/* Two concept studies: a shared editorial system, with tangible design examples. */
.concept-page{--cs-ink:#19251f;--cs-muted:#5b695e;--cs-paper:#f2f4ed;--cs-line:#cbd3c5;--cs-lime:#c9ff3b}
.concept-page .page-hero{padding-bottom:48px}
.concept-page .page-intro{margin-top:36px}
.concept-page .page-intro>p{max-width:39em}
.concept-page .page-body.concept-content{padding-top:0;padding-bottom:70px;color:var(--cs-ink)}
.concept-note{display:flex;align-items:baseline;gap:22px;padding:20px 0 24px;font-size:12px;line-height:1.8;color:var(--cs-muted)}
.concept-note>span{flex:none;font:600 10px/1.5 Inter,sans-serif;letter-spacing:.1em;border:1px solid var(--cs-line);padding:5px 9px}
.concept-content p{line-height:1.95}.concept-content figure{margin:0}.concept-content button{font:inherit}.concept-content :is(a,button):focus-visible{outline:3px solid #82aa18;outline-offset:5px}
.cs-kicker{font:600 11px/1.6 Inter,'Noto Sans JP',sans-serif;letter-spacing:.1em;color:var(--cs-muted)}
.cs-section{padding-block:88px;border-bottom:1px solid var(--cs-line)}
.cs-section-head{display:grid;grid-template-columns:1fr 1.25fr;gap:9%;margin-bottom:38px}
.cs-section h2,.cs-outro h2{font-size:clamp(29px,3.2vw,47px);line-height:1.45;font-weight:600;letter-spacing:-.055em;text-wrap:balance}
.cs-section-head h2{margin-top:17px}.cs-section-head>p{align-self:end;color:var(--cs-muted);font-size:16px;max-width:36em}
.cs-brief{display:grid;grid-template-columns:1.5fr 1fr;gap:10%;padding-block:66px;border-bottom:1px solid var(--cs-line)}
.cs-brief h2{font-size:clamp(27px,2.7vw,39px);line-height:1.5;letter-spacing:-.045em;margin:18px 0 22px;font-weight:600;text-wrap:balance}.cs-brief p{font-size:16px;color:var(--cs-muted);max-width:37em}
.cs-facts{margin:0;align-self:center}.cs-facts>div{display:grid;grid-template-columns:95px 1fr;gap:18px;border-top:1px solid var(--cs-line);padding:17px 0;font-size:13px;line-height:1.85}.cs-facts dt{color:var(--cs-muted)}.cs-facts dd{margin:0;font-weight:500}
.cs-showcase{background:var(--cs-ink);padding:28px;color:#fff;overflow:hidden}
.cs-showcase-label{display:flex;justify-content:space-between;gap:18px;align-items:center;margin-bottom:22px;font-size:11px;line-height:1.7;color:#c7d1c4}.cs-showcase-label>span:first-child{font:600 10px/1.5 Inter,sans-serif;letter-spacing:.14em;color:var(--cs-lime)}
.cs-browser{background:#efefe6;color:#28302a;border:1px solid #ffffff40}
.cs-browser-top{display:flex;align-items:center;justify-content:space-between;padding:22px 30px;border-bottom:1px solid #cbcbbf;gap:20px}
.cs-architecture-brand{font:600 25px/1.4 'Yu Mincho','Hiragino Mincho ProN',serif;letter-spacing:.2em}.cs-architecture-brand small{display:block;font:500 8px/1.8 Inter,sans-serif;letter-spacing:.2em}
.cs-browser-top>span{font-size:10px;letter-spacing:.09em}.cs-browser-top>i{font-size:11px;font-style:normal;border-bottom:1px solid;padding-bottom:5px}
.cs-architecture-cover{position:relative;min-height:clamp(360px,40vw,540px);isolation:isolate;overflow:hidden}
.cs-architecture-cover>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2}
.cs-architecture-cover:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,#09140d8c,transparent 80%);z-index:-1}
.cs-architecture-cover>div{padding:50px 6%;color:#fff}.cs-architecture-cover small{font-size:10px;letter-spacing:.18em}
