:root{
    --bg:#161d15;
    --bg-alt:#1d2519;
    --panel:#212b1d;
    --ivory:#f2ecdd;
    --ivory-dim:#c9c3ac;
    --horn:#b08d57;
    --amber:#d3a625;
    --moss:#4a5d3a;
    --rule: rgba(242,236,221,0.14);
    --rule-strong: rgba(242,236,221,0.28);
    --radius: 2px;
    --maxw: 1180px;
  }

  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ivory);
    font-family:'Inter', sans-serif;
    font-size:16px;
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,.display{
    font-family:'Fraunces', serif;
    font-weight:600;
    letter-spacing:-0.01em;
    margin:0;
  }
  .mono{
    font-family:'JetBrains Mono', monospace;
    letter-spacing:0.02em;
  }
  a{color:inherit;}
  img,svg{display:block;max-width:100%;}
  .wrap{
    max-width:var(--maxw);
    margin:0 auto;
    padding:0 28px;
  }
  ::selection{background:var(--amber);color:#161d15;}

  /* focus visibility */
  a:focus-visible, button:focus-visible, input:focus-visible{
    outline:2px solid var(--amber);
    outline-offset:3px;
  }

  @media (prefers-reduced-motion: reduce){
    *{animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important;}
  }

  /* ---------- NAV ---------- */
  header.site{
    position:sticky; top:0; z-index:40;
    background:rgba(22,29,21,0.88);
    backdrop-filter:blur(8px);
    border-bottom:1px solid var(--rule);
  }
  nav.wrap{
    display:flex; align-items:center; justify-content:space-between;
    padding-top:16px; padding-bottom:16px;
  }
  .logo{
    display:flex; align-items:center; gap:10px;
    font-family:'Fraunces', serif; font-weight:600; font-size:1.15rem;
    text-decoration:none; color:var(--ivory);
  }
  .logo svg{width:26px;height:26px;flex:none;}
  .nav-links{
    display:flex; gap:28px; list-style:none; margin:0; padding:0;
  }
  .nav-links a{
    text-decoration:none; font-size:0.86rem; letter-spacing:0.04em; text-transform:uppercase;
    color:var(--ivory-dim);
    padding-bottom:3px;
    border-bottom:1px solid transparent;
    transition:color .2s, border-color .2s;
  }
  .nav-links a:hover{color:var(--amber); border-color:var(--amber);}
  .nav-toggle{
    display:none;
    background:none;border:1px solid var(--rule-strong); color:var(--ivory);
    padding:8px 10px; border-radius:var(--radius); cursor:pointer;
    font-family:'JetBrains Mono',monospace; font-size:0.8rem;
  }

  @media (max-width:760px){
    .nav-links{
      position:absolute; top:100%; left:0; right:0;
      background:var(--bg-alt); flex-direction:column; gap:0;
      border-bottom:1px solid var(--rule);
      max-height:0; overflow:hidden; transition:max-height .3s ease;
    }
    .nav-links.open{max-height:300px;}
    .nav-links a{
      display:block; padding:16px 28px; border-bottom:1px solid var(--rule); width:100%;
    }
    .nav-toggle{display:block;}
  }

  /* ---------- HERO ---------- */
  .hero{
    position:relative;
    padding:96px 0 76px;
    overflow:hidden;
    border-bottom:1px solid var(--rule);
    background:
      radial-gradient(ellipse at 80% -10%, rgba(211,166,37,0.10), transparent 55%),
      var(--bg);
  }
  .hero .wrap{
    display:grid; grid-template-columns:1.1fr 0.9fr; gap:40px; align-items:center;
  }
  .eyebrow{
    display:inline-flex; align-items:center; gap:10px;
    font-family:'JetBrains Mono',monospace; font-size:0.78rem; letter-spacing:0.12em; text-transform:uppercase;
    color:var(--amber); margin-bottom:22px;
  }
  .eyebrow::before{content:"";width:26px;height:1px;background:var(--amber);}
  .hero h1{
    font-size:clamp(2.4rem, 5vw, 3.8rem);
    line-height:1.04;
    color:var(--ivory);
  }
  .hero h1 em{font-style:italic; color:var(--horn);}
  .hero p.lede{
    margin-top:22px; max-width:46ch; color:var(--ivory-dim); font-size:1.05rem;
  }
  .hero .cta-row{
    margin-top:34px; display:flex; gap:16px; flex-wrap:wrap; align-items:center;
  }
  .btn{
    display:inline-block; padding:13px 22px; border-radius:var(--radius);
    font-family:'JetBrains Mono',monospace; font-size:0.82rem; letter-spacing:0.04em; text-transform:uppercase;
    text-decoration:none; cursor:pointer; border:1px solid var(--amber);
    background:var(--amber); color:#1b1607; font-weight:500;
    transition:transform .15s ease, background .2s ease;
  }
  .btn:hover{transform:translateY(-2px);}
  .btn.ghost{background:transparent; color:var(--ivory); border-color:var(--rule-strong);}
  .btn.ghost:hover{border-color:var(--amber); color:var(--amber);}

