/* ===== CSS Variables & Reset ===== */
:root {
    /* Primary Colors */
    --blue: #2563eb;
    --purple: #7c3aed;
    --navy: #0f172a;
    --dark: #0b1120;
    --white: #ffffff;
    --gray-light: #f8fafc;
    --gray: #e2e8f0;
    --gray-text: #64748b;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #2563eb, #7c3aed);
    --gradient-subtle: linear-gradient(145deg, #f8fafc, #e2e8f0);
    --gradient-glow: linear-gradient(145deg, rgba(37,99,235,0.1), rgba(124,58,237,0.1));
    
    /* Spacing */
    --section-spacing: 5rem;
    --container-padding: 1.5rem;
    --radius-base: 1rem;
    --radius-sm: 0.5rem;
    
    /* Shadows */
    --shadow-sm: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-md: 0 10px 25px -5px rgba(0,0,0,0.1);
    --shadow-lg: 0 20px 40px -12px rgba(0,0,0,0.2);
    --shadow-glow: 0 0 20px rgba(37,99,235,0.3);
    
    /* Transitions */
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--dark);
    line-height: 1.6;
    background: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ===== Typography ===== */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
}

.text-blue {
    color: var(--blue);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 800;
}

/* ===== Navigation ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray);
    padding: 1rem 0;
    transition: var(--transition-base);
}

.navbar:hover {
    border-bottom-color: var(--blue);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    text-decoration: none;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    transition: var(--transition-base);
}

.logo:hover {
    transform: scale(1.02);
    filter: drop-shadow(0 0 10px rgba(37,99,235,0.5));
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: var(--transition-base);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-base);
}

.nav-links a:hover {
    color: var(--blue);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.search-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition-base);
    color: var(--dark);
}

.search-btn:hover {
    background: var(--gray-light);
    color: var(--blue);
    transform: rotate(90deg);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

.mobile-menu-btn .bar {
    width: 100%;
    height: 3px;
    background: var(--dark);
    border-radius: 3px;
    transition: var(--transition-base);
}

.mobile-menu-btn.active .bar:nth-child(1) {
    transform: translateY(10px) rotate(45deg);
}

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

.mobile-menu-btn.active .bar:nth-child(3) {
    transform: translateY(-10px) rotate(-45deg);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    padding: 6rem 0;
    background: linear-gradient(135deg, #0b1120 0%, #1e293b 100%);
    color: white;
    overflow: hidden;
}

.hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(37,99,235,0.1) 0%, transparent 30%),
        radial-gradient(circle at 80% 80%, rgba(124,58,237,0.1) 0%, transparent 30%);
    animation: scientificPulse 8s ease-in-out infinite;
}

@keyframes scientificPulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    animation: slideUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 2.5rem;
    animation: slideUp 0.8s 0.2s ease-out both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: slideUp 0.8s 0.4s ease-out both;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-smooth);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(37,99,235,0.3);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 25px rgba(37,99,235,0.5);
    border-color: white;
}

.btn-outline {
    background: transparent;
    color: white;
    border-color: rgba(255,255,255,0.5);
}

.btn-outline:hover {
    background: white;
    color: var(--blue);
    border-color: white;
    transform: translateY(-3px);
}

/* ===== Trust Badges ===== */
.trust-badges {
    padding: 3rem 0;
    background: var(--white);
}

.trust-text {
    text-align: center;
    color: var(--gray-text);
    margin-bottom: 2rem;
    font-weight: 500;
}

.badges-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
    opacity: 0.7;
    transition: var(--transition-base);
}

.badges-grid:hover {
    opacity: 1;
}

.badge-img {
    height: 30px;
    width: auto;
    filter: grayscale(1);
    transition: var(--transition-base);
}

.badge-img:hover {
    filter: grayscale(0);
    transform: scale(1.1);
}

/* ===== Stats Section ===== */
.stats-section {
    padding: 4rem 0;
    background: var(--gradient-subtle);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 2rem;
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(5px);
    border-radius: var(--radius-base);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    border: 1px solid transparent;
}

.stat-item:hover {
    transform: translateY(-5px);
    border-color: var(--blue);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.2;
}

.stat-label {
    color: var(--gray-text);
    font-weight: 500;
}

/* ===== Categories ===== */
.categories {
    padding: var(--section-spacing) 0;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.category-card {
    padding: 2rem;
    background: var(--white);
    border-radius: var(--radius-base);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition-smooth);
    border: 1px solid var(--gray);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-glow);
    opacity: 0;
    transition: var(--transition-base);
    z-index: 1;
}

.category-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--blue);
    box-shadow: var(--shadow-lg);
}

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

.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 2;
    transition: var(--transition-base);
}

.category-card:hover .category-icon {
    transform: scale(1.1) rotate(5deg);
}

.category-card h3 {
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 2;
}

.category-card p {
    color: var(--gray-text);
    position: relative;
    z-index: 2;
}

/* ===== Blog Cards ===== */
.latest-posts {
    padding: var(--section-spacing) 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.view-all {
    text-decoration: none;
    color: var(--blue);
    font-weight: 600;
    transition: var(--transition-base);
    position: relative;
}

.view-all::after {
    content: '→';
    margin-left: 0.3rem;
    transition: var(--transition-base);
}

