:root{
  --ink:#16324F;
  --ink-soft:#4A6076;
  --paper:#F5F7F3;
  --paper-raised:#FFFFFF;
  --teal:#3F7D6B;
  --teal-deep:#2C5B4D;
  --teal-pale:#E4EFEA;
  --gold:#E3A93B;
  --gold-pale:#FBF0DA;
  --rose:#B14C57;
  --rose-pale:#F7E7E7;
  --line:#DCE2D9;
  --font-display:'Space Grotesk', sans-serif;
  --font-body:'Public Sans', sans-serif;
  --font-mono:'IBM Plex Mono', monospace;
  --radius-lg:24px;
  --radius-md:16px;
  --radius-sm:10px;
  --shadow:0 10px 30px rgba(22,50,79,0.07);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.01ms !important; animation-iteration-count:1 !important; transition-duration:0.01ms !important;}
}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img,svg{display:block;}
.skip-link{
  position:absolute;top:-100%;left:16px;z-index:1000;
  background:var(--ink);color:#fff;padding:12px 20px;border-radius:0 0 var(--radius-sm) var(--radius-sm);
  font-family:var(--font-body);font-weight:600;font-size:0.92rem;
  transition:top 0.15s ease;
}
.skip-link:focus{top:0;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
.wrap{max-width:1120px;margin:0 auto;padding:0 32px;}
@media (max-width:640px){.wrap{padding:0 20px;}}

.eyebrow{
  font-family:var(--font-mono);
  font-size:0.72rem;
  font-weight:600;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--teal-deep);
}
h1,h2,h3{font-family:var(--font-display);color:var(--ink);margin:0;letter-spacing:-0.01em;}
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-body);
  font-weight:600;
  font-size:0.95rem;
  padding:13px 26px;
  border-radius:999px;
  border:1.5px solid transparent;
  cursor:pointer;
  transition:transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover{transform:translateY(-1px);}
.btn:focus-visible{outline:2px solid var(--teal-deep);outline-offset:3px;}
.btn-primary{background:var(--teal-deep);color:#fff;}
.btn-primary:hover{background:var(--ink);}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:#fff;}
.btn-arrow{transition:transform 0.15s ease;}
.btn:hover .btn-arrow{transform:translateX(3px);}

/* NAV */
header{
  position:sticky;top:0;z-index:50;
  background:rgba(245,247,243,0.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color 0.2s ease, box-shadow 0.2s ease;
}
header.scrolled{border-color:var(--line);box-shadow:0 2px 16px rgba(22,50,79,0.05);}
.nav-row{display:flex;align-items:center;justify-content:space-between;padding:18px 0;}
.brand{display:flex;align-items:center;gap:10px;}
.brand span{font-family:var(--font-display);font-weight:700;font-size:1.05rem;}
.nav-links{display:flex;align-items:center;gap:32px;}
.nav-links a{font-weight:600;font-size:0.92rem;color:var(--ink-soft);transition:color 0.15s ease;}
.nav-links a:hover{color:var(--teal-deep);}
.nav-cta{display:flex;align-items:center;gap:18px;}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:6px;}
.nav-mobile{display:none;flex-direction:column;gap:2px;padding:8px 0 20px;}
.nav-mobile a{padding:12px 0;border-top:1px solid var(--line);font-weight:600;color:var(--ink);}
@media (max-width:860px){
  .nav-links{display:none;}
  .nav-cta .btn-primary{display:none;}
  .nav-toggle{display:block;}
  header.open .nav-mobile{display:flex;}
}

/* HERO */
.hero{padding:72px 0 96px;}
.hero-grid{display:grid;grid-template-columns:1.05fr 0.95fr;gap:64px;align-items:center;}
@media (max-width:920px){.hero-grid{grid-template-columns:1fr;gap:48px;}}
.hero h1{font-size:clamp(2.3rem,4.6vw,3.4rem);line-height:1.06;margin:16px 0 20px;}
.hero p.lede{font-size:1.1rem;color:var(--ink-soft);max-width:480px;margin:0 0 32px;}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;}

