*{box-sizing:border-box}body{margin:0;background:#f7f7f5;color:#202421;font-family:Arial,"Noto Sans CJK JP",sans-serif;font-size:16px;line-height:1.65}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}button,select{font:inherit;color:inherit;background:transparent;border:1px solid #b5bab4;border-radius:5px;padding:8px 12px;cursor:pointer}button:hover{background:#e8ece6}button:focus-visible,a:focus-visible,select:focus-visible{outline:3px solid #377b59;outline-offset:3px}[hidden]{display:none!important}.site-header{padding:24px 40px;border-bottom:1px solid #d9ded7;display:flex;justify-content:space-between;gap:24px;align-items:center}.brand{font-size:30px;font-weight:700;letter-spacing:-1px}.brand span{display:block;font-size:9px;letter-spacing:1.8px;font-weight:400}nav{display:flex;gap:16px;align-items:center;font-size:13px}.shell{max-width:1280px;margin:auto;padding:48px 40px}.eyebrow{font-size:11px;letter-spacing:1.6px;color:#62695f;font-weight:700}.heading{display:flex;align-items:center;justify-content:space-between;gap:30px}h1{font-size:clamp(26px,3vw,42px);line-height:1.3;letter-spacing:-.7px;margin:16px 0}h1 span,h2 span{display:block}h2{font-size:24px;line-height:1.4}p{overflow-wrap:anywhere}.heading>div{min-width:0}h1,h2{overflow-wrap:anywhere}.open-preview{flex-shrink:0;font-size:13px;border-bottom:1px solid #8a9687}.classification{font-size:12px;color:#62695f;margin:16px 0 24px}iframe{display:block;width:100%;height:600px;border:1px solid #d9ded7;border-radius:8px;background:white}.prompt-panel{max-width:860px;margin:48px auto 0;padding:32px;background:#fff;border:1px solid #d9ded7;border-radius:8px}.prompt-toolbar{display:flex;align-items:center;justify-content:space-between;font-size:12px;letter-spacing:1px}pre,textarea{font:14px/1.8 Arial,"Noto Sans CJK JP",sans-serif;white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word;background:#f7f7f5;border:1px solid #e5e8e1;padding:20px;border-radius:5px;width:100%}textarea{min-height:150px}.note{font-size:12px;color:#687064}footer{padding:28px 40px;border-top:1px solid #d9ded7;color:#687064;font-size:12px}.filters{display:flex;gap:24px;margin:30px 0}.filters label{font-size:12px}.filters select{display:block;margin-top:8px;min-width:180px}.gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.card{border:1px solid #d9ded7;background:white;border-radius:8px;overflow:hidden}.card img,.pending-thumbnail{display:block;width:100%;aspect-ratio:8/5;height:auto;object-fit:cover;background:#e8ece6}.pending-thumbnail{padding:32px;display:flex;align-items:center;font-size:13px;color:#687064}.card-text{padding:20px}.card h2{font-size:18px}.card p{font-size:12px;color:#687064}.about{max-width:1000px}.about p{max-width:740px}#intro{position:fixed;inset:0;z-index:10;background:#f7f7f5f5;display:grid;place-items:center;padding:24px;opacity:1;transition:opacity 250ms}#intro>div{max-width:650px}#intro.fading{opacity:0;pointer-events:none}@media(max-width:700px){.site-header{padding:18px 20px;display:block}.brand{font-size:27px}nav{margin-top:18px;gap:12px;flex-wrap:wrap}nav button{padding:7px 10px}.shell{padding:32px 20px}.heading{display:block}.open-preview{display:inline-block;margin-top:12px}iframe{height:480px}.prompt-panel{margin-top:32px;padding:20px}pre,textarea{padding:14px}.gallery{grid-template-columns:1fr}.filters{gap:14px;flex-wrap:wrap}.filters label{flex:1;min-width:120px}.filters select{min-width:0;width:100%}footer{padding:24px 20px}#intro h2{font-size:24px}}
.design-context{max-width:860px;margin:40px auto}.design-context dl{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}.design-context dt{font-size:12px;color:#62695f}.design-context dd{margin:4px 0;overflow-wrap:anywhere}.about section{margin-top:32px}

