/* ===========================================
   BLOG SENIOR PREMIUM - CSS FRAMEWORK
   Psicología de la Creencia - Luis Virrueta
   Mobile-First | UX Optimized | Modern Design
   =========================================== */

:root {
    /* Paleta de Colores Coherente */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    
    /* Colores Semánticos */
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --text-inverse: #ffffff;
    
    /* Backgrounds */
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-tertiary: #edf2f7;
    --bg-glass: rgba(255, 255, 255, 0.85);
    --bg-overlay: rgba(0, 0, 0, 0.6);
    
    /* Typography Scale */
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;   /* 36px */
    --font-size-5xl: 3rem;      /* 48px */
    
    /* Spacing System */
    --space-xs: 0.25rem;   /* 4px */
    --space-sm: 0.5rem;    /* 8px */
    --space-md: 1rem;      /* 16px */
    --space-lg: 1.5rem;    /* 24px */
    --space-xl: 2rem;      /* 32px */
    --space-2xl: 2.5rem;   /* 40px */
    --space-3xl: 3rem;     /* 48px */
    
    /* Border Radius */
    --radius-sm: 0.375rem;  /* 6px */
    --radius-md: 0.5rem;    /* 8px */
    --radius-lg: 0.75rem;   /* 12px */
    --radius-xl: 1rem;      /* 16px */
    --radius-full: 50%;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-premium: 0 25px 50px -12px rgba(102, 126, 234, 0.25);
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-toast: 1050;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-muted: #a0aec0;
    --bg-primary: #1a202c;
    --bg-secondary: #2d3748;
    --bg-tertiary: #4a5568;
    --bg-glass: rgba(26, 32, 44, 0.85);
}

/* ===============================
   RESET & BASE STYLES
   =============================== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
    color: var(--text-secondary);
}

/* Responsive Typography */
@media (max-width: 768px) {
    h1 { font-size: var(--font-size-3xl); }
    h2 { font-size: var(--font-size-2xl); }
    h3 { font-size: var(--font-size-xl); }
    p { font-size: var(--font-size-base); }
}

/* ===============================
   BLOG CONTAINER SYSTEM
   =============================== */

.blog-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.blog-container--narrow {
    max-width: 800px;
}

.blog-container--article {
    max-width: 720px;
}

/* ===============================
   BLOG HEADER & NAVIGATION
   =============================== */

.blog-header {
    position: sticky;
    top: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: var(--z-sticky);
    transition: all var(--transition-normal);
}

.blog-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
}

.blog-logo {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
}

.blog-menu {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
}

.blog-menu__link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.blog-menu__link:hover {
    color: var(--primary-color);
}

.blog-menu__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: width var(--transition-fast);
}

.blog-menu__link:hover::after {
    width: 100%;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: var(--space-sm);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: all var(--transition-fast);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

@media (max-width: 768px) {
    .blog-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-glass);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--space-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .blog-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
}

/* ===============================
   BLOG GRID & CARDS SYSTEM
   =============================== */

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-xl);
    margin: var(--space-3xl) 0;
}

@media (max-width: 768px) {
    .blog-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
        margin: var(--space-lg) 0;
    }
}

/* Optimización para móviles pequeños */
@media (max-width: 480px) {
    .blog-grid {
        gap: var(--space-sm);
        margin: var(--space-md) 0;
    }
}

/* ===============================
   PREMIUM BLOG CARDS
   =============================== */

.blog-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    position: relative;
    border: 1px solid var(--bg-tertiary);
    height: fit-content;
}

.blog-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-premium);
    border-color: var(--primary-color);
}

.blog-card.featured-article {
    border: 2px solid var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.02) 0%, rgba(118, 75, 162, 0.02) 100%);
}

.blog-card.featured-article::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    z-index: 2;
}

/* Card Image Container */
.card-image-container {
    position: relative;
    width: 100%;
    height: 280px;
    overflow: hidden;
}

.card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.blog-card:hover .card-image {
    transform: scale(1.08);
}

.card-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.placeholder-content {
    text-align: center;
    color: white;
}

.placeholder-content i {
    font-size: 48px;
    margin-bottom: var(--space-sm);
    opacity: 0.9;
}

.placeholder-content span {
    display: block;
    font-size: var(--font-size-lg);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Card Overlay */
.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.8) 0%, transparent 40%, transparent 60%, rgba(0, 0, 0, 0.8) 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 1;
}

.blog-card:hover .card-overlay {
    opacity: 1;
}

/* Card Badges */
.card-badges {
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
    display: flex;
    gap: var(--space-sm);
    z-index: 2;
}

.featured-badge {
    background: var(--warning-color);
    color: white;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.category-badge {
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: white;
}

