/* Study 01 extends the existing chamber shell. Body retains its original presentation. */
.study-switch{display:flex;gap:4px;margin:0 0 18px;border-bottom:1px solid var(--line);padding-bottom:8px}
.study-switch button{font:10px var(--mono);padding:8px 13px;background:transparent;color:var(--muted)}
.study-switch button[aria-pressed=true]{background:var(--ink);color:var(--lime)}
.impact-panel{margin:0 0 12px;padding:12px 14px;background:#f3f5eabf;border:1px solid #b9c3b0}
.comparison-buttons{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-bottom:8px}
.comparison-buttons button{padding:10px;text-align:left;border:1px solid #abb7a0;background:transparent;font:11px var(--mono);color:var(--ink)}
.comparison-buttons button span{font:11px Arial,sans-serif;margin-left:7px}
.comparison-buttons button[aria-pressed=true]{background:var(--ink);border-color:var(--ink);color:#e4f3ba}
.impact-panel summary{padding:10px 0}.impact-panel summary span{font-size:8px}
.impact-layers{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:4px 0 12px;font-size:10px}
.impact-layers label{display:flex;align-items:center;gap:5px}.impact-layers input{accent-color:#46633a}
.impact-layers label:has(input:disabled){opacity:.5}.reset-mix{background:transparent;color:var(--ink);font:10px var(--mono);padding:5px 0;text-decoration:underline;text-underline-offset:3px}
.impact-panel details>.fineprint{margin:5px 0 10px}.impact-panel>p:last-child{margin-top:8px}
.study-questions b{font-weight:400}
.impact-hud{position:absolute;left:36px;top:121px;display:flex;flex-direction:column;gap:7px;font:9px var(--mono);letter-spacing:1px;background:#f0f3e6cc;padding:11px 12px;border-left:2px solid #708451}
.impact-hud>span:last-child{color:#586c4c;font-size:8px}.impact-hud b{font-weight:400;margin-left:4px}
.impact-study.motion-off #crosshair.hit span{animation:none}
@media(min-width:901px){.impact-study h1{font-size:46px;letter-spacing:-2.5px;margin:17px 0}.impact-study .lead{font-size:16px;margin-bottom:9px}.impact-study .description{margin-bottom:15px}.impact-study .control-grid{padding:12px 0;gap:8px 14px}}
@media(max-width:900px){.impact-hud{left:20px;top:103px}.impact-study h1{font-size:46px;letter-spacing:-2.5px}.impact-panel summary span{max-width:110px;text-align:right;line-height:1.5}}