/* =========================================================
   TRIPLADIG — Sistema de diseño (v2)
   Retos en la Tributación de las Plataformas Digitales
   PID2022-136767OA-I00 · Universidad Pablo de Olavide
   Paleta UPO: azul + amarillo, sobre base clara
   ========================================================= */

:root{
  /* Azul — vivo, no "corporativo oscuro" */
  --color-blue-900: #142a63;
  --color-blue-700: #2347c9;
  --color-blue-600: #2f57e0;
  --color-blue-500: #4f70ea;
  --color-blue-200: #c7d4fb;
  --color-blue-100: #e7ecfd;
  --color-blue-50:  #f5f7fe;

  /* Amarillo — acento UPO */
  --color-yellow-600: #e2a400;
  --color-yellow-500: #ffbe1b;
  --color-yellow-400: #ffcf4d;
  --color-yellow-100: #fff4da;
  --color-yellow-50:  #fffaef;

  --color-ink:      #1a2140;
  --color-ink-soft: #5b6480;
  --color-line:     #e6e9f5;
  --color-paper:    #ffffff;
  --color-paper-2:  #f7f8fd;

  --font-display: "Poppins", "Segoe UI Rounded", "Segoe UI", sans-serif;
  --font-body: "Plus Jakarta Sans", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;

  --maxw: 1160px;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow-sm: 0 1px 3px rgba(20,42,99,.06), 0 1px 1px rgba(20,42,99,.04);
  --shadow-md: 0 12px 28px rgba(20,42,99,.10), 0 3px 8px rgba(20,42,99,.05);
  --shadow-lg: 0 24px 56px rgba(20,42,99,.14);

  --space-1: .5rem;
  --space-2: .875rem;
  --space-3: 1.5rem;
  --space-4: 2.25rem;
  --space-5: 3.5rem;
  --space-6: 5.5rem;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-paper);
  line-height: 1.65;
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: var(--color-blue-700); text-decoration:none; }
a:hover{ color: var(--color-blue-600); }

h1,h2,h3,h4{
  font-family: var(--font-display);
  color: var(--color-ink);
  line-height: 1.2;
  margin: 0 0 .55em;
  font-weight: 600;
  letter-spacing: -.01em;
}
h1{ font-size: clamp(2.5rem, 3.8vw, 3.6rem); font-weight: 700; letter-spacing: -.02em; }
h2{ font-size: clamp(1.9rem, 2.9vw, 2.5rem); }
h3{ font-size: 1.4rem; }
p{ margin: 0 0 1em; color: var(--color-ink-soft); }
.lede{ font-size: 1.2rem; color: var(--color-ink-soft); }

.container{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.55em;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: .8rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--color-blue-700);
  margin-bottom: var(--space-1);
}
.eyebrow::before{
  content:"";
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--color-yellow-500);
  display:inline-block;
}

/* ---------- Botones ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  padding: .85em 1.7em;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor:pointer;
  transition: all .15s ease;
}
.btn-primary{
  background: var(--color-blue-700);
  color: #fff;
  border-color: var(--color-blue-700);
}
.btn-primary:hover{ background: var(--color-blue-600); border-color: var(--color-blue-600); color:#fff; }
.btn-outline{
  background: transparent;
  border-color: var(--color-blue-700);
  color: var(--color-blue-700);
}
.btn-outline:hover{ background: var(--color-blue-50); color: var(--color-blue-700); }
.btn-accent{
  background: var(--color-yellow-500);
  color: var(--color-blue-900);
  border-color: var(--color-yellow-500);
}
.btn-accent:hover{ background: var(--color-yellow-400); border-color: var(--color-yellow-400); }
.btn-ghost{
  background: transparent;
  border-color: var(--color-line);
  color: var(--color-blue-900);
}
.btn-ghost:hover{ background: var(--color-blue-50); border-color: var(--color-blue-200); }