.cs-architecture-cover strong{display:block;margin-top:35px;font:400 clamp(37px,4.8vw,68px)/1.55 'Yu Mincho','Hiragino Mincho ProN',serif;letter-spacing:.09em}.cs-architecture-cover p{font-size:12px;margin-top:24px;letter-spacing:.08em}
.cs-browser-bottom{display:flex;justify-content:space-between;align-items:center;padding:20px 30px;gap:20px;font-size:11px}.cs-browser-bottom b{font-weight:600;margin-right:18px}.cs-browser-bottom i{font-style:normal;font-size:20px}
.cs-showcase>figcaption{display:flex;justify-content:space-between;gap:24px;margin-top:22px;font-size:12px;color:#c7d1c4;line-height:1.85}.cs-showcase>figcaption span{max-width:52em}.cs-showcase>figcaption b{color:var(--cs-lime);font-weight:500;white-space:nowrap}
.cs-three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px}.cs-three article{padding-top:22px;border-top:1px solid var(--cs-line)}.cs-three article>span{font:500 12px/1.5 Inter,sans-serif;color:#677d43}.cs-three h3{font-size:23px;line-height:1.5;letter-spacing:-.035em;margin:18px 0 15px;font-weight:600}.cs-three p{font-size:14px;color:var(--cs-muted)}
.cs-journey{background:var(--cs-paper);padding:32px;margin-top:38px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}.cs-journey>div{position:relative;border-top:2px solid var(--cs-ink);padding-top:17px}.cs-journey>div:before{content:'';position:absolute;top:-5px;left:0;width:8px;height:8px;background:#92b929}.cs-journey small{font:500 10px/1.5 Inter,sans-serif;letter-spacing:.09em}.cs-journey strong{display:block;font-size:19px;margin:12px 0 7px}.cs-journey p{font-size:12px;color:var(--cs-muted)}
.cs-design-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:24px}
.cs-typeboard{background:var(--cs-ink);color:#f3f5ee;padding:35px;min-height:350px;display:flex;flex-direction:column}.cs-typeboard small{font:500 10px/1.5 Inter,sans-serif;letter-spacing:.12em;color:#c6d2bd}.cs-typeboard strong{font:400 clamp(48px,6vw,89px)/1.4 'Yu Mincho','Hiragino Mincho ProN',serif;letter-spacing:.04em;margin:25px 0}.cs-swatches{display:flex;gap:10px;margin-top:auto}.cs-swatches span{flex:1;min-height:54px;border:1px solid #ffffff4d;font:500 9px/1.5 Inter,sans-serif;padding:9px;display:flex;align-items:end}.cs-swatches span:nth-child(1){background:#efefe6;color:#28302a}.cs-swatches span:nth-child(2){background:#28302a}.cs-swatches span:nth-child(3){background:#a4b68e;color:#28302a}
.cs-mobile-board{background:#e4e9dc;display:flex;align-items:center;justify-content:center;gap:32px;padding:32px;overflow:hidden}
.cs-phone{width:185px;flex:none;background:#f9f9f2;border:6px solid #243027;border-radius:22px;padding:12px 10px 14px;box-shadow:13px 15px 0 #cbd4bf}.cs-phone>small{font:600 12px/1.5 'Yu Mincho',serif;letter-spacing:.15em;display:block;padding:5px 0 12px}.cs-phone-image{height:155px;background:linear-gradient(0deg,#13211480,#13211410),url('/site-assets/20260928/assets/works/proposal-architecture-v1.webp') center/cover;display:flex;align-items:end;padding:11px;color:#fff;font:400 22px/1.5 'Yu Mincho',serif}.cs-phone>p{font-size:10px!important;line-height:1.8!important;margin:14px 2px;color:#56614f}.cs-phone>span{display:flex;justify-content:space-between;padding:10px;background:#28302a;color:#fff;font-size:9px}.cs-mobile-notes{max-width:125px}.cs-mobile-notes span{display:block;padding:16px 0;border-top:1px solid #9ca991;font-size:12px;line-height:1.8}
