/* ==========================================================================
   VARIABLES CONFIGURABLES (Identidad Visual)
   ========================================================================== */
:root {
  --color-institucional: #8b2323;   /* Rojo vino CESCIJUC */
  --color-texto: #333333;
  --color-fondo-pleca: #f5f5f5;      /* Gris claro para la pleca */
  --color-borde: #dddddd;
  --fuente: Arial, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--fuente);
  color: var(--color-texto);
  background-color: #ffffff;
  line-height: 1.5;
}

/* ==========================================================================
   DISEÑO PARA COMPUTADORA (Escritorio Base)
   ========================================================================== */
.contenedor-web {
  display: flex;
  max-width: 1200px;
  margin: 0 auto;
  min-height: 100vh;
}

.pleca-izquierda {
  width: 240px;
  background-color: var(--color-fondo-pleca);
  border-right: 1px solid var(--color-borde);
  padding: 20px;
  flex-shrink: 0;
  display: flex !important;
  flex-direction: column !important;
  justify-content: flex-start !important;
}

.header-pleca-movil {
  display: block;
  width: 100%;
}

.pleca-izquierda .logo-revista {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--color-institucional);
  margin-bottom: 25px;
  text-transform: uppercase;
  border-bottom: 2px solid var(--color-institucional);
  padding-bottom: 10px;
}

.boton-menu-movil {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 6px;
  padding: 5px;
}

.boton-menu-movil span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--color-institucional);
  transition: all 0.3s ease;
}

.menu-pleca {
  list-style: none;
  display: flex;
  flex-direction: column;
  margin-bottom: 30px !important;
  width: 100%;
}

.menu-pleca li {
  margin-bottom: 4px;
  width: 100%;
}

.menu-pleca a {
  text-decoration: none;
  color: #555555;
  font-size: 0.9rem;
  display: block;
  padding: 8px 12px;
  border-radius: 4px;
  transition: background-color 0.3s ease, color 0.3s ease, transform 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.menu-pleca a:hover {
  color: var(--color-institucional) !important;
  background-color: transparent !important;
  transform: scale(1.04);
  text-decoration: none;
}

.enlace-proximamente {
  opacity: 0.5;
  pointer-events: none;
  cursor: default;
}

.etiqueta-proximamente {
  font-size: 0.75rem;
  font-style: italic;
}

.contenido-principal {
  flex-grow: 1;
  padding: 30px;
}

.header-interno {
  border-bottom: 1px solid var(--color-borde);
  padding-bottom: 15px;
  margin-bottom: 25px;
}

.header-interno h1 {
  font-size: 1.6rem;
  color: var(--color-institucional);
}

.seccion-revista {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 30px;
}

.contenedor-foto-portada {
  border: 1px solid var(--color-borde);
  background-color: #fafafa;
  padding: 10px;
  text-align: center;
  height: fit-content;
}

.espacio-imagen {
  width: 100%;
  max-width: 100%;
  height: 380px;
  display: block;
  object-fit: cover;
  margin-bottom: 10px;
}

.enlace-portada {
  display: block;
  overflow: hidden;
  cursor: pointer;
}

.enlace-portada .espacio-imagen {
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.enlace-portada:hover .espacio-imagen {
  transform: scale(1.02);
  opacity: 0.9;
}

.pie-imagen {
  font-size: 0.8rem;
  color: #666666;
  line-height: 1.3;
}

.lista-articulos {
  list-style: none;
}

.bloque-articulo {
  margin-bottom: 25px;
  padding-bottom: 15px;
  border-bottom: 1px solid #eeeeee;
  text-align: justify;
  text-align-last: center;
}

.bloque-articulo h3,
.bloque-articulo .autor {
  text-align: center;
  display: block;
}

.bloque-articulo h3 a {
  color: var(--color-institucional);
  text-decoration: none;
}

.bloque-articulo h3 a:hover {
  text-decoration: underline;
}

.bloque-articulo .autor {
  font-size: 0.9rem;
  color: #666666;
  font-weight: bold;
  margin-bottom: 5px;
}

.bloque-articulo p {
  font-size: 0.9rem;
  color: #555555;
}

/* ==========================================================================
   FORMATEO EDITORIAL (Formato UNAM)
   ========================================================================== */
.renglon-articulo-unam {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 25px;
  margin-bottom: 35px;
  padding-bottom: 25px;
  border-bottom: 1px solid var(--color-borde);
  align-items: start;
}

.foto-miniatura-unam {
  width: 180px !important;
  min-width: 180px !important;
  height: 120px !important;
  overflow: hidden !important;
  border: 1px solid var(--color-borde) !important;
  background-color: #000000 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
}

.foto-miniatura-unam img {
  width: auto !important;
  max-width: 100% !important;
  height: 100% !important;
  display: block !important;
  object-fit: contain !important;
}

