/* Formula challenge 0.2.0. Scoped to the game; existing page styles are unchanged. */
.fg-app{--fg-ink:#122c40;--fg-accent:#0c6576;--fg-line:#c8d8df;--fg-paper:#fff;--fg-muted:#4d6270;color:var(--fg-ink);max-width:1080px;margin:0 auto;padding:24px 24px 12px;font:17px/1.45 Arial,Helvetica,sans-serif;box-sizing:border-box}
.fg-app *{box-sizing:border-box}.fg-app [hidden]{display:none!important}
.fg-app h1{font-family:Georgia,serif;font-weight:700;font-size:clamp(25px,2.7vw,37px);line-height:1.13;margin:0 0 6px;letter-spacing:-.02em;color:var(--fg-ink)}
.fg-heading{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:15px}.fg-heading p{font-size:15px;margin:0;color:var(--fg-muted)}
.fg-top-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.fg-app button,.fg-app select,.fg-app input{font:inherit;text-transform:none;letter-spacing:normal}
.fg-app button{border:1px solid var(--fg-accent);border-radius:5px;padding:10px 17px;background:var(--fg-accent);color:white;cursor:pointer;font-weight:600;line-height:1.25;white-space:nowrap;min-height:42px;transition:background .1s}
.fg-app button:hover:not(:disabled){filter:brightness(.94)}.fg-app button:disabled{opacity:.5;cursor:wait}.fg-app .fg-quiet{background:transparent;color:var(--fg-accent);border-color:var(--fg-line);font-weight:500}
.fg-app :focus-visible{outline:3px solid #168aa6;outline-offset:3px}
.fg-settings{display:flex;gap:12px;flex-wrap:wrap;align-items:end;padding:14px 0 18px;border-top:1px solid var(--fg-line)}
.fg-settings label{display:grid;gap:5px;font-size:14px;flex:1 1 110px;color:var(--fg-muted)}
.fg-settings select{width:100%;min-width:0;padding:10px 8px;background:var(--fg-paper);border:1px solid #8ea8b6;border-radius:4px;color:var(--fg-ink);font-size:15px;min-height:42px}
.fg-setting-note{flex-basis:100%;font-size:13px;color:var(--fg-muted);margin:0}
.fg-scoreline{display:flex;align-items:center;gap:24px;border-block:1px solid var(--fg-line);padding:8px 0;font-size:15px;min-height:48px;font-variant-numeric:tabular-nums}.fg-scoreline strong{font-size:22px;font-weight:600;color:var(--fg-accent)}.fg-scoreline .fg-end{margin-left:auto;min-height:32px;padding:6px 11px;font-size:13px;border:none}.fg-clock{font-size:26px;font-weight:600;margin-left:auto;white-space:nowrap}.fg-clock.fg-urgent{color:#a42b22}.fg-scoreline:has(.fg-clock:not([hidden])) .fg-end{margin-left:0}
.fg-timebar{display:block;width:100%;height:4px;border:0;appearance:none;background:#dce7ec}.fg-timebar::-webkit-progress-bar{background:#dce7ec}.fg-timebar::-webkit-progress-value{background:var(--fg-accent)}.fg-timebar::-moz-progress-bar{background:var(--fg-accent)}
.fg-prompt{text-align:center;font-size:clamp(19px,2.2vw,25px);margin:18px 0 4px;font-weight:500}
.fg-stage{overflow:hidden;height:clamp(210px,32vh,330px);width:min(100%,740px);margin:0 auto 8px;position:relative;background:var(--fg-paper)}
.fg-drawing{width:100%;height:100%;padding:18px 38px;display:flex;align-items:center;justify-content:center;line-height:0}.fg-drawing svg{display:block;width:100%;height:100%;max-width:100%;max-height:100%;overflow:hidden;pointer-events:none}
.fg-loading{position:absolute;inset:0;display:grid;place-items:center;margin:0;font-size:16px;color:var(--fg-muted);padding:20px;background:var(--fg-paper)}
.fg-answer-form{display:flex;justify-content:center;gap:10px;width:min(100%,520px);margin:0 auto;align-items:stretch}
.fg-answer-form input{background:var(--fg-paper);border:2px solid #7796a5;border-radius:5px;padding:11px 15px;width:100%;min-width:0;font-size:30px;line-height:1.2;text-align:center;color:var(--fg-ink);height:60px;box-shadow:none}
