/* MULTI LAB GUIDE — original design system v2.0
   Principles: primary task first, honest decisions, accessible controls, transparent commercial links.
*/
:root{
  --surface:#fff;--background:#f6f8fc;--surface-subtle:#f0f4fa;
  --ink:#19283b;--muted:#51627a;--muted-soft:#6c7d91;--border:#dce4ee;
  --brand:#2255d7;--brand-hover:#173ea4;--brand-soft:#eaf0ff;--focus:#ffbd48;
  --green:#11694d;--green-soft:#e5f5ec;--dark:#162b50;
  --radius-sm:9px;--radius-md:14px;--radius-lg:22px;
  --shadow:0 15px 45px rgba(23,43,84,.08);
  --font:system-ui,-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic","Meiryo",sans-serif;
}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:92px}body{margin:0;background:var(--surface);color:var(--ink);font:400 16px/1.7 var(--font);-webkit-font-smoothing:antialiased}button,input{font:inherit}a{color:inherit}a:hover{color:var(--brand)}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}button{cursor:pointer}button:disabled{cursor:not-allowed}.shell,.wrap{width:min(1140px,calc(100% - 48px));margin-inline:auto}[hidden]{display:none!important}
.skip-link,.skip{position:fixed;top:-100px;left:12px;z-index:100;color:var(--ink);background:white;padding:12px 20px;border:2px solid var(--brand)}.skip-link:focus,.skip:focus{top:10px}
/* masthead */
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.97);border-bottom:1px solid var(--border);backdrop-filter:blur(12px)}.header-inner{min-height:76px;display:flex;align-items:center;gap:30px;justify-content:space-between}.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;white-space:nowrap;color:var(--ink)}.brand:hover{color:var(--ink)}.brand-mark{display:grid;grid-template-columns:repeat(2,10px);grid-template-rows:repeat(2,10px);gap:3px;background:var(--brand);border-radius:9px;padding:8px;transform:rotate(-5deg)}.brand-mark i{display:block;background:white;border-radius:2px;opacity:.95}.brand-mark i:nth-child(2){opacity:.4}.brand-mark i:nth-child(3){opacity:.65}.brand-name{font-size:19px;letter-spacing:-.045em;font-weight:800;line-height:1;display:flex;align-items:baseline;gap:3px}.brand-name b{color:var(--brand)}.brand-name small{font-size:10px;margin-left:5px;letter-spacing:.09em;color:var(--muted-soft);font-weight:700}.header-nav{display:flex;gap:30px;margin-left:auto}.header-nav a{text-decoration:none;font-size:14px;font-weight:700;color:var(--muted);padding:8px 0}.header-nav a:hover{color:var(--brand)}
.button{border:1px solid transparent;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;gap:20px;min-height:48px;padding:12px 20px;font-size:15px;line-height:1.35;text-align:center;font-weight:800;text-decoration:none;transition:background-color .14s ease,transform .14s ease,box-shadow .14s ease;cursor:pointer}.button:hover{transform:translateY(-1px)}.button-primary{background:var(--brand);color:#fff;box-shadow:0 6px 13px #2255d726}.button-primary:hover{background:var(--brand-hover);color:#fff;box-shadow:0 8px 14px #2255d738}.button-primary:disabled{background:#b0bed3;color:#fff;box-shadow:none;transform:none}.button-secondary{background:#fff;color:var(--muted);border-color:var(--border)}.button-secondary:hover{background:var(--surface-subtle)}.button-secondary:disabled{color:#b2bfd0;background:#f5f7fa;opacity:.68}.nav-cta{font-size:13px;min-height:42px;padding:9px 17px;border-radius:10px}.button-large{min-height:56px;padding:16px 24px}
/* hero and primary workflow */
