:root{
  --ink:#171b1f;
  --muted:#66717b;
  --blue:#2d72ad;
  --blue-dark:#205987;
  --line:#d7dde2;
  --panel:#f3f5f7;
  --paper:#ffffff;
  --soft:#fafafa;
  --max:1080px;
  --radius:12px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,Helvetica,sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.5;
}
a{color:inherit}
button,input,select{font:inherit}
button{color:inherit}
img{max-width:100%;display:block}
.wrap{width:min(calc(100% - 32px),var(--max));margin-inline:auto}
.narrow{max-width:760px}
.hidden{display:none!important}
.sr-only{
  position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;
  overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important;
}
.eyebrow{
  font-size:.75rem;
  color:var(--blue);
  font-weight:800;
  letter-spacing:.16em;
  text-transform:uppercase;
}
h1{font-size:clamp(2.8rem,7vw,5.4rem);line-height:.94;margin:.18em 0 .22em;letter-spacing:-.045em}
h2{font-size:clamp(1.6rem,4vw,2.35rem);line-height:1.13;margin:.35em 0 .5em;letter-spacing:-.015em}
h3{font-size:clamp(1.15rem,2.5vw,1.45rem);line-height:1.24;margin:.25em 0 .4em}
p{margin-top:.65em;margin-bottom:.65em}
.muted{color:var(--muted)}
.kicker-copy{font-size:1.08rem;color:var(--muted);max-width:720px}
.button{
  min-height:44px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:10px 18px;
  border-radius:8px;
  text-decoration:none;
  font-weight:750;
  border:0;
  cursor:pointer;
}
.button.primary{background:var(--blue);color:#fff}
.button.primary:hover{background:var(--blue-dark)}
.button.secondary{border:1px solid var(--line);background:white}
.button.small{min-height:40px;padding:8px 14px;font-size:.9rem}
.button.disabled{opacity:.6;cursor:default}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

/* HEADER */
.site-header{
  width:min(calc(100% - 32px),var(--max));
  margin:auto;
  min-height:70px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  border-bottom:1px solid var(--line);
}
.brand{text-decoration:none;font-weight:900;letter-spacing:.07em}
.site-header nav{display:flex;flex-wrap:wrap;gap:18px;font-size:.92rem;align-items:center}
.site-header nav a{text-decoration:none;color:var(--muted)}
.site-header nav a:hover,.site-header nav a[aria-current="page"]{color:var(--ink);text-decoration:underline;text-underline-offset:4px}
.nav-cta{color:var(--blue)!important;font-weight:750}

/* HERO */
.hero{
  padding:62px 0 58px;
  display:grid;
  grid-template-columns:minmax(0,1.28fr) minmax(280px,.72fr);
  gap:54px;
  align-items:center;
}
.subtitle{
  font-family:Georgia,"Times New Roman",serif;
  font-weight:700;
  font-size:clamp(1.25rem,3vw,1.65rem);
  max-width:700px;
  line-height:1.28;
}
.lede{font-size:1.08rem;color:var(--muted);max-width:640px}
.not-accounting{font-weight:800}
.byline{font-size:.92rem;color:var(--muted);margin-top:21px}
.cover-card{
  border:1px solid var(--line);
  background:var(--panel);
  padding:10px;
  box-shadow:0 9px 26px rgba(0,0,0,.08);
}
.cover-card img{width:100%;height:auto}
.asset-note{font-size:.72rem;color:var(--muted);text-align:center;margin:8px 0 1px}