.fg-answer-form input::placeholder{font-size:22px;color:#71818a}.fg-answer-form button{font-size:21px;min-width:120px}.fg-entry-help{text-align:center;font-size:12px;margin:5px 0 0;color:var(--fg-muted)}
.fg-feedback{min-height:64px;text-align:center;padding:10px 0 4px;font-size:16px;line-height:1.35}.fg-feedback p{margin:0 0 3px}.fg-feedback .fg-result-formula{display:inline-block;font-size:28px;color:var(--fg-ink);font-weight:600;margin:0 9px}.fg-feedback sub{font-size:.65em}.fg-feedback .fg-result-name{display:inline-block;font-size:15px;color:var(--fg-muted);margin:0 9px}.fg-feedback.is-correct{color:#1b6847}.fg-feedback.is-wrong{color:#a62b24}.fg-feedback.is-notation{color:#835320}.fg-feedback.is-invalid{color:#a62b24}.fg-milestone{font-size:14px;color:var(--fg-accent)}
.fg-explanation{max-width:640px;margin:0 auto 10px;font-size:15px;border-top:1px solid var(--fg-line);padding-top:8px}.fg-explanation summary{cursor:pointer;color:var(--fg-accent);text-align:center}.fg-explanation p{margin:8px 0}.fg-explanation-body{padding:5px 0}
.fg-admin-control{display:flex;gap:10px;align-items:center;justify-content:center;flex-wrap:wrap;font-size:12px;padding:8px 0}.fg-admin-control button{font-size:12px;min-height:32px;padding:7px 10px;color:#923126!important}.fg-admin-control select{font-size:12px;max-width:155px;padding:5px;background:white;border:1px solid var(--fg-line);border-radius:3px;color:var(--fg-muted)}.fg-admin-control a{font-size:12px;color:var(--fg-muted)}
.fg-summary{text-align:center;min-height:320px;padding:35px 12px}.fg-summary h2{font:600 29px Georgia,serif;margin:5px 0}.fg-summary p{margin:12px 0}.fg-summary .fg-summary-score{font-size:clamp(40px,6vw,70px);font-weight:600;color:var(--fg-accent);line-height:1.1}.fg-summary button{margin:8px 5px}.fg-bottom{display:flex;min-height:32px;align-items:center;gap:8px;flex-wrap:wrap;justify-content:center;font-size:12px;color:var(--fg-muted)}.fg-bottom button{font-size:12px;min-height:28px;padding:5px 9px}.fg-how{font-size:14px;color:var(--fg-muted);border-top:1px solid var(--fg-line);padding-top:10px;margin-top:8px}.fg-how summary{cursor:pointer;color:var(--fg-accent)}.fg-build{font-size:11px;color:var(--fg-muted);text-align:right;margin:10px 0 0}.fg-sr{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.fg-measure{position:fixed;left:-10000px;top:0;width:520px;height:280px;pointer-events:none;visibility:hidden}
/* Presentation view has no host navigation, admin controls or personal records. */
body.fg-classroom>header,body.fg-classroom>footer,body.fg-classroom .site-header,body.fg-classroom .site-footer,body.fg-classroom .tutee-preview-bar{display:none!important}
body.fg-classroom{background:white!important}body.fg-classroom main{max-width:none!important;margin:0!important;padding:0!important}
.fg-app.is-classroom{max-width:1600px;min-height:100dvh;padding:20px 4vw;background:white}
.fg-app.is-classroom .fg-heading{margin-bottom:10px}.fg-app.is-classroom h1{font-size:28px}.fg-app.is-classroom .fg-heading p,.fg-app.is-classroom .fg-admin-control,.fg-app.is-classroom .fg-entry-help,.fg-app.is-classroom .fg-build,.fg-app.is-classroom .fg-how{display:none!important}
