.walkthrough-shell{width:100%;max-width:1440px;margin:0 auto;padding:3rem var(--gutter) 5rem}.walkthrough-intro{max-width:1000px;margin-bottom:2rem}.walkthrough-intro h1{max-width:1000px;margin:.7rem 0 1rem;font-size:clamp(2.8rem,5vw,4.25rem);line-height:.98;letter-spacing:-.06em}.walkthrough-intro>p:not(.eyebrow):not(.walkthrough-voice){max-width:660px;color:var(--text-secondary);font-size:1.05rem;line-height:1.7}.walkthrough-voice{display:flex;align-items:flex-start;gap:.6rem;margin:1.4rem 0;color:var(--text-secondary);font-size:.88rem;line-height:1.55}.walkthrough-voice span{width:.48rem;height:.48rem;margin-top:.38rem;border-radius:50%;flex:none;background:var(--accent)}.walkthrough-back{display:inline-flex;color:var(--accent-text);font-weight:700;text-decoration:none;text-underline-offset:.25em}.walkthrough-back:hover{text-decoration:underline}.walkthrough-player{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:1.5rem;align-items:start}.walkthrough-video-wrap{border:1px solid var(--border-color);border-radius:0;overflow:hidden;background:#0d1513;box-shadow:var(--shadow)}.walkthrough-video-wrap video{display:block;width:100%;height:auto;aspect-ratio:16/9;background:#0d1513}.walkthrough-now{border-top:3px solid var(--accent);padding-top:1rem}.walkthrough-now>p:first-child{margin:0;color:var(--text-muted);font-size:.72rem;font-weight:800;letter-spacing:.1em}.walkthrough-now h2{margin:1rem 0 .75rem;font-size:1.5rem;line-height:1.15;letter-spacing:-.035em}.walkthrough-now>p:last-child{margin:0;color:var(--text-secondary);font-size:.95rem;line-height:1.65}.walkthrough-chapters{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin-top:1.5rem;border-top:1px solid var(--border-color);border-left:1px solid var(--border-color)}.walkthrough-chapters button{display:grid;grid-template-columns:1.75rem minmax(0,1fr) 2.5rem;gap:.5rem;min-height:4.5rem;padding:.8rem;border:0;border-right:1px solid var(--border-color);border-bottom:1px solid var(--border-color);background:var(--bg-surface);color:var(--text-primary);font:inherit;text-align:left;cursor:pointer}.walkthrough-chapters button:hover{background:var(--bg-hover)}.walkthrough-chapters button[aria-current=step]{background:var(--text-primary);color:var(--bg-base)}.walkthrough-chapters small,.walkthrough-chapters span{color:var(--text-muted);font-size:.68rem;font-variant-numeric:tabular-nums}.walkthrough-chapters button[aria-current=step] small,.walkthrough-chapters button[aria-current=step] span{color:color-mix(in srgb,var(--bg-base) 74%,transparent)}.walkthrough-chapters strong{font-size:.78rem;font-weight:700;line-height:1.35}.walkthrough-transcript{margin-top:2rem;border-block:1px solid var(--border-color);padding:1rem 0 1.5rem}.walkthrough-transcript summary{cursor:pointer;color:var(--text-primary);font-weight:800}.walkthrough-language-note{margin:1rem 0 0;color:var(--text-muted);font-size:.82rem}.walkthrough-transcript>div{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem 3rem;padding-top:1rem}.walkthrough-transcript section{border-top:1px solid var(--line);padding-top:1rem}.walkthrough-transcript h2{display:flex;gap:.8rem;color:var(--accent-text);font-size:.76rem;letter-spacing:.06em}.walkthrough-transcript h2 span{color:var(--text-primary);letter-spacing:0}.walkthrough-transcript section p{margin:.55rem 0 0;color:var(--text-secondary);font-size:.94rem;line-height:1.7}@media (max-width:980px){.walkthrough-player{grid-template-columns:1fr}.walkthrough-now{display:grid;grid-template-columns:210px 1fr;gap:0 1.5rem}.walkthrough-now>p:first-child{grid-column:1/-1}.walkthrough-now h2{margin-bottom:0}.walkthrough-now>p:last-child{margin-top:1rem}.walkthrough-chapters{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:600px){.walkthrough-shell{width:100%;padding-top:2rem}.walkthrough-intro h1{font-size:clamp(2.55rem,13vw,4rem)}.walkthrough-intro>p:not(.eyebrow):not(.walkthrough-voice){font-size:.98rem}.walkthrough-now{display:block}.walkthrough-now h2{font-size:1.35rem;margin-bottom:.7rem}.walkthrough-chapters button{grid-template-columns:1.25rem minmax(0,1fr);gap:.35rem;padding:.75rem .65rem}.walkthrough-chapters small{grid-column:2}.walkthrough-chapters strong{font-size:.72rem}.walkthrough-transcript>div{display:block}.walkthrough-transcript section+section{margin-top:1.2rem}}