/* DECODER CARD */
.decoder{
  background:var(--paper-raised);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
  padding:28px;
}
.decoder-label{font-family:var(--font-mono);font-size:0.68rem;letter-spacing:0.1em;text-transform:uppercase;color:var(--ink-soft);margin-bottom:18px;}
.decoder-docs{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px;}
.doc-card{border-radius:var(--radius-md);padding:18px 16px;border:1px solid var(--line);}
.doc-card.eob{background:var(--teal-pale);}
.doc-card.bill{background:var(--rose-pale);}
.doc-card .doc-title{font-family:var(--font-mono);font-size:0.68rem;font-weight:600;letter-spacing:0.06em;text-transform:uppercase;margin-bottom:14px;}
.doc-card.eob .doc-title{color:var(--teal-deep);}
.doc-card.bill .doc-title{color:var(--rose);}
.doc-card .doc-line{display:flex;justify-content:space-between;font-size:0.78rem;color:var(--ink-soft);margin-bottom:8px;}
.doc-card .doc-amount-label{font-size:0.78rem;color:var(--ink-soft);margin-top:10px;}
.doc-card .doc-amount{font-family:var(--font-mono);font-weight:600;font-size:1.9rem;margin-top:2px;}
.doc-card.eob .doc-amount{color:var(--teal-deep);}
.doc-card.bill .doc-amount{color:var(--rose);}
.vs-mark{
  width:34px;height:34px;border-radius:50%;background:var(--ink);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-size:0.72rem;font-weight:600;
  flex-shrink:0;
}
.decoder-toggle{
  width:100%;margin-top:20px;background:var(--gold-pale);border:1px solid var(--gold);
  color:var(--ink);font-family:var(--font-body);font-weight:600;font-size:0.92rem;
  padding:13px 18px;border-radius:var(--radius-sm);cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  transition:background 0.15s ease;
}
.decoder-toggle:hover{background:var(--gold);}
.decoder-toggle:focus-visible{outline:2px solid var(--teal-deep);outline-offset:2px;}
.decoder-toggle .chev{transition:transform 0.25s ease;}
.decoder-toggle.open .chev{transform:rotate(180deg);}
.decoder-reveal{
  max-height:0;overflow:hidden;transition:max-height 0.35s ease, margin 0.35s ease;
}
.decoder-reveal.open{max-height:220px;margin-top:16px;}
.decoder-reveal-inner{font-size:0.92rem;color:var(--ink-soft);line-height:1.65;padding-top:2px;}
.decoder-reveal-inner strong{color:var(--ink);}
@media (max-width:520px){
  .decoder-docs{grid-template-columns:1fr;}
  .vs-mark{margin:2px auto;}
}

section{padding:88px 0;}
@media (max-width:640px){section{padding:64px 0;}}
.section-head{max-width:640px;margin-bottom:44px;}
.section-head h2{font-size:clamp(1.7rem,3vw,2.3rem);margin-top:14px;}
.section-head p{color:var(--ink-soft);font-size:1.02rem;margin-top:12px;}

.glossary{background:var(--paper-raised);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px;}
.chip{
  font-family:var(--font-mono);font-size:0.82rem;font-weight:600;
  padding:10px 20px;border-radius:999px;border:1.5px solid var(--line);
  background:transparent;color:var(--ink-soft);cursor:pointer;
  transition:background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.chip:hover{border-color:var(--teal);color:var(--teal-deep);}
.chip.active{background:var(--gold);border-color:var(--gold);color:var(--ink);}
.chip:focus-visible{outline:2px solid var(--teal-deep);outline-offset:2px;}
.definition{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:32px;
}
.definition .term{font-family:var(--font-display);font-weight:700;font-size:1.4rem;margin-bottom:12px;}
.def-panel{animation:panelFadeIn 0.3s ease;}
@keyframes panelFadeIn{from{opacity:0;transform:translateY(4px);}to{opacity:1;transform:translateY(0);}}
.definition p{margin:0;font-size:1.02rem;}
.definition .practice{margin-top:16px;padding-top:16px;border-top:1px dashed var(--line);color:var(--ink-soft);font-size:0.94rem;}
.definition .practice strong{color:var(--ink);font-weight:600;}

