:root{
  --paper:#F2F4F7;--card:#FFFFFF;--ink:#15233B;--muted:#56637A;--rule:#D6DCE5;
  --red:#C23B32;--blue:#2A579E;--blue-soft:#E6ECF6;
  --sans:"Public Sans",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --type:"Courier Prime","Courier New",Courier,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.6 var(--sans)}
a{color:var(--blue);text-underline-offset:2px}
a:hover{color:var(--ink)}
:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
img{max-width:100%}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:#fff;padding:8px;z-index:9}

/* header */
.site-head{background:var(--card);border-bottom:1px solid var(--rule)}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:19px;letter-spacing:-.01em}
.logo svg{flex:none}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{text-decoration:none;color:var(--ink);padding:8px 12px;border-radius:6px;font-weight:600;font-size:15px}
.nav a:hover,.nav a[aria-current]{background:var(--blue-soft)}

/* breadcrumbs */
.crumbs{font-size:14px;color:var(--muted);margin:22px auto 0}
.crumbs a{color:var(--muted)}
.crumbs span{margin:0 6px}

/* hero / tool */
.tool{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:40px;align-items:start;padding:36px 20px 40px}
.tool h1{font-size:clamp(30px,4.2vw,46px);line-height:1.08;letter-spacing:-.02em;margin:0 0 14px;font-weight:800}
.tool .lede{color:var(--muted);margin:0 0 24px;max-width:46ch}
.controls{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.controls label{display:block;font-size:14px;font-weight:700;margin-bottom:5px}
.controls select{width:100%;font:inherit;font-size:16px;padding:10px 12px;border:1px solid #B8C2D1;border-radius:6px;background:#fff;color:var(--ink)}
.checks{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:6px 20px;font-size:15px}
.checks label{display:flex;align-items:center;gap:7px;font-weight:500;margin:0}
.checks input{width:18px;height:18px;accent-color:var(--blue)}
.btn{font:inherit;font-weight:700;border:0;border-radius:6px;padding:12px 18px;cursor:pointer;background:var(--ink);color:#fff}
.btn:hover{background:var(--blue)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid #B8C2D1;padding:9px 14px;font-size:15px}
.btn.ghost:hover{border-color:var(--ink)}
.go{grid-column:1/-1;font-size:17px;padding:14px}

/* the envelope */
.envelope{position:relative;background:#fff;border-radius:4px;padding:14px;
  background-image:repeating-linear-gradient(135deg,var(--red) 0 16px,#fff 16px 26px,var(--blue) 26px 42px,#fff 42px 52px);
  box-shadow:0 18px 40px -22px rgba(21,35,59,.45)}
.envelope-inner{background:#fff;min-height:300px;padding:26px 28px 30px;position:relative}
.env-from{font-family:var(--type);font-size:13px;line-height:1.35;color:var(--muted)}
.stamp{position:absolute;top:20px;right:22px;width:74px;height:88px;background:var(--blue-soft);
  border:5px dotted #fff;outline:1px solid #B8C2D1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--blue);font-weight:800}
.stamp b{font-size:26px;line-height:1}.stamp small{font-size:10px;font-weight:700}
.postmark{position:absolute;top:34px;right:76px;width:86px;height:86px;border:2px solid rgba(21,35,59,.55);border-radius:50%;
  display:flex;flex-direction:column;align-items:center;justify-content:center;font-family:var(--type);font-size:11px;color:rgba(21,35,59,.7);transform:rotate(-12deg);line-height:1.2;text-align:center}
.postmark::after{content:"";position:absolute;left:62px;top:22px;width:70px;height:40px;
  background:repeating-linear-gradient(180deg,transparent 0 7px,rgba(21,35,59,.45) 7px 9px)}
.env-to{font-family:var(--type);font-size:clamp(17px,2.1vw,21px);line-height:1.45;margin:92px 0 0 18%;white-space:pre-line;min-height:120px}
.env-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.env-note{font-size:13px;color:var(--muted);margin-top:10px}
.env-meta{display:flex;flex-wrap:wrap;gap:4px 18px;font-size:14px;color:var(--muted);margin-top:8px}
.env-meta b{color:var(--ink);font-weight:700}

/* results */
.results{margin:0 auto 48px;display:none}
.results.on{display:block}
.results-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.results-head h2{margin:0;font-size:22px}
.table-scroll{overflow-x:auto;background:#fff;border:1px solid var(--rule);border-radius:6px}
table{border-collapse:collapse;width:100%;font-size:15px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--rule);vertical-align:top}
th{background:#F7F9FB;font-size:13px;font-weight:700;white-space:nowrap}
tr:last-child td{border-bottom:0}
td.mono{font-family:var(--type);font-size:15px;white-space:nowrap}
.copy-sm{font:inherit;font-size:13px;font-weight:700;border:1px solid #B8C2D1;background:#fff;border-radius:5px;padding:4px 9px;cursor:pointer;color:var(--ink)}
.copy-sm:hover{border-color:var(--ink)}