.texto-columna-unam h3 {
  font-size: 1.15rem;
  margin-bottom: 4px;
  text-align: left !important;
}

.texto-columna-unam .autor {
  font-size: 0.95rem;
  font-weight: bold;
  color: #111111;
  display: block;
  margin-bottom: 8px;
  text-align: left !important;
}

.texto-columna-unam p {
  font-size: 0.9rem;
  color: #444444;
  text-align: justify;
}

.texto-editorial h2 {
  font-size: 0.95rem !important;
  font-weight: normal !important;
  color: var(--color-texto);
  line-height: 1.6;
  margin: 0 auto 15px auto !important;
  text-align: justify !important;
  max-width: 750px !important;
}

.foto-presentacion {
  width: 350px !important;
  max-width: 350px !important;
  overflow: hidden;
  display: block;
  margin: 0 auto !important;
  text-align: center;
}

.foto-presentacion img {
  width: 100% !important;
  max-width: 100% !important;
  height: auto !important;
  object-fit: contain !important;
  margin: 0 auto !important;
  transition: transform 0.3s ease;
}

.foto-presentacion img:hover {
  transform: scale(1.04);
}

.contenedor-destacada-articulo {
  max-width: 100% !important;
  padding: 4px !important;
  margin-bottom: 20px !important;
}

.contenedor-destacada-articulo img {
  width: 100% !important;
  height: auto !important;
  display: block !important;
}

.pie-destacada-articulo {
  font-family: Arial, sans-serif !important;
  font-size: 0.85rem !important;
  color: #666666 !important;
  text-align: center !important;
  margin-top: 8px !important;
  line-height: 1.4 !important;
}

/* ==========================================================================
   ESTILOS: VISOR PDF Y CAJA DE DESCARGA ACADÉMICA
   ========================================================================== */
.contenedor-visor-pdf {
  width: 100%;
  max-width: 1000px;
  height: 750px;
  margin: 0 auto 40px auto;
  border: 1px solid var(--color-borde);
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
  background-color: #fafafa;
  display: block;
}

.contenedor-visor-pdf iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.seccion-descarga-acceso-abierto {
  display: block;
  background-color: #f9f9f9;
  border-top: 4px solid var(--color-institucional);
  padding: 25px 20px;
  margin: 0 auto 40px auto;
  text-align: center;
  width: 100%;
  max-width: 1000px;
  box-sizing: border-box;
}

.seccion-descarga-acceso-abierto p {
  color: #555555;
  font-size: 0.95rem;
  margin: 0 0 20px 0;
}

.grupo-botones-descarga {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
}

.boton-descarga-guinda {
  background-color: var(--color-institucional);
  color: #ffffff;
  padding: 12px 24px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  font-weight: bold;
  gap: 8px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
  transition: background-color 0.2s ease;
}

.boton-descarga-guinda:hover {
  background-color: #6b1b1b;
}

/* ==========================================================================
   ESTILOS: CAJA DE METADATOS UNIFICADA
   ========================================================================== */
.caja-metadatos-articulo {
  background-color: #ffffff;
  border: 1px solid var(--color-borde);
  padding: 30px;
  margin-bottom: 45px;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.caja-metadatos-articulo h2 {
  font-size: 1.25rem !important;
  color: var(--color-institucional) !important;
  font-weight: bold !important;
  text-align: left !important;
  margin-top: 15px !important;
  margin-bottom: 10px !important;
}

.caja-metadatos-articulo h2:first-of-type {
  margin-top: 0 !important;
}

.caja-metadatos-articulo p {
  font-size: 1.05rem !important;
  color: #222222 !important;
  line-height: 1.7 !important;
  text-align: justify !important;
  margin-bottom: 0 !important;
}

.caja-metadatos-articulo p.ultimo-parrafo {
  margin-bottom: 0 !important;
}

/* ==========================================================================
   DISEÑO OPTIMIZADO PARA MÓVIL
   ========================================================================== */
@media (max-width: 768px) {
  .contenedor-web {
    flex-direction: column !important;
  }

  .contenedor-visor-pdf,
  .contenedor-visor-pdf iframe {
    display: none !important;
  }

  .pleca-izquierda {
    width: 100% !important;
    border-right: none !important;
    border-bottom: 1px solid var(--color-borde) !important;
    padding: 15px 20px !important;
    position: sticky !important;
    top: 0;
    z-index: 1000;
    flex-direction: column !important;
  }

  .header-pleca-movil {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    width: 100% !important;
  }

  .pleca-izquierda .logo-revista {
    margin-bottom: 0 !important;
    border-bottom: none !important;
    padding-bottom: 0 !important;
  }

