:root{
  --bg:#f7f6f2; --paper:#fff; --ink:#15201e; --ink2:#4a5754; --muted:#5d6965; --line:#e3e1d9;
  --brand:#0f766e; --brand-d:#0b5a54; --brand-l:#e6f3f1; --accent:#f59e0b; --bad:#c2410c; --good:#15803d; --good-l:#e8f5ec; --bad-l:#fdeee6;
  --r:18px; --shadow:0 1px 2px rgba(0,0,0,.04),0 8px 24px rgba(15,40,35,.06);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans","Noto Sans SC","Noto Sans JP","PingFang SC","Hiragino Sans",sans-serif;overflow-x:hidden}
a{color:var(--brand)}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.narrow{max-width:680px}
h1,h2,h3{line-height:1.25;letter-spacing:-.01em}
h2{font-size:clamp(22px,4.5vw,30px);margin:0 0 18px}

/* header */
.top{position:sticky;top:0;z-index:10;background:rgba(247,246,242,.9);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:58px;flex-wrap:wrap}
.brand{display:inline-flex;align-items:center;gap:9px;font-weight:800;color:var(--ink);text-decoration:none;font-size:17px}
.logo{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:9px;background:var(--brand);color:#fff;font-size:17px;font-weight:700}
.langs{display:flex;gap:4px;flex-wrap:wrap}
.langs a{font-size:13.5px;padding:6px 10px;border-radius:999px;color:var(--ink2);text-decoration:none;border:1px solid transparent;min-height:34px;display:inline-flex;align-items:center}
.langs a[aria-current]{background:var(--paper);border-color:var(--line);color:var(--ink);font-weight:700}

/* hero */
.hero{padding:44px 0 36px;background:radial-gradient(900px 380px at 0% 0%,rgba(15,118,110,.13),transparent 65%),radial-gradient(700px 320px at 100% 10%,rgba(245,158,11,.12),transparent 60%)}
.eyebrow{margin:0 0 10px;font-size:13px;font-weight:700;letter-spacing:.04em;color:var(--brand)}
.hero h1{font-size:clamp(30px,7vw,52px);margin:0 0 16px}
.hl{color:var(--bad)}
.lede{font-size:clamp(16px,2.6vw,19px);color:var(--ink2);max-width:640px;margin:0 0 24px}
.cta-sub{font-size:13.5px;color:var(--muted);margin:10px 0 0}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:30px;max-width:720px}
.stat{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:14px 12px;box-shadow:var(--shadow);min-width:0}
.stat b{display:block;font-size:clamp(16px,3.6vw,24px);letter-spacing:-.02em;white-space:nowrap}
.stat span{font-size:12.5px;color:var(--muted);line-height:1.35;display:block;margin-top:2px}
.stat-bad b{color:var(--bad)}
.note{font-size:12px;color:var(--muted);margin:10px 0 0}

/* buttons */
.btn{appearance:none;border:0;border-radius:14px;font:inherit;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;min-height:48px;padding:12px 20px;transition:transform .08s,background .15s,box-shadow .15s}
.btn:active{transform:scale(.98)}
.btn:focus-visible{outline:3px solid rgba(15,118,110,.45);outline-offset:2px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(15,118,110,.25)}
.btn-primary:hover{background:var(--brand-d)}
.btn-lg{font-size:18px;padding:16px 26px;min-height:56px}
.btn-ghost{background:var(--paper);color:var(--ink);border:1px solid var(--line)}
.btn-block{width:100%}

