.how-we-built-it{padding:3rem 0;min-height:100vh}.build-header{display:flex;justify-content:space-between;align-items:center;gap:2rem;margin-bottom:3rem;padding:2.5rem;background:linear-gradient(135deg,#1e293b,#334155);border-radius:var(--radius-xl);color:#fff}.build-header h1{color:#fff;margin-bottom:.5rem}.build-intro{font-size:1.2rem;color:#ffffffd9;margin:0}.build-mascot{flex-shrink:0}.build-section{margin-bottom:3rem}.build-section h2{color:var(--color-text);margin-bottom:1rem;font-size:1.75rem;border-bottom:2px solid var(--color-primary);padding-bottom:.5rem;display:inline-block}.section-intro{color:var(--color-text-light);font-size:1.1rem;margin-bottom:1.5rem}.section-note{color:var(--color-text-light);font-size:.95rem;margin-top:1.5rem;font-style:italic}.tech-stack-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}.tech-card{background:var(--color-card);border:2px solid var(--color-border-light);border-radius:var(--radius-lg);padding:1.5rem;transition:all var(--transition-normal)}.tech-card:hover{border-color:var(--color-primary);transform:translateY(-2px)}.tech-card h3{color:var(--color-primary);font-size:.9rem;text-transform:uppercase;letter-spacing:.05em;margin-bottom:.5rem}.tech-card p{margin:0;color:var(--color-text);font-weight:700;font-size:1.1rem}.tech-note{color:var(--color-text-light)!important;font-weight:400!important;font-size:.9rem!important;margin-top:.5rem!important}.pipeline-flow{display:flex;align-items:flex-start;gap:1rem;flex-wrap:wrap}.pipeline-step{flex:1;min-width:250px;background:var(--color-card);border:2px solid var(--color-border-light);border-radius:var(--radius-lg);padding:1.5rem;position:relative}.step-num{position:absolute;top:-12px;left:20px;width:28px;height:28px;background:var(--color-primary);color:#fff;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.9rem}.pipeline-step h3{margin-top:.5rem;margin-bottom:.75rem;font-size:1.1rem}.pipeline-step p{color:var(--color-text-light);font-size:.95rem;margin:0;line-height:1.6}.pipeline-arrow{font-size:2rem;color:var(--color-primary);font-weight:700;align-self:center}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-bottom:1rem}.stat-card{background:var(--color-primary-bg);border-radius:var(--radius-lg);padding:1.5rem;text-align:center}.stat-num{display:block;font-size:1.75rem;font-weight:800;color:var(--color-primary);margin-bottom:.25rem}.stat-label{color:var(--color-text-light);font-size:.9rem;font-weight:600}.ocr-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}.ocr-card{background:var(--color-card);border:2px solid var(--color-border-light);border-radius:var(--radius-lg);padding:1.5rem}.ocr-card h3{margin-bottom:.5rem;font-size:1.1rem}.ocr-model{display:inline-block;background:var(--color-primary);color:#fff;padding:.25rem .75rem;border-radius:var(--radius-full);font-size:.85rem;font-weight:700;margin-bottom:.75rem}.ocr-card p{color:var(--color-text-light);font-size:.95rem;margin:0;line-height:1.5}.observations-list{display:flex;flex-direction:column;gap:1rem}.observation{display:flex;gap:1rem;background:var(--color-card);border:1px solid var(--color-border-light);border-radius:var(--radius-lg);padding:1.25rem}.obs-icon{font-size:1.5rem;flex-shrink:0}.observation strong{display:block;margin-bottom:.25rem;color:var(--color-text)}.observation p{color:var(--color-text-light);font-size:.95rem;margin:0}.subject-breakdown{margin-top:1.5rem;padding:1.25rem;background:var(--color-card);border:1px solid var(--color-border-light);border-radius:var(--radius-lg)}.subject-breakdown h3{font-size:.95rem;color:var(--color-text);margin-bottom:.75rem}.subject-stats{display:flex;flex-wrap:wrap;gap:1rem 2rem}.subject-stats span{color:var(--color-text-light);font-size:.95rem}.subject-stats strong{color:var(--color-primary);font-weight:700}.lessons-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}.lesson-card{background:var(--color-bg-secondary);border-radius:var(--radius-lg);padding:1.5rem}.lesson-card h3{font-size:1.05rem;margin-bottom:.5rem;color:var(--color-text)}.lesson-card p{color:var(--color-text-light);font-size:.95rem;margin:0;line-height:1.5}.open-source-section{background:var(--color-primary-bg);padding:2rem;border-radius:var(--radius-xl);text-align:center}.open-source-section h2{border-bottom:none;display:block}.open-source-section p{color:var(--color-text-light);font-size:1.1rem;margin:0}.contact-section{text-align:center;padding:2.5rem;background:var(--color-bg-secondary);border-radius:var(--radius-xl)}.contact-section h2{margin-bottom:.5rem}.contact-section>p{color:var(--color-text-light);margin-bottom:1.5rem}.contact-section .btn{margin-bottom:1rem}.contact-email{font-size:.9rem;color:var(--color-text-lighter);margin:0}@media(max-width:1024px){.build-header{flex-direction:column;text-align:center}.tech-stack-grid{grid-template-columns:1fr}.pipeline-flow{flex-direction:column}.pipeline-arrow{transform:rotate(90deg);align-self:center}.stats-grid,.ocr-grid,.lessons-grid{grid-template-columns:1fr}}@media(max-width:768px){.how-we-built-it{padding:2rem 0}.build-header{padding:1.5rem}.build-section h2{font-size:1.5rem}.pipeline-step{min-width:100%}.contact-section{padding:2rem 1.5rem}}