:root{font-family:Roboto,Arial,"Segoe UI",sans-serif;color:#202124;background:#fff;--blue:#1a73e8;--line:#dadce0;--muted:#5f6368;--pale:#f8f9fa}
*{box-sizing:border-box}body{margin:0;font-size:14px;line-height:1.5}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:default}button,a,input,select{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #8ab4f8;outline-offset:3px}a{color:var(--blue)}[hidden]{display:none!important}h1,h2,p{margin-top:0}h1,h2{font-weight:500;line-height:1.35}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:-100px;left:20px;padding:10px;background:var(--blue);color:#fff;z-index:50}.skip-link:focus{top:10px}
.app-header{max-width:1180px;padding:5px 24px;margin:auto;display:flex;justify-content:flex-end;align-items:center;min-height:44px}.icon-button{border:0;background:transparent;border-radius:50%;width:34px;height:34px;display:inline-grid;place-items:center;font-size:22px;line-height:1;color:var(--muted);padding:0}.icon-button:hover{background:#f1f3f4}.icon-button:disabled{opacity:.35}.menu-anchor{position:relative}.app-menu{position:absolute;z-index:10;right:0;top:39px;width:176px;background:white;padding:6px 0;border:1px solid #e8eaed;border-radius:8px;box-shadow:0 4px 14px #20212426}.app-menu button{display:block;width:100%;background:transparent;border:0;text-align:left;padding:11px 18px;color:#3c4043;font-size:13px}.app-menu button:hover{background:#f1f3f4}main{outline:none}.experiment{max-width:1180px;margin:auto;padding:0 24px 28px}.progress-track{height:2px;background:#e8f0fe;border-radius:2px;overflow:hidden;margin-bottom:24px}.progress-fill{height:100%;background:var(--blue);transition:width .2s}.trial-heading{margin-bottom:17px}.trial-context{font-size:14px;line-height:1.5;color:var(--muted);margin:0 0 8px}.trial-heading h1{font-size:22px;margin:0;letter-spacing:-.25px}.pair-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px}.post-card{min-width:0;display:flex;flex-direction:column}.post-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px;padding:0 2px;height:28px}.letter{font-size:13px;line-height:26px;font-weight:500;color:#3c4043;width:26px;height:26px;text-align:center;border-radius:50%;background:#f1f3f4}.zoom-trigger{border:0;background:transparent;width:28px;height:28px;display:grid;place-items:center;border-radius:50%;color:#80868b;padding:5px}.zoom-trigger:hover{background:#f1f3f4;color:var(--blue)}.zoom-trigger svg{width:17px;height:17px}.image-zone{position:relative;flex:1;display:flex;align-items:flex-start}.post-image{display:block;width:100%;height:auto;border-radius:9px;cursor:zoom-in}.selected .post-image{outline:2px solid var(--blue);outline-offset:-2px}.post-image.loading{opacity:0}.image-zone:has(.loading):before{content:"Φόρτωση…";position:absolute;top:35px;left:20px;font-size:12px;color:var(--muted)}.image-error{padding:20px;color:#a50e0e;font-size:12px}.selected.answer-correct .post-image{outline-color:#137333}.selected.answer-incorrect .post-image{outline-color:#c5221f}.post-reveal{padding-top:8px;color:#3c4043}.post-reveal strong{display:block;background:#f1f3f4;padding:8px 12px;border-radius:7px;font-size:22px;line-height:1.3;font-weight:600;text-align:center}.post-reveal.ai strong{background:#e8f0fe;color:#174ea6}
#answer-form{max-width:680px;margin:0 auto}.answer-form{display:grid;grid-template-columns:1fr;gap:12px;margin-top:16px;align-items:start}fieldset{border:0;margin:0;padding:0;min-width:0}legend{padding:0;font-size:13px;color:#3c4043;margin-bottom:6px;font-weight:500}.