:root{--ink:#243b3c;--muted:#76817e;--accent:#2f6257;--paper:#f7f7f1;--line:#dce1d9;--serif:"Noto Serif SC","Source Han Serif SC",SimSun,serif;color-scheme:light}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:14px/1.65 "Segoe UI","Microsoft YaHei",sans-serif}button,input,select,textarea{font:inherit}button,a,input,select,textarea{touch-action:manipulation}button,a.button{cursor:pointer;background:#fff;border:1px solid #cfd9d1;color:var(--ink);border-radius:6px;padding:11px 17px;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:16px;font-weight:500}button:hover,a.button:hover{background:#edf2eb}button.primary,a.primary{background:var(--accent);border-color:var(--accent);color:#fff}button.primary:hover,a.primary:hover{background:#234d43}button:disabled{opacity:.45;cursor:default}button.text-button{padding:3px 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10px}textarea{width:100%;resize:vertical;min-height:110px;border:1px solid #d4ddd0;border-radius:5px;padding:12px 15px;background:#fffefb;line-height:1.85;color:var(--ink)}textarea::placeholder{color:#a6ada0}.textarea-foot{display:flex;justify-content:space-between;gap:14px;font-size:10px;color:#97a08f;margin-top:5px}.question-actions,.review-actions{display:flex;justify-content:space-between;gap:16px;margin-top:28px;padding-top:22px;border-top:1px solid var(--line)}.study-footer{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:23px;font-size:10px;color:#98a08e}.error-box{background:#fff0e7;border:1px solid #edd1bd;padding:12px 16px;border-radius:4px;margin-top:20px}.error-box p{margin:3px 0}.review-head{padding:40px 0 21px}.review-head h1{font:500 32px/1.5 var(--serif);margin-bottom:15px}.summary-grid{display:grid;grid-template-columns:1fr 1fr;gap:19px}.answer-summary{border:1px solid var(--line);background:#fffefb;padding:21px 23px;min-width:0;border-radius:6px}.summary-top{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:17px}.summary-top h2{font-size:15px;font-weight:500;margin:0}.answer-summary dl{margin:0;font-size:12px}.answer-summary dl>div{display:grid;grid-template-columns:70px minmax(0,1fr);gap:12px;margin:9px 0}.answer-summary dt{color:#96a08d;font-size:11px}.answer-summary dd{margin:0;overflow-wrap:anywhere}.summary-reasons{font-size:11px;color:#83917a;padding-top:10px;border-top:1px solid var(--line);margin-top:15px;line-height:1.85;overflow-wrap:anywhere}.summary-reasons p{margin-bottom:6px;white-space:pre-wrap}.incomplete{border-color:#ddb99b}.missing{color:#aa6943;font-size:11px;margin:10px 0 0}.locked{font-size:10px;color:#9aa490}.result-actions{display:flex;gap:11px;flex-wrap:wrap;margin-top:23px}.result-actions>*{font-size:12px}.blind-receipt{padding:17px 20px;background:#eaf0e4;border:1px solid #d9e2d0;color:#6b805f;font-size:12px;margin-bottom:22px;border-radius:5px}.result-metrics{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:0 0 27px}.result-metrics>div{border:1px solid #d6e0cd;border-radius:6px;padding:23px;background:#eaf0e4;display:flex;flex-direction:column;gap:8px}.result-metrics strong{font:28px/1.5 Georgia,serif;color:#456d3e}.result-metrics em{font-size:13px;font-weight:400;color:#91a483;margin:0 6px}.result-metrics span{font-size:12px;color:#6d865f}.result-metrics small{font-size:10px;line-height:1.8;color:#93a288}.reveal-line dd{color:#557c4b;font-size:11px;line-height:1.9}.receipt{font-size:10px;color:#a1a997;line-height:1.9;margin:26px 0 0;overflow-wrap:anywhere}#network-notice{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);z-index:20;max-width:min(700px,calc(100% - 28px));padding:13px 20px;background:#e5edde;border:1px solid #baccac;border-radius:6px;color:#526b46;box-shadow:0 5px 25px #203b3020;font-size:12px}#network-notice.bad{background:#fff1e6;border-color:#daba9e;color:#9b5b34}.loading{padding:50px 0;color:var(--muted)}[hidden]{display:none!important}
