@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@500;600;700;800&family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=Source+Serif+4:opsz,wght@8..60,400;8..60,500;8..60,600;8..60,700&family=Inter:wght@400;500;600;700&display=swap');

:root{
  --paper:#fdfcfa;
  --raised:#ffffff;
  --ink:#16181a;
  --ink-soft:#43474b;
  --subtext:#71757a;
  --rule:#e6e3dd;
  --rule-strong:#cdc8c0;
  --accent:#3f7e73;
  --accent-ink:#2c5850;
  --accent-wash:#eaf2f0;
  --shadow-s:0 1px 2px rgba(22,24,26,.04), 0 2px 8px rgba(22,24,26,.04);
  --shadow-m:0 2px 4px rgba(22,24,26,.05), 0 12px 28px rgba(22,24,26,.09);
  --ui:'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  --display:'Fraunces', 'Source Serif 4', Georgia, serif;
  --text:'Source Serif 4', Georgia, 'Times New Roman', serif;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:#121416;
    --raised:#191c1f;
    --ink:#f0eeea;
    --ink-soft:#c9c6c0;
    --subtext:#989692;
    --rule:#272b2e;
    --rule-strong:#3a3f43;
    --accent:#6fb3a4;
    --accent-ink:#8ecabc;
    --accent-wash:#18211f;
    --shadow-s:0 1px 2px rgba(0,0,0,.3), 0 2px 8px rgba(0,0,0,.25);
    --shadow-m:0 2px 6px rgba(0,0,0,.35), 0 14px 32px rgba(0,0,0,.45);
  }
}
:root[data-theme="dark"]{
  --paper:#121416;
  --raised:#191c1f;
  --ink:#f0eeea;
  --ink-soft:#c9c6c0;
  --subtext:#989692;
  --rule:#272b2e;
  --rule-strong:#3a3f43;
  --accent:#6fb3a4;
  --accent-ink:#8ecabc;
  --accent-wash:#18211f;
  --shadow-s:0 1px 2px rgba(0,0,0,.3), 0 2px 8px rgba(0,0,0,.25);
  --shadow-m:0 2px 6px rgba(0,0,0,.35), 0 14px 32px rgba(0,0,0,.45);
}

*{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--text);
  font-size:17px;
  line-height:1.72;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  font-variant-numeric:oldstyle-nums proportional-nums;
}
::selection{ background:var(--accent); color:#fff; }

a{ color:var(--accent-ink); text-decoration-thickness:1px; text-underline-offset:2px; }
a:hover{ color:var(--accent); }
a:focus-visible, button:focus-visible, .navlink:focus-visible{
  outline:2px solid var(--accent); outline-offset:3px; border-radius:2px;
}

h1,h2,h3{ font-family:var(--display); font-weight:600; text-wrap:balance; margin:0; color:var(--ink); }

.eyebrow{
  font-family:'Inter', sans-serif;
  font-size:0.78rem; letter-spacing:0.1em; text-transform:uppercase; font-weight:600;
  color:var(--accent-ink);
}

.wrap{ max-width:1180px; margin:0 auto; padding-inline:24px; }
section, main > .page{ padding-block:64px; }
@media (max-width:640px){ section, main > .page{ padding-block:40px; } }

hr.rule{ border:none; border-top:1px solid var(--rule); margin:0; }

/* ---------- Nav ---------- */
header.site-nav{
  position:sticky; top:0; z-index:50;
  background:var(--paper);
  border-bottom:1px solid var(--rule);
}
.nav-row{
  max-width:1180px; margin:0 auto; padding:16px 24px;
  display:flex; align-items:center; justify-content:space-between; gap:16px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-family:'Archivo', sans-serif; font-weight:800; font-size:1.05rem; color:var(--ink);
  text-decoration:none; white-space:nowrap; letter-spacing:0.01em;
}
.brand:hover{ color:var(--ink); }
.brand-mark{
  width:30px; height:30px; border-radius:50%; background:var(--accent-wash);
  color:var(--accent-ink); display:flex; align-items:center; justify-content:center;
  font-family:'Archivo', sans-serif; font-weight:800; font-size:0.78rem; flex:none;
}

nav.links{ display:flex; gap:4px; align-items:center; flex-wrap:wrap; }
.navlink{
  font-family:'Inter', sans-serif; font-size:0.88rem; font-weight:500;
  color:var(--ink-soft); text-decoration:none; white-space:nowrap;
  padding:7px 13px; border-radius:20px; transition:background .15s ease, color .15s ease;
}
.navlink:hover{ color:var(--ink); background:var(--rule); }
.navlink.active{ background:var(--ink); color:var(--paper); }
.navlink.active:hover{ background:var(--ink); color:var(--paper); }

