:root{
  --ink:#16241c;
  --paper:#f1ecde;
  --paper-2:#e8e1cc;
  --card:#fbf8ef;
  --green:#0f3d2e;
  --green-light:#1c5940;
  --green-pale:#dbe8e0;
  --gold:#b8862e;
  --gold-light:#d9ad55;
  --rule:#c9bfa0;
  --stamp:#a23b2e;
  --display: 'Roboto Slab', serif;
  --body: 'IBM Plex Sans', sans-serif;
  --mono: 'IBM Plex Mono', monospace;
}
html[data-theme="dark"]{
  --ink:#ece6d4;
  --paper:#141b16;
  --paper-2:#1c251e;
  --card:#1a2119;
  --green:#3fae82;
  --green-light:#5fc79b;
  --green-pale:#1f342a;
  --gold:#e0b563;
  --gold-light:#f0cd85;
  --rule:#3a4238;
  --stamp:#e07059;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:15px;
  line-height:1.6;
  transition:background .2s, color .2s;
}
a{color:inherit;}
img{max-width:100%;}

/* ---------- Header / passbook cover ---------- */
header.cover{
  background:
    linear-gradient(135deg, rgba(255,255,255,0.04) 0%, rgba(0,0,0,0.12) 100%),
    var(--green);
  color:var(--paper);
  padding:38px 20px 46px;
  position:relative;
  border-bottom:2px solid var(--gold);
}
.cover-inner{
  max-width:1000px;
  margin:0 auto;
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
}
.cover-title{
  font-family:var(--display);
  font-weight:800;
  font-size:34px;
  letter-spacing:0.5px;
  margin:0;
  color:#f4ead0;
  text-shadow:0 1px 0 rgba(0,0,0,0.3);
  text-decoration:none;
  display:inline-block;
}
.cover-title span{color:var(--gold-light);}
.cover-sub{
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:1.5px;
  text-transform:uppercase;
  color:#bcd4c6;
  margin-top:6px;
}
.cover-right{display:flex; align-items:center; gap:10px;}
.cover-badge{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:1px;
  border:1px solid var(--gold-light);
  color:var(--gold-light);
  padding:6px 10px;
  border-radius:2px;
  text-transform:uppercase;
  white-space:nowrap;
}
.theme-toggle{
  font-family:var(--mono);
  font-size:12px;
  border:1px solid var(--gold-light);
  background:transparent;
  color:var(--gold-light);
  padding:6px 12px;
  border-radius:2px;
  cursor:pointer;
}
.theme-toggle:hover{background:rgba(255,255,255,0.08);}
.perforation{
  position:absolute;
  left:0; right:0; bottom:-9px;
  height:18px;
  background-image:radial-gradient(circle at 9px 9px, var(--paper) 8px, transparent 8.5px);
  background-size:24px 18px;
  background-repeat:repeat-x;
}

/* ---------- Nav ---------- */
nav.tabs{
  position:sticky; top:0; z-index:20;
  background:var(--paper);
  border-bottom:1px solid var(--rule);
  padding:14px 20px 0;
}
.tabs-inner{
  max-width:1000px;
  margin:0 auto;
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  padding-bottom:12px;
  align-items:center;
}
.chip{
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:0.5px;
  text-transform:uppercase;
  padding:7px 14px;
  border:1px solid var(--green);
  border-radius:999px;
  cursor:pointer;
  background:transparent;
  color:var(--green);
  transition:background .15s, color .15s;
}
.chip:hover{background:var(--green-pale);}
.chip.active{background:var(--green); color:var(--paper);}
.back-link{
  font-family:var(--mono);
  font-size:12.5px;
  text-decoration:none;
  color:var(--green);
  display:inline-flex; align-items:center; gap:6px;
  cursor:pointer;
  padding-bottom:12px;
  background:none; border:none;
}
.back-link:hover{text-decoration:underline;}

