/* ==========================================================================
   Blog & SEO Content Hub Styles (Glassmorphism + Dark Mode)
   ========================================================================== */

:root {
    --blog-accent: #6366f1;
    --blog-accent-glow: rgba(99, 102, 241, 0.25);
    --cat-ai: #10b981;
    --cat-security: #ef4444;
    --cat-marketing: #f59e0b;
    --cat-hr: #ec4899;
    --cat-dev: #8b5cf6;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header & Nav */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: hsla(240, 20%, 8%, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    transition: background 0.3s ease;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo img {
    height: 36px;
    width: auto;
}

.logo-text {
    font-family: 'Outfit', sans-serif;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-light);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
    color: var(--text-light);
}

.nav-cta {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #ffffff;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
    transition: all var(--transition-fast);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

/* Main Container */
.blog-main {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 85px 1.5rem 80px;
}

/* Hero Section */
.blog-hero {
    text-align: center;
    margin-bottom: 3.5rem;
}

.blog-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 1rem;
    border-radius: var(--radius-full);
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: #818cf8;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1.25rem;
}

.blog-title {
    font-family: 'Outfit', sans-serif;
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 800;
    letter-spacing: -1.5px;
    margin-bottom: 1rem;
    line-height: 1.15;
}

.blog-subtitle {
    color: var(--text-muted);
    font-size: 1.15rem;
    max-width: 720px;
    margin: 0 auto 2.5rem;
    line-height: 1.6;
}

/* Controls Bar (Search & Categories) */
.blog-controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.search-box-wrapper {
    max-width: 600px;
    width: 100%;
    margin: 0 auto;
    position: relative;
}

.search-icon {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 0.9rem 1.25rem 0.9rem 3.25rem;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    color: var(--text-light);
    font-size: 1rem;
    outline: none;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.search-input:focus {
    background: rgba(255, 255, 255, 0.07);
    border-color: var(--blog-accent);
    box-shadow: 0 0 0 3px var(--blog-accent-glow);
}

.search-input::placeholder {
    color: rgba(255, 255, 255, 0.35);
}

.categories-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.cat-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    padding: 0.5rem 1.1rem;
    border-radius: var(--radius-full);
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
}

.cat-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-light);
    border-color: rgba(255, 255, 255, 0.2);
}

.cat-btn.active {
    background: var(--blog-accent);
    color: #ffffff;
    border-color: var(--blog-accent);
    box-shadow: 0 4px 15px var(--blog-accent-glow);
}

/* Articles Grid */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2rem;
}

/* Article Card */
.article-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    text-decoration: none;
    color: inherit;
}

.article-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--card-accent, var(--blog-accent)), transparent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.article-card:hover {
    transform: translateY(-6px);
    border-color: var(--card-accent, var(--blog-accent));
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4), 0 0 25px var(--card-glow, var(--blog-accent-glow));
    background: rgba(255, 255, 255, 0.04);
}

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

.card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.card-tag {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-full);
    border: 1px solid currentColor;
}

.card-read-time {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.article-card h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 0.75rem;
    color: var(--text-light);
    transition: color var(--transition-fast);
}

.article-card:hover h2 {
    color: #ffffff;
}

.article-card p {
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.card-read-link {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--card-accent, var(--blog-accent));
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: gap var(--transition-fast);
}

.article-card:hover .card-read-link {
    gap: 0.65rem;
}

/* Category Color Variants */
.article-card[data-cat="ia"] { --card-accent: var(--cat-ai); --card-glow: rgba(16, 185, 129, 0.2); }
.article-card[data-cat="ia"] .card-tag { color: var(--cat-ai); border-color: rgba(16, 185, 129, 0.3); background: rgba(16, 185, 129, 0.08); }

.article-card[data-cat="seguridad"] { --card-accent: var(--cat-security); --card-glow: rgba(239, 68, 68, 0.2); }
.article-card[data-cat="seguridad"] .card-tag { color: var(--cat-security); border-color: rgba(239, 68, 68, 0.3); background: rgba(239, 68, 68, 0.08); }

.article-card[data-cat="marketing"] { --card-accent: var(--cat-marketing); --card-glow: rgba(245, 158, 11, 0.2); }
.article-card[data-cat="marketing"] .card-tag { color: var(--cat-marketing); border-color: rgba(245, 158, 11, 0.3); background: rgba(245, 158, 11, 0.08); }

.article-card[data-cat="rrhh"] { --card-accent: var(--cat-hr); --card-glow: rgba(236, 72, 153, 0.2); }
.article-card[data-cat="rrhh"] .card-tag { color: var(--cat-hr); border-color: rgba(236, 72, 153, 0.3); background: rgba(236, 72, 153, 0.08); }

.article-card[data-cat="desarrollo"] { --card-accent: var(--cat-dev); --card-glow: rgba(139, 92, 246, 0.2); }
.article-card[data-cat="desarrollo"] .card-tag { color: var(--cat-dev); border-color: rgba(139, 92, 246, 0.3); background: rgba(139, 92, 246, 0.08); }

/* Empty State */
.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 1rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.02);
    border: 1px dashed var(--glass-border);
    border-radius: var(--radius-lg);
}

.no-results svg {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.no-results h3 {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

/* Footer */
footer {
    border-top: 1px solid var(--glass-border);
    padding: 3rem 1.5rem 2rem;
    text-align: center;
    background: hsla(240, 20%, 6%, 0.8);
    margin-top: auto;
}

.footer-links {
    margin-bottom: 1.5rem;
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.88rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--text-light);
}

.footer-copy {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.dev-credit {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.dev-credit a {
    color: var(--primary);
    text-decoration: none;
}

@media (max-width: 768px) {
    .blog-main {
        padding-top: 100px;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }

    .categories-filter {
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 0.5rem;
        -webkit-overflow-scrolling: touch;
    }

    .cat-btn {
        white-space: nowrap;
    }
}