  .hero-art{position:relative; aspect-ratio:1/1; max-width:420px; margin:0 auto;}
  .hero-art svg{width:100%;height:100%;}
  .hero-art .horn-path{
    fill:none; stroke:var(--horn); stroke-width:2.2; stroke-linecap:round;
    stroke-dasharray:900; stroke-dashoffset:900;
    animation:draw 2.6s ease forwards .3s;
  }
  .hero-art .horn-path.alt{stroke:var(--amber); animation-delay:.7s;}
  .hero-art .ring{fill:none; stroke:var(--rule-strong); stroke-width:1;}
  @keyframes draw{ to{stroke-dashoffset:0;} }

  /* ---------- MARQUEE / FACT TICKER ---------- */
  .ticker{
    border-bottom:1px solid var(--rule);
    background:var(--bg-alt);
    overflow:hidden;
    white-space:nowrap;
    padding:13px 0;
  }
  .ticker-track{
    display:inline-flex;
    animation:ticker 38s linear infinite;
  }
  .ticker-track span{
    font-family:'JetBrains Mono',monospace; font-size:0.82rem; color:var(--ivory-dim);
    padding:0 34px; position:relative;
  }
  .ticker-track span::after{
    content:"◆"; position:absolute; right:-4px; top:0; color:var(--amber); font-size:0.6rem;
  }
  @keyframes ticker{ from{transform:translateX(0);} to{transform:translateX(-50%);} }

  /* ---------- SECTION SHELL ---------- */
  section{padding:88px 0;}
  .section-head{
    display:flex; justify-content:space-between; align-items:flex-end; gap:24px;
    margin-bottom:48px; flex-wrap:wrap;
    border-bottom:1px solid var(--rule); padding-bottom:26px;
  }
  .section-head .tag{
    font-family:'JetBrains Mono',monospace; font-size:0.75rem; color:var(--amber);
    text-transform:uppercase; letter-spacing:0.12em; margin-bottom:10px; display:block;
  }
  .section-head h2{font-size:clamp(1.6rem,3vw,2.3rem);}
  .section-head p{color:var(--ivory-dim); max-width:48ch; margin:10px 0 0;}

  /* ---------- INTRO / DEFINITIONS ---------- */
  .intro-grid{
    display:grid; grid-template-columns:repeat(3,1fr); gap:28px;
  }
  .intro-card{
    border:1px solid var(--rule); padding:26px; border-radius:var(--radius);
    background:var(--panel);
  }
  .intro-card .num{font-family:'JetBrains Mono',monospace; color:var(--amber); font-size:0.8rem;}
  .intro-card h3{margin-top:12px; font-size:1.25rem;}
  .intro-card p{color:var(--ivory-dim); font-size:0.95rem; margin-top:10px;}

  @media (max-width:820px){ .intro-grid{grid-template-columns:1fr;} }

  /* ---------- FILTER BAR ---------- */
  .filter-bar{
    display:flex; gap:10px; flex-wrap:wrap; margin-bottom:40px;
  }
  .filter-btn{
    font-family:'JetBrains Mono',monospace; font-size:0.78rem; letter-spacing:0.03em;
    padding:9px 16px; border-radius:20px; border:1px solid var(--rule-strong);
    background:transparent; color:var(--ivory-dim); cursor:pointer;
    transition:all .18s ease; text-transform:uppercase;
  }
  .filter-btn:hover{color:var(--ivory); border-color:var(--ivory-dim);}
  .filter-btn.active{background:var(--amber); border-color:var(--amber); color:#1b1607;}

  /* ---------- SPECIMEN GRID ---------- */
  .grid{
    display:grid; grid-template-columns:repeat(3, 1fr); gap:26px;
  }
  @media (max-width:980px){ .grid{grid-template-columns:repeat(2,1fr);} }
  @media (max-width:620px){ .grid{grid-template-columns:1fr;} }

  .card{
    border:1px solid var(--rule); background:var(--panel); border-radius:var(--radius);
    overflow:hidden; cursor:pointer;
    transition:border-color .2s ease, transform .2s ease;
    opacity:0; transform:translateY(18px);
  }
  .card.in-view{ animation:rise .6s ease forwards; }
  @keyframes rise{ to{opacity:1; transform:translateY(0);} }
  .card:hover{border-color:var(--horn); transform:translateY(-3px);}
  .card.hidden-by-filter{display:none;}