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px}.choice-label{display:flex;align-items:center;justify-content:center;gap:9px;border:1px solid var(--line);border-radius:8px;min-height:42px;padding:9px 12px;font-size:13px;cursor:pointer;color:#3c4043}.choice-label:hover{background:var(--pale)}.choice-label:has(input:checked){background:#e8f0fe;border-color:var(--blue);color:#174ea6}.choice-label input{accent-color:var(--blue);width:16px;height:16px;margin:0}.confidence-scale{display:grid;grid-template-columns:repeat(11,minmax(0,1fr));gap:5px}.confidence-option{position:relative;cursor:pointer}.confidence-option input{position:absolute;width:1px;height:1px;opacity:0}.confidence-option span{display:grid;place-items:center;height:42px;border:1px solid var(--line);border-radius:7px;color:#3c4043;font-size:13px;background:#fff}.confidence-option:hover span{background:var(--pale);border-color:#aeb4b9}.confidence-option input:checked+span{background:var(--blue);border-color:var(--blue);color:#fff}.confidence-option input:focus-visible+span{outline:3px solid #8ab4f8;outline-offset:2px}.scale-labels{display:flex;justify-content:space-between;margin-top:5px;color:#80868b;font-size:10px}.submit-row{display:flex;justify-content:flex-end;align-items:center;margin-top:10px;gap:20px}.button{display:inline-flex;justify-content:center;align-items:center;min-height:40px;border-radius:22px;padding:10px 23px;border:1px solid transparent;font-size:13px;font-weight:500;line-height:1.4;gap:10px}.primary{background:var(--blue);color:#fff}.primary:hover:not(:disabled){background:#1765cc;box-shadow:0 1px 3px #3c404333}.primary:disabled{background:#f1f3f4;color:#9aa0a6}.secondary{background:#fff;border-color:var(--line);color:var(--blue)}.secondary:hover{background:#f8faff}.text-button{background:transparent;border-color:transparent;color:var(--blue)}.text-button:hover{background:#f1f6fe}.feedback-row{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-top:14px}.feedback-panel{display:flex;flex:1;align-items:center;gap:12px;outline:none;padding:10px 14px;border-radius:8px;background:#e6f4ea;color:#137333}.feedback-symbol{width:36px;height:36px;display:grid;place-items:center;flex-shrink:0;font-size:30px;font-weight:600;line-height:1}.feedback-panel.incorrect{background:#fce8e6;color:#b31412}.feedback-panel strong{display:block;font-size:23px;line-height:1.3;font-weight:600}.feedback-panel small{display:block;color:#3c4043;font-size:12px;margin-top:3px}
.end-screen{max-width:690px;margin:40px auto;padding:0 24px 40px}.end-screen h1{font-size:26px;margin-bottom:7px}.end-description{font-size:14px;color:var(--muted)}.result-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin:28px 0}.result-stat{border:1px solid #e8eaed;border-radius:10px;padding:16px}.result-stat strong{font-size:25px;font-weight:500;display:block}.result-stat span{font-size:11px;color:var(--muted)}.download-actions{display:flex;gap:10px;flex-wrap:wrap}.end-note{font-size:11px;line-height:1.7;color:var(--muted);margin:20px 0}.end-bottom{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-top:24px}.empty-screen{max-width:690px;margin:50px auto;padding:0 24px}.empty-screen h1{font-size:24px;margin-bottom:22px}.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:#323232;color:#fff;padding:12px 20px;border-radius:5px;font-size:12px;z-index:50;max-width:90vw;box-shadow:0 2px 8px #20212425}
dialog{padding:28px;border:1px solid #e8eaed;border-radius:16px;background:#fff;color:#202124;width:440px;max-width:calc(100vw - 32px);max-height:90dvh;box-shadow:0 12px 50px #20212433}dialog::backdrop{background:#20212466}dialog h2{font-size:21px;margin:0 25px 18px 0}dialog p{font-size:13px;line-height:1.75}.dialog-note{font-size:12px;color:var(--muted);margin:18px 0 0}.close-dialog{position:absolute;right:10px;top:10px}.dialog-actions{display:flex;justify-content:flex-end;gap:7px;margin-top:24px}.select-label{display:block;font-size:12px;color:var(--muted);margin-bottom:7px}select{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:6px;color:#202124;background:white}.zoom-dialog{width:1100px;max-width:calc(100vw - 24px);height:85dvh;padding:0;overflow:hidden;background:var(--pale)}.zoom-toolbar{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;background:white;border-bottom:1px solid #e8eaed;height:58px}.zoom-toolbar h2{font-size:14px;margin:0}.zoom-toolbar>div{display:flex;align-items:center;gap:9px}#zoom-level{font-size:11px;min-width:35px;text-align:center;color:var(--muted)}.zoom-viewport{height:calc(100% - 58px);overflow:auto;padding:20px}#zoom-image{display:block;width:100%;max-width:none;height:auto;margin:0 auto}
