/* Engineering Field Guide: editorial hierarchy, system boundaries, no bitmap assets. */
@media(min-width:1081px){.menu-toggle{display:none}}
#main-nav a{min-width:44px;justify-content:center}
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.hero{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:48px;align-items:center;padding:80px 0 72px;border-bottom:1px solid var(--line)}.hero-home{grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:60px;padding:84px 0 80px}.kicker{font:500 12px/1.8 var(--mono);letter-spacing:.09em;text-transform:uppercase;color:var(--accent);margin-bottom:22px}.lede{font-size:clamp(1.1rem,1.7vw,1.25rem);line-height:1.7;color:var(--muted);margin-top:28px;max-width:57ch}.page-rule{height:220px;min-width:120px;border-left:1px solid var(--line);display:flex;align-items:flex-end;padding-left:24px}.page-rule span{font:14px var(--mono);color:var(--muted)}.topology{background:var(--tint);border:1px solid var(--line);padding:26px;max-width:100%;font-size:14px;line-height:1.55}.figure-heading{font-weight:600;display:flex;gap:10px;align-items:center;margin-bottom:25px}.signal{width:9px;height:9px;background:var(--accent);display:inline-block;flex-shrink:0}.model-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.model-row span{padding:12px 6px;border:1px solid var(--line);background:var(--paper);text-align:center;font-size:12px;line-height:1.6}.connector{text-align:center;color:var(--accent);height:30px;font-size:19px;line-height:30px}.agent-node,.systems-node{border:1px solid var(--line);background:var(--paper);padding:12px;text-align:center}.boundary{background:var(--ink);color:var(--white);padding:22px 18px}.boundary>strong{display:block;font:500 13px/1.6 var(--mono);text-align:center;letter-spacing:.05em}.boundary ul{padding:0;list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px 5px;margin-top:20px}.boundary li{text-align:center;font-size:12px}.figure-note{color:var(--ink);font-weight:600;margin-top:22px}figcaption{color:var(--muted);font-size:12px;margin-top:12px}.content-section{padding:80px 0;border-bottom:1px solid var(--line)}.section-heading{margin-bottom:36px}.section-heading>p:not(.kicker){color:var(--muted);margin-top:22px}.section-statement .section-heading{display:grid;grid-template-columns:1fr 1fr;gap:12px 60px;margin:0}.section-statement .kicker{grid-column:1/-1;margin:0 0 10px}.section-statement .section-heading>p:not(.kicker){margin:0}.items{padding:0;list-style:none}.items li{min-width:0}.item-index{color:var(--accent);font:13px/1.6 var(--mono);padding-top:4px}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line)}.cards li{padding:28px 28px 8px 0}.cards li+li{border-left:1px solid var(--line);padding-left:28px}.cards h3{margin:12px 0}.items p{font-size:16px;color:var(--muted)}.ledger li{display:grid;grid-template-columns:42px minmax(0,1fr);border-top:1px solid var(--line);padding:26px 0;gap:18px}.ledger li>div{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.4fr);gap:40px}.ledger h3{max-width:30ch}.exceptions{border-top:1px solid var(--line)}.exceptions li{display:grid;grid-template-columns:30px 1fr;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}.exceptions li>div{display:grid;grid-template-columns:1fr 1fr;gap:35px}.exceptions h3{font-size:17px}.exceptions li:last-child{border-bottom:0}.progress-section{padding:64px 0;border-bottom:1px solid var(--line)}.progression{padding:0;list-style:none;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));border:1px solid var(--line)}.progression li{padding:20px 14px;font-size:14px;line-height:1.55}.progression li+li{border-left:1px solid var(--line)}.progression span{display:block;font:12px var(--mono);color:var(--accent);margin-bottom:14px}.progression .human-step{background:var(--tint);font-weight:650}.service-link{padding-top:18px}.flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.flow li{border-left:2px solid var(--accent);padding:8px 20px;background:var(--tint)}.flow h3{margin:6px 0}.flow .item-index{display:block}.section-architecture .topology{max-width:720px;margin:auto}.section-founder{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:45px;align-items:end}.section-founder .section-heading{margin:0}.founder-links{display:flex;flex-direction:column;min-width:130px}.governance-teaser{display:flex;justify-content:space-between;align-items:center;gap:30px;padding:42px 0;border-bottom:1px solid var(--line)}.governance-teaser p{font-size:23px;font-weight:600}.cta{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:64px;align-items:center;padding:68px 0}.cta p{color:var(--muted);margin-top:22px;max-width:60ch}.site-footer{background:var(--tint);border-top:1px solid var(--line);padding:48px 0}.footer-grid{display:grid;grid-template-columns:1.2fr 1fr .8fr;gap:40px}.site-footer p{font-size:14px;color:var(--muted);margin-top:14px}.site-footer h2{font-size:16px;line-height:1.7;margin-bottom:12px;letter-spacing:0}.site-footer .text-link{display:flex;font-size:14px}.legal{font-size:12px!important}