  .plate{
    position:relative; aspect-ratio:4/3; background:
      repeating-linear-gradient(0deg, transparent, transparent 27px, rgba(242,236,221,0.045) 28px),
      repeating-linear-gradient(90deg, transparent, transparent 27px, rgba(242,236,221,0.045) 28px),
      var(--bg);
    border-bottom:1px solid var(--rule);
    display:flex; align-items:center; justify-content:center;
    padding:18px;
  }
  .plate .fig{
    position:absolute; top:12px; left:14px;
    font-family:'JetBrains Mono',monospace; font-size:0.72rem; color:var(--amber);
  }
  .plate .cat{
    position:absolute; top:12px; right:14px;
    font-family:'JetBrains Mono',monospace; font-size:0.68rem; color:var(--ivory-dim);
    text-transform:uppercase; letter-spacing:0.06em;
    border:1px solid var(--rule-strong); padding:3px 8px; border-radius:12px;
  }
  .plate svg{width:78%; height:78%;}
  .plate .horn-path{
    fill:none; stroke:var(--horn); stroke-width:2.4; stroke-linecap:round;
    stroke-dasharray:520; stroke-dashoffset:520;
  }
  .card.in-view .horn-path{ animation:draw 1.6s ease forwards .15s; }

  .card-body{padding:20px 22px 24px;}
  .card-body .common{font-size:1.15rem;}
  .card-body .sci{
    display:block; font-size:0.78rem; color:var(--ivory-dim); font-style:italic; margin-top:3px;
  }
  .stats-row{
    display:flex; gap:14px; margin-top:14px; flex-wrap:wrap;
  }
  .stat{
    font-family:'JetBrains Mono',monospace; font-size:0.7rem; color:var(--ivory-dim);
  }
  .stat b{color:var(--ivory); display:block; font-size:0.86rem; font-family:'Inter',sans-serif; font-weight:600;}
  .card-body .desc{
    margin-top:14px; font-size:0.88rem; color:var(--ivory-dim);
    max-height:0; overflow:hidden; transition:max-height .35s ease, margin-top .35s ease;
  }
  .card.expanded .desc{max-height:220px; margin-top:14px;}
  .expand-hint{
    margin-top:14px; font-family:'JetBrains Mono',monospace; font-size:0.72rem; color:var(--amber);
    text-transform:uppercase; letter-spacing:0.04em;
  }

  /* ---------- HORN VS ANTLER ---------- */
  .tabs{display:flex; gap:0; border:1px solid var(--rule-strong); border-radius:var(--radius); overflow:hidden; width:max-content; margin-bottom:34px;}
  .tab-btn{
    font-family:'JetBrains Mono',monospace; font-size:0.8rem; text-transform:uppercase; letter-spacing:0.05em;
    padding:12px 26px; background:transparent; color:var(--ivory-dim); border:none; cursor:pointer;
    border-right:1px solid var(--rule-strong);
  }
  .tab-btn:last-child{border-right:none;}
  .tab-btn.active{background:var(--horn); color:#1b1607;}
  .tab-panel{display:none;}
  .tab-panel.active{display:grid; grid-template-columns:1fr 1fr; gap:40px;}
  @media (max-width:760px){ .tab-panel.active{grid-template-columns:1fr;} }
  .tab-panel .col h3{font-size:1.3rem; margin-bottom:14px;}
  .tab-panel ul{padding-left:18px; color:var(--ivory-dim); font-size:0.94rem;}
  .tab-panel li{margin-bottom:10px;}
  .tab-panel .col{border:1px solid var(--rule); background:var(--panel); padding:26px; border-radius:var(--radius);}

  /* ---------- MEASURE / SLIDER ---------- */
  .measure{
    border:1px solid var(--rule); background:var(--panel); padding:34px; border-radius:var(--radius);
  }
  .measure-row{display:flex; align-items:center; gap:18px; margin-bottom:16px;}
  .measure-row label{width:150px; font-size:0.85rem; color:var(--ivory-dim); flex:none;}
  .bar-track{flex:1; height:10px; background:var(--bg); border-radius:6px; position:relative; border:1px solid var(--rule);}
  .bar-fill{height:100%; background:linear-gradient(90deg, var(--moss), var(--amber)); border-radius:6px; transition:width .5s ease;}
  .measure-row .val{width:70px; text-align:right; font-family:'JetBrains Mono',monospace; font-size:0.8rem; color:var(--amber); flex:none;}
  input[type=range]{
    width:100%; accent-color:var(--amber); margin-top:22px;
  }
  .measure-select{
    background:var(--bg); color:var(--ivory); border:1px solid var(--rule-strong);
    font-family:'JetBrains Mono',monospace; font-size:0.82rem; padding:9px 12px; border-radius:var(--radius);
    margin-bottom:24px;
  }

  /* ---------- FOOTER ---------- */
  footer{
    border-top:1px solid var(--rule); padding:56px 0 40px; background:var(--bg-alt);
  }
  footer .wrap{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:20px;}
  footer .fine{color:var(--ivory-dim); font-size:0.82rem;}
  .foot-links{display:flex; gap:20px; list-style:none; padding:0; margin:0;}
  .foot-links a{font-size:0.82rem; color:var(--ivory-dim); text-decoration:none;}
  .foot-links a:hover{color:var(--amber);}