/* ==========================================================================
   ESTILOS GLOBALES - Víctor Gutiérrez Marcos
   Diseño elegante con tipografía serif inspirada en documentos académicos
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Source+Sans+3:wght@300;400;500;600&display=swap');

:root {
    --color-primary: #5F2987;
    --color-primary-dark: #4a1f6b;
    --color-primary-light: #7a3ca8;
    --color-primary-pale: #f3eef7;
    --color-bg: #E2EFD9;
    --color-bg-light: #edf5e7;
    --color-bg-cream: #faf9f6;
    --color-white: #ffffff;
    --color-text: #2d2d2d;
    --color-text-muted: #555555;
    --color-text-light: #777777;
    --color-border: #c8d8c0;
    --color-border-light: #dde8d6;
    --color-accent-gold: #b8860b;
    --color-accent-gold-light: #daa520;
    --font-display: 'Palatino Linotype', Palatino, 'Book Antiqua', 'URW Palladio L', Georgia, serif;
    --font-body: 'Palatino Linotype', Palatino, 'Book Antiqua', 'URW Palladio L', Georgia, serif;
    --font-ui: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;
    --max-width: 1000px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.75;
    color: var(--color-text);
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-light) 50%, var(--color-bg) 100%);
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* HEADER */
.site-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: 3rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.site-header::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255,255,255,0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255,255,255,0.05) 0%, transparent 40%);
    pointer-events: none;
}

.site-header::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent 0%, var(--color-accent-gold) 20%, var(--color-accent-gold-light) 50%, var(--color-accent-gold) 80%, transparent 100%);
}

.header-content { max-width: var(--max-width); margin: 0 auto; position: relative; z-index: 1; }

.site-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 0.75rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.site-title a { color: var(--color-white); text-decoration: none; transition: opacity var(--transition-fast); }
.site-title a:hover { opacity: 0.9; }

.site-description {
    font-family: var(--font-body);
    font-size: 1.15rem;
    font-weight: 400;
    font-style: italic;
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
}

/* NAVEGACIÓN */
.main-nav {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.nav-container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
.nav-list { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 0.25rem; padding: 0.5rem 0; }

.nav-list li a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--color-text);
    text-decoration: none;
    font-family: var(--font-ui);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border-radius: 4px;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-list li a::after {
    content: '';
    position: absolute;
    bottom: 0.4rem; left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: calc(100% - 1.5rem);
    height: 2px;
    background: var(--color-primary);
    transition: transform var(--transition-fast);
}

.nav-list li a:hover { color: var(--color-primary); }
.nav-list li a:hover::after { transform: translateX(-50%) scaleX(1); }
.nav-list li a.active { color: var(--color-white); background: var(--color-primary); }
.nav-list li a.active::after { display: none; }

/* CONTENIDO PRINCIPAL */
.main-content { flex: 1; padding: 3rem 1.5rem; }
.content-container { max-width: var(--max-width); margin: 0 auto; }

.page-content {
    background: var(--color-white);
    border-radius: 8px;
    padding: 3rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border-light);
    position: relative;
    animation: fadeInUp 0.5s ease-out;
}

.page-content::before {
    content: '';
    position: absolute;
    top: 12px; left: 12px; right: 12px; bottom: 12px;
    border: 1px solid var(--color-border-light);
    border-radius: 4px;
    pointer-events: none;
    opacity: 0.5;
}

.section-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--color-primary);
    display: inline-block;
    position: relative;
}

.section-title::after {
    content: '◆';
    position: absolute;
    bottom: -10px; left: 50%;
    transform: translateX(-50%);
    background: var(--color-white);
    padding: 0 0.5rem;
    color: var(--color-primary);
    font-size: 0.6rem;
}

.content-text { font-size: 1.05rem; line-height: 1.85; position: relative; z-index: 1; }
.content-text p { margin-bottom: 1.25rem; text-align: justify; hyphens: auto; }

.content-text h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 2rem 0 1rem 0;
    padding-left: 1rem;
    border-left: 3px solid var(--color-accent-gold);
}

.content-text ul { margin: 1rem 0 1.5rem 1.5rem; }
.content-text li { margin-bottom: 0.6rem; }
.content-text li::marker { color: var(--color-primary); }

.content-text a {
    color: var(--color-primary);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all var(--transition-fast);
}

.content-text a:hover { color: var(--color-primary-dark); border-bottom-color: var(--color-primary); }
.content-text em { color: var(--color-text-muted); font-style: italic; }