/* ---------- Header ---------- */
.site-header{
  position: sticky; top:0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--color-line);
}
.site-header .container{
  display:flex; align-items:center; justify-content:space-between;
  height: 80px;
}
.brand{
  display:flex; align-items:center; gap:.75em;
  font-family: var(--font-display);
  font-weight:700; font-size:1.35rem;
  color: var(--color-ink);
}
.brand:hover{ color: var(--color-ink); }
.brand-mark{
  width:42px; height:42px; border-radius:13px;
  background: var(--color-blue-700);
  color: var(--color-yellow-400);
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-display); font-weight:700; font-size:1.1rem;
  flex-shrink:0;
}
.brand small{
  display:block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: .7rem;
  letter-spacing: .01em;
  color: var(--color-ink-soft);
  margin-top: .12em;
}
.nav-links{
  display:flex; align-items:center; gap: var(--space-4);
  list-style:none; margin:0; padding:0;
}
.nav-links a{
  font-family: var(--font-display);
  font-weight:600; font-size:.98rem; color: var(--color-ink);
  padding: .3em 0;
  border-bottom: 3px solid transparent;
  border-radius: 2px;
}
.nav-links a:hover, .nav-links a.active{
  color: var(--color-blue-700);
  border-bottom-color: var(--color-yellow-500);
}
.nav-cta{ display:flex; align-items:center; gap: var(--space-3); }
.nav-toggle{ display:none; }

@media (max-width: 860px){
  .nav-links{
    position: fixed; inset: 80px 0 0 0;
    background: var(--color-paper);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-3);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: all .2s ease;
    border-top: 1px solid var(--color-line);
  }
  .nav-links.open{ opacity:1; transform: translateY(0); pointer-events:auto; }
  .nav-toggle{
    display:flex; align-items:center; justify-content:center;
    width:44px; height:44px; border-radius:12px; border:1px solid var(--color-line);
    background:#fff; cursor:pointer; font-size:1.1rem;
  }
  .nav-cta .btn-ghost-header{ display:none; }
}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  background: linear-gradient(180deg, var(--color-blue-50) 0%, #ffffff 78%);
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  top:-160px; right:-140px;
  width:520px; height:520px;
  border-radius:50%;
  background: radial-gradient(closest-side, rgba(47,87,224,.14), transparent 72%);
  pointer-events:none;
}
.hero::after{
  content:"";
  position:absolute;
  bottom:-120px; left:-100px;
  width:380px; height:380px;
  border-radius:50%;
  background: radial-gradient(closest-side, rgba(255,190,27,.20), transparent 72%);
  pointer-events:none;
}
.hero .container{
  position:relative;
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap: var(--space-5);
  align-items:center;
}
.hero .lede{ max-width: 46ch; }
.hero-actions{ display:flex; gap: var(--space-2); margin-top: var(--space-3); flex-wrap:wrap; }

.hero-card{
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-3);
  box-shadow: var(--shadow-md);
}
.hero-card h4{
  font-family: var(--font-display);
  font-size:.8rem; text-transform:uppercase; letter-spacing:.07em;
  margin-bottom: var(--space-2); color: var(--color-ink-soft); font-weight: 700;
}
.hero-fact{ display:flex; gap:1em; padding: .8em 0; border-bottom: 1px solid var(--color-line); }
.hero-fact:last-child{ border-bottom:none; }
.hero-fact .num{
  font-family: var(--font-display); font-weight:700; font-size:1.3rem;
  min-width:2.6em;
  white-space: nowrap;
  color: var(--color-blue-700);
}
.hero-fact .lbl{ color: var(--color-ink); font-weight:600; font-size:.98rem; }
.hero-fact .lbl small{ display:block; color: var(--color-ink-soft); font-size:.85rem; font-weight:500; margin-top:.15em; }

@media (max-width: 900px){
  .hero .container{ grid-template-columns: 1fr; }
}

/* ---------- Secciones genéricas ---------- */
section{ padding: var(--space-6) 0; }
.section-alt{ background: var(--color-blue-50); }
.section-tint-yellow{ background: var(--color-yellow-50); }