.hero{background:radial-gradient(circle at 20% -25%,#eaf0ff 0,transparent 50%),var(--background);border-bottom:1px solid var(--border)}.hero-grid{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1fr);gap:58px;align-items:center;padding:68px 0 82px}.hero-copy{min-width:0;padding:15px 0}.eyebrow{display:flex;align-items:center;gap:9px;color:#2f5aa8;font-size:12px;letter-spacing:.09em;font-weight:800}.eyebrow-dot{width:9px;height:9px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 5px var(--brand-soft)}.hero h1{font-size:clamp(36px,4vw,55px);font-weight:850;line-height:1.38;letter-spacing:-.07em;margin:21px 0}.accent-text{color:var(--brand)}.hero-description{font-size:17px;line-height:1.95;max-width:510px;color:var(--muted);margin:0 0 26px}.hero-description strong{color:var(--ink)}.hero-cta-row{display:flex;align-items:center;flex-wrap:wrap;gap:18px;margin:29px 0 30px}.subtle-link{color:var(--brand);font-weight:800;text-decoration:underline;text-underline-offset:5px;font-size:14px}.hero-facts{display:flex;gap:18px;flex-wrap:wrap;color:var(--ink);font-size:13px;font-weight:700}.hero-facts span{display:flex;align-items:center;gap:4px}.hero-facts svg{width:17px;height:17px;fill:none;stroke:var(--green);stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round}.hero-caution{font-size:12px;color:var(--muted-soft);max-width:500px;line-height:1.7;margin:17px 0 0}
.quiz-card{scroll-margin-top:106px;border-radius:22px;background:#fff;box-shadow:var(--shadow);border:1px solid #d5e0ef;padding:30px 32px 26px;min-width:0}.quiz-heading{display:flex;align-items:start;justify-content:space-between;gap:10px}.quiz-overline{color:var(--brand);font-size:12px;font-weight:800}.quiz-heading h2{font-size:20px;line-height:1.45;letter-spacing:-.04em;margin:5px 0 0}.quiz-pill{font-size:10px;background:var(--brand-soft);color:var(--brand);padding:6px 11px;border-radius:30px;font-weight:900;white-space:nowrap}.quiz-progress-meta{display:flex;justify-content:space-between;margin:24px 0 7px;font-size:12px;color:var(--muted);font-weight:750}.progress-track{height:7px;background:#e8eef6;border-radius:20px;overflow:hidden;margin-bottom:24px}.progress-fill{display:block;width:25%;height:100%;background:var(--brand);border-radius:20px;transition:width .2s}.quiz-step{padding:0;border:0;margin:0;min-width:0}.quiz-step legend{font-size:20px;font-weight:850;letter-spacing:-.035em;line-height:1.5;padding:0}.question-help{font-size:13px;line-height:1.7;color:var(--muted);margin:3px 0 17px}.choice-grid{display:grid;gap:10px;grid-template-columns:1fr}.choice-grid.two-col{grid-template-columns:repeat(2,minmax(0,1fr))}.choice{display:block;position:relative;cursor:pointer}.choice input{position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;cursor:pointer}.choice-body{display:grid;grid-template-columns:20px minmax(0,1fr);align-items:center;column-gap:10px;row-gap:3px;min-height:68px;padding:14px 13px;background:#fff;border:1.5px solid var(--border);border-radius:11px;transition:border-color .12s,background-color .12s,box-shadow .12s}.choice-body:hover{border-color:#91a9de;background:#f9fbff}.choice-body b{font-size:15px;color:var(--ink);line-height:1.45}.choice-body small{grid-column:2;color:var(--muted);font-size:11px;line-height:1.5}.choice-dot{height:18px;width:18px;border:2px solid #9bacc2;border-radius:50%;display:block;grid-row:1/span 2;position:relative}.choice input:checked+.choice-body{background:#edf3ff;border-color:var(--brand);box-shadow:inset 0 0 0 1px var(--brand)}.choice input:checked+.choice-body .choice-dot{border-color:var(--brand);background:var(--brand)}.choice input:checked+.choice-body .choice-dot:after{content:'';position:absolute;inset:4px;background:white;border-radius:50%}.choice input:focus-visible+.choice-body{outline:3px solid var(--focus);outline-offset:3px}.quiz-controls{display:grid;grid-template-columns:125px minmax(0,1fr);gap:10px;margin-top:24px;padding-top:19px;border-top:1px solid var(--border)}.quiz-controls .button{min-height:51px}.quiz-error{color:#a2262b;font-size:13px;font-weight:700;margin:12px 0}
