.expertise-section{background:0 0;min-height:100vh;padding:6rem 0 4rem}.expertise-container{max-width:1200px;margin:0 auto;padding:0 2rem}.expertise-header{text-align:center;margin-bottom:4rem}.expertise-header h1{background:linear-gradient(135deg,var(--text-main)0%,var(--text-dim)100%);-webkit-text-fill-color:transparent;letter-spacing:-.04em;-webkit-background-clip:text;background-clip:text;margin-bottom:1rem;font-size:clamp(2.5rem,8vw,4rem);font-weight:800}.expertise-header p{color:var(--text-muted);max-width:600px;margin:0 auto;font-size:1.15rem;line-height:1.6}.sub-section-header{text-align:center;margin:3rem 0 1.5rem;position:relative}.sub-section-header h2{color:var(--text-main);letter-spacing:-.02em;font-size:2rem;font-weight:700;display:inline-block;position:relative}.sub-section-header .header-line{background:var(--accent-primary);border-radius:2px;width:60px;height:4px;margin:.75rem auto 0}.skills-grid{grid-template-columns:repeat(4,1fr);gap:2rem;margin-bottom:4rem;display:grid}@media (max-width:1100px){.skills-grid{grid-template-columns:repeat(3,1fr)}}@media (max-width:992px){.skills-grid{grid-template-columns:repeat(2,1fr)}}.skill-category h3{color:var(--text-main);margin-bottom:1.25rem;font-size:1.25rem;font-weight:600}.tech-tags{flex-wrap:wrap;gap:.6rem;display:flex}.tech-tag{font-family:var(--font-mono);color:var(--text-muted);-webkit-backdrop-filter:blur(8px);letter-spacing:.02em;background:#0f172a4d;border:1px solid #ffffff0d;border-radius:4px;padding:.4rem .8rem;font-size:.75rem;transition:all .3s cubic-bezier(.4,0,.2,1)}.tech-tag:hover{color:var(--accent-primary);background:#0f172a80;border-color:#38bdf84d;transform:translateY(-2px);box-shadow:0 4px 12px #0000004d}.expertise-grid{grid-template-columns:repeat(3,1fr);gap:1.25rem;max-width:1100px;margin:0 auto;display:grid}.expertise-card{-webkit-backdrop-filter:blur(12px);background:#0f172a66;border:1px solid #ffffff14;border-radius:12px;align-items:flex-start;gap:1.25rem;padding:1.5rem;transition:all .4s cubic-bezier(.4,0,.2,1);display:flex;box-shadow:0 4px 6px -1px #0000001a}.expertise-card:hover{border-color:var(--accent-primary);background:#0f172a99;transform:translateY(-5px);box-shadow:0 20px 25px -5px #0003}.expertise-icon{color:var(--accent-primary);opacity:.8}.expertise-content h3{color:var(--text-main);margin-bottom:.5rem;font-size:1.1rem;font-weight:600}.expertise-content p{color:var(--text-muted);font-size:.9rem;line-height:1.5}.timeline{max-width:800px;margin:0 auto;padding-left:2rem;position:relative}.timeline:before{content:"";background:var(--border-subtle);width:2px;height:100%;position:absolute;top:0;left:0}.timeline-item{margin-bottom:3rem;position:relative}.timeline-dot{background:var(--bg-main);border:2px solid var(--accent-primary);z-index:2;border-radius:50%;width:12px;height:12px;position:absolute;top:.5rem;left:-2.4rem}.timeline-content{-webkit-backdrop-filter:blur(10px);background:#0f172a4d;border:1px solid #ffffff0f;border-radius:12px;padding:1.75rem;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 6px -1px #0000001a}.timeline-content:hover{border-color:var(--accent-primary);background:#0f172a80;transform:translate(5px);box-shadow:0 10px 15px -3px #0003}.timeline-date{font-family:var(--font-mono);color:var(--accent-primary);margin-bottom:.75rem;font-size:.85rem;display:block}.timeline-title{color:var(--text-main);margin-bottom:.25rem;font-size:1.4rem;font-weight:700}.timeline-company{color:var(--text-dim);margin-bottom:1.25rem;font-size:1.1rem;font-weight:500}.timeline-desc ul{padding:0;list-style:none}.timeline-desc li{color:var(--text-muted);margin-bottom:.75rem;padding-left:1.5rem;font-size:.95rem;line-height:1.6;position:relative}.timeline-desc li:before{content:"→";color:var(--accent-primary);position:absolute;left:0}.timeline-tags{flex-wrap:wrap;gap:.5rem;margin-top:1.5rem;display:flex}.timeline-tags span{color:var(--text-muted);border:1px solid var(--border-subtle);background:#94a3b80d;border-radius:4px;padding:.25rem .75rem;font-size:.75rem}.education-grid{grid-template-columns:1fr;gap:1.5rem;max-width:800px;margin:0 auto;display:grid}.education-card{-webkit-backdrop-filter:blur(12px);background:#0f172a66;border:1px solid #ffffff14;border-radius:16px;gap:1.5rem;padding:2rem;transition:all .4s cubic-bezier(.4,0,.2,1);display:flex;box-shadow:0 4px 6px -1px #0000001a}.education-card:hover{border-color:var(--accent-primary);background:#0f172a99;transform:translateY(-5px);box-shadow:0 20px 25px -5px #0003}.education-content h3{color:var(--text-main);margin-bottom:.4rem;font-size:1.2rem;font-weight:600}.edu-school{color:var(--accent-primary);margin-bottom:.75rem;font-weight:500}.edu-meta{color:var(--text-muted);font-size:.85rem;font-family:var(--font-mono);gap:1.5rem;margin-bottom:1rem;display:flex}.expertise-cta{text-align:center;border-top:1px solid var(--border-light);max-width:800px;margin-top:3.5rem;margin-left:auto;margin-right:auto;padding:2.5rem 0 2rem}.expertise-cta h2{color:var(--text-main);letter-spacing:-.04em;margin-bottom:.75rem;font-size:2.25rem;font-weight:700}.expertise-cta p{color:var(--text-dim);max-width:480px;margin-bottom:2rem;margin-left:auto;margin-right:auto;font-size:1.05rem;line-height:1.6}.cta-buttons{justify-content:center;align-items:center;gap:1.25rem;display:flex}.btn-sleek{cursor:pointer;border-radius:8px;align-items:center;gap:.5rem;padding:.65rem 1.6rem;font-size:.875rem;font-weight:500;transition:all .3s cubic-bezier(.4,0,.2,1);display:flex}.btn-sleek-primary{background:var(--text-main);color:var(--bg-dark);border:1px solid var(--text-main)}.btn-sleek-primary:hover{background:var(--accent-secondary);color:#fff;border-color:var(--accent-secondary);transform:translateY(-3px)}.btn-sleek-secondary{color:var(--text-main);border:1px solid var(--border-light);background:0 0}.btn-sleek-secondary:hover{border-color:var(--text-main);background:#94a3b80d;transform:translateY(-3px)}@media (max-width:992px){.expertise-header{margin-bottom:4rem}.skills-grid,.expertise-grid{grid-template-columns:repeat(2,1fr)}.education-grid{grid-template-columns:1fr}}@media (max-width:768px){.skills-grid{grid-template-columns:1fr;gap:2rem}.expertise-grid{grid-template-columns:1fr}.education-card{flex-direction:column;padding:1.5rem}.cta-buttons{flex-direction:column;gap:.75rem;width:100%;max-width:320px;margin-left:auto;margin-right:auto}.cta-buttons .btn-sleek{justify-content:center;width:100%}.expertise-cta{margin-top:4rem;padding:4rem 1.5rem}.expertise-cta h2{font-size:1.75rem}}