.study-shell{padding-top:44px;padding-bottom:64px;min-height:72vh}
.study-live{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.study-brand{gap:10px}.study-brand strong{font-size:25px;letter-spacing:2px}.study-brand span{font-size:11px!important;letter-spacing:1px;color:var(--muted)}
.study-intro{display:grid;grid-template-columns:minmax(0,.92fr) minmax(420px,.78fr);gap:clamp(36px,7vw,96px);align-items:start}
.study-intro-copy{padding-top:30px}.study-intro-copy h1{font-size:clamp(44px,5vw,68px);margin-bottom:24px}.study-lead{font-size:17px;line-height:1.95;color:var(--muted);max-width:38em}
.study-safety-note{margin-top:30px;border-left:4px solid var(--olive);padding:15px 18px;background:#e9edde}.study-safety-note strong{display:block;font-size:14px;margin-bottom:5px}.study-safety-note p{font-size:13px;color:#495244;margin:0;line-height:1.8}
.study-consent-card{border:1px solid var(--ink);background:var(--white);padding:30px;box-shadow:8px 8px 0 #dfe1d5}.study-card-kicker{font-size:11px;letter-spacing:1.3px;font-weight:750;color:var(--clay);margin-bottom:8px}.study-consent-card h2{font-size:28px;margin-bottom:14px}.study-consent-card>p:not(.study-card-kicker){font-size:13px;color:var(--muted);line-height:1.85}.study-prototype-warning{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 0;margin:19px 0!important}.study-prototype-warning strong{color:var(--ink)}
.study-check{display:grid;grid-template-columns:22px 1fr;gap:10px;align-items:start;padding:10px 0;font-size:13px;line-height:1.7}.study-check input{width:19px;height:19px;margin:2px 0 0;accent-color:var(--olive)}
.study-entry-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.study-button{min-height:48px;border:1px solid var(--ink);padding:11px 16px;display:inline-flex;align-items:center;justify-content:center;font:inherit;font-size:13px;font-weight:700;line-height:1.4;text-align:center;text-decoration:none}.study-button:hover{text-decoration:none}.study-button-dark{background:var(--ink);color:var(--white)}.study-button-dark:hover{background:var(--olive)}.study-button-light{background:transparent;color:var(--ink)}.study-button-light:hover{background:var(--yellow)}.study-button[disabled]{opacity:.45;cursor:not-allowed}
.study-review-tools{margin-top:22px;border-top:1px dashed var(--line);padding-top:14px;font-size:12px;color:var(--muted)}.study-review-tools summary{min-height:44px;display:flex;align-items:center;cursor:pointer;color:var(--ink);font-weight:700}.study-review-tools>p{line-height:1.75}.study-condition-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.study-condition-grid label{display:flex;align-items:center;gap:7px;min-height:40px;border:1px solid var(--line);padding:6px 9px;background:var(--paper)}
.study-workspace{max-width:980px;margin:0 auto}.study-run-header{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:12px}.study-sim-label{font-size:12px;font-weight:750;margin:0;color:var(--olive)}.study-sim-label span{font-size:9px;margin-right:5px}.study-progress-copy{font-size:11px;color:var(--muted);margin:3px 0 0}.study-exit{min-height:44px;border:0;border-bottom:1px solid var(--ink);background:transparent;padding:8px 2px;font:inherit;font-size:12px;color:var(--ink)}
.study-progress{height:5px;background:#e4e4da;margin-bottom:28px;overflow:hidden}.study-progress span{display:block;height:100%;width:25%;background:var(--olive);transition:width .25s ease}
.study-stage-card{border:1px solid var(--line);background:var(--white);min-height:560px}.study-stage-heading{padding:28px 32px 20px;border-bottom:1px solid var(--line)}.study-stage-heading .study-card-kicker{margin-bottom:7px}.study-stage-heading h2{font-size:30px;margin:0 0 8px}.study-stage-heading p:last-child{font-size:13px;color:var(--muted);margin:0;max-width:58em}
