/*
Theme Name: Ferroptosis Research Hub
Theme URI: https://ferroptosis-homepage.com
Description: A custom WordPress theme for ferroptosis research resources, featuring organized content categories, user collaboration features, and automated research paper integration.
Version: 1.0
Author: L
Text Domain: ferroptosis-hub
*/

/* CSS Variables for Consistent Theme */
:root {
    --primary-color: #92A5FD;
    --secondary-color: #6B7FFF;
    --accent-color: #FF6B9D;
    --text-dark: #1a1a1a;
    --text-light: #666;
    --background: #ffffff;
    --background-alt: #f8f9fa;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(146,165,253,0.15);
    --shadow-hover: 0 4px 16px rgba(146,165,253,0.25);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    color: var(--text-dark);
    line-height: 1.7;
    background-color: var(--background);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

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

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

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

/* Header */
.site-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 1.5rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-title {
    font-size: 1.8rem;
    color: white;
    margin: 0;
}

.site-title a {
    color: white;
    text-decoration: none;
}

/* Navigation */
.main-navigation ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.main-navigation a {
    color: white;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.main-navigation a:hover {
    background: rgba(255,255,255,0.2);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, rgba(44, 95, 141, 0.05) 0%, rgba(74, 144, 199, 0.05) 100%);
    padding: 4rem 0;
    text-align: center;
}

.hero-section h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-section p {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
}

/* Category Grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 4rem 0;
}

.category-card {
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--secondary-color);
}

.category-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.category-card ul {
    list-style: none;
    padding-left: 0;
}

.category-card li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--background-alt);
}

.category-card li:last-child {
    border-bottom: none;
}

.category-card a {
    display: block;
    padding: 0.25rem 0;
}

/* Content Area */
.content-area {
    padding: 4rem 0;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.main-content {
    background: var(--background);
}

.sidebar {
    background: var(--background-alt);
    padding: 2rem;
    border-radius: var(--border-radius);
    height: fit-content;
    position: sticky;
    top: 100px;
}

/* Post Content */
.post-content {
    background: var(--background);
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.post-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin: 1.5rem 0;
}

/* Research Papers Section */
.research-papers {
    background: var(--background-alt);
    padding: 4rem 0;
}

.paper-card {
    background: var(--background);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.paper-card:hover {
    box-shadow: var(--shadow-hover);
}

.paper-card h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.paper-meta {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

/* User Directory */
.user-directory {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    padding: 0;
}

.user-card {
    background: var(--background);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.user-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

.user-name {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.user-bio {
    color: var(--text-dark);
    font-size: 0.95rem;
    line-height: 1.6;
}

.user-card a {
    word-break: break-all;
}

.contact-btn {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: var(--secondary-color);
    color: white;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

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

/* Footer */
.site-footer {
    background: var(--primary-color);
    color: white;
    padding: 3rem 0 1.5rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: white;
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: rgba(255,255,255,0.8);
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.2);
    color: rgba(255,255,255,0.7);
}

/* Responsive Design */
@media (max-width: 768px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .main-navigation ul {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .site-header .container {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Utility Classes */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--secondary-color);
    color: white;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-weight: 500;
}

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

.btn-outline {
    background: transparent;
    border: 2px solid var(--secondary-color);
    color: var(--secondary-color);
}

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

/* Content Area Styling */
.entry-content {
    font-size: 1.05rem;
    line-height: 1.8;
}

.entry-content p {
    margin-bottom: 1.5rem;
}

.entry-content ul,
.entry-content ol {
    margin-bottom: 1.5rem;
    margin-left: 0;
    padding-left: 2.5rem;
}

.entry-content li {
    margin-bottom: 0.75rem;
    line-height: 1.8;
    padding-left: 0.5rem;
}

.entry-content h2,
.entry-content h3,
.entry-content h4 {
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.entry-content h2:first-child,
.entry-content h3:first-child {
    margin-top: 0;
}

/* Ensure main content area has proper padding */
.post-content {
    padding: 0 1rem;
}

.main-content {
    padding-right: 2rem;
}