:root{
    --ink:#152029;
    --deep:#0B3242;      /* azul atlântico profundo */
    --deep-2:#0E404F;
    --sea:#2E6E86;       /* azul azulejo (frio, links) */
    --ochre:#BF832A;     /* ocre baiano (quente, raro) */
    --paper:#F7F6F2;     /* off-white neutro */
    --paper-2:#EFEDE6;
    --line:#D9D5CB;
    --white:#FFFFFF;
    --measure:68ch;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  @media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
  body{
    font-family:"Spectral",Georgia,serif;
    color:var(--ink);
    background:var(--paper);
    line-height:1.6;
    font-size:18px;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3{font-family:"Fraunces",Georgia,serif;font-weight:500;line-height:1.08;letter-spacing:-.01em}
  .mono{font-family:"IBM Plex Mono",ui-monospace,monospace}
  a{color:var(--sea);text-decoration:none}
  a:hover{text-decoration:underline;text-underline-offset:3px}

  /* ---- NAV ---- */
  nav{
    position:sticky;top:0;z-index:50;
    background:rgba(11,50,66,.94);
    backdrop-filter:blur(8px);
    border-bottom:1px solid rgba(255,255,255,.12);
  }
  .nav-in{max-width:1120px;margin:0 auto;padding:.7rem 1.5rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}
  .brand{color:#fff;font-family:"IBM Plex Mono",monospace;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;font-weight:500;white-space:nowrap}
  .brand b{color:var(--ochre);font-weight:500}
  .nav-links{display:flex;gap:1.4rem;flex-wrap:wrap}
  .nav-links a{color:rgba(255,255,255,.82);font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase}
  .nav-links a:hover{color:var(--ochre);text-decoration:none}
  @media(max-width:760px){.nav-links{display:none}}

  /* ---- HERO ---- */
  header.hero{
    position:relative;
    min-height:min(88vh,760px);
    display:flex;flex-direction:column;justify-content:flex-end;
    color:#fff;
    background:
      linear-gradient(180deg,rgba(9,38,50,.28) 0%,rgba(9,38,50,.55) 55%,rgba(9,38,50,.92) 100%),
      url("img/salvador.jpg");
    background-size:cover;
    background-position:center 35%;
  }
  .hero-in{max-width:1120px;margin:0 auto;width:100%;padding:2.5rem 1.5rem 3rem}
  .eyebrow{font-family:"IBM Plex Mono",monospace;font-size:.75rem;letter-spacing:.22em;text-transform:uppercase;color:var(--ochre);margin-bottom:1.1rem;display:flex;gap:.9rem;align-items:center;flex-wrap:wrap}
  .eyebrow .dot{width:5px;height:5px;background:var(--ochre);border-radius:50%;display:inline-block}
  header.hero h1{font-size:clamp(2.3rem,6vw,4.6rem);font-weight:600;max-width:15ch;text-shadow:0 2px 30px rgba(0,0,0,.3)}
  header.hero h1 em{font-style:italic;color:#F0E4C8}
  .hero-meta{margin-top:1.6rem;display:flex;gap:2.4rem;flex-wrap:wrap;font-family:"IBM Plex Mono",monospace;font-size:.9rem;letter-spacing:.02em}
  .hero-meta .k{display:block;font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,.6);margin-bottom:.35rem}
  .hero-meta .v{color:#fff;font-size:1.02rem}
  .credit{position:absolute;bottom:.5rem;right:.9rem;font-family:"IBM Plex Mono",monospace;font-size:.6rem;letter-spacing:.06em;color:rgba(255,255,255,.5)}

  /* ---- HILBERT SIGNATURE ---- */
  .hilbert{background:var(--deep);color:#fff;overflow:hidden}
  .hilbert-in{max-width:1120px;margin:0 auto;padding:2.2rem 1.5rem;display:flex;align-items:center;gap:2.5rem;flex-wrap:wrap}
  .bars{display:flex;align-items:flex-end;gap:7px;height:88px}
  .bars span{width:26px;background:linear-gradient(180deg,var(--ochre),#8f611c);border-radius:2px 2px 0 0;position:relative;opacity:.92}
  .bars span::after{content:attr(data-v);position:absolute;top:-1.35rem;left:0;right:0;text-align:center;font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:rgba(255,255,255,.7)}
  .hilbert p{font-family:"IBM Plex Mono",monospace;font-size:.82rem;line-height:1.7;color:rgba(255,255,255,.78);max-width:46ch}
  .hilbert p b{color:#F0E4C8;font-weight:500}

