/* ============================================================
   Is My Tap Safe — shared stylesheet
   Every page links this. Page-specific rules stay in the page.
   ============================================================ */

:root{
  --ground:#F4F7F8; --surface:#FFFFFF; --raised:#FAFCFC;
  --ink:#0E1C24; --ink-2:#31434C; --muted:#687A81;
  --line:#DBE4E7; --line-2:#EBF1F2;
  --accent:#0B6480; --accent-wash:#E6F0F4;
  --safe:#186B4D; --safe-wash:#E4F0EA;
  --caution:#8A5F0A; --caution-wash:#F7EFDC;
  --alert:#A62E1A; --alert-wash:#F8E6E1;
  --focus:#0B6480;
  --btn-ink:#FFFFFF;
  --shadow:0 1px 2px rgba(14,28,36,.06),0 6px 20px rgba(14,28,36,.05);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --ground:#0C1417; --surface:#131E22; --raised:#182429;
    --ink:#E8EFF0; --ink-2:#BCCACE; --muted:#87989D;
    --line:#26363B; --line-2:#1D2B30;
    --accent:#4FB4D3; --accent-wash:#122E38;
    --safe:#5BC095; --safe-wash:#112A22;
    --caution:#D9A73F; --caution-wash:#2C2314;
    --alert:#E97B62; --alert-wash:#331913;
    --focus:#4FB4D3;
    --btn-ink:#08222B;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 6px 20px rgba(0,0,0,.28);
  }
}
:root[data-theme="dark"]{
  --ground:#0C1417; --surface:#131E22; --raised:#182429;
  --ink:#E8EFF0; --ink-2:#BCCACE; --muted:#87989D;
  --line:#26363B; --line-2:#1D2B30;
  --accent:#4FB4D3; --accent-wash:#122E38;
  --safe:#5BC095; --safe-wash:#112A22;
  --caution:#D9A73F; --caution-wash:#2C2314;
  --alert:#E97B62; --alert-wash:#331913;
  --focus:#4FB4D3;
  --btn-ink:#08222B;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 6px 20px rgba(0,0,0,.28);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--ground);color:var(--ink);
  font-family:"Public Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.62;-webkit-font-smoothing:antialiased;
  display:flex;flex-direction:column;min-height:100vh;
}
main{flex:1 0 auto}
:focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:3px}
.wrap{max-width:780px;margin:0 auto;padding-inline:20px;width:100%}
.wrap.narrow{max-width:720px}
a{color:var(--accent);text-underline-offset:2px}
img{max-width:100%}
.skip{position:absolute;left:-9999px}
.skip:focus{left:8px;top:8px;background:var(--surface);padding:8px 14px;border-radius:6px;z-index:9}

/* ---------------------------------------------------- header --- */
.topbar{border-bottom:1px solid var(--line);background:var(--surface)}
.topbar .wrap{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding-block:14px;flex-wrap:wrap;
}
.brand{
  display:flex;align-items:center;gap:9px;font-weight:700;
  letter-spacing:-.015em;font-size:1.04rem;color:var(--ink);text-decoration:none;
}
.brand svg{flex:none}
.brand .q{color:var(--accent);margin-left:1px}
.vintage{
  font-family:"IBM Plex Mono",ui-monospace,monospace;
  font-size:11px;letter-spacing:.04em;color:var(--muted);
}

