/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --text-color: #333;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --border-color: #dee2e6;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

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

/* Header */
header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
    color: white;
    padding: 3rem 0;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.tagline {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Navigation */
.main-nav {
    background-color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.main-nav .container {
    display: flex;
    gap: 2rem;
    padding: 1rem 20px;
}

.main-nav a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.main-nav a:hover {
    color: var(--secondary-color);
}

/* Main Content */
main {
    padding: 3rem 0;
}

section {
    margin-bottom: 4rem;
}

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

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

/* Intro Section */
.intro ul, .intro ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.intro li {
    margin-bottom: 0.5rem;
}

/* Phenomenon Cards */
.phenomenon-card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    position: relative;
    transition: transform 0.3s, box-shadow 0.3s;
}

.phenomenon-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.rank-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--secondary-color);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
}

.phenomenon-card h3 {
    margin-top: 0;
}

.phenomenon-card h3 a {
    color: var(--primary-color);
    text-decoration: none;
}

.priority-score {
    color: var(--success-color);
    font-weight: bold;
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.description {
    color: #555;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: var(--bg-color);
    border-radius: 4px;
}

.metric {
    font-size: 0.95rem;
    color: #666;
}

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

.btn {
    display: inline-block;
    background-color: var(--secondary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s;
    font-weight: 500;
}

.btn:hover {
    background-color: #2980b9;
}

.btn.disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
}

/* Compact List */
.compact-list {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 2rem;
    margin-top: 2rem;
}

.compact-list ol {
    margin-left: 2rem;
}

.compact-list li {
    margin-bottom: 1rem;
    line-height: 1.8;
}

/* Category Grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.category {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.category h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.category ul {
    list-style: none;
}

.category li {
    margin-bottom: 0.75rem;
}

.category a {
    color: var(--secondary-color);
    text-decoration: none;
}

.category a:hover {
    text-decoration: underline;
}

/* Status Badges */
.status {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-left: 0.5rem;
}

.status.explained {
    background-color: #d4edda;
    color: #155724;
}

.status.research {
    background-color: #cce5ff;
    color: #004085;
}

.status.debate {
    background-color: #fff3cd;
    color: #856404;
}

.status.mystery {
    background-color: #f8d7da;
    color: #721c24;
}

.status.debunked {
    background-color: #e2e3e5;
    color: #383d41;
}

/* Methodology Grid */
.methodology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.method-card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

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

.method-card ul {
    list-style: none;
}

.method-card li {
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    position: relative;
}

.method-card li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-top: 4rem;
}

footer a {
    color: var(--secondary-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .main-nav .container {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .metrics {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .rank-badge {
        position: static;
        margin-bottom: 1rem;
    }
    
    .phenomenon-card {
        padding: 1.5rem;
    }
}

/* Phenomenon Detail Pages */
.phenomenon-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
    color: white;
    padding: 2rem 0;
}

.breadcrumb {
    padding: 1rem 0;
    background-color: #ecf0f1;
}

.breadcrumb a {
    color: var(--secondary-color);
    text-decoration: none;
}

.content-section {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.content-section h3 {
    color: var(--secondary-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.content-section h3:first-child {
    margin-top: 0;
}

.theory-card, .research-proposal {
    background-color: var(--bg-color);
    border-left: 4px solid var(--secondary-color);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 4px;
}

.evidence-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin: 1.5rem 0;
}

.evidence-grid h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.evidence-grid ul {
    list-style: none;
}

.evidence-grid li {
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    position: relative;
}

.evidence-grid li::before {
    position: absolute;
    left: 0;
    font-weight: bold;
}

.strengths li::before {
    content: "✓";
    color: var(--success-color);
}

.gaps li::before {
    content: "△";
    color: var(--warning-color);
}

.reference-list {
    font-size: 0.95rem;
    line-height: 1.8;
}

.reference-list li {
    margin-bottom: 1rem;
}

blockquote {
    border-left: 4px solid var(--secondary-color);
    padding-left: 1.5rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: #555;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

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

@media (max-width: 768px) {
    .evidence-grid {
        grid-template-columns: 1fr;
    }
}