main{max-width:1000px; margin:0 auto; padding:34px 20px 70px;}

/* ---------- Hero / search ---------- */
.hero{padding:8px 0 30px;}
.hero-title{
  font-family:var(--display); font-size:26px; font-weight:700;
  color:var(--green); margin:0 0 8px;
}
.hero-sub{color:#6b7368; margin:0 0 20px; max-width:640px; font-size:14.5px;}
html[data-theme="dark"] .hero-sub{color:#9aa89f;}
.search-box{
  display:flex; gap:0; max-width:560px; border:1px solid var(--rule);
  background:var(--card);
}
.search-box input{
  flex:1; border:none; background:transparent; padding:13px 14px;
  font-family:var(--body); font-size:14.5px; color:var(--ink);
}
.search-box input:focus{outline:none;}
.search-box .search-icon{
  padding:0 16px; display:flex; align-items:center; color:var(--gold);
  font-family:var(--mono); font-size:13px;
}

.section-title{
  font-family:var(--display); font-size:20px; font-weight:600;
  margin:0 0 4px; color:var(--green);
}
.section-sub{color:#6b7368; margin:0 0 22px; font-size:13.5px; max-width:640px;}
html[data-theme="dark"] .section-sub{color:#9aa89f;}
.section{margin-top:44px;}

/* ---------- Home grid ---------- */
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(260px,1fr));
  gap:16px;
}
.entry-card{
  background:var(--card);
  border:1px solid var(--rule);
  border-left:4px solid var(--green);
  padding:18px 18px 16px;
  cursor:pointer;
  transition:transform .12s, box-shadow .12s, border-color .12s;
  text-decoration:none;
  display:block;
  color:var(--ink);
}
.entry-card:hover{
  transform:translateY(-2px);
  box-shadow:3px 4px 0 var(--gold-light);
  border-left-color:var(--gold);
}
.entry-no{
  font-family:var(--mono); font-size:11px; color:var(--gold);
  letter-spacing:1px; text-transform:uppercase;
}
.entry-name{
  font-family:var(--display); font-weight:700; font-size:18px;
  margin:6px 0 6px; color:var(--green);
}
.entry-desc{font-size:13px; color:#6b7368; margin:0;}
html[data-theme="dark"] .entry-desc{color:#9aa89f;}

/* popular strip */
.popular-strip{display:flex; gap:10px; flex-wrap:wrap; margin-bottom:8px;}
.popular-pill{
  font-family:var(--mono); font-size:12.5px; padding:8px 14px;
  background:var(--green-pale); border:1px solid var(--green);
  color:var(--green-light); text-decoration:none; cursor:pointer;
  border-radius:2px;
}
html[data-theme="dark"] .popular-pill{color:var(--green-light);}
.popular-pill:hover{background:var(--green); color:var(--paper);}

/* ---------- Why / testimonials ---------- */
.why-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:18px;}
.why-card{background:var(--card); border:1px solid var(--rule); padding:18px;}
.why-card .why-mark{font-family:var(--mono); color:var(--gold); font-size:12px; letter-spacing:1px;}
.why-card h3{font-family:var(--display); color:var(--green); font-size:16px; margin:8px 0 6px;}
.why-card p{font-size:13px; color:#6b7368; margin:0;}
html[data-theme="dark"] .why-card p{color:#9aa89f;}

.testimonial-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:18px;}
.testimonial-card{background:var(--card); border:1px solid var(--rule); border-top:3px solid var(--gold); padding:18px;}
.testimonial-card p.quote{font-size:13.5px; font-style:italic; margin:0 0 12px; color:var(--ink);}
.testimonial-card .who{font-family:var(--mono); font-size:11.5px; color:var(--gold); text-transform:uppercase; letter-spacing:0.5px;}

/* ---------- FAQ accordion ---------- */
.faq-item{border-bottom:1px solid var(--rule); padding:4px 0;}
.faq-item summary{
  font-family:var(--display); font-weight:600; font-size:14.5px;
  color:var(--green); cursor:pointer; padding:12px 0; list-style:none;
  display:flex; justify-content:space-between; align-items:center;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+"; color:var(--gold); font-size:18px;}
.faq-item[open] summary::after{content:"–";}
.faq-item p{font-size:13.5px; color:#6b7368; margin:0 0 14px; padding-right:20px;}
html[data-theme="dark"] .faq-item p{color:#9aa89f;}

