:root{
  --dark:#191C1F; --darker:#0E1013; --surface:#F4F4F4; --white:#FFFFFF;
  --red:#E50020; --red-dark:#B8001A;
  --ink-2:rgba(25,28,31,.66); --ink-3:rgba(25,28,31,.44);
  --hair:rgba(25,28,31,.12); --line:#E5E7EB;
  --on-dark-2:rgba(255,255,255,.68); --on-dark-3:rgba(255,255,255,.46);
  --on-dark-hair:rgba(255,255,255,.14);
  --ease:cubic-bezier(0.16,1,0.3,1);
  --measure:68ch;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--white);color:var(--dark);
  font-family:'Montserrat',system-ui,-apple-system,sans-serif;
  font-size:16px;font-weight:400;line-height:1.55;letter-spacing:.16px;
  -webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%}
a{color:var(--red)}
a:hover{color:var(--red-dark)}
h1,h2,h3,h4{font-family:'Domine',Georgia,serif;font-weight:500;margin:0}
.wrap{max-width:1240px;margin:0 auto;padding:0 40px}

.band-dark{background:var(--dark);color:var(--white)}
.band-surface{background:var(--surface)}
.band-red{background:var(--red);color:var(--white)}

/* nav — dark, not sticky, matches homepage */
.nav{position:relative;z-index:20;background:var(--dark);border-bottom:1px solid var(--on-dark-hair)}
.nav-inner{max-width:1240px;margin:0 auto;padding:22px 40px;display:flex;align-items:center;gap:30px}
.brand{display:flex;align-items:center;flex:0 0 auto;text-decoration:none}
.brand img{height:32px;width:auto;display:block}
.nav-links{margin-left:auto;display:flex;align-items:center;gap:30px}
.nav-links a.link{font-size:15px;font-weight:600;color:var(--white);text-decoration:none;transition:color .18s ease}
.nav-links a.link:hover{color:var(--red)}

/* pills */
.btn{display:inline-flex;align-items:center;justify-content:center;
  font-family:'Montserrat',sans-serif;font-size:15px;font-weight:600;letter-spacing:.16px;
  padding:14px 32px;border-radius:9999px;text-decoration:none;
  border:2px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease}
.btn-red{background:var(--red);color:var(--white)}
.btn-red:hover{background:var(--red-dark)}
.btn-ghost{background:transparent;color:var(--white);border-color:rgba(255,255,255,.42)}
.btn-ghost:hover{background:var(--white);color:var(--dark);border-color:var(--white)}
.btn-on-red{background:var(--white);color:var(--red)}
.btn-on-red:hover{background:var(--surface)}
.btn-sm{padding:11px 24px;font-size:14px}

/* eyebrow */
.eyebrow{display:flex;align-items:center;gap:14px;font-size:12.5px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--dark);margin:0 0 26px}
.eyebrow::before{content:"";width:44px;height:3px;background:var(--red);flex:0 0 auto}
.eyebrow.on-dark{color:var(--white)}

/* ---------- article header band (dark, watermark DNA) ---------- */
.art-head{position:relative;overflow:hidden;background:var(--dark);color:var(--white);padding:96px 0 88px}
.art-head .watermark{position:absolute;left:-2vw;bottom:-4vw;z-index:1;
  font-family:'Domine',Georgia,serif;font-weight:700;line-height:.8;
  font-size:clamp(90px,16vw,240px);color:rgba(255,255,255,.04);pointer-events:none;user-select:none;white-space:nowrap}
.art-head-inner{position:relative;z-index:2;max-width:920px}
.art-head h1{font-size:clamp(34px,4.6vw,58px);line-height:1.08;letter-spacing:-1px;margin:0 0 26px;text-wrap:balance}
.art-meta{display:flex;flex-wrap:wrap;gap:10px 26px;align-items:center;
  font-size:13.5px;color:var(--on-dark-2);margin-top:30px}
.art-meta .chip{border:1px solid var(--on-dark-hair);border-radius:9999px;padding:6px 16px;
  font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--white)}
.art-lede{font-size:19px;line-height:1.65;color:var(--on-dark-2);max-width:720px;margin:26px 0 0}

/* breadcrumb */
.crumbs{font-size:13px;color:var(--on-dark-3);margin-bottom:34px}
.crumbs a{color:var(--on-dark-2);text-decoration:none}
.crumbs a:hover{color:var(--white)}
.crumbs span[aria-current]{color:var(--white);font-weight:600}