.fg-app.is-classroom .fg-prompt{font-size:clamp(24px,3vw,46px);margin-top:12px}.fg-app.is-classroom .fg-stage{height:clamp(240px,51vh,600px);width:min(100%,1250px)}.fg-app.is-classroom .fg-drawing{padding:24px 70px}.fg-app.is-classroom .fg-answer-form{max-width:760px}.fg-app.is-classroom input{font-size:38px;height:74px}.fg-app.is-classroom .fg-feedback{font-size:23px}.fg-app.is-classroom .fg-result-formula{font-size:40px}.fg-app.is-classroom .fg-result-name{font-size:21px}
.fg-app:fullscreen{overflow:auto;background:#fff;width:100%;max-width:none;min-height:100vh}
@media(max-width:700px){.fg-app{padding:16px 14px 10px}.fg-heading{align-items:flex-start;gap:8px}.fg-heading h1{font-size:26px}.fg-heading p{font-size:13px}.fg-top-actions{gap:5px;flex-shrink:0;flex-direction:column}.fg-top-actions button{font-size:12px;min-height:31px;padding:7px 9px}.fg-scoreline{gap:12px;font-size:12px;min-height:44px}.fg-scoreline strong{font-size:18px}.fg-scoreline>span:first-child{display:none}.fg-scoreline .fg-end{font-size:12px;padding-inline:5px}.fg-clock{font-size:22px}.fg-stage{height:clamp(180px,29vh,260px);margin-bottom:7px}.fg-drawing{padding:14px 16px}.fg-prompt{font-size:20px;margin-top:13px}.fg-answer-form{gap:7px}.fg-answer-form input{height:54px;font-size:27px;padding:9px}.fg-answer-form button{min-width:94px;font-size:18px;padding:9px 12px}.fg-feedback{font-size:14px;min-height:61px;padding-top:8px}.fg-feedback .fg-result-formula{font-size:26px}.fg-feedback .fg-result-name{font-size:13px}.fg-settings{gap:9px}.fg-settings label{flex-basis:44%}.fg-admin-control{gap:6px}.fg-admin-control a{display:none}.fg-app.is-classroom{padding:14px}.fg-app.is-classroom .fg-stage{height:40vh}.fg-app.is-classroom .fg-drawing{padding:15px}.fg-app.is-classroom h1{font-size:24px}.fg-app.is-classroom .fg-answer-form{flex-wrap:wrap}.fg-app.is-classroom .fg-answer-form input{flex-basis:100%}.fg-app.is-classroom .fg-feedback{font-size:17px}}
@media(max-height:620px) and (max-width:800px){.fg-heading{margin-bottom:8px}.fg-heading p{display:none}.fg-stage{height:145px;max-height:27vh}.fg-prompt{font-size:18px;margin:8px 0 0}.fg-feedback{min-height:51px}.fg-entry-help{display:none}}
@media(prefers-reduced-motion:reduce){.fg-app *{transition:none!important;animation:none!important}}
.fg-review h2{font-size:24px;margin:26px 0 12px}.fg-review h3{font-size:18px;margin:14px 0 6px}.fg-review table{border-collapse:collapse;width:100%;font-size:13px}.fg-review th,.fg-review td{padding:9px 7px;border-bottom:1px solid var(--fg-line);text-align:left;vertical-align:top}.fg-review td:first-child{font-family:monospace;max-width:220px;overflow-wrap:anywhere}.fg-review button{font-size:12px;min-height:30px;padding:6px 9px;margin:3px}.fg-review-scroll{overflow-x:auto;margin-top:12px}.fg-review [data-fr-distributions]{display:grid;grid-template-columns:1fr 1fr;gap:30px}.fg-review meter{width:150px;max-width:100%;height:14px;margin-left:10px}.fg-review p{font-size:14px}.fg-review select{font-size:15px;padding:8px;background:white;border:1px solid var(--fg-line)}
@media(max-width:650px){.fg-review [data-fr-distributions]{grid-template-columns:1fr;gap:10px}}

.fg-app.is-classroom [data-fg-save-status]{display:none}

@media(max-width:700px){
 body.fg-keyboard .site-header{display:none!important}
 .fg-app.has-keyboard{padding-block:5px}
 .fg-app.has-keyboard .fg-heading{display:none}
 .fg-app.has-keyboard .fg-stage{height:145px}
 .fg-app.has-keyboard .fg-prompt{margin-top:5px;font-size:17px}
 .fg-app.has-keyboard .fg-entry-help,.fg-app.has-keyboard .fg-how,.fg-app.has-keyboard .fg-build{display:none}
}
.fg-app.is-classroom [data-fg-history]{display:none!important}

/* Formula challenge 0.2.0: words-only problems share the input and round controls. */
