:root{--ink:#111;--mut:#5a5f68;--line:#e6e8ec;--bg:#fff;--card:#fcfcfd;--accent:#111;--ok:#0a7d3c;--bad:#b42318}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
main{max-width:44rem;margin:0 auto;padding:0 1.25rem 4rem}
.hero{padding:4.5rem 0 2rem}
.eyebrow{margin:0 0 .75rem;font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;color:var(--mut)}
h1{font-size:clamp(1.7rem,4.6vw,2.6rem);line-height:1.15;letter-spacing:-.02em;margin:0 0 1rem}
.sub{font-size:1.12rem;color:var(--mut);margin:0 0 2rem;max-width:38rem}
.wl{display:flex;flex-wrap:wrap;gap:.6rem;align-items:flex-start;max-width:32rem}
.wl input[type=email]{flex:1 1 16rem;min-width:0;padding:.85rem 1rem;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff;color:inherit}
.wl input[type=email]:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.wl button{flex:0 0 auto;padding:.85rem 1.3rem;border:1px solid var(--accent);border-radius:10px;background:var(--accent);color:#fff;font:inherit;font-weight:600;cursor:pointer}
.wl button:hover{opacity:.88}
.wl-note{flex:1 1 100%;margin:.35rem 0 0;font-size:.85rem;color:var(--mut)}
.wl-msg{margin:.9rem 0 0;font-size:.95rem;min-height:1.2em}
.wl-msg.ok{color:var(--ok)}
.wl-msg.bad{color:var(--bad)}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
section{padding:2.2rem 0;border-top:1px solid var(--line)}
h2{font-size:1.3rem;letter-spacing:-.01em;margin:0 0 .9rem}
h3{font-size:1.02rem;margin:1.4rem 0 .4rem}
p{margin:0 0 1rem}
ul{margin:0 0 1rem;padding-left:1.15rem}
li{margin:.35rem 0}
.faq details{border:1px solid var(--line);border-radius:10px;padding:.85rem 1rem;margin:.5rem 0;background:var(--card)}
.faq summary{cursor:pointer;font-weight:600}
.faq details p{margin:.7rem 0 0;color:var(--mut)}
.foot{border-top:1px solid var(--line);padding-top:1.5rem;color:var(--mut);font-size:.86rem}
.foot a{color:inherit}
a{color:var(--accent)}
@media (prefers-color-scheme:dark){
  :root{--ink:#f2f3f5;--mut:#a2a8b3;--line:#272b33;--bg:#0c0d10;--card:#12141a;--accent:#f2f3f5}
  .wl input[type=email]{background:var(--card)}
  .wl button{background:var(--accent);color:#0c0d10}
  .faq details{background:var(--card)}
}

/* First-party consultation/feedback block. */
.contact{padding:2.2rem 0;border-top:1px solid var(--line)}
.contact h2{margin-bottom:.5rem}
.contact-sub{color:var(--mut);font-size:.95rem;max-width:38rem}
.cf{display:flex;flex-wrap:wrap;gap:.7rem;max-width:40rem;margin:1rem 0 0}
.cf label{display:flex;flex-direction:column;gap:.3rem;flex:1 1 100%;font-size:.85rem;color:var(--mut)}
.cf input[type=email],.cf textarea{padding:.8rem 1rem;border:1px solid var(--line);border-radius:10px;font:inherit;background:var(--bg);color:var(--ink)}
.cf textarea{resize:vertical;min-height:6.5rem;line-height:1.5}
.cf input[type=email]:focus,.cf textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.cf button{flex:0 0 auto;padding:.8rem 1.25rem;border:1px solid var(--accent);border-radius:10px;background:var(--accent);color:#fff;font:inherit;font-weight:600;cursor:pointer}
.cf button:hover{opacity:.88}
.cf-note{flex:1 1 100%;font-size:.85rem;color:var(--mut);margin:0}
.cf-msg{flex:1 1 100%;min-height:1.2em;margin:.2rem 0 0;font-size:.92rem}
.cf-msg.ok{color:var(--ok)}
.cf-msg.bad{color:var(--bad)}
@media (prefers-color-scheme:dark){
  .cf button{color:#0c0d10}
}
.crumbs{display:flex;flex-wrap:wrap;gap:.45rem;padding:1.2rem 0 0;font-size:.85rem;color:var(--mut)}
.crumbs a{color:var(--mut);text-decoration:none}
.crumbs a:hover{color:var(--ink);text-decoration:underline}
.crumbs span[aria-current]{color:var(--ink)}
.tool-hero{padding:2rem 0 1.4rem}
.tool-hero h1{margin-bottom:.7rem}
.tool-ui{margin:0 0 1rem}
.tool-panel{border:1px solid var(--line);border-radius:14px;background:var(--card);padding:1.15rem}
.tabs{display:flex;gap:.4rem;margin:0 0 1rem;flex-wrap:wrap}