/* ---------- prose band ---------- */
.prose-band{padding:104px 0 96px}
.prose{max-width:720px;margin:0 auto}
.prose>p:first-child{font-size:19px;line-height:1.7;color:var(--dark)}
.prose h2{font-size:clamp(26px,3vw,34px);line-height:1.2;letter-spacing:-.5px;margin:72px 0 22px;text-wrap:balance}
.prose h3{font-size:20px;margin:44px 0 14px}
.prose p{margin:0 0 22px;color:var(--ink-2)}
.prose li{color:var(--ink-2);margin-bottom:10px}
.prose strong{color:var(--dark);font-weight:600}
.prose a{color:var(--red);text-decoration:underline;text-underline-offset:2px}
.prose a:hover{color:var(--red-dark)}
.prose ol,.prose ul{margin:0 0 22px;padding-left:26px}
.prose blockquote{margin:34px 0;padding:6px 0 6px 28px;border-left:3px solid var(--red);
  font-family:'Domine',Georgia,serif;font-size:19px;color:var(--dark)}

/* tables — hairlines only, no shadows */
.tbl-wrap{overflow-x:auto;margin:34px 0 38px}
table{border-collapse:collapse;width:100%;font-size:14.5px}
th{text-align:left;font-family:'Montserrat',sans-serif;font-size:12px;font-weight:700;
  letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);
  padding:12px 16px;border-bottom:2px solid var(--dark)}
td{padding:13px 16px;border-bottom:1px solid var(--hair);vertical-align:top;color:var(--ink-2)}
tr td:first-child{color:var(--dark);font-weight:600}

/* footnote superscripts + references */
sup.fn{font-size:11px;line-height:0}
sup.fn a{color:var(--red);text-decoration:none;font-weight:600;padding:0 1px}
sup.fn a:hover{color:var(--red-dark);text-decoration:underline}
.refs{max-width:720px;margin:0 auto}
.refs ol{list-style:none;margin:0;padding:0;counter-reset:ref}
.refs li{counter-increment:ref;position:relative;padding:14px 0 14px 44px;
  border-bottom:1px solid var(--hair);font-size:13.5px;line-height:1.6;color:var(--ink-2)}
.refs li::before{content:"[" counter(ref) "]";position:absolute;left:0;top:14px;
  font-weight:700;color:var(--red);font-size:12.5px}
.refs a{color:var(--dark);font-weight:600;text-decoration:none;border-bottom:1px solid var(--hair)}
.refs a:hover{color:var(--red);border-bottom-color:var(--red)}
.refs-title{font-family:'Domine',Georgia,serif;font-size:22px;margin:0 0 8px}

/* important information */
.imp{padding:56px 0 64px}
.imp-inner{max-width:720px;margin:0 auto;border:1px solid var(--hair);border-radius:18px;padding:30px 34px}
.imp h2{font-size:16px;font-family:'Montserrat',sans-serif;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-3);margin:0 0 12px}
.imp p{margin:0;font-size:14px;line-height:1.7;color:var(--ink-3)}

/* footer entity */
.entity{padding:34px 0;border-top:1px solid var(--on-dark-hair)}
.entity-inner{max-width:1240px;margin:0 auto;padding:0 40px;display:flex;flex-wrap:wrap;gap:12px 30px;
  align-items:center;justify-content:space-between;font-size:13px;color:var(--on-dark-3)}
.entity img{height:26px;width:auto;opacity:.9}
.entity a{color:var(--on-dark-2);text-decoration:none}
.entity a:hover{color:var(--white)}

/* CTA band */
.cta{padding:110px 0;text-align:left}
.cta h2{font-size:clamp(34px,5vw,64px);line-height:1.05;letter-spacing:-1.5px;margin:0 0 20px}
.cta p{font-size:18px;color:rgba(255,255,255,.85);max-width:640px;margin:0 0 36px}