/* BOOK */
.book-grid{display:grid;grid-template-columns:0.85fr 1.15fr;gap:64px;align-items:center;}
@media (max-width:880px){.book-grid{grid-template-columns:1fr;gap:40px;}}
.book-mock{
  max-width:300px;
  margin:0 auto;
  transform:rotate(-1.2deg);
  box-shadow:0 20px 40px rgba(94,42,42,0.28);
  border-radius:var(--radius-md);
  overflow:hidden;
}
.book-mock img{
  width:100%;
  height:auto;
  display:block;
}
@media (min-width:881px){.book-mock{margin:0;}}
.book-copy ul{margin:22px 0 30px;display:flex;flex-direction:column;gap:12px;}
.book-copy li{display:flex;align-items:flex-start;gap:10px;font-size:0.98rem;color:var(--ink-soft);}
.book-copy li svg{flex-shrink:0;margin-top:3px;}
.book-copy li strong{color:var(--ink);font-weight:600;}

/* IG */
.ig-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
@media (max-width:760px){.ig-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:480px){.ig-grid{grid-template-columns:1fr;}}
.ig-card{
  border-radius:var(--radius-md);padding:26px 22px;min-height:190px;
  display:flex;flex-direction:column;justify-content:space-between;
  transition:transform 0.2s ease;
}
.ig-card:hover{transform:translateY(-4px);}
.ig-card.c1{background:var(--ink);color:#F5F7F3;}
.ig-card.c2{background:var(--teal-pale);color:var(--teal-deep);}
.ig-card.c3{background:var(--gold-pale);color:#8A5B14;}
.ig-card.c4{background:var(--paper-raised);color:var(--ink);border:1px solid var(--line);}
.ig-card .ig-q{font-family:var(--font-display);font-weight:600;font-size:1.12rem;line-height:1.28;}
.ig-card .ig-tag{font-family:var(--font-mono);font-size:0.68rem;letter-spacing:0.08em;text-transform:uppercase;opacity:0.7;margin-top:18px;}

/* CONTACT */
.contact-form{max-width:520px;display:flex;flex-direction:column;gap:20px;}
.form-row{display:flex;flex-direction:column;gap:8px;}
.form-row label{font-family:var(--font-mono);font-size:0.7rem;letter-spacing:0.08em;text-transform:uppercase;color:var(--ink-soft);}
.form-row input,.form-row textarea{
  font-family:var(--font-body);
  font-size:0.98rem;
  color:var(--ink);
  background:var(--paper-raised);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:12px 14px;
  resize:vertical;
}
.form-row input:focus,.form-row textarea:focus{outline:2px solid var(--teal-deep);outline-offset:1px;border-color:var(--teal-deep);}
.contact-form .btn{align-self:flex-start;}
.contact-note{font-size:0.86rem;color:var(--ink-soft);margin:0;}

/* ABOUT STRIP */
.about{background:var(--ink);color:var(--paper);}
.about .wrap{text-align:center;max-width:760px;}
.about .eyebrow{color:#8FC3AF;}
.about p.statement{font-family:var(--font-display);font-weight:600;font-size:clamp(1.5rem,3vw,2rem);line-height:1.35;margin-top:18px;}
.about p.statement em{color:#E3A93B;font-style:normal;}

footer{background:var(--ink-soft);background:#102336;color:#C9D5DD;padding:64px 0 32px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,0.12);}
@media (max-width:760px){.footer-grid{grid-template-columns:1fr 1fr;}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand span{font-family:var(--font-display);font-weight:700;color:#fff;font-size:1rem;}
.footer-tag{font-size:0.88rem;color:#8FA3B3;max-width:260px;}
.footer-col h3{font-family:var(--font-mono);font-size:0.7rem;letter-spacing:0.1em;text-transform:uppercase;color:#8FA3B3;margin:0 0 14px;}
.footer-col a{display:block;font-size:0.92rem;padding:6px 0;color:#DCE6EB;transition:color 0.15s ease;}
.footer-col a:hover{color:#E3A93B;}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-top:24px;font-size:0.8rem;color:#7893A3;}

.reveal{opacity:0;transform:translateY(16px);transition:opacity 0.6s ease, transform 0.6s ease;}
.reveal.in{opacity:1;transform:translateY(0);}