body {
    font-family: Arial, sans-serif;
    background-color: #f4f7fa;
    margin: 0;
    padding: 0;
}

header {
    background-color: #1e90ff;
    color: white;
    padding: 20px;
    text-align: center;
}

nav a {
    margin: 0 15px;
    text-decoration: none;
    color: white;
}

nav a:hover {
    text-decoration: underline;
}

main {
    display: flex;
    justify-content: space-between;
    padding: 20px;
}

section {
    width: 70%;
}

article {
    border: 1px solid #ccc;
    margin-bottom: 20px;
    padding: 15px;
    background-color: white;
}

.fecha {
    color: gray;
    font-size: 0.9em;
}

aside {
    width: 25%;
    background-color: #e9f0f5;
    padding: 15px;
    border-left: 2px solid #ccc;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px;
    margin-top: 20px;
}

form input {
    padding: 8px;
    width: 80%;
    margin-bottom: 10px;
}

form button {
    padding: 8px 12px;
    background-color: #1e90ff;
    color: white;
    border: none;
    cursor: pointer;
}