.chat-window{display:grid;grid-template-rows:auto 1fr auto;max-width:700px;margin:30px auto 0;border:1px solid #bfc3b7;background:#f2f1e9;box-shadow:6px 6px 0 #d9dbd0;min-height:610px}.chat-header{display:flex;align-items:center;gap:13px;background:#fbfaf5;border-bottom:1px solid #d5d7cd;padding:15px 18px}.chat-back{font-size:23px;color:#4f554d}.chat-group-avatar{width:43px;height:43px;border-radius:11px;background:#596c4d;color:white;display:grid;place-items:center;font-size:14px;font-weight:800}.chat-header-copy{min-width:0}.chat-header-copy strong{display:block;font-size:15px}.chat-header-copy span{font-size:11px;color:#777b71}.chat-menu{margin-left:auto;font-size:21px;letter-spacing:2px;color:#666b62}.chat-body{padding:22px 17px 24px;overflow:auto}.chat-time{text-align:center;font-size:10px;color:#888d84;margin:0 0 18px}.chat-message{display:grid;grid-template-columns:38px minmax(0,1fr);gap:9px;margin:0 0 16px;align-items:start}.chat-avatar{width:38px;height:38px;border-radius:8px;background:#ddc981;display:grid;place-items:center;font-size:12px;font-weight:800;color:#3b3d36}.chat-avatar.peer-a{background:#d9b9a9}.chat-avatar.peer-b{background:#aec3b0}.chat-message-copy{max-width:490px}.chat-name{display:flex;align-items:center;gap:9px;font-size:10px;color:#71766d;margin:0 0 4px}.chat-name time{color:#9a9e97}.chat-bubble{display:inline-block;background:#fff;border:1px solid #e0e1da;border-radius:4px 13px 13px 13px;padding:10px 13px;font-size:14px;line-height:1.65;color:#2f332e;box-shadow:0 1px 1px #2328200b}.chat-bubble mark{background:#efe1a7;padding:0 2px;color:inherit}.chat-link-card{display:block;width:min(360px,100%);margin-top:7px;border:1px solid #c6c9be;background:#fff;padding:13px;text-align:left;color:inherit}.chat-link-card:hover{border-color:var(--olive);background:#fbfaef}.chat-link-domain{font-size:9px;color:#81867c;letter-spacing:.3px}.chat-link-card strong{display:block;font-size:14px;margin:4px 0}.chat-link-card span:last-child{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:#686e64}.chat-link-card b{font-size:18px;font-weight:400}.chat-composer{display:flex;align-items:center;gap:9px;background:#fbfaf5;border-top:1px solid #d5d7cd;padding:11px 13px}.chat-composer span{width:30px;height:30px;border:1px solid #b8bcb1;border-radius:50%;display:grid;place-items:center;color:#6a6f65}.chat-composer div{height:38px;flex:1;background:#fff;border:1px solid #d8dad2;border-radius:5px}
.chat-alternative-actions{max-width:700px;margin:0 auto 30px;border:1px solid #bfc3b7;border-top:0;background:#fbfaf5;padding:10px 14px;display:flex;align-items:center;flex-wrap:wrap;gap:6px 16px}.chat-alternative-actions>span{font-size:10px;color:var(--muted);margin-right:2px}.chat-alternative-actions button{min-height:44px;border:0;border-bottom:1px solid #8e9388;background:transparent;padding:7px 1px;font:inherit;font-size:12px;color:var(--ink)}.chat-alternative-actions button:hover{border-color:var(--ink);background:#f2ecd7}.study-action-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.study-action{min-height:54px;border:1px solid var(--ink);background:var(--white);padding:10px 14px;text-align:left;font:inherit;font-size:13px;font-weight:650;color:var(--ink)}.study-action:hover{background:var(--yellow)}.study-action small{display:block;font-size:10px;color:var(--muted);font-weight:400;margin-top:3px}
.mock-browser{max-width:760px;margin:30px auto;border:1px solid #b8bcb2;background:#fff;box-shadow:6px 6px 0 #d9dbd0}.mock-browser-bar{display:flex;align-items:center;gap:9px;padding:7px 9px;border-bottom:1px solid #d5d7cd;background:#ecece6}.mock-browser-dots{display:flex;gap:5px}.mock-browser-dots i{width:8px;height:8px;border-radius:50%;background:#b7bbb1}.mock-browser-control{width:44px;height:44px;border:0;background:transparent;display:grid;place-items:center;font:inherit;font-size:22px;color:#555b52}.mock-browser-control:hover{background:#dedfd7}.mock-address{flex:1;border:1px solid #d1d3ca;background:#fff;padding:6px 10px;font-size:10px;color:#6b7067;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mock-page{padding:26px 28px}.mock-page-brand{display:flex;align-items:center;gap:9px;border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:22px}.mock-page-brand span{width:34px;height:34px;background:#5e704f;color:white;display:grid;place-items:center;font-weight:800}.mock-page-brand strong{font-size:14px}.mock-page-brand small{display:block;color:var(--muted);font-size:10px}.mock-page h3{font-size:25px;margin-bottom:8px}.mock-page>p{font-size:13px;color:var(--muted)}.poll-options{display:grid;gap:8px;margin:20px 0}.poll-options label{display:flex;align-items:center;gap:10px;min-height:48px;border:1px solid var(--line);padding:10px 13px;font-size:13px}.poll-options input{accent-color:var(--olive)}