/* ---------- Newsletter ---------- */
.newsletter{
  background:var(--green); color:var(--paper); padding:28px; text-align:center;
}
.newsletter h3{font-family:var(--display); margin:0 0 6px; font-size:19px;}
.newsletter p{font-size:13px; color:#bcd4c6; margin:0 0 16px;}
.newsletter-form{display:flex; gap:0; max-width:420px; margin:0 auto; flex-wrap:wrap; justify-content:center;}
.newsletter-form input{
  flex:1; min-width:200px; padding:11px 12px; border:none; font-family:var(--body); font-size:13.5px;
}
.newsletter-form button{
  padding:11px 18px; background:var(--gold); color:var(--green); border:none;
  font-family:var(--mono); font-size:12.5px; text-transform:uppercase; letter-spacing:0.5px; cursor:pointer;
}
.newsletter-form button:hover{background:var(--gold-light);}
.newsletter-note{font-size:11px; color:#9fc0ac; margin-top:10px;}

/* ---------- Calculator view ---------- */
.breadcrumb{font-family:var(--mono); font-size:11.5px; color:#8a927f; margin-bottom:14px;}
.breadcrumb a{color:var(--green); text-decoration:none;}
.breadcrumb a:hover{text-decoration:underline;}
.calc-title{
  font-family:var(--display); font-weight:700; font-size:26px;
  color:var(--green); margin:0 0 4px;
}
.calc-desc{color:#6b7368; margin:0 0 26px; font-size:14px; max-width:640px;}
html[data-theme="dark"] .calc-desc{color:#9aa89f;}

.calc-layout{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:28px;
  align-items:start;
}
@media (max-width:760px){ .calc-layout{grid-template-columns:1fr;} }

.deposit-slip{
  background:var(--card);
  border:1px solid var(--rule);
  padding:22px;
  position:relative;
}
.deposit-slip::before{
  content:"INPUT";
  position:absolute; top:-10px; left:16px;
  background:var(--gold); color:var(--paper);
  font-family:var(--mono); font-size:10.5px; letter-spacing:1.5px;
  padding:2px 10px;
}
.field{margin-bottom:16px;}
.field label{
  display:block; font-family:var(--mono); font-size:11.5px;
  text-transform:uppercase; letter-spacing:0.8px; color:var(--green);
  margin-bottom:6px;
}
.field input, .field select{
  width:100%; padding:9px 10px; font-family:var(--mono); font-size:14.5px;
  border:1px solid var(--rule); background:var(--paper); color:var(--ink);
  border-radius:2px;
}
.field input:focus, .field select:focus{outline:2px solid var(--gold-light); outline-offset:1px;}
.field-hint{font-size:11.5px; color:#8a927f; margin-top:4px;}

.ledger{
  background:var(--card);
  border:1px dashed var(--rule);
  padding:22px;
  position:relative;
}
.ledger::before{
  content:"STATEMENT";
  position:absolute; top:-10px; left:16px;
  background:var(--green); color:var(--paper);
  font-family:var(--mono); font-size:10.5px; letter-spacing:1.5px;
  padding:2px 10px;
}
.ledger-row{
  display:flex; justify-content:space-between; align-items:baseline;
  padding:8px 0; border-bottom:1px dotted var(--rule);
  font-size:13.5px;
}
.ledger-row .label{color:#6b7368;}
html[data-theme="dark"] .ledger-row .label{color:#9aa89f;}
.ledger-row .amt{font-family:var(--mono); font-weight:500;}
.ledger-row.negative .amt{color:var(--stamp);}
.stamp-box{
  margin-top:18px; padding:16px;
  background:var(--green-pale);
  border:1px solid var(--green);
  display:flex; justify-content:space-between; align-items:center;
  flex-wrap:wrap; gap:8px;
}
.stamp-label{
  font-family:var(--mono); font-size:12px; text-transform:uppercase;
  letter-spacing:1px; color:var(--green-light);
}
.stamp-amt{
  font-family:var(--display); font-weight:800; font-size:24px; color:var(--green);
}
.note{
  font-size:12px; color:#8a927f; margin-top:16px; line-height:1.5;
}

