:root{
    --ink:#1c1c1e;
    --paper:#faf9f7;
    --paper-raised:#ffffff;
    --brand:#cc3300;
    --brand-tint:#fdf1ec;
    --steel:#26414f;
    --steel-tint:#eef3f4;
    --muted:#6b6b6b;
    --line:#e7e2dc;
    --radius:14px;
    --maxw:1120px;
  }

  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:"Inter", -apple-system, sans-serif;
    font-size:16px;
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3{
    font-family:"Fraunces", Georgia, serif;
    font-weight:600;
    line-height:1.08;
    margin:0;
    color:var(--ink);
  }
  a{color:inherit;}
  .wrap{max-width:var(--maxw); margin:0 auto; padding:0 28px;}
  .eyebrow{
    font-family:"IBM Plex Mono", monospace;
    font-size:12.5px;
    letter-spacing:.14em;
    text-transform:uppercase;
    color:var(--brand);
    font-weight:500;
  }
  section{padding:96px 0;}
  @media (max-width:720px){ section{padding:64px 0;} }

  /* ---------- nav ---------- */
  header{
    position:sticky; top:0; z-index:50;
    background:rgba(250,249,247,.88);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
  }
  nav.wrap{
    display:flex; align-items:center; justify-content:space-between;
    height:72px;
  }
  .brand-lockup{display:flex; align-items:center; gap:10px; font-family:"Fraunces",serif; font-weight:600; font-size:19px;}
  .brand-lockup img{height:28px; width:auto; display:block;}
  .brand-lockup .yr{color:var(--brand);}
  .navlinks{display:flex; gap:30px; align-items:center;}
  .navlinks a{
    font-size:14.5px; font-weight:500; text-decoration:none; color:var(--ink);
    opacity:.75; transition:opacity .15s;
    padding:6px 0;
  }
  .navlinks a:hover{opacity:1;}
  .navcta{
    background:var(--brand); color:#fff !important; opacity:1 !important;
    padding:9px 18px !important; border-radius:999px; font-weight:600 !important;
  }
  .navcta:hover{background:#b32d00;}
  .menu-btn{display:none; background:none; border:none; cursor:pointer; padding:8px;}
  .menu-btn span{display:block; width:22px; height:2px; background:var(--ink); margin:5px 0;}
  @media (max-width:860px){
    .navlinks{
      position:fixed; top:72px; left:0; right:0;
      background:var(--paper-raised); border-bottom:1px solid var(--line);
      flex-direction:column; align-items:flex-start; padding:18px 28px 28px;
      gap:16px; transform:translateY(-8px); opacity:0; pointer-events:none;
      transition:all .18s ease;
    }
    .navlinks.open{transform:translateY(0); opacity:1; pointer-events:auto;}
    .menu-btn{display:block;}
  }

  /* ---------- hero with reconfigurable fabric motif ---------- */
  .hero{
    position:relative; overflow:hidden;
    padding:88px 0 76px;
    border-bottom:1px solid var(--line);
  }
  .fabric{
    position:absolute; inset:0; z-index:0;
    display:grid;
    grid-template-columns:repeat(24,1fr);
    grid-template-rows:repeat(10,1fr);
    opacity:.55;
  }
  .fabric i{
    border:1px solid rgba(38,65,79,.06);
  }
  .fabric i.lit{ background:var(--brand-tint); border-color:rgba(204,51,0,.14); }
  .fabric i.lit2{ background:var(--steel-tint); border-color:rgba(38,65,79,.14); }
  @media (prefers-reduced-motion:no-preference){
    .fabric i.lit{ animation:pulse 5.5s ease-in-out infinite; }
    .fabric i.lit2{ animation:pulse2 6.5s ease-in-out infinite; }
  }
  @keyframes pulse{ 0%,100%{opacity:.5;} 50%{opacity:1;} }
  @keyframes pulse2{ 0%,100%{opacity:.4;} 50%{opacity:.9;} }

  .hero .wrap{position:relative; z-index:1;}
  .hero-inner{max-width:760px;}
  .hero .eyebrow{margin-bottom:18px;}
  .hero h1{font-size:clamp(34px,5.2vw,58px); letter-spacing:-.01em;}
  .hero h1 em{font-style:italic; color:var(--brand);}
  .hero-meta{
    margin-top:22px; display:flex; flex-wrap:wrap; gap:10px 26px;
    font-family:"IBM Plex Mono", monospace; font-size:14px; color:var(--steel);
  }
  .hero-meta b{font-weight:600;}
  .hero-lede{
    margin-top:26px; font-size:17.5px; color:#3a3a3a; max-width:620px;
  }
  .hero-ctas{margin-top:36px; display:flex; gap:14px; flex-wrap:wrap;}
  .btn{
    display:inline-flex; align-items:center; gap:8px;
    padding:13px 24px; border-radius:999px; font-weight:600; font-size:15px;
    text-decoration:none; transition:all .15s;
    border:1.5px solid transparent;
  }
  .btn-primary{background:var(--brand); color:#fff;}
  .btn-primary:hover{background:#b32d00;}
  .btn-ghost{border-color:var(--ink); color:var(--ink);}
  .btn-ghost:hover{background:var(--ink); color:#fff;}

  /* ---------- intro ---------- */
  .intro{padding:88px 0 40px;}
  .intro p{font-size:18px; max-width:760px; color:#333;}
  .intro p + p{margin-top:16px;}

