/*!
 * Tema Elegant
 * Diseño elegante y minimalista con tipografía refinada
 */

/* ============================================
   Variables CSS para Tema Elegant
   ============================================ */
:root {
    /* Paleta de colores elegante */
    --elegant-primary: #2c3e50;
    --elegant-secondary: #34495e;
    --elegant-accent: #e74c3c;
    --elegant-gold: #f39c12;
    --elegant-silver: #95a5a6;
    --elegant-white: #ffffff;
    --elegant-off-white: #fafafa;
    --elegant-light-gray: #ecf0f1;
    --elegant-dark-gray: #2c3e50;
    --elegant-text: #2c3e50;
    --elegant-text-light: #7f8c8d;
    
    /* Tipografía elegante */
    --elegant-font-primary: 'Playfair Display', 'Georgia', serif;
    --elegant-font-secondary: 'Source Sans Pro', 'Helvetica Neue', sans-serif;
    --elegant-font-mono: 'Source Code Pro', monospace;
    
    /* Espaciado y dimensiones */
    --elegant-border-radius: 8px;
    --elegant-spacing-xs: 0.5rem;
    --elegant-spacing-sm: 1rem;
    --elegant-spacing-md: 1.5rem;
    --elegant-spacing-lg: 2rem;
    --elegant-spacing-xl: 3rem;
    
    /* Sombras elegantes */
    --elegant-shadow-light: 0 2px 8px rgba(44, 62, 80, 0.08);
    --elegant-shadow-medium: 0 4px 16px rgba(44, 62, 80, 0.12);
    --elegant-shadow-heavy: 0 8px 32px rgba(44, 62, 80, 0.16);
    
    /* Transiciones suaves */
    --elegant-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --elegant-transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   Tipografía base refinada
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600;700&family=Source+Sans+Pro:wght@300;400;500;600&family=Source+Code+Pro:wght@400;500&display=swap');

body {
    font-family: var(--elegant-font-secondary);
    font-weight: 400;
    line-height: 1.7;
    color: var(--elegant-text);
    background-color: var(--elegant-off-white);
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.1) 0%, transparent 50%);
    background-attachment: fixed;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--elegant-font-primary);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--elegant-spacing-sm);
    color: var(--elegant-dark-gray);
    letter-spacing: -0.02em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.1rem; }

p {
    margin-bottom: var(--elegant-spacing-sm);
    font-size: 1.05rem;
}

a {
    color: var(--elegant-primary);
    text-decoration: none;
    transition: var(--elegant-transition);
}

a:hover {
    color: var(--elegant-accent);
    text-decoration: none;
}

/* ============================================
   Layout principal elegante
   ============================================ */
.main-content {
    min-height: calc(100vh - 80px);
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.9) 0%, 
        rgba(250, 250, 250, 0.95) 100%);
    backdrop-filter: blur(10px);
    border-radius: var(--elegant-border-radius);
    margin-top: var(--elegant-spacing-md);
    box-shadow: var(--elegant-shadow-medium);
    padding: var(--elegant-spacing-xl);
    position: relative;
    overflow: hidden;
}

.main-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--elegant-gold) 50%, 
        transparent 100%);
}

.container {
    max-width: 1200px;
}

/* ============================================
   Navegación elegante
   ============================================ */
.navbar {
    background: linear-gradient(135deg, 
        var(--elegant-primary) 0%, 
        var(--elegant-secondary) 100%) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--elegant-spacing-sm) 0;
    box-shadow: var(--elegant-shadow-light);
}

.navbar-brand {
    font-family: var(--elegant-font-primary);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--elegant-white) !important;
    letter-spacing: -0.02em;
}

.navbar-brand::after {
    content: '';
    display: block;
    width: 0;
    height: 2px;
    background: var(--elegant-gold);
    transition: var(--elegant-transition);
}

.navbar-brand:hover::after {
    width: 100%;
}

.navbar-nav .nav-link {
    font-family: var(--elegant-font-secondary);
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9) !important;
    padding: var(--elegant-spacing-xs) var(--elegant-spacing-sm);
    margin: 0 0.25rem;
    border-radius: var(--elegant-border-radius);
    transition: var(--elegant-transition);
    position: relative;
}

.navbar-nav .nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--elegant-gold);
    transition: var(--elegant-transition);
    transform: translateX(-50%);
}

