@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  --ink:#16233D;
  --ink-soft:#5B6472;
  --paper:#ECE8DD;
  --paper-raised:#F6F3EA;
  --line:#CFC8B3;
  --line-strong:#B7AF97;
  --gain:#1F6F4E;
  --gain-soft:#E1EBE4;
  --stamp:#B5651D;
  --stamp-soft:#F1E3D3;
  --display:'Fraunces', serif;
  --body:'Inter', sans-serif;
  --mono:'IBM Plex Mono', monospace;
  --radius:3px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:16px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button{font-family:inherit;cursor:pointer;}
.wrap{max-width:1160px;margin:0 auto;padding:0 28px;}

/* -------- topbar / ledger strip -------- */
.topbar{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:.02em;
  overflow:hidden;
  border-bottom:1px solid #0000;
}
.ticker{
  display:flex;
  white-space:nowrap;
  padding:8px 0;
}
.ticker-track{
  display:flex;
  gap:44px;
  animation:scroll 34s linear infinite;
  padding-right:44px;
}
.ticker-item{display:flex;align-items:center;gap:8px;opacity:.92;}
.ticker-item .up{color:#7FD6AE;}
.ticker-item .flat{color:#C9BFA0;}
@keyframes scroll{from{transform:translateX(0);}to{transform:translateX(-50%);}}
@media (prefers-reduced-motion:reduce){.ticker-track{animation:none;}}

/* -------- header -------- */
header.site{
  background:var(--paper-raised);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:20;
}
.nav{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 28px;max-width:1160px;margin:0 auto;
}
.logo{
  font-family:var(--display);
  font-weight:600;
  font-size:22px;
  letter-spacing:-.01em;
  display:flex;align-items:baseline;gap:2px;
}
.logo .mark{
  font-family:var(--mono);
  font-size:12px;
  color:var(--stamp);
  border:1px solid var(--stamp);
  border-radius:2px;
  padding:1px 5px;
  margin-left:6px;
  transform:translateY(-6px);
}
.navlinks{display:flex;gap:32px;font-size:14.5px;font-weight:500;}
.navlinks a{color:var(--ink-soft);border-bottom:1px solid transparent;padding-bottom:3px;transition:.15s;}
.navlinks a:hover,.navlinks a.active{color:var(--ink);border-bottom-color:var(--stamp);}
.navcta{display:flex;align-items:center;gap:18px;}
.search-btn{
  font-family:var(--mono);font-size:13px;color:var(--ink-soft);
  border:1px solid var(--line-strong);background:transparent;border-radius:var(--radius);
  padding:7px 12px;display:flex;align-items:center;gap:8px;
}

/* -------- buttons -------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:13px;font-weight:500;letter-spacing:.02em;
  padding:10px 18px;border-radius:var(--radius);border:1px solid var(--ink);
  background:var(--ink);color:var(--paper);
}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line-strong);}
.btn.stamp{background:var(--stamp);border-color:var(--stamp);color:#fff;}

/* -------- hero -------- */
.hero{padding:76px 0 60px;border-bottom:1px solid var(--line);}
.hero .eyebrow{
  font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--stamp);margin-bottom:18px;display:flex;align-items:center;gap:10px;
}
.hero .eyebrow::before{content:'';width:22px;height:1px;background:var(--stamp);}
.hero h1{
  font-family:var(--display);font-weight:600;font-size:56px;line-height:1.04;
  letter-spacing:-.015em;max-width:780px;margin:0 0 22px;
}
.hero h1 em{font-style:italic;color:var(--stamp);}
.hero p.lead{font-size:18px;color:var(--ink-soft);max-width:520px;margin:0 0 34px;}

.searchbar{
  display:flex;max-width:600px;border:1.5px solid var(--ink);border-radius:var(--radius);
  background:var(--paper-raised);overflow:hidden;
}
.searchbar input{
  flex:1;border:none;background:transparent;padding:16px 18px;font-size:15px;font-family:var(--body);color:var(--ink);
}
.searchbar input:focus{outline:none;}
.searchbar button{border:none;background:var(--ink);color:var(--paper);padding:0 22px;font-family:var(--mono);font-size:13.5px;}

/* -------- topic chips -------- */
.topics-row{padding:30px 0;border-bottom:1px solid var(--line);}
.topics-row .label{font-family:var(--mono);font-size:12px;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.06em;margin-bottom:14px;}
.chips{display:flex;flex-wrap:wrap;gap:10px;}
.chip{
  font-family:var(--mono);font-size:13px;padding:8px 14px;border:1px solid var(--line-strong);
  border-radius:20px;color:var(--ink-soft);background:var(--paper-raised);
}
.chip:hover{border-color:var(--ink);color:var(--ink);}
.chip.active{background:var(--ink);color:var(--paper);border-color:var(--ink);}

