.portfolio-filters{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;margin-bottom:3rem}.filter-btn{padding:.75rem 1.5rem;background:var(--bg-card);border:1px solid var(--border-color);border-radius:.5rem;color:var(--text-tertiary);cursor:pointer;transition:all .3s ease;font-size:.95rem;font-weight:500}.filter-btn.active,.filter-btn:hover{background:var(--accent-blue);border-color:var(--accent-blue);color:var(--text-white)}.portfolio-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));grid-gap:2rem;gap:2rem}.portfolio-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:1.5rem;overflow:hidden;transition:all .3s ease}.portfolio-card:hover{transform:translateY(-5px);border-color:var(--accent-blue);box-shadow:0 10px 30px rgba(59,130,246,.2)}.portfolio-image{background:linear-gradient(135deg,var(--gradient-start),var(--gradient-end));height:200px}.portfolio-icon,.portfolio-image{display:flex;align-items:center;justify-content:center}.portfolio-icon{width:80px;height:80px;color:#fff}.portfolio-icon svg{width:100%;height:100%;opacity:.9}.portfolio-content{padding:2rem}.portfolio-header{display:flex;gap:.75rem;flex-wrap:wrap;margin-bottom:.75rem;align-items:center}.portfolio-category{display:inline-block;font-size:.875rem;color:var(--accent-blue);font-weight:600;text-transform:uppercase;letter-spacing:.05em}.portfolio-sector{display:inline-block;font-size:.75rem;color:var(--text-tertiary);font-weight:500;padding:.25rem .75rem;background:var(--bg-secondary);border-radius:.375rem;text-transform:capitalize}.portfolio-title{font-size:1.5rem;margin-bottom:1rem;color:var(--text-primary)}.portfolio-description{color:var(--text-tertiary);line-height:1.6;margin-bottom:1.5rem}.portfolio-technologies{display:flex;flex-wrap:wrap;gap:.5rem}.portfolio-highlights{margin:1.5rem 0;padding:1.25rem;background:var(--bg-secondary);border-radius:.75rem;border-left:3px solid var(--accent-blue)}.highlights-title{font-size:.95rem;font-weight:700;color:var(--text-primary);margin-bottom:.75rem;text-transform:uppercase;letter-spacing:.05em}.highlights-list{list-style:none;padding:0;margin:0}.highlights-list li{font-size:.9rem;color:var(--text-secondary);line-height:1.6;margin-bottom:.5rem;padding-left:1.25rem;position:relative}.highlights-list li:before{content:"✓";position:absolute;left:0;color:var(--accent-blue);font-weight:700}.highlights-list li:last-child{margin-bottom:0}.tech-tag{padding:.375rem .75rem;background:rgba(59,130,246,.2);border:1px solid rgba(59,130,246,.3);border-radius:.375rem;font-size:.875rem;color:var(--accent-light)}.portfolio-link{display:inline-flex;align-items:center;gap:.5rem;margin-top:1.5rem;padding:.75rem 1.5rem;background:var(--accent-blue);color:#fff;text-decoration:none;border-radius:.5rem;font-weight:600;font-size:.95rem;transition:all .3s ease}.portfolio-link:hover{background:var(--accent-light);transform:translateX(4px)}@media (max-width:768px){.portfolio-grid{grid-template-columns:1fr}.portfolio-filters{gap:.5rem}.filter-btn{padding:.5rem 1rem;font-size:.875rem}}