/* results */
.result{outline:0}.result-kicker{font-size:13px;font-weight:800;color:var(--brand);margin:7px 0}.result-capacity{display:flex;align-items:baseline;gap:11px;flex-wrap:wrap;margin:4px 0 2px}.result-capacity>span:first-child{font-size:45px;line-height:1.15;font-weight:900;letter-spacing:-.045em;color:var(--brand)}.result-capacity>span:last-child{font-size:16px;color:var(--ink);font-weight:850}.result-note{color:var(--muted);font-size:12px;line-height:1.7;margin:0 0 14px}.result-details{display:grid;gap:8px}.result-details>div{border:1px solid var(--border);background:#f9fbfe;border-radius:10px;padding:12px 15px}.result-details b{font-size:12px;color:#31517d}.result-details p{font-size:12px;line-height:1.75;color:var(--ink);margin:4px 0 0}.result-actions{display:grid;gap:6px;margin-top:15px}.result-offer{min-height:54px;width:100%}.result-alternative{display:block;text-align:center;font-size:13px;color:var(--brand);font-weight:750;padding:8px}.offer-disclosure{font-size:11px;line-height:1.7;color:var(--muted);margin:8px 0}.result-reset{border:0;background:transparent;font-size:12px;font-weight:750;color:var(--muted);text-decoration:underline;text-underline-offset:4px;cursor:pointer;padding:5px 0}.ad-disclosure{margin-top:20px;border:1px solid #b8cbea;background:#eef4ff;border-radius:9px;padding:12px 16px;display:flex;gap:10px;font-size:13px;line-height:1.6}.ad-disclosure strong{font-size:12px;background:var(--brand);color:#fff;padding:0 7px;align-self:flex-start;border-radius:3px}
/* features and articles */
.explain{padding:96px 0 95px}.section-title h2{font-size:clamp(27px,3vw,38px);line-height:1.42;letter-spacing:-.055em;margin:12px 0 14px}.section-title p{color:var(--muted);margin:0;font-size:15px;line-height:1.9}.section-eyebrow{color:var(--brand);font-size:12px;font-weight:850;letter-spacing:.07em}.feature-grid,.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:34px}.feature-card{border:1px solid var(--border);border-radius:16px;padding:28px 25px 25px;background:var(--surface)}.feature-number{color:#8da1c1;font-size:13px;font-weight:800;letter-spacing:.04em}.feature-icon{display:flex;width:47px;height:47px;align-items:center;justify-content:center;font-weight:800;color:var(--brand);background:var(--brand-soft);font-size:24px;border-radius:13px;margin:23px 0 17px}.feature-card h3{font-size:18px;letter-spacing:-.03em;margin:0 0 10px}.feature-card p{font-size:14px;color:var(--muted);line-height:1.85;min-height:96px;margin:0 0 17px}.feature-card a{font-size:14px;font-weight:800;color:var(--brand);text-decoration:underline;text-underline-offset:4px}.reading{background:var(--background);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:84px 0 92px}.small-title h2{margin-bottom:8px}.article-grid{margin-top:30px}.article-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);border-radius:15px;padding:26px;text-decoration:none;min-height:248px;transition:transform .15s,box-shadow .15s}.article-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);color:var(--ink);border-color:#adc0e7}.article-label{font-size:11px;font-weight:800;color:#3c62a1;background:var(--brand-soft);width:fit-content;padding:5px 9px;border-radius:6px}.article-card h3{font-size:18px;line-height:1.6;letter-spacing:-.035em;margin:14px 0 8px}.article-card p{font-size:13px;line-height:1.8;color:var(--muted);margin:0 0 12px}.article-more{margin-top:auto;font-size:14px;font-weight:850;color:var(--brand)}
