/* ============================================
   Portfolio Section - Extended Styles
   Extends main styles.css with portfolio-specific components
   ============================================ */

/* Portfolio Navigation */
.portfolio-nav {
    position: fixed;
    top: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    width: calc(100% - var(--space-xl) * 2);
    max-width: 1200px;
}

.portfolio-nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-xl);
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
}

.portfolio-nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
}

.portfolio-nav-logo i {
    color: var(--color-primary);
}

.portfolio-nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    list-style: none;
}

.portfolio-nav-link {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.portfolio-nav-link:hover,
.portfolio-nav-link.active {
    color: var(--color-text);
    background: var(--color-primary-dim);
}

.portfolio-nav-link.back-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* Portfolio Hero */
.portfolio-hero {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 140px var(--space-xl) var(--space-3xl);
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.portfolio-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-primary-dim);
    border: 1px solid rgba(0, 212, 170, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s ease forwards;
}

.portfolio-hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-md);
    animation: fadeInUp 0.6s ease 0.1s forwards;
    opacity: 0;
}

.portfolio-hero-title .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.portfolio-hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.6s ease 0.2s forwards;
    opacity: 0;
}

.portfolio-hero-description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto var(--space-2xl);
    animation: fadeInUp 0.6s ease 0.3s forwards;
    opacity: 0;
}

/* Quick Stats */
.portfolio-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-2xl);
    padding: var(--space-xl) 0;
    margin-bottom: var(--space-2xl);
    animation: fadeInUp 0.6s ease 0.4s forwards;
    opacity: 0;
}

.portfolio-stat {
    text-align: center;
}

.portfolio-stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-text);
    line-height: 1;
}

.portfolio-stat-number::after {
    content: '+';
    color: var(--color-primary);
    font-size: 2rem;
}

.portfolio-stat-label {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: var(--space-xs);
}

/* Navigation Cards Grid */
.portfolio-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--space-xl) var(--space-4xl);
}

.portfolio-card {
    position: relative;
    padding: var(--space-2xl);
    background: var(--gradient-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-base);
    overflow: hidden;
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}

.portfolio-card:nth-child(1) { animation-delay: 0.5s; }
.portfolio-card:nth-child(2) { animation-delay: 0.6s; }
.portfolio-card:nth-child(3) { animation-delay: 0.7s; }
.portfolio-card:nth-child(4) { animation-delay: 0.8s; }

.portfolio-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.portfolio-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.portfolio-card:hover::before {
    transform: scaleX(1);
}

.portfolio-card-icon {
    width: 56px;
    height: 56px;
    background: var(--color-primary-dim);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
    transition: all var(--transition-base);
}

.portfolio-card:hover .portfolio-card-icon {
    background: var(--gradient-primary);
    color: var(--color-bg);
    transform: scale(1.1);
}

.portfolio-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.portfolio-card-description {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.portfolio-card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.portfolio-card-arrow {
    position: absolute;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 40px;
    height: 40px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    transition: all var(--transition-base);
}

.portfolio-card:hover .portfolio-card-arrow {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-bg);
    transform: translateX(4px);
}

/* Page Header */
.page-header {
    padding: 140px var(--space-xl) var(--space-3xl);
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.page-header-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-primary-dim);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
}

.page-header-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: var(--space-md);
}

.page-header-description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* Filter Pills */
.filter-container {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
    padding: 0 var(--space-xl) var(--space-2xl);
    max-width: 1200px;
    margin: 0 auto;
}

.filter-pill {
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-pill:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.filter-pill.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--color-bg);
}

/* Experience Timeline */
.timeline-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--space-xl) var(--space-4xl);
    position: relative;
}

.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
    transform: translateX(-50%);
}

.timeline-progress {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--gradient-primary);
    height: 0;
    transition: height 0.5s ease;
}

.timeline-item {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 60px 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.timeline-item:nth-child(odd) .timeline-content {
    grid-column: 1;
    text-align: right;
}

.timeline-item:nth-child(odd) .timeline-date {
    grid-column: 3;
    text-align: left;
}

.timeline-item:nth-child(even) .timeline-content {
    grid-column: 3;
    text-align: left;
}

.timeline-item:nth-child(even) .timeline-date {
    grid-column: 1;
    text-align: right;
}

.timeline-marker {
    grid-column: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 2;
}

.timeline-dot {
    width: 20px;
    height: 20px;
    background: var(--color-bg);
    border: 3px solid var(--color-primary);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.timeline-item:hover .timeline-dot {
    background: var(--color-primary);
    box-shadow: 0 0 20px var(--color-primary-glow);
    transform: scale(1.3);
}