  /* ---- SECTIONS ---- */
  section{max-width:1120px;margin:0 auto;padding:4.5rem 1.5rem}
  .sec-head{display:flex;align-items:baseline;gap:0;margin-bottom:2rem;border-bottom:1px solid var(--line);padding-bottom:1rem}
  .sec-num{font-family:"IBM Plex Mono",monospace;font-size:.8rem;color:var(--ochre);letter-spacing:.1em}
  .sec-head h2{font-size:clamp(1.7rem,3.5vw,2.5rem);color:var(--deep)}
  .prose{max-width:var(--measure);font-size:1.08rem}
  .prose p{margin-bottom:1.1rem}
  .prose a{border-bottom:1px solid rgba(46,110,134,.35)}
  .lead{font-size:1.3rem;line-height:1.5;color:var(--deep-2);font-weight:400;margin-bottom:1.6rem}

  /* ---- SPEAKERS ---- */
  .grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:2px;background:var(--line);border:1px solid var(--line)}
  .card{background:var(--white);padding:1.4rem 1.3rem;transition:background .25s,transform .25s}
  .card:hover{background:var(--paper-2);transform:translateY(-2px)}
  .card .idx{font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:var(--ochre);letter-spacing:.06em}
  .card .name{font-family:"Fraunces",serif;font-size:1.18rem;color:var(--deep);margin-top:.5rem;font-weight:500}
  .note{margin-top:1.4rem;font-size:.92rem;color:#5a5f5c;font-style:italic}

  /* ---- COMMITTEE / INFO CARDS ---- */
  .cols{display:grid;grid-template-columns:1fr 1fr;gap:2px;background:var(--line);border:1px solid var(--line)}
  @media(max-width:680px){.cols{grid-template-columns:1fr}}
  .panel{background:var(--white);padding:1.8rem}
  .panel h3{font-size:1.15rem;color:var(--deep);margin-bottom:1rem;font-weight:600}
  .panel ul{list-style:none}
  .panel li{padding:.35rem 0;border-bottom:1px dotted var(--line);font-size:1rem}
  .panel li:last-child{border-bottom:none}

  /* ---- CALLOUT ---- */
  .callout{background:var(--deep);color:#fff;border-radius:4px;padding:2rem 2.2rem;margin-top:1.5rem}
  .callout h3{color:#F0E4C8;font-size:1.2rem;margin-bottom:.7rem}
  .callout p{color:rgba(255,255,255,.85);font-size:1rem;max-width:60ch}
  .btn{display:inline-block;margin-top:1.2rem;background:var(--ochre);color:#1a1206;font-family:"IBM Plex Mono",monospace;font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;padding:.8rem 1.4rem;border-radius:3px;font-weight:500}
  .btn:hover{background:#d8983a;text-decoration:none}

  /* ---- EDITIONS ---- */
  .editions{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}
  .ed{background:var(--white);border:1px solid var(--line);border-left:3px solid var(--sea);padding:1.3rem}
  .ed.current{border-left-color:var(--ochre);background:var(--paper-2)}
  .ed .roman{font-family:"Fraunces",serif;font-size:1.6rem;color:var(--deep);font-weight:600}
  .ed .place{font-size:.95rem;color:#555;margin-top:.3rem}
  .ed .yr{font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--ochre);letter-spacing:.08em;margin-top:.6rem;display:block}
  .ed.current .yr{color:var(--ochre)}

  /* ---- FOOTER ---- */
  footer{background:var(--deep);color:rgba(255,255,255,.8);margin-top:2rem}
  .foot-in{max-width:1120px;margin:0 auto;padding:3rem 1.5rem;display:flex;justify-content:space-between;gap:2rem;flex-wrap:wrap}
  footer .brand2{font-family:"Fraunces",serif;font-size:1.3rem;color:#fff;margin-bottom:.6rem}
  footer p{font-size:.9rem;line-height:1.7;max-width:40ch}
  footer .mono{font-size:.75rem;color:rgba(255,255,255,.55);letter-spacing:.06em}

