/* Deliberation Knowledge Graph - Main Stylesheet */

/* Base Styles */
:root {
    --primary-color: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary-color: #0f172a;
    --secondary-light: #1e293b;
    --accent-color: #f97316;
    --accent-light: #fb923c;
    --light-color: #f8fafc;
    --dark-color: #0f172a;
    --text-color: #334155;
    --text-light: #64748b;
    --link-color: #6366f1;
    --link-hover-color: #4f46e5;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;
}

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Poppins:wght@400;500;600;700&display=swap');

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

body {
    font-family: var(--font-body);
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--light-color);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

a:hover {
    color: var(--link-hover-color);
    text-decoration: underline;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    margin-bottom: 1.2rem;
    color: var(--secondary-color);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

p {
    margin-bottom: 1.5rem;
}

ul, ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

img {
    max-width: 100%;
    height: auto;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 3rem 0;
    box-shadow: var(--box-shadow);
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('data:image/svg+xml;charset=utf8,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"%3E%3Cpath fill="%23ffffff" fill-opacity="0.05" d="M0,192L48,197.3C96,203,192,213,288,229.3C384,245,480,267,576,250.7C672,235,768,181,864,181.3C960,181,1056,235,1152,234.7C1248,235,1344,181,1392,154.7L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"%3E%3C/path%3E%3C/svg%3E');
    background-size: cover;
    background-position: center;
    opacity: 0.1;
    z-index: 0;
}

header .container {
    position: relative;
    z-index: 1;
}

header h1 {
    color: white;
    margin-bottom: 0.5rem;
    font-size: 2.5rem;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

header .subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.3rem;
    margin-bottom: 2rem;
    max-width: 700px;
}

nav {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 0.5rem;
    backdrop-filter: blur(5px);
    display: inline-block;
}

nav ul {
    display: flex;
    list-style: none;
    padding: 0;
    margin: 0;
    flex-wrap: wrap;
}

nav ul li {
    margin: 0.25rem;
}

nav ul li a {
    color: white;
    font-weight: 500;
    padding: 0.6rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: block;
}

nav ul li a:hover {
    text-decoration: none;
    background-color: rgba(255, 255, 255, 0.2);
}

/* Sections */
.section {
    padding: 5rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
}

.section:nth-child(even) {
    background-color: #f1f5f9;
}

.section:last-of-type {
    border-bottom: none;
}

.section h2 {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1.2rem;
    font-size: 2.2rem;
    color: var(--secondary-color);
}

.section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: 2px;
}

/* Dataset Grid */
.dataset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-top: 2.5rem;
}

.dataset-card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.dataset-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
}

.dataset-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.4rem;
    position: relative;
    padding-left: 1.5rem;
}

.dataset-card h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5rem;
    width: 8px;
    height: 8px;
    background-color: var(--primary-color);
    border-radius: 50%;
}

.dataset-card p {
    margin-bottom: 1.5rem;
    color: var(--text-light);
    flex-grow: 1;
}

.dataset-card .source {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
}

.dataset-card .source svg {
    margin-right: 0.5rem;
    width: 16px;
    height: 16px;
}

.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.7rem 1.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    text-align: center;
    font-weight: 500;
    letter-spacing: 0.02em;
    box-shadow: 0 2px 4px rgba(99, 102, 241, 0.3);
}

.btn:hover {
    background-color: var(--primary-dark);
    color: white;
    text-decoration: none;
    box-shadow: 0 4px 8px rgba(99, 102, 241, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: white;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    box-shadow: none;
}

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

/* Ontology Categories */
.ontology-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin: 2.5rem 0;
}

.ontology-category {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    border: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.ontology-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
}

.ontology-category h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    text-align: center;
    font-size: 1.4rem;
}

.ontology-category ul {
    list-style-type: none;
}

.ontology-category li {
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
}

.ontology-category li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.ontology-download {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2.5rem;
    text-align: center;
    margin-top: 3rem;
    border: 1px solid rgba(0, 0, 0, 0.05);
    background-image: url('data:image/svg+xml;charset=utf8,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"%3E%3Cpath fill="%236366f1" fill-opacity="0.05" d="M0,192L48,197.3C96,203,192,213,288,229.3C384,245,480,267,576,250.7C672,235,768,181,864,181.3C960,181,1056,235,1152,234.7C1248,235,1344,181,1392,154.7L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"%3E%3C/path%3E%3C/svg%3E');
    background-position: bottom;
    background-repeat: no-repeat;
    background-size: cover;
}