/* CAJA DESTACADA */
.highlight-box {
    background: linear-gradient(135deg, var(--color-primary-pale) 0%, var(--color-bg-cream) 100%);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-primary);
    border-radius: 0 8px 8px 0;
    padding: 1.5rem 2rem;
    margin: 2rem 0;
}

.highlight-box p { margin-bottom: 1rem; }

.highlight-box a.highlight-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 4px;
    font-family: var(--font-ui);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-fast);
    border: none;
}

.highlight-box a.highlight-link:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* TARJETAS DE TEMARIO */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
    position: relative;
    z-index: 1;
}

.tema-card {
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-bg-cream) 100%);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
    transition: all var(--transition-normal);
    position: relative;
    animation: fadeInUp 0.5s ease-out;
    animation-fill-mode: both;
}

.tema-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.tema-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--color-primary-light); }
.tema-card:hover::before { transform: scaleX(1); }
.tema-card a { display: block; padding: 1.75rem; text-decoration: none; color: inherit; }

.tema-card-number {
    font-family: var(--font-ui);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tema-card-number::before { content: ''; width: 20px; height: 2px; background: var(--color-accent-gold); }

.tema-card-title {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.tema-card-desc {
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin: 0;
    font-style: italic;
}

.tema-card:nth-child(1) { animation-delay: 0.1s; }
.tema-card:nth-child(2) { animation-delay: 0.2s; }
.tema-card:nth-child(3) { animation-delay: 0.3s; }
.tema-card:nth-child(4) { animation-delay: 0.4s; }
.tema-card:nth-child(5) { animation-delay: 0.5s; }

/* LISTA DE TEMAS */
.temas-list { margin-top: 1.5rem; position: relative; z-index: 1; }
.tema-group { margin-bottom: 1.5rem; }

/* ACORDEÓN */
.tema-group-header {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-white);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: 0.9rem 1.25rem;
    border-radius: 6px;
    margin-bottom: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    user-select: none;
    transition: all var(--transition-fast);
}

.tema-group-header:hover {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
}

.tema-group-header::before { content: '§'; font-size: 1.3rem; opacity: 0.7; }

.tema-group-header .accordion-icon {
    font-size: 1.2rem;
    transition: transform var(--transition-normal);
    opacity: 0.8;
}

.tema-group-header.active .accordion-icon {
    transform: rotate(180deg);
}

.tema-group-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out;
    background: var(--color-white);
    border-radius: 0 0 6px 6px;
    margin-top: -4px;
    padding-top: 4px;
}

.tema-group-content.open {
    max-height: 5000px;
    transition: max-height 0.6s ease-in;
}

.tema-group-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-white);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: 0.9rem 1.25rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: var(--shadow-sm);
}

.tema-group-title::before { content: '§'; font-size: 1.3rem; opacity: 0.7; }

.tema-item {
    padding: 0.9rem 1rem;
    border-bottom: 1px solid var(--color-border-light);
    transition: background var(--transition-fast);
    border-radius: 4px;
    margin-bottom: 2px;
}

.tema-item:hover { background: var(--color-bg-light); }
.tema-item:last-child { border-bottom: none; }

.tema-item a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    font-family: var(--font-ui);
    transition: color var(--transition-fast);
}

.tema-item a:hover { color: var(--color-primary-dark); text-decoration: underline; }
.tema-item-title { color: var(--color-text); font-weight: 400; }

.tema-item-unavailable {
    color: var(--color-text-light);
    font-family: var(--font-ui);
    font-weight: 500;
}

.tema-item-unavailable a {
    color: var(--color-text-light);
    text-decoration: none;
    font-weight: 500;
}

.tema-item-unavailable a:hover {
    color: var(--color-text-muted);
    text-decoration: underline;
}

/* RECURSOS */
.resource-item {
    background: linear-gradient(135deg, var(--color-bg-light) 0%, var(--color-white) 100%);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1.75rem;
    margin-bottom: 1.25rem;
    position: relative;
    z-index: 1;
    transition: all var(--transition-fast);
}

.resource-item:hover { box-shadow: var(--shadow-md); border-color: var(--color-primary-light); }

.resource-item h4 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.resource-item p { font-size: 1rem; color: var(--color-text-muted); margin-bottom: 1rem; }
.resource-item ul { font-size: 0.95rem; color: var(--color-text-muted); margin: 0.75rem 0 1.25rem 1.25rem; }
.resource-item li { margin-bottom: 0.4rem; }

