:root{
  --bg:#f5f6f8;--card:#ffffff;--text:#17202a;--muted:#647180;--line:#dfe4ea;
  --accent:#202c3a;--accent2:#34475c;--soft:#eef2f6;--danger:#9f2d2d;
  --radius:18px;--shadow:0 12px 34px rgba(25,35,45,.08);
}
*{box-sizing:border-box}
html{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text)}
body{margin:0;line-height:1.55}
button,input,select,textarea{font:inherit}
button{cursor:pointer;min-height:44px}
a{color:inherit}
.shell{max-width:960px;margin:0 auto;padding:24px 18px 60px}
.site-header{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:28px}
.brand{font-weight:800;color:var(--text);text-decoration:none;letter-spacing:-.03em}
.study-tag{font-size:.84rem;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:5px 10px;background:#fff;text-align:center}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:34px}
.intro{padding:52px}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.77rem;font-weight:800;color:var(--accent2);margin:0 0 12px}
h1,h2{letter-spacing:-.035em;line-height:1.08;margin:0}
h1{font-size:clamp(2.1rem,6vw,3.65rem);max-width:820px}
h2{font-size:clamp(1.65rem,4vw,2.45rem);margin-bottom:32px}
.lede{font-size:1.16rem;color:var(--muted);max-width:780px;margin:22px 0 30px}
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:28px 0}
.facts div{background:var(--soft);padding:18px;border-radius:14px}
.facts strong,.facts span{display:block}.facts strong{font-size:1.05rem}.facts span{color:var(--muted);font-size:.86rem;margin-top:4px}
.notice{border-left:4px solid var(--accent2);background:var(--soft);padding:16px 18px;border-radius:10px;margin:24px 0;color:#34404d}
.notice p{margin:5px 0 0}.notice.subtle{font-size:.9rem}
.privacy-details{border:1px solid var(--line);border-radius:12px;background:#fff;margin:22px 0}
.privacy-details summary{cursor:pointer;font-weight:800;padding:15px 16px}
.privacy-copy{border-top:1px solid var(--line);padding:4px 16px 14px;color:#34404d;font-size:.92rem}
.privacy-copy p{margin:12px 0}
.consent-row{display:flex;gap:12px;align-items:flex-start;margin:25px 0}.consent-row input{margin-top:5px;flex:0 0 auto}
.consent-row.compact{margin:8px 0 24px;padding:14px;border:1px solid var(--line);border-radius:11px;background:#fff}
.primary,.secondary{border:0;border-radius:12px;padding:12px 18px;font-weight:800}
.primary{background:var(--accent);color:white}.primary:hover{background:var(--accent2)}.primary:disabled{opacity:.45;cursor:not-allowed}
.secondary{background:var(--soft);color:var(--text);border:1px solid var(--line)}
.progress-wrap{margin:22px 2px 16px}.progress-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:.9rem;margin-bottom:8px}
.progress-track{height:8px;background:#e1e6ec;border-radius:999px;overflow:hidden}.progress-bar{height:100%;background:var(--accent);width:14%;transition:width .2s}
fieldset{border:0;padding:0;margin:0 0 30px}legend,.question>span{display:block;font-weight:800;margin-bottom:12px}
.question-help{color:var(--muted);font-size:.92rem;margin:-2px 0 16px}
.choices{display:grid;gap:10px}.choices.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.choices label,.scale label,.standalone-choice{display:flex;align-items:flex-start;gap:10px;padding:11px 12px;border:1px solid var(--line);border-radius:11px;background:#fff}
.choices label:hover,.scale label:hover,.standalone-choice:hover{background:#fafbfd}
.choices input,.scale input,.standalone-choice input{margin-top:4px;flex:0 0 auto}
.standalone-choice{margin-top:12px;font-weight:700}
.other{display:flex;align-items:center;gap:10px;margin-top:10px;color:var(--muted)}
.other input{flex:1}
.question{display:block;margin:0 0 28px}
input[type=text],input[type=email],select,textarea{width:100%;border:1px solid #cfd7df;border-radius:11px;padding:11px 12px;background:#fff;color:var(--text);min-height:44px}
input:focus,select:focus,textarea:focus,button:focus-visible,summary:focus-visible{outline:3px solid rgba(52,71,92,.18);outline-offset:2px;border-color:var(--accent2)}
textarea{resize:vertical;min-height:92px}
.scale{display:flex;flex-wrap:wrap;gap:9px}.scale label{flex:1 1 140px;justify-content:flex-start}
.responsibility-list{display:grid;gap:10px}
.responsibility-row{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(220px,.65fr);gap:18px;align-items:center;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:#fff}
.responsibility-row>span{font-weight:700}
.responsibility-row select{margin:0}
.req{color:var(--danger)}.hint{font-weight:400;color:var(--muted);font-size:.9rem}
.form-nav{display:flex;justify-content:space-between;gap:12px;padding:18px 2px 0}.form-nav .primary{margin-left:auto}
.form-error{background:#fff0f0;border:1px solid #efcaca;color:var(--danger);border-radius:10px;padding:12px 14px;margin-top:16px}
.review-note{color:var(--muted);font-size:.92rem;background:var(--soft);border-radius:10px;padding:14px}
.response-id{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--soft);display:inline-block;padding:10px 13px;border-radius:9px}
.contact-status{background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin:16px 0}
.contact-status.contact-error{background:#fff8e8;border-color:#e8cf95;color:#6d531a}
footer{display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:.78rem;margin-top:20px;padding:0 4px}
.hidden{display:none!important}.trap{position:absolute!important;left:-9999px!important;width:1px;height:1px;overflow:hidden}
.invalid{border-color:var(--danger)!important;box-shadow:0 0 0 2px rgba(159,45,45,.08)}
fieldset.invalid-group{border:1px solid #efcaca;border-radius:12px;padding:12px;background:#fffafa}
[data-stage-option][hidden]{display:none!important}
@media(max-width:720px){
  .shell{padding:14px 12px 40px}.card,.intro{padding:24px}.facts,.choices.two{grid-template-columns:1fr}
  .facts{gap:8px}.scale{display:grid;grid-template-columns:1fr}.scale label{justify-content:flex-start}
  .responsibility-row{grid-template-columns:1fr;gap:8px;padding:13px}
  footer{flex-direction:column}.form-nav{position:sticky;bottom:0;background:rgba(245,246,248,.97);padding:12px 0 calc(12px + env(safe-area-inset-bottom));z-index:5;border-top:1px solid rgba(223,228,234,.8)}
  .form-nav button{flex:1}.form-nav .primary{margin-left:0}.site-header{align-items:flex-start}.study-tag{max-width:58%}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}