/* Scoped navigation: game controls retain their own styles and behavior. */
.lab-header,.lab-menu{color:#281632;background:#faf9f5;font-family:"Yu Gothic",YuGothic,"Hiragino Kaku Gothic ProN",Meiryo,sans-serif;color-scheme:light;line-height:1.6}
.lab-header *,.lab-menu *{box-sizing:border-box}
body>.lab-header{display:block;margin:0;padding:0;border:0;position:relative;z-index:10}
.lab-header-inner{box-sizing:border-box;max-width:1040px;height:88px;padding:0 48px;margin:auto;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #d9d2dd}
.lab-header .lab-brand{display:flex;align-items:center;gap:8px;font-size:22px;font-weight:900;letter-spacing:.025em;text-decoration:none;color:#281632}
.lab-brand img{display:block;width:28px;height:28px;flex-shrink:0}
.lab-header .lab-menu-trigger{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:48px;height:48px;min-height:48px;padding:0;margin:0;border:0;border-radius:8px;background:transparent;color:#281632;box-shadow:none;cursor:pointer}
.lab-menu-trigger>span{width:23px;height:2px;background:currentColor}.lab-menu-trigger small{font:8px monospace;letter-spacing:.13em;margin-top:3px}
.lab-header .lab-menu-trigger:hover{background:#eee8f1}
dialog.lab-menu{box-sizing:border-box;width:min(420px,92vw);max-width:100%;height:100dvh;max-height:100dvh;margin:0 0 0 auto;padding:24px;border:0;overflow-y:auto;box-shadow:-12px 0 40px #28163218}
.lab-menu::backdrop{background:#28163255;backdrop-filter:blur(4px)}
.lab-menu .lab-menu-top{display:flex;align-items:center;justify-content:space-between;padding:12px 0 20px;border-bottom:1px solid #d9d2dd;font:10px monospace;letter-spacing:.1em}
.lab-menu button{font:inherit;color:#281632;background:transparent;border:0;border-radius:8px;box-shadow:none;cursor:pointer;margin:0}
.lab-menu .lab-menu-close{font:32px/1 sans-serif;width:44px;height:44px;padding:0}
.lab-menu nav{display:flex;flex-direction:column;gap:0;margin:0;padding:0;border:0}
.lab-menu nav a{display:flex;align-items:center;gap:16px;min-height:68px;padding:14px 0;border-bottom:1px solid #d9d2dd;color:#281632;text-decoration:none;font-size:17px;font-weight:700}
.lab-menu nav a small{font:10px monospace;color:#786e7f}.lab-menu nav a b{margin-left:auto;font-size:22px}.lab-menu nav a:hover b{color:#688a37}
.lab-menu .lab-utility{display:flex;flex-wrap:wrap;gap:14px 18px;padding-top:28px;font-size:12px}
.lab-utility a,.lab-utility button{color:#786e7f;text-decoration:none;padding:0;line-height:1.7}
.lab-header :focus-visible,.lab-menu :focus-visible{outline:3px solid #8353a8;outline-offset:4px}
/* Site information lives in the common menu; replace legacy app footers visually
   without touching React-managed DOM or any in-game controls. */
body[data-lab-page="app"] #root footer{display:none}
body[data-lab-page]>.lab-footer{box-sizing:border-box;margin:0;padding:0 48px;border:0;background:#faf9f5;color:#786e7f;font-family:"Yu Gothic",YuGothic,"Hiragino Kaku Gothic ProN",Meiryo,sans-serif;line-height:1.6;color-scheme:light}
.lab-footer .lab-footer-inner{box-sizing:border-box;max-width:944px;margin:auto;display:flex;align-items:center;flex-wrap:wrap;gap:20px;padding:22px 0;border-top:1px solid #d9d2dd;font-size:11px}
body[data-lab-page]>.lab-footer a{display:flex;align-items:center;min-height:40px;color:#786e7f;text-decoration:none}
.lab-footer a:nth-child(2){font-size:20px}
.lab-footer small{margin-left:auto;font:10px monospace;letter-spacing:.05em}
.lab-footer a:hover{color:#281632}
.lab-footer :focus-visible{outline:3px solid #8353a8;outline-offset:4px}