.lang-switch{ display:flex; gap:2px; margin-left:6px; padding-left:14px; border-left:1px solid var(--rule); }
.lang-btn{
  display:flex; align-items:center; gap:5px;
  font-family:'Inter', sans-serif; font-weight:600; font-size:0.74rem; letter-spacing:0.03em;
  padding:6px 9px; border-radius:16px; border:1px solid transparent; background:none; color:var(--subtext); cursor:pointer;
}
.lang-btn:hover{ color:var(--ink); }
.lang-btn[aria-pressed="true"]{ background:var(--accent-wash); color:var(--accent-ink); }
.flag-icon{ width:16px; height:11.2px; border-radius:2px; display:block; flex:none; }

#nav-toggle{ display:none; }
.burger{
  display:none; width:36px; height:36px; border-radius:8px; border:1px solid var(--rule);
  background:var(--paper); align-items:center; justify-content:center; cursor:pointer; flex:none;
}
.burger span, .burger span::before, .burger span::after{
  content:""; display:block; width:16px; height:2px; background:var(--ink); position:relative;
  transition:transform .2s ease, opacity .2s ease;
}
.burger span::before{ position:absolute; top:-5px; }
.burger span::after{ position:absolute; top:5px; }

@media (max-width:820px){
  nav.links{
    position:absolute; top:100%; left:0; right:0;
    flex-direction:column; align-items:stretch; gap:2px;
    background:var(--paper); border-bottom:0 solid var(--rule);
    padding:0 24px; max-height:0; overflow:hidden;
  }
  nav.links .navlink{ padding:10px 12px; width:100%; border-radius:8px; }
  nav.links .navlink.active{ border-radius:8px; }
  .lang-switch{ margin-left:0; padding-left:0; border-left:none; padding-top:10px; border-top:1px solid var(--rule); margin-top:6px; }
  .burger{ display:flex; }
  #nav-toggle:checked ~ .nav-row nav.links{ max-height:480px; padding-block:8px 16px; border-bottom-width:1px; }
  #nav-toggle:checked ~ .nav-row .burger span{ background:transparent; }
  #nav-toggle:checked ~ .nav-row .burger span::before{ transform:translateY(5px) rotate(45deg); }
  #nav-toggle:checked ~ .nav-row .burger span::after{ transform:translateY(-5px) rotate(-45deg); }
}

/* ---------- Home (tarjeta estilo académico clásico) ---------- */
.home-hero{ padding-block:64px 56px; }
.home-grid{ display:grid; grid-template-columns:1fr 380px; gap:64px; align-items:start; }
.home-info h1{
  font-size:clamp(2.1rem, 4.4vw, 3rem); line-height:1.05; margin-top:2px; text-transform:uppercase; letter-spacing:0.01em;
}
.home-info .eyebrow{ display:block; margin-bottom:2px; }
.home-affil{ margin-top:18px; color:var(--ink-soft); font-size:0.98rem; line-height:1.55; }
.home-links{ margin-top:18px; display:flex; flex-direction:column; gap:7px; }
.home-links a{ font-size:0.96rem; }
.home-links .row{ display:flex; gap:8px; font-size:0.96rem; color:var(--ink-soft); }
.home-links .row dt{ font-weight:600; color:var(--ink); }
.home-quote{
  margin-top:26px; padding-left:16px; border-left:2px solid var(--accent);
  color:var(--subtext); font-style:italic; font-size:0.92rem; max-width:48ch;
}
.home-quote cite{ display:block; margin-top:6px; font-style:normal; font-size:0.76rem; letter-spacing:0.03em; color:var(--subtext); }

.home-photo{ position:relative; width:380px; height:380px; }
.home-photo .halo{
  position:absolute; inset:0; border-radius:50%; background:var(--accent-wash);
  transform:translate(22px,22px);
}
.home-avatar{ position:relative; width:100%; height:100%; border-radius:50%; object-fit:cover; display:block; }

@media (max-width:900px){
  .home-grid{ grid-template-columns:1fr; gap:36px; }
  .home-photo{ order:-1; width:260px; height:260px; margin:0 auto; }
}

.home-intro{ margin-top:56px; }

/* ---------- Page header (páginas internas) ---------- */
.page-head{ text-align:center; padding-block:56px 40px; border-bottom:1px solid var(--rule); }
.page-head .eyebrow{ display:block; }
.page-head h1{
  margin-top:10px; font-size:clamp(1.7rem, 4vw, 2.5rem); text-transform:uppercase; letter-spacing:0.01em;
}
.page-head .rule-accent{
  width:110px; height:3px; background:var(--accent); margin:20px auto 0; border-radius:2px;
}
.page-head p.lead{
  max-width:70ch; margin:22px auto 0; color:var(--ink-soft); font-size:1.02rem;
}

