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

/* Base */
body {
  font-family: Arial, Helvetica, sans-serif;
  background: #f4f7fb;
  color: #222;
  line-height: 1.6;
  padding: 20px;
}

/* Header */
header {
  margin-bottom: 25px;
  padding-bottom: 10px;
  border-bottom: 2px solid #3a7afe;
}

header h1 {
  font-size: 28px;
  color: #1f3c88;
}

header p {
  font-size: 14px;
  color: #555;
}

/* Main */
main {
  max-width: 800px;
}

/* Secciones */
section {
  background: #ffffff;
  border: 1px solid #dce3f1;
  border-left: 6px solid #3a7afe;
  padding: 15px;
  margin-bottom: 20px;
}

section h2 {
  font-size: 20px;
  margin-bottom: 10px;
  color: #3a7afe;
}

/* Listas */
ul {
  list-style: square;
  margin-left: 20px;
}

li {
  margin-bottom: 6px;
}

/* Links */
a {
  color: #1f6ae1;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  margin-top: 30px;
}

footer a {
  font-size: 14px;
  color: #444;
}