  .boton-menu-movil {
    display: flex !important;
  }

  .boton-menu-movil.activo span:nth-child(1) {
    transform: translateY(9px) rotate(45deg) !important;
  }
  .boton-menu-movil.activo span:nth-child(2) {
    opacity: 0 !important;
  }
  .boton-menu-movil.activo span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg) !important;
  }

  .menu-pleca.menu-oculto {
    display: none !important;
    flex-direction: column !important;
    width: 100% !important;
    margin-top: 15px !important;
    padding-top: 15px !important;
    border-top: 1px solid var(--color-borde) !important;
    margin-bottom: 0 !important;
  }

  .menu-pleca.menu-abierto {
    display: flex !important;
  }

  .menu-pleca li {
    width: 100% !important;
    margin-bottom: 5px !important;
  }

  .menu-pleca a {
    width: 100% !important;
    padding: 10px 15px !important;
    background-color: transparent !important;
    color: #555555 !important;
    border: none !important;
  }

  .menu-pleca a:hover {
    background-color: transparent !important;
    color: var(--color-institucional) !important;
    transform: scale(1.04);
  }

  .seccion-revista {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }

  .espacio-imagen {
    width: 100%;
    max-width: 300px;
    height: 420px;
    display: block;
    object-fit: cover;
    margin: 0 auto 10px auto;
  }

  .contenedor-foto-portada {
    max-width: 340px !important;
    margin: 0 auto 20px auto !important;
  }

  .renglon-articulo-unam {
    grid-template-columns: 1fr !important;
    gap: 15px !important;
  }

  .foto-miniatura-unam {
    width: 100% !important;
    max-width: 260px !important;
    height: 160px !important;
    margin: 0 auto !important;
  }

  .contenedor-destacada-articulo {
    max-width: 100% !important;
    padding: 4px !important;
    margin-bottom: 20px !important;
  }

  .seccion-descarga-acceso-abierto {
    display: block !important;
    background-color: #f9f9f9 !important;
    border-left: 4px solid var(--color-institucional) !important;
    padding: 15px !important;
    margin: 30px auto !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .seccion-descarga-acceso-abierto p {
    font-size: 0.9rem !important;
    margin: 0 0 12px 0 !important;
  }

  .grupo-botones-descarga {
    flex-direction: column !important;
    gap: 12px !important;
    width: 100% !important;
  }

  .boton-descarga-guinda {
    width: 100% !important;
    justify-content: center !important;
    padding: 14px 20px !important;
  }

  .redes-pleca-izquierda {
    display: none !important;
  }
}

/* ==========================================================================
   CONTROL DE CLIC ABSOLUTO EN LA FLECHA (CERO HOVER AUTOMÁTICO)
   ========================================================================== */
.item-con-submenu {
  position: relative;
  width: 100%;
}

.enlace-contenedor {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.enlace-contenedor a {
  flex-grow: 1;
}

.flecha-desplegable {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: 8px 12px;
  color: #555555;
  cursor: pointer;
  font-size: 0.75rem;
  border-radius: 4px;
  border: none;
  background: none;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.3s ease;
}

.flecha-desplegable:hover {
  background-color: rgba(139, 35, 35, 0.1);
  color: var(--color-institucional);
}

.flecha-rotada {
  transform: rotate(180deg);
  color: var(--color-institucional) !important;
}

.submenu-pleca {
  list-style: none;
  display: none;
  padding-left: 15px;
  margin-top: 2px;
  margin-bottom: 5px;
  width: 100%;
}

.submenu-abierto {
  display: flex !important;
  flex-direction: column !important;
}

.submenu-pleca a {
  font-size: 0.85rem !important;
  color: #666666 !important;
  padding: 6px 12px !important;
  display: block;
  border-radius: 4px;
  text-decoration: none;
  transition: color 0.3s ease, background-color 0.3s ease, transform 0.2s ease, padding-left 0.2s ease;
}

.submenu-pleca a:hover {
  color: var(--color-institucional) !important;
  background-color: transparent !important;
  transform: scale(1.03);
  padding-left: 16px !important;
}

/* ==========================================================================
   REDES SOCIALES EN LA PLECA IZQUIERDA
   ========================================================================== */
.redes-pleca-izquierda {
  display: block;
  text-align: center;
  margin-top: 0;
  padding: 10px 0;
  width: 100%;
}

.redes-pleca-izquierda a {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 34px;
  height: 34px;
  background-color: var(--color-institucional);
  color: #ffffff !important;
  font-size: 0.95rem;
  border-radius: 50%;
  margin: 0 5px;
  text-decoration: none;
  transform: none !important;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.redes-pleca-izquierda a:hover {
  transform: scale(1.1) !important;
  opacity: 0.9;
  background-color: var(--color-institucional) !important;
}