.demo{background:var(--tint);border:1px solid var(--line);padding:32px}.demo>p{margin-top:18px;font-size:16px}.identity-row{display:grid;grid-template-columns:1fr 1fr;gap:22px;border-block:1px solid var(--line);padding:22px 0;margin:24px 0}.identity-row dt{font-size:13px;color:var(--muted)}.identity-row dd{margin:6px 0 0}.demo-interactive .operation{margin-top:20px}#approval-label{margin-top:18px;font-size:14px}.demo-status{padding:20px;border-left:4px solid var(--accent);background:var(--paper);font-weight:600;overflow-wrap:anywhere}.demo-status[data-state=denied]{border-color:var(--focus)}.demo-evidence,.static-explanation{color:var(--muted)}.contact-layout{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.3fr);gap:64px}.contact-aside p{font-size:16px;margin-top:20px;color:var(--muted)}.contact-aside>.text-link{font-size:14px}.field-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px}label{display:block;font-size:15px;font-weight:600;margin-bottom:20px}input,textarea,select{display:block;width:100%;min-width:0;min-height:48px;margin-top:8px;background:var(--white);color:var(--ink);border:1px solid var(--muted);border-radius:2px;padding:11px;font-size:16px;line-height:1.7}textarea{resize:vertical}input:focus,textarea:focus,select:focus{outline:3px solid var(--focus);outline-offset:2px}.hint{font-size:14px;color:var(--muted);margin:-3px 0 24px}.form-status{margin-top:24px;font-size:15px}.draft-panel{margin-top:24px;padding-top:24px;border-top:1px solid var(--line)}.email-draft{font-size:15px;white-space:pre-wrap}.draft-panel .actions{margin-top:14px}
html[lang=th] h1{font-size:clamp(2.2rem,4.1vw,3.65rem);line-height:1.4;letter-spacing:-.025em;max-width:22ch}html[lang=th] h2{line-height:1.5;letter-spacing:0}html[lang=th] h3{line-height:1.65;letter-spacing:0}html[lang=th] .kicker,html[lang=th] .boundary>strong{letter-spacing:0;text-transform:none}html[lang=th] .lede{line-height:1.9}html[lang=th] .progression li{line-height:1.85}
@media(max-width:1150px){.header-inner{gap:16px;width:calc(100% - 40px)}#main-nav{gap:11px}#main-nav a{font-size:13px}.hero-home{gap:36px}.wrap{width:calc(100% - 64px)}}
@media(max-width:1080px){.header-inner{display:grid;grid-template-columns:1fr auto auto;padding-block:12px;min-height:72px}.menu-toggle{grid-column:2}.language{grid-column:3;grid-row:1}#main-nav{grid-column:1/-1;grid-row:2;flex-wrap:wrap;gap:8px 24px}#main-nav a{font-size:15px}.menu-ready #main-nav{display:none}.menu-ready.menu-open #main-nav{display:flex}.hero-home{grid-template-columns:1fr 1fr;gap:28px}.hero-home h1{font-size:clamp(2.6rem,5.1vw,3.3rem)}.topology{padding:18px}.model-row{gap:4px}.boundary{padding:18px 9px}.page-rule{min-width:80px}.cta{grid-template-columns:1fr;gap:30px}.cta .button{justify-self:start}.footer-grid{gap:24px}.contact-layout{gap:32px}.progression{grid-template-columns:repeat(3,minmax(0,1fr))}.progression li:nth-child(4){border-left:0}.progression li:nth-child(n+4){border-top:1px solid var(--line)}}
@media(max-width:760px){.wrap{width:calc(100% - 40px)}.hero,.hero-home{grid-template-columns:1fr;gap:40px;padding:48px 0}.hero-home h1{font-size:clamp(2.65rem,8vw,3.5rem)}.hero .topology{max-width:540px;width:100%}.page-rule{display:none}.kicker{font-size:11px;margin-bottom:18px}.content-section{padding:48px 0}.section-heading{margin-bottom:26px}.section-statement .section-heading{display:block}.section-statement .section-heading>p:not(.kicker){margin-top:22px}.cards{grid-template-columns:1fr}.cards li,.cards li+li{padding:24px 0;border-left:0;border-bottom:1px solid var(--line)}.cards li:last-child{border-bottom:0}.cards h3{margin:6px 0 12px}.ledger li{grid-template-columns:26px 1fr;gap:12px}.ledger li>div{grid-template-columns:1fr;gap:12px}.exceptions li>div{grid-template-columns:1fr;gap:8px}.flow{grid-template-columns:1fr 1fr}.section-founder{grid-template-columns:1fr;gap:24px}.founder-links{flex-direction:row;flex-wrap:wrap;gap:25px}.progress-section{padding:48px 0}.governance-teaser{flex-direction:column;align-items:flex-start}.cta{padding:48px 0}.footer-grid{grid-template-columns:1fr;gap:32px}.contact-layout{grid-template-columns:1fr;gap:36px}.demo{padding:22px 18px}.identity-row{grid-template-columns:1fr;gap:15px}.field-row{grid-template-columns:1fr;gap:0}.demo .actions{gap:12px}.demo button{width:100%}html[lang=th] h1{font-size:clamp(2.1rem,7vw,3rem);line-height:1.45}.brand{font-size:18px}.language a{padding:5px 7px}.menu-toggle{font-size:14px}}
@media(max-width:420px){.header-inner{width:calc(100% - 28px);gap:6px}.wrap{width:calc(100% - 36px)}.hero-home h1{font-size:2.6rem}.actions{gap:12px}.hero .actions>.button{width:100%}.progression{grid-template-columns:1fr 1fr}.progression li{padding:16px 12px}.progression li:nth-child(3),.progression li:nth-child(5){border-left:0}.progression li:nth-child(4){border-left:1px solid var(--line)}.progression li:nth-child(n+3){border-top:1px solid var(--line)}.flow{grid-template-columns:1fr}.topology{padding:17px 13px}.model-row span{font-size:11px}.boundary li{font-size:11px}.brand{font-size:16px}.menu-toggle{padding-inline:7px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}