/* ---------- Section headings dentro de una página ---------- */
h2.section-title{
  font-family:'Source Serif 4', Georgia, serif; font-weight:600; text-transform:uppercase;
  letter-spacing:0.04em; text-align:center; font-size:1.5rem; color:var(--ink);
  padding-bottom:20px; border-bottom:1px solid var(--rule); margin-bottom:34px;
}
.page > .wrap > .block + .block{ margin-top:52px; }
h3.sub-title{
  font-family:'Source Serif 4', Georgia, serif; font-weight:600; font-size:1.12rem; color:var(--ink);
  margin-bottom:14px;
}

p{ color:var(--ink-soft); }
.body-text p + p{ margin-top:14px; }
.body-text{ max-width:78ch; }
.body-text.center{ margin-inline:auto; text-align:center; }

/* ---------- Botones ---------- */
.btn{
  font-family:'Inter', sans-serif; font-size:0.86rem; font-weight:600;
  text-decoration:none; padding:11px 20px; border-radius:4px;
  display:inline-flex; align-items:center; gap:8px; border:1px solid transparent; cursor:pointer;
}
.btn-solid{ background:var(--accent); color:#fff; }
.btn-solid:hover{ background:var(--accent-ink); color:#fff; }
.btn-outline{ border-color:var(--rule-strong); color:var(--ink); }
.btn-outline:hover{ border-color:var(--accent); color:var(--accent-ink); }
.btn-row{ display:flex; gap:12px; flex-wrap:wrap; }

/* ---------- Listas de definición (áreas, contacto) ---------- */
.def-list{ display:flex; flex-direction:column; gap:22px; }
.def-row{ display:grid; grid-template-columns:180px 1fr; gap:18px; }
@media (max-width:640px){ .def-row{ grid-template-columns:1fr; gap:4px; } }
.def-row dt{ font-weight:600; color:var(--ink); }
.def-row dd{ margin:0; color:var(--ink-soft); }

/* ---------- Timeline (educación, premios) ---------- */
.timeline{ display:flex; flex-direction:column; gap:20px; }
.tl-item{ display:grid; grid-template-columns:120px 1fr; gap:18px; }
@media (max-width:640px){ .tl-item{ grid-template-columns:1fr; gap:2px; } }
.tl-item .period{ font-weight:600; color:var(--accent-ink); font-size:0.92rem; }
.tl-item .what{ font-weight:600; color:var(--ink); }
.tl-item .where{ color:var(--subtext); font-size:0.92rem; margin-top:1px; }
.tl-item .desc{ color:var(--ink-soft); margin-top:4px; font-size:0.94rem; }

.chip-row{ display:flex; flex-wrap:wrap; gap:8px; }
.chip{
  font-size:0.82rem; padding:6px 12px; border-radius:16px; border:1px solid var(--rule);
  color:var(--ink-soft);
}

/* ---------- Cursos ---------- */
.course-grid{ display:grid; grid-template-columns:repeat(3, 1fr); gap:36px; }
@media (max-width:900px){ .course-grid{ grid-template-columns:1fr; } }
.course-card{ display:flex; flex-direction:column; gap:16px; }
.course-card .inst{ font-family:'Archivo', sans-serif; font-weight:700; font-size:1.02rem; color:var(--ink); }
.course-card .place{ color:var(--subtext); font-size:0.86rem; font-style:italic; }
.period-badge{
  display:inline-block; font-size:0.74rem; font-weight:600; color:var(--accent-ink);
  background:var(--accent-wash); padding:4px 10px; border-radius:12px; width:fit-content;
}
.course-list{ display:flex; flex-direction:column; gap:14px; }
.course-row{
  --tono:var(--accent);
  --tono-ink:var(--tono);
  --tono-wash:color-mix(in srgb, var(--tono) 7%, var(--paper));
  --tono-rule:color-mix(in srgb, var(--tono) 26%, var(--rule));
  padding:14px 16px 15px;
  border:1px solid var(--tono-rule);
  border-left:3px solid var(--tono-ink);
  border-radius:10px;
  background:var(--tono-wash);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]) .course-row{
    --tono-ink:color-mix(in srgb, var(--tono) 55%, #ffffff);
    --tono-wash:color-mix(in srgb, var(--tono) 12%, var(--paper));
    --tono-rule:color-mix(in srgb, var(--tono) 34%, var(--rule));
  }
}
:root[data-theme="dark"] .course-row{
  --tono-ink:color-mix(in srgb, var(--tono) 55%, #ffffff);
  --tono-wash:color-mix(in srgb, var(--tono) 12%, var(--paper));
  --tono-rule:color-mix(in srgb, var(--tono) 34%, var(--rule));
}
.cname{ font-weight:700; color:var(--tono-ink); font-size:0.95rem; letter-spacing:-0.01em; }