.section-head{
  display:flex; align-items:flex-end; justify-content:space-between; gap: var(--space-3);
  margin-bottom: var(--space-4);
  flex-wrap:wrap;
}
.section-head .head-text{ max-width: 62ch; }
.section-head h2{ margin-bottom:.3em; }

/* ---------- Líneas de investigación ---------- */
.lines-grid{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}
.line-card{
  background:#fff;
  border:1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  position:relative;
}
.line-card .line-index{
  font-family: var(--font-display);
  font-weight:700;
  font-size:.95rem;
  width: 2.6em; height: 2.6em;
  border-radius: 14px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom: var(--space-2);
}
.line-card:nth-child(1) .line-index{ background: var(--color-blue-100); color: var(--color-blue-700); }
.line-card:nth-child(2) .line-index{ background: var(--color-yellow-100); color: var(--color-yellow-600); }
.line-card h3{ margin-bottom:.5em; }
.line-card ul{ margin:.9em 0 0; padding-left: 1.15em; color: var(--color-ink-soft); font-size:.98rem; }
.line-card li{ margin-bottom:.4em; }

@media (max-width: 760px){ .lines-grid{ grid-template-columns: 1fr; } }

/* ---------- Tarjetas de actividad ---------- */
.cards-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}
.activity-card{
  background:#fff;
  border:1px solid var(--color-line);
  border-radius: var(--radius);
  overflow:hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .15s ease, box-shadow .15s ease;
  display:flex; flex-direction:column;
}
.activity-card:hover{ transform: translateY(-4px); box-shadow: var(--shadow-md); }
.activity-card .tag-row{
  display:flex; align-items:center; justify-content:space-between;
  padding: var(--space-2) var(--space-3) 0;
}
.tag{
  display:inline-block;
  font-family: var(--font-display);
  font-size:.74rem; font-weight:700; letter-spacing:.03em;
  padding: .35em .8em; border-radius:999px;
}
.tag-congreso{ background: var(--color-blue-100); color: var(--color-blue-700); }
.tag-ponencia{ background: var(--color-yellow-100); color: var(--color-yellow-600); }
.tag-publicacion{ background: var(--color-paper-2); color: var(--color-ink-soft); border: 1px solid var(--color-line); }
.card-date{ font-size:.85rem; color: var(--color-ink-soft); font-weight:600; }
.activity-card .card-body{ padding: var(--space-2) var(--space-3) var(--space-3); flex:1; display:flex; flex-direction:column; }
.activity-card h3{ font-size:1.2rem; margin-bottom:.4em; }
.activity-card p{ font-size:.98rem; flex:1; }
.card-place{
  display:flex; align-items:center; gap:.4em;
  font-size:.87rem; color: var(--color-ink-soft); font-weight:600;
  margin-top:.7em;
}

@media (max-width: 980px){ .cards-grid{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px){ .cards-grid{ grid-template-columns: 1fr; } }

/* ---------- Franja proyecto (datos) ---------- */
.meta-strip{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  border-top:1px solid var(--color-line);
  border-bottom:1px solid var(--color-line);
}
.meta-item{
  padding: var(--space-3);
  border-left:1px solid var(--color-line);
}
.meta-item:first-child{ border-left:none; }
.meta-item .meta-num{ font-family: var(--font-display); font-weight:700; font-size:1.9rem; color: var(--color-blue-700); }
.meta-item .meta-lbl{ font-size:.9rem; color: var(--color-ink-soft); margin-top:.25em; font-weight: 500; }

@media (max-width: 760px){
  .meta-strip{ grid-template-columns: 1fr 1fr; }
  .meta-item:nth-child(3){ border-left:none; border-top:1px solid var(--color-line); }
  .meta-item:nth-child(4){ border-top:1px solid var(--color-line); }
}

/* ---------- Bloque destacado (blog, citas, etc.) ---------- */
.spotlight-card{
  background:#fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: var(--shadow-md);
  max-width: 680px;
}
.spotlight-card .spot-label{
  display:inline-block;
  font-family: var(--font-display);
  font-size:.75rem; font-weight:700; letter-spacing:.06em; text-transform:uppercase;
  color: var(--color-blue-700);
  background: var(--color-blue-100);
  padding:.35em .8em; border-radius:999px;
  margin-bottom: var(--space-2);
}
.spotlight-card h3{ margin-bottom:.5em; }