/* ------------------------------------------------- typography --- */
h1{
  font-family:"Source Serif 4",Georgia,serif;font-weight:600;
  font-size:clamp(1.95rem,5.4vw,2.7rem);line-height:1.12;
  letter-spacing:-.022em;margin:0 0 16px;text-wrap:balance;
}
h2{
  font-family:"Source Serif 4",Georgia,serif;font-weight:600;
  font-size:clamp(1.34rem,3.4vw,1.68rem);line-height:1.25;
  letter-spacing:-.016em;margin:40px 0 13px;text-wrap:balance;
}
h3{font-size:1.04rem;font-weight:700;margin:28px 0 8px;letter-spacing:-.008em}
p{margin:0 0 17px}
ul,ol{margin:0 0 17px;padding-left:22px}
li{margin-bottom:8px}
strong{font-weight:600}
.eyebrow{
  font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:11px;
  letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin:0 0 13px;
}
.standfirst{
  font-size:1.12rem;line-height:1.55;color:var(--ink-2);
  margin:0 0 22px;text-wrap:pretty;
}
.pagehead{padding-block:46px 0}
.pagehead .standfirst{margin-bottom:0}
.pagehead + section,.pagehead + .body{margin-top:8px}
.body{padding-block:10px 20px}
.body.tight{max-width:66ch}
.updated{
  font-size:.83rem;color:var(--muted);padding-bottom:24px;
  border-bottom:1px solid var(--line);margin-bottom:30px;
}

/* ------------------------------------------------------ boxes --- */
.note{
  background:var(--surface);border:1px solid var(--line);
  border-left:3px solid var(--accent);border-radius:0 8px 8px 0;
  padding:20px 22px;margin:26px 0;
}
.note h3{margin:0 0 7px;font-size:1rem}
.note p{margin:0 0 12px;font-size:.96rem}
.note p:last-child{margin:0}
.note.warn{border-left-color:var(--caution);background:var(--caution-wash)}
.note.warn h3{color:var(--caution)}

.cta{background:var(--accent-wash);border-radius:8px;padding:22px 24px;margin:32px 0;text-align:center}
.cta p{margin:0 0 14px;font-size:1rem;font-weight:600}
.btn{
  display:inline-block;background:var(--accent);color:var(--btn-ink);
  text-decoration:none;font-weight:600;padding:11px 26px;border-radius:7px;font-size:.96rem;
}
.btn:hover{filter:brightness(1.08)}

/* ------------------------------------------------------ table --- */
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:var(--surface);margin:24px 0}
table{border-collapse:collapse;width:100%;min-width:420px;font-size:.92rem}
th{
  font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:10px;
  letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:400;
  text-align:left;padding:13px 16px 9px;border-bottom:1px solid var(--line);white-space:nowrap;
}
td{padding:11px 16px;border-bottom:1px solid var(--line-2);color:var(--ink-2);vertical-align:top}
tr:last-child td{border-bottom:none}
td:first-child{color:var(--ink);font-weight:500}
td.n{font-family:"IBM Plex Mono",ui-monospace,monospace;font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap}
figure{margin:28px 0}
figcaption{font-size:.83rem;color:var(--muted);margin-top:10px;line-height:1.5}
.barcell{width:36%;min-width:104px}
.b{display:block;height:7px;background:var(--accent);border-radius:2px;min-width:2px}
.b.hot{background:var(--alert)}

/* ----------------------------------------------------- footer --- */
.sitefoot{
  border-top:1px solid var(--line);background:var(--surface);
  margin-top:40px;flex:none;
}
.footnav{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:28px 24px;padding-block:38px 30px;
}
.footcol h4{
  font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:10.5px;
  letter-spacing:.12em;text-transform:uppercase;color:var(--muted);
  font-weight:400;margin:0 0 12px;
}
.footcol ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.footcol li{margin:0}
.footcol a{
  color:var(--ink-2);text-decoration:none;font-size:.92rem;
  border-bottom:1px solid transparent;
}
.footcol a:hover{color:var(--accent);border-bottom-color:var(--accent)}
.footcol a[aria-current="page"]{color:var(--accent);font-weight:600}
/* footer knowledge panel */
.basics{border-bottom:1px solid var(--line-2)}
.basics summary{
  cursor:pointer;list-style:none;padding-block:20px;
  display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;position:relative;
  padding-right:30px;
}
.basics summary::-webkit-details-marker{display:none}
.basics summary span{font-weight:700;font-size:1rem;letter-spacing:-.008em}
.basics summary small{font-size:.86rem;color:var(--muted)}
.basics summary::after{
  content:"";position:absolute;right:6px;top:29px;width:8px;height:8px;
  border-right:1.8px solid var(--muted);border-bottom:1.8px solid var(--muted);
  transform:rotate(45deg);transition:transform .16s ease;
}
.basics[open] summary::after{transform:rotate(225deg);top:32px}
.basics summary:hover span{color:var(--accent)}
.basicgrid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(252px,1fr));
  gap:24px 32px;padding-block:6px 30px;
}
.basic h4{
  margin:0 0 6px;font-size:.93rem;font-weight:700;color:var(--ink);letter-spacing:-.006em;
}
.basic p{margin:0;font-size:.88rem;line-height:1.58;color:var(--muted)}
.basic em{font-style:normal;color:var(--ink-2);font-weight:600}

