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

/* 🎨 Fondo general */
.wallpaper {
  position: fixed;          
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: url('../img/fondo-IA.jpeg') center/cover no-repeat;
  z-index: -2;
  opacity: 25%;              
}

body {
    background: black;
}

.container {
    max-width: 90rem;
    margin: 0 auto;
}

/* 🎯 Encabezado */
h1 {
    text-align: center;
    color: #6beff4;
    font-family: 'Orbitron', sans-serif;
    text-shadow: 0 0 0.65rem #6beff4;
}

header {
    min-height: 30rem;
    color: #6beff4;
    font-size: 1.5rem;
    text-align: center;
}

header img {
     width: 25rem;
     height: 25rem;
     object-fit: cover;
     border-radius: 100%;
     margin: 1.5rem;
     border: 0.3rem solid #6beff4;
     box-shadow: 0 0 0.65rem #00bfff, 0 0 1.25rem #00bfff, 0 0 2.5rem #00bfff, 0 0 5rem #00bfff;
}

/* 📚 Foja Académica */
.foja-academica {
    border: 0.1rem solid #00bfff;
    margin: 1rem 0 2rem 0;
}

main article {
    color: #00bfff;
    min-height: 20rem;
    margin: 2rem 1rem 1rem 1rem;
    padding: 1rem;
    border: 0.2rem solid #00bfff;
    transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease, color 0.18s ease;
    transform: translateY(-0.12rem) scale(1.02);
}

main article h3 {
    text-align: center;
    font-size: 1.8rem;
    font-family: 'Orbitron', sans-serif;
}

main article ul {
    font-size: 1.1rem;
    text-align: left;
    font-family: 'Orbitron', sans-serif;
    margin-left: 0.7rem;
}

.materias-1, .materias-2 {
    display: grid;
    grid-template-columns: 25% 25% 25% 25%;
    justify-content: space-between;
    margin: 0 0 1rem 0;
}

main article:hover {
    background-color: #00bfff;
    color: #000;
}

/* 👥 Grupo */
.grupo {
    border: 0.1rem solid #00bfff;
    margin: 1rem 0 1rem 0;
}

nav { 
    min-height: 18rem;
    margin: 1.5rem 0 1rem 0;
    display: flex;
    justify-content: space-evenly;
    text-align: center;
    font-family: 'Orbitron', sans-serif;
}

nav figure a {
    display: inline-block;
    text-decoration: none;
    color: #00bfff;
    padding: 0.3rem 0.6rem;
}

nav figure a img {
    width: 14rem;
    height: 14rem;
    object-fit: cover;
    border-radius: 100%;
    border: 0.2rem solid #6beff4;
}

nav figure a:hover figcaption,
nav figure a:focus figcaption {
    text-shadow: 0 0 0.65rem #00bfff, 0 0 1.25rem #00bfff, 0 0 2.5rem #00bfff, 0 0 5rem #00bfff;
    color: #00bfff;
    transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease, color 0.18s ease;
    transform: translateY(-0.12rem) scale(1.02);
}

nav figure a:hover img,
nav figure a:focus img {
   transform: translateY(-0.12rem) scale(1.02);
   box-shadow:  0 0 0.65rem #00bfff, 0 0 1.25rem #00bfff, 0 0 2.5rem #00bfff, 0 0 5rem #00bfff;
}

nav figure a:active {
  transform: translateY(0) scale(0.97);
}

/* 🧭 Menú de navegación */
.menu-nav {
    border: 0.1rem solid #00bfff;
    margin: 2rem 0 2rem 0;
}

.site-nav {
  display: block;
  min-height: auto;
  text-align: center;
  justify-content: space-between;
  padding: 1rem 0;
  margin-bottom: 1rem;
}

.site-nav .nav-list {
  display: inline-flex;
  gap: 7rem;
  list-style: none;
  align-items: center;
}

.site-nav .nav-link {
  display: inline-block;
  font-size: 2rem;
  padding: 0.5rem;
  color: #00bfff;                
  background: transparent;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}

.site-nav .nav-link:hover,
.site-nav .nav-link:focus {
    text-shadow: 0 0 0.65rem #00bfff, 0 0 1.25rem #00bfff, 0 0 2.5rem #00bfff, 0 0 5rem #00bfff;
    color: #00bfff;
    transform: translateY(-0.12rem) scale(1.02);
}

.site-nav .nav-link:active {
  transform: translateY(0) scale(0.995);
}

/* 🏛️ Datos de universidad */
.info-uni {
    border: 0.1rem solid #00bfff;
    padding: 0.5rem 1rem;
}

aside {
    text-align: left;
    color: #00bfff;
    font-family: 'Orbitron', sans-serif;
}

/* ⚖️ Footer */
footer {
    margin-top: 3rem;
    min-height: 4rem;
    color: #00bfff;
    text-align: center;
    font-family: 'Orbitron', sans-serif;
}

/* =======================
   📱 ESTILOS PARA CELULAR
   ======================= */
@media (max-width: 768px) {

  body {
    background: black;
    font-size: 14px;
  }

  header {
    min-height: 15rem;
  }

  header img {
    width: 12rem;
    height: 12rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  main article {
    margin: 1rem 0.5rem;
    padding: 0.8rem;
  }

  /* 📚 Foja académica: una sola columna */
  .materias-1,
  .materias-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  /* 👥 Grupo: fotos en columna */
  nav {
    flex-direction: column;
    align-items: center;
  }

  nav figure a img {
    width: 10rem;
    height: 10rem;
  }

  /* 🧭 Menú principal en columna */
  .site-nav .nav-list {
    flex-direction: column;
    gap: 1rem;
  }

  .site-nav .nav-link {
    font-size: 1.2rem;
  }

  /* 🧾 Texto más legible */
  aside, footer {
    font-size: 0.9rem;
    text-align: center;
  }
}