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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* Header */
header {
    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

nav h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

nav a:hover {
    opacity: 0.8;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero .subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* Content Sections */
.content-section {
    padding: 4rem 0;
    background: white;
    margin: 2rem 0;
    border-radius: 10px;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

.content-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: #2c3e50;
    text-align: center;
}

.content-section p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #555;
}

/* Architecture Overview */
.architecture-overview {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
    margin: 2rem 0;
}

.architecture-overview h3 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    text-align: center;
}

.concepts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.concept-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.concept-card:hover {
    transform: translateY(-5px);
}

.concept-card h4 {
    color: #3498db;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

/* Data Pool Features */
.data-pool-features h3 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    text-align: center;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.feature-item {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
}

.feature-item h4 {
    color: #3498db;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.data-pool-advantages,
.data-pool-limitations,
.data-lake-advantages,
.data-lake-challenges {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
    margin: 2rem 0;
}

.data-pool-advantages h3,
.data-pool-limitations h3,
.data-lake-advantages h3,
.data-lake-challenges h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.data-pool-advantages ul,
.data-pool-limitations ul,
.data-lake-advantages ul,
.data-lake-challenges ul {
    list-style: none;
}

.data-pool-advantages li,
.data-pool-limitations li,
.data-lake-advantages li,
.data-lake-challenges li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #e9ecef;
}

.data-pool-advantages li:last-child,
.data-pool-limitations li:last-child,
.data-lake-advantages li:last-child,
.data-lake-challenges li:last-child {
    border-bottom: none;
}

/* Data Lake Features */
.data-lake-features h3 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    text-align: center;
}

/* Comparison Table */
.comparison-table {
    margin: 2rem 0;
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.comparison-table th {
    background: #3498db;
    color: white;
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

.comparison-table td {
    padding: 1rem;
    border-bottom: 1px solid #e9ecef;
}

.comparison-table tr:nth-child(even) {
    background: #f8f9fa;
}

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

/* Use Cases */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.use-case-category {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
}

.use-case-category h3 {
    color: #3498db;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.use-case-category ul {
    list-style: none;
}

.use-case-category li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #e9ecef;
}

.use-case-category li:last-child {
    border-bottom: none;
}

/* Hybrid Approach */
.hybrid-approach {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
    margin: 2rem 0;
}

.hybrid-approach h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.hybrid-benefits {
    margin-top: 1.5rem;
}

.hybrid-benefits h4 {
    color: #3498db;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.hybrid-benefits ul {
    list-style: none;
}

.hybrid-benefits li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #e9ecef;
}

.hybrid-benefits li:last-child {
    border-bottom: none;
}

/* Implementation Factors */
.implementation-factors {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.factor {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
}

.factor h3 {
    color: #3498db;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

/* Footer */
footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .content-section h2 {
        font-size: 2rem;
    }
    
    nav ul {
        gap: 1rem;
    }
    
    .concepts-grid,
    .features-grid,
    .use-cases-grid,
    .implementation-factors {
        grid-template-columns: 1fr;
    }
    
    .comparison-table {
        font-size: 0.9rem;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 0.5rem;
    }
}