:root{font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:#23352e;background:#f4f3ee;line-height:1.75;--green:#245844;--muted:#66756e;--line:#d5ded6;--paper:#fffefb;--gold:#b29553}*{box-sizing:border-box}body{margin:0}a{color:var(--green);text-underline-offset:4px}button,input,select,textarea{font:inherit}button,.button{border:1px solid var(--green);background:var(--green);color:white;padding:12px 22px;min-height:48px;border-radius:9px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;text-decoration:none;font-weight:600}button:hover,.button:hover{background:#193e30}button:disabled{opacity:.5;cursor:wait}.secondary{background:transparent;color:var(--green)}.secondary:hover{background:#e7ede7}.danger{color:#903c2f;border-color:#903c2f;background:transparent}.danger:hover{background:#fae8e2;color:#662b21}input:not([type=radio]):not([type=checkbox]),select{padding:12px;border:1px solid #83998b;border-radius:7px;background:white;width:100%;color:#23352e}input[type=checkbox],input[type=radio]{accent-color:var(--green);width:21px;height:21px;flex-shrink:0}label{cursor:pointer}h1,h2,h3,p{margin-top:0}h1{font-weight:650;font-size:clamp(1.9rem,4vw,3.1rem);letter-spacing:.02em;line-height:1.25;margin-bottom:22px}h2{font-size:1.4rem;line-height:1.4}h3{font-size:1.1rem}header{max-width:1240px;margin:auto;display:flex;justify-content:space-between;gap:20px;padding:23px 32px;align-items:center;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;color:#23352e;font-weight:700;font-size:1.3rem;text-decoration:none}.mark{font-size:2.4rem;line-height:1}.brand-sub{font-size:.72rem;display:block;font-weight:400;letter-spacing:.14em}nav{display:flex;gap:20px;font-size:.87rem}main{max-width:1100px;margin:44px auto 70px;padding:0 28px;min-height:60vh}.eyebrow{color:var(--green);font-size:.8rem;letter-spacing:.16em;margin-bottom:15px;font-weight:700}.muted{color:var(--muted)}.lead{font-size:1.13rem;max-width:650px}.grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(290px,.7fr);gap:48px}.card{background:var(--paper);border:1px solid var(--line);padding:28px;border-radius:16px;margin-bottom:20px}.soft{background:#e9efe8}.notice{border-left:3px solid var(--gold);background:#f8f1dd;padding:16px 20px;border-radius:4px;margin-bottom:20px}.notice p:last-child,.card p:last-child{margin-bottom:0}.actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:22px}.actions>*{flex:0 1 auto}.flow{list-style:none;padding:0;margin:35px 0 0;border-top:1px solid var(--line)}.flow li{display:flex;gap:20px;padding:15px 0;border-bottom:1px solid var(--line);align-items:baseline}.flow .number{color:var(--green);font-variant-numeric:tabular-nums;letter-spacing:.1em}.flow small{color:var(--muted);margin-left:auto}.check{display:flex;gap:12px;align-items:flex-start;padding:10px 0}.check input{margin-top:5px}.field{display:block;margin:14px 0}.field span{display:block;margin-bottom:5px}.legal{font-size:.9rem}.legal dl{margin:0}.legal dt{font-weight:650}.legal dd{margin:0 0 13px;overflow-wrap:anywhere}.narrow{max-width:780px;margin:auto}.phase{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:20px;font-size:.86rem}.pill{border:1px solid #9cae9e;padding:5px 13px;border-radius:30px;background:#e9efe8}.stats{display:flex;gap:32px;flex-wrap:wrap;margin:24px 0}.stat b{display:block;font-size:2rem;font-weight:600;line-height:1.2;font-variant-numeric:tabular-nums}.stat span{font-size:.85rem;color:var(--muted)}.huge{font-size:clamp(3rem,8vw,5.5rem);letter-spacing:.12em;line-height:1.1}.quote{font-size:1.28rem;line-height:2.2;font-weight:400}.qr{width:240px;max-width:100%;height:auto;background:white;border-radius:12px;border:1px solid var(--line)}fieldset{border:1px solid var(--line);border-radius:12px;background:var(--paper);padding:20px 24px;margin:0 0 20px}legend{font-weight:600;padding:0 8px;font-size:1.08rem}.options{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.option{display:flex;gap:9px;align-items:center;border:1px solid var(--line);padding:10px;min-height:70px;border-radius:7px;font-size:.9rem;background:#fff}.option:has(input:checked){background:#e4eee5;border-color:var(--green)}.option span{display:block}.error{color:#8d2c20;background:#fff0eb;border-left:3px solid #8d2c20;padding:14px;margin:15px 0}.score-title{display:flex;justify-content:space-between;gap:20px}.score-title strong{font-size:1.7rem;color:var(--green);white-space:nowrap}.score-title small{font-size:.85rem;font-weight:400}.calc{background:#edf1eb;padding:15px;border-radius:8px;font-variant-numeric:tabular-nums}table{width:100%;border-collapse:collapse;margin:20px 0}th,td{text-align:left;padding:12px;border-bottom:1px solid var(--line)}th{font-weight:600}td:last-child{font-variant-numeric:tabular-nums}.radar{width:100%;max-width:500px;display:block;margin:20px auto}.radar polygon.gridline,.radar line{fill:none;stroke:#b8c8bc;stroke-width:1}.radar polygon.data{fill:#37795133;stroke:#245844;stroke-width:2}.radar text{font-family:inherit;fill:#23352e;font-size:13px}details{border-top:1px solid var(--line);padding:16px 0}summary{cursor:pointer;color:var(--green);font-weight:600}.recovery{font-family:ui-monospace,monospace;overflow-wrap:anywhere;user-select:all;display:block;background:#edf1eb;padding:14px;border-radius:6px;font-size:.95rem}.progress-dots{display:flex;gap:6px;margin:12px 0 24px}.progress-dots i{height:4px;flex:1;background:#d9e1d9;border-radius:4px}.progress-dots i.active{background:var(--green)}#connection{position:sticky;top:0;z-index:5;text-align:center;font-size:.85rem;background:#eef4ed}#connection.offline{background:#fff1d4;color:#664c20;padding:10px}#environment{text-align:center;color:#69501f;background:#f4e9ca;font-size:.78rem;line-height:1.5}#toast:not(:empty){position:fixed;bottom:24px;left:50%;transform:translateX(-50%);width:min(580px,90vw);padding:17px 22px;border-radius:9px;background:#79372d;color:white;z-index:10;box-shadow:0 5px 28px #0002}footer{max-width:1240px;margin:auto;padding:24px 32px;border-top:1px solid var(--line);font-size:.8rem;color:var(--muted);display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px}.skip{position:absolute;top:-80px}.skip:focus{top:10px;left:10px;z-index:50;background:white;padding:12px}*:focus-visible{outline:3px solid #a56c1e;outline-offset:4px}.screen-view{max-width:1250px}.screen-view .quote{font-size:1.8rem}.screen-view h1{font-size:3rem}.screen-view .stats b{font-size:3rem}.link-button{font-weight:400;text-decoration:underline}ol,ul{padding-left:1.4em}.status-check{color:var(--green);font-size:3rem}.qr-layout{display:grid;grid-template-columns:1fr auto;gap:35px;align-items:center}.section-gap{margin-top:32px}.room-list button{margin:4px} .with-space{margin-top:20px}.hidden{display:none!important}
@media(max-width:760px){header{padding:15px 18px}.brand-sub{font-size:.65rem}nav{gap:10px;font-size:.75rem}.brand{font-size:1.08rem}main{margin-top:28px;padding:0 18px}.grid{grid-template-columns:1fr;gap:18px}.card{padding:21px}.options{grid-template-columns:1fr}.option{min-height:48px;padding:8px 12px}.option span{display:inline}fieldset{padding:16px}.quote{font-size:1.12rem}.stats{gap:24px}.actions>*{flex:1 1 auto}.qr-layout{grid-template-columns:1fr}.huge{font-size:2.6rem;letter-spacing:.05em}.screen-view h1{font-size:2rem}.screen-view .quote{font-size:1.2rem}.legal{font-size:.88rem}footer{padding:20px 18px}.flow small{font-size:.74rem}.score-title{gap:10px}.score-title strong{font-size:1.3rem}th,td{padding:10px 5px}}
@media print{header,footer,#connection,#environment,.actions,.no-print{display:none!important}body{background:white}.card{break-inside:avoid;box-shadow:none}main{max-width:none;margin:0}.grid{display:block}}