.view-all:hover {
    color: var(--purple);
}

.view-all:hover::after {
    transform: translateX(5px);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.blog-card {
    background: var(--white);
    border-radius: var(--radius-base);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    border: 1px solid var(--gray);
}

.blog-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: var(--blue);
}

.blog-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.blog-card:hover .blog-image img {
    transform: scale(1.1);
}

.post-category {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: var(--gradient-primary);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    z-index: 2;
    box-shadow: var(--shadow-sm);
}

.blog-content {
    padding: 1.5rem;
}

.blog-title {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.blog-title a {
    text-decoration: none;
    color: var(--dark);
    transition: var(--transition-base);
}

.blog-title a:hover {
    color: var(--blue);
}

.blog-excerpt {
    color: var(--gray-text);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.blog-meta {
    display: flex;
    gap: 1rem;
    color: var(--gray-text);
    font-size: 0.85rem;
}

/* ===== Featured Review ===== */
.featured-review {
    padding: var(--section-spacing) 0;
    background: var(--gradient-glow);
}

.featured-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.featured-content {
    animation: slideRight 0.8s ease-out;
}

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

.featured-badge {
    background: var(--gradient-primary);
    color: white;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    display: inline-block;
    margin-bottom: 1rem;
}

.featured-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.featured-desc {
    color: var(--gray-text);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.featured-rating {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.rating-stars {
    color: #fbbf24;
    font-size: 1.5rem;
    letter-spacing: 2px;
}

.rating-score {
    font-weight: 600;
    color: var(--blue);
}

.featured-pros {
    list-style: none;
    margin-bottom: 2rem;
}

.featured-pros li {
    margin-bottom: 0.5rem;
    color: var(--dark);
    font-weight: 500;
}

.featured-buttons {
    display: flex;
    gap: 1rem;
}

.featured-image {
    border-radius: var(--radius-base);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    animation: slideLeft 0.8s ease-out;
}

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

.featured-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition-smooth);
}

.featured-image:hover img {
    transform: scale(1.02);
}

/* ===== Testimonials ===== */
.testimonials {
    padding: var(--section-spacing) 0;
}

.testimonial-card {
    transition: var(--transition-smooth);
}

.testimonial-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--blue);
}

/* ===== Newsletter ===== */
.newsletter {
    padding: var(--section-spacing) 0;
    background: var(--gradient-primary);
    color: white;
}

.newsletter-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.newsletter-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.newsletter-content p {
    margin-bottom: 2rem;
    opacity: 0.9;
}

.newsletter-form {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.newsletter-input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    outline: none;
    transition: var(--transition-base);
}

.newsletter-input:focus {
    box-shadow: 0 0 0 3px rgba(255,255,255,0.5);
}

.newsletter-btn {
    padding: 1rem 2rem;
    background: var(--dark);
    color: white;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
}

.newsletter-btn:hover {
    background: var(--navy);
    transform: scale(1.02);
    box-shadow: var(--shadow-glow);
}

.newsletter-note {
    font-size: 0.85rem;
    opacity: 0.7;
}

/* ===== Footer ===== */
.footer {
    padding: 4rem 0 2rem;
    background: var(--dark);
    color: white;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.footer-col p {
    color: var(--gray-text);
    margin-bottom: 1.5rem;
}

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

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: white;
    transition: var(--transition-base);
}

.social-link:hover {
    background: var(--blue);
    transform: translateY(-3px) rotate(360deg);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    text-decoration: none;
    color: var(--gray-text);
    transition: var(--transition-base);
}

.footer-links a:hover {
    color: var(--blue);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: var(--gray-text);
    font-size: 0.9rem;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.8rem;
    }
    
    .blog-grid,
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        height: calc(100vh - 80px);
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2rem;
        transform: translateX(100%);
        transition: var(--transition-smooth);
        z-index: 999;
    }
    
    .nav-links.active {
        transform: translateX(0);
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .featured-grid {
        grid-template-columns: 1fr;
    }
    
    .featured-image {
        order: -1;
    }
    
    .blog-grid,
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .testimonials > div > div {
        grid-template-columns: 1fr !important;
    }
    
    /* New sections adjustments */
    [style*="grid-template-columns: repeat(3, 1fr)"] {
        grid-template-columns: 1fr !important;
    }
    
    [style*="grid-template-columns: repeat(2, 1fr)"] {
        grid-template-columns: 1fr !important;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .badges-grid {
        gap: 1.5rem;
    }
    
    .badge-img {
        height: 25px;
    }
}

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

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.blog-card, .category-card, .stat-item {
    animation: float 6s ease-in-out infinite;
    animation-play-state: paused;
}

.blog-card:hover, .category-card:hover, .stat-item:hover {
    animation-play-state: running;
}

/* Scientific subtle glow animation for cards */
@keyframes glowPulse {
    0% {
        box-shadow: 0 0 5px rgba(37,99,235,0.2);
    }
    50% {
        box-shadow: 0 0 20px rgba(37,99,235,0.4);
    }
    100% {
        box-shadow: 0 0 5px rgba(37,99,235,0.2);
    }
}

.category-card, .blog-card, .testimonial-card {
    animation: glowPulse 3s ease-in-out infinite;
}

/* Smooth scroll behavior already set on html */