/* grupos de PDF dentro de cada materia */
.notes-group{ margin-top:11px; }
.ng-title{
  display:block; font-size:0.68rem; font-weight:700; text-transform:uppercase;
  letter-spacing:0.08em; color:var(--tono-ink); opacity:0.85;
}
.notes-group .notes-links{ margin-top:5px; }
.cwhen{ color:var(--subtext); font-size:0.82rem; margin-top:2px; }
.cnote{ color:var(--subtext); font-size:0.82rem; margin-top:2px; }
.notes-badge{
  display:inline-flex; align-items:center; gap:5px; margin-top:6px; font-size:0.78rem; color:var(--subtext);
}
.notes-badge svg{ width:13px; height:13px; }
.notes-links{ display:flex; flex-wrap:wrap; gap:7px; margin-top:8px; }
.notes-links a{
  display:inline-flex; align-items:center; gap:5px; font-size:0.76rem; font-weight:500;
  color:var(--ink-soft); border:1px solid var(--rule); border-radius:12px; padding:4px 10px; text-decoration:none;
  background:var(--paper);
}
.notes-links a:hover{ border-color:var(--accent); color:var(--accent-ink); }
.course-row .notes-links a{ border-color:var(--tono-rule); }
.course-row .notes-links a:hover{
  border-color:var(--tono-ink); color:var(--tono-ink);
  background:color-mix(in srgb, var(--tono) 10%, var(--paper));
}
.notes-links svg{ width:12px; height:12px; }

/* ---------- Investigación ---------- */
.biblio{ margin:0; padding-left:22px; color:var(--ink-soft); }
.biblio li + li{ margin-top:10px; }
.problem-grid{ display:flex; flex-direction:column; gap:10px; }
.prow{ padding-block:9px; border-top:1px solid var(--rule); font-size:0.92rem; color:var(--ink-soft); }
.prow:first-child{ border-top:none; }
.prow span:first-child{ font-weight:600; color:var(--ink); }
.talks{ display:flex; flex-direction:column; gap:16px; }
.talk{ display:grid; grid-template-columns:70px 1fr; gap:18px; }
@media (max-width:640px){ .talk{ grid-template-columns:1fr; gap:2px; } }
.talk .year{ font-weight:600; color:var(--accent-ink); }
.talk .title{ font-weight:600; color:var(--ink); font-size:0.94rem; }
.talk .venue{ color:var(--subtext); font-size:0.88rem; margin-top:1px; }

/* ---------- Solving Problems ---------- */
.sp-stats{ display:flex; gap:40px; justify-content:center; flex-wrap:wrap; }
.sp-stat{ text-align:center; }
.sp-stat-amount{ font-family:'Archivo', sans-serif; font-weight:800; font-size:1.9rem; color:var(--accent-ink); }
.sp-stat-label{ color:var(--subtext); font-size:0.86rem; margin-top:4px; }
.sp-judges{ text-align:center; max-width:70ch; margin:0 auto; }
.sp-judges-label{ font-weight:600; color:var(--ink); margin-bottom:6px; }
.sp-judges-list{ color:var(--ink-soft); font-size:0.94rem; }
.sp-personal{ font-style:italic; }
.sp-archive-label{ font-weight:600; color:var(--ink); margin-bottom:6px; text-align:center; }
.sp-archive-intro{ max-width:68ch; margin:0 auto 26px; color:var(--ink-soft); font-size:0.94rem; text-align:center; }
.sp-poster-grid{ display:grid; grid-template-columns:repeat(2, 1fr); gap:28px; }
@media (max-width:820px){ .sp-poster-grid{ grid-template-columns:1fr; } }
.sp-poster-card{ border:1px solid var(--rule); border-radius:6px; padding:22px 24px; display:flex; flex-direction:column; gap:10px; }
.sp-poster-thumb{ display:block; position:relative; height:180px; margin:-22px -24px 4px; overflow:hidden; border-radius:6px 6px 0 0; background:var(--paper); }
.sp-poster-thumb img{ width:100%; height:100%; object-fit:cover; object-position:top center; display:block; transition:transform 0.3s ease; }
.sp-poster-thumb:hover img{ transform:scale(1.04); }
.sp-poster-thumb-caption{
  position:absolute; left:0; right:0; bottom:0; padding:8px 12px 7px;
  font-size:0.74rem; font-weight:600; color:#fff;
  background:linear-gradient(to top, rgba(0,0,0,0.68), rgba(0,0,0,0));
}
.sp-poster-date{ display:inline-block; font-size:0.74rem; font-weight:600; color:var(--accent-ink); letter-spacing:0.02em; }
.sp-poster-title{ font-family:'Archivo', sans-serif; font-weight:700; font-size:1.04rem; color:var(--ink); }
.sp-poster-problems{ margin:0; padding-left:18px; color:var(--ink-soft); font-size:0.88rem; line-height:1.55; }
.sp-poster-problems li + li{ margin-top:5px; }
.sp-poster-link{ align-self:flex-start; margin-top:4px; font-size:0.86rem; padding:7px 14px; display:inline-flex; align-items:center; gap:6px; }
.sp-poster-link svg{ width:14px; height:14px; }
.center-block{ text-align:center; }