.navbar-nav .nav-link:hover {
    color: var(--elegant-white) !important;
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.navbar-nav .nav-link:hover::before {
    width: 80%;
}

/* ============================================
   Hero Section elegante
   ============================================ */
.hero-section {
    background: linear-gradient(135deg, 
        var(--elegant-primary) 0%, 
        var(--elegant-secondary) 50%,
        var(--elegant-accent) 100%);
    border-radius: var(--elegant-border-radius);
    padding: var(--elegant-spacing-xl);
    margin-bottom: var(--elegant-spacing-xl);
    position: relative;
    overflow: hidden;
    box-shadow: var(--elegant-shadow-heavy);
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 2px,
        rgba(255, 255, 255, 0.03) 2px,
        rgba(255, 255, 255, 0.03) 4px
    );
    animation: heroPattern 20s linear infinite;
}

@keyframes heroPattern {
    0% { transform: translateX(-100px) translateY(-100px); }
    100% { transform: translateX(0) translateY(0); }
}

.hero-section > * {
    position: relative;
    z-index: 1;
}

.hero-section h1 {
    color: var(--elegant-white);
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--elegant-spacing-sm);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-section .lead {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.25rem;
    font-weight: 300;
    line-height: 1.6;
}

/* ============================================
   Cards y posts elegantes
   ============================================ */
.card {
    border: none;
    border-radius: var(--elegant-border-radius);
    box-shadow: var(--elegant-shadow-light);
    transition: var(--elegant-transition);
    overflow: hidden;
    background: var(--elegant-white);
    position: relative;
}

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

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, 
        var(--elegant-primary) 0%, 
        var(--elegant-gold) 50%, 
        var(--elegant-accent) 100%);
    opacity: 0;
    transition: var(--elegant-transition);
}

.card:hover::before {
    opacity: 1;
}

.post-card .card-body {
    padding: var(--elegant-spacing-lg);
}

.post-card .card-title {
    font-family: var(--elegant-font-primary);
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--elegant-spacing-sm);
}

.post-card .card-title a {
    color: var(--elegant-dark-gray);
    transition: var(--elegant-transition);
}

.post-card .card-title a:hover {
    color: var(--elegant-accent);
}

.post-card .card-text {
    color: var(--elegant-text-light);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: var(--elegant-spacing-md);
}

/* ============================================
   Metadatos del post
   ============================================ */
.post-meta {
    font-family: var(--elegant-font-secondary);
    font-size: 0.875rem;
    color: var(--elegant-text-light);
    font-weight: 400;
}

.post-meta .badge {
    background: linear-gradient(45deg, 
        var(--elegant-primary) 0%, 
        var(--elegant-secondary) 100%);
    color: var(--elegant-white);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.75rem;
    transition: var(--elegant-transition);
    border: none;
}

.post-meta .badge:hover {
    transform: translateY(-1px);
    box-shadow: var(--elegant-shadow-light);
}

.post-meta a {
    color: var(--elegant-text-light);
    transition: var(--elegant-transition);
}

.post-meta a:hover {
    color: var(--elegant-accent);
}

/* ============================================
   Botones elegantes
   ============================================ */
.btn {
    font-family: var(--elegant-font-secondary);
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    border: none;
    transition: var(--elegant-transition);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(45deg, 
        var(--elegant-primary) 0%, 
        var(--elegant-secondary) 100%);
    color: var(--elegant-white);
}

.btn-outline-primary {
    border: 2px solid var(--elegant-primary);
    color: var(--elegant-primary);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--elegant-primary);
    color: var(--elegant-white);
    transform: translateY(-2px);
    box-shadow: var(--elegant-shadow-medium);
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transition: var(--elegant-transition);
    transform: translate(-50%, -50%);
}

.btn:hover::before {
    width: 300%;
    height: 300%;
}

/* ============================================
   Paginación elegante
   ============================================ */
.pagination .page-link {
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 0.25rem;
    color: var(--elegant-primary);
    background: var(--elegant-white);
    box-shadow: var(--elegant-shadow-light);
    transition: var(--elegant-transition);
}

.pagination .page-link:hover {
    background: var(--elegant-primary);
    color: var(--elegant-white);
    transform: translateY(-2px);
    box-shadow: var(--elegant-shadow-medium);
}