.faq{padding:92px 0 98px}.faq-list{max-width:900px;margin-top:26px;border-top:1px solid var(--border)}.faq details{border-bottom:1px solid var(--border)}.faq summary{list-style:none;position:relative;cursor:pointer;padding:22px 43px 22px 0;font-size:16px;line-height:1.6;font-weight:750}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:'+';position:absolute;right:12px;top:19px;color:var(--brand);font-size:25px;font-weight:500;line-height:1}.faq details[open] summary:after{content:'−'}.faq details>div{padding:0 35px 22px 0;line-height:1.9;font-size:14px;color:var(--muted)}.bottom-banner{margin-bottom:100px;border-radius:22px;padding:39px 49px;background:var(--dark);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:30px}.bottom-banner h2{line-height:1.5;letter-spacing:-.045em;font-size:30px;margin:8px 0 0}.banner-overline{color:#c8ddff;font-size:12px;font-weight:850}.button-white{background:#fff;color:#163f9c;white-space:nowrap}.button-white:hover{background:#eff3ff;color:#163f9c}
/* footer */
.site-footer,.footer{background:#f5f7fa;border-top:1px solid var(--border);padding:50px 0 0;color:var(--muted)}.footer-main{display:grid;grid-template-columns:1.1fr .8fr 1.2fr;gap:35px;padding-bottom:40px}.footer-main>div:nth-child(2){display:flex;flex-direction:column;align-items:flex-start;gap:4px}.footer-main .brand{color:var(--ink)}.footer-main p{font-size:12px;line-height:1.9;margin-top:12px}.footer-main a:not(.brand){font-size:13px;line-height:2;text-decoration:underline;text-underline-offset:3px}.footer-main .footer-heading{font-size:13px;font-weight:900;color:var(--ink);margin:0 0 8px}.footer-legal{border-top:1px solid var(--border);padding:17px 0;display:flex;justify-content:space-between;gap:15px;font-size:11px}.mobile-action{display:none}
/* article + existing simple information pages */
.topbar{display:none}.header{display:flex;align-items:center;justify-content:space-between;min-height:78px;gap:15px}.header .logo{font-size:17px;text-decoration:none;font-weight:850;letter-spacing:-.045em;white-space:nowrap}.header .logo-icon{display:inline-grid;place-items:center;border-radius:9px;background:var(--brand);width:35px;height:35px;color:white}.header .brand-guide{font-size:11px;color:var(--muted-soft);letter-spacing:.07em}.header nav{display:flex;align-items:center;gap:26px}.header nav a{font-size:13px;text-decoration:none;font-weight:700;color:var(--muted)}.header nav a:hover{color:var(--brand)}.article-wrap{max-width:850px;padding:63px 0 110px;min-height:60vh}.article-wrap h1{font-size:clamp(28px,3.5vw,39px);letter-spacing:-.048em;line-height:1.53;margin:25px 0}.article-wrap h2{font-size:24px;line-height:1.5;margin:47px 0 16px;border-bottom:1px solid var(--border);padding-bottom:12px;letter-spacing:-.04em}.article-wrap h3{font-size:19px;margin-top:30px}.article-wrap p,.article-wrap li{font-size:16px;color:var(--muted);line-height:1.95}.article-wrap strong{color:var(--ink)}.article-wrap a{color:var(--brand);text-underline-offset:4px}.article-wrap ul{padding-left:23px}.article-wrap table{width:100%;border-collapse:collapse;margin:28px 0}.article-wrap th,.article-wrap td{border:1px solid var(--border);padding:14px;text-align:left;font-size:14px}.article-wrap th{background:var(--brand-soft)}.article-meta,.breadcrumb{font-size:12px;color:var(--muted-soft)}.article-intro{font-size:18px!important;color:var(--ink)!important}.article-cta{background:var(--brand-soft);border:1px solid #c5d4f2;border-radius:16px;padding:26px;margin:48px 0}.article-cta h2{border:0;margin:0 0 8px;font-size:23px;padding:0}.article-cta p{margin:0 0 14px}.article-cta a{display:inline-flex;padding:13px 20px;background:var(--brand);color:white;text-decoration:none;border-radius:11px;font-size:14px;font-weight:800}.article-cta a:hover{background:var(--brand-hover)}.ad-inline{background:#f3f7ff;border:1px solid #d6e1f7;border-left:3px solid var(--brand);padding:11px 16px;margin:28px 0;border-radius:7px;font-size:13px!important}.policy{padding:67px 0 110px;max-width:810px;min-height:70vh}.policy h1{font-size:34px;line-height:1.4}.policy h2{font-size:23px;margin:38px 0 14px}.policy p,.policy li{line-height:1.95;color:var(--muted)}.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:12px;padding:20px 0}.footer-bottom a{color:var(--brand)}