.tab{border:1px solid var(--line);background:transparent;color:var(--mut);font:inherit;font-size:.9rem;padding:.45rem .85rem;border-radius:999px;cursor:pointer}
.tab.active{border-color:var(--accent);color:var(--ink);background:var(--bg)}
.tool-row{display:flex;flex-wrap:wrap;gap:.9rem;margin:0 0 .9rem}
.tool-row>*{flex:1 1 12rem;min-width:0}
.field{display:block;margin:0 0 .9rem}
.field>span{display:block;font-size:.82rem;font-weight:600;letter-spacing:.01em;margin:0 0 .35rem;color:var(--mut)}
.field input,.field select,.field textarea{width:100%;padding:.7rem .8rem;border:1px solid var(--line);border-radius:9px;background:var(--bg);color:var(--ink);font:inherit;font-size:.98rem}
.field textarea{resize:vertical;min-height:6rem;line-height:1.5}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.check{display:flex;align-items:center;gap:.5rem;font-size:.9rem;color:var(--mut);margin:.2rem 0 .9rem}
.check input{width:1.05rem;height:1.05rem;accent-color:var(--accent)}
.tool-actions{display:flex;flex-wrap:wrap;gap:.6rem;margin:.3rem 0 .6rem}
.btn{appearance:none;border:1px solid var(--line);background:var(--bg);color:var(--ink);font:inherit;font-size:.92rem;font-weight:600;padding:.6rem 1rem;border-radius:9px;cursor:pointer}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--bg)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.tool-note{font-size:.83rem;color:var(--mut);margin:.5rem 0 0}
.tool-output{display:block;width:100%;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink);font:0.9rem/1.55 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;padding:.8rem;min-height:5rem;white-space:pre-wrap;word-break:break-word}
.qr-box{display:flex;justify-content:center;align-items:center;margin:1rem 0 .2rem;min-height:8rem}
.qr-box canvas{max-width:100%;height:auto;image-rendering:pixelated;border:1px solid var(--line);border-radius:8px;background:#fff}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(8.5rem,1fr));gap:.7rem;margin:.4rem 0 1rem}
.stat{border:1px solid var(--line);border-radius:10px;background:var(--bg);padding:.75rem .85rem}
.stat b{display:block;font-size:1.35rem;line-height:1.2;font-variant-numeric:tabular-nums}
.stat span{display:block;font-size:.78rem;color:var(--mut);margin-top:.2rem}
.result-line{display:flex;flex-wrap:wrap;align-items:baseline;gap:.6rem;margin:.35rem 0;padding:.55rem 0;border-bottom:1px dashed var(--line)}
.result-line:last-child{border-bottom:0}
.result-line b{font-size:1.02rem;font-variant-numeric:tabular-nums;word-break:break-all}
.result-line span{font-size:.8rem;color:var(--mut);min-width:5.5rem}
.result-line .copy-btn{margin-left:auto}
.copy-btn{appearance:none;border:1px solid var(--line);background:transparent;color:var(--mut);font:inherit;font-size:.76rem;padding:.2rem .5rem;border-radius:6px;cursor:pointer}
.copy-btn:hover{color:var(--ink);border-color:var(--accent)}
.badge{display:inline-block;font-size:.75rem;font-weight:600;padding:.2rem .55rem;border-radius:999px;border:1px solid var(--line);color:var(--mut)}
.badge.ok{color:var(--ok);border-color:var(--ok)}
.badge.bad{color:var(--bad);border-color:var(--bad)}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(13rem,1fr));gap:.8rem}
.tool-card{display:block;border:1px solid var(--line);border-radius:12px;background:var(--card);padding:1rem 1.05rem;text-decoration:none;color:inherit;transition:border-color .15s ease}
.tool-card:hover{border-color:var(--accent)}
.tool-card h3{margin:0 0 .35rem;font-size:1rem}
.tool-card p{margin:0;font-size:.86rem;color:var(--mut);line-height:1.5}
.tool-card .tool-card-cta{display:inline-block;margin-top:.6rem;font-size:.8rem;font-weight:600;color:var(--accent)}
.tool-grid h2{margin-top:0}
.related{padding-top:2rem}
.newsletter{padding-top:2rem}
.newsletter h2{font-size:1.15rem}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.small{font-size:.85rem;color:var(--mut)}
.error{color:var(--bad)}
.ok{color:var(--ok)}