.cs-design-notes{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:24px}.cs-design-notes p{font-size:14px;color:var(--cs-muted)}.cs-design-notes b{color:var(--cs-ink);display:block;font-weight:600;margin-bottom:7px}
.cs-delivery{display:grid;grid-template-columns:1fr 1fr;gap:10%;padding:44px;background:var(--cs-paper)}.cs-delivery h3{font-size:24px;font-weight:600;line-height:1.6;letter-spacing:-.04em;margin-bottom:20px}.cs-delivery ul{padding:0;list-style:none;margin:0}.cs-delivery li{padding:13px 0;border-top:1px solid var(--cs-line);font-size:14px;line-height:1.9}.cs-delivery p{font-size:14px;color:var(--cs-muted)}
.cs-outro{padding:60px 0 10px;display:grid;grid-template-columns:1.2fr 1fr;gap:9%;align-items:center}.cs-outro p{margin-top:20px;color:var(--cs-muted);font-size:15px}.cs-outro-links{display:grid;gap:16px}.cs-button{display:flex;align-items:center;justify-content:space-between;gap:22px;background:var(--cs-ink);color:#fff;padding:22px 25px;font-size:15px;font-weight:550}.cs-button span{display:grid;place-items:center;background:var(--cs-lime);color:var(--cs-ink);width:34px;height:34px;border-radius:50%;font-size:22px;flex:none}.cs-secondary{display:flex;justify-content:space-between;border-bottom:1px solid var(--cs-line);padding:15px 0;font-size:14px}.cs-related{display:flex;justify-content:space-between;gap:20px;padding-top:34px;margin-top:50px;border-top:1px solid var(--cs-line);font-size:13px}
/* An illustrative, local-only workflow demo; the confirmation step is explicit. */
.cs-app{background:#f4f6ef;color:var(--cs-ink);border:1px solid #778171}
.cs-app-top{display:flex;justify-content:space-between;align-items:center;padding:20px 25px;gap:18px;border-bottom:1px solid var(--cs-line)}.cs-app-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:650}.cs-app-brand i{display:grid;place-items:center;background:var(--cs-lime);font-style:normal;width:29px;height:29px;font-size:15px}.cs-app-top>span{font-size:11px;color:var(--cs-muted)}
.cs-demo-tabs{display:flex;gap:7px;flex-wrap:wrap;padding:20px 25px 0}.cs-demo-tabs button{border:1px solid #b9c6af;background:transparent;color:var(--cs-ink);padding:10px 17px;font-size:12px;cursor:pointer}.cs-demo-tabs button[aria-pressed=true]{background:var(--cs-ink);color:#fff;border-color:var(--cs-ink)}
.cs-app-body{display:grid;grid-template-columns:1fr 1.2fr;gap:22px;padding:25px}.cs-source,.cs-result{background:#fff;border:1px solid #d4dccd;min-width:0;padding:24px}.cs-panel-label{display:flex;justify-content:space-between;gap:14px;align-items:center;font-size:10px;letter-spacing:.06em;color:var(--cs-muted);padding-bottom:18px;border-bottom:1px solid #d4dccd}.cs-panel-label i{font-style:normal;font-size:9px;background:#edf2e7;padding:4px 7px}.cs-source h3{font-size:17px;line-height:1.6;margin:22px 0 14px;font-weight:600}.cs-source p{font-size:13px;color:#53604f;min-height:145px}.cs-source>small{display:block;border-top:1px solid #e1e7dc;padding-top:13px;margin-top:22px;font-size:10px;line-height:1.8;color:#64705e}
.cs-result-empty{min-height:235px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;gap:13px}.cs-result-empty>span{display:grid;place-items:center;background:var(--cs-lime);width:58px;height:58px;border-radius:14px;font:600 22px/1 Inter,sans-serif}.cs-result-empty p{font-size:13px;color:#596651;max-width:23em}.cs-result-data[hidden],.cs-result-empty[hidden]{display:none}