@media(max-width:760px){.app-header{padding:5px 16px;min-height:42px}.experiment{padding:0 16px 24px}.progress-track{margin-bottom:20px}.trial-heading h1{font-size:20px}.trial-heading{margin-bottom:14px}.pair-grid{gap:10px}.post-header{margin-bottom:4px}.post-image{border-radius:6px}.answer-form{gap:12px;margin-top:14px}.choice-label{min-height:42px}.confidence-scale{gap:4px}.confidence-option span{height:42px}.submit-row{margin-top:10px}.feedback-row{gap:10px;flex-wrap:wrap}.feedback-panel{gap:6px;padding:10px;min-width:min(100%,260px)}.feedback-symbol{width:28px;height:32px;font-size:28px}.feedback-panel strong{font-size:21px}.feedback-panel small{font-size:11px}.feedback-row .button{white-space:nowrap;padding:10px 20px}.post-reveal{padding-top:6px}.post-reveal strong{font-size:clamp(15px,3.8vw,22px);padding:8px 6px}.end-screen{margin-top:28px}.result-grid{gap:8px}.result-stat{padding:13px 10px}.result-stat strong{font-size:22px}.result-stat span{font-size:10px}.end-bottom{align-items:flex-start;flex-direction:column}.zoom-toolbar{padding:8px 10px}.zoom-toolbar>div{gap:4px}.zoom-viewport{padding:12px}dialog{padding:26px 22px}.icon-button{width:32px;height:32px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important}}
/* Reading options: both conditions share the same typography and header. */
.view-toolbar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px 16px;margin-bottom:14px}.layout-options{display:inline-flex;border:1px solid var(--line);border-radius:24px;padding:2px;max-width:100%}.layout-options button{border:0;border-radius:22px;background:transparent;color:#3c4043;padding:9px 16px;min-height:44px;font-size:14px}.layout-options button[aria-pressed=true]{background:#e8f0fe;color:#174ea6}.zoom-hint{font-size:13px;color:var(--muted);margin:0}.post-header{height:auto;min-height:44px;margin-bottom:8px}.letter{width:32px;height:32px;line-height:32px;font-size:16px}.zoom-trigger{display:inline-flex;gap:8px;align-items:center;justify-content:center;width:auto;min-height:44px;padding:8px 12px;border:1px solid #c3d7f7;border-radius:23px;background:#fff;color:#174ea6;font-size:15px;font-weight:500}.zoom-trigger svg{width:24px;height:24px;flex-shrink:0}.zoom-trigger:hover{background:#e8f0fe}.experiment[data-layout=stacked] .pair-grid{grid-template-columns:minmax(0,1fr);gap:22px;max-width:920px;margin:0 auto}.reading-post{width:100%;padding:20px;border:1px solid #dce1e6;border-radius:9px;background:#fff}.reading-header{overflow:hidden;width:100%;margin-bottom:14px}.reading-header-image{display:block;width:100%;height:auto}.reading-header-image.loading{opacity:0}.reading-body{font:400 22px/1.5 Arial,Helvetica,sans-serif;color:#1c1e21;margin:0;overflow-wrap:anywhere}.selected .reading-post{outline:2px solid var(--blue);outline-offset:-2px}.selected.answer-correct .reading-post{outline-color:#137333}.selected.answer-incorrect .reading-post{outline-color:#c5221f}legend{font-size:16px}.choice-label{font-size:16px;min-height:44px}.confidence-option span{font-size:16px;height:44px}.scale-labels{font-size:12px}.button{min-height:44px}.zoom-dialog{width:960px;height:90dvh;max-height:94dvh;padding:0}.zoom-dialog[open]{display:flex;flex-direction:column}.zoom-toolbar{height:auto;min-height:70px;flex-shrink:0;gap:10px;padding:10px 16px;flex-wrap:wrap}.zoom-toolbar h2{font-size:18px;margin:0}.zoom-toolbar .reader-controls{display:flex;gap:10px;align-items:center}.reader-size{width:48px;height:48px;background:#fff;border:1px solid var(--line);border-radius:24px;color:#174ea6;font-size:20px;font-weight:500}.reader-size:hover:not(:disabled){background:#e8f0fe}.reader-size:disabled{color:#9aa0a6;background:#f1f3f4}.reader-close{font-size:15px}.zoom-viewport{height:auto;min-height:0;flex:1;overflow:auto;padding:16px}#zoom-content{max-width:850px;margin:auto}#zoom-level{font-size:14px;min-width:42px;text-align:center}