/* ---------- guide variant: sticky TOC (reference-document layout) ---------- */
.guide-layout{display:grid;grid-template-columns:minmax(0,720px) 260px;gap:72px;justify-content:center;align-items:start}
.guide-toc{position:sticky;top:36px;border:1px solid var(--hair);border-radius:18px;padding:26px 26px 18px;background:var(--white)}
.guide-toc .toc-title{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin:0 0 14px}
.guide-toc ol{list-style:none;margin:0;padding:0;counter-reset:toc}
.guide-toc li{counter-increment:toc;margin:0}
.guide-toc a{display:flex;gap:12px;padding:9px 0;font-size:13.5px;color:var(--ink-2);text-decoration:none;border-bottom:1px solid var(--hair)}
.guide-toc li:last-child a{border-bottom:none}
.guide-toc a::before{content:"0" counter(toc);font-family:'Domine',Georgia,serif;color:var(--red);font-weight:700;font-size:12.5px}
.guide-toc a:hover{color:var(--red)}
.formula-box{background:var(--surface);border-radius:18px;padding:26px 30px;margin:30px 0}
.formula-box ol{margin:0;padding-left:22px}
.formula-box li{font-family:'Domine',Georgia,serif;color:var(--dark);font-size:16.5px;margin-bottom:8px}
.magnet{background:var(--surface);border-radius:18px;padding:30px 32px;margin:44px 0 8px}
.magnet .magnet-kicker{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--red);margin:0 0 10px}
.magnet h3{font-size:21px;margin:0 0 10px}
.magnet p{margin:0 0 18px;font-size:14.5px}

/* ---------- 4-reasons: numbered reason blocks (process DNA) ---------- */
.reason{position:relative;padding:64px 0 20px;border-top:1px solid var(--hair);margin-top:56px}
.reason-num{position:absolute;top:6px;right:0;z-index:0;
  font-family:'Domine',Georgia,serif;font-weight:700;font-size:clamp(96px,12vw,150px);
  line-height:.8;color:rgba(229,0,32,.08);pointer-events:none;user-select:none}
.reason-kicker{position:relative;z-index:1;font-size:12.5px;font-weight:600;letter-spacing:.16em;
  text-transform:uppercase;color:var(--red);margin:0 0 10px}
.reason h2{position:relative;z-index:1;font-size:clamp(26px,3.2vw,36px);letter-spacing:-.5px;margin:0 0 8px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-top:26px}
.mini-h{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);
  margin:0 0 10px;padding-top:14px;border-top:1px solid var(--hair)}

/* next-article strip */
.next-strip{padding:64px 0}
.next-card{display:block;text-decoration:none;border:1px solid var(--hair);border-radius:18px;
  padding:30px 34px;transition:border-color .18s ease}
.next-card:hover{border-color:var(--red)}
.next-card .k{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin:0 0 8px}
.next-card h3{font-size:22px;margin:0;color:var(--dark)}

/* reveal motion — homepage DNA, no-FOUC gated */
.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* responsive */
@media (max-width:1060px){.guide-layout{grid-template-columns:minmax(0,1fr)}.guide-toc{display:none}}
@media (max-width:900px){
  .wrap{padding:0 24px}
  .nav-inner{padding:18px 24px}
  .nav-links{gap:18px}
  .nav-links a.link{font-size:14px}
  section,.prose-band{padding:72px 0}
  .art-head{padding:72px 0 64px}
  .art-head h1{font-size:clamp(30px,8vw,44px)}
  .split{grid-template-columns:1fr}
  .reason{padding-right:0}
  .reason-num{position:static;display:block;margin-bottom:-20px}
}
@media (max-width:640px){
  .nav-links a.link:not(.keep){display:none}
  .split{grid-template-columns:1fr}
  td,th{padding:10px 10px}
}