.ref-summary{font-size:1.02rem;line-height:1.6;color:var(--ink);margin:0 0 1rem}
.ref-facts{margin:0 0 1.4rem}
.ref-facts h2{font-size:1rem;margin:0 0 .6rem}
.ref-table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px;background:var(--card)}
.ref-table{width:100%;border-collapse:collapse;font-size:.9rem}
.ref-table th,.ref-table td{text-align:left;padding:.6rem .8rem;border-bottom:1px solid var(--line);vertical-align:top}
.ref-table tr:last-child th,.ref-table tr:last-child td{border-bottom:0}
.ref-table th{width:34%;font-weight:600;color:var(--mut);white-space:nowrap}
.ref-table td{font-variant-numeric:tabular-nums}
.ref-links{display:grid;grid-template-columns:repeat(auto-fill,minmax(14rem,1fr));gap:.6rem;margin:0 0 1rem}
.ref-link{display:block;border:1px solid var(--line);border-radius:10px;background:var(--card);padding:.7rem .85rem;text-decoration:none;color:inherit}
.ref-link:hover{border-color:var(--accent)}
.ref-link b{display:block;font-size:.92rem;margin-bottom:.2rem}
.ref-link span{display:block;font-size:.8rem;color:var(--mut);line-height:1.45}
.ref-related h2,.ref-tools h2{font-size:1.1rem;margin:0 0 .7rem}
.ref-set-intro{max-width:44rem}
.ref-set-intro p{margin:0 0 .8rem;color:var(--mut);line-height:1.6}
.ref-set-intro p:last-child{margin-bottom:0}
.ref-list h3 a,.cat-h a{color:inherit;text-decoration:none}
.ref-list h3 a:hover,.cat-h a:hover{color:var(--accent);text-decoration:underline}
.data-dir{padding-top:2rem}
.data-list{border-top:1px solid var(--line);margin-top:.6rem}
.data-row{display:block;padding:.5rem 0;border-bottom:1px solid var(--line);text-decoration:none;color:inherit}
.data-row:hover b{color:var(--accent)}
.data-row b{display:inline-block;min-width:5rem;font-variant-numeric:tabular-nums}
.data-row span{font-weight:600;font-size:.92rem}
.data-row small{display:block;color:var(--mut);font-size:.8rem;line-height:1.45;margin-top:.15rem}
.data-row[hidden]{display:none}
.regex-flags{display:flex;flex-wrap:wrap;gap:.4rem 1.1rem;margin:.1rem 0 .9rem}
.regex-flags .check{margin:0}
.rx-preview{white-space:pre-wrap;word-break:break-word;border:1px solid var(--line);border-radius:10px;background:var(--card);padding:.8rem;font:0.92rem/1.6 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;margin:.2rem 0 .8rem}
mark.regex-hit{background:var(--accent);color:var(--bg);border-radius:3px;padding:0 .08em}
.rx-h3{font-size:.95rem;margin:1rem 0 .4rem}
.cat-h{margin:1.6rem 0 .7rem;font-size:.84rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--mut)}
.tool-grid>.cat-h:first-child,.ref-list>.cat-h:first-child{margin-top:.2rem}
.hd-table{width:100%;border-collapse:collapse;font-size:.88rem}
.hd-table th,.hd-table td{text-align:left;padding:.5rem .65rem;border-bottom:1px solid var(--line);vertical-align:top}
.hd-table thead th{color:var(--mut);font-weight:600;white-space:nowrap}
.hd-table tr:last-child td{border-bottom:0}
.hd-table .hd-name{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;white-space:nowrap}
.hd-table .hd-val{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;word-break:break-all}
.hd-table a{color:var(--accent)}
.hash-out{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;word-break:break-all}
.ref-table th{font-variant-numeric:tabular-nums}
.md-preview{border:1px solid var(--line);border-radius:10px;background:var(--bg);padding:.9rem 1rem;line-height:1.6;min-height:6rem;overflow-wrap:break-word}
.md-preview h1,.md-preview h2,.md-preview h3,.md-preview h4{margin:1rem 0 .45rem;line-height:1.3}
.md-preview h1{font-size:1.45rem}
.md-preview h2{font-size:1.2rem}
.md-preview h3{font-size:1.05rem}
.md-preview h4{font-size:.98rem}
.md-preview p{margin:0 0 .7rem}
.md-preview ul,.md-preview ol{margin:.2rem 0 .8rem;padding-left:1.4rem}
.md-preview li{margin:.15rem 0}
.md-preview blockquote{margin:.6rem 0;padding:.4rem .9rem;border-left:3px solid var(--accent);color:var(--mut)}
