/* ======= GENERAL ======= */
body {
  font-family: Arial, sans-serif;
  background-color: #f4f9ff;
  margin: 0;
  padding: 20px;
  color: #333;
}

/* ======= ENCABEZADO ======= */
header {
  background-color: #ffffff;
  padding: 20px;
  border-bottom: 2px solid #e0e7ff;
  text-align: center;
}
header h1 {
  margin: 0;
  font-size: 2rem;
  color: #2563eb;
}
nav {
  margin-top: 10px;
}
nav a {
  color: #2563eb;
  text-decoration: none;
  margin: 0 10px;
  font-weight: bold;
}
nav a:hover {
  color: #f97316;
}

/* ======= CONTENIDO PRINCIPAL EN DOS COLUMNAS ======= */
.contenedor-principal {
  display: flex;
  gap: 40px;
  align-items: flex-start;
  margin-top: 30px;
}

/* ======= MAIN ======= */
main {
  flex: 2;
  min-width: 300px;
}
main section {
  margin-bottom: 40px;
}
main h2, main h3, main h4 {
  color: #1e3a8a;
  margin-bottom: 10px;
}
main p, main li {
  font-size: 16px;
  line-height: 1.6;
  color: #333;
}
main ul {
  padding-left: 20px;
  margin-bottom: 20px;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 15px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}
th, td {
  border: 1px solid #dbeafe;
  padding: 10px;
  text-align: left;
}
thead {
  background-color: #e0f2fe;
  color: #1e3a8a;
}
tbody tr:hover {
  background-color: #f0f9ff;
}
td:first-child {
  font-weight: bold;
  color: #2563eb;
}

/* ======= ASIDE ======= */
aside {
  flex: 1;
  min-width: 280px;
  background-color: #ffffff;
  padding: 20px;
  border-left: 4px solid #3b82f6;
  border-radius: 1rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
aside h3 {
  font-size: 1.2rem;
  color: #1e3a8a;
  margin-bottom: 10px;
}
aside ul {
  list-style: none;
  padding-left: 0;
}
aside ul li {
  margin-bottom: 10px;
  border-bottom: 1px solid #e5e7eb;
  padding-bottom: 5px;
}
aside ul li a {
  text-decoration: none;
  color: #374151;
  font-weight: 500;
  transition: color 0.2s;
}
aside ul li a:hover {
  color: #f97316;
}

/* ======= VIDEO DE YOUTUBE BONITO ======= */
aside iframe {
  width: 100%;
  height: 180px;
  border-radius: 10px;
  border: none;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* ======= GALERÍA DE IMÁGENES ======= */
aside img {
  width: 100%;
  max-height: 180px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 10px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

/* ======= FORMULARIO ======= */
form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
form label {
  font-weight: bold;
  color: #2563eb;
}
form input, form textarea {
  padding: 10px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-size: 1rem;
}
form textarea {
  resize: vertical;
}
form button {
  background-color: #2563eb;
  color: white;
  padding: 10px;
  border: none;
  border-radius: 6px;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s ease;
}
form button:hover {
  background-color: #1e40af;
}

/* ======= PIE DE PÁGINA ======= */
footer {
  text-align: center;
  padding: 20px;
  border-top: 2px solid #e0e7ff;
  color: #6b7280;
  font-size: 0.9rem;
}