.about{max-width:var(--width-reading);padding:var(--space-6) var(--space-4) var(--space-7);margin-inline:auto}.about p{margin:0 0 var(--space-3)}.about ul{margin:0 0 var(--space-3);padding-left:var(--space-4)}.about li{margin-bottom:var(--space-1)}.about-hero{margin-bottom:var(--space-7);padding-bottom:var(--space-6);border-bottom:1px solid var(--color-border);overflow:auto}.about-hero__avatar{float:right;width:4rem;height:4rem;margin-left:var(--space-3);margin-bottom:var(--space-3);object-fit:cover;border:1px solid var(--color-border);border-radius:50%}.about-hero__name{margin:0 0 var(--space-3);font-size:var(--font-size-2xl)}.about-hero__tagline{font-size:var(--font-size-lg)}@media (width>=640px){.about-hero__avatar{width:5rem;height:5rem}}@media (width>=1024px){.about-hero__name{font-size:var(--font-size-3xl)}}.about-section{margin-bottom:var(--space-7)}.stepper .about-section{margin-bottom:0}.about-section__kicker{margin:0 0 var(--space-1);color:var(--color-text-secondary);font-size:var(--font-size-sm);text-transform:uppercase;letter-spacing:.05em;font-weight:600}.about-section__heading{margin:0 0 var(--space-4);font-size:var(--font-size-xl);line-height:1.3}@media (width>=768px){.about-section__heading{font-size:var(--font-size-2xl)}}.about-subheading{margin:0 0 var(--space-1);font-size:var(--font-size-lg);line-height:1.3}.about blockquote{margin:var(--space-5) 0;padding-left:var(--space-4);border-left:2px solid var(--color-text);font-size:var(--font-size-lg);font-style:italic}.about blockquote footer{margin-top:var(--space-2);color:var(--color-text-secondary);font-size:var(--font-size-sm);font-style:normal}.about-diagram{margin:var(--space-4) 0;padding:var(--space-3) var(--space-4);border:1px solid var(--color-border);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:var(--font-size-sm);background:#fafafa;line-height:1.6;overflow-x:auto}.about-carousel{justify-content:center;align-items:center;gap:var(--space-2);margin:var(--space-4) auto 0;display:flex}.about-carousel__stage{perspective:1200px;width:28rem;height:18rem;position:relative;overflow:hidden}.about-carousel__track{width:100%;height:100%;transform-style:preserve-3d;margin:0;padding:0;list-style:none;position:relative}.about-carousel__slide{border:1px solid var(--color-border);opacity:0;cursor:pointer;border-radius:8px;width:16rem;height:16rem;transition:transform .4s cubic-bezier(.2,.8,.2,1),opacity .4s,box-shadow .4s;position:absolute;top:50%;left:50%;overflow:hidden;transform:translate(-50%,-50%)scale(.6)}.about-carousel__slide img{object-fit:cover;pointer-events:none;width:100%;height:100%;display:block}.about-carousel__slide.is-active{z-index:10;opacity:1;transform:translate(-50%,-50%)scale(1);box-shadow:0 12px 28px #00000024}.about-carousel__slide.is-prev{z-index:9;opacity:.7;transform:translate(-50%,-50%)translate(-48%)scale(.75)rotateY(30deg)}.about-carousel__slide.is-next{z-index:9;opacity:.7;transform:translate(-50%,-50%)translate(48%)scale(.75)rotateY(-30deg)}.about-carousel__slide--locked{visibility:hidden}.about-carousel__caption{margin:var(--space-2) 0 var(--space-3);color:var(--color-text-secondary);font-size:var(--font-size-sm);text-align:center}@media (width>=640px){.about-carousel__stage{width:40rem;height:22rem}.about-carousel__slide{width:22rem;height:22rem}}@media (prefers-reduced-motion:reduce){.about-carousel__slide{transition:none}}.about-video{margin:var(--space-4) 0 var(--space-5)}.about-video iframe{aspect-ratio:16/9;border:1px solid var(--color-border);width:100%;display:block}.about-video figcaption{margin-top:var(--space-2);color:var(--color-text-secondary);font-size:var(--font-size-sm)}.about-figure{margin:var(--space-4) 0 var(--space-5)}.about-figure img{border:1px solid var(--color-border);width:100%;height:auto;display:block}.about-figure figcaption{margin-top:var(--space-2);color:var(--color-text-secondary);font-size:var(--font-size-sm)}.about-figure__downloads{align-items:baseline;gap:var(--space-1) var(--space-3);margin-top:var(--space-2);font-size:var(--font-size-sm);flex-wrap:wrap;display:flex}.about-figure__downloads span{color:var(--color-text-secondary)}.about-books{gap:var(--space-3);margin:var(--space-4) 0 var(--space-3);grid-template-columns:repeat(3,1fr);max-width:40rem;padding:0;list-style:none;display:grid}.about-books li{margin-bottom:0}.about-books img{border:1px solid var(--color-border);width:100%;height:auto;display:block}.about-cta{font-weight:600}.about-links-row{gap:var(--space-3);margin-top:var(--space-4);flex-wrap:wrap;display:flex}