/* Inert fixed-UI ad layout. Disabled rendering emits no container. */
.advertisement{width:100%;max-width:860px;min-width:0;margin:48px auto 0;padding:16px 0;border-top:1px solid #d9ded7;border-bottom:1px solid #d9ded7}.advertisement-label{text-align:center;font-size:12px;color:#62695f;margin-bottom:12px}.ad-unit{display:block;width:100%;min-width:0;min-height:250px}.ad-unit>iframe{border:0;border-radius:0;max-width:100%}
@media(max-width:700px){.advertisement{margin-top:32px}}

/* Commentary is escaped text; the legacy description remains a short introduction. */
.design-commentary{max-width:860px;margin:40px auto}.design-commentary p{margin:18px 0}.guide{max-width:940px}.guide section{margin-top:32px}.guide h2{margin-top:36px}.guide h3{font-size:18px;line-height:1.5;overflow-wrap:anywhere}.guide a,.prompt-panel>p>a,.about>p>a{text-decoration:underline;text-underline-offset:3px}.guide pre{font-size:15px}.guide .note{font-size:14px}footer nav{flex-wrap:wrap}

/* Purpose discovery and operator-authored comparisons stay outside previews. */
.filters{flex-wrap:wrap;align-items:end;gap:16px}.filters label{min-width:0;flex:1 1 200px;font-size:14px}.filters select{width:100%;min-width:0;max-width:100%;font-size:14px}.filters button{font-size:14px;max-width:100%}
.explore-designs{max-width:860px;margin:48px auto 0}.explore-links{display:flex;flex-wrap:wrap;gap:12px}.explore-links a{border:1px solid #b5bab4;border-radius:5px;padding:10px 14px;font-size:15px}.explore-designs>p>a{text-decoration:underline}
.composition-guide{scroll-margin-top:24px}.composition-options{display:grid;gap:20px}.composition-options article{padding:20px;border-left:3px solid #8a9687;background:#fff}.comparison-examples{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr));gap:24px}.comparison-example{min-width:0;border-top:1px solid #b5bab4;padding-top:20px}.comparison-example img{display:block;width:100%;height:auto;border:1px solid #d9ded7}.comparison-example h3{font-size:18px}.comparison-example p{font-size:15px}.comparison-example a{overflow-wrap:anywhere}

