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@media(max-width:560px){.header-cta{font-size:0}.header-cta span{font-size:20px}.hero-grid{margin-top:25px}.hero-intro{font-size:17px}.hero-model svg{margin-left:-8px;width:calc(100% + 8px)}.method-list{grid-template-columns:1fr}.method-step{min-height:250px}.comparison-grid article{padding:26px 22px}.principles{grid-template-columns:1fr}.deliverables span{width:100%;border-right:0}.closing h2{font-size:48px}.site-header .brand-name{font-size:27px}}
.header-actions{display:flex;align-items:center;gap:24px}.language-control{position:relative}.language-control:after{content:"↓";position:absolute;right:9px;top:7px;font-size:9px;pointer-events:none}.language-control select{appearance:none;background:transparent;color:var(--ink);border:1px solid var(--line);border-radius:0;padding:7px 28px 7px 9px;font:500 10px var(--sans);letter-spacing:.08em;text-transform:uppercase;cursor:pointer}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}}
.hero .reveal{opacity:1;transform:none}
.definition #definition-title{grid-column:2}@media(max-width:900px){.definition #definition-title{grid-column:1}}
/* RC1 interaction and navigation polish */
.site-header{position:sticky;top:0;z-index:1000;background:rgba(242,240,233,.94);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);transition:box-shadow .2s ease,background-color .2s ease}
.site-header.is-scrolled{background:rgba(242,240,233,.98);box-shadow:0 8px 24px rgba(24,32,34,.07)}
main[id],section[id]{scroll-margin-top:112px}
.hero{padding-top:78px}
button.primary-cta,button.header-cta{font-family:inherit;border:0;cursor:pointer}
button.header-cta{background:transparent;border-bottom:1px solid var(--ink);border-radius:0;color:inherit}
button:focus-visible,a:focus-visible,select:focus-visible{outline:2px solid var(--blue);outline-offset:4px}
.contact-menu{position:fixed;z-index:2000;width:min(340px,calc(100vw - 24px));padding:8px;background:var(--paper-light);border:1px solid var(--line);box-shadow:0 20px 55px rgba(24,32,34,.18)}
.contact-menu[hidden]{display:none!important}
.contact-option{display:grid;grid-template-columns:38px 1fr;gap:12px;align-items:center;padding:14px 12px;color:var(--ink);transition:background-color .18s ease}
.contact-option+.contact-option{border-top:1px solid var(--line)}
.contact-option:hover,.contact-option:focus-visible{background:#e7e8e3;outline:none}
.contact-icon{display:grid;place-items:center;width:34px;height:34px;border:1px solid var(--line);font-size:15px}
.contact-option strong{display:block;font-size:13px;font-weight:600}
.contact-option small{display:block;margin-top:3px;color:#6b7577;font-size:11px;letter-spacing:.02em}
@media(max-width:900px){.hero{padding-top:50px}main[id],section[id]{scroll-margin-top:92px}}
@media(max-width:560px){.contact-menu{width:calc(100vw - 24px)}button.header-cta{font-size:0}button.header-cta span{font-size:20px}}
/* RC1 readability polish */
body{letter-spacing:.012em}
.brand-name{letter-spacing:-.015em}
.hero h1,.section-heading h2,.problem h2,.closing h2,.manifesto h2,.scope-intro h2,.definition #definition-title{letter-spacing:0}
/* RC2 typographic rhythm */
body{line-height:1.62;letter-spacing:.015em}
.hero h1,.section-heading h2,.problem h2,.closing h2,.manifesto h2,.scope-intro h2,.definition #definition-title{line-height:1.04;letter-spacing:.012em}
.hero h1>em,.section-heading h2>em,.problem h2>em,.closing h2>em,.manifesto h2>em,.scope-intro h2>em{display:block;margin-top:.16em;font-size:.76em;line-height:1.1;letter-spacing:.012em}