.category-badge.filosofía { background: var(--primary-color); }
.category-badge.transformación { background: var(--success-color); }
.category-badge.casos { background: var(--info-color); }
.category-badge.técnicas { background: var(--secondary-color); }
.category-badge.investigación { background: var(--warning-color); }

/* Quick Actions */
.card-quick-actions {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    z-index: 2;
}

.quick-action-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.9);
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
}

.quick-action-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

/* Stats Overlay */
.card-stats-overlay {
    position: absolute;
    bottom: var(--space-md);
    right: var(--space-md);
    display: flex;
    gap: var(--space-sm);
    z-index: 2;
}

.stat-item {
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    backdrop-filter: blur(10px);
}

.rating-stat {
    background: var(--warning-color);
}

/* ===============================
   CARD CONTENT SECTION
   =============================== */

.card-content {
    padding: var(--space-xl);
    position: relative;
}

.card-meta-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}

.author-info {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    overflow: hidden;
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-placeholder {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--primary-gradient);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-sm);
}

.author-details {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    margin-bottom: 2px;
}

.publish-date {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.read-time {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--text-muted);
    font-size: var(--font-size-xs);
    background: var(--bg-secondary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
}

.card-title {
    margin: 0 0 var(--space-md) 0;
}

.card-link {
    color: var(--text-primary);
    text-decoration: none;
    font-size: var(--font-size-xl);
    font-weight: 700;
    line-height: 1.3;
    display: block;
    transition: color var(--transition-fast);
}

.card-link:hover {
    color: var(--primary-color);
}

.card-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    /* Fallback for browsers that don't support line-clamp */
    max-height: calc(1.6em * 3);
}

/* Card Tags */
.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
}

.tag {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.tag:hover {
    background: var(--primary-color);
    color: white;
}

.tag-more {
    background: var(--primary-color);
    color: white;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

/* Card Footer */
.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-md);
    border-top: 1px solid var(--bg-tertiary);
}

.card-engagement {
    display: flex;
    gap: var(--space-lg);
}

.engagement-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.engagement-item i {
    font-size: var(--font-size-sm);
}

.read-more-btn {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-lg);
    background: rgba(102, 126, 234, 0.05);
}

.read-more-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateX(4px);
}

.read-more-btn i {
    transition: transform var(--transition-fast);
}

.read-more-btn:hover i {
    transform: translateX(4px);
}

/* ===============================
   RESPONSIVE DESIGN
   =============================== */

/* Mobile Optimizations */
@media (max-width: 768px) {
    .blog-container {
        padding: var(--space-md);
    }
    
    .blog-header h1 {
        font-size: var(--font-size-2xl);
    }
    
    .blog-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .card-image-container {
        height: 200px;
    }
    
    .card-content {
        padding: var(--space-md);
    }
    
    .card-meta-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }
    
    .read-time {
        align-self: flex-end;
    }
    
    .card-footer {
        flex-direction: column;
        gap: var(--space-md);
        align-items: flex-start;
    }
    
    .card-engagement {
        width: 100%;
        justify-content: space-around;
    }
    
    .read-more-btn {
        align-self: flex-end;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .card-image-container {
        height: 160px;
    }
    
    .card-content {
        padding: var(--space-sm) var(--space-md);
    }
    
    .author-info {
        gap: var(--space-sm);
    }
    
    .author-avatar,
    .avatar-placeholder {
        width: 28px;
        height: 28px;
    }
    
    .card-link {
        font-size: var(--font-size-base);
        line-height: 1.3;
        margin-bottom: var(--space-sm);
    }
    
    .card-excerpt {
        font-size: var(--font-size-sm);
        line-height: 1.5;
        margin-bottom: var(--space-md);
        -webkit-line-clamp: 2;
        line-clamp: 2;
    }
    
    .card-tags {
        gap: var(--space-xs);
        margin-bottom: var(--space-sm);
    }
    
    .tag {
        padding: 2px var(--space-sm);
        font-size: 0.7rem;
    }
    
    .card-footer {
        padding-top: var(--space-sm);
        margin-top: var(--space-sm);
    }
}

/* Tablet Adjustments */
@media (min-width: 769px) and (max-width: 1024px) {
    .blog-grid {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    }
}

/* Large Screens */
@media (min-width: 1200px) {
    .blog-container {
        max-width: 1200px;
        padding: var(--space-xl) var(--space-lg);
    }
    
    .blog-grid {
        gap: var(--space-xl);
    }
}

/* ===============================
   LOADING STATES & ANIMATIONS
   =============================== */

.blog-card.loading {
    opacity: 0;
    transform: translateY(20px);
    animation: cardAppear 0.6s ease-out forwards;
}

@keyframes cardAppear {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card-skeleton {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
}

.skeleton-shimmer {
    position: absolute;
    top: 0;
    left: -100%;
    height: 100%;
    width: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* ===============================
   ACCESSIBILITY IMPROVEMENTS
   =============================== */