/* HOME */
.problem{background:var(--panel);padding:56px 0}
.problem h2{margin:0 0 16px}
.problem h2:nth-of-type(2){margin-top:24px}
.changed{font-size:1.15rem;line-height:1.72}
.section{padding:58px 0}
.follow-grid{
  margin-top:22px;display:grid;grid-template-columns:repeat(5,1fr);gap:8px
}
.follow-grid>div{
  border:1px solid var(--line);border-radius:8px;padding:14px 10px;font-weight:750;text-align:center;background:white
}
.follow-grid .gp{border-width:2px}
.tools-grid,.audience-grid,.part-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:24px
}
.card{border:1px solid var(--line);border-radius:var(--radius);padding:20px;background:white}
.card.soft{background:var(--panel);border-color:transparent}
.card strong{display:block;margin-bottom:5px}
.card p{color:var(--muted);font-size:.93rem;margin:.35em 0}
.section-rule{border-top:1px solid var(--line)}
.mini-sim{margin-top:26px}
.controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:20px}
.controls.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.control-card{border:1px solid var(--line);border-radius:var(--radius);padding:16px;min-width:0;background:white}
.control-label{display:flex;justify-content:space-between;align-items:baseline;gap:12px;font-weight:750}
.control-label label{min-width:0}
.control-label output{font-size:1.25rem;color:var(--blue);white-space:nowrap}
input[type="range"]{width:100%;accent-color:var(--blue);margin:20px 0 8px}
.range-labels{display:flex;justify-content:space-between;gap:8px;color:var(--muted);font-size:.74rem}
.statement-card{margin-top:18px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:white}
table{border-collapse:collapse;width:100%;table-layout:fixed}
th,td{padding:13px 12px;border-top:1px solid var(--line)}
thead th{border-top:0;background:var(--panel);text-align:left}
th:not(:first-child),td:not(:first-child){text-align:right;font-variant-numeric:tabular-nums}
.gross-profit td{font-weight:800}
.sim-note{font-size:.79rem;color:var(--muted);margin:12px 2px 0}

/* BOOK */
.book-hero{padding:58px 0 42px;display:grid;grid-template-columns:minmax(260px,.62fr) minmax(0,1.38fr);gap:54px;align-items:start}
.promise-box{
  border-left:4px solid var(--blue);
  background:var(--panel);
  border-radius:0 10px 10px 0;
  padding:16px 18px;
  margin:22px 0;
}
.part-card .part-label{font-size:.75rem;letter-spacing:.13em;color:var(--blue);font-weight:800}
.part-card ul{margin:.6em 0 0;padding-left:1.15em;color:var(--muted)}
.part-card li{margin:.35em 0}
.clean-list{padding-left:1.2em}
.clean-list li{margin:.48em 0}

/* SIMULATOR */
.sim-page{padding:54px 0 64px}
.sim-toolbar,.sandbox-toolbar{
  margin-top:24px;border:1px solid var(--line);background:var(--panel);border-radius:var(--radius);padding:16px;
  display:flex;flex-wrap:wrap;align-items:end;justify-content:space-between;gap:18px
}
.scenario-field{display:flex;flex-direction:column;gap:6px;font-weight:750;min-width:min(100%,340px)}
.scenario-field select{
  min-height:46px;border:1px solid var(--line);border-radius:8px;background:white;padding:8px 40px 8px 12px;color:var(--ink)
}
.view-options{display:flex;flex-wrap:wrap;gap:18px}
.view-options label,.sandbox-toolbar label{display:flex;align-items:center;gap:8px;font-weight:750;font-size:.92rem}
input[type="checkbox"]{width:20px;height:20px;accent-color:var(--blue)}
.guided-card{margin-top:16px;border:1px solid var(--line);border-radius:14px;padding:20px}
.guided-heading,.sandbox-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:20px}
.detail-panel{margin-top:14px;border-radius:10px;background:var(--panel);padding:14px 16px}
.detail-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;text-align:center}
.detail-grid strong{display:block;font-size:1.05rem}
.detail-grid span{display:block;color:var(--muted);font-size:.78rem;margin-top:2px}
.number-main{white-space:nowrap}
.number-pct{font-size:.72rem;color:var(--muted);font-weight:400;margin-top:1px}
.var-cell{font-weight:750;white-space:nowrap}
.variance-bps{font-size:.72rem;color:var(--muted);font-weight:650;margin-top:1px}
.bps-label{display:block;font-size:.68rem;color:var(--muted);font-weight:650;margin-top:2px;white-space:nowrap}
.bps-help.help{width:20px;height:20px;min-width:20px;min-height:20px;font-size:.68rem;margin-left:1px;vertical-align:middle}
.sandbox-section{margin-top:62px;padding-top:54px;border-top:2px solid var(--line)}
.sandbox-toolbar{justify-content:flex-start;margin-bottom:12px}
.accordion{display:flex;flex-direction:column;gap:8px}
.accordion details{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:white}
.accordion summary{
  min-height:58px;list-style:none;cursor:pointer;padding:14px 16px;display:flex;align-items:center;justify-content:space-between;gap:16px
}
.accordion summary::-webkit-details-marker{display:none}
.sum-left{display:flex;align-items:center;gap:9px}
.sign{
  width:24px;height:24px;border-radius:50%;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;
  font-weight:800;line-height:1;flex:0 0 auto
}
.summary-values{font-size:.76rem;color:var(--muted);text-align:right}
.accordion-body{border-top:1px solid var(--line);padding:14px}
.help{
  width:24px;height:24px;border-radius:50%;border:1px solid var(--line);background:white;color:var(--blue);
  font-weight:800;cursor:pointer;padding:0;margin-left:3px
}
.help-panel{margin:12px 0;border-left:4px solid var(--blue);background:var(--panel);padding:12px 14px;border-radius:0 8px 8px 0;font-size:.9rem}
.help-term{font-weight:800;color:var(--ink);margin-bottom:2px}
.help-definition{color:var(--muted)}