/* ---------- Footer ---------- */
.site-footer{
  background: var(--color-blue-900);
  color: rgba(255,255,255,.72);
  padding: var(--space-5) 0 var(--space-3);
  font-size:.95rem;
  border-top: 5px solid var(--color-yellow-500);
}
.footer-grid{
  display:grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid rgba(255,255,255,.14);
}
.footer-grid h4{
  color:#fff; font-family: var(--font-display); font-size:.85rem;
  text-transform:uppercase; letter-spacing:.05em; margin-bottom: var(--space-2);
}
.footer-grid ul{ list-style:none; margin:0; padding:0; }
.footer-grid li{ margin-bottom:.6em; }
.footer-grid a{ color: rgba(255,255,255,.72); }
.footer-grid a:hover{ color: var(--color-yellow-400); }
.footer-brand p{ color: rgba(255,255,255,.62); max-width: 40ch; }
.footer-brand .brand{ color:#fff; }
.footer-brand .brand-mark{ background: var(--color-yellow-500); color: var(--color-blue-900); }
.footer-bottom{
  display:flex; justify-content:space-between; align-items:center;
  padding-top: var(--space-3); flex-wrap:wrap; gap: var(--space-2);
  font-size:.85rem; color: rgba(255,255,255,.5);
}
.funding-note{
  display:flex; align-items:center; gap:.6em;
  font-size:.85rem; color: rgba(255,255,255,.5);
}

@media (max-width: 780px){ .footer-grid{ grid-template-columns: 1fr; } }

/* ---------- Page intro (páginas interiores) ---------- */
.page-intro{
  position:relative;
  background: linear-gradient(180deg, var(--color-blue-50) 0%, #ffffff 100%);
  padding: var(--space-5) 0 var(--space-4);
}
.page-intro::before{
  content:"";
  position:absolute; top:-120px; right:-120px;
  width:360px; height:360px; border-radius:50%;
  background: radial-gradient(closest-side, rgba(255,190,27,.18), transparent 72%);
  pointer-events:none;
}
.page-intro .container{ position:relative; }
.page-intro h1{ max-width: 20ch; }
.page-intro .lede{ max-width: 60ch; }

.breadcrumb{
  display:flex; align-items:center; gap:.5em;
  font-size:.88rem; font-weight:600; color: var(--color-ink-soft);
  margin-bottom: var(--space-3);
}
.breadcrumb a{ color: var(--color-ink-soft); }
.breadcrumb a:hover{ color: var(--color-blue-700); }

/* ---------- Equipo investigador ---------- */
.team-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}
@media (max-width: 980px){ .team-grid{ grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px){ .team-grid{ grid-template-columns: 1fr; } }

.person-card{
  background:#fff;
  border:1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-3);
  box-shadow: var(--shadow-sm);
}
.person-head{ display:flex; gap: var(--space-2); align-items:flex-start; margin-bottom: var(--space-2); }
.avatar{
  flex-shrink:0;
  width:56px; height:56px; border-radius:14px;
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-display); font-weight:700; font-size:1.05rem;
}
.avatar-blue{ background: var(--color-blue-100); color: var(--color-blue-700); }
.avatar-yellow{ background: var(--color-yellow-100); color: var(--color-yellow-600); }
.avatar img{ width:100%; height:100%; object-fit:cover; border-radius:14px; }

.person-name{ font-size:1.12rem; margin-bottom:.15em; }
.person-role{ font-size:.88rem; color: var(--color-blue-700); font-weight:700; margin-bottom:.1em; }
.person-uni{ font-size:.85rem; color: var(--color-ink-soft); font-weight:500; }

.ip-badge{
  display:inline-flex; align-items:center; gap:.35em;
  font-family: var(--font-display);
  font-size:.68rem; font-weight:700; letter-spacing:.04em;
  background: var(--color-yellow-500); color: var(--color-blue-900);
  padding:.22em .6em; border-radius:999px;
  margin-left:.5em;
  vertical-align: middle;
}