.blog-card:focus-within {
    box-shadow: 0 0 0 3px var(--primary-color-alpha);
}

.card-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.read-more-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.tag:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 1px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .blog-card {
        border: 2px solid var(--text-primary);
    }
    
    .card-overlay {
        background: rgba(0, 0, 0, 0.8);
    }
    
    .featured-badge {
        border: 2px solid var(--text-primary);
    }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    .blog-card,
    .card-link,
    .read-more-btn,
    .tag,
    .card-image img {
        transition: none;
    }
    
    .blog-card.loading {
        animation: none;
        opacity: 1;
        transform: none;
    }
    
    .skeleton-shimmer {
        animation: none;
    }
}

/* ===============================
   DARK MODE ENHANCEMENTS
   =============================== */

@media (prefers-color-scheme: dark) {
    .blog-card {
        background: rgba(20, 20, 30, 0.8);
        border-color: rgba(255, 255, 255, 0.1);
    }
    
    .card-overlay {
        background: linear-gradient(
            to top,
            rgba(0, 0, 0, 0.9) 0%,
            rgba(0, 0, 0, 0.6) 50%,
            transparent 100%
        );
    }
    
    .featured-badge {
        background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    }
    
    .category-badge.psicologia {
        background: linear-gradient(135deg, #667eea, #764ba2);
    }
    
    .tag {
        background: rgba(255, 255, 255, 0.1);
        color: rgba(255, 255, 255, 0.8);
    }
    
    .tag:hover {
        background: var(--primary-color);
        color: white;
    }
    
    .read-more-btn {
        background: rgba(102, 126, 234, 0.15);
    }
}

/* ===============================
   PRINT STYLES
   =============================== */

@media print {
    .blog-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
        background: white;
    }
    
    .card-overlay,
    .featured-badge,
    .category-badge,
    .quick-actions {
        display: none;
    }
    
    .card-link {
        color: #333;
    }
    
    .read-more-btn {
        display: none;
    }
}

.blog-card__meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.blog-card__category {
    background: var(--primary-gradient);
    color: white;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.blog-card__title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.blog-card__excerpt {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.blog-card__read-more {
    display: inline-flex;
    align-items: center;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    gap: var(--space-sm);
    transition: all var(--transition-fast);
}

.blog-card__read-more:hover {
    gap: var(--space-md);
}

/* ===============================
   SEARCH & FILTERS
   =============================== */

.blog-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    align-items: center;
    justify-content: space-between;
}

.blog-search {
    position: relative;
    flex-grow: 1;
    max-width: 400px;
}

.blog-search__input {
    width: 100%;
    padding: var(--space-md) var(--space-xl) var(--space-md) 3rem;
    border: 2px solid var(--bg-tertiary);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.blog-search__input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.blog-search__icon {
    position: absolute;
    left: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.blog-categories {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.blog-category-btn {
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--bg-tertiary);
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.blog-category-btn:hover,
.blog-category-btn.active {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
}

@media (max-width: 768px) {
    .blog-filters {
        flex-direction: column;
        align-items: stretch;
    }
    
    .blog-search {
        max-width: none;
    }
}

/* ===============================
   FLOATING ACTION BUTTONS
   =============================== */

.floating-actions {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    z-index: var(--z-fixed);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.floating-btn {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: var(--primary-gradient);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
}

.floating-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

.floating-btn--secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 2px solid var(--bg-tertiary);
}

/* ===============================
   LOADING STATES & SKELETONS
   =============================== */

.skeleton {
    background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

.skeleton-card {
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.skeleton-image {
    height: 240px;
}

.skeleton-content {
    padding: var(--space-xl);
}

.skeleton-title {
    height: 24px;
    margin-bottom: var(--space-md);
}

.skeleton-text {
    height: 16px;
    margin-bottom: var(--space-sm);
}

.skeleton-text:last-child {
    width: 70%;
}

@keyframes loading {
    0% { background-position: -200% 0; }
    100% { background-position: calc(200% + 200px) 0; }
}

/* ===============================
   ANIMATIONS & MICRO-INTERACTIONS
   =============================== */

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-slide-up {
    animation: slideInUp 0.6s ease-out;
}

.animate-slide-left {
    animation: slideInLeft 0.6s ease-out;
}

/* ===============================
   UTILITY CLASSES
   =============================== */

.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.bg-gradient {
    background: var(--primary-gradient);
}

.glass-effect {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.shadow-premium {
    box-shadow: var(--shadow-premium);
}

/* Responsive Utilities */
.hidden-mobile {
    display: block;
}

.visible-mobile {
    display: none;
}

@media (max-width: 768px) {
    .hidden-mobile {
        display: none;
    }
    
    .visible-mobile {
        display: block;
    }
}

/* Print Styles */
@media print {
    .floating-actions,
    .blog-header,
    .blog-filters {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
}