@media(max-width:760px){.site-header{width:calc(100% - 32px);padding:21px 0}.brand span{display:none}.header-note{font-size:10px}main{width:calc(100% - 32px)}.intro{margin-top:33px}.intro h1{font-size:35px}.lead{font-size:13px}.intro-facts{font-size:10px;gap:9px;margin-bottom:23px}.intro-facts span{padding-right:9px;margin-right:0}.exposure-choices{grid-template-columns:1fr}.choice{font-size:12px;padding:11px 12px}.background-label select{margin-left:0;min-width:100%;flex-basis:100%}.privacy{font-size:10px}.study-top{padding-top:24px}.study-top h1{font-size:26px}.progress-info{font-size:10px}.question-nav{gap:5px;padding:9px 0 12px}.question-nav button{padding:8px 7px;font-size:12px;display:flex;flex-direction:column;gap:2px}.question-nav button span{font-size:9px}.original-panel{margin-top:18px;padding:18px 19px}.panel-heading{gap:10px;flex-wrap:wrap}.panel-heading h2{font-size:12px}.overline{font-size:8px}.original-copy{font-size:17px;line-height:1.8}.translation-pair{grid-template-columns:1fr;gap:13px}.translation-panel{padding:19px 21px 22px}.translation-copy{font-size:17px;line-height:1.95}.reading-note{text-align:left;font-size:10px;margin-bottom:27px}legend{font-size:13px;gap:8px}.question-number{font-size:10px;padding-right:8px}.choices:not(.compact){display:grid;grid-template-columns:1fr;width:100%}.preference-choices:not(.compact){grid-template-columns:1fr 1fr}.confidence{gap:10px}.compact{gap:11px}.compact .choice{font-size:10px}.reason-heading{gap:5px}.reason-heading .muted{font-size:10px}.reason-block{padding:17px 15px 19px}.reason-options{grid-template-columns:1fr 1fr;gap:12px 12px}.reason{font-size:11px}.target-label{font-size:10px}.comment-label{align-items:baseline;flex-wrap:wrap;gap:5px}.comment-label .muted{font-size:10px}.textarea-foot{font-size:9px}.question-actions button{font-size:12px;padding:11px 14px}.study-footer{font-size:9px;align-items:flex-start}.study-footer button{font-size:10px}.review-head{padding-top:29px}.review-head h1{font-size:27px}.summary-grid,.result-metrics{grid-template-columns:1fr}.result-metrics{gap:12px}.answer-summary{padding:19px 20px}.result-actions{gap:9px}.result-actions>*{font-size:11px;padding:10px 12px}.result-metrics strong{font-size:26px}.review-actions button{font-size:12px}.required{font-size:8px;margin-left:0}.summary-reasons{font-size:11px}}
.brand{color:var(--ink)}
.preference-totals{display:flex;gap:20px;flex-wrap:wrap}.reveal-metrics.result-metrics .preference-totals>span{font:20px/1.8 "Segoe UI",sans-serif;color:var(--ink)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.reveal-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;padding-bottom:26px}.reveal-head .eyebrow{flex-basis:100%;margin-bottom:0}.reveal-head h1{font-size:28px;margin:0}.reveal-head .result-actions{margin:0}.reveal-metrics.result-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:30px}.reveal-metrics.result-metrics>div{border:0;border-radius:0;background:none;padding:20px;gap:8px}.reveal-metrics.result-metrics>div+div{border-left:1px solid var(--line)}.reveal-metrics.result-metrics strong{font:26px/1.4 "Segoe UI",sans-serif;color:var(--ink)}.reveal-metrics.result-metrics small{font:12px/1.6 "Segoe UI",sans-serif;color:var(--muted)}.reveal-metrics.result-metrics p{font-size:11px;color:var(--muted);margin:0}.result-overview h2,.revealed-reading-section>h2{font-size:18px;margin:0 0 