.person-summary{ font-size:.95rem; color: var(--color-ink-soft); margin-bottom:.6em; }

.bio-toggle{ margin-top:.4em; }
.bio-toggle summary{
  cursor:pointer;
  font-family: var(--font-display);
  font-weight:600; font-size:.88rem;
  color: var(--color-blue-700);
  list-style:none;
  display:inline-flex; align-items:center; gap:.35em;
}
.bio-toggle summary::-webkit-details-marker{ display:none; }
.bio-toggle summary::after{
  content:"↓"; font-size:.8em; transition: transform .15s ease;
}
.bio-toggle[open] summary::after{ transform: rotate(180deg); }
.bio-toggle .bio-full{
  margin-top:.8em; padding-top:.8em; border-top:1px solid var(--color-line);
  font-size:.93rem; color: var(--color-ink-soft);
}
.bio-toggle .bio-full p{ margin-bottom:.85em; font-size:inherit; color:inherit; }
.bio-toggle .bio-full p:last-child{ margin-bottom:0; }

.note-card{
  background: var(--color-yellow-50);
  border: 1px dashed var(--color-yellow-500);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  font-size:.92rem;
  color: var(--color-ink-soft);
}

/* ---------- Aviso de plazo (CFP) ---------- */
.deadline-banner{
  display:flex; align-items:center; gap: var(--space-3);
  background: var(--color-blue-900);
  color:#fff;
  border-radius: var(--radius);
  padding: var(--space-3);
  flex-wrap:wrap;
  justify-content: space-between;
}
.deadline-banner .dl-text{ display:flex; align-items:center; gap: var(--space-2); }
.deadline-banner .dl-num{
  font-family: var(--font-display); font-weight:700; font-size:2.1rem;
  color: var(--color-yellow-400); line-height:1;
}
.deadline-banner .dl-num small{ display:block; font-family: var(--font-body); font-size:.62rem; text-transform:uppercase; letter-spacing:.06em; color: rgba(255,255,255,.6); font-weight:700; margin-top:.2em; }
.deadline-banner p{ color: rgba(255,255,255,.78); margin:0; font-size:.95rem; }
.deadline-banner strong{ color:#fff; }

/* ---------- Timeline de ponencias ---------- */
.timeline-year{
  display:flex; align-items:center; gap: var(--space-2);
  margin: var(--space-4) 0 var(--space-2);
}
.timeline-year:first-child{ margin-top:0; }
.timeline-year .yr{
  font-family: var(--font-display); font-weight:700; font-size:1.4rem;
  color: var(--color-blue-700);
}
.timeline-year::after{ content:""; flex:1; height:1px; background: var(--color-line); }

.timeline-list{ list-style:none; margin:0; padding:0; }
.timeline-item{
  display:grid;
  grid-template-columns: 15px 1fr;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-line);
}
.timeline-item:last-child{ border-bottom:none; }
.timeline-dot{
  width:11px; height:11px; border-radius:50%;
  background: var(--color-yellow-500);
  margin-top:.35em;
}
.timeline-item.is-ip .timeline-dot{ background: var(--color-blue-700); }
.timeline-body .t-person{ font-weight:700; color: var(--color-ink); font-size:.98rem; }
.timeline-body .t-title{ font-style:italic; color: var(--color-ink-soft); }
.timeline-body .t-venue{ color: var(--color-ink-soft); font-size:.92rem; }
.timeline-body .t-date{
  display:inline-block; margin-left:.5em;
  font-family: var(--font-display); font-weight:600; font-size:.78rem;
  color: var(--color-blue-700); background: var(--color-blue-100);
  padding:.12em .6em; border-radius:999px;
}

