:root{--bg:#fff;--surface:#f7f8fa;--fg:#0f1419;--mut:#5b6670;--bd:#e6e8eb;--bd2:#d3d8dd;--ac:#2563eb;--ac-h:#1d4ed8;--acf:#fff;--soft:#2563eb14;--hdr:rgba(255,255,255,.82);--pad:clamp(48px,8vw,96px);--gx:20px;--ease:cubic-bezier(.2,.8,.2,1);--sh:0 12px 32px -12px rgba(15,20,25,.18)}
@media(prefers-color-scheme:dark){:root{--bg:#0a0a0b;--surface:#141518;--fg:#eceef0;--mut:#9aa3ab;--bd:#26282c;--bd2:#383b40;--ac:#60a5fa;--ac-h:#93c5fd;--acf:#0a0a0b;--soft:#60a5fa1f;--hdr:rgba(10,10,11,.8);--sh:0 12px 32px -12px rgba(0,0,0,.7)}}
@media(min-width:720px){:root{--gx:32px}}
*{box-sizing:border-box}html{color-scheme:light dark;-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;font-family:system-ui,-apple-system,"Hiragino Sans","Noto Sans JP","Segoe UI",sans-serif;font-size:1rem;color:var(--fg);line-height:1.85;background:var(--bg);padding-bottom:calc(64px + env(safe-area-inset-bottom))}
@media(min-width:720px){body{font-size:1.0625rem;padding-bottom:0}}
a{color:var(--ac);text-underline-offset:.2em}a:hover{color:var(--ac-h)}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--ac);outline-offset:2px;border-radius:8px}
h1,h2,h3{margin:0 0 .6em;font-feature-settings:"palt"}
h1{font-size:clamp(2rem,1.2rem + 3.6vw,3.5rem);line-height:1.2;letter-spacing:-.02em;font-weight:800}
h2{font-size:clamp(1.4rem,1.1rem + 1.2vw,2rem);line-height:1.35;letter-spacing:-.01em;font-weight:700}
h3{font-size:1.15rem;line-height:1.5;font-weight:700}
p{margin:0 0 1.2em;max-width:68ch}
.small,small{font-size:.875rem;color:var(--mut)}
/* layout: every section spans full width, content is centered to 1120px */
section{padding:var(--pad) max(var(--gx),calc((100% - 1120px)/2))}
section>h2{margin-bottom:clamp(24px,4vw,40px)}
.narrow{max-width:720px;margin:0 auto;padding:clamp(32px,6vw,64px) var(--gx) var(--pad)}
section.narrow{padding:clamp(32px,6vw,64px) var(--gx) var(--pad)}
.alt{background:var(--surface);border-block:1px solid var(--bd)}
/* header */
.nav{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;align-items:center;gap:8px;min-height:64px;padding:8px max(var(--gx),calc((100% - 1120px)/2));background:var(--hdr);-webkit-backdrop-filter:saturate(180%) blur(16px);backdrop-filter:saturate(180%) blur(16px);border-bottom:1px solid var(--bd)}
.logo{display:inline-flex;align-items:center;min-height:44px;font-weight:800;font-size:1.1rem;letter-spacing:-.01em;color:var(--fg);text-decoration:none}.logo:hover{color:var(--fg)}
.nav nav{display:flex;gap:4px;align-items:center}
.nav nav a{display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border-radius:999px;font-size:.95rem;font-weight:600;color:var(--mut);text-decoration:none;white-space:nowrap}.nav nav a:hover{color:var(--fg);background:var(--soft)}
.nav nav a.btn{min-height:44px;margin-left:8px;color:var(--acf)}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 28px;border-radius:999px;border:1px solid transparent;font-family:inherit;font-weight:700;font-size:1rem;line-height:1.4;max-width:100%;white-space:normal;overflow-wrap:anywhere;padding-block:12px;text-align:center;text-decoration:none;cursor:pointer;background:var(--ac);color:var(--acf)}
.cta,.cta:hover{color:var(--acf)!important}.cta{background:var(--ac)}.cta:hover{background:var(--ac-h)}
.ghost{background:transparent;border-color:var(--bd2);color:var(--fg)}.ghost:hover{background:var(--soft);border-color:var(--ac);color:var(--fg)}