/* cards */
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:var(--shadow)}

/* quiz */
.quiz-sec{padding:34px 0;scroll-margin-top:60px}
.progress{height:6px;background:var(--brand-l);border-radius:99px;overflow:hidden;margin-bottom:16px}
.progress-bar{height:100%;width:0;background:var(--brand);border-radius:99px;transition:width .3s}
.qlabel{margin:0 0 8px;font-size:13px;font-weight:700;color:var(--brand)}
.qtext{font-size:clamp(18px,3.6vw,21px);font-weight:650;margin:0 0 12px;line-height:1.5}
.ja{margin:0 0 18px;font-size:14px;color:var(--ink2)}
.ja summary{cursor:pointer;color:var(--muted);font-size:13px;min-height:28px}
.ja p{margin:6px 0 0;padding:10px 12px;background:var(--bg);border-radius:10px}
.answers{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.btn-ans{background:var(--paper);color:var(--ink);border:2px solid var(--line);font-size:18px;min-height:60px}
.btn-ans:hover:not(:disabled){border-color:var(--brand)}
.btn-ans:disabled{cursor:default}
.btn-ans.is-right{border-color:var(--good);background:var(--good-l);color:var(--good)}
.btn-ans.is-wrong{border-color:var(--bad);background:var(--bad-l);color:var(--bad)}
.feedback{margin-top:18px;padding-top:16px;border-top:1px dashed var(--line)}
.fb-title{font-weight:800;margin:0 0 6px;font-size:17px}
.fb-title.ok{color:var(--good)} .fb-title.ng{color:var(--bad)}
.fb-ex{margin:0 0 8px;color:var(--ink)}
.fb-ja{margin:0 0 16px;font-size:13.5px;color:var(--muted)}

/* result */
.result{text-align:center}
.score{font-size:64px;font-weight:800;letter-spacing:-.03em;line-height:1;margin:6px 0 4px}
.score.pass{color:var(--good)} .score.fail{color:var(--bad)}
.score-sub{color:var(--muted);margin:0 0 12px}
.verdict{font-size:16.5px;max-width:520px;margin:0 auto 18px}
.row-btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:26px}
.waitlist{text-align:left;background:var(--brand-l);border-radius:16px;padding:20px}
.waitlist h2{font-size:21px;margin:0 0 6px}
.waitlist>p{margin:0 0 14px;color:var(--ink2);font-size:15px}
.field{display:block;margin-bottom:12px}
.field span{display:block;font-size:13.5px;font-weight:700;margin-bottom:5px}
.field input,.field select{width:100%;font:inherit;font-size:16px;padding:12px 14px;border:1px solid #c9d8d5;border-radius:12px;background:#fff;color:var(--ink);min-height:48px}
.field input:focus,.field select:focus{outline:3px solid rgba(15,118,110,.3);border-color:var(--brand)}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.wl-msg{min-height:1.2em;margin:10px 0 0;font-weight:700;font-size:14.5px}
.wl-msg.ok{color:var(--good)} .wl-msg.ng{color:var(--bad)}
.privacy{font-size:12.5px;color:var(--muted);margin:8px 0 0}

/* sections */
.changes{padding:40px 0}
.grid3{display:grid;gap:14px}
@media(min-width:760px){.grid3{grid-template-columns:repeat(3,1fr)}}
.grid3 h3{margin:10px 0 6px;font-size:17px}
.grid3 p{margin:0;color:var(--ink2);font-size:15px}
.num{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:9px;background:var(--brand-l);color:var(--brand);font-weight:800}
.faq{padding:10px 0 44px}
.faq details{margin-bottom:10px;padding:16px 20px}
.faq summary{cursor:pointer;font-weight:700;min-height:28px}
.faq details p{margin:10px 0 0;color:var(--ink2)}
.foot{border-top:1px solid var(--line);padding:26px 0 40px;font-size:13px;color:var(--muted)}
.foot .langs{margin-bottom:10px}

/* root picker */
.picker{min-height:100vh;display:flex;align-items:center;background:radial-gradient(900px 380px at 0% 0%,rgba(15,118,110,.13),transparent 65%)}
.picker-in{padding:40px 20px;text-align:center}
.brand.big{font-size:26px}.brand.big .logo{width:42px;height:42px;font-size:24px;border-radius:12px}
.picker-sub{color:var(--muted);margin:8px 0 26px}
.pick-list{display:grid;gap:12px;text-align:left}
.pick{display:block;text-decoration:none;color:var(--ink)}
.pick b{display:block;font-size:18px}
.pick span{color:var(--ink2);font-size:15px}
.pick:hover{border-color:var(--brand)}

@media(max-width:560px){
  .top{position:static}
  .stats{grid-template-columns:1fr 1fr}
  .stat-bad{grid-column:1 / -1}
}
@media(max-width:420px){
  .card{padding:18px}
  .stat{padding:12px 9px}
  .stat span{font-size:11.5px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.progress-bar,.btn{transition:none}}