div:first-child{grid-column:1/-1}}

[hidden]{display:none!important}

@media (max-width:700px){
  .table-wrap{overflow:visible;border:0;box-shadow:none;background:transparent}
  .compare-table{min-width:0}
  .compare-table thead{position:absolute;left:-9999px}
  .compare-table,.compare-table tbody,.compare-table tr,.compare-table th,.compare-table td{display:block;width:auto}
  .compare-table tbody tr{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);margin-bottom:16px;padding:6px 14px 10px;box-shadow:0 1px 2px rgba(28,25,21,.04)}
  .compare-table tbody th{width:auto;background:transparent;border:0;padding:12px 0 6px;font-size:1.05rem}
  .compare-table td{border:0;padding:8px 0;display:grid;grid-template-columns:110px 1fr;gap:8px;background:transparent!important}
  .compare-table td::before{content:attr(data-label);font:700 .75rem/1.4 var(--font-ui);color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
  .scroll-hint{display:none}
}

.article-hero .disclosure,.page-hero .disclosure{margin:14px 0 0;max-width:760px}
.article-hero .disclosure + .lead,.page-hero .disclosure + .lead{margin-top:16px}

.prose .product-photo,.prose .product-photos{margin:0 0 1.5em}
.prose .product-photos{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.prose .product-photo{margin:0}
.prose .product-photo img{width:100%;height:auto;border-radius:14px;background:#fff;border:1px solid var(--line)}
.prose .product-photo figcaption{font-family:var(--font-body);font-size:.86rem;color:var(--muted);margin-top:8px}
@media (max-width:640px){.prose .product-photos{grid-template-columns:1fr}}