.footbase{
  border-top:1px solid var(--line-2);padding-block:22px 34px;
  font-size:.83rem;color:var(--muted);
}
.footbase p{margin:0 0 7px;max-width:74ch}
.footbase p:last-child{margin:0}
.footbase strong{color:var(--ink-2)}

/* -------------------------------------------------- article ----- */
.crumbs{
  display:flex;flex-wrap:wrap;gap:8px;align-items:center;
  padding-top:24px;font-size:.82rem;color:var(--muted);
}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--accent);text-decoration:underline}
.crumbs i{font-style:normal;opacity:.5}
article{padding-block:22px 20px}
article h1{font-size:clamp(2rem,5.4vw,2.7rem);font-weight:700;margin-top:14px}
.byline{
  display:flex;flex-wrap:wrap;gap:6px 16px;font-size:.84rem;color:var(--muted);
  padding-bottom:24px;border-bottom:1px solid var(--line);margin-bottom:30px;
}
.answer{
  background:var(--surface);border:1px solid var(--line);
  border-left:3px solid var(--accent);border-radius:0 8px 8px 0;
  padding:21px 23px;margin:0 0 28px;
}
.answer p{margin:0 0 13px;font-size:1.01rem}
.answer p:last-child{margin:0}
.answer b{color:var(--ink);font-weight:600}
article ul li,article ol li{color:var(--ink-2)}
article ul li strong,article ol li strong{color:var(--ink)}

.related{margin-top:46px;padding-top:26px;border-top:1px solid var(--line)}
.related h2{margin:0 0 16px;font-size:1.06rem;font-family:"Public Sans",sans-serif;font-weight:700;letter-spacing:0}
.relgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(196px,1fr));gap:12px}
.relcard{
  display:flex;flex-direction:column;gap:5px;text-decoration:none;color:inherit;
  background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:15px 16px;
}
.relcard:hover{border-color:var(--accent)}
.relcard .cat{
  font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:9.5px;
  letter-spacing:.11em;text-transform:uppercase;color:var(--accent);
}
.relcard strong{font-size:.94rem;font-weight:600;line-height:1.35;letter-spacing:-.006em}
.relcard:hover strong{color:var(--accent)}
.relcard .meta{font-size:.78rem;color:var(--muted)}

/* ----------------------------------------------------- blog ----- */
.blogsec{margin-top:44px}
.blogsec h2{
  margin:0 0 4px;padding-top:24px;border-top:1px solid var(--line);
  font-size:1.3rem;
}
/* One card, used for every post on the blog. No exceptions, including the
   pillar -- it is distinguished by a tag, not by a different box. */
.postgrid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(296px,1fr));
  gap:14px;margin-top:20px;align-items:stretch;
}
.post{
  display:flex;flex-direction:column;gap:7px;text-decoration:none;color:inherit;
  background:var(--surface);border:1px solid var(--line);border-radius:10px;
  padding:20px 22px;
}
.post:hover{border-color:var(--accent)}
.post:hover h3{color:var(--accent)}
.post .cat{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:10px;
  letter-spacing:.11em;text-transform:uppercase;color:var(--accent);
}
.post .tag{
  background:var(--accent-wash);color:var(--accent);
  padding:2px 7px;border-radius:3px;letter-spacing:.08em;
}
.post h3{
  font-family:"Source Serif 4",Georgia,serif;font-weight:600;font-size:1.19rem;
  letter-spacing:-.014em;margin:0;line-height:1.26;text-wrap:balance;
}
.post p{margin:0;font-size:.93rem;color:var(--ink-2);line-height:1.55;flex:1 0 auto}
.post .meta{font-size:.8rem;color:var(--muted);margin-top:3px}

