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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-bg: #ecf0f1;
    --text-color: #2c3e50;
    --border-color: #bdc3c7;
    --success-color: #27ae60;
}

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

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-color);
}

/* Header and Navigation */
header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 1rem 1.5rem;
    color: white;
    transition: all 0.3s ease;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
}

/* Dropdown menu */
.dropdown {
    position: relative;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: var(--primary-color);
    min-width: 200px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
    z-index: 1;
    top: 100%;
    left: 0;
    border-radius: 0 0 5px 5px;
}

.dropdown-content a {
    color: white;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    display: block;
    transition: all 0.3s ease;
}

.dropdown-content a:hover {
    background-color: var(--secondary-color);
    color: white;
    padding-left: 2rem;
}

.dropdown:hover .dropdown-content {
    display: block;
}

/* Main Content */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
    min-height: calc(100vh - 200px);
}

.page-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    border-bottom: 3px solid var(--secondary-color);
    padding-bottom: 0.5rem;
}

.page-description {
    font-size: 1.1rem;
    color: #555;
    margin-bottom: 2rem;
    line-height: 1.8;
}

/* Statistics Section */
.stats-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
    align-items: start;
}

.stat-chart {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.stat-chart h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.chart-canvas {
    max-width: 100%;
    height: auto;
}

/* Table Section */
.table-container {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
    overflow-x: auto;
}

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

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

table thead {
    background-color: var(--secondary-color);
    color: white;
}

table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
}

table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

table tbody tr:hover {
    background-color: var(--light-bg);
}

table tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}

/* Home Page Specific */
.home-hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 3rem 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.home-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.home-hero p {
    font-size: 1.1rem;
    line-height: 1.8;
}

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

.figure-section h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.figure-image {
    max-width: 100%;
    height: auto;
    margin: 1.5rem 0;
    border-radius: 5px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.figure-caption {
    font-size: 0.95rem;
    color: #555;
    font-style: italic;
    line-height: 1.8;
    margin-top: 1rem;
    padding: 1rem;
    background-color: var(--light-bg);
    border-left: 4px solid var(--secondary-color);
}

/* Framework Diagram */
.framework-diagram {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.framework-card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
    border-top: 4px solid var(--secondary-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.framework-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.framework-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.framework-card p {
    color: #555;
    font-size: 0.95rem;
}

.framework-card a {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.75rem 1.5rem;
    background-color: var(--secondary-color);
    color: white;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.framework-card a:hover {
    background-color: var(--accent-color);
    color: white;
}

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

footer p {
    margin: 0.5rem 0;
}

footer a {
    color: #ecf0f1;
}

footer a:hover {
    color: var(--secondary-color);
}

/* More Page */
.info-section {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.info-section h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 0.5rem;
}

.contact-item {
    margin: 1rem 0;
    padding: 1rem;
    background-color: var(--light-bg);
    border-left: 4px solid var(--secondary-color);
    border-radius: 3px;
}

.contact-item strong {
    color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        gap: 0;
    }

    .nav-link {
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .dropdown-content {
        position: static;
        display: none;
        background-color: rgba(0, 0, 0, 0.1);
    }

    .dropdown:hover .dropdown-content {
        display: block;
    }

    .stats-container {
        grid-template-columns: 1fr;
    }

    .page-title {
        font-size: 1.8rem;
    }

    .home-hero h1 {
        font-size: 1.8rem;
    }

    main {
        padding: 0 1rem;
    }

    table {
        font-size: 0.85rem;
    }

    table th,
    table td {
        padding: 0.5rem;
    }

    .framework-diagram {
        grid-template-columns: 1fr;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-2 {
    margin-top: 2rem;
}

.mb-2 {
    margin-bottom: 2rem;
}

.py-2 {
    padding: 2rem 0;
}

/* Links styling */
.superlink {
    color: var(--secondary-color);
    font-weight: 600;
    text-decoration: underline;
}

.superlink:hover {
    color: var(--accent-color);
}