@media(max-width:1050px){.hero-grid{gap:27px}.hero h1{font-size:42px}.hero-description{font-size:16px}.quiz-card{padding:25px 23px}.header-nav{gap:16px}}
@media(max-width:800px){.hero-grid{grid-template-columns:1fr;gap:22px;padding:44px 0 60px}.hero-copy{padding:0}.hero h1{font-size:clamp(36px,6vw,49px)}.quiz-card{max-width:650px;width:100%;margin-inline:auto}.hero-description{max-width:640px}.feature-grid,.article-grid{grid-template-columns:1fr}.feature-card p{min-height:0}.feature-card{padding:23px}.article-card{min-height:190px}.footer-main{grid-template-columns:1fr 1fr}.footer-main>div:last-child{grid-column:1/-1}.header-nav{display:none}}
@media(max-width:560px){html{scroll-padding-top:76px}.shell,.wrap{width:min(100% - 32px,1140px)}.header-inner{min-height:66px}.brand-name{font-size:16px}.brand-name small{font-size:9px}.brand-mark{grid-template-columns:repeat(2,8px);grid-template-rows:repeat(2,8px);padding:7px}.nav-cta{font-size:12px;min-height:40px;padding:8px 11px}.hero-grid{padding:33px 0 52px;gap:23px}.hero h1{font-size:34px;margin:16px 0}.hero-description{font-size:15px;margin-bottom:20px}.hero-cta-row{margin:22px 0 21px;gap:12px}.hero-cta-row .button{min-height:52px;width:100%;font-size:14px}.subtle-link{display:inline-block;padding:4px 0}.hero-facts{font-size:11px;gap:10px}.hero-caution{font-size:11px;margin-top:12px}.quiz-card{padding:21px 17px 19px;border-radius:16px;scroll-margin-top:77px}.quiz-heading h2{font-size:17px}.quiz-pill{font-size:9px;padding:4px 7px}.quiz-progress-meta{margin-top:20px}.quiz-step legend{font-size:18px}.question-help{font-size:12px}.choice-grid.two-col{grid-template-columns:1fr}.choice-body{min-height:58px;padding:11px 12px}.choice-body b{font-size:14px}.choice-body small{font-size:11px}.quiz-controls{grid-template-columns:105px 1fr;margin-top:18px}.quiz-controls .button{padding:10px;font-size:14px}.explain,.faq{padding:66px 0}.reading{padding:63px 0}.section-title h2{font-size:28px}.section-title p{font-size:14px}.feature-grid,.article-grid{margin-top:23px;gap:12px}.feature-card,.article-card{padding:21px}.feature-icon{margin:13px 0}.bottom-banner{padding:26px;margin-bottom:70px;display:block;border-radius:16px}.bottom-banner h2{font-size:23px}.bottom-banner .button{margin-top:20px;width:100%}.footer-main{grid-template-columns:1fr;gap:21px;padding-bottom:22px}.footer-main>div:last-child{grid-column:auto}.footer-legal{flex-direction:column;gap:2px}.faq summary{font-size:15px}.header{min-height:64px}.header nav{gap:10px}.header nav a{font-size:11px}.header nav a:last-child{display:none}.article-wrap{padding:28px 0 72px}.article-wrap h1{font-size:26px}.article-wrap h2{font-size:22px}.article-wrap p,.article-wrap li{font-size:15px}.article-wrap th,.article-wrap td{font-size:12px;padding:8px}.mobile-action:not([hidden]){position:fixed;bottom:0;left:0;right:0;display:block;padding:12px 16px max(12px,env(safe-area-inset-bottom));background:rgba(255,255,255,.98);border-top:1px solid var(--border);z-index:15;box-shadow:0 -9px 21px #172b5411}.mobile-action .button{width:100%;min-height:50px}.site-footer,.footer{padding-bottom:68px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}