18px}.reveal-table{border-collapse:collapse;width:100%;font-size:12px;line-height:1.8;text-align:left}.reveal-table th,.reveal-table td{padding:13px 12px;border-bottom:1px solid var(--line);vertical-align:middle}.reveal-table thead th{font-size:11px;color:var(--muted);font-weight:500;background:#ecefe9}.reveal-table .text-button{font-size:12px;padding:6px 0;white-space:nowrap}.reveal-table .active-row{background:#edf1e9}.origin-tag{display:inline-block;font-size:11px;font-weight:600;white-space:nowrap;padding:3px 7px;border-radius:3px}.origin-tag.machine{background:#e3f0f4;color:#11647b}.origin-tag.human{background:#f8e9ec;color:#923c55}.verdict{font-weight:600}.verdict.correct{color:#2f6257}.verdict.incorrect{color:#a24232}.verdict.undecided{color:#6d756e}.guess-detail{display:block;color:var(--muted);font-size:10px}.revealed-reading-section{margin-top:38px;scroll-margin-top:18px}.result-nav{position:static;padding-top:0;border:0}.result-nav button{justify-content:center}.reveal-judgments{display:grid;grid-template-columns:1fr 1fr;gap:25px;border-bottom:1px solid var(--line);padding:18px 0 20px}.reveal-judgments h3{font-size:11px;font-weight:400;color:var(--muted);margin:0 0 9px}.reveal-judgments strong{font-size:15px;line-height:1.8}.reveal-judgments p{font-size:12px;color:var(--muted);line-height:1.8;margin:7px 0 0}.revealed-reading-section .panel-heading h3{font-size:14px;line-height:1.7;margin:0}.revealed-pair{align-items:start}.revealed-translation.machine{border-top:3px solid #337c94}.revealed-translation.human{border-top:3px solid #ae5972}.revealed-translation.machine .panel-heading h3{color:#11647b}.revealed-translation.human .panel-heading h3{color:#923c55}.revealed-translation .panel-heading{flex-wrap:wrap;margin-bottom:10px}.preference-mark{font-size:10px;color:#385c2d;background:#e8f0df;padding:3px 7px}.translator-credit{font-size:10px;line-height:1.8;color:var(--muted);margin:0 0 17px;overflow-wrap:anywhere}.reveal-reasons{padding:21px 0;border-bottom:1px solid var(--line);font-size:12px;line-height:1.85;overflow-wrap:anywhere}.reveal-reasons h3{font-size:13px;margin:0 0 9px}.reveal-reasons p{margin:7px 0;white-space:pre-wrap}.revealed-reading-section .question-actions{align-items:center;border:0;margin-top:0}.question-actions>span{font-size:11px;color:var(--muted)}.source-details{margin-top:30px;border-top:1px solid var(--line);padding-top:20px;font-size:13px}.source-details summary{cursor:pointer}.source-details .material-info{border:0;margin:0;padding-bottom:0}
@media(max-width:760px){.reveal-head{gap:14px}.reveal-head h1{font-size:26px}.reveal-head .result-actions{width:100%}.reveal-metrics.result-metrics{grid-template-columns:1fr;gap:0}.reveal-metrics.result-metrics>div{display:grid;grid-template-columns:minmax(0,1fr) auto;padding:15px 0;gap:7px 12px;align-items:center}.reveal-metrics.result-metrics>div+div{border-left:0;border-top:1px solid var(--line)}.reveal-metrics.result-metrics strong{font-size:23px}.reveal-metrics.result-metrics p{grid-column:1/-1}.reveal-table thead{display:none}.reveal-table,.reveal-table tbody{display:block;width:100%}.reveal-table tr{display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid var(--line);padding:12px 0;gap:9px}.reveal-table th,.reveal-table td{display:block;padding:0 10px;border:0;min-width:0}.reveal-table th{grid-column:1/-1}.reveal-table td:before{content:attr(data-label);display:block;font-size:10px;color:var(--muted);margin-bottom:4px}.reveal-table .guess-detail{font-size:10px}.result-nav{gap:5px}.result-nav button{font-size:11px;padding:9px 4px}.reveal-judgments{grid-template-columns:1fr;gap:17px}.revealed-reading-section .question-actions{gap:10px}.revealed-reading-section .question-actions button{padding:10px}.reveal-table .active-row{border-left:2px solid var(--accent)}}
