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(max-width:900px){.hero-inner{grid-template-columns:1fr}.hero h1{font-size:2.6rem}.hero-visual{order:-1}.hero-terminal{max-width:340px}.phil-grid{grid-template-columns:1fr}.skills-grid{grid-template-columns:repeat(2,1fr)}.proj-grid{grid-template-columns:1fr}.proj-card.featured{grid-column:span 1;grid-template-columns:1fr}.testimonial-carousel-container{height:320px}.testimonial-carousel{max-width:100%}.cert-row{flex-direction:column}}@media (max-width:768px){.skills-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width:500px){.hero-stats{flex-wrap:wrap;gap:1.5rem}.skills-grid{grid-template-columns:1fr}.chat-container{width:95%;height:80vh;max-width:100%;border-radius:12px;margin:0 auto 2rem;right:auto;left:auto}.messages-container{padding:1rem}.message-content{max-width:100%}.message-input{font-size:16px}.question-chip{font-size:.78rem;padding:.6rem .8rem}}