.cs-result-data dl{margin:16px 0}.cs-result-data dl>div{display:grid;grid-template-columns:70px 1fr;gap:13px;padding:10px 0;border-bottom:1px solid #e0e6da;font-size:12px;line-height:1.7}.cs-result-data dt{color:#66725e}.cs-result-data dd{margin:0;font-weight:500}.cs-result-data>p{font-size:12px!important;background:#edf3e4;border-left:2px solid #88a94b;padding:10px 12px;color:#4b5f39}.cs-confirm{display:flex;align-items:flex-start;gap:10px;font-size:12px;line-height:1.8;margin-top:16px}.cs-confirm input{width:16px;height:16px;margin-top:3px;accent-color:#3e5c24;flex:none}
.cs-app-actions{display:flex;justify-content:space-between;align-items:center;gap:20px;margin:0 25px;padding:20px 0;border-top:1px solid var(--cs-line)}.cs-app-actions button{border:0;background:var(--cs-ink);color:#fff;padding:13px 20px;font-size:13px;cursor:pointer;min-width:175px}.cs-app-actions button:disabled{opacity:.45;cursor:default}.cs-app-actions button span{color:var(--cs-lime);margin-left:20px}.cs-app-status{font-size:11px!important;color:#5b6a52;max-width:31em;min-height:2em;line-height:1.8!important}
.cs-app-notice{display:block;padding:0 25px 20px;font-size:10px;line-height:1.8;color:#65715c}
.cs-flowboard{padding:40px;background:var(--cs-ink);color:#fff;margin-top:38px}.cs-flowboard>div:first-child{display:flex;justify-content:space-between;gap:20px;font-size:11px;color:#b6c5ab;letter-spacing:.08em;margin-bottom:32px}.cs-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}.cs-flow>div{position:relative;border-top:1px solid #70805e;padding-top:20px}.cs-flow>div:before{content:'';position:absolute;top:-4px;left:0;width:7px;height:7px;background:var(--cs-lime)}.cs-flow small{font:500 10px/1.5 Inter,sans-serif;color:#b3c2a8}.cs-flow strong{display:block;font-size:22px;line-height:1.5;margin:15px 0 12px}.cs-flow p{font-size:12px;color:#b8c7b0}.cs-flow .cs-human{border-color:var(--cs-lime)}.cs-flow .cs-human strong{color:var(--cs-lime)}
.cs-principles{display:grid;grid-template-columns:1fr 1fr;gap:0 45px;margin-top:32px}.cs-principles article{display:grid;grid-template-columns:35px 1fr;gap:15px;border-top:1px solid var(--cs-line);padding:25px 0}.cs-principles article>span{font-size:12px;color:#6f814f}.cs-principles h3{font-size:19px;font-weight:600;line-height:1.6;margin-bottom:10px}.cs-principles p{font-size:14px;color:var(--cs-muted)}
@media(min-width:1600px){.concept-page .page-hero,.concept-page .concept-content{max-width:1456px;margin-inline:auto;padding-inline:48px}.concept-page .page-title.long-title{font-size:clamp(90px,7vw,126px)}}
@media(max-width:1000px){.cs-section-head{gap:6%}.cs-browser-top>span{display:none}.cs-app-body{gap:14px;padding:18px}.cs-source,.cs-result{padding:18px}.cs-mobile-board{gap:18px;padding:25px}.cs-mobile-notes{max-width:90px}.cs-design-grid{grid-template-columns:1fr 1fr}.cs-typeboard{padding:27px}.cs-journey{gap:18px;padding:25px}.cs-flowboard{padding:28px}.cs-flow{gap:18px}}