/* -------- section heading -------- */
.section{padding:56px 0;}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:30px;gap:24px;}
.section-head h2{font-family:var(--display);font-size:30px;font-weight:600;margin:0;letter-spacing:-.01em;}
.section-head .num{font-family:var(--mono);font-size:12.5px;color:var(--ink-soft);}
.section-head .sub{color:var(--ink-soft);font-size:15px;margin-top:6px;}

/* -------- index card (signature element) -------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.index-card{
  background:var(--paper-raised);border:1px solid var(--line);border-radius:var(--radius);
  position:relative;padding:26px 20px 20px;display:flex;flex-direction:column;gap:14px;
  transition:transform .15s ease, box-shadow .15s ease;
}
.index-card:hover{transform:translateY(-3px);box-shadow:0 10px 24px -14px rgba(22,35,61,.35);}
.index-card::before{
  content:'';position:absolute;top:12px;left:0;right:0;height:5px;
  background-image:radial-gradient(circle, var(--paper) 3px, transparent 3.4px);
  background-size:17px 5px;background-repeat:repeat-x;background-position:9px 0;
}
.card-top{display:flex;justify-content:space-between;align-items:flex-start;padding-top:6px;}
.card-cover{
  width:46px;height:60px;border-radius:2px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--display);font-weight:600;font-size:20px;color:#fff;
}
.card-formats{display:flex;gap:5px;}
.fmt{font-family:var(--mono);font-size:10.5px;border:1px solid var(--line-strong);border-radius:10px;padding:2px 7px;color:var(--ink-soft);}
.card-topic{font-family:var(--mono);font-size:11px;color:var(--stamp);text-transform:uppercase;letter-spacing:.04em;}
.card-title{font-family:var(--display);font-size:19px;font-weight:600;line-height:1.22;letter-spacing:-.005em;}
.card-author{font-size:13.5px;color:var(--ink-soft);}
.ledger{border-top:1px dashed var(--line-strong);padding-top:12px;display:flex;flex-direction:column;gap:7px;}
.ledger-row{display:flex;align-items:baseline;gap:6px;font-size:13px;}
.ledger-row .label{color:var(--ink-soft);white-space:nowrap;}
.ledger-row .dots{flex:1;border-bottom:1.5px dotted var(--line-strong);margin-bottom:4px;}
.ledger-row .val{font-family:var(--mono);font-weight:600;white-space:nowrap;}
.stamp-badge{
  align-self:flex-start;font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:.05em;
  color:var(--gain);border:1.5px solid var(--gain);border-radius:2px;padding:3px 9px;
  transform:rotate(-4deg);
}

/* -------- calc teaser -------- */
.calc{
  background:var(--ink);color:var(--paper);border-radius:var(--radius);
  padding:44px;display:flex;justify-content:space-between;align-items:center;gap:40px;
}
.calc h3{font-family:var(--display);font-size:26px;margin:0 0 10px;font-weight:600;}
.calc p{color:#C9CFDA;font-size:14.5px;max-width:400px;margin:0;}
.calc .figure{font-family:var(--mono);font-size:46px;color:#7FD6AE;flex-shrink:0;}
.calc .figure span{font-size:16px;display:block;color:#C9CFDA;margin-top:4px;}

/* -------- footer -------- */
footer.site{border-top:1px solid var(--line-strong);padding:40px 0;margin-top:40px;}
.foot-row{display:flex;justify-content:space-between;align-items:center;font-family:var(--mono);font-size:12.5px;color:var(--ink-soft);}
.foot-links{display:flex;gap:22px;}

/* -------- breadcrumb -------- */
.crumb{font-family:var(--mono);font-size:12.5px;color:var(--ink-soft);padding:20px 0 0;}
.crumb a:hover{color:var(--ink);}
.crumb .sep{margin:0 8px;opacity:.5;}

/* -------- filter layout (catalog) -------- */
.catalog-layout{display:grid;grid-template-columns:230px 1fr;gap:36px;padding:36px 0 70px;align-items:start;}
.filters{position:sticky;top:96px;display:flex;flex-direction:column;gap:26px;}
.filter-group .ftitle{font-family:var(--mono);font-size:11.5px;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-soft);margin-bottom:10px;}
.filter-opt{display:flex;align-items:center;gap:9px;font-size:14px;padding:5px 0;color:var(--ink);}
.filter-opt input{accent-color:var(--ink);}
.filter-count{margin-left:auto;font-family:var(--mono);font-size:11.5px;color:var(--ink-soft);}
.catalog-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px;}
.results-count{font-family:var(--mono);font-size:13px;color:var(--ink-soft);}
.sort select{font-family:var(--mono);font-size:13px;border:1px solid var(--line-strong);background:var(--paper-raised);padding:7px 10px;border-radius:var(--radius);color:var(--ink);}