/* QUICK REFERENCE */
.reference-page{padding:54px 0 66px}
.reference-intro{max-width:800px}
.reference-note{
  max-width:850px;background:var(--panel);padding:14px 16px;border-radius:8px;color:var(--muted);font-size:.9rem;margin-top:14px
}
.reference-tools{margin-top:22px;display:flex;gap:10px;align-items:center}
.reference-search{flex:1;min-width:0}
.reference-search input{
  width:100%;min-height:46px;border:1px solid var(--line);border-radius:8px;background:white;padding:10px 13px;color:var(--ink);font-size:1rem
}
.reference-search input:focus{outline:3px solid rgba(45,114,173,.18);border-color:var(--blue)}
.reference-empty{margin-top:14px;border-radius:8px;background:var(--panel);padding:14px;color:var(--muted)}
.reference-groups{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.ref-group{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:white}
.ref-group>summary{
  min-height:56px;padding:14px 16px;display:flex;align-items:center;justify-content:space-between;gap:16px;cursor:pointer;list-style:none;font-weight:800
}
.ref-group>summary::-webkit-details-marker{display:none}
.ref-count{color:var(--muted);font-size:.76rem;font-weight:400;white-space:nowrap}
.ref-list{border-top:1px solid var(--line)}
.ref-term{border-bottom:1px solid var(--line)}
.ref-term:last-child{border-bottom:0}
.ref-term>summary{
  min-height:50px;padding:13px 16px;cursor:pointer;list-style:none;font-weight:750;display:flex;align-items:center;justify-content:space-between;gap:12px
}
.ref-term>summary::-webkit-details-marker{display:none}
.ref-term>summary::after{content:"+";color:var(--blue);font-size:1.1rem;font-weight:800;flex:0 0 auto}
.ref-term[open]>summary::after{content:"−"}
.ref-definition{padding:0 16px 15px;color:var(--muted);font-size:.92rem;line-height:1.55;max-width:850px}

/* ABOUT */
.about-hero{padding:58px 0 28px;max-width:820px}
.bio-layout{display:grid;grid-template-columns:minmax(200px,.42fr) minmax(0,1.58fr);gap:40px;align-items:start}
.photo-placeholder{
  aspect-ratio:4/5;background:var(--panel);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;text-align:center;
  color:var(--muted);padding:20px;font-size:.85rem
}

.author-photo-wrap{
  aspect-ratio:4/5;
  border:1px solid var(--line);
  overflow:hidden;
  background:var(--panel);
  box-shadow:0 8px 22px rgba(0,0,0,.07);
}
.author-photo{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center 20%;
}
.bio-copy p{font-size:1.02rem;line-height:1.66}
.bio-copy .muted{font-size:.95rem}