.pagination .page-item.active .page-link {
    background: linear-gradient(45deg, 
        var(--elegant-primary) 0%, 
        var(--elegant-accent) 100%);
    color: var(--elegant-white);
    box-shadow: var(--elegant-shadow-medium);
}

/* ============================================
   Footer elegante
   ============================================ */
footer {
    background: linear-gradient(135deg, 
        var(--elegant-dark-gray) 0%, 
        var(--elegant-secondary) 100%);
    color: rgba(255, 255, 255, 0.9);
    padding: var(--elegant-spacing-xl) 0;
    margin-top: var(--elegant-spacing-xl);
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--elegant-gold) 50%, 
        transparent 100%);
}

footer a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--elegant-transition);
}

footer a:hover {
    color: var(--elegant-gold);
}

/* ============================================
   Responsividad elegante
   ============================================ */
@media (max-width: 991.98px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .main-content {
        padding: var(--elegant-spacing-md);
    }
    
    .post-card .card-body {
        padding: var(--elegant-spacing-md);
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
}

@media (max-width: 575.98px) {
    .hero-section {
        padding: var(--elegant-spacing-lg);
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .main-content {
        margin-top: var(--elegant-spacing-sm);
        padding: var(--elegant-spacing-sm);
    }
}

/* ============================================
   Animaciones elegantes
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.post-card {
    animation: fadeInUp 0.6s ease-out;
}

.post-card:nth-child(odd) {
    animation-delay: 0.1s;
}

.post-card:nth-child(even) {
    animation-delay: 0.2s;
}

/* ============================================
   Efectos especiales
   ============================================ */
.text-gradient {
    background: linear-gradient(45deg, 
        var(--elegant-primary) 0%, 
        var(--elegant-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-elegant {
    box-shadow: var(--elegant-shadow-heavy);
}

.border-elegant {
    border: 1px solid rgba(44, 62, 80, 0.1);
}

/* ============================================
   Búsqueda elegante
   ============================================ */
.search-toggle-container {
    position: relative;
}

.search-form-expanded {
    position: absolute;
    right: 0;
    top: 100%;
    margin-top: 0.5rem;
    background: var(--elegant-white);
    border-radius: var(--elegant-border-radius);
    box-shadow: var(--elegant-shadow-medium);
    padding: var(--elegant-spacing-sm);
    min-width: 300px;
    z-index: 1000;
}

@media (max-width: 991.98px) {
    .search-form-expanded {
        left: 0;
    }
}

.search-form-expanded .form-control {
    border: 1px solid var(--elegant-light-gray);
    border-radius: 25px;
    padding: 0.75rem 1rem;
    transition: var(--elegant-transition);
}

.search-form-expanded .form-control:focus {
    border-color: var(--elegant-primary);
    box-shadow: 0 0 0 0.2rem rgba(44, 62, 80, 0.1);
}

/* ============================================
   Tabla de contenidos elegante
   ============================================ */
#table-of-contents {
    background: var(--elegant-white);
    border-radius: var(--elegant-border-radius);
    padding: var(--elegant-spacing-md);
    box-shadow: var(--elegant-shadow-light);
    border-left: 4px solid var(--elegant-gold);
}

#table-of-contents a {
    color: var(--elegant-text-light);
    padding: 0.25rem 0;
    display: block;
    transition: var(--elegant-transition);
    border-bottom: 1px solid transparent;
}

#table-of-contents a:hover {
    color: var(--elegant-accent);
    padding-left: 0.5rem;
    border-bottom-color: var(--elegant-light-gray);
} 

.bi-arrow-up::before { 
    position: relative;
    left: -5px;
}

/* ============================================
   Videos responsivos de YouTube
   ============================================ */
.video-responsive {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    max-width: 100%;
    margin: var(--elegant-spacing-md) 0;
    border-radius: var(--elegant-border-radius);
    box-shadow: var(--elegant-shadow-medium);
    background: var(--elegant-white);
    border: 1px solid var(--elegant-light-gray);
}

.video-responsive iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: var(--elegant-border-radius);
}

.video-title {
    margin-top: var(--elegant-spacing-sm);
    font-weight: 600;
    color: var(--elegant-primary);
    font-size: 1.1rem;
    text-align: center;
    line-height: 1.4;
    padding: 0 var(--elegant-spacing-sm);
}