.fg-kind-switch{display:flex;gap:0;margin:0 0 14px;flex-wrap:wrap}
.fg-kind-switch button{border-color:var(--fg-line);background:transparent;color:var(--fg-accent);font-size:15px;padding:8px 18px;border-radius:0;min-height:38px}
.fg-kind-switch button:first-child{border-radius:5px 0 0 5px}
.fg-kind-switch button:last-child{border-radius:0 5px 5px 0;margin-left:-1px}
.fg-kind-switch button[aria-pressed="true"]{background:var(--fg-accent);color:white;border-color:var(--fg-accent)}
.fg-app.is-hidden-question .fg-stage{height:auto;min-height:220px;width:min(100%,840px);overflow:visible;margin:6px auto 18px}
.fg-app.is-hidden-question .fg-drawing{padding:14px 28px;line-height:1.35;display:block}
.fg-hidden-clues{width:100%;font-size:20px;color:var(--fg-ink)}
.fg-hidden-intro{font-size:14px;color:var(--fg-muted);margin:0 0 3px}
.fg-carbon-total{font-size:24px;margin:0 0 15px;line-height:1.2}
.fg-carbon-total strong{font-size:44px;font-weight:600;color:var(--fg-accent)}
.fg-clue-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;column-gap:30px;row-gap:10px}
.fg-clue-list li{padding:0;margin:0;line-height:1.4;font-size:inherit}
.fg-clue-list .fg-long-clue{grid-column:1 / -1}
.fg-clue-closure{font-size:13px;color:var(--fg-muted);line-height:1.45;margin:16px 0 0;max-width:750px}
.fg-app .fg-admin-control .fg-skip{color:var(--fg-accent)!important}
.fg-app.is-hidden-question .fg-loading{position:relative;min-height:190px}
.fg-app.is-hidden-question .fg-prompt{margin-top:16px}
.fg-app.is-classroom .fg-kind-switch{margin-bottom:6px}
.fg-app.is-classroom.is-hidden-question .fg-stage{min-height:360px;width:min(100%,1220px);margin:0 auto 18px}
.fg-app.is-classroom.is-hidden-question .fg-drawing{padding:15px 32px}
.fg-app.is-classroom .fg-hidden-clues{font-size:clamp(22px,2vw,32px)}
.fg-app.is-classroom .fg-carbon-total{font-size:32px;margin-bottom:20px}
.fg-app.is-classroom .fg-carbon-total strong{font-size:64px}
.fg-app.is-classroom .fg-hidden-intro{font-size:19px}
.fg-app.is-classroom .fg-clue-closure{font-size:20px;max-width:none}
@media(max-width:700px){
 .fg-kind-switch{margin-bottom:10px}.fg-kind-switch button{font-size:14px;min-height:36px;padding:8px 15px}
 .fg-app.is-hidden-question .fg-stage{margin-bottom:12px;min-height:0}
 .fg-app.is-hidden-question .fg-drawing{padding:12px 14px}
 .fg-hidden-clues{font-size:17px}.fg-hidden-intro{font-size:12px}
 .fg-carbon-total{font-size:19px;margin-bottom:12px}.fg-carbon-total strong{font-size:35px}
 .fg-clue-list{grid-template-columns:1fr;gap:7px}.fg-clue-list .fg-long-clue{grid-column:auto}
 .fg-clue-closure{font-size:12px;margin-top:12px}
 .fg-app.is-hidden-question.has-keyboard .fg-stage{height:auto}
 .fg-app.is-hidden-question.has-keyboard .fg-drawing{padding:5px 9px}
 .fg-app.is-hidden-question.has-keyboard .fg-hidden-intro{display:none}
 .fg-app.is-hidden-question.has-keyboard .fg-hidden-clues{font-size:15px}
 .fg-app.is-hidden-question.has-keyboard .fg-carbon-total{margin-bottom:5px;font-size:16px}
 .fg-app.is-hidden-question.has-keyboard .fg-carbon-total strong{font-size:26px}
 .fg-app.is-hidden-question.has-keyboard .fg-clue-list{gap:4px}
 .fg-app.has-keyboard .fg-kind-switch{display:none}
 .fg-app.is-classroom.is-hidden-question .fg-drawing{padding:12px 8px}
 .fg-app.is-classroom .fg-clue-closure{font-size:15px}
}

/* Keep teacher controls wide enough for their labels. */
.fg-app .fg-answer-form button{flex-shrink:0}
.fg-app.is-classroom .fg-answer-form{width:min(100%,850px);max-width:850px}