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.5rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    text-decoration: none;
    border-radius: 6px;
    font-family: var(--font-ui);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ENLACES */
.links-section { margin-bottom: 2rem; position: relative; z-index: 1; }

.links-section h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-accent-gold);
    display: inline-block;
}

.links-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 0.75rem;
}

.links-list li a {
    display: block;
    padding: 0.9rem 1.25rem;
    background: var(--color-bg-light);
    border: 1px solid var(--color-border-light);
    border-radius: 6px;
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.links-list li a:hover {
    background: var(--color-primary-pale);
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateX(4px);
}

/* SOBRE MÍ */
.about-info { text-align: center; padding: 2rem 0; position: relative; z-index: 1; }

.about-info h3 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.about-info .title {
    font-family: var(--font-body);
    font-size: 1.15rem;
    color: var(--color-primary);
    font-style: italic;
    margin-bottom: 0.25rem;
}

.about-info .promotion {
    font-family: var(--font-ui);
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.about-info .contact-link {
    display: inline-block;
    color: var(--color-primary);
    text-decoration: none;
    font-family: var(--font-ui);
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-primary);
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.about-info .contact-link:hover { background: var(--color-primary); color: var(--color-white); }

.linkedin-badge {
    margin-top: 2.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.social-link svg {
    width: 24px;
    height: 24px;
}

/* BREADCRUMB */
.breadcrumb {
    font-family: var(--font-ui);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border-light);
    position: relative;
    z-index: 1;
}

.breadcrumb a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-fast); }
.breadcrumb a:hover { color: var(--color-primary-dark); text-decoration: underline; }
.breadcrumb span { margin: 0 0.5rem; color: var(--color-text-light); }

/* FOOTER */
.site-footer {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    padding: 1.5rem 2rem;
    text-align: center;
    margin-top: auto;
    position: relative;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent 0%, var(--color-accent-gold) 20%, var(--color-accent-gold-light) 50%, var(--color-accent-gold) 80%, transparent 100%);
}

.footer-content { max-width: var(--max-width); margin: 0 auto; }
.footer-content p { color: rgba(255, 255, 255, 0.85); font-family: var(--font-body); font-size: 0.95rem; font-style: italic; margin: 0; }

/* RESPONSIVE */
@media (max-width: 768px) {
    .site-header { padding: 1.5rem 1rem; }
    .site-title { font-size: 1.5rem; }
    .site-description { font-size: 0.9rem; }
    
    .main-nav { position: sticky; top: 0; }
    .nav-list { 
        gap: 0.15rem; 
        padding: 0.4rem 0;
        flex-wrap: wrap;
    }
    .nav-list li a { 
        padding: 0.4rem 0.6rem; 
        font-size: 0.7rem;
        letter-spacing: 0.03em;
    }
    
    .main-content { padding: 1.5rem 1rem; }
    .page-content { padding: 1.5rem; border-radius: 6px; }
    .page-content::before { display: none; }
    .cards-grid { grid-template-columns: 1fr; }
    .links-list { grid-template-columns: 1fr; }
    .section-title { font-size: 1.4rem; }
    
    .tema-card a { padding: 1.25rem; }
    .tema-card-title { font-size: 1.15rem; }
}

@media (max-width: 480px) {
    body { font-size: 16px; }
    .site-header { padding: 1.25rem 0.75rem; }
    .site-title { font-size: 1.3rem; }
    .site-description { font-size: 0.85rem; }
    
    .nav-container { padding: 0 0.5rem; }
    .nav-list { 
        gap: 0.1rem;
        padding: 0.3rem 0;
    }
    .nav-list li a { 
        padding: 0.35rem 0.5rem; 
        font-size: 0.65rem;
        letter-spacing: 0.02em;
    }
    
    .main-content { padding: 1rem 0.5rem; }
    .page-content { padding: 1rem; border-radius: 4px; }
    .section-title { font-size: 1.2rem; margin-bottom: 1.5rem; }
    .section-title::after { display: none; }
    
    .content-text { font-size: 0.95rem; }
    .content-text h3 { font-size: 1.05rem; }
    
    .tema-group-title { font-size: 0.9rem; padding: 0.7rem 0.9rem; }
    .tema-item { padding: 0.6rem 0.5rem; font-size: 0.9rem; }
    
    .highlight-box { padding: 1rem 1.25rem; }
    
    .about-info h3 { font-size: 1.4rem; }
    .linkedin-badge { margin-top: 1.5rem; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}