/* -------- book detail -------- */
.book-hero{display:grid;grid-template-columns:220px 1fr;gap:44px;padding:32px 0 50px;border-bottom:1px solid var(--line);}
.book-cover-big{
  width:220px;height:290px;border-radius:4px;display:flex;align-items:center;justify-content:center;
  font-family:var(--display);font-size:64px;font-weight:600;color:#fff;position:relative;
}
.book-cover-big::before{
  content:'';position:absolute;top:16px;left:0;right:0;height:6px;
  background-image:radial-gradient(circle, var(--paper) 4px, transparent 4.4px);
  background-size:20px 6px;background-repeat:repeat-x;background-position:10px 0;
}
.book-topic{font-family:var(--mono);font-size:12px;color:var(--stamp);text-transform:uppercase;letter-spacing:.05em;margin-bottom:12px;}
.book-title{font-family:var(--display);font-size:42px;font-weight:600;line-height:1.06;letter-spacing:-.015em;margin:0 0 12px;}
.book-author{font-size:16px;color:var(--ink-soft);margin-bottom:18px;}
.book-author a{border-bottom:1px solid var(--line-strong);}
.book-meta-row{display:flex;gap:22px;font-family:var(--mono);font-size:12.5px;color:var(--ink-soft);margin-bottom:20px;flex-wrap:wrap;}
.book-meta-row span{display:flex;align-items:center;gap:6px;}
.book-desc{font-size:15px;color:var(--ink);max-width:640px;line-height:1.65;}

.sources{padding:44px 0;}
.source-row{
  display:grid;grid-template-columns:150px 1fr 160px 160px 130px;align-items:center;gap:18px;
  padding:20px 18px;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper-raised);margin-bottom:12px;
}
.source-name{font-family:var(--display);font-weight:600;font-size:17px;}
.source-fmt{display:flex;gap:8px;}
.source-model{font-family:var(--mono);font-size:12.5px;color:var(--ink-soft);}
.source-price{font-family:var(--mono);font-size:19px;font-weight:600;}
.source-price .old{font-size:12.5px;color:var(--ink-soft);text-decoration:line-through;font-weight:400;display:block;}
.source-row.best{border-color:var(--gain);box-shadow:0 0 0 1px var(--gain) inset;}

.similar-grid{grid-template-columns:repeat(4,1fr);}

/* -------- author page -------- */
.author-hero{display:flex;gap:32px;align-items:center;padding:44px 0;border-bottom:1px solid var(--line);}
.author-photo{
  width:120px;height:120px;border-radius:50%;background:var(--ink);color:var(--paper);
  display:flex;align-items:center;justify-content:center;font-family:var(--display);font-size:40px;flex-shrink:0;
}
.author-name{font-family:var(--display);font-size:36px;font-weight:600;margin:0 0 8px;}
.author-stat{font-family:var(--mono);font-size:12.5px;color:var(--ink-soft);display:flex;gap:18px;margin-bottom:10px;}
.author-bio{font-size:15px;color:var(--ink-soft);max-width:600px;}

/* -------- topic page -------- */
.topic-hero{padding:44px 0 30px;border-bottom:1px solid var(--line);}
.topic-hero h1{font-family:var(--display);font-size:44px;font-weight:600;margin:0 0 12px;}
.topic-hero p{color:var(--ink-soft);max-width:560px;font-size:15.5px;}
.related-topics{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px;}

@media(max-width:920px){
  .grid{grid-template-columns:repeat(2,1fr);}
  .similar-grid{grid-template-columns:repeat(2,1fr);}
  .catalog-layout{grid-template-columns:1fr;}
  .filters{position:static;flex-direction:row;flex-wrap:wrap;}
  .book-hero{grid-template-columns:1fr;}
  .book-cover-big{width:160px;height:210px;}
  .navlinks{display:none;}
  .hero h1{font-size:38px;}
  .source-row{grid-template-columns:1fr;text-align:left;gap:8px;}
  .calc{flex-direction:column;align-items:flex-start;}
}
@media(max-width:640px){
  .grid{grid-template-columns:1fr;}
  .similar-grid{grid-template-columns:1fr;}
}

/* -------- pagination -------- */
.pagination{display:flex;gap:8px;justify-content:center;margin-top:36px;flex-wrap:wrap;}
.pagination a,.pagination span{
  font-family:var(--mono);font-size:13px;padding:8px 13px;border-radius:var(--radius);
  border:1px solid var(--line-strong);color:var(--ink-soft);
}
.pagination a:hover{border-color:var(--ink);color:var(--ink);}
.pagination .current{background:var(--ink);color:var(--paper);border-color:var(--ink);}

/* -------- empty state -------- */
.empty-state{padding:60px 20px;text-align:center;color:var(--ink-soft);}
.empty-state a{color:var(--stamp);border-bottom:1px solid var(--stamp);}

/* -------- simple list card (authors, etc.) -------- */
.list-card{background:var(--paper-raised);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
.list-row{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;border-bottom:1px solid var(--line);text-decoration:none;color:inherit;}
.list-row:last-child{border-bottom:none;}
.list-row:hover{background:var(--paper);}
.text-dim{color:var(--ink-soft);font-size:13px;}