/* FOOTER */
.footer{
  border-top:1px solid var(--line);padding:24px 0 34px;color:var(--muted);font-size:.78rem
}
.footer-grid{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
.dev-banner{
  background:#20252a;color:white;text-align:center;padding:8px 16px;font-size:.78rem;letter-spacing:.03em
}

/* RESPONSIVE */
@media(max-width:760px){
  .site-header{align-items:flex-start;padding:18px 0;flex-direction:column}
  .site-header nav{gap:12px 16px}
  .hero,.book-hero,.bio-layout{grid-template-columns:1fr;gap:32px}
  .hero{padding-top:44px}
  .book-hero{padding-top:42px}
  .cover-card{max-width:460px;margin-inline:auto}
  .follow-grid{grid-template-columns:1fr 1fr}
  .follow-grid .gp{grid-column:1/-1}
  .tools-grid,.audience-grid,.part-grid{grid-template-columns:1fr}
  .controls,.controls.three{grid-template-columns:1fr}
  .guided-heading,.sandbox-heading{align-items:flex-start}
  .summary-values{max-width:48%}
  .detail-grid{grid-template-columns:1fr 1fr}
  th,td{padding:12px 7px}
  table{font-size:.87rem}
  .photo-placeholder{max-width:310px}
}
@media(max-width:520px){
  .sim-toolbar{align-items:stretch}
  .scenario-field{width:100%}
  .view-options{width:100%;flex-direction:column;gap:10px}
  .guided-card{padding:14px}
  .guided-heading,.sandbox-heading{flex-direction:column}
  .guided-heading .button,.sandbox-heading .button{width:100%}
  .sandbox-toolbar{flex-direction:column;align-items:flex-start}
  .accordion summary{align-items:flex-start}
  .summary-values{max-width:46%;line-height:1.25}
  .detail-grid{grid-template-columns:1fr}
  .statement-card th:first-child,.statement-card td:first-child{width:38%}
  .statement-card th:not(:first-child),.statement-card td:not(:first-child){font-size:.78rem}
  .reference-tools{align-items:stretch}
  .footer-grid{flex-direction:column}
}
@media(max-width:420px){
  .wrap,.site-header{width:min(calc(100% - 24px),var(--max))}
  .actions{flex-direction:column}
  .actions .button{width:100%}
  .statement-card th:first-child,.statement-card td:first-child{width:40%}
  .statement-card th,.statement-card td{padding:11px 5px}
  .summary-values{font-size:.7rem}
}


/* PRE-REPUTATION POLISH */
.skip-link{
  position:fixed;
  left:12px;
  top:12px;
  z-index:9999;
  transform:translateY(-180%);
  background:var(--ink);
  color:white;
  padding:10px 14px;
  border-radius:8px;
  text-decoration:none;
  font-weight:700;
}
.skip-link:focus{transform:translateY(0)}
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible{
  outline:3px solid rgba(45,114,173,.34);
  outline-offset:3px;
}
a:not(.button):not(.brand):not(.nav-cta){
  text-underline-offset:3px;
}
.table-caption{
  caption-side:top;
  text-align:left;
  padding:13px 12px;
  font-weight:800;
  background:white;
}
.model-note{
  max-width:850px;
  margin-top:18px;
  padding:13px 15px;
  border-left:4px solid var(--blue);
  background:var(--panel);
  border-radius:0 8px 8px 0;
  color:var(--muted);
  font-size:.9rem;
}
.model-note strong{color:var(--ink)}
.help{min-width:28px;min-height:28px}
.control-card input[type="range"]{min-height:28px}
.dev-banner{font-weight:700}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}
}

/* PUBLISHING IDENTITY */
.publication-details{
  margin-top:24px;
  border-top:1px solid var(--line);
  padding-top:16px;
  display:grid;
  gap:8px;
  max-width:620px;
  font-size:.9rem;
}
.publication-details>div{display:grid;grid-template-columns:140px 1fr;gap:14px}
.publication-details strong{color:var(--ink)}
.publication-details span{color:var(--muted)}
@media(max-width:520px){.publication-details>div{grid-template-columns:1fr;gap:1px}}