.confirm-dialog{max-width:min(520px,calc(100vw - 36px));border:1px solid var(--line);border-radius:16px;padding:28px;background:var(--paper);color:#23352e}.confirm-dialog::backdrop{background:#17251e80}

/* Simplified classroom flow: keep choices and teacher release easy to reach. */
.student-options{margin-top:28px;color:var(--muted,#536579)}
.student-options[open]{padding-bottom:18px}
.release-button{width:100%;min-height:58px;font-size:20px;font-weight:650}
.feedback-panel{animation:feedback-appear .18s ease-out}
.waiting{padding:48px 24px;text-align:center}
select{font:inherit;color:inherit;width:100%;min-height:48px;padding:10px;border:1px solid #9aa8b6;border-radius:8px;background:#fff}
@keyframes feedback-appear{from{opacity:.25;transform:translateY(8px)}to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){.feedback-panel{animation:none}}

/* Distinguish the research comparator even in monochrome print. */
.radar polygon.reference{fill:none;stroke:#965c21;stroke-width:2.5;stroke-dasharray:7 5}.radar-legend{display:flex;flex-wrap:wrap;gap:10px 24px;font-size:.9rem;margin:0 0 20px}.radar-legend span{display:flex;align-items:center;gap:8px}.radar-legend i{display:inline-block;width:30px;min-width:30px;border-top:3px solid #245844}.radar-legend .reference-line{border-top:3px dashed #965c21}.comparison-table th:not(:first-child),.comparison-table td{white-space:nowrap}.comparison-table th[scope=row]{font-weight:400}@media(max-width:480px){.comparison-table th,.comparison-table td{padding:10px 6px;font-size:.85rem}}