/* sections */
.section{padding:44px 0;border-top:1px solid var(--rule)}
.section h2{font-size:28px;letter-spacing:-.015em;margin:0 0 8px;line-height:1.2}
.section > .wrap > p.sub{color:var(--muted);margin:0 0 24px;max-width:62ch}
.rack{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:0;border-top:1px solid var(--rule);border-left:1px solid var(--rule);background:#fff}
.rack a{display:flex;align-items:baseline;gap:10px;padding:12px 14px;border-right:1px solid var(--rule);border-bottom:1px solid var(--rule);text-decoration:none;color:var(--ink)}
.rack a:hover{background:var(--blue-soft)}
.rack .ab{font-family:var(--type);font-weight:700;color:var(--red);min-width:26px}
.rack .ct{margin-left:auto;font-size:13px;color:var(--muted)}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:1px;background:var(--rule);border:1px solid var(--rule);border-radius:6px;overflow:hidden;margin:0 0 28px}
.facts div{background:#fff;padding:14px 16px}
.facts dt{font-size:13px;color:var(--muted);font-weight:600}
.facts dd{margin:2px 0 0;font-weight:800;font-size:19px}
.two{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,2fr);gap:40px}
.chips{display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:0;list-style:none}
.chips li{font-family:var(--type);font-size:15px;background:#fff;border:1px solid var(--rule);border-radius:4px;padding:3px 8px}
.chips a{text-decoration:none}
.steps{padding-left:22px}.steps li{margin-bottom:8px}
.faq details{background:#fff;border:1px solid var(--rule);border-radius:6px;padding:0 16px;margin-bottom:8px}
.faq summary{cursor:pointer;font-weight:700;padding:14px 0}
.faq details p{margin:0 0 14px;color:var(--muted)}

/* prose / blog */
.prose{max-width:70ch}
.prose h1{font-size:clamp(28px,4vw,42px);line-height:1.12;letter-spacing:-.02em;margin:18px 0 12px}
.prose h2{font-size:25px;line-height:1.25;margin:34px 0 10px;letter-spacing:-.01em}
.prose h3{font-size:20px;margin:26px 0 8px}
.prose p,.prose li{font-size:18px;line-height:1.7}
.prose table{margin:14px 0 20px;background:#fff;border:1px solid var(--rule)}
.prose .table-scroll{margin:14px 0 20px}
.prose .table-scroll table{margin:0;border:0}
.post-meta{color:var(--muted);font-size:15px;margin:0 0 24px}
.addr-sample{font-family:var(--type);background:#fff;border:1px solid var(--rule);border-left:4px solid var(--red);padding:14px 18px;white-space:pre-line;font-size:17px;line-height:1.5;margin:14px 0 20px}
.cta-box{background:var(--ink);color:#fff;border-radius:8px;padding:22px 24px;margin:36px 0}
.cta-box p{margin:0 0 12px;color:#D5DCE8}
.cta-box a.btn{background:#fff;color:var(--ink);text-decoration:none;display:inline-block}
.cta-box a.btn:hover{background:var(--blue-soft)}
.post-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:48px;padding-bottom:56px}
.side h2{font-size:17px;margin:28px 0 10px}
.side ul{list-style:none;padding:0;margin:0}
.side li{border-bottom:1px solid var(--rule)}
.side li a{display:block;padding:9px 0;text-decoration:none;font-size:15px;line-height:1.4}
.post-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.post-list li{background:#fff;border:1px solid var(--rule);border-radius:6px;padding:18px 20px}
.post-list h3{font-size:19px;line-height:1.3;margin:4px 0 8px}
.post-list h3 a{text-decoration:none;color:var(--ink)}
.post-list h3 a:hover{color:var(--blue)}
.post-list p{margin:0;color:var(--muted);font-size:15px}
.post-list .cat{font-size:13px;color:var(--red);font-weight:700}
.pager{display:flex;flex-wrap:wrap;gap:6px;margin:28px 0 56px}
.pager a,.pager span{padding:7px 12px;border:1px solid var(--rule);border-radius:5px;background:#fff;text-decoration:none;font-size:15px}
.pager span{background:var(--ink);color:#fff;border-color:var(--ink)}
.cats{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 24px}
.cats button{font:inherit;font-size:14px;font-weight:600;border:1px solid #B8C2D1;background:#fff;border-radius:20px;padding:6px 14px;cursor:pointer;color:var(--ink)}
.cats button[aria-pressed=true]{background:var(--ink);color:#fff;border-color:var(--ink)}
.page-top{padding-top:8px;padding-bottom:10px}
.page-top h1{font-size:clamp(28px,4vw,42px);letter-spacing:-.02em;margin:14px 0 8px;line-height:1.12}
.page-top p{color:var(--muted);max-width:64ch;margin:0 0 20px}
.form-grid{display:grid;gap:14px;max-width:560px}
.form-grid input,.form-grid textarea{width:100%;font:inherit;padding:10px 12px;border:1px solid #B8C2D1;border-radius:6px}
.form-grid label{font-weight:700;font-size:14px}

/* footer */
.site-foot{background:var(--ink);color:#C9D2E0;padding:40px 0 30px;margin-top:20px;font-size:15px}
.site-foot a{color:#fff;text-decoration:none}.site-foot a:hover{text-decoration:underline}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px}
.site-foot h2{font-size:15px;color:#fff;margin:0 0 10px}
.site-foot ul{list-style:none;padding:0;margin:0}.site-foot li{margin-bottom:6px}
.foot-note{border-top:1px solid rgba(255,255,255,.15);margin-top:28px;padding-top:18px;font-size:13px;color:#9FACC2}
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:10px 16px;border-radius:6px;opacity:0;transition:.2s;pointer-events:none;font-size:15px;z-index:20}
.toast.on{opacity:1;transform:translateX(-50%) translateY(0)}

@media (max-width:900px){
  .tool,.two,.post-layout{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .env-to{margin-left:4%}
}
@media (max-width:520px){
  .controls{grid-template-columns:1fr}
  .envelope-inner{padding:18px 16px 22px}
  .stamp{width:58px;height:70px;top:14px;right:14px}.stamp b{font-size:20px}
  .postmark{width:70px;height:70px;right:60px;top:26px;font-size:9px}
  .postmark::after{display:none}
  .env-to{margin-top:84px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
.env-to.fresh{animation:drop .35s ease-out}
@keyframes drop{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}