/* ---- Páginas internas ---- */
header.page-hero{position:relative;min-height:300px;display:flex;flex-direction:column;justify-content:flex-end;color:#fff;
  background:linear-gradient(180deg,rgba(9,38,50,.35) 0%,rgba(9,38,50,.65) 55%,rgba(9,38,50,.94) 100%),url("img/salvador.jpg");
  background-size:cover;background-position:center 40%;}
header.page-hero h1{font-size:clamp(1.9rem,4.5vw,3.2rem);font-weight:600;max-width:20ch;text-shadow:0 2px 24px rgba(0,0,0,.3)}
.talks{max-width:var(--measure);}
.talk{padding:1.1rem 0;border-bottom:1px solid var(--line)}
.talk:last-child{border-bottom:none}
.talk .speaker{font-family:"Fraunces",serif;font-size:1.2rem;color:var(--deep);font-weight:600}
.talk .aff{font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--ochre);letter-spacing:.06em;margin-left:.5rem}
.talk .title{font-size:1.02rem;color:#333;margin-top:.25rem;font-style:italic}
.talk .title.pending{color:#999;font-style:italic}
.slides-list{max-width:var(--measure)}
.slides-list a{display:block;padding:.6rem 0;border-bottom:1px dotted var(--line);font-size:1rem}
.slides-list a:hover{background:var(--paper-2);text-decoration:none;padding-left:.4rem;transition:padding .2s}
.back-link{font-family:"IBM Plex Mono",monospace;font-size:.75rem;letter-spacing:.08em;text-transform:uppercase}

/* ---- Fotos das edições anteriores ---- */
.page-hero.solid{background:linear-gradient(160deg,var(--deep) 0%,var(--deep-2) 100%);min-height:220px}
.edition-photo{max-width:1120px;margin:0 auto;padding:2.5rem 1.5rem 0}
.edition-photo img{width:100%;height:auto;display:block;border-radius:4px;box-shadow:0 8px 40px rgba(11,50,66,.18)}
.edition-photo figcaption{font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.08em;color:#888;margin-top:.7rem;text-transform:uppercase}

.card .card-aff{font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:#888;margin-top:.35rem;letter-spacing:.04em}

/* ---- Taxas de inscrição ---- */
.fees{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2px;background:var(--line);
      border:1px solid var(--line);max-width:78ch;margin-top:1.6rem}
.fee{background:var(--white);padding:1.2rem 1.3rem;display:flex;flex-direction:column;gap:.4rem}
.fee .cat{font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:#777}
.fee .val{font-family:"Fraunces",serif;font-size:1.7rem;font-weight:600;color:var(--deep)}

/* Marca longa quebra linha no celular em vez de estourar a largura */
@media(max-width:760px){
  .brand{white-space:normal;font-size:.66rem;line-height:1.45}
  .nav-in{padding:.6rem 1.1rem}
}

/* ---- Downloads (modelo LaTeX) ---- */
.downloads{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;max-width:78ch;margin-top:1.5rem}
.dl{display:flex;align-items:center;gap:1rem;background:var(--white);border:1px solid var(--line);
    border-left:3px solid var(--sea);padding:1rem 1.2rem;text-decoration:none;transition:border-color .2s,transform .2s}
.dl:hover{border-left-color:var(--ochre);transform:translateY(-2px);text-decoration:none}
.dl .ext{font-family:"IBM Plex Mono",monospace;font-size:.8rem;font-weight:500;color:var(--ochre);
         letter-spacing:.06em;flex:none;min-width:2.6rem}
.dl .lbl{font-family:"Fraunces",serif;font-size:1.05rem;color:var(--deep);display:flex;flex-direction:column}
.dl .sub{font-family:"Spectral",serif;font-size:.85rem;color:#777;margin-top:.15rem}

/* ---- Cartaz ---- */
.poster-card{display:flex;gap:1.5rem;align-items:center;background:var(--white);border:1px solid var(--line);
  border-left:3px solid var(--ochre);padding:1.2rem;max-width:78ch;margin-top:1.4rem;text-decoration:none;
  transition:transform .2s,box-shadow .2s}
.poster-card:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(11,50,66,.12);text-decoration:none}
.poster-card img{width:120px;height:auto;flex:none;border:1px solid var(--line)}
.poster-card .pc-txt{display:flex;flex-direction:column;gap:.3rem}
.poster-card .pc-txt b{font-family:"Fraunces",serif;font-size:1.15rem;color:var(--deep);font-weight:600}
.poster-card .pc-txt span{font-size:.95rem;color:#777}