/* OutboundLabs Research - Main Stylesheet */

:root {
    --brand-orange: #FF6B35;
    --dark-bg: #1a1a1a;
    --light-bg: #ffffff;
    --text-primary: #333333;
    --text-secondary: #666666;
    --border-color: #e0e0e0;
    --accent-green: #4CAF50;
    --hover-color: #ff8555;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: #f8f9fa;
}

/* Header Styles */
.site-header {
    background: var(--dark-bg);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: white;
}

.logo-img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--brand-orange);
}

.nav-menu ul {
    list-style: none;
    display: flex;
    gap: 2rem;
    margin: 0;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: var(--brand-orange);
}

.btn-contact {
    background: var(--brand-orange);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.3s ease;
}

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

/* Container Layout */
.container {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 3rem;
}

/* Sidebar */
.sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.research-sidebar {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.sidebar-section {
    margin-bottom: 2rem;
}

.sidebar-section:last-child {
    margin-bottom: 0;
}

.sidebar-section h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--dark-bg);
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--brand-orange);
}

.category-list,
.subcategory-list,
.recent-list {
    list-style: none;
}

.category-item {
    margin-bottom: 1.5rem;
}

.category-link {
    font-weight: 600;
    color: var(--dark-bg);
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.category-link:hover {
    color: var(--brand-orange);
}

.category-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.subcategory-list {
    margin-top: 0.5rem;
    padding-left: 1rem;
}

.subcategory-list li {
    margin-bottom: 0.5rem;
}

.subcategory-list a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.subcategory-list a:hover {
    color: var(--brand-orange);
}

.recent-list li {
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.recent-list li:last-child {
    border-bottom: none;
}

.recent-list a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    display: block;
    margin-bottom: 0.25rem;
}

.recent-list a:hover {
    color: var(--brand-orange);
}

.recent-date {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Main Content */
.content {
    background: white;
    border-radius: 8px;
    padding: 3rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    min-height: 500px;
}

/* Article Styles */
.research-article {
    max-width: 900px;
}

.article-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
}

.article-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--dark-bg);
    margin-bottom: 1rem;
}

.article-meta {
    display: flex;
    gap: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.article-category {
    margin-top: 0.5rem;
}

.category-badge {
    display: inline-block;
    background: var(--brand-orange);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* Article Content */
.article-content {
    font-size: 1.05rem;
    line-height: 1.8;
}

.article-content h2 {
    font-size: 1.8rem;
    font-weight: 600;
    margin: 2rem 0 1rem;
    color: var(--dark-bg);
}

.article-content h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin: 1.5rem 0 1rem;
    color: var(--dark-bg);
}

.article-content h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 1.25rem 0 0.75rem;
    color: var(--dark-bg);
}

.article-content p {
    margin-bottom: 1.25rem;
}

.article-content ul,
.article-content ol {
    margin-bottom: 1.25rem;
    padding-left: 2rem;
}

.article-content li {
    margin-bottom: 0.5rem;
}

.article-content a {
    color: var(--brand-orange);
    text-decoration: none;
    border-bottom: 1px solid var(--brand-orange);
    transition: all 0.3s ease;
}

.article-content a:hover {
    color: var(--hover-color);
    border-bottom-color: var(--hover-color);
}

.article-content code {
    background: #f4f4f4;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

.article-content pre {
    background: #f4f4f4;
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    margin-bottom: 1.25rem;
}

.article-content pre code {
    background: none;
    padding: 0;
}

.article-content blockquote {
    border-left: 4px solid var(--brand-orange);
    padding-left: 1.5rem;
    margin: 1.5rem 0;
    color: var(--text-secondary);
    font-style: italic;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1.5rem 0;
}

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

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

.article-content th {
    background: #f8f9fa;
    font-weight: 600;
}

/* Article Footer */
.article-footer {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--border-color);
}

.tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
}

.tag {
    background: #f0f0f0;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Footer */
.site-footer {
    background: var(--dark-bg);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-logo-img {
    height: 40px;
    margin-bottom: 2rem;
}

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

.footer-section h4 {
    color: var(--brand-orange);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer-section p {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--brand-orange);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: var(--text-secondary);
}

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

.research-card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.research-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.research-card h3 {
    color: var(--dark-bg);
    margin-bottom: 0.5rem;
}

.research-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .container {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-menu ul {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
    
    .content {
        padding: 1.5rem;
    }
    
    .article-title {
        font-size: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}