/* ==========================================================================
   Villarreal · Ciencia de la Obesidad
   Sistema: fondo crema tipo "publicación científica", morado berenjena
   como color de autoridad, verde salvia como único acento accionable.
   Tipografía: Newsreader (serif editorial/académica) + Work Sans (cuerpo)
   + IB Plex Mono (etiquetas tipo "nota de investigación").
   ========================================================================== */

:root {
  --crema: #F7F5F0;
  --berenjena: #2C1A32;
  --berenjena-suave: #4A3352;
  --salvia: #6B8E7B;
  --salvia-oscuro: #56745F;
  --lavanda: #E6E2EA;
  --linea: #D9D2CE;

  --serif: "Newsreader", "Iowan Old Style", Georgia, serif;
  --sans: "Work Sans", "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", "Courier New", monospace;

  --max-width: 1440px;
  --radius: 3px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

body {
  margin: 0;
  background: var(--crema);
  color: var(--berenjena);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* --- Etiqueta tipo "nota de investigación" --- */
.eyebrow {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--salvia-oscuro);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--salvia-oscuro);
  display: inline-block;
}

h1, h2, h3 {
  font-family: var(--serif);
  color: var(--berenjena);
  font-weight: 600;
  margin: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  padding: 14px 26px;
  border-radius: var(--radius);
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn-primary {
  background: var(--salvia);
  color: var(--crema);
}
.btn-primary:hover { background: var(--salvia-oscuro); transform: translateY(-1px); }
.btn-primary:focus-visible { outline: 2px solid var(--berenjena); outline-offset: 3px; }

.btn-ghost {
  background: transparent;
  border-color: var(--berenjena);
  color: var(--berenjena);
}
.btn-ghost:hover { background: var(--berenjena); color: var(--crema); }
.btn-ghost:focus-visible { outline: 2px solid var(--salvia-oscuro); outline-offset: 3px; }

/* --- Nav --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(247, 245, 240, 0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--linea);
}
.nav .wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
}
.nav-brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.nav-brand img { height: 40px; width: auto; }
.nav-brand-text {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 17px;
  color: var(--berenjena);
  letter-spacing: 0.01em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--berenjena-suave);
}
.nav-links a:hover { color: var(--salvia-oscuro); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: stretch;
  gap: 5px;
  width: 34px;
  height: 34px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--berenjena);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Hero --- */
.hero {
  padding: 96px 0 88px;
  border-bottom: 1px solid var(--linea);
}
.hero .wrap {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 64px;
  align-items: start;
}
.hero-copy { padding-top: 4px; }
.hero-copy .eyebrow { margin-bottom: 22px; }
.hero h1 {
  font-size: clamp(34px, 4.4vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.01em;
}
.hero h1 em {
  font-style: italic;
  color: var(--salvia-oscuro);
}
.hero-subtitulo {
  margin: 26px 0 34px;
  max-width: 46ch;
  color: var(--berenjena-suave);
  font-size: 17.5px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* --- Figura editorial (placeholder de retrato) --- */
.figura {
  border: 1px solid var(--linea);
  background: var(--lavanda);
  padding: 10px;
}
.figura-marco {
  aspect-ratio: 4 / 5;
  border: 1px solid var(--berenjena);
  background:
    linear-gradient(160deg, rgba(44,26,50,0.06), rgba(44,26,50,0) 55%),
    var(--crema);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.figura-marco svg { width: 34%; height: 34%; color: var(--berenjena); opacity: 0.55; }
.figura-foto {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figura-caption {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--berenjena-suave);
  padding: 12px 4px 4px;
  letter-spacing: 0.02em;
}

/* --- Secciones generales --- */
.seccion { padding: 88px 0; }
.seccion-titulo-wrap { max-width: 640px; margin-bottom: 48px; }
.seccion-titulo-wrap .eyebrow { margin-bottom: 18px; }
.seccion h2 { font-size: clamp(26px, 3vw, 34px); line-height: 1.22; }

/* --- Bio --- */
.bio {
  background: var(--lavanda);
  border-top: 1px solid var(--linea);
  border-bottom: 1px solid var(--linea);
}
.bio-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}
.bio-texto p { color: var(--berenjena-suave); font-size: 16.5px; }
.bio-texto p:first-child { margin-top: 0; }

.notas {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--berenjena);
  padding-left: 22px;
}
.notas li {
  position: relative;
  padding: 0 0 20px 30px;
  font-size: 15px;
  color: var(--berenjena);
}
.notas li:last-child { padding-bottom: 0; }
.notas li .num {
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--salvia-oscuro);
}

/* --- Contacto / footer --- */
.contacto {
  background: var(--berenjena);
  color: var(--crema);
}
.contacto .eyebrow { color: #B9AEC0; }
.contacto .eyebrow::before { background: #B9AEC0; }
.contacto h2 { color: var(--crema); }
.contacto-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: start;
}
.contacto-copy p {
  color: #D8CFDD;
  max-width: 48ch;
  font-size: 16.5px;
}
.contacto-datos {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(247,245,240,0.18);
}
.contacto-datos li {
  border-bottom: 1px solid rgba(247,245,240,0.18);
  padding: 16px 0;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
}
.contacto-datos .label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #B9AEC0;
}
.contacto-datos a { text-decoration: none; font-size: 16px; }
.contacto-datos a:hover { color: var(--salvia); }

.footer-bottom {
  border-top: 1px solid rgba(247,245,240,0.18);
  margin-top: 56px;
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: #9C90A6;
}

/* --- Responsive --- */
@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 40px; }
  .figura { max-width: 320px; }
  .bio-grid { grid-template-columns: 1fr; gap: 34px; }
  .contacto-grid { grid-template-columns: 1fr; gap: 34px; }

  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 0 20px;
    background: var(--crema);
    border-bottom: 1px solid var(--linea);
  }
  .nav-links.is-open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 12px 0; width: 100%; }
  .nav-links a.btn { display: inline-flex; margin-top: 6px; }
}

@media (max-width: 560px) {
  .wrap { padding: 0 20px; }
  .hero { padding: 48px 0 48px; }
  .seccion { padding: 56px 0; }
  .figura { max-width: 260px; margin: 0 auto; }
  .nav-brand-text { display: none; }
  .contacto-datos li { flex-wrap: wrap; }
}