@media(max-width:600px){.view-toolbar{align-items:flex-start;gap:6px}.layout-options button{font-size:13px;padding:8px 14px}.zoom-hint{font-size:12px}.reading-post{padding:14px}.reading-header{margin-bottom:12px}.experiment[data-layout=stacked] .pair-grid{gap:18px}.zoom-trigger{padding:8px 10px;font-size:13px;gap:5px}.zoom-trigger svg{width:22px;height:22px}.zoom-toolbar{display:grid;grid-template-columns:1fr auto;padding:10px 12px}.zoom-toolbar .reader-controls{grid-column:1/-1;grid-row:2;justify-content:center}.reader-close{grid-column:2;grid-row:1}.zoom-viewport{padding:10px}.post-reveal strong{font-size:18px}.feedback-row .button{font-size:15px}}
@media(max-width:440px){.confidence-scale{grid-template-columns:repeat(6,minmax(0,1fr));gap:6px}.confidence-option span{height:46px}.choice-grid{gap:8px}}
.feedback-identity{display:block;font-size:16px;line-height:1.4;font-weight:500;margin-top:3px}
.inline-link{padding:0;border:0;background:transparent;color:#1a73e8;text-decoration:underline;cursor:pointer;font:inherit}.collection-note{font-size:12px;line-height:1.6;color:#5f6368;margin:12px 0 0}.profile-dialog{width:570px;padding:26px;max-height:94dvh}.profile-dialog h2{font-size:23px}.profile-dialog p{font-size:14px;line-height:1.6;margin-bottom:12px}.profile-fields{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:18px}.profile-fields label{font-size:14px;display:grid;gap:6px;align-content:start}.profile-fields label:last-child{grid-column:1/-1}.profile-fields input{padding:11px 12px;border:1px solid #dadce0;border-radius:6px;width:100%;min-width:0;font:inherit}.profile-fields select{font-size:14px;min-height:44px}.profile-fields span{font-size:11px;color:#5f6368}.consent-label{display:flex;align-items:flex-start;gap:10px;font-size:13px;line-height:1.6;margin-top:18px}.consent-label input{width:19px;height:19px;flex-shrink:0;margin:3px 0 0;accent-color:#1a73e8}.profile-contact{font-size:12px!important;color:#5f6368;margin-top:14px}.profile-privacy{color:#5f6368}.form-error{font-size:13px;color:#b31412;background:#fce8e6;border-radius:7px;padding:10px;margin:12px 0 0}.sync-status{position:fixed;bottom:0;left:0;right:0;z-index:30;background:#fff8e1;color:#6b5200;border-top:1px solid #f7e2a0;text-align:center;padding:9px 16px;font-size:12px}.test-notice{font-size:12px;background:#fff8e1;padding:8px 12px;border-radius:7px;margin:0 0 12px;color:#6b5200}.comparison-result{margin:14px 0;padding:15px;background:#e8f0fe;border-radius:9px;font-size:15px;line-height:1.7}.comparison-result p:last-child{margin-bottom:0}.end-screen .download-actions{margin-top:20px}.session-code{font-size:12px;word-break:break-all}.end-screen{max-width:760px}.app-menu{width:220px}@media(max-width:600px){.profile-dialog{padding:24px 18px}.profile-fields{grid-template-columns:1fr;gap:12px}.profile-dialog h2{font-size:21px}.profile-dialog .dialog-actions{flex-wrap:wrap;gap:8px}.profile-dialog .dialog-actions button{flex:1;white-space:nowrap}.profile-dialog .consent-label{font-size:13px}.collection-note{font-size:12px}}
.profile-dialog .dialog-actions{position:sticky;bottom:-26px;background:#fff;padding-top:12px;padding-bottom:3px;border-top:1px solid #e8eaed;z-index:2}@media(max-width:600px){.profile-dialog .dialog-actions{bottom:-24px}}
.sync-status{position:static;flex:1;max-width:850px;margin:0 auto 0 0;padding:4px 8px;border:0;border-radius:5px;font-size:12px;line-height:1.4;text-align:left;z-index:auto}.app-header{gap:10px}