.sm{min-height:44px;padding:0 20px;font-size:.9rem}.big{min-height:56px;padding:0 36px;font-size:1.0625rem}
/* hero */
.hero{position:relative;text-align:center;padding:clamp(64px,12vw,128px) var(--gx) clamp(56px,9vw,104px);background:radial-gradient(ellipse 80% 60% at 50% 0,var(--soft),transparent 70%);overflow:hidden}
.hero>*{margin-left:auto;margin-right:auto}.hero h1{max-width:18em;margin-bottom:.5em}.hero p{max-width:36em}
.hero p:not(.small){font-size:clamp(1rem,.95rem + .3vw,1.1875rem);color:var(--mut)}
.ctas{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin:32px 0 16px}
.hero .small{margin:0 auto}
/* cards */
.grid3,.feed{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr))}
.card{display:block;background:var(--bg);border:1px solid var(--bd);border-radius:16px;padding:24px;color:inherit;text-decoration:none;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.alt .card{background:var(--bg)}
.card h3{margin:0 0 8px}.card p{margin:0;color:var(--mut);font-size:.9375rem;line-height:1.75}.card small{display:block;margin-bottom:8px}
.art{display:flex;flex-direction:column}.art h3{color:var(--fg)}
.art:hover{transform:translateY(-4px);box-shadow:var(--sh);border-color:var(--ac)}
.grid3 .card{border-radius:16px}
.alt>p:last-child,section>p>a{font-weight:600}
.box{background:var(--bg);border:1px solid var(--bd);border-radius:16px;padding:clamp(20px,4vw,32px);margin:32px 0}
.cta-box{background:var(--surface);text-align:center}.cta-box p{margin-inline:auto}
.cta-box .btn{margin-top:4px}
.inline-sub{background:var(--surface)}.inline-sub b{display:block;margin-bottom:12px}
.final{text-align:center}.final>*{margin-inline:auto}.final p{max-width:40em}
/* forms */
form.sub{display:grid;gap:16px;max-width:520px}.final form,.cta-box form,.box form{margin-inline:auto}
input[type=email]{width:100%;min-height:48px;padding:0 16px;border:1px solid var(--bd2);border-radius:12px;font:inherit;font-size:1rem;background:var(--bg);color:var(--fg)}
input[type=email]:focus{border-color:var(--ac);outline:2px solid var(--soft)}
.consent{display:flex;gap:12px;align-items:flex-start;font-size:.875rem;line-height:1.7;color:var(--mut);text-align:left}
.consent input{flex:none;width:20px;height:20px;margin:3px 0 0;accent-color:var(--ac)}
form.sub .btn{width:100%}.submsg{margin:0;min-height:1.5em}
/* footer */
footer{padding:48px max(var(--gx),calc((100% - 1120px)/2)) 32px;font-size:.9rem;color:var(--mut);border-top:1px solid var(--bd);background:var(--surface)}
footer p{max-width:none}footer a{color:var(--fg)}footer p a{display:inline-block;padding:10px 4px}
.recruit{margin:0 0 32px;padding:clamp(20px,4vw,32px);border:1px solid var(--bd);border-radius:16px;background:var(--bg);color:var(--fg);line-height:1.8}
.recruit b{display:block;font-size:1.15rem;margin-bottom:4px}
.recruit a.cta{display:inline-flex;align-items:center;min-height:44px;margin-top:12px;padding:0 20px;border-radius:999px;font-weight:700;text-decoration:none;background:var(--ac);color:var(--acf)}
.recruit a.cta:hover{background:var(--ac-h)}
/* quiz: one question per screen */
.prog{position:sticky;top:64px;height:4px;margin:0 0 24px;background:var(--bd);border-radius:2px;overflow:hidden;z-index:2}
.prog span{display:block;height:100%;background:var(--ac);border-radius:2px}
