/* Base styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --background-color: #f8f9fa;
    --text-color: #2c3e50;
    --border-color: #e9ecef;
    --hover-color: #e3f2fd;
}

* {
    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: var(--background-color);
}

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

header h1 {
    margin-bottom: 1rem;
    font-size: 2.5rem;
}

nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

nav a {
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

nav a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Main content styles */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

section {
    margin-bottom: 3rem;
    background-color: white;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

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

/* Table styles */
.table-wrapper {
    overflow-x: auto;
    margin-bottom: 2rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
    background-color: white;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
}

tr:hover {
    background-color: var(--hover-color);
}

/* Visualization container styles */
.viz-container {
    margin-bottom: 3rem;
    padding: 1rem;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

canvas {
    width: 100% !important;
    height: 400px !important;
    margin: 1rem 0;
}

/* Methodology section styles */
#methodology ul {
    list-style-type: none;
    margin: 1rem 0;
}

#methodology li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

#methodology li:last-child {
    border-bottom: none;
}

/* Footer styles */
footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
}

footer p {
    margin: 0.5rem 0;
}

/* Responsive design */
@media (max-width: 768px) {
    header {
        padding: 1rem;
    }

    header h1 {
        font-size: 2rem;
    }

    nav {
        flex-direction: column;
        gap: 0.5rem;
    }

    main {
        padding: 1rem;
    }

    section {
        padding: 1rem;
    }

    th, td {
        padding: 0.5rem;
    }

    canvas {
        height: 300px !important;
    }
}