.timeline-content {
    padding: var(--space-xl);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.timeline-content:hover {
    border-color: var(--color-border-hover);
    transform: scale(1.02);
}

.timeline-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--space-md);
    display: inline-block;
}

.timeline-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.timeline-role {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.timeline-company {
    font-size: 1rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--space-md);
}

.timeline-description {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    justify-content: inherit;
}

.timeline-date {
    display: flex;
    align-items: flex-start;
    padding-top: var(--space-xl);
}

.timeline-date span {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    background: var(--color-surface);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
}

/* Impact Metrics */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl) var(--space-3xl);
}

.metric-card {
    padding: var(--space-xl);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
}

.metric-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.metric-icon {
    width: 48px;
    height: 48px;
    background: var(--color-primary-dim);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--color-primary);
    margin: 0 auto var(--space-md);
}

.metric-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-text);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.metric-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Impact Cards */
.impact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl) var(--space-4xl);
}

.impact-card {
    padding: var(--space-xl);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.impact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
}

.impact-card:hover {
    border-color: var(--color-border-hover);
    transform: translateX(8px);
}

.impact-card-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.impact-card-icon {
    width: 44px;
    height: 44px;
    background: var(--color-primary-dim);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.impact-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.4;
}

.impact-card-description {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.impact-card-tag {
    display: inline-block;
    margin-top: var(--space-md);
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-surface);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

/* Skills Section */
.skills-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl) var(--space-4xl);
}

.skills-category {
    margin-bottom: var(--space-3xl);
}

.skills-category-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.skills-category-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--color-bg);
}

.skills-category-title {
    font-size: 1.5rem;
    font-weight: 700;
}

/* Skill Bars */
.skill-bars {
    display: grid;
    gap: var(--space-lg);
}

.skill-bar-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    transition: all var(--transition-base);
}

.skill-bar-item:hover {
    border-color: var(--color-primary-dim);
}

.skill-bar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.skill-bar-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.skill-bar-percentage {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-primary);
}

.skill-bar-track {
    height: 8px;
    background: var(--color-bg);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.skill-bar-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    width: 0;
    transition: width 1s ease;
}

/* Technical Skills Grid */
.tech-skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--space-md);
}

.tech-skill-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.tech-skill-item:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-dim);
}

.tech-skill-item i {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.tech-skill-item:hover i {
    color: var(--color-primary);
}

.tech-skill-item span {
    font-size: 0.9rem;
    font-weight: 500;
}

/* Education Section */
.education-section {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.education-card {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    padding: var(--space-xl);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.education-logo {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    overflow: hidden;
    flex-shrink: 0;
}

.education-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.education-details h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.education-details .degree {
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.education-details .year {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* CTA Section */
.portfolio-cta {
    text-align: center;
    padding: var(--space-3xl) var(--space-xl);
    max-width: 800px;
    margin: 0 auto;
}

.portfolio-cta-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.portfolio-cta-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

.portfolio-cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
}

/* Footer */
.portfolio-footer {
    text-align: center;
    padding: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.portfolio-footer p {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .portfolio-cards {
        grid-template-columns: 1fr;
        max-width: 600px;
    }
    
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .impact-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline-item {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .timeline-line {
        left: 20px;
    }
    
    .timeline-marker {
        position: absolute;
        left: 11px;
        grid-column: 1;
    }
    
    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        grid-column: 1;
        text-align: left;
        margin-left: 50px;
    }
    
    .timeline-item:nth-child(odd) .timeline-date,
    .timeline-item:nth-child(even) .timeline-date {
        grid-column: 1;
        text-align: left;
        margin-left: 50px;
        padding-top: 0;
        margin-bottom: var(--space-sm);
    }
    
    .timeline-tags {
        justify-content: flex-start;
    }
}

@media (max-width: 768px) {
    .portfolio-nav-container {
        padding: var(--space-sm) var(--space-md);
    }
    
    .portfolio-nav-links {
        display: none;
    }
    
    .portfolio-stats {
        flex-direction: column;
        gap: var(--space-xl);
    }
    
    .portfolio-hero {
        padding-top: 100px;
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .education-card {
        flex-direction: column;
        text-align: center;
    }
    
    .portfolio-cta-buttons {
        flex-direction: column;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes countUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hidden by filter */
.timeline-item.hidden {
    display: none;
}