@media(max-width:699px){body[data-lab-page]>.lab-footer{padding-inline:20px}.lab-footer .lab-footer-inner{padding-block:18px;gap:12px;font-size:10px}.lab-footer small{font-size:9px}}
@media(max-width:360px){body[data-lab-page]>.lab-footer{padding-inline:16px}.lab-footer small{flex-basis:100%;margin-left:0}}
/* Reading pages share the homepage's paper, typography and quiet separators. */
html:has(body[data-lab-page="info"]){background:#faf9f5;color-scheme:light}
body[data-lab-page="info"]{margin:0;background:#faf9f5;color:#281632;font-family:"Yu Gothic",YuGothic,"Hiragino Kaku Gothic ProN",Meiryo,sans-serif;line-height:1.9}
body[data-lab-page="info"]>.paper,body[data-lab-page="info"]>main{box-sizing:border-box;width:100%;max-width:860px;margin:0 auto;padding:36px 48px 64px;border:0;border-radius:0;background:transparent;color:#281632;box-shadow:none;min-height:0}
body[data-lab-page="info"] main h1{font-size:clamp(26px,4.5vw,36px);font-weight:800;letter-spacing:.01em;line-height:1.5;margin:0 0 24px}
body[data-lab-page="info"] main h2{font-size:22px;font-weight:750;line-height:1.6;margin:36px 0 14px;color:#281632}
body[data-lab-page="info"] main p,body[data-lab-page="info"] main li{line-height:1.95;font-size:15px}
body[data-lab-page="info"] a{color:#493354;text-underline-offset:4px}
body[data-lab-page="info"] .updated,body[data-lab-page="info"] footer p{color:#786e7f}
body[data-lab-page="info"] dt{color:#281632;font-weight:700}
body[data-lab-page="info"] footer{border-color:#d9d2dd}
body[data-lab-page="info"] .game-hero{border-radius:12px 12px 0 0;max-width:100%;height:auto}
body[data-lab-page="info"] input,body[data-lab-page="info"] textarea,body[data-lab-page="info"] select{background:#fffdf8;color:#281632;border-color:#c8c1cc}
body[data-lab-page="info"] main button[type="submit"]{background:#281632;color:#faf9f5;border:1px solid #281632;border-radius:28px}
body[data-lab-page="info"] :focus-visible{outline:3px solid #8353a8;outline-offset:4px}
@media(max-width:699px){.lab-header-inner{height:72px;padding-inline:20px}.lab-header .lab-brand{font-size:19px}body[data-lab-page="info"]>.paper,body[data-lab-page="info"]>main{padding:28px 20px 48px}.lab-menu nav a{min-height:60px;font-size:16px}body[data-lab-page="info"] main h2{font-size:20px}}
/* Finish the shared reading-page design without changing game interactions. */
body[data-lab-page="info"] .host-plan{background:#eef3e5;border:1px solid #d5deca;border-radius:16px;padding:24px;box-shadow:none}
body[data-lab-page="info"] main .back{display:inline-flex;align-items:center;justify-content:space-between;gap:20px;min-height:52px;max-width:100%;padding:14px 24px;border:1px solid #281632;border-radius:999px;background:#281632;color:#faf9f5;font-size:14px;font-weight:700;line-height:1.6;text-decoration:none;box-shadow:none;transition:color .18s,background .18s}
body[data-lab-page="info"] main .back:hover{color:#c4e87b;background:#35213f}
body[data-lab-page="info"] main>nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;padding:20px 0;border:0;border-top:1px solid #d9d2dd;border-radius:0}
body[data-lab-page="info"] main>nav a{display:inline-flex;align-items:center;min-height:40px;padding:8px 14px;border:1px solid #d9d2dd;border-radius:24px;text-decoration:none;font-size:12px;background:#fffdf8}
body[data-lab-page="info"] main>nav a:hover{background:#eef3e5;border-color:#9eb77a}
body[data-lab-page="info"] #contact-form input[type=email],body[data-lab-page="info"] #contact-form textarea{border:1px solid #c8c1cc;border-radius:10px;padding:14px;background:#fffdf8;color:#281632;font:inherit}
