.cs-journey-nav{display:flex;flex-wrap:wrap;gap:12px 25px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:16px 0;margin:0 0 34px;font-size:12px}
.cs-journey-nav a{min-height:30px;display:flex;align-items:center;gap:8px}.cs-journey-nav a span{color:var(--muted)}.cs-journey-nav a:hover{text-decoration:underline;text-underline-offset:4px}
.cs-prototype-section{display:grid;grid-template-columns:1fr 1.35fr;gap:60px;align-items:center}
.cs-prototype-copy>p{font-size:15px;line-height:1.8;color:var(--muted);margin-top:24px}
.cs-prototype{background:var(--soft);padding:18px}
.cs-prototype-options{display:flex;gap:5px;margin-bottom:16px}.cs-prototype-options button{font-size:12px;padding:9px 12px;min-height:40px;border:1px solid var(--line);border-radius:4px}.cs-prototype-options button[aria-pressed=true]{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.cs-prototype-viewport{position:relative;aspect-ratio:1.44;overflow:hidden;background:var(--paper);border:1px solid var(--line)}
.cs-prototype-viewport>img{width:100%;height:100%;position:absolute;inset:0;object-fit:cover;object-position:top;opacity:0;transition:opacity .45s}
.cs-prototype[data-prototype-state=design] .cs-prototype-viewport>img{opacity:1}
.cs-prototype-wireframe{padding:5%;height:100%;display:flex;flex-direction:column;gap:7%;color:var(--muted)}
.cs-prototype-wireframe>div:first-child{display:flex;justify-content:space-between;padding-bottom:3%;border-bottom:1px solid var(--line);font-size:10px}
.cs-prototype-wireframe strong{font-size:clamp(22px,3vw,42px);font-weight:450;letter-spacing:-.045em;line-height:1.15}
.cs-prototype-wireframe .cs-wire-image{flex:1;border:1px solid var(--line);position:relative;display:grid;place-items:center;font-size:11px;min-height:30px;background:linear-gradient(to top right,transparent calc(50% - .5px),var(--line) 50%,transparent calc(50% + .5px)),linear-gradient(to bottom right,transparent calc(50% - .5px),var(--line) 50%,transparent calc(50% + .5px))}
.cs-wire-image span{padding:6px;background:var(--paper)}
.cs-wire-footer{display:flex;justify-content:space-between;gap:15px;font-size:11px}
.cs-prototype>p{font-size:12px;color:var(--muted);margin-top:12px;line-height:1.65}
.cs-measurement h2{max-width:750px}.cs-measurement>p{font-size:15px;color:var(--muted);max-width:620px;margin-top:22px}
.cs-measurement dl{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px;margin:35px 0 0}.cs-measurement dl>div{border-top:1px solid var(--line);padding-top:20px}.cs-measurement dt{font-size:20px;letter-spacing:-.025em}.cs-measurement dd{font-size:14px;line-height:1.8;color:var(--muted);margin:13px 0 0}
.cs-measurement .cs-measurement-note{font-size:12px;max-width:850px;margin-top:30px}
.cs-chapter>.eyebrow{margin-bottom:24px}
@media(max-width:800px){.cs-prototype-section{grid-template-columns:1fr;gap:28px}.cs-prototype-copy>p{max-width:600px}.cs-measurement dl{gap:22px}.cs-prototype-wireframe strong{font-size:38px}}
@media(max-width:540px){.cs-journey-nav{gap:8px 18px;margin-bottom:24px}.cs-prototype{padding:12px}.cs-prototype-copy>p{font-size:14px}.cs-prototype-wireframe strong{font-size:26px}.cs-prototype-options button{padding:9px 10px;font-size:12px}.cs-measurement dl{grid-template-columns:1fr;gap:23px}.cs-measurement>p{font-size:14px}.cs-measurement dd{margin-top:8px}}
@media(prefers-reduced-motion:reduce){.cs-prototype-viewport>img{transition:none}}