#quiz h2{margin:8px 0 24px;font-size:clamp(1.3rem,1.05rem + 1.2vw,1.75rem)}
.opts{display:grid;gap:12px}
.opt{display:block;width:100%;min-height:64px;padding:16px 20px;border:1px solid var(--bd2);border-radius:16px;background:var(--bg);color:var(--fg);font:inherit;font-size:1.0625rem;line-height:1.6;text-align:left;cursor:pointer;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.opt:hover{border-color:var(--ac);background:var(--soft)}
.link{background:none;border:0;color:var(--mut);cursor:pointer;margin-top:16px;min-height:44px;padding:0 12px 0 0;font:inherit;font-size:.95rem}.link:hover{color:var(--ac)}
.score{display:flex;gap:24px;align-items:center;background:var(--surface);border:1px solid var(--bd);padding:clamp(24px,4vw,40px);border-radius:16px;margin-bottom:32px}
.score p{margin:.4em 0 0}
.num{flex:none;font-size:clamp(3.5rem,2.5rem + 5vw,5.5rem);font-weight:800;line-height:1;letter-spacing:-.03em;color:var(--ac);font-variant-numeric:tabular-nums}.num small{font-size:1rem;letter-spacing:0;margin-left:4px;color:var(--mut)}
#result{scroll-margin-top:80px}#result h3{margin-top:2em}#result ul,#result ol{padding-left:1.4em;margin:0 0 1.2em}#result li{margin-bottom:.5em}
/* article */
article.narrow{padding-top:clamp(32px,6vw,64px)}
article h1{font-size:clamp(1.75rem,1.2rem + 2.6vw,2.5rem);margin:.3em 0 1em}
article h2{margin-top:2.2em;padding-bottom:.4em;border-bottom:1px solid var(--bd)}
article p,article li{max-width:68ch}article ul,article ol{padding-left:1.4em;margin:0 0 1.2em}article li{margin-bottom:.4em}
article h3{margin-top:1.8em}
article table{border-collapse:collapse;display:block;overflow-x:auto;margin:0 0 1.2em}article td,article th{border:1px solid var(--bd2);padding:8px 12px;font-size:.95rem}article th{background:var(--surface)}
article img{max-width:100%;height:auto;border-radius:12px}
article blockquote{margin:1.2em 0;padding:4px 20px;border-left:3px solid var(--ac);color:var(--mut)}
article>h3:last-of-type{margin-top:2.4em}
article .feed{margin-top:16px}
.ext{width:100%;border-collapse:collapse;font-size:.9rem;margin:8px 0 16px}.ext th,.ext td{border:1px solid var(--bd2);padding:8px 10px;vertical-align:top;text-align:left}.ext th{background:var(--surface)}
.tabs{display:none}
@media(max-width:640px){
.nav nav a:not(.btn){display:none}.nav nav a.btn{margin-left:0}.score{flex-direction:column;text-align:center;gap:8px}.ext{display:block;overflow-x:auto}
.ctas .btn{width:100%}
.tabs{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:6;background:var(--hdr);-webkit-backdrop-filter:saturate(180%) blur(16px);backdrop-filter:saturate(180%) blur(16px);border-top:1px solid var(--bd);padding-bottom:env(safe-area-inset-bottom)}
.tabs a{flex:1;min-height:56px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:.6875rem;font-weight:600;color:var(--mut);text-decoration:none}.tabs a:hover,.tabs a:active{color:var(--ac)}
.tabs svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}}
#result:focus,.question h2:focus{outline:none}

/* Motion: compositor properties only; enhancement is armed after observation. */
.js .reveal-ready{opacity:0;transform:translateY(14px);transition:opacity .4s var(--ease) var(--delay,0ms),transform .4s var(--ease) var(--delay,0ms)}
.js .reveal-ready.revealed{opacity:1;transform:none}
.btn,.recruit a.cta,.link,.tabs a,.nav nav a{transition:transform .2s var(--ease),opacity .2s var(--ease)}