body[data-lab-page="info"] #contact-form .contact-types{display:flex;gap:12px;flex-wrap:wrap;margin:12px 0 24px}
body[data-lab-page="info"] #contact-form .contact-types label{display:flex;gap:8px;align-items:center;padding:10px 16px;border:1px solid #d9d2dd;border-radius:24px;background:#fffdf8;cursor:pointer}
body[data-lab-page="info"] #contact-form input[type=radio],body[data-lab-page="info"] #contact-form input[type=checkbox]{accent-color:#5e783b}
body[data-lab-page="info"] #contact-form button{min-height:52px;border:1px solid #281632;border-radius:28px;background:#281632;color:#faf9f5;box-shadow:none}
body[data-lab-page="info"] #contact-form button:hover{color:#c4e87b}
body[data-lab-page="info"] .lab-catalog{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin:32px 0}
body[data-lab-page="info"] .lab-catalog article{min-width:0;border:1px solid #d9d2dd;border-radius:16px;overflow:hidden;background:#fffdf8}
body[data-lab-page="info"] .lab-catalog .game-hero{display:block;margin:0;width:100%;height:auto;border-radius:0}
body[data-lab-page="info"] .lab-catalog h2{font-size:19px;margin:18px 20px 10px}
body[data-lab-page="info"] .lab-catalog h2 a{text-decoration:none}
body[data-lab-page="info"] .lab-catalog p{margin:0 20px 22px;font-size:13px;color:#786e7f}
body[data-lab-page="app"] .topbar .lab-link{display:none}
@media(max-width:699px){body[data-lab-page="info"] .lab-catalog{grid-template-columns:1fr;gap:20px}body[data-lab-page="info"] .host-plan{padding:20px}body[data-lab-page="info"] main .back{padding:14px 20px;font-size:13px}}
@media(prefers-reduced-motion:reduce){body[data-lab-page="info"] main .back{transition:none}}
body[data-lab-page="info"] #contact-form fieldset>label{display:inline-flex;align-items:center;gap:8px;margin:12px 8px 0 0;padding:10px 16px;border:1px solid #d9d2dd;border-radius:24px;background:#fffdf8;cursor:pointer}
body[data-lab-page="info"] #contact-form fieldset>label:has(:checked){background:#eef3e5;border-color:#9eb77a}
/* Same closing signature as the homepage. */
.lab-footer .lab-footer-inner{padding:30px 0 24px;gap:16px 24px;border-top:1px solid #c8bdce}
.lab-footer-inner::before{content:'NIWATOKO LAB';display:block;flex-basis:100%;font:900 clamp(30px,5vw,52px)/1.1 Arial,sans-serif;letter-spacing:-.055em;color:#281632;margin-bottom:10px}
body[data-lab-page]>.lab-footer a{font-size:12px;font-weight:700}
body[data-lab-page]>.lab-footer a:nth-child(2){width:40px;height:40px;justify-content:center;border:1px solid #d9d2dd;border-radius:50%;font-size:19px}
body[data-lab-page]>.lab-footer a:hover{color:#526c2c}
body[data-lab-page]>.lab-footer a:nth-child(2):hover{background:#c4e87b;border-color:#c4e87b}
@media(max-width:699px){.lab-footer .lab-footer-inner{padding:26px 0 20px;gap:12px}.lab-footer-inner::before{font-size:34px;margin-bottom:6px}body[data-lab-page]>.lab-footer a{font-size:11px}.lab-footer small{font-size:9px;flex-basis:100%;margin:2px 0 0}}
/* Action labels are centered; navigation and game answers keep their layout. */
body[data-lab-page="info"] main .back,body[data-lab-page="info"] main button[type="submit"],body[data-lab-page="app"] .primary,body[data-lab-page="app"] .outline-button{justify-content:center;text-align:center}

.lab-demo-intro{max-width:760px;margin:32px auto;padding:24px;line-height:1.9}.lab-demo-intro h1{font-size:clamp(24px,4vw,36px);line-height:1.4}.lab-demo-intro a{text-decoration:underline}