/* ---------- Blog ---------- */
.blog-note{ text-align:center; max-width:64ch; margin:0 auto; color:var(--ink-soft); }
.post-grid{ display:grid; grid-template-columns:repeat(3, 1fr); gap:32px; }
@media (max-width:900px){ .post-grid{ grid-template-columns:1fr; } }
.post-card{ border-top:3px solid var(--accent); padding-top:18px; }
.ptag{
  font-size:0.72rem; font-weight:600; letter-spacing:0.06em; text-transform:uppercase; color:var(--accent-ink);
}
.post-card time{ display:block; color:var(--subtext); font-size:0.8rem; margin-top:4px; }
.post-card h3{ font-family:'Archivo', sans-serif; font-size:1.08rem; margin-top:10px; }
.post-card p{ margin-top:10px; font-size:0.92rem; }

/* ---------- CV ---------- */
.cv-grid{ display:grid; grid-template-columns:repeat(2, 1fr); gap:32px; max-width:760px; margin:0 auto; }
@media (max-width:640px){ .cv-grid{ grid-template-columns:1fr; } }
.cv-card{ border:1px solid var(--rule); border-radius:6px; padding:26px; text-align:center; }
.cv-thumb{ display:block; position:relative; height:190px; margin:-26px -26px 16px; overflow:hidden; border-radius:6px 6px 0 0; background:var(--paper); }
.cv-thumb img{ width:100%; height:100%; object-fit:cover; object-position:top center; display:block; transition:transform 0.3s ease; }
.cv-thumb:hover img{ transform:scale(1.04); }
.cv-thumb-caption{
  position:absolute; left:0; right:0; bottom:0; padding:8px 12px 7px;
  font-size:0.74rem; font-weight:600; color:#fff;
  background:linear-gradient(to top, rgba(0,0,0,0.68), rgba(0,0,0,0));
}
.cv-card-top{ display:flex; align-items:center; justify-content:center; gap:10px; }
.cv-badge{ font-size:0.76rem; font-weight:600; color:var(--subtext); letter-spacing:0.02em; }
.cv-title{ font-family:'Archivo', sans-serif; font-weight:700; font-size:1.1rem; margin-top:12px; }
.cv-meta{ font-size:0.84rem; margin-top:4px; }
.cv-actions{ margin-top:18px; display:flex; gap:10px; justify-content:center; flex-wrap:wrap; }

/* ---------- Contacto ---------- */
.contact-grid{ margin:0; display:flex; flex-direction:column; gap:16px; max-width:60ch; margin-inline:auto; text-align:center; }
.contact-grid div{ display:flex; gap:10px; justify-content:center; font-size:0.98rem; }
.contact-grid dt{ font-weight:600; color:var(--ink); min-width:120px; text-align:right; }
.contact-grid dd{ margin:0; color:var(--ink-soft); text-align:left; }
@media (max-width:520px){
  .contact-grid div{ flex-direction:column; text-align:center; }
  .contact-grid dt{ text-align:center; min-width:0; }
  .contact-grid dd{ text-align:center; }
}

/* ---------- Footer ---------- */
footer.site-foot{ border-top:1px solid var(--rule); padding-block:40px; margin-top:20px; }
.foot-bottom{
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:8px;
  font-size:0.82rem; color:var(--subtext); max-width:1180px; margin:0 auto; padding-inline:24px;
}

/* ---------- Utilidades ---------- */
.formula{ font-family:'Source Serif 4', Georgia, serif; font-style:italic; color:var(--ink-soft); }
.formula-display{ display:block; margin-top:10px; font-size:1.05rem; }
.formula-cap{ display:block; font-size:0.78rem; color:var(--subtext); margin-top:4px; }