.permission-sheet{border-top:1px solid var(--line);background:#f7f5ed;padding:24px 28px}.permission-sheet h3{font-size:20px;margin:0 0 7px}.permission-sheet>p{font-size:12px;color:var(--muted);margin-bottom:16px}.permission-list{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:18px}.permission-list-single{grid-template-columns:1fr}.permission-item{border:1px solid #d3d5cc;background:#fff;padding:12px;font-size:12px}.permission-item strong{display:block;font-size:13px;margin-bottom:3px}.permission-item span{color:var(--muted)}.permission-choice-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}.permission-choice-row button{min-height:48px;border:1px solid var(--ink);background:#fff;padding:10px 14px;font:inherit;font-size:13px;font-weight:700;color:var(--ink)}.permission-choice-row button:hover{background:var(--yellow)}
.mock-account{display:flex;align-items:center;gap:12px;border:1px solid var(--line);background:#f7f5ed;padding:13px;margin:18px 0}.mock-account-avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:#d6d9cd;font-weight:800}.mock-account strong{display:block;font-size:13px}.mock-account span{font-size:10px;color:var(--muted)}.mock-mode-note{font-size:11px!important;border-left:3px solid var(--olive);padding-left:10px;color:#53614d!important}
.study-form{padding:26px 32px 32px}.study-form-section{border:0;padding:0;margin:0 0 31px}.study-form-section legend{font-size:20px;font-weight:750;padding:0;margin-bottom:5px}.study-form-help{font-size:12px;color:var(--muted);margin:0 0 15px}.likert-list{display:grid;gap:12px}.likert-item{border-top:1px solid var(--line);padding-top:13px}.likert-item>p{font-size:14px;margin:0 0 10px}.likert-order{display:block;margin-bottom:3px;color:var(--muted);font-size:10px;font-weight:700;letter-spacing:.05em}.likert-scale{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}.likert-scale label{min-height:48px;border:1px solid var(--line);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:11px;text-align:center;padding:5px}.likert-scale label:hover{background:#f2ecd7}.likert-scale input{margin:0;accent-color:var(--olive)}.likert-ends{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);margin-top:5px}
.study-choice-list{display:grid;grid-template-columns:1fr 1fr;gap:8px}.study-choice-list label{display:grid;grid-template-columns:20px 1fr;gap:8px;align-items:start;min-height:48px;border:1px solid var(--line);padding:11px 12px;font-size:12px}.study-choice-list input{margin-top:2px;accent-color:var(--olive)}.study-select-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.study-field label,.study-field>span{display:block;font-size:12px;font-weight:700;margin-bottom:7px}.study-field select,.study-field textarea{width:100%;min-height:48px;border:1px solid var(--ink);background:#fff;padding:10px 12px;font:inherit;font-size:13px;color:var(--ink)}.study-field textarea{min-height:100px;resize:vertical}.study-field-full{grid-column:1/-1}.study-submit-row{display:flex;align-items:center;justify-content:space-between;gap:18px;border-top:1px solid var(--line);padding-top:20px}.study-submit-row p{font-size:11px;color:var(--muted);margin:0;max-width:42em}
.debrief-panel{padding:32px}.debrief-hero{background:#e9edde;padding:24px;border-left:5px solid var(--olive);margin-bottom:24px}.debrief-hero h2{font-size:30px;margin:0 0 10px}.debrief-hero p{margin:0;font-size:14px;line-height:1.85}.debrief-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.debrief-grid article{border-top:2px solid var(--ink);padding-top:16px}.debrief-grid h3{font-size:18px;margin-bottom:10px}.debrief-grid p,.debrief-grid li{font-size:13px;line-height:1.8;color:var(--muted)}.debrief-grid ul{padding-left:20px}.debrief-condition{display:inline-block;border:1px solid var(--olive);color:var(--olive);padding:4px 