.md-preview code{font:.88em/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:rgba(127,127,127,.14);padding:.1em .32em;border-radius:4px}
.md-preview pre{overflow-x:auto;background:rgba(127,127,127,.1);border:1px solid var(--line);border-radius:8px;padding:.7rem .8rem;margin:.5rem 0 .9rem}
.md-preview pre code{background:none;padding:0}
.md-preview table{width:100%;border-collapse:collapse;margin:.4rem 0 1rem;font-size:.9rem}
.md-preview th,.md-preview td{border:1px solid var(--line);padding:.4rem .55rem;text-align:left}
.md-preview th{background:rgba(127,127,127,.08)}
.md-preview img{max-width:100%;height:auto}
.md-preview hr{border:0;border-top:1px solid var(--line);margin:1rem 0}
.md-preview a{color:var(--accent)}
.md-preview li.task{list-style:none;margin-left:-1.1rem}
.md-preview input[type=checkbox]{margin-right:.4rem}
@media (max-width:520px){
  .tool-panel{padding:.9rem}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .cards{grid-template-columns:1fr}
}

/* Compliance checker output blocks. */
.cmp-block{margin:1rem 0 0;padding:.95rem 1rem;border:1px solid var(--line);border-radius:12px;background:var(--bg)}
.cmp-block h3{margin:0 0 .5rem;font-size:1rem}
.cmp-block ul{margin:.2rem 0 .5rem;padding-left:1.1rem}
.cmp-block li{margin:.3rem 0;font-size:.93rem}
.cmp-block .result-line{margin:.2rem 0}

/* Declarative calculator (impl: calc). */
.calc{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(230px,.9fr);gap:1rem;align-items:start}
.calc-fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:.7rem}
.calc-field{display:flex;flex-direction:column;gap:.25rem;font-size:.84rem;color:var(--mut)}
.calc-field>span{font-weight:600;color:var(--ink)}
.calc-field input,.calc-field select{width:100%;padding:.62rem .7rem;border:1px solid var(--line);border-radius:9px;background:var(--bg);color:var(--ink);font:inherit;font-size:.96rem}
.calc-field input:focus,.calc-field select:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.calc-field em{font-style:normal;font-size:.74rem;color:var(--mut)}
.calc-field small{font-size:.74rem;line-height:1.35;color:var(--mut)}
.calc-field.check{flex-direction:row;align-items:center;gap:.5rem}
.calc-field.check input{width:1.05rem;height:1.05rem;accent-color:var(--accent)}
.calc-results{border:1px solid var(--line);border-radius:14px;background:var(--card);padding:.4rem 1rem}
.calc-result{display:flex;flex-direction:column;gap:.1rem;padding:.6rem 0;border-bottom:1px dashed var(--line)}
.calc-result:last-child{border-bottom:0}
.calc-result>span{font-size:.78rem;color:var(--mut)}
.calc-result>b{font-size:1.3rem;line-height:1.25;color:var(--ink);font-variant-numeric:tabular-nums;word-break:break-word}
.calc-result.primary>b{font-size:1.75rem;color:var(--accent)}
.calc-result small{font-size:.74rem;color:var(--mut)}
.calc>.tool-note{grid-column:1/-1;margin:.2rem 0 0}
@media (max-width:720px){.calc{grid-template-columns:1fr}}
.embed{margin:2rem 0;border:1px solid #e3e6ea;border-radius:10px;padding:.75rem 1rem;background:#fafbfc}
.embed summary{cursor:pointer;font-weight:600}
.embed textarea{width:100%;margin-top:.5rem;font:12px/1.5 ui-monospace,Consolas,monospace;padding:.6rem;border:1px solid #e3e6ea;border-radius:6px;background:#fff;resize:vertical}

:root{--accent:#2f6f4e}
@media (prefers-color-scheme:dark){.wl button{color:#fff}}

body.v-c main{max-width:38rem}
body.v-c .hero{border-left:5px solid var(--accent);padding:3.2rem 0 2rem 1.4rem}
body.v-c .eyebrow,body.v-c .wl-note,body.v-c .foot{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace}
body.v-c h1{font-size:clamp(1.55rem,3.8vw,2.15rem);letter-spacing:-.035em}
body.v-c section{border-top:1px dashed var(--line);padding:1.8rem 0}
body.v-c .wl input[type=email],body.v-c .wl button{border-radius:3px}
body.v-c .faq details{border-radius:3px;background:transparent}
body.v-c .faq summary{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.95rem}