.reveal{ opacity:1; }

/* ===== Visor de PDF (solo lectura, sin descarga) ===== */
.pdfv-overlay{position:fixed;inset:0;z-index:9999;display:none;background:rgba(17,20,28,.82);
  -webkit-backdrop-filter:saturate(120%) blur(2px);backdrop-filter:saturate(120%) blur(2px)}
.pdfv-overlay.open{display:flex;align-items:center;justify-content:center;padding:24px}
.pdfv-panel{background:#fff;border-radius:12px;box-shadow:0 24px 60px rgba(0,0,0,.35);
  width:min(1040px,100%);height:min(94vh,100%);display:flex;flex-direction:column;overflow:hidden}
.pdfv-bar{display:flex;align-items:center;gap:12px;padding:10px 14px;border-bottom:1px solid #e6e8ef;
  background:#fbfbfd;flex-wrap:wrap}
.pdfv-title{font-weight:700;font-size:.95rem;color:#1f2430;flex:1 1 220px;min-width:0;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pdfv-tools{display:flex;align-items:center;gap:6px}
.pdfv-btn{appearance:none;border:1px solid #d9dce6;background:#fff;color:#2b3040;border-radius:7px;
  min-width:32px;height:32px;padding:0 9px;font:inherit;font-size:.9rem;line-height:1;cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;transition:background .15s,border-color .15s}
.pdfv-btn:hover:not(:disabled){background:#f1f3f8;border-color:#c3c8d6}
.pdfv-btn:disabled{opacity:.4;cursor:default}
.pdfv-btn.pdfv-close{border-color:transparent;font-size:1.15rem;color:#555}
.pdfv-count{font-size:.85rem;color:#555;min-width:92px;text-align:center;font-variant-numeric:tabular-nums}
.pdfv-stage{flex:1;overflow:auto;background:#eef0f5;padding:18px;display:flex;justify-content:center;
  align-items:flex-start;-webkit-user-select:none;user-select:none}
.pdfv-stage canvas{background:#fff;box-shadow:0 2px 14px rgba(0,0,0,.18);max-width:100%;height:auto;
  pointer-events:none;-webkit-user-drag:none;user-drag:none}
.pdfv-msg{margin:auto;color:#4a4f5c;font-size:.95rem;text-align:center;line-height:1.6;padding:24px}
.pdfv-foot{padding:7px 14px;border-top:1px solid #e6e8ef;background:#fbfbfd;font-size:.78rem;color:#7a8091;
  text-align:center}
body.pdfv-lock{overflow:hidden}
@media (max-width:640px){
  .pdfv-overlay.open{padding:0}
  .pdfv-panel{height:100%;width:100%;border-radius:0}
  .pdfv-title{flex-basis:100%;font-size:.88rem}
  .pdfv-stage{padding:10px}
}

/* ============================================================
   CAPA EDITORIAL
   Tipografía de revista científica, jerarquía más clara,
   movimiento discreto al desplazar. Añadida en noviembre de 2026.
   ============================================================ */

/* --- El cuerpo es serif; la interfaz sigue siendo sans --- */
.navlink, .brand, .brand-mark, .lang-btn, .eyebrow, .btn, .chip,
.notes-links a, .ng-title, .cname, .period-badge, .notes-badge,
.foot-bottom, .ptag, .cv-badge, .sp-stat-label, .sp-stat-amount,
.sp-poster-date, .post-card time, .tl-item .period, .talk .year,
.pdfv-bar, .pdfv-btn, .pdfv-count, .pdfv-foot, .pdfv-title{
  font-family:var(--ui);
  font-variant-numeric:normal;
}

/* --- Titulares --- */
h1{ letter-spacing:-0.018em; }
h2, h3{ letter-spacing:-0.01em; }

.eyebrow{
  font-size:0.72rem; letter-spacing:0.14em; font-weight:600;
  color:var(--accent-ink);
}

h2.section-title{
  font-family:var(--display);
  font-weight:600; font-size:clamp(1.35rem, 2.4vw, 1.75rem);
  text-transform:none; letter-spacing:-0.012em;
  border-bottom:none; padding-bottom:0; margin-bottom:34px;
  position:relative; padding-top:26px;
}
h2.section-title::before{
  content:""; position:absolute; top:0; left:50%; transform:translateX(-50%);
  width:38px; height:2px; border-radius:2px; background:var(--accent);
}
h3.sub-title{ font-family:var(--display); font-weight:600; font-size:1.16rem; }

/* --- Barra de navegación --- */
header.site-nav{
  background:color-mix(in srgb, var(--paper) 82%, transparent);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  backdrop-filter:saturate(180%) blur(12px);
}
.navlink{ transition:background .18s ease, color .18s ease; }
.navlink.active{ background:var(--accent-ink); color:#fff; }
.navlink.active:hover{ background:var(--accent-ink); color:#fff; }
.brand-mark{
  background:var(--accent-ink); color:#fff;
  box-shadow:0 0 0 3px var(--accent-wash);
}

