/* === estilo base === */
body {
  font-family: Arial, Helvetica, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  color: #222;
  background-color: #fafafa;
}

/* === encabezado === */
header {
  background-color: #fff;
  border-bottom: 1px solid #ddd;
  padding: 1.5rem 1rem;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 1.8rem;
}

nav {
  margin-top: 0.5rem;
}

nav a {
  color: #333;
  text-decoration: none;
  margin: 0 0.5rem;
  font-weight: bold;
}

nav a:hover {
  color: #0077ff;
}

/* === secciones === */
main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

section {
  margin-bottom: 3rem;
}

h2 {
  border-bottom: 2px solid #000;
  padding-bottom: 0.25rem;
  font-size: 1.4rem;
}

/* === proyectos === */
article {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 1rem;
  margin-bottom: 1.5rem;
}

article img {
  width: 100%;
  height: auto;
  border-radius: 4px;
  margin-top: 0.5rem;
}

/* === pie de página === */
footer {
  text-align: center;
  padding: 1rem;
  background: #fff;
  border-top: 1px solid #ddd;
  color: #666;
  font-size: 0.9rem;
}