body {
      font-family: Arial, sans-serif;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
      background-color: #fff;
    }

    /* ======== ENCABEZADO ======== */
    /* ==== ESTILOS GENERALES ==== */
header {
  background-color: #ffffff;
  color: rgb(12, 107, 61);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  position: relative;
}

header h1 {
  margin: 0;
  font-size: 1em;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
}

nav ul li {
  position: relative;
}

nav ul li a {
  color: rgb(0, 112, 30);
  text-decoration: none;
  padding: 10px 15px;
  display: block;
}

nav ul li a:hover {
  border-bottom: solid rgb(31, 78, 20);
}

/* ==== SUBMENÚ ==== */
/* ==== SUBMENÚ ==== */
.submenu-items {
  display: none;
  position: absolute;
  background-color: #ffffff;
  top: 100%;
  left: 0;
  min-width: 180px;
  flex-direction: column;
  z-index: 10;

  /* Animación */
  opacity: 0;
  transform: translateY(5px);
  transition: opacity .25s ease, transform .25s ease;
}

.submenu.open .submenu-items {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

/* ==== MENÚ HAMBURGUESA (MÓVIL) ==== */
.menu-toggle {
  display: none;
  position: absolute;
  top: 10px;
  right: 20px;
  z-index: 10000;
  font-size: 2rem;
  background: transparent;
  border: none;
  color: rgb(10, 82, 17);
  cursor: pointer;
}

/* ==== RESPONSIVE ==== */
@media (max-width: 768px) {
  header{
    z-index: 9999;
  }
  nav.menu {
    position: absolute;
    top: 60px;
    left: 0;
    background-color: #c3c3c3;
    width: 100%;
    display: none;
    flex-direction: column;
    z-index: 9999;
  }

  nav.menu.active {
    display: flex;
  }

  nav ul {
    flex-direction: column;
  }

  nav ul li {
    width: 100%;
  }

  .submenu-items {
    max-height: 0;
    overflow: hidden;
    position: static;
    background-color: #a3a3a3;
    opacity: 0;
    transform: translateY(-5px);
    transition: max_height 0.3s ease-out;
  }

  .submenu.open .submenu-items {
    display: flex;
    opacity: 1;
    max-height: 500px;
    transform: translateY(0);
  }

  .menu-toggle {
    display: block;
  }
}

.titulo-institucion {
    padding: 0px 50px;
    font-size: 50px;
    font-family: 'Dubai Medium';
    background: linear-gradient(50deg,rgb(11, 11, 11) 0%,green 35%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0;
}
.parent {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    grid-template-rows: repeat(3, 200px);
    gap: 12px;
    padding: 0 100px;
}

/* Estilo general */
.grid-item {
    position: relative;
    overflow: hidden;
    
    border-radius: 12px;
}

/* Imagen */
.grid-item img {
    width: 100%;
    height: 100%;
    mask-image: linear-gradient(360deg,rgb(0, 0, 0) 65%,transparent);
    object-fit: cover;
}

/* Texto encima */
.grid-item .texto1 {
    position: absolute;
    top: 1px;
    left: 10px;
    color: rgb(0, 0, 0);
    font-size: 15px;
    font-weight: bold;
}
/* Texto encima */
.grid-item .texto2 {
    position: absolute;
    top: 20px;
    left: 10px;
    color: rgb(0, 0, 0);
    font-size: 12px;
    font-weight: bold;
}

/* POSICIONES DEL GRID — EXACTAS SEGÚN TU IMAGEN */

.div1 {
    grid-column: 1 / 2;
    grid-row: 1 / 2;
}

.div2 {
    grid-column: 2 / 3;
    grid-row: 1 / 2;
}

.div3 {
    grid-column: 3 / 4;
    grid-row: 1 / 2;
}

.div4 {
    grid-column: 4 / 5;
    grid-row: 1 / 4;  /* ocupa filas 1,2,3 */
}

.div5 {
    grid-column: 5 / 6;
    grid-row: 1 / 2;
}

.div6 {
    grid-column: 1 / 2;
    grid-row: 2 / 4; /* filas 2 y 3 */
}

.div7 {
    grid-column: 2 / 4; /* columnas 2 y 3 */
    grid-row: 2 / 4;   /* filas 2 y 3 */
}

.div8 {
    grid-column: 5 / 6;
    grid-row: 2 / 4; /* filas 2 y 3 */
}

@media (max-width: 1199px) {
    .parent {
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: auto;
        padding: 0 40px;
    }

    /* Redefinir posiciones */
    .div1 { grid-column: 1 / 2; }
    .div2 { grid-column: 2 / 3; }
    .div3 { grid-column: 3 / 4; }

    .div4 { grid-column: 1 / 2; }
    .div5 { grid-column: 2 / 3; }

    .div6 { grid-column: 3 / 4; }
    .div7 { grid-column: 1 / 3; }
    
    .div8 { grid-column: 3 / 4; }
}

/* -------------------- */
/* MÓVIL — 1 columna     */
/* -------------------- */
@media (max-width: 767px) {

    .titulo-institucion {
        font-size: 35px;
        padding: 0 20px;
    }

    .parent {
        grid-template-columns: 1fr;
        padding: 0 20px;
    }

    /* Todos a una columna */
    .div1, .div2, .div3, .div4, .div5,
    .div6, .div7, .div8 {
        grid-column: 1 !important;
        grid-row: auto !important;
    }

    .grid-item img {
        height: 250px;
    }
}

.contenedor-videos {
  display: grid;
  gap: 20px;
  padding: 0 100px;
  grid-template-columns: 1fr; /* móvil por defecto */
}

/* Tablet */
@media (min-width: 600px) {
  .contenedor-videos {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* PC (3 videos por fila) */
@media (min-width: 1024px) {
  .contenedor-videos {
    grid-template-columns: repeat(3, 1fr);
  }
}

.tarjeta {
  background: #ffffff;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tarjeta:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.video video {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.texto {
  padding: 15px;
  text-align: center;
}

.texto h1 {
  font-size: 1.2rem;
  margin: 5px 0;
  color: #333;
  font-weight: 700;
}

.texto h3 {
  font-size: 0.9rem;
  color: #777;
  margin: 0;
}