/* --- Portada --- */
.home-hero{ padding-block:84px 68px; }
.home-info h1{
  font-size:clamp(2.5rem, 6vw, 4.1rem);
  line-height:1.0; text-transform:none; letter-spacing:-0.025em;
  font-weight:600; margin-top:10px;
}
.home-affil{
  font-family:var(--text); font-size:1.02rem; margin-top:22px;
  padding-left:16px; border-left:1px solid var(--rule-strong);
}
.home-links{ margin-top:24px; gap:0; }
.home-links .row{
  display:grid; grid-template-columns:150px 1fr; gap:14px;
  padding-block:9px; border-top:1px solid var(--rule); align-items:baseline;
}
.home-links .row:first-child{ border-top:none; }
.home-links .row dt{
  font-family:var(--ui); font-size:0.76rem; font-weight:600;
  letter-spacing:0.07em; text-transform:uppercase; color:var(--subtext);
}
.home-links .row dd{ margin:0; }
@media (max-width:520px){
  .home-links .row{ grid-template-columns:1fr; gap:1px; }
}
.home-quote{
  margin-top:34px; padding-left:0; border-left:none;
  font-family:var(--display); font-style:italic; font-size:1.18rem;
  line-height:1.5; color:var(--ink-soft); position:relative; padding-top:14px;
}
.home-quote::before{
  content:"\201C"; position:absolute; top:-14px; left:-6px;
  font-family:var(--display); font-size:3.4rem; line-height:1;
  color:var(--accent); opacity:0.3;
}
.home-quote cite{ font-family:var(--ui); margin-top:10px; }

.home-photo{ width:360px; height:360px; }
.home-photo .halo{
  transform:none; inset:-10px;
  background:radial-gradient(circle at 32% 28%,
    color-mix(in srgb, var(--accent) 26%, transparent), transparent 68%);
}
.home-avatar{
  box-shadow:var(--shadow-m);
  outline:1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  outline-offset:10px;
  transition:transform .5s cubic-bezier(.2,.7,.3,1);
}
.home-photo:hover .home-avatar{ transform:scale(1.015); }
@media (max-width:900px){ .home-photo{ width:250px; height:250px; } }

/* --- Cabecera de las páginas internas --- */
.page-head{ padding-block:72px 48px; }
.page-head h1{
  font-size:clamp(2rem, 5vw, 3.1rem); text-transform:none;
  letter-spacing:-0.022em; font-weight:600; margin-top:14px;
}
.page-head .rule-accent{ width:54px; height:2px; margin-top:24px; }
.page-head p.lead{ font-size:1.08rem; max-width:62ch; }

/* --- Texto de lectura --- */
.body-text{ max-width:68ch; font-size:1.04rem; }
.body-text.center{ max-width:64ch; }
p{ color:var(--ink-soft); }

/* --- Enlaces: subrayado que crece --- */
.body-text a, .home-links a, .biblio a, .contact-grid a{
  text-decoration:none;
  background-image:linear-gradient(currentColor, currentColor);
  background-size:0% 1px; background-repeat:no-repeat;
  background-position:0 calc(100% - 1px);
  transition:background-size .28s cubic-bezier(.2,.7,.3,1), color .18s ease;
}
.body-text a:hover, .home-links a:hover, .biblio a:hover, .contact-grid a:hover{
  background-size:100% 1px;
}

/* --- Botones --- */
.btn{ border-radius:6px; transition:transform .18s ease, background .18s ease, border-color .18s ease, box-shadow .18s ease; }
.btn-solid{ box-shadow:var(--shadow-s); }
.btn:hover{ transform:translateY(-1px); }
.btn-solid:hover{ box-shadow:var(--shadow-m); }

/* --- Tarjetas con relieve --- */
.cv-card, .sp-poster-card{
  background:var(--raised); box-shadow:var(--shadow-s); border-radius:10px;
  transition:transform .25s cubic-bezier(.2,.7,.3,1), box-shadow .25s ease;
}
.cv-card:hover, .sp-poster-card:hover{ transform:translateY(-3px); box-shadow:var(--shadow-m); }
.cv-thumb, .sp-poster-thumb{ border-radius:10px 10px 0 0; }
.cv-title, .sp-poster-title, .post-card h3{ font-family:var(--display); font-weight:600; }

.course-row{ transition:transform .22s cubic-bezier(.2,.7,.3,1), box-shadow .22s ease; }
.course-row:hover{ transform:translateY(-2px); box-shadow:var(--shadow-s); }
.notes-links a{ transition:border-color .16s ease, color .16s ease, background .16s ease; }
.course-card .inst{ font-family:var(--display); font-weight:600; font-size:1.08rem; }

.post-card{ border-top-width:2px; }
.chip{ font-family:var(--ui); transition:border-color .16s ease, color .16s ease; }
.chip:hover{ border-color:var(--accent); color:var(--accent-ink); }

/* --- Aparición al desplazar --- */
.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .7s cubic-bezier(.2,.7,.3,1), transform .7s cubic-bezier(.2,.7,.3,1);
  will-change:opacity, transform;
}
.reveal.is-in{ opacity:1; transform:none; }
html.no-js .reveal, .no-reveal .reveal{ opacity:1; transform:none; }

