/* Base styles */
:root {
    --primary-color: #4a6baf;
    --secondary-color: #344d85;
    --accent-color: #5b81ce;
    --light-gray: #f5f7fa;
    --dark-gray: #344054;
    --text-color: #333;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f9fafb;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header styles */
header {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto;
}

/* Navigation */
nav {
    background-color: var(--secondary-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav ul {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    list-style: none;
}

nav li {
    margin: 0 1rem;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    transition: all 0.3s ease;
}

nav a:hover {
    color: #c1d3fe;
}

/* Main content */
main {
    padding: 2rem 0;
}

section {
    margin-bottom: 3rem;
}

h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid var(--accent-color);
    display: inline-block;
}

h3 {
    font-size: 1.5rem;
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

h4 {
    font-size: 1.2rem;
    color: var(--dark-gray);
    margin-bottom: 0.5rem;
}

p {
    margin-bottom: 1rem;
}

ul, ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

/* Paper section styles */
.paper-section {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* Column layout */
.column {
    flex: 1;
    min-width: 250px;
    padding: 0 1rem;
}

.paper-section {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}

/* Images */
.image-container {
    margin-bottom: 1.5rem;
    text-align: center;
}

.image-container img {
    max-width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.full-width img {
    width: 100%;
}

.caption {
    font-size: 0.9rem;
    color: var(--dark-gray);
    margin-top: 0.75rem;
    font-style: italic;
}

/* Insights section */
.insight-item {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.insight-icon {
    font-size: 2rem;
    color: var(--accent-color);
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--light-gray);
    border-radius: 50%;
}

.insight-content {
    flex: 1;
}

/* Components section */
.component-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.component {
    background-color: var(--light-gray);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--accent-color);
}

/* Footer */
footer {
    background-color: var(--dark-gray);
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-top: 3rem;
}

footer p {
    margin-bottom: 0.5rem;
}

.small {
    font-size: 0.8rem;
    opacity: 0.8;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .paper-section {
        flex-direction: column;
    }
    
    .column {
        width: 100%;
        padding: 0;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    nav li {
        margin: 0.5rem 0;
    }
    
    .insight-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .insight-icon {
        margin-bottom: 1rem;
    }
}