.ontology-download h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.6rem;
}

.ontology-download p {
    max-width: 600px;
    margin: 0 auto 1.5rem;
}

.ontology-download .btn {
    margin-top: 1rem;
}

/* Mermaid Diagram */
.mermaid-container {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2.5rem;
    margin: 2.5rem 0;
    overflow-x: auto;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

/* Visualization Section */
.visualization-container {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2.5rem;
    margin: 2.5rem 0;
    border: 1px solid rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

#visualization-placeholder {
    min-height: 400px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

#visualization-placeholder p {
    max-width: 600px;
    margin: 0 auto 1rem;
}

#knowledge-graph-visualization {
    width: 100%;
    height: 500px;
    margin-top: 1.5rem;
}

.visualization-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.visualization-controls button {
    background-color: white;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.visualization-controls button:hover,
.visualization-controls button.active {
    background-color: var(--primary-color);
    color: white;
}

/* Documentation Section */
.documentation-container {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2.5rem;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.documentation-list {
    list-style-type: none;
    padding: 0;
}

.documentation-list li {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: flex-start;
}

.documentation-list li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.documentation-list li .doc-icon {
    margin-right: 1rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.documentation-list li .doc-content {
    flex-grow: 1;
}

.documentation-list li h4 {
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
}

.documentation-list li p {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

/* Authors Section */
.authors {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2.5rem;
    margin-top: 3rem;
    border: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.authors::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--primary-light));
}

.authors h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
}

.author-card {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
}

.author-card:last-child {
    margin-bottom: 0;
}

.author-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--primary-light);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin-right: 1.5rem;
    flex-shrink: 0;
}

.author-info {
    flex-grow: 1;
}

.author-info h4 {
    margin-bottom: 0.3rem;
}

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

/* Footer */
footer {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(34, 62, 40, 0.92) 55%, rgba(74, 157, 60, 0.9) 100%);
    color: white;
    padding: 3rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 -12px 30px rgba(15, 23, 42, 0.22);
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
}

footer .container {
    position: relative;
    z-index: 1;
}

footer p {
    margin-bottom: 0.5rem;
    opacity: 0.85;
}

.footer-links {
    margin-bottom: 2rem;
}

.footer-links a {
    color: white;
    margin: 0 1rem;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
    text-decoration: none;
}

footer p a {
    color: var(--accent-color);
    font-weight: 600;
    text-decoration: none;
    margin: 0 0.35rem;
    transition: color 0.2s ease, opacity 0.2s ease;
}

footer p a:hover {
    color: var(--accent-light);
    opacity: 1;
}

/* Card Styles */
.card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2.5rem;
    border: 1px solid rgba(0, 0, 0, 0.05);
    height: 100%;
}

/* Animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.6s ease-out forwards;
}

/* Responsive Adjustments */
@media (max-width: 992px) {
    header h1 {
        font-size: 2.2rem;
    }
    
    .section h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    header {
        padding: 2.5rem 0;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .section {
        padding: 4rem 0;
    }
    
    .section h2 {
        font-size: 1.8rem;
    }
    
    .dataset-grid {
        grid-template-columns: 1fr;
    }
    
    .ontology-categories {
        grid-template-columns: 1fr;
    }
    
    nav ul {
        flex-direction: column;
    }
    
    nav ul li {
        margin-right: 0;
        margin-bottom: 0.5rem;
    }
}

@media (max-width: 576px) {
    header h1 {
        font-size: 1.8rem;
    }
    
    header .subtitle {
        font-size: 1.1rem;
    }
    
    .section h2 {
        font-size: 1.6rem;
    }
    
    .dataset-card,
    .ontology-category,
    .documentation-container,
    .visualization-container,
    .authors {
        padding: 1.5rem;
    }
}