.material-info{margin:24px 0;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:13px;line-height:1.85;overflow-wrap:anywhere}.material-info h2{font-size:15px;margin:0 0 10px}.material-info p{margin:8px 0}.material-info cite{font-style:normal}.material-info dl{margin:12px 0}.material-info dl>div{display:grid;grid-template-columns:76px minmax(0,1fr);gap:12px;margin:7px 0}.material-info dt{color:var(--muted)}.material-info dd{margin:0}.material-note{color:var(--muted);font-size:11px}@media(max-width:760px){.material-info{font-size:12px}.material-info dl>div{grid-template-columns:64px minmax(0,1fr);gap:8px}}

/* Participant entry: two required questions, visible single-choice options. */
#start-form{margin-top:36px;padding-top:30px;border-top:1px solid var(--line)}
.entry-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:28px}
.entry-heading h2{font:500 25px/1.5 var(--serif);margin:0;letter-spacing:.04em}
.entry-heading p{font-size:12px;color:#65766e;margin:0}
#start-form .entry-field{margin:0 0 30px}
#start-form legend{display:block;width:100%;font-size:16px;font-weight:600;line-height:1.8;margin-bottom:8px}
.entry-number{font:12px/1.5 Georgia,serif;color:#876c46;margin-right:12px}
#start-form .required{display:inline-block;vertical-align:middle;background:#e7eee6;color:#47634f;padding:3px 7px;font-size:10px;margin-left:10px;border-radius:3px}
.entry-help{font-size:12px;line-height:1.8;color:#65766e;margin:0 0 15px}
.entry-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.entry-choice{display:flex;align-items:flex-start;gap:12px;min-width:0;padding:17px 18px;border:1px solid #d5ddd3;border-radius:8px;background:#fffefb;cursor:pointer;transition:background .16s,border-color .16s}
.entry-choice:last-child{grid-column:1/-1}
.entry-choice input{flex:0 0 auto;width:17px;height:17px;margin:3px 0 0;accent-color:var(--accent)}
.entry-choice>span{min-width:0;display:grid;gap:6px}
.entry-choice strong{font-size:13px;font-weight:500;line-height:1.75;overflow-wrap:anywhere}
.entry-choice small{font-size:11px;line-height:1.85;color:#65766e}
.entry-choice:has(input:checked){border-color:var(--accent);background:#eaf1e7;box-shadow:inset 0 0 0 1px var(--accent)}
.entry-choice:focus-within{outline:2px solid #ad8645;outline-offset:3px}
@media(hover:hover){.entry-choice:hover{border-color:#819b84;background:#f1f5ec}}
.entry-field[aria-invalid="true"] .entry-options{outline:1px solid #a44636;outline-offset:5px;border-radius:7px}
.entry-other{display:block;margin-top:16px;font-size:13px;line-height:1.8}
.entry-other>span{font-size:11px;color:#65766e;margin-left:10px}
.entry-other textarea{margin-top:9px;min-height:90px;font-size:13px}
#start-form .actions{padding-top:22px;border-top:1px solid var(--line);margin-top:22px;flex-wrap:wrap}
#start-form .primary{min-width:172px;min-height:48px;letter-spacing:.05em}
#start-error:empty{display:none}
@media(max-width:760px){#start-form{margin-top:28px;padding-top:24px}.entry-heading{gap:6px;margin-bottom:23px}.entry-heading h2{font-size:23px}#start-form legend{font-size:15px}.entry-options{grid-template-columns:1fr;gap:10px}.entry-choice{padding:15px 14px}.entry-choice strong{font-size:13px}.entry-choice small{font-size:12px}.entry-choice:last-child{grid-column:auto}.entry-number{margin-right:8px}#start-form .primary{width:100%}#start-form .actions>button{min-height:48px}.entry-help{font-size:12px}}
@media(prefers-reduced-motion:reduce){.entry-choice{transition:none}}