9px;font-size:11px;font-weight:750;margin-bottom:10px}.debrief-consent{margin-top:26px;border:1px solid var(--ink);padding:22px}.debrief-consent h3{font-size:19px;margin-bottom:8px}.debrief-consent>p{font-size:13px;color:var(--muted)}.debrief-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}.debrief-actions .study-button{width:100%}.completion-card{text-align:center;padding:44px 28px}.completion-mark{width:72px;height:72px;border:2px solid var(--olive);border-radius:50%;display:grid;place-items:center;color:var(--olive);font-size:35px;margin:0 auto 20px}.completion-card h2{font-size:31px;margin-bottom:12px}.completion-card>p{max-width:600px;margin:0 auto 10px;color:var(--muted);font-size:14px}.completion-reward{display:inline-block;background:var(--yellow);padding:8px 14px;color:var(--ink)!important;font-weight:750;margin:12px auto 18px!important}.interview-box{max-width:610px;margin:22px auto 0;border-top:1px solid var(--line);padding-top:18px;text-align:left}.interview-box h3{font-size:16px;margin-bottom:7px}.interview-box p{font-size:12px;color:var(--muted)}
.review-record{margin-top:24px;border-top:1px dashed var(--line);padding-top:16px;text-align:left}.review-record summary{cursor:pointer;font-size:12px;font-weight:750;min-height:44px;display:flex;align-items:center}.review-record dl{display:grid;grid-template-columns:170px 1fr;gap:7px 14px;font-size:11px}.review-record dt{color:var(--muted)}.review-record dd{margin:0;overflow-wrap:anywhere}.study-dialog{width:min(520px,calc(100% - 32px));border:1px solid var(--ink);padding:26px;background:var(--white);color:var(--ink);box-shadow:8px 8px 0 #292e2740}.study-dialog::backdrop{background:#242820a8}.study-dialog h2{font-size:26px}.study-dialog p:not(.study-card-kicker){font-size:13px;color:var(--muted);line-height:1.8}.study-noscript{border:1px solid var(--clay);padding:16px}.study-noscript a{text-decoration:underline}
@media(max-width:840px){.study-intro{grid-template-columns:1fr}.study-intro-copy{padding-top:0}.study-consent-card{max-width:680px}.study-stage-card{min-height:0}.chat-window,.mock-browser{margin:22px}.debrief-grid{grid-template-columns:1fr}.study-form{padding:22px}.study-select-grid{grid-template-columns:1fr}.study-field-full{grid-column:auto}}
@media(max-width:600px){.study-shell{padding-top:28px;padding-bottom:42px}.study-intro{gap:28px}.study-intro-copy h1{font-size:46px}.study-lead{font-size:14px}.study-consent-card{padding:22px;box-shadow:5px 5px 0 #dfe1d5}.study-entry-actions{display:grid}.study-condition-grid{grid-template-columns:1fr}.study-run-header{align-items:start}.study-sim-label{max-width:250px}.study-progress{margin-bottom:18px}.study-stage-heading{padding:21px 20px 17px}.study-stage-heading h2{font-size:25px}.chat-window,.mock-browser{margin:14px 0;border-inline:0;box-shadow:none}.chat-window{min-height:570px;margin-bottom:0}.chat-body{padding-inline:12px}.chat-message{grid-template-columns:34px minmax(0,1fr);gap:7px}.chat-avatar{width:34px;height:34px}.chat-bubble{font-size:13px;padding:9px 10px}.chat-alternative-actions{margin:0 0 14px;padding:9px 12px;border-inline:0}.chat-alternative-actions>span{width:100%}.study-action-grid,.permission-choice-row{grid-template-columns:1fr}.study-action{min-height:52px}.mock-page,.permission-sheet{padding:21px 18px}.permission-list{grid-template-columns:1fr}.study-form{padding:20px 17px}.likert-item>p{font-size:13px}.likert-scale{gap:3px}.likert-scale label{font-size:10px;padding:4px 2px}.study-choice-list{grid-template-columns:1fr}.study-submit-row{align-items:stretch;flex-direction:column}.debrief-panel{padding:20px 17px}.debrief-hero{padding:19px}.debrief-hero h2{font-size:26px}.debrief-actions{grid-template-columns:1fr}.completion-card{padding:34px 18px}.review-record dl{grid-template-columns:1fr;gap:2px}.review-record dd{margin-bottom:8px}}
@media(max-width:350px){.study-intro-copy h1{font-size:40px}.study-consent-card{padding:18px}.study-stage-heading h2{font-size:22px}.chat-bubble{font-size:12px}.likert-scale label{font-size:9px}.study-exit{font-size:11px}}
@media(prefers-reduced-motion:reduce){.study-progress span{transition:none}}