:root {
    --bg-color: #f9f9fb;
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --accent-blue: #0984e3;
    --accent-green: #00b894;
    --white: #ffffff;
    --border-color: #edf2f7;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Filters */
.main-header {
    background-color: var(--white);
    padding: 40px 0 20px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-area h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 4px;
}

.logo-area h1 span {
    color: var(--accent-blue);
}

.logo-area p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 24px;
}

.filters-nav {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
    scrollbar-width: none;
    /* Firefox */
}

.filters-nav::-webkit-scrollbar {
    display: none;
    /* Chrome/Safari */
}

.filter-pill {
    background-color: #f1f3f5;
    border: none;
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.filter-pill:hover {
    background-color: #e9ecef;
    color: var(--text-primary);
}

.filter-pill.active {
    background-color: var(--text-primary);
    color: var(--white);
}

/* News Grid */
.news-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 40px 0;
}

@media (min-width: 768px) {
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* News Cards */
.news-card {
    background-color: var(--white);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    height: 100%;
}

.news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.card-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
    padding: 4px 10px;
    border-radius: 4px;
    background-color: rgba(9, 132, 227, 0.1);
    color: var(--accent-blue);
}

/* Custom category colors */
.category-oposiciones {
    background-color: rgba(214, 48, 49, 0.1);
    color: #d63031;
}

.category-becas {
    background-color: rgba(0, 184, 148, 0.1);
    color: var(--accent-green);
}

.category-udc {
    background-color: rgba(108, 92, 231, 0.1);
    color: #6c5ce7;
}

.category-fp {
    background-color: rgba(253, 150, 68, 0.1);
    color: #e67e22;
}

.category-cursos {
    background-color: rgba(45, 152, 218, 0.1);
    color: #4b7bec;
}

.category-general {
    background-color: rgba(100, 110, 120, 0.1);
    color: #4a5568;
}

.news-card h2 {
    font-size: 1.25rem;
    line-height: 1.3;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-weight: 600;
}

.card-meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    display: flex;
    gap: 12px;
}

.card-content {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    flex-grow: 1;
}

.card-content ul {
    margin-top: 8px;
    padding-left: 20px;
}

.btn-read-more {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--white);
    color: var(--accent-blue);
    border: 1px solid var(--accent-blue);
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    text-align: center;
    transition: all 0.2s ease;
}

.btn-read-more:hover {
    background-color: var(--accent-blue);
    color: var(--white);
}

/* Skeleton Loading */
.skeleton-card {
    height: 350px;
    background: linear-gradient(90deg, #f0f0f0 25%, #f8f8f8 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: 12px;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

/* Article Detail Page */
.news-detail-container {
    background-color: var(--white);
    border-radius: 12px;
    padding: 30px;
    margin: 40px auto;
    max-width: 800px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

@media (min-width: 768px) {
    .news-detail-container {
        padding: 50px;
    }
}

.news-detail-container h1 {
    font-size: 2rem;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 20px;
    font-weight: 700;
}

.detail-meta {
    display: flex;
    gap: 15px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.detail-content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.detail-content p {
    margin-bottom: 20px;
}

.detail-content ul,
.detail-content ol {
    margin-left: 20px;
    margin-bottom: 20px;
}

.detail-content li {
    margin-bottom: 8px;
}

.school-auto-link {
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 500;
    transition: text-decoration 0.2s ease, color 0.2s ease;
}

.school-auto-link:hover {
    text-decoration: underline;
    color: #076bbb;
}

.btn-back {
    display: inline-flex;
    align-items: center;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.btn-back:hover {
    color: var(--accent-blue);
}

.btn-original-source {
    display: inline-block;
    padding: 14px 28px;
    background-color: var(--accent-blue);
    color: var(--white);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.btn-original-source:hover {
    background-color: #076bbb;
    transform: translateY(-2px);
}

/* Pagination */
.pagination-container {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
    margin-bottom: 20px;
}

.page-btn {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    background-color: var(--white);
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
}

.page-btn:hover:not(:disabled) {
    background-color: var(--border-color);
    color: var(--text-primary);
}

.page-btn.active {
    background-color: var(--text-primary);
    color: var(--white);
    border-color: var(--text-primary);
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: default;
}

/* Advertisement Banner */
.custom-ad {
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: var(--bg-color);
    border: 2px solid;
    /* Color del borde se inyectará dinámicamente */
    border-radius: 12px;
    padding: 24px;
    margin: 30px 0;
    text-align: center;
    gap: 16px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

@media (min-width: 768px) {
    .custom-ad {
        flex-direction: row;
        text-align: left;
        align-items: center;
        justify-content: space-between;
        padding: 30px;
    }
}

.custom-ad:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.custom-ad__logo {
    flex-shrink: 0;
}

.custom-ad__logo img {
    max-width: 120px;
    height: auto;
    object-fit: contain;
}

.custom-ad__content {
    flex-grow: 1;
    margin: 0 20px;
}

.custom-ad__headline {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-weight: 700;
    line-height: 1.3;
}

.custom-ad__description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 0;
}

.custom-ad__cta {
    flex-shrink: 0;
    margin-top: 10px;
}

@media (min-width: 768px) {
    .custom-ad__cta {
        margin-top: 0;
    }
}

.custom-ad__button {
    display: inline-block;
    padding: 12px 24px;
    background-color: #508f02;
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    border-radius: 8px;
    transition: opacity 0.2s ease;
    white-space: nowrap;
}

.custom-ad__button:hover {
    opacity: 0.9;
}

/* Footer */
.main-footer {
    padding: 60px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Post Navigation */
.post-navigation {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 50px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

@media (min-width: 768px) {
    .post-navigation {
        grid-template-columns: 1fr 1fr;
    }
}

.nav-prev,
.nav-next {
    display: flex;
    flex-direction: column;
    padding: 20px;
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.nav-prev {
    align-items: flex-start;
    text-align: left;
}

.nav-next {
    align-items: flex-end;
    text-align: right;
}

.nav-prev:hover,
.nav-next:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    border-color: var(--accent-blue);
}

.nav-empty {
    display: none;
}

@media (min-width: 768px) {
    .nav-empty {
        display: block;
    }
}

.nav-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    margin-bottom: 8px;
}

.nav-title {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.3;
}

/* Relacionadas */
.related-news-section {
    margin: 3rem 0;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.related-news-section h3 {
    font-size: 1.4rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.related-news-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.related-news-card {
    display: flex;
    flex-direction: column;
    padding: 18px;
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.related-news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.related-news-card h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-top: 10px;
    font-weight: 700;
    line-height: 1.3;
}