/* ---------- Obra colectiva destacada ---------- */
.book-feature{
  background: linear-gradient(155deg, var(--color-blue-900), var(--color-blue-700));
  color:#fff;
  border-radius: var(--radius);
  padding: var(--space-5);
  display:grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
  align-items:center;
}
.book-cover{
  width:120px; height:160px; border-radius:12px; flex-shrink:0;
  background: linear-gradient(160deg, var(--color-yellow-400), var(--color-yellow-500));
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-display); font-weight:700; font-size:.85rem;
  color: var(--color-blue-900); text-align:center; padding: var(--space-2);
  box-shadow: var(--shadow-lg);
}
.book-feature h2{ color:#fff; margin-bottom:.3em; }
.book-feature p{ color: rgba(255,255,255,.78); }
.book-meta{ display:flex; gap: var(--space-3); flex-wrap:wrap; margin-top: var(--space-2); font-size:.9rem; }
.book-meta span{ color: rgba(255,255,255,.65); }
.book-meta strong{ color: var(--color-yellow-400); font-family: var(--font-display); }

@media (max-width: 720px){
  .book-feature{ grid-template-columns: 1fr; text-align:center; }
  .book-cover{ margin:0 auto; }
}

/* ---------- Capítulos de la obra colectiva ---------- */
.section-label{
  font-family: var(--font-display); font-weight:700; font-size:1.05rem;
  color: var(--color-blue-900);
  margin: var(--space-4) 0 var(--space-2);
  padding-bottom: var(--space-1);
  border-bottom: 2px solid var(--color-yellow-500);
}

.chapter-grid{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2);
}
@media (max-width: 860px){ .chapter-grid{ grid-template-columns: 1fr; } }

.chapter-card{
  background:#fff;
  border:1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
}
.chapter-head{ display:flex; gap:.8em; align-items:flex-start; }
.chapter-num{
  flex-shrink:0;
  width:2em; height:2em; border-radius:9px;
  background: var(--color-blue-100); color: var(--color-blue-700);
  font-family: var(--font-display); font-weight:700; font-size:.85rem;
  display:flex; align-items:center; justify-content:center;
}
.chapter-title{ font-size:.98rem; font-weight:700; color: var(--color-ink); margin-bottom:.15em; line-height:1.35; }
.chapter-author{ font-size:.86rem; color: var(--color-blue-700); font-weight:600; }
.chapter-card .bio-toggle{ margin-top:.5em; margin-left: calc(2em + .8em); }
.chapter-card .bio-full{ font-size:.9rem; }

/* ---------- Publicaciones destacadas ---------- */
.pub-groups{ display:grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
@media (max-width: 860px){ .pub-groups{ grid-template-columns: 1fr; } }
.pub-group h4{
  font-family: var(--font-display); font-weight:700; font-size:.85rem;
  text-transform:uppercase; letter-spacing:.05em; color: var(--color-blue-700);
  margin-bottom: var(--space-2);
}
.pub-list{ list-style:none; margin:0; padding:0; }
.pub-item{ padding: var(--space-2) 0; border-bottom:1px solid var(--color-line); font-size:.92rem; }
.pub-item:last-child{ border-bottom:none; }
.pub-item .p-author{ font-weight:700; color: var(--color-ink); }
.pub-item .p-title{ font-style:italic; color: var(--color-ink-soft); }
.pub-item .p-ref{ display:block; color: var(--color-ink-soft); font-size:.86rem; margin-top:.2em; }

/* ---------- Tesis doctorales ---------- */
.thesis-card{
  background:#fff; border:1px solid var(--color-line); border-radius: var(--radius);
  padding: var(--space-3); display:flex; gap: var(--space-2); align-items:flex-start;
}
.thesis-icon{
  flex-shrink:0; width:2.6em; height:2.6em; border-radius:12px;
  background: var(--color-yellow-100); color: var(--color-yellow-600);
  display:flex; align-items:center; justify-content:center; font-size:1.1rem;
}

/* ---------- Blog: listado ---------- */
.blog-grid{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}
@media (max-width: 760px){ .blog-grid{ grid-template-columns: 1fr; } }