  /* ---------- dates ---------- */
  .dates-strip{background:var(--steel); color:#fff;}
  .dates-strip .eyebrow{color:#9fd8c9;}
  .dates-grid{
    margin-top:30px; display:grid; grid-template-columns:repeat(3,1fr); gap:1px;
    background:rgba(255,255,255,.14); border-radius:var(--radius); overflow:hidden;
  }
  .date-card{background:#1e3540; padding:28px 26px;}
  .date-card .d{font-family:"Fraunces",serif; font-size:26px; font-weight:600;}
  .date-card .l{margin-top:8px; font-size:13.5px; color:#b9c8cd;}
  @media (max-width:720px){ .dates-grid{grid-template-columns:1fr;} }

  /* ---------- section heading pattern ---------- */
  .sec-head{display:flex; align-items:baseline; justify-content:space-between; gap:24px; flex-wrap:wrap; margin-bottom:40px;}
  .sec-head h2{font-size:clamp(26px,3.2vw,36px);}
  .sec-head .eyebrow{display:block; margin-bottom:10px;}

  /* ---------- CFP ---------- */
  .cfp-grid{display:grid; grid-template-columns:1.1fr 1fr; gap:56px;}
  @media (max-width:860px){ .cfp-grid{grid-template-columns:1fr;} }
  .paper-type{
    background:var(--paper-raised); border:1px solid var(--line); border-radius:var(--radius);
    padding:22px 24px; margin-bottom:14px;
  }
  .paper-type h3{font-size:17px; font-family:"Inter"; font-weight:700;}
  .paper-type p{margin:6px 0 0; color:var(--muted); font-size:14.5px;}
  .fmt-note{
    margin-top:22px; padding:18px 20px; background:var(--brand-tint); border-radius:var(--radius);
    font-size:14.5px; color:#5a3223;
  }
  .fmt-note a{color:var(--brand); font-weight:600;}

  /* ---------- topics ---------- */
  .topics-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:28px;}
  @media (max-width:960px){ .topics-grid{grid-template-columns:repeat(2,1fr);} }
  @media (max-width:560px){ .topics-grid{grid-template-columns:1fr;} }
  .topic-col h3{
    font-family:"IBM Plex Mono", monospace; font-size:13px; font-weight:600; letter-spacing:.03em;
    color:var(--brand); text-transform:uppercase; margin-bottom:16px; padding-bottom:14px; border-bottom:2px solid var(--ink);
  }
  .topic-col ul{margin:0; padding:0; list-style:none;}
  .topic-col li{
    font-size:14.5px; color:#333; padding:9px 0; border-bottom:1px solid var(--line);
  }
  .topic-col li:last-child{border-bottom:none;}

  /* ---------- publication ---------- */
  .pub-strip{background:var(--paper-raised); border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
  .pub-inner{display:flex; align-items:center; gap:40px; flex-wrap:wrap;}
  .pub-inner img{height:52px; width:auto; opacity:.92;}
  .pub-inner p{margin:0; max-width:560px; font-size:15px; color:#333;}

  /* ---------- committee ---------- */
  .committee-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:24px;}
  @media (max-width:720px){ .committee-grid{grid-template-columns:1fr;} }
  .person{
    background:var(--paper-raised); border:1px solid var(--line); border-radius:var(--radius); padding:26px;
  }
  .person .role{font-family:"IBM Plex Mono",monospace; font-size:12px; text-transform:uppercase; letter-spacing:.08em; color:var(--brand);}
  .person h3{margin-top:10px; font-size:20px; font-weight:600;}
  .person .aff{margin-top:4px; color:var(--muted); font-size:14.5px;}

  /* ---------- venue ---------- */
  .venue-grid{display:grid; grid-template-columns:1fr 1fr; gap:20px;}
  @media (max-width:860px){ .venue-grid{grid-template-columns:1fr;} }
  .venue-photo{border-radius:var(--radius); overflow:hidden; aspect-ratio:4/3;}
  .venue-photo img{width:100%; height:100%; object-fit:cover; display:block;}
  .venue-text h3{font-size:24px;}
  .venue-text p{color:#333; margin-top:14px;}
  .venue-addr{
    margin-top:20px; font-family:"IBM Plex Mono",monospace; font-size:13.5px; color:var(--steel);
    line-height:1.8;
  }

  /* ---------- registration placeholder ---------- */
  .reg-box{
    background:var(--steel); color:#fff; border-radius:var(--radius);
    padding:48px; text-align:center;
  }
  .reg-box h2{color:#fff;}
  .reg-box p{color:#c9d6d9; max-width:520px; margin:14px auto 0;}

  /* ---------- final cta ---------- */
  .final-cta{text-align:center;}
  .final-cta h2{font-size:clamp(28px,4vw,42px); max-width:640px; margin:0 auto;}
  .final-cta p{margin-top:16px; color:var(--muted); font-size:16.5px;}
  .final-cta .hero-ctas{justify-content:center; margin-top:30px;}

  /* ---------- footer ---------- */
  footer{border-top:1px solid var(--line); padding:44px 0;}
  .foot-inner{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:16px;}
  .foot-inner .brand-lockup{font-size:16px;}
  footer .fine{font-size:13px; color:var(--muted);}