/* ---------- Free tools / downloads band (dark, stands out from the white grid) ---------- */
.tools-band{background:var(--dark);color:var(--white);padding:104px 0}
.tools-band .eyebrow{color:var(--white)}
.tools-band h2{font-size:clamp(30px,4vw,48px);letter-spacing:-1px;line-height:1.08;margin:0 0 14px}
.tools-band .lede{color:var(--on-dark-2);font-size:17px;max-width:620px;margin:0 0 46px}
.tools-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.tool-card{position:relative;overflow:hidden;border:1px solid var(--on-dark-hair);
  border-radius:18px;padding:30px 30px 26px;background:var(--darker);
  display:flex;flex-direction:column;gap:10px;transition:border-color .18s ease,transform .18s ease}
.tool-card:hover{border-color:var(--red);transform:translateY(-3px)}
.tool-card .k{font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--on-dark-3)}
.tool-card h3{font-size:21px;line-height:1.25;margin:6px 0 0}
.tool-card h3 a{color:var(--white);text-decoration:none}
.tool-card h3 a:hover{color:var(--red)}
.tool-card p{color:var(--on-dark-2);font-size:14.5px;margin:8px 0 0;flex:1}
.tool-card .cta-line{margin-top:18px;font-weight:700;font-size:14px;color:var(--red)}
.tool-card .cta-line::after{content:" →";transition:margin .18s ease}
.tool-card:hover .cta-line::after{margin-left:6px}
.tool-card.hero{background:var(--red);border-color:var(--red)}
.tool-card.hero .k{color:rgba(255,255,255,.75)}
.tool-card.hero h3 a{color:var(--white)}
.tool-card.hero p{color:rgba(255,255,255,.88)}
.tool-card.hero .cta-line{color:var(--white)}
.tool-card.hero .corner{position:absolute;top:-38px;right:-38px;width:130px;height:130px;
  border-radius:9999px;background:rgba(255,255,255,.12)}
@media (max-width:1060px){.tools-grid{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.tools-grid{grid-template-columns:1fr}.tools-band{padding:72px 0}}

/* ---------- blog homepage (editorial) ---------- */
.blog-hero{background:var(--dark);color:var(--white);padding:96px 0 96px;position:relative;overflow:hidden}
.blog-hero .watermark{position:absolute;left:-2vw;bottom:-4vw;font-family:'Domine',Georgia,serif;
  font-weight:700;line-height:.8;font-size:clamp(90px,15vw,220px);color:rgba(255,255,255,.04);
  pointer-events:none;user-select:none;white-space:nowrap}
.blog-hero-inner{position:relative;z-index:2;max-width:1240px;margin:0 auto;padding:0 40px}
.blog-hero .kicker{font-size:12.5px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--on-dark-3);margin:0 0 20px}
.blog-hero h1{font-size:clamp(32px,4.4vw,54px);line-height:1.1;letter-spacing:-1px;margin:0 0 16px;max-width:760px;text-wrap:balance}
.blog-hero .lede{color:var(--on-dark-2);font-size:17.5px;max-width:640px;margin:0 0 44px}
.hero-card{display:grid;grid-template-columns:1.15fr 1fr;border:1px solid var(--on-dark-hair);
  border-radius:18px;overflow:hidden;text-decoration:none;background:var(--darker);
  transition:border-color .18s ease}
.hero-card:hover{border-color:var(--red)}
.hero-card .hero-media{background:linear-gradient(135deg,var(--red) 0%,var(--red-dark) 100%);
  position:relative;min-height:280px}
.hero-card .hero-media .big-num{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-family:'Domine',Georgia,serif;font-weight:700;font-size:clamp(120px,14vw,220px);color:rgba(255,255,255,.16)}
.hero-card .hero-body{padding:38px 40px;display:flex;flex-direction:column;gap:12px}
.hero-card .k{font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--red)}
.hero-card h2{font-size:clamp(24px,2.6vw,32px);line-height:1.2;margin:0;color:var(--white)}
.hero-card p{color:var(--on-dark-2);font-size:15px;margin:0;flex:1}
.hero-card .cta-line{font-weight:700;font-size:14px;color:var(--white)}
.hero-card .cta-line::after{content:" →"}
.blog-rail{max-width:1240px;margin:0 auto;padding:88px 40px 8px;display:flex;align-items:baseline;
  justify-content:space-between;gap:20px;flex-wrap:wrap}
.blog-rail h2{font-size:clamp(24px,3vw,34px);letter-spacing:-.5px;margin:0}
.blog-rail .rss{font-size:13px;font-weight:600;color:var(--red);text-decoration:none}
.blog-grid{max-width:1240px;margin:30px auto 0;padding:0 40px;
  display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.blog-card{border:1px solid var(--hair);border-radius:18px;padding:30px 30px 24px;background:var(--white);
  display:flex;flex-direction:column;gap:10px;transition:border-color .18s ease}
.blog-card:hover{border-color:var(--red)}
.blog-card .k{font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3)}
.blog-card h3{font-size:22px;line-height:1.25;margin:8px 0 0}
.blog-card h3 a{color:var(--dark);text-decoration:none}
.blog-card h3 a:hover{color:var(--red)}
.blog-card p{color:var(--ink-2);font-size:14.5px;margin:8px 0 0;flex:1}
.blog-card .meta{margin-top:18px;display:flex;gap:8px;flex-wrap:wrap}
.blog-card .pill{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  border:1px solid var(--hair);border-radius:9999px;padding:5px 12px;color:var(--ink-2)}
.blog-cross{max-width:1240px;margin:56px auto 0;padding:0 40px}
.blog-cross-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  border:1px solid var(--hair);border-radius:18px;padding:26px 34px;background:var(--surface)}
.blog-cross p{margin:0;font-size:15px;color:var(--ink-2)}
.blog-cross strong{color:var(--dark)}
@media (max-width:900px){
  .hero-card{grid-template-columns:1fr}
  .blog-grid{grid-template-columns:1fr}
  .blog-hero-inner,.blog-rail,.blog-grid,.blog-cross{padding-left:24px;padding-right:24px}
}

