/* R004. Quiet, single-task game surface within the existing Nordlicht shell. */
#nlg{--ink:#19362e;--muted:#53665e;--accent:#215941;--paper:#fff;--line:#d7e0d8;--soft:#eaf0e7;--bg:#f7f8f4;color:var(--ink);background:var(--bg);font:16px/1.6 system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;isolation:isolate;overflow-wrap:anywhere}
#nlg *{box-sizing:border-box;min-width:0}
#nlg [hidden]{display:none!important}
#nlg button,#nlg input{font:inherit}
#nlg button,#nlg summary,#nlg label{touch-action:manipulation}
#nlg button{cursor:pointer;min-height:48px;border:1px solid var(--line);background:var(--paper);color:var(--ink);border-radius:10px;padding:11px 17px;line-height:1.4}
#nlg button:hover:not(:disabled){background:var(--soft);border-color:var(--accent)}
#nlg button.primary{display:inline-flex;justify-content:center;align-items:center;background:var(--accent);color:#fff;border-color:var(--accent);font-weight:700;min-height:52px;padding:14px 24px}
#nlg button.primary:hover:not(:disabled){background:#173f2f}
#nlg button:disabled{cursor:default;opacity:1;background:#e3e8e3;color:#68766d;border-color:#e3e8e3}
#nlg button.text-button{background:transparent;border-color:transparent;text-decoration:underline;text-underline-offset:4px;padding:10px 2px}
#nlg :focus-visible{outline:3px solid #976919;outline-offset:4px}
#nlg a{color:var(--accent);text-underline-offset:4px}
#nlg h1,#nlg h2,#nlg h3,#nlg p{margin:0}
#nlg h1{font:500 clamp(29px,4vw,42px)/1.15 Georgia,serif;letter-spacing:-.025em}
#nlg h2{font-size:clamp(23px,3vw,29px);line-height:1.25;letter-spacing:-.025em}
#nlg h3{font-size:17px;line-height:1.4}
#nlg p+p{margin-top:12px}
#nlg .eyebrow{font-size:12px;font-weight:750;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);margin-bottom:9px}
#nlg main{width:min(820px,calc(100% - 48px));margin:auto;padding:22px 0 64px}
#nlg .lead{margin-top:16px;max-width:650px;font-size:18px;color:var(--muted)}
#nlg .start-steps{list-style:none;padding:0;margin:24px 0;display:flex;flex-wrap:wrap;gap:12px 24px;font-size:14px}
#nlg .start-steps li{display:flex;align-items:center;gap:8px}
#nlg .start-steps span,#nlg .steps li>span{display:inline-flex;align-items:center;justify-content:center;flex:none;width:25px;height:25px;border:1px solid #b6c8b8;border-radius:50%;font-size:12px;font-weight:750}
#nlg .start-case{display:flex;gap:24px;align-items:flex-start;padding:30px;border:1px solid var(--line);border-radius:18px;background:var(--paper);box-shadow:0 8px 28px #19362e08}
#nlg .case-symbol{width:62px;height:62px;flex:0 0 62px;border-radius:50%;border:1px solid #c4d5c0;background:var(--soft);font:italic 39px/62px Georgia,serif;text-align:center}
#nlg .start-case p:not(.eyebrow){margin:12px 0 22px;max-width:590px}
#nlg .home-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:12px}
#nlg .progress-count{color:var(--muted);font-size:14px}
#nlg .small-note{font-size:14px;color:var(--muted)}
#nlg .save-options{margin-top:30px;border-top:1px solid var(--line)}
#nlg .game-info{margin-top:0;border-top:1px solid var(--line)}
#nlg summary{cursor:pointer;min-height:48px;padding:13px 0;font-size:15px;font-weight:600}
#nlg .details-body{padding:3px 0 18px}
#nlg .details-body p+p{margin-top:14px}
#nlg .save-choice{display:flex;align-items:center;gap:12px;min-height:48px;cursor:pointer}
#nlg input[type=checkbox]{width:20px;height:20px;accent-color:var(--accent);flex:none}
#nlg .secondary-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
#nlg #storageMessage{font-size:14px;margin-top:12px}
#nlg #storageMessage:empty{display:none}
#nlg .game-top{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:-12px 0 16px}
#nlg .case-heading{margin-bottom:20px}
#nlg .case-heading h1{font-size:clamp(26px,3.6vw,36px)}
#nlg .steps{list-style:none;display:grid;grid-template-columns:1fr 1fr 1.3fr;gap:10px;margin:0 0 22px;padding:0}
#nlg .steps li{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--muted);padding:12px 0;border-bottom:3px solid var(--line)}
#nlg .steps li.active{border-color:var(--accent);font-weight:750;color:var(--ink)}
#nlg .steps li.active>span,#nlg .steps li.done>span{background:var(--accent);color:#fff;border-color:var(--accent)}
#nlg .task-panel{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:28px 32px;box-shadow:0 8px 28px #19362e08}
