* {
  margin: 2px;
  border-radius: 8px;
}

body {
  margin: 0;
  color: #222;
  background: #f7f9fc;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  font-family: "Segoe UI", Arial, sans-serif;
}

/* --- CABECERA --- */
header {
  width: 100%;
  padding: 10px;
  text-align: left;
  background: #b3e5fc; /* azul claro */
  color: #003c8f;
}

/* --- TITULOS --- */
h1 {
  width: 100%;
  color: #0277bd; /* azul medio */
  font-weight: bold;
}

h2 {
  width: 100%;
  color: #2e7d32; /* verde */
  font-weight: bold;
}

h3, h4 {
  width: 100%;
  color: #333;
}

/* --- MENÚ --- */
nav {
  width: 100%;
  padding: 10px 15px;
  background: #a5d6a7; /* verde menta */
}

nav ul {
  margin: 0;
  padding: 0;
  display: flex;
  list-style: none;
}

nav li {
  position: relative;
}

nav a {
  display: inline-block;
  padding: 8px 14px;
  font-weight: bold;
  color: #064420;
  text-decoration: none;
}

nav a:hover {
  background: #ffffff;
  color: #2e7d32;
}

/* Submenú */
nav ul li ul.submenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: #c8e6c9;
  list-style: none;
  padding: 0;
  margin: 0;
  min-width: 220px;
  border: 1px solid #90a4ae;
}

nav ul li ul.submenu li {
  display: block;
}

nav ul li ul.submenu li a {
  display: block;
  padding: 10px;
  color: #064420;
}

nav ul li ul.submenu li a:hover {
  background: #ffffff;
  color: #2e7d32;
}

nav ul li:hover > ul.submenu {
  display: block;
}

/* --- CUERPO --- */
main {
  width: 70%;
  padding: 10px;
  background: #e3f2fd; /* azul suave */
  color: #000;
}

aside {
  width: 25%;
  height: 300px;
  padding: 10px;
  background: #fff8e1; /* crema claro */
  color: #333;
}

.Correccions {
  width: 47%;
  padding: 10px;
  background: #c8e6c9; /* verde claro */
  color: #000;
}

/* --- PIE --- */
footer {
  width: 100%;
  padding: 10px;
  text-align: center;
  background: #cfd8dc; /* gris claro */
  color: #000;
}

/* --- OTROS ELEMENTOS --- */
iframe {
  width: 100%;
  height: 500px;
  border: none;
}

p {
  margin-bottom: 20px;
}

ul li {
  margin-bottom: 8px;
}

/* --- TABLAS --- */
table {
  width: 100%;
  max-width: 1100px;
  font-family: Arial, sans-serif;
  text-align: left;
  border-collapse: collapse;
}

th, td {
  border: 1px solid #bbb;
  padding: 10px;
  white-space: normal;
  word-wrap: break-word;
  vertical-align: top;
}

th {
  background-color: #b9f6ca; /* verde menta suave */
  font-weight: bold;
}

caption {
  width: 100%;
  color: #0277bd;
  font-weight: bold;
}