/* Learning content lives in the fixed UI; it never enters a design preview. */
.learning-entry{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:32px;padding-bottom:32px;margin-bottom:36px;border-bottom:1px solid #b5bab4}.learning-title{font-size:clamp(22px,2.4vw,32px);font-weight:700;line-height:1.4;margin:0 0 12px}.learning-entry p{max-width:48em}.learning-routes{display:flex;flex-direction:column;justify-content:center;gap:12px}.learning-routes a{text-decoration:underline;text-underline-offset:4px;font-size:15px}.guide{max-width:1100px}.guide-contents{display:flex;flex-wrap:wrap;gap:12px 24px;margin:32px 0;padding:16px 0;border-top:1px solid #d9ded7;border-bottom:1px solid #d9ded7;font-size:15px}.layout-lab,.reading-notes,#prompt-guide{scroll-margin-top:24px}.lab-study{padding-top:24px;border-top:1px solid #b5bab4}.lab-example{background:#fff;border:1px solid #d9ded7;padding:32px;margin:20px 0;color:#202421;min-width:0}.lab-example h3{font:700 clamp(26px,3vw,40px)/1.3 Georgia,"Noto Serif CJK JP",serif;margin:0 0 16px}.lab-example h4{font-size:18px;margin:0 0 16px}.lab-example h5{font-size:16px;line-height:1.5;margin:0 0 8px}.lab-example p{font-size:16px;margin:0}.lab-facts{margin:28px 0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.lab-facts dt{font-size:14px;color:#62695f}.lab-facts dd{font-size:16px;margin:4px 0 0;overflow-wrap:anywhere}.lab-agenda ol{padding-left:24px;margin:0}.lab-agenda li{padding:8px}.lab-example--center .lab-brief{max-width:36em;margin:12px auto 36px;text-align:center}.lab-example--center .lab-facts{border-top:1px solid #d9ded7;border-bottom:1px solid #d9ded7;padding:24px 0}.lab-example--rail{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px}.lab-example--rail .lab-brief{grid-row:span 2;padding-right:24px;border-right:2px solid #377b59}.lab-example--rail .lab-facts{grid-template-columns:1fr;margin:0}.lab-example--rail .lab-agenda{grid-column:2}.lab-example--modules .lab-agenda ol{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;list-style-position:inside;padding:0}.lab-example--modules .lab-agenda li{background:#f7f7f5;padding:16px;min-width:0}.lab-example--modules .lab-facts{border-bottom:1px solid #d9ded7;padding-bottom:24px}.lab-study details{margin:20px 0}.lab-study summary{cursor:pointer;text-decoration:underline;text-underline-offset:3px;padding:12px 0;overflow-wrap:anywhere}.lab-study pre{max-height:420px;overflow:auto;font:14px/1.7 monospace}.study-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 28px;padding-left:20px}.reading-note{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.7fr);gap:28px;padding:32px 0;border-top:1px solid #b5bab4;scroll-margin-top:24px}.reading-note img{display:block;width:100%;height:auto;border:1px solid #d9ded7}.reading-note h3{margin:0 0 24px}.reading-note h4{font-size:16px;margin:22px 0 8px}.reading-note p{margin:8px 0;font-size:16px}.card-note{padding:0 20px 24px}.card-note p{font-size:15px;color:#3e493c}.card-note a{font-size:15px;text-decoration:underline;text-underline-offset:3px}.brand span{font-size:11px;letter-spacing:1px}.note{font-size:14px}
@media(max-width:700px){.learning-entry,.reading-note{grid-template-columns:minmax(0,1fr);gap:20px}.study-index{grid-template-columns:minmax(0,1fr)}.lab-example{padding:20px}.lab-facts,.lab-example--modules .lab-agenda ol{grid-template-columns:minmax(0,1fr)}.lab-example--rail{display:block}.lab-example--rail .lab-brief{border-right:0;border-bottom:2px solid #377b59;padding:0 0 24px}.lab-example--rail .lab-facts{margin:24px 0}.lab-example--center .lab-brief{margin:0 auto 24px}.guide-contents{font-size:14px}.reading-note-image{max-width:480px}}

@media(max-width:700px){.learning-entry{gap:12px;padding-bottom:24px;margin-bottom:24px}.learning-routes{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;gap:8px 16px}.learning-routes a{font-size:14px}}

/* Home-only viewport workbench. The generated document remains opaque and inert. */
.preview-controls{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px 24px;padding:16px 0;font-size:15px}.preview-controls p{flex-basis:100%;margin:0;color:#62695f;font-size:14px}.preview-width-options{display:flex;gap:8px;flex-wrap:wrap}.preview-width-options button[aria-pressed="true"]{background:#202421;color:#fff;border-color:#202421}.preview-stage{padding:20px;background:#e8ece6;border:1px solid #d9ded7;border-radius:8px}.preview-stage iframe{margin-inline:auto;max-width:100%;width:100%;transition:width 180ms ease-out;box-shadow:0 8px 24px #20242112}.preview-workbench--mobile iframe{width:390px}.preview-width-options button:active{transform:translateY(1px)}
@media(max-width:700px){.preview-stage{padding:8px}.preview-controls{gap:10px}.preview-controls>div:first-child{flex-basis:100%}}
@media(prefers-reduced-motion:reduce){.preview-stage iframe,#intro{transition:none}.preview-width-options button:active{transform:none}}