/* ============================================
   Research Page Styles
   ============================================ */

.page-content {
    padding-top: 60px;
}

.page-hero {
    padding: var(--spacing-2xl) 0;
    border-bottom: 1px solid var(--color-border);
}

.page-hero h1 {
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 700px;
    line-height: 1.6;
}

.back-link {
    display: inline-block;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

.back-link:hover {
    color: var(--color-text);
}

/* Philosophy Block */
.philosophy-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.philosophy-block {
    max-width: 800px;
    padding: var(--spacing-xl);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
}

.philosophy-image img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

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

    .philosophy-image {
        order: -1;
    }
}

.philosophy-block h2 {
    margin-bottom: var(--spacing-md);
}

.philosophy-block p {
    color: var(--color-text-muted);
    font-size: 1.0625rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.philosophy-block p:last-child {
    margin-bottom: 0;
}

/* Research Grid */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    align-items: start;
}

.research-card {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition);
}

.research-card.expandable {
    cursor: pointer;
}

.research-card.expandable:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.research-card.expandable[data-expanded="true"] {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.research-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.research-card-content {
    margin-top: var(--spacing-md);
}

.research-card-content p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.expand-icon {
    flex-shrink: 0;
    transition: transform 0.3s ease;
    color: var(--color-text-muted);
}

.research-card.expandable[data-expanded="true"] .expand-icon {
    transform: rotate(180deg);
    color: var(--color-primary);
}

.research-icon {
    font-size: 1.75rem;
}

.research-card h3 {
    font-size: 1.25rem;
    margin: 0;
}

.research-card > p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.research-details {
    margin-bottom: var(--spacing-md);
}

.research-details h4 {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.research-details ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.research-details li {
    font-size: 0.9375rem;
    color: var(--color-text);
    padding: 0.375rem 0;
    padding-left: 1.25rem;
    position: relative;
}

.research-details li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-text-light);
}

.research-tags-small {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border-light);
    margin-top: var(--spacing-md);
}

.research-tags-small span {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.375rem 0.875rem;
    border-radius: 6px;
    border: 1px solid;
}

/* Brand Colors for Technology Tags */
.tag-openai { background: #10A37F; color: white; border-color: #10A37F; }
.tag-claude { background: #7C3AED; color: white; border-color: #7C3AED; }
.tag-apple { background: #000000; color: white; border-color: #000000; }
.tag-swift { background: #F05138; color: white; border-color: #F05138; }
.tag-langchain { background: #1C3C3C; color: white; border-color: #1C3C3C; }
.tag-azure { background: #0078D4; color: white; border-color: #0078D4; }
.tag-aws { background: #FF9900; color: white; border-color: #FF9900; }
.tag-docker { background: #2496ED; color: white; border-color: #2496ED; }
.tag-kubernetes { background: #326CE5; color: white; border-color: #326CE5; }
.tag-github { background: #24292E; color: white; border-color: #24292E; }
.tag-terraform { background: #7B42BC; color: white; border-color: #7B42BC; }
.tag-fastlane { background: #00D762; color: white; border-color: #00D762; }
.tag-datadog { background: #632CA6; color: white; border-color: #632CA6; }
.tag-mixpanel { background: #7856FF; color: white; border-color: #7856FF; }
.tag-amplitude { background: #2C5EA8; color: white; border-color: #2C5EA8; }
.tag-google { background: #4285F4; color: white; border-color: #4285F4; }
.tag-dbt { background: #FF694B; color: white; border-color: #FF694B; }
.tag-oauth { background: #4B8BBE; color: white; border-color: #4B8BBE; }
.tag-security { background: #28A745; color: white; border-color: #28A745; }
.tag-gdpr { background: #0033A0; color: white; border-color: #0033A0; }
.tag-hipaa { background: #0072C6; color: white; border-color: #0072C6; }
.tag-duckdb { background: #FFF000; color: #000; border-color: #FFF000; }
.tag-powerbi { background: #F2C811; color: #000; border-color: #F2C811; }
.tag-supabase { background: #3ECF8E; color: white; border-color: #3ECF8E; }
.tag-containers { background: #0DB7ED; color: white; border-color: #0DB7ED; }
.tag-gemini { background: #8E75B2; color: white; border-color: #8E75B2; }
.tag-perplexity { background: #20808D; color: white; border-color: #20808D; }
.tag-microsoft { background: #00A4EF; color: white; border-color: #00A4EF; }
.tag-python { background: #3776AB; color: white; border-color: #3776AB; }
.tag-javascript { background: #F7DF1E; color: #000; border-color: #F7DF1E; }
.tag-typescript { background: #3178C6; color: white; border-color: #3178C6; }
.tag-sql { background: #4479A1; color: white; border-color: #4479A1; }
.tag-react { background: #61DAFB; color: #000; border-color: #61DAFB; }
.tag-node { background: #339933; color: white; border-color: #339933; }
.tag-firebase { background: #FFCA28; color: #000; border-color: #FFCA28; }
.tag-vercel { background: #000000; color: white; border-color: #000000; }
.tag-postgresql { background: #336791; color: white; border-color: #336791; }
.tag-vscode { background: #007ACC; color: white; border-color: #007ACC; }
.tag-git { background: #F05032; color: white; border-color: #F05032; }
.tag-figma { background: #F24E1E; color: white; border-color: #F24E1E; }
.tag-linear { background: #5E6AD2; color: white; border-color: #5E6AD2; }
.tag-notion { background: #000000; color: white; border-color: #000000; }