@media(max-width:700px){.concept-page .page-body.concept-content{padding-bottom:45px}.concept-note{display:block;padding:14px 0 25px;font-size:11px}.concept-note>span{display:inline-block;margin-bottom:10px}.cs-showcase{padding:15px}.cs-showcase-label{font-size:9px;gap:15px;margin-bottom:15px}.cs-showcase-label>span:first-child{font-size:8px}.cs-browser-top{padding:15px}.cs-architecture-brand{font-size:19px}.cs-browser-top>i{font-size:9px}.cs-architecture-cover{min-height:330px}.cs-architecture-cover>img{object-position:58% center}.cs-architecture-cover>div{padding:32px 7%}.cs-architecture-cover strong{font-size:37px;line-height:1.65;margin-top:35px}.cs-architecture-cover p{font-size:10px;max-width:17em}.cs-browser-bottom{padding:15px;font-size:9px}.cs-browser-bottom b{margin-right:8px}.cs-browser-bottom>span:last-child{display:none}.cs-showcase>figcaption{display:block;font-size:11px;margin-top:15px}.cs-showcase>figcaption b{display:block;margin-top:10px}.cs-brief{grid-template-columns:1fr;gap:30px;padding-block:45px}.cs-brief p,.cs-section-head>p{font-size:15px}.cs-section{padding-block:50px}.cs-section-head{grid-template-columns:1fr;gap:24px;margin-bottom:28px}.cs-section h2,.cs-outro h2{font-size:29px;line-height:1.55}.cs-three{grid-template-columns:1fr;gap:24px}.cs-three article{padding-top:17px}.cs-three h3{margin:12px 0;font-size:23px}.cs-journey{grid-template-columns:1fr 1fr;gap:25px 18px;padding:24px}.cs-journey strong{font-size:17px}.cs-design-grid{grid-template-columns:1fr}.cs-typeboard{min-height:300px}.cs-typeboard strong{font-size:60px}.cs-mobile-board{min-height:360px;gap:30px}.cs-mobile-notes{max-width:105px}.cs-design-notes{grid-template-columns:1fr;gap:18px}.cs-delivery{grid-template-columns:1fr;gap:30px;padding:25px}.cs-delivery h3{font-size:22px}.cs-outro{grid-template-columns:1fr;gap:30px;padding-top:45px}.cs-outro p{font-size:14px}.cs-button{font-size:14px;padding:17px 20px}.cs-related{font-size:12px;line-height:1.8}.cs-app-top{padding:15px}.cs-app-brand{font-size:15px}.cs-app-top>span{font-size:9px}.cs-demo-tabs{padding:15px 15px 0;gap:6px}.cs-demo-tabs button{padding:9px 11px;font-size:11px}.cs-app-body{grid-template-columns:1fr;padding:15px;gap:15px}.cs-source,.cs-result{padding:18px}.cs-source p{min-height:0;font-size:12px}.cs-source>small{margin-top:15px}.cs-source h3{font-size:16px;margin-top:15px}.cs-app-actions{display:flex;flex-direction:column;align-items:stretch;margin-inline:15px;gap:12px;padding:15px 0}.cs-app-actions button{width:100%;order:-1}.cs-app-status{font-size:11px!important}.cs-app-notice{padding:0 15px 15px}.cs-result-empty{min-height:185px}.cs-flowboard{padding:25px}.cs-flowboard>div:first-child{display:block;line-height:1.9}.cs-flowboard>div:first-child span{display:block}.cs-flow{grid-template-columns:1fr 1fr;gap:28px 20px}.cs-flow strong{font-size:20px}.cs-principles{grid-template-columns:1fr}.cs-principles article{padding-block:21px}}
@media(prefers-reduced-motion:no-preference){.cs-result-data:not([hidden]){animation:cs-result-in .35s ease both}@keyframes cs-result-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}}
@media(max-width:700px){.cs-architecture-cover strong{font-size:clamp(23px,6.7vw,37px);letter-spacing:.04em}.cs-architecture-cover p{max-width:none;font-size:11px}.cs-typeboard strong{font-size:clamp(33px,10vw,52px)}.cs-showcase-label>span:first-child{flex:none;white-space:nowrap}.cs-showcase-label>span:last-child{text-align:right}}

@media(min-width:701px) and (max-width:1000px){.cs-section-head{grid-template-columns:1fr;gap:22px}.cs-section-head>p{max-width:42em}.cs-section-head h2{font-size:34px}}
@media(max-width:700px){.cs-brief h2{font-size:25px}}
/* AI study: a concise proposal first, optional interaction second. */