/* editorial plan */
.sectionrule{
  margin-top:52px;padding-top:26px;border-top:1px solid var(--line);
}
.sectionnote{font-size:.95rem;color:var(--muted);max-width:64ch;margin-bottom:0}
.topicgrid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(268px,1fr));
  gap:1px;background:var(--line);border:1px solid var(--line);
  border-radius:10px;overflow:hidden;margin-top:26px;
}
.topic{background:var(--surface);padding:22px 24px}
.topic h3{
  margin:0 0 5px;font-size:1rem;font-weight:700;letter-spacing:-.008em;
}
.topic > p{margin:0 0 13px;font-size:.87rem;color:var(--muted);line-height:1.5}
.topic ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.topic li{
  margin:0;font-size:.92rem;color:var(--ink-2);padding-left:16px;
  position:relative;line-height:1.45;
}
.topic li::before{
  content:"";position:absolute;left:0;top:.6em;width:6px;height:1px;background:var(--accent);
}

/* ----------------------------------------------------- faq ------ */
.faq{margin-top:26px;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  cursor:pointer;padding:17px 34px 17px 0;position:relative;
  font-weight:600;font-size:1rem;list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";position:absolute;right:6px;top:50%;width:9px;height:9px;
  border-right:1.8px solid var(--muted);border-bottom:1.8px solid var(--muted);
  transform:translateY(-70%) rotate(45deg);transition:transform .16s ease;
}
.faq details[open] summary::after{transform:translateY(-30%) rotate(225deg)}
.faq summary:hover{color:var(--accent)}
.faq .a{padding:0 0 20px;color:var(--ink-2);font-size:.96rem}
.faq .a p:last-child{margin:0}

/* -------------------------------------------------- glossary ---- */
.jump{
  display:flex;flex-wrap:wrap;gap:6px;margin:22px 0 8px;
  padding-bottom:22px;border-bottom:1px solid var(--line);
}
.jump a{
  font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:.82rem;
  text-decoration:none;padding:4px 10px;border:1px solid var(--line);
  border-radius:5px;background:var(--surface);color:var(--ink-2);
}
.jump a:hover{border-color:var(--accent);color:var(--accent)}
.gloss{margin:0}
.gloss dt{
  font-weight:700;font-size:1rem;margin:26px 0 5px;scroll-margin-top:16px;
}
.gloss dt span{
  font-family:"IBM Plex Mono",ui-monospace,monospace;font-weight:400;
  font-size:.8rem;color:var(--muted);margin-left:8px;letter-spacing:.03em;
}
.gloss dd{margin:0;color:var(--ink-2);font-size:.96rem;max-width:68ch}
.gsec{
  font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:11px;
  letter-spacing:.12em;text-transform:uppercase;color:var(--accent);
  margin:40px 0 0;padding-top:24px;border-top:1px solid var(--line);
}
/* the jump bar already draws a rule, so the first section must not add one */
.jump + .gsec{margin-top:20px;padding-top:0;border-top:none}

/* ---------------------------------------------------- sources --- */
.sources{margin-top:46px;padding-top:24px;border-top:1px solid var(--line);font-size:.85rem;color:var(--muted)}
.sources h2{font-size:1.04rem;margin:0 0 11px;font-family:"Public Sans",sans-serif;font-weight:700;letter-spacing:0}
.sources ol{padding-left:19px}
.sources li{margin-bottom:7px;line-height:1.5}

/* ------------------------------------------------------- 404 ---- */
.oops{text-align:center;padding-block:70px 40px}
.oops .code{
  font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:3.2rem;
  color:var(--accent);margin:0 0 10px;letter-spacing:-.03em;
}

@media (max-width:560px){
  .footnav{grid-template-columns:repeat(2,1fr);gap:26px 18px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}