* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: #ffffff;
  color: #333;
}

/* BARRA SUPERIOR */
header {
  position: fixed;
  top: 0;
  width: 100%;
  background: #263238;
  color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  z-index: 1000;
}

.logo {
  font-size: 20px;
}

nav a {
  color: white;
  text-decoration: none;
  margin-left: 25px;
  font-size: 16px;
}

nav a:hover {
  color: #8bc34a;
}

/* PORTADA */
.hero {
  height: 480px;
  background: linear-gradient(rgba(25, 35, 40, .8), rgba(25, 35, 40, .8)), url("img/fondo.jpg");
  background-size: cover;
  background-position: center;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  text-align: center;
}

.hero h1 {
  font-size: 70px;
  font-weight: 300;
  letter-spacing: 8px;
}

/* CONTENIDO */
section {
  padding: 60px 14%;
}

.card {
  background: white;
  padding: 30px;
  margin-bottom: 40px;
  box-shadow: 0 3px 15px rgba(0, 0, 0, .15);
}

.card h2 {
  color: #263238;
  border-left: 8px solid #9ccc65;
  padding-left: 15px;
  margin-bottom: 15px;
}

.card h3 {
  background: #c8e6c9;
  padding: 8px;
  color: #1b5e20;
  margin-bottom: 15px;
}

.card h4 {
  color: #263238;
  margin-top: 25px;
  margin-bottom: 10px;
}

.card p {
  font-size: 18px;
  text-align: justify;
  margin-bottom: 15px;
  line-height: 1.5;
}

.card ul {
  margin-left: 30px;
}

/* BOTÓN DE ENLACES A EVIDENCIAS */
.boton-evidencia {
  display: inline-block;
  background: #263238;
  color: white;
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 6px;
  font-size: 16px;
  margin: 10px 0 20px 0;
  transition: background .2s ease;
}

.boton-evidencia:hover {
  background: #8bc34a;
  color: #1b1b1b;
}

/* GALERÍA DE IMÁGENES EN EVIDENCIAS */
.galeria-evidencia {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin: 15px 0 20px 0;
}

.galeria-evidencia img {
  width: 100%;
  max-width: 360px;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, .2);
  flex: 1 1 300px;
}

/* TABLA */
table {
  width: 100%;
  border-collapse: collapse;
}

th {
  background: #263238;
  color: white;
  padding: 15px;
}

td {
  border: 1px solid #ddd;
  padding: 12px;
  text-align: center;
}

/* FOOTER */
footer {
  background: #263238;
  color: white;
  padding: 25px;
  text-align: center;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  header {
    flex-direction: column;
    padding: 15px 20px;
  }

  nav a {
    margin: 0 10px;
    font-size: 14px;
  }

  .hero h1 {
    font-size: 40px;
    letter-spacing: 4px;
  }

  section {
    padding: 40px 6%;
  }

  .card {
    padding: 20px;
  }

  .card p {
    font-size: 16px;
  }
}