#nlg .task-intro{margin-top:12px;color:var(--muted)}
#nlg .clue-list{display:grid;gap:12px;margin:22px 0}
#nlg .clue-card{display:flex;gap:14px;align-items:flex-start;padding:18px;background:#f1f5ed;border-radius:10px;border:1px solid #e1e8dd}
#nlg .clue-number{width:24px;height:24px;flex:0 0 24px;border-radius:50%;background:#dce8d5;color:#274a35;font-size:12px;line-height:24px;font-weight:700;text-align:center;margin-top:1px}
#nlg .measurement{font-size:14px;color:#46594e;padding-top:10px;border-top:1px solid #d4dfd0}
#nlg fieldset{padding:0;border:0;margin:22px 0 0}
#nlg .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}
#nlg .choices{display:grid;gap:10px}
#nlg .answer-choice{position:relative;display:flex;align-items:flex-start;gap:12px;min-height:58px;padding:15px 17px;border:1px solid var(--line);background:var(--paper);border-radius:11px;cursor:pointer;line-height:1.5}
#nlg .answer-choice:hover{border-color:#7e9b80;background:#f8faf6}
#nlg .answer-choice.selected{border:2px solid var(--accent);padding:14px 16px;background:var(--soft)}
#nlg .answer-choice input{position:absolute;opacity:0;width:1px;height:1px}
#nlg .answer-choice:has(input:focus-visible){outline:3px solid #976919;outline-offset:3px}
#nlg .answer-letter{display:flex;align-items:center;justify-content:center;flex:0 0 25px;width:25px;height:25px;border:1px solid #b6c8b8;border-radius:50%;font-size:12px;font-weight:750;margin-top:0}
#nlg .selected .answer-letter{background:var(--accent);border-color:var(--accent);color:#fff}
#nlg form>button{margin-top:22px}
#nlg .clues-again{margin-top:20px;border-top:1px solid var(--line)}
#nlg .clues-again .clue-list{margin:0}
#nlg .answer-feedback{margin-top:18px;padding:14px 16px;border-left:4px solid #a97825;border-radius:6px;background:#fbf1dc;color:#59411c}
#nlg .accepted-answer{display:flex;align-items:flex-start;gap:10px;margin-top:18px;padding:13px 15px;border-radius:8px;background:var(--soft);font-size:15px}
#nlg .accepted-answer>span{font-weight:800}
#nlg .result-panel{position:relative}
#nlg .result-mark{float:right;width:46px;height:46px;border-radius:50%;background:var(--soft);font-size:26px;text-align:center;line-height:46px;color:var(--accent)}
#nlg .result-explanation{margin-top:18px;font-size:18px}
#nlg .result-action{background:var(--soft);border-radius:10px;padding:18px;margin-top:22px}
#nlg .result-action p{margin-top:8px}
#nlg .result-limit{font-size:14px;color:var(--muted);margin-top:18px}
#nlg .result-buttons{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:24px}
#nlg .result-background{margin-top:24px;border-top:1px solid var(--line)}
#nlg .knowledge-note{border-top:1px solid var(--line);padding-top:20px;margin-top:22px}
#nlg .knowledge-note p{margin-top:10px}
#nlg .knowledge-note a{display:block;min-height:44px;padding:10px 0;font-size:14px}
#nlg .case-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:24px}
#nlg .case-group{padding:22px;border-radius:14px;background:var(--paper);border:1px solid var(--line)}
#nlg .case-group h2{font-size:21px}
#nlg .case-buttons{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
#nlg .case-buttons button{flex-grow:1;font-size:14px}
@media(max-width:600px){
 #nlg main{width:calc(100% - 32px);padding-top:16px;padding-bottom:36px}
 #nlg .start-steps{display:grid;gap:8px;margin:20px 0}
 #nlg .start-case{padding:22px;gap:0}
 #nlg .case-symbol{display:none}
 #nlg .start-case h2{font-size:25px}
 #nlg .start-case button.primary{width:100%}
 #nlg .home-bottom{align-items:flex-start;flex-direction:column;gap:0;margin-top:18px}
 #nlg .task-panel{padding:22px 18px;border-radius:14px}
 #nlg .steps{gap:8px;grid-template-columns:.9fr 1fr 1.4fr;margin-bottom:18px}
 #nlg .steps li{font-size:12px;gap:5px;line-height:1.3;align-items:flex-start}
 #nlg .steps li>span{width:21px;height:21px;font-size:11px}
 #nlg .clue-card{padding:14px 12px;gap:10px}
 #nlg .answer-choice{padding:14px 12px;gap:10px}
 #nlg .answer-choice.selected{padding:13px 11px}
 #nlg .task-panel button.primary{width:100%}
 #nlg .result-buttons{gap:8px}
 #nlg .result-explanation{font-size:16px}
 #nlg .case-grid{grid-template-columns:1fr}
 #nlg .secondary-actions button{width:100%}
}
@media(prefers-reduced-motion:reduce){#nlg *{scroll-behavior:auto!important}}