body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    min-height: 250vh;
    width: 100%;
    max-width: 100%;
    background-color: #f9f9f9;
  }
  
  header {
    background-color: #0071ce;
    color: white;
    padding: 2dvh 0;
    text-align: center;
    font-size: 2.4dvh;
    font-weight: 700;
    margin-bottom: 1dvh;
    box-shadow: 0 3px 8px rgba(0, 113, 206, 0.6);
    letter-spacing: 0.05em;
  }
  
  nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    background: #005bb5;
    padding: 10px 5px;
    margin: 0 auto 3dvh auto;
    width: 95%;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 91, 181, 0.3);
  }
  
  nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.8dvh;
    padding: 0.4dvh 10px;
    border-radius: 6px;
    transition: background-color 0.3s ease;
  }
  
  nav ul li a:hover,
  nav ul li a.active {
    background-color: #003d7a;
  }

.fecha {
    font-size: 1.2rem;
    color: #ffffff;
}

main {
    max-width: 960px;
    margin: 0 auto;
}

.intro, .datos-clave, .conclusion {
    margin-bottom: 30px;
}

h3 {
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: 5px;
    margin-bottom: 15px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 25px;
    background: white;
    box-shadow: 0 0 5px rgba(0,0,0,0.1);
}

table th, table td {
    padding: 10px 12px;
    border: 1px solid #ddd;
    text-align: center;
    font-size: 0.95rem;
}

table th {
    background-color: #3498db;
    color: white;
    font-weight: 600;
}

section.tablas table tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}

.conclusion p {
    margin-bottom: 15px;
}