@media(hover:hover){.btn:hover,.recruit a.cta:hover,.link:hover,.tabs a:hover,.nav nav a:hover{transform:translateY(-2px)}.card:hover,.opt:hover{transform:translateY(-3px)}}
.btn:active,.card:active,.opt:active,.link:active,.tabs a:active,.nav nav a:active,.recruit a.cta:active{transform:scale(.97)!important;transition-duration:120ms}
.prog span{width:100%;transform:scaleX(0);transform-origin:left;transition:transform .4s var(--ease)}
.question{transition:opacity .16s var(--ease),transform .16s var(--ease)}
.question.leaving{opacity:0;transform:translateX(-14px)}
.question>*{animation:question-in .32s var(--ease) backwards}
.question .opts>*{animation:question-in .32s var(--ease) backwards}
.question .opts>:nth-child(2){animation-delay:60ms}.question .opts>:nth-child(3){animation-delay:120ms}.question .opts>:nth-child(4){animation-delay:180ms}.question .opts>:nth-child(5){animation-delay:240ms}
@keyframes question-in{from{opacity:0;transform:translateX(14px)}to{opacity:1;transform:none}}
.score-num{display:inline-block;min-width:1.8em;text-align:right}
.hero{isolation:isolate}.hero::before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(ellipse at 40% 30%,var(--soft),transparent 65%);animation:hero-drift 24s ease-in-out infinite alternate}
@media print{.js .reveal-ready{opacity:1!important;transform:none!important;transition:none!important}}
@keyframes hero-drift{to{transform:translate3d(4%,3%,0) scale(1.06)}}
@media(prefers-reduced-motion:reduce){.js .reveal-ready,.question.leaving{opacity:1;transform:none}*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* Keep long content and controls within narrow screens. */
main, .card, .score>div, .nav nav{min-width:0}
main,footer{overflow-wrap:anywhere}
.btn:disabled{cursor:wait;opacity:.7}
.consent{min-height:44px;cursor:pointer}
.consent a{display:inline-block;min-height:44px;padding-block:10px}
section>p>a{display:inline-block;min-height:44px;padding-block:8px}
article.narrow p a[data-ev^="cluster_"]{font-weight:600;text-decoration-thickness:2px;padding-block:6px}
#quiz{min-height:440px}
@media(max-width:640px){.nav nav a.btn{padding-inline:16px}.tabs a{font-size:.75rem}.logo{font-size:1rem}}
.share{margin:12px 0 0;text-align:center}.btn.pill.share-x{gap:8px;min-height:44px;padding:0 20px;background:#0f1419;color:#fff}.btn.pill.share-x:hover{opacity:.85}@media(prefers-color-scheme:dark){.btn.pill.share-x{background:#eff3f4;color:#0f1419}}
.logo{display:inline-flex;align-items:center;gap:8px}.logo .mark{width:20px;height:20px;fill:var(--ac)}
/* signup / balanced blocks */
:root{--pad:clamp(40px,6vw,72px)}
.sub-sec{padding-block:clamp(24px,4vw,48px)}
.signup{display:grid;gap:clamp(20px,3vw,40px);align-items:center;max-width:960px;margin:0 auto;padding:clamp(24px,4vw,40px);border:1px solid var(--bd);border-radius:20px;background:var(--surface)}
.signup h2{margin:0 0 8px}.signup-copy p{margin:0;color:var(--mut)}
.signup form.sub{max-width:none;width:100%;margin:0}
@media(min-width:860px){.signup{grid-template-columns:1fr 1fr}}
.inline-sub form.sub,#report-signup form.sub{max-width:none}
#report-signup{text-align:left}
.recruit{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;max-width:1120px;margin-inline:auto}
.recruit b{flex-basis:100%}.recruit a.cta{margin-top:0}
.final{padding-block:clamp(40px,6vw,64px)}