/* Technologies Section */
.technologies-section {
    background: var(--color-bg-alt);
}

.tech-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.tech-category h3 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.tech-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-list span {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text);
    background: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

/* CTA Section */
.cta-section {
    background: var(--color-bg);
}

.cta-block {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    padding: var(--spacing-2xl);
    background: var(--color-bg-dark);
    border-radius: var(--radius-lg);
    color: white;
}

.cta-block h2 {
    color: white;
    margin-bottom: var(--spacing-sm);
}

.cta-block p {
    color: rgba(255,255,255,0.7);
    margin-bottom: var(--spacing-md);
}

.cta-block .btn-primary {
    background: white;
    color: var(--color-text);
}

.cta-block .btn-primary:hover {
    background: var(--color-bg-alt);
}

/* Active nav state */
.nav-links a.active {
    color: var(--color-text);
}

/* Technical Skills Section */
.technical-skills-section {
    background: var(--color-bg-alt);
}

.technical-skills-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background: white;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition);
}

.technical-skills-toggle:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-alt);
}

.technical-skills-toggle.expanded {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: white;
}

.technical-skills-toggle .toggle-icon {
    transition: transform 0.3s ease;
}

.technical-skills-toggle.expanded .toggle-icon {
    transform: rotate(180deg);
}

.technical-skills-content {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

/* Articles Section */
.articles-section {
    background: var(--color-bg);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.article-card {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
}

.article-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.article-image {
    width: 100%;
    height: 220px;
    overflow: hidden;
    background: var(--color-bg-alt);
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.article-card:hover .article-image img {
    transform: scale(1.05);
}

.article-content {
    padding: var(--spacing-lg);
}

.article-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.article-meta time {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.article-content h3 {
    font-size: 1.25rem;
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.article-content p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.article-link {
    display: inline-block;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-primary);
    transition: all var(--transition);
}

.article-link:hover {
    color: var(--color-primary-hover);
    transform: translateX(4px);
}

.coming-soon-article {
    background: linear-gradient(135deg, #F9FAFB 0%, #F3F4F6 100%);
    border: 2px dashed var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
}

.coming-soon-article .coming-soon-badge {
    display: inline-block;
}

/* Quick Actions Section */
.quick-actions-section {
    background: var(--color-bg);
}

.quick-actions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.quick-action-card {
    position: relative;
    padding: var(--spacing-xl);
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition);
    text-decoration: none;
    color: inherit;
}

.quick-action-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.quick-action-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.quick-action-icon svg {
    color: var(--color-primary);
}

.quick-action-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.quick-action-card p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.quick-action-arrow {
    font-size: 1.5rem;
    color: var(--color-primary);
    transition: transform var(--transition);
    display: inline-block;
}

.quick-action-card:hover .quick-action-arrow {
    transform: translateX(8px);
}

/* Responsive */
@media (max-width: 768px) {
    .research-grid {
        grid-template-columns: 1fr;
    }

    .philosophy-block {
        padding: var(--spacing-md);
    }

    .articles-grid {
        grid-template-columns: 1fr;
    }

    .technical-skills-toggle {
        font-size: 1rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .quick-actions-grid {
        grid-template-columns: 1fr;
    }
}