.blog-card{
  background:#fff; border:1px solid var(--color-line); border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  transition: transform .15s ease, box-shadow .15s ease;
  display:flex; flex-direction:column; height:100%;
}
.blog-card:hover{ transform: translateY(-3px); box-shadow: var(--shadow-md); }
.blog-card .post-date{ font-size:.82rem; font-weight:700; color: var(--color-blue-700); text-transform:uppercase; letter-spacing:.04em; }
.blog-card h3{ margin: .5em 0 .5em; font-size:1.25rem; }
.blog-card p{ flex:1; }
.blog-card .post-author{
  display:flex; align-items:center; gap:.6em; margin-top: var(--space-2);
  font-size:.88rem; color: var(--color-ink-soft); font-weight:600;
}
.blog-card .post-author .avatar{ width:2.2em; height:2.2em; font-size:.78rem; border-radius:9px; }

.blog-card.is-featured{
  grid-column: 1 / -1;
  display:grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); align-items:center;
}
@media (max-width: 760px){ .blog-card.is-featured{ grid-template-columns: 1fr; } }
.blog-card.is-featured h3{ font-size:1.6rem; }
.featured-tag{
  display:inline-block; font-family: var(--font-display); font-weight:700; font-size:.72rem;
  letter-spacing:.05em; text-transform:uppercase; color: var(--color-yellow-600);
  background: var(--color-yellow-100); padding:.3em .8em; border-radius:999px; margin-bottom:.6em;
}
.featured-visual{
  background: linear-gradient(155deg, var(--color-blue-900), var(--color-blue-700));
  border-radius: var(--radius); min-height:180px;
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-display); font-weight:700; color: rgba(255,255,255,.9);
  font-size:1.1rem; text-align:center; padding: var(--space-3);
}

/* ---------- Blog: artículo ---------- */
.article-shell{ max-width: 760px; margin:0 auto; }
.article-header .eyebrow{ justify-content:center; }
.article-header{ text-align:center; }
.article-header h1{ max-width: 26ch; margin-left:auto; margin-right:auto; font-size: clamp(1.8rem, 3.2vw, 2.6rem); }
.article-byline{
  display:flex; align-items:center; justify-content:center; gap: var(--space-2);
  margin-top: var(--space-3);
}
.article-byline .avatar{ width:3em; height:3em; }
.article-byline .by-name{ font-weight:700; color: var(--color-ink); text-align:left; }
.article-byline .by-role{ font-size:.85rem; color: var(--color-ink-soft); text-align:left; }

.article-body{ max-width: 720px; margin: var(--space-5) auto 0; font-size:1.08rem; }
.article-body h2{ margin-top: 1.6em; font-size:1.5rem; }
.article-body h3{ margin-top: 1.3em; }
.article-body p{ color: var(--color-ink); line-height:1.75; }
.article-body blockquote{
  margin: var(--space-3) 0; padding: var(--space-2) var(--space-3);
  border-left: 4px solid var(--color-yellow-500);
  background: var(--color-blue-50);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-ink-soft); font-style:italic;
}
.article-body blockquote footer{
  margin-top:.6em; font-style:normal; font-size:.82rem; color: var(--color-ink-faint, #8992a6);
}
.article-body blockquote footer a{ color: inherit; }
.article-body ul, .article-body ol{ padding-left: 1.3em; color: var(--color-ink); }
.article-body li{ margin-bottom:.5em; }
.article-body a{ text-decoration: underline; text-decoration-color: var(--color-yellow-500); text-underline-offset:.15em; }
.article-footnotes{
  margin-top: var(--space-5); padding-top: var(--space-3); border-top:1px solid var(--color-line);
  font-size:.88rem; color: var(--color-ink-soft);
}
.back-to-blog{
  display:inline-flex; align-items:center; gap:.5em; margin-bottom: var(--space-3);
  font-family: var(--font-display); font-weight:600; font-size:.92rem; color: var(--color-blue-700);
}

.skip-link{
  position:absolute; left:-999px; top:auto;
}
.skip-link:focus{
  position:fixed; left:1rem; top:1rem; z-index:1000;
  background:#fff; padding:.6em 1em; border-radius:6px; box-shadow: var(--shadow-md);
}