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

/* Variables de color */
:root {
    --bg-color: #ffffff;
    --text-color: #202122;
    --text-secondary: #54595d;
    --border-color: #a2a9b1;
    --link-color: #0645ad;
    --hover-color: #0b0080;
    --header-bg: #ffffff;
    --nav-bg: #f8f9fa;
    --footer-bg: #f8f9fa;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Lato', 'Helvetica', 'Arial', sans-serif;
    font-size: 14px;
    line-height: 1.6;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
}

header h1 {
    font-size: 28px;
    font-weight: normal;
    margin-bottom: 5px;
}

header h1 a {
    color: var(--text-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

header h1 img {
    height: 50px;
    width: auto;
    margin-right: 15px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 16px;
}

/* Navigation */
nav {
    background-color: var(--nav-bg);
    border-bottom: 1px solid var(--border-color);
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    padding: 10px 0;
}

nav a {
    color: var(--link-color);
    text-decoration: none;
    font-size: 14px;
}

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

/* Main content */
main {
    padding: 20px 0;
    min-height: 60vh;
}

main h1 {
    font-size: 32px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

main h2 {
    font-size: 24px;
    margin: 30px 0 15px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 5px;
}

main h3 {
    font-size: 20px;
    margin: 20px 0 10px;
}

main p {
    margin-bottom: 15px;
}

main ul, main ol {
    margin-left: 30px;
    margin-bottom: 15px;
}

main a {
    color: var(--link-color);
    text-decoration: underline;
}

main a:hover {
    color: var(--hover-color);
}

/* Glosario */
dl {
    margin-bottom: 20px;
}

dt {
    font-weight: bold;
    margin-top: 15px;
}

dd {
    margin-left: 20px;
    color: var(--text-secondary);
}

/* Forms */
.contact-form {
    max-width: 600px;
    margin-top: 20px;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input, select, textarea {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 2px;
    font-family: inherit;
    font-size: 14px;
}

button {
    background-color: var(--link-color);
    color: white;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    font-size: 14px;
}

button:hover {
    background-color: var(--hover-color);
}

.form-note {
    color: var(--text-secondary);
    font-size: 12px;
    margin-top: 10px;
}

/* Book featured */
.book-featured {
    background-color: var(--nav-bg);
    border: 1px solid var(--border-color);
    padding: 20px;
    margin: 20px 0;
}

.cta-button {
    display: inline-block;
    background-color: var(--link-color);
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    margin-top: 10px;
}

.cta-button:hover {
    background-color: var(--hover-color);
    text-decoration: none;
}

/* Article */
.article-meta {
    color: var(--text-secondary);
    font-size: 12px;
    margin-bottom: 30px;
}

/* Footer */
footer {
    background-color: var(--footer-bg);
    border-top: 1px solid var(--border-color);
    padding: 20px 0;
    margin-top: 40px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 12px;
}

/* Portal structure */
.portal-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.portal {
    background-color: var(--nav-bg);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: 4px;
}

.portal h3 {
    margin-top: 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.portal h3 a {
    color: var(--text-color);
    text-decoration: none;
}

.portal h3 a:hover {
    text-decoration: underline;
}

.portal ul {
    margin: 15px 0;
    padding-left: 20px;
}

.portal-link {
    display: inline-block;
    color: var(--link-color);
    text-decoration: none;
    margin-top: 10px;
}

.portal-link:hover {
    text-decoration: underline;
}

/* Featured article */
.featured-article {
    background-color: var(--nav-bg);
    border: 1px solid var(--border-color);
    padding: 20px;
    margin: 20px 0;
}

.read-more {
    color: var(--link-color);
    text-decoration: none;
}

.read-more:hover {
    text-decoration: underline;
}

/* Category sections */
.category-section {
    margin: 30px 0;
}

.category-section h2 {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 5px;
}

/* Breadcrumb */
.breadcrumb {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.breadcrumb a {
    color: var(--link-color);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    nav ul {
        flex-direction: column;
        gap: 10px;
    }
    
    main h1 {
        font-size: 28px;
    }
    
    main h2 {
        font-size: 22px;
    }
    
    header h1 a {
        flex-direction: column;
        align-items: flex-start;
    }
    
    header h1 img {
        margin-bottom: 10px;
    }
}