/* ===============================================
   PORTFOLIO PAGE STYLES
   =============================================== */

/* Portfolio Hero Enhancements */
.portfolio-hero {
    min-height: 80vh;
    padding-top: 120px;
}

.hero-actions {
    display: flex;
    gap: 20px;
    margin-top: 30px;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.hero-actions .cta-button {
    flex: 0 0 auto;
}

/* Skills Categories */
.skills-categories {
    margin-top: 50px;
}

.skill-category {
    margin-bottom: 60px;
}

.category-title {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: 30px;
    position: relative;
    padding-left: 30px;
}

.category-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 30px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.skill-level {
    width: 100%;
    height: 4px;
    background: var(--bg-primary);
    border-radius: 2px;
    margin-top: 15px;
    overflow: hidden;
}

.level-indicator {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: width 2s ease-in-out;
    position: relative;
}

.level-indicator::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 10px;
    height: 100%;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-10px); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateX(10px); opacity: 0; }
}

/* Project Filters */
.project-filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 40px 0 50px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 12px 24px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 25px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-medium);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}

/* Timeline Enhancements */
.timeline-section {
    padding: 100px 0;
    background: var(--bg-primary);
}

.timeline-tags {
    display: flex;
    gap: 8px;
    margin-top: 15px;
    flex-wrap: wrap;
}

.timeline-tags .tag {
    padding: 4px 12px;
    background: var(--primary-purple);
    color: white;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.timeline-date {
    font-size: 14px;
    color: var(--primary-cyan);
    font-weight: 600;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.timeline-content h3 {
    font-size: 22px;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.timeline-content h4 {
    font-size: 16px;
    color: var(--primary-purple);
    margin-bottom: 15px;
    font-weight: 600;
}

.timeline-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 15px;
}

/* Contact CTA Section */
.contact-cta {
    padding: 100px 0;
    background: var(--bg-secondary);
    text-align: center;
    position: relative;
}

.contact-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0.05;
    z-index: 1;
}

.cta-content {
    position: relative;
    z-index: 2;
}

.cta-content h2 {
    font-size: 42px;
    color: var(--text-primary);
    margin-bottom: 20px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.cta-content p {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.6;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* Project Item Animations */
.project-item {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.project-item.filtered {
    opacity: 0;
    transform: translateY(50px) scale(0.8);
    pointer-events: none;
}

/* Enhanced Skill Cards */
.skill-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
}

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

.skill-card:hover .skill-icon i {
    color: white;
}

/* Loading States */
.loading-skeleton {
    background: linear-gradient(90deg, var(--bg-glass) 25%, rgba(255,255,255,0.1) 50%, var(--bg-glass) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Responsive Design for Portfolio */
@media (max-width: 1024px) {
    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .portfolio-hero {
        min-height: 70vh;
        padding-top: 100px;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-actions .cta-button {
        width: 100%;
        max-width: 280px;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .project-filters {
        gap: 10px;
    }
    
    .filter-btn {
        padding: 10px 16px;
        font-size: 12px;
    }
    
    .cta-content h2 {
        font-size: 32px;
    }
    
    .cta-content p {
        font-size: 16px;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-actions .cta-button {
        width: 100%;
        max-width: 280px;
    }
}

@media (max-width: 480px) {
    .timeline-section {
        padding: 60px 0;
    }
    
    .contact-cta {
        padding: 60px 0;
    }
    
    .category-title {
        font-size: 20px;
        padding-left: 25px;
    }
    
    .timeline-content h3 {
        font-size: 20px;
    }
    
    .cta-content h2 {
        font-size: 28px;
    }
}