/* extra calc-page sections */
.calc-extra{margin-top:40px;}
.calc-extra h2{font-family:var(--display); font-size:18px; color:var(--green); margin:0 0 10px;}
.formula-box{
  background:var(--card); border:1px solid var(--rule); padding:16px;
  font-family:var(--mono); font-size:13.5px; color:var(--green-light); margin-bottom:8px;
}
.example-box{font-size:13.5px; color:#6b7368;}
html[data-theme="dark"] .example-box{color:#9aa89f;}
.related-links{display:flex; flex-wrap:wrap; gap:10px;}
.related-links a{
  font-family:var(--mono); font-size:12.5px; padding:8px 14px;
  border:1px solid var(--rule); text-decoration:none; color:var(--green);
  cursor:pointer;
}
.related-links a:hover{border-color:var(--gold); color:var(--gold);}
.share-print{display:flex; gap:10px; flex-wrap:wrap; margin-top:8px;}
.share-print button, .share-print a{
  font-family:var(--mono); font-size:12px; padding:9px 16px;
  border:1px solid var(--green); background:transparent; color:var(--green);
  cursor:pointer; text-decoration:none; display:inline-flex; align-items:center; gap:6px;
}
.share-print button:hover, .share-print a:hover{background:var(--green); color:var(--paper);}
.byline{font-family:var(--mono); font-size:11.5px; color:#8a927f; margin-top:30px; border-top:1px solid var(--rule); padding-top:14px;}

/* ---------- Blog ---------- */
.blog-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:18px;}
.blog-card{background:var(--card); border:1px solid var(--rule); padding:18px; text-decoration:none; color:var(--ink); display:block;}
.blog-card .cat{font-family:var(--mono); font-size:11px; color:var(--gold); text-transform:uppercase;}
.blog-card h3{font-family:var(--display); color:var(--green); font-size:17px; margin:8px 0 6px;}
.blog-card p{font-size:13px; color:#6b7368; margin:0;}
.article{max-width:720px; margin:0 auto;}
.article h1{font-family:var(--display); color:var(--green); font-size:28px;}
.article .meta{font-family:var(--mono); font-size:12px; color:#8a927f; margin-bottom:24px;}
.article h2{font-family:var(--display); color:var(--green); font-size:19px; margin-top:30px;}
.article p, .article li{font-size:14.5px; color:var(--ink); line-height:1.75;}

/* ---------- Legal / prose pages ---------- */
.prose{max-width:720px;}
.prose h1{font-family:var(--display); color:var(--green); font-size:26px;}
.prose h2{font-family:var(--display); color:var(--green); font-size:18px; margin-top:26px;}
.prose p, .prose li{font-size:14px; color:var(--ink); line-height:1.7;}
.prose .updated{font-family:var(--mono); font-size:11.5px; color:#8a927f;}

/* ---------- Footer ---------- */
footer.site-footer{
  border-top:1px solid var(--rule); background:var(--paper-2); margin-top:60px;
}
.footer-inner{
  max-width:1000px; margin:0 auto; padding:40px 20px 20px;
  display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:24px;
}
@media (max-width:700px){ .footer-inner{grid-template-columns:1fr 1fr;} }
.footer-brand{font-family:var(--display); font-weight:700; color:var(--green); font-size:18px;}
.footer-tag{font-size:12.5px; color:#8a927f; margin-top:6px; max-width:220px;}
.footer-col h4{font-family:var(--mono); font-size:11.5px; text-transform:uppercase; letter-spacing:1px; color:var(--gold); margin:0 0 12px;}
.footer-col a{display:block; font-size:13px; color:var(--ink); text-decoration:none; margin-bottom:8px;}
.footer-col a:hover{color:var(--green);}
.footer-bottom{
  max-width:1000px; margin:0 auto; padding:16px 20px 30px;
  font-family:var(--mono); font-size:11px; color:#8a927f;
  border-top:1px solid var(--rule);
}

@media print{
  nav.tabs, .theme-toggle, .cover-badge, footer.site-footer, .share-print, .newsletter{display:none !important;}
  header.cover{background:none !important; color:var(--ink) !important; border-bottom:2px solid var(--ink);}
  .cover-title, .cover-sub{color:var(--ink) !important;}
}