  /* library grid + search (index only) */
  .lib-tools{max-width:1240px;margin:0 auto;padding:0 40px 8px}
  .search-wrap{position:relative;max-width:560px}
  .search-wrap input{width:100%;padding:16px 56px 16px 24px;border-radius:9999px;
    border:2px solid var(--hair);background:var(--white);color:var(--dark);
    font-family:'Montserrat',sans-serif;font-size:15px;outline:none;
    transition:border-color .18s ease}
  .search-wrap input:focus{border-color:var(--red)}
  .search-wrap .mag{position:absolute;right:22px;top:50%;transform:translateY(-50%);
    color:var(--ink-3);font-size:16px;pointer-events:none}
  .ac{position:absolute;top:calc(100% + 8px);left:0;right:0;background:var(--white);
    border:1px solid var(--hair);border-radius:16px;overflow:hidden;z-index:30;display:none}
  .ac.open{display:block}
  .ac-item{display:block;width:100%;text-align:left;padding:13px 22px;border:none;background:none;
    cursor:pointer;font-family:'Montserrat',sans-serif;font-size:14.5px;color:var(--dark)}
  .ac-item .ac-k{display:block;font-size:11px;font-weight:700;letter-spacing:.12em;
    text-transform:uppercase;color:var(--ink-3);margin-bottom:2px}
  .ac-item:hover,.ac-item.active{background:var(--surface)}
  .ac-item mark{background:none;color:var(--red);font-weight:700}
  .ac-empty{padding:14px 22px;font-size:14px;color:var(--ink-3)}
  .lib-grid{max-width:1240px;margin:26px auto 0;padding:0 40px;
    display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
  .lib-card{border:1px solid var(--hair);border-radius:18px;padding:28px 28px 24px;
    display:flex;flex-direction:column;gap:10px;background:var(--white);
    transition:border-color .18s ease;min-height:220px}
  .lib-card:hover{border-color:var(--red)}
  .lib-card.hidden-by-filter,.lib-card.hidden-by-paging{display:none}
  .lib-card .k{font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
    color:var(--ink-3);margin:0}
  .lib-card h3{font-size:20px;line-height:1.25;margin:10px 0 0}
  .lib-card h3 a{color:var(--dark);text-decoration:none}
  .lib-card h3 a:hover{color:var(--red)}
  .lib-card h3 a mark{background:none;color:var(--red)}
  .lib-card .x{font-size:14px;color:var(--ink-2);margin:10px 0 0;flex:1}
  .lib-card .meta{margin-top:auto;padding-top:16px;display:flex;gap:8px;flex-wrap:wrap}
  .lib-card .pill{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
    border:1px solid var(--hair);border-radius:9999px;padding:5px 12px;color:var(--ink-2)}
  .lib-card .pill.soon{border-color:rgba(229,0,32,.35);color:var(--red)}
  .lib-more{max-width:1240px;margin:34px auto 0;padding:0 40px;display:none;justify-content:center}
  .lib-more.on{display:flex}
  .lib-count{max-width:1240px;margin:18px auto 0;padding:0 40px;font-size:13px;color:var(--ink-3)}
  .lib-empty{display:none;max-width:1240px;margin:10px auto 0;padding:0 40px;font-size:15px;color:var(--ink-2)}
  .lib-empty.on{display:block}
  @media (max-width:1060px){.lib-grid{grid-template-columns:repeat(2,1fr)}}
  @media (max-width:640px){.lib-grid{grid-template-columns:1fr}.lib-tools{padding:0 24px}.lib-grid{padding:0 24px}}