.ai-overview{display:grid;grid-template-columns:1fr 1fr;gap:7%;align-items:center;background:var(--cs-ink);color:#f4f6ee;padding:54px}.ai-overview .cs-kicker{color:#c2d0b7}.ai-overview h2{font-size:clamp(29px,3vw,44px);line-height:1.5;letter-spacing:-.04em;margin:20px 0}.ai-overview p{font-size:14px;color:#c4cebe}.ai-overview-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}.ai-overview-tags span{font-size:11px;border:1px solid #708067;padding:7px 10px}.ai-blueprint{padding:15px 0}.ai-blueprint-input,.ai-blueprint-output{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;text-align:center;font-size:12px}.ai-blueprint-input span,.ai-blueprint-output span{padding:13px 6px;border:1px solid #627159}.ai-blueprint-core{position:relative;display:grid;justify-items:center;gap:12px;margin:30px 0;padding:27px 10px;border:1px solid #c9ff3b;background:#243324}.ai-blueprint-core:before,.ai-blueprint-core:after{content:'';position:absolute;left:50%;height:30px;border-left:1px solid #c9ff3b}.ai-blueprint-core:before{bottom:100%}.ai-blueprint-core:after{top:100%}.ai-blueprint-core>span{display:grid;place-items:center;width:45px;height:45px;background:var(--cs-lime);color:var(--cs-ink);font:650 22px/1 Inter,sans-serif}.ai-blueprint-core strong{font-size:20px}.ai-blueprint-core small{font-size:11px;color:#c4cebe}.ai-ownership{display:grid;grid-template-columns:1fr 1fr;gap:55px;background:var(--cs-paper);padding:36px}.ai-ownership h3{font-size:25px;line-height:1.5;margin:14px 0}.ai-ownership p{font-size:14px;color:var(--cs-muted)}.ai-demo-section{padding-top:35px}.ai-demo-disclosure{border-block:1px solid var(--cs-line)}.ai-demo-disclosure summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:25px 0;cursor:pointer}.ai-demo-disclosure summary::-webkit-details-marker{display:none}.ai-demo-disclosure summary small{display:block;color:var(--cs-muted);font-size:11px;margin-bottom:10px}.ai-demo-disclosure summary strong{font-size:18px;font-weight:550;line-height:1.7}.ai-disclosure-icon{font-size:25px;color:var(--cs-muted);transition:transform .2s}.ai-demo-disclosure[open] .ai-disclosure-icon{transform:rotate(45deg)}.ai-demo-inner>p{font-size:13px;color:var(--cs-muted);max-width:58em;margin:0 0 22px}.ai-demo-inner{padding-bottom:25px}.ai-concept-content .cs-result-data dl>div{grid-template-columns:90px 1fr}.ai-concept-content .cs-source p{min-height:0}.ai-concept-content .cs-source>small{display:none}.ai-concept-content .cs-showcase-label{display:none}
@media(max-width:1000px){.ai-overview{padding:32px;gap:30px}.ai-overview-tags{gap:6px}.ai-ownership{gap:30px}}
@media(max-width:700px){.ai-overview{grid-template-columns:1fr;padding:26px;gap:22px}.ai-overview h2{font-size:29px}.ai-overview-tags{margin-top:20px}.ai-blueprint-input,.ai-blueprint-output{font-size:11px}.ai-ownership{grid-template-columns:1fr;padding:26px;gap:30px}.ai-ownership h3{font-size:23px}.ai-demo-disclosure summary strong{font-size:16px}.ai-concept-content .cs-result-data dl>div{grid-template-columns:1fr;gap:5px}.ai-concept-content .cs-outro h2{font-size:26px}}
.ai-disclosure-icon{display:grid;place-items:center;flex:0 0 40px;height:40px}.ai-demo-disclosure[open] .ai-disclosure-icon{transform:none}.ai-demo-disclosure[open] .ai-disclosure-icon{font-size:0}.ai-demo-disclosure[open] .ai-disclosure-icon:after{content:"−";font-size:25px}
.ai-demo-section{padding-top:0}.ai-demo-disclosure{border-top:0}