/* ===================================
   Global Styles & Variables
   =================================== */
:root {
    --primary-bg: #0a1628;
    --secondary-bg: #0f1f3a;
    --accent-color: #00d9ff;
    --accent-hover: #00b8d4;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #718096;
    --border-color: #1e3a5f;
    --card-bg: #132642;
    --card-hover: #1a3654;
}

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

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===================================
   Header & Navigation
   =================================== */
.header {
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 0;
}

.logo a {
    text-decoration: none;
    display: flex;
    flex-direction: column;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-color);
    letter-spacing: -0.5px;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-list a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

.nav-list a:hover,
.nav-list a.active {
    color: var(--accent-color);
}

.nav-list a:hover::after,
.nav-list a.active::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--accent-color);
    transition: all 0.3s ease;
}

/* ===================================
   Hero Section
   =================================== */
.hero-section {
    position: relative;
    padding: 180px 0 120px;
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
    overflow: hidden;
}

.hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(30deg, rgba(0, 217, 255, 0.05) 12%, transparent 12.5%, transparent 87%, rgba(0, 217, 255, 0.05) 87.5%, rgba(0, 217, 255, 0.05)),
        linear-gradient(150deg, rgba(0, 217, 255, 0.05) 12%, transparent 12.5%, transparent 87%, rgba(0, 217, 255, 0.05) 87.5%, rgba(0, 217, 255, 0.05)),
        linear-gradient(30deg, rgba(0, 217, 255, 0.05) 12%, transparent 12.5%, transparent 87%, rgba(0, 217, 255, 0.05) 87.5%, rgba(0, 217, 255, 0.05)),
        linear-gradient(150deg, rgba(0, 217, 255, 0.05) 12%, transparent 12.5%, transparent 87%, rgba(0, 217, 255, 0.05) 87.5%, rgba(0, 217, 255, 0.05));
    background-size: 80px 140px;
    background-position: 0 0, 0 0, 40px 70px, 40px 70px;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 400;
    line-height: 1.8;
}

/* ===================================
   Filter Section
   =================================== */
.filter-section {
    padding: 40px 0;
    background: var(--secondary-bg);
    border-bottom: 1px solid var(--border-color);
}

.filter-wrapper {
    display: flex;
    gap: 2rem;
    align-items: center;
    flex-wrap: wrap;
}

.search-bar {
    flex: 1;
    min-width: 300px;
    position: relative;
}

.search-bar i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-bar input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.1);
}

.category-filter {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-btn:hover {
    background: var(--card-hover);
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: var(--primary-bg);
}

.filter-btn i {
    font-size: 0.85rem;
}

/* ===================================
   Blog Section
   =================================== */
.blog-section {
    padding: 80px 0 120px;
    min-height: 600px;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.blog-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
    animation: fadeIn 0.5s ease;
}

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

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 217, 255, 0.15);
    border-color: var(--accent-color);
}

.blog-card-image {
    width: 100%;
    height: 240px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.blog-card:hover .blog-card-image {
    transform: scale(1.05);
}

.blog-card-content {
    padding: 25px;
}

.blog-card-meta {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.blog-category {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid var(--accent-color);
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.blog-date {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.blog-date i {
    font-size: 0.75rem;
}

.blog-card-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
    line-height: 1.4;
}

.blog-card-excerpt {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.blog-read-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: gap 0.3s ease;
}

.blog-card:hover .blog-read-more {
    gap: 12px;
}

.blog-read-more i {
    transition: transform 0.3s ease;
}

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

/* No Results */
.no-results {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-secondary);
}

.no-results i {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.no-results h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.no-results p {
    font-size: 1rem;
}

/* ===================================
   Newsletter Section
   =================================== */
.newsletter-section {
    background: linear-gradient(135deg, var(--secondary-bg) 0%, var(--card-bg) 100%);
    padding: 60px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.newsletter-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
}

.newsletter-text h2 {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.newsletter-text p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.newsletter-form {
    display: flex;
    gap: 10px;
    flex: 1;
    max-width: 500px;
}

.newsletter-form input {
    flex: 1;
    padding: 14px 18px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.1);
}

.btn-primary {
    padding: 14px 30px;
    background: var(--accent-color);
    border: none;
    border-radius: 8px;
    color: var(--primary-bg);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 217, 255, 0.3);
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--secondary-bg);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--accent-color);
}

.footer-column h4 {
    font-size: 1rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.footer-column p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 10px;
}

.footer-column ul li a,
.footer-column ul li {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-column ul li a:hover {
    color: var(--accent-color);
}

.footer-column ul li i {
    color: var(--accent-color);
    font-size: 0.85rem;
}

.footer-badges {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid var(--accent-color);
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--accent-color);
    width: fit-content;
}

.badge i {
    font-size: 0.9rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .blog-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    }
    
    .filter-wrapper {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-bar {
        width: 100%;
    }
    
    .category-filter {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 22, 40, 0.98);
        backdrop-filter: blur(10px);
        border-top: 1px solid var(--border-color);
    }
    
    .nav.active {
        display: block;
    }
    
    .nav-list {
        flex-direction: column;
        padding: 20px;
        gap: 0;
    }
    
    .nav-list li {
        width: 100%;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-list a {
        display: block;
        padding: 15px 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero-section {
        padding: 140px 0 80px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .newsletter-content {
        flex-direction: column;
        text-align: center;
    }
    
    .newsletter-form {
        flex-direction: column;
        width: 100%;
        max-width: 100%;
    }
    
    .newsletter-form input,
    .btn-primary {
        width: 100%;
    }
    
    .filter-btn {
        flex: 1;
        justify-content: center;
        min-width: 120px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .blog-card-title {
        font-size: 1.2rem;
    }
    
    .blog-card-content {
        padding: 20px;
    }
    
    .category-filter {
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 8px 12px;
        font-size: 0.85rem;
        min-width: auto;
    }
}