@media (prefers-reduced-motion: reduce){
  .reveal, .reveal.is-in{ opacity:1 !important; transform:none !important; transition:none !important; }
  *{ animation-duration:.001ms !important; transition-duration:.001ms !important; }
}

/* --- Fórmulas --- */
.katex{ font-size:1.045em; }
.katex-display{
  margin:22px 0; padding:4px 0;
  overflow-x:auto; overflow-y:hidden;
}
.katex-display > .katex{ color:var(--ink); }

/* --- Pie --- */
footer.site-foot{ margin-top:48px; padding-block:46px; }

/* --- Detalles --- */
::selection{ background:color-mix(in srgb, var(--accent) 28%, transparent); color:var(--ink); }
hr.rule{ border-top-color:var(--rule); }
.def-row dt, .tl-item .what{ font-family:var(--text); font-weight:600; }

/* --- Columnas de lectura más contenidas --- */
.biblio, .problem-grid, .talks, .timeline, .def-list,
.sp-judges, .blog-note, .contact-grid{
  max-width:880px; margin-inline:auto;
}
.prow{ padding-block:12px; }
.prow span:first-child{ font-family:var(--text); }

/* --- Halo de la foto, un poco más presente --- */
.home-photo .halo{
  inset:-14px;
  background:
    radial-gradient(circle at 30% 26%, color-mix(in srgb, var(--accent) 30%, transparent), transparent 62%),
    radial-gradient(circle at 74% 80%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 58%);
  filter:blur(2px);
}

/* --- La portada respira sin dejar un hueco enorme antes del pie --- */
.home-intro{ margin-top:34px; padding-bottom:8px; }
.home-page + footer.site-foot, .home-page ~ footer.site-foot{ margin-top:24px; }

/* --- Contraste correcto del enlace activo en los dos temas --- */
.navlink.active, .navlink.active:hover{ background:var(--accent-ink); color:var(--paper); }
.brand-mark{ color:var(--paper); }

/* --- La portada no deja un hueco enorme antes del pie --- */
main > .page.home-page{ padding-bottom:16px; }

/* ============================================================
   Fórmulas: puestas como en un artículo, no como texto suelto
   ============================================================ */
.formula{ color:var(--ink); }
.formula .katex, .formula-display .katex{ font-style:normal; color:var(--ink); }

.formula-display{
  display:block;
  margin:18px 0 0;
  padding:18px 22px 16px;
  font-size:1rem;
  background:
    linear-gradient(color-mix(in srgb, var(--accent) 4%, var(--raised)),
                    color-mix(in srgb, var(--accent) 4%, var(--raised)));
  border:1px solid color-mix(in srgb, var(--accent) 16%, var(--rule));
  border-left:2px solid var(--accent);
  border-radius:8px;
  overflow-x:auto; overflow-y:hidden;
}
.formula-display .katex-display{ margin:0; }
.formula-display .katex{ font-size:1.18em; }

.formula-cap{
  display:block;
  margin-top:9px;
  font-family:var(--ui);
  font-size:0.7rem; font-weight:600;
  letter-spacing:0.07em; text-transform:uppercase;
  color:var(--subtext);
}
.formula-cap sup{ text-transform:none; letter-spacing:0; }

/* una fórmula suelta dentro de un párrafo no lleva caja */
p .formula, dd > .formula:not(.formula-display){ padding:0; border:none; background:none; }

/* ============================================================
   Distinción destacada (premio docente)
   ============================================================ */
.award-note{
  display:flex; align-items:center; gap:14px;
  margin-top:22px; padding:13px 18px 13px 16px;
  width:fit-content; max-width:100%;
  background:linear-gradient(135deg,
    color-mix(in srgb, var(--accent) 11%, var(--raised)),
    color-mix(in srgb, var(--accent) 4%, var(--raised)));
  border:1px solid color-mix(in srgb, var(--accent) 26%, var(--rule));
  border-radius:12px;
  box-shadow:var(--shadow-s);
}
.award-note-icon{
  width:26px; height:26px; flex:none; color:var(--accent-ink);
}
.award-note-body{ display:flex; flex-direction:column; min-width:0; }
.award-note-label{
  font-family:var(--ui); font-size:0.63rem; font-weight:700;
  letter-spacing:0.12em; text-transform:uppercase; color:var(--accent-ink);
}
.award-note-name{
  font-family:var(--display); font-weight:600; font-size:1rem;
  color:var(--ink); line-height:1.25; margin-top:3px;
}
.award-note-meta{
  font-family:var(--ui); font-size:0.75rem; color:var(--subtext); margin-top:3px;
}
.award-note.award-note-center{ margin:28px auto 0; text-align:left; }

@media (max-width:520px){
  .award-note{ gap:11px; padding:12px 14px; }
  .award-note-name{ font-size:0.92rem; }
}