.method-step h3{line-height:1.2;letter-spacing:.014em}
.problem-copy>p{line-height:1.58;letter-spacing:.012em}
.problem-copy li,.method-step p{line-height:1.65}
.problem-statement,.method-conclusion,.scope-close,.scope-grid li,.comparison li,.expertise-note{letter-spacing:.012em}
.scope-grid li,.comparison li{line-height:1.3}
.manifesto-copy>p{line-height:1.55}
@media(max-width:900px){.hero h1,.section-heading h2,.problem h2,.closing h2,.manifesto h2,.scope-intro h2,.definition #definition-title{line-height:1.06}.hero h1>em,.section-heading h2>em,.problem h2>em,.closing h2>em,.manifesto h2>em,.scope-intro h2>em{margin-top:.18em;font-size:.78em}}
.definition{padding:100px 0;display:grid;grid-template-columns:.35fr 1.65fr;gap:60px;border-bottom:1px solid var(--line)}.definition-label{font-size:10px;text-transform:uppercase;letter-spacing:.16em;color:#778183;padding-top:12px}.definition>p{margin:0}.definition #definition-title{font:400 clamp(34px,4.1vw,60px)/1.12 var(--serif);letter-spacing:-.035em}.definition #definition-title em{color:var(--blue);font-weight:400}.definition-note{grid-column:2;font-size:15px;line-height:1.7;color:#667173;max-width:680px;border-top:1px solid var(--line);padding-top:20px}.engine-purpose{font:400 20px/1.5 var(--serif);max-width:700px;margin:25px auto 0;text-align:center;color:#657073}.comparison-close{font:400 24px/1.5 var(--serif);max-width:900px;margin:60px auto 0;text-align:center;color:#4f5b5d}@media(max-width:900px){.definition{padding:70px 0;grid-template-columns:1fr;gap:25px}.definition-note{grid-column:1}.definition #definition-title{font-size:clamp(34px,9vw,52px)}}
.scope-section{padding:120px 0}.scope-intro{display:grid;grid-template-columns:1.15fr .85fr;gap:100px;align-items:end;margin-bottom:80px}.scope-intro h2{font:400 clamp(48px,5.3vw,78px)/.98 var(--serif);letter-spacing:-.045em;margin:0}.scope-intro h2 em,.scope-close em{color:#a7bbc0;font-weight:400}.scope-intro p{font:400 23px/1.45 var(--serif);color:#b6c0c1;margin:0}.scope-grid{display:grid;grid-template-columns:1fr 1fr;border:1px solid rgba(255,255,255,.2)}.scope-grid article{padding:38px 44px}.scope-grid article+article{border-left:1px solid rgba(255,255,255,.2)}.scope-label{font-size:10px;text-transform:uppercase;letter-spacing:.15em;color:#93a0a2;border-bottom:1px solid rgba(255,255,255,.2);padding-bottom:18px;margin-bottom:20px}.scope-grid ul{list-style:none;padding:0;margin:0}.scope-grid li{padding:12px 0;border-bottom:1px solid rgba(255,255,255,.13);font:400 19px var(--serif)}.scope-grid article>p{color:#bac2c3;line-height:1.7}.domain-list{display:flex;flex-wrap:wrap;margin-top:30px}.domain-list span{font-size:10px;text-transform:uppercase;letter-spacing:.1em;padding:10px 14px;border:1px solid rgba(255,255,255,.2);margin:-1px 0 0 -1px}.scope-close{font:400 clamp(28px,3.5vw,48px)/1.2 var(--serif);max-width:920px;margin:90px 0 0 auto}.expertise-note{font:400 23px/1.5 var(--serif);max-width:850px;margin:70px 0 0;color:#aeb9ba}@media(max-width:900px){.scope-section{padding:80px 0}.scope-intro,.scope-grid{grid-template-columns:1fr;gap:40px}.scope-grid article+article{border-left:0;border-top:1px solid rgba(255,255,255,.2)}}

/* RC2 final cascade normalization */
.scope-intro h2{line-height:1.04;letter-spacing:.012em}
.definition #definition-title{line-height:1.16;letter-spacing:.012em}
@media(max-width:900px){.scope-intro h2{line-height:1.06}.definition #definition-title{line-height:1.18}}