/* ============================================
   Education & Research Page Styles
   ============================================ */

/* Timeline Styles */
.education-section,
.research-section,
.professional-section {
    padding: var(--spacing-xl) var(--spacing-md);
}

.education-section {
    background: var(--color-bg);
}

.research-section {
    background: var(--color-bg-alt);
}

.professional-section {
    background: var(--color-bg);
}

.education-timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.education-timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    padding-left: calc(30px + var(--spacing-lg));
    margin-bottom: var(--spacing-xl);
}

.timeline-marker {
    position: absolute;
    left: 20px;
    top: 8px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 4px solid var(--color-bg);
    box-shadow: 0 0 0 2px var(--color-accent);
    z-index: 2;
}

.timeline-content {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    transition: var(--transition-smooth);
}

.timeline-content:hover {
    transform: translateX(10px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--color-accent);
}

.timeline-header {
    margin-bottom: var(--spacing-md);
}

.timeline-header h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.timeline-institution {
    display: block;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-xs);
}

.timeline-date {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--color-bg-alt);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-light);
}

.timeline-body p {
    line-height: 1.8;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

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

/* Research Cards */
.research-cards {
    max-width: 900px;
    margin: 0 auto;
}

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

.research-card.featured {
    border: 2px solid var(--color-accent);
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-bg-alt) 100%);
}

.research-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.research-header h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.research-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.research-institution {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-secondary);
}

.research-dates {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--color-accent);
    color: var(--color-white);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
}

.research-focus {
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.research-list {
    list-style: none;
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-md);
}

.research-list li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-light);
    line-height: 1.7;
}

.research-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

.research-description {
    line-height: 1.8;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.research-affiliation {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.research-affiliation p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
}

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

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

/* Professional Timeline */
.professional-timeline {
    max-width: 900px;
    margin: 0 auto;
}

.professional-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    transition: var(--transition-smooth);
}

.professional-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    border-color: var(--color-accent);
}

.professional-header h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.professional-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.professional-org {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-secondary);
}

.professional-dates {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-light);
}

.professional-intro {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.professional-roles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.role-card {
    padding: var(--spacing-md);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
}

.role-card h4 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

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

.role-card li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-light);
    line-height: 1.7;
}

.role-card li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Skills Section */
.skills-section {
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--color-primary);
    color: var(--color-white);
}

.skills-section .section-title {
    color: var(--color-white);
}

.skills-section .section-title::after {
    background: var(--color-accent);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.skill-category {
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
}

.skill-category h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
}

.skill-list {
    list-style: none;
    padding-left: 0;
}

.skill-list li {
    padding: var(--spacing-xs) 0;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.7;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.skill-list strong {
    color: var(--color-white);
}

.skill-category .source-ref {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.skill-category .source-ref small {
    color: rgba(255, 255, 255, 0.6);
}

.skill-category .source-ref a {
    color: var(--color-accent);
}

.skill-category .source-ref a:hover {
    color: var(--color-white);
}

/* Source References */
.source-ref {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.source-ref small {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.source-ref a {
    color: var(--color-secondary);
    text-decoration: underline;
    text-decoration-color: var(--color-accent);
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
}

.source-ref a:hover {
    color: var(--color-accent);
}

/* Responsive */
@media (max-width: 768px) {
    .education-timeline::before {
        left: 15px;
    }

    .timeline-item {
        padding-left: calc(15px + var(--spacing-md));
    }

    .timeline-marker {
        left: 5px;
    }

    .professional-roles {
        grid-template-columns: 1fr;
    }

    .research-meta,
    .professional-meta {
        flex-direction: column;
        align-items: flex-start;
    }
}