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

:root {
    --primary-color: #2563eb;
    --secondary-color: #10b981;
    --dark-color: #1f2937;
    --light-color: #f3f4f6;
    --text-color: #374151;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: #ffffff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.logo i {
    margin-right: 0.5rem;
    font-size: 2rem;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark-color);
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.rating {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.stars {
    color: #fbbf24;
    font-size: 1.25rem;
}

.rating-text {
    font-weight: 600;
}

/* Author Section */
.author-section {
    background: var(--light-color);
    padding: 2rem 0;
}

.author-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.author-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar i {
    font-size: 3rem;
    color: var(--primary-color);
}

.author-details h3 {
    color: var(--dark-color);
    margin-bottom: 0.25rem;
}

.author-details p {
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.social-links {
    display: flex;
    gap: 0.75rem;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 35px;
    height: 35px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    text-decoration: none;
    transition: transform 0.3s, background 0.3s;
}

.social-links a:hover {
    transform: translateY(-3px);
    background: var(--dark-color);
}

.review-date {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-color);
}

/* Overview Section */
.overview {
    padding: 4rem 0;
}

.section-title {
    font-size: 2.5rem;
    color: var(--dark-color);
    margin-bottom: 2rem;
    text-align: center;
}

.overview-content {
    max-width: 800px;
    margin: 0 auto;
}

.lead-text {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.lead-text a {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: border-color 0.3s;
}

.lead-text a:hover {
    border-bottom-color: var(--primary-color);
}

/* Features Section */
.features {
    background: var(--light-color);
    padding: 4rem 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
}

.feature-card h3 {
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

/* Pros and Cons */
.pros-cons {
    padding: 4rem 0;
}

.pros-cons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.pros-card, .cons-card {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.pros-card h3 {
    color: var(--success-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.cons-card h3 {
    color: var(--danger-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.pros-table, .cons-table {
    width: 100%;
}

.pros-table tr, .cons-table tr {
    border-bottom: 1px solid var(--border-color);
}

.pros-table tr:last-child, .cons-table tr:last-child {
    border-bottom: none;
}

.pros-table td, .cons-table td {
    padding: 0.75rem 0;
}

.pros-table td:first-child, .cons-table td:first-child {
    width: 30px;
}

.pros-table i {
    color: var(--success-color);
}

.cons-table i {
    color: var(--danger-color);
}

/* Comparison Section */
.comparison {
    background: var(--light-color);
    padding: 4rem 0;
}

.comparison-table-wrapper {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.comparison-table thead {
    background: var(--dark-color);
    color: white;
}

.comparison-table th, .comparison-table td {
    padding: 1rem;
    text-align: center;
}

.comparison-table tbody tr {
    border-bottom: 1px solid var(--border-color);
}

.comparison-table tbody tr:last-child {
    border-bottom: none;
}

.comparison-table .success {
    color: var(--success-color);
}

.comparison-table .warning {
    color: var(--warning-color);
}

.comparison-table .danger {
    color: var(--danger-color);
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
    color: white;
    padding: 5rem 0;
    text-align: center;
}

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

.cta-content p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.cta-note {
    margin-top: 1.5rem;
    font-size: 0.875rem;
    opacity: 0.8;
}

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

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

.footer-links a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}

.footer-links a:hover {
    opacity: 0.8;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .author-card {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .author-info {
        flex-direction: column;
    }
    
    .pros-cons-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-table {
        font-size: 0.875rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .cta-content h2 {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}