.adaptive-space{--ad-ink:#282a25;--ad-muted:#74776d;--ad-line:#e5e6dc;--ad-surface:#fff;--ad-soft:#f6f7f1;--ad-gold:#f0d76a;--ad-green:#537665;color:var(--ad-ink);width:100%;max-width:1320px;margin:0 auto;font-size:14px;line-height:1.7}
.adaptive-space *{box-sizing:border-box}.adaptive-space button,.adaptive-space input{font:inherit}.adaptive-space button{cursor:pointer}.adaptive-space button:disabled{cursor:default;opacity:.5}.adaptive-space :focus-visible{outline:3px solid #9a7421;outline-offset:4px}.adaptive-space h1,.adaptive-space h2,.adaptive-space h3,.adaptive-space p{margin:0}.adaptive-space h1{font-size:clamp(25px,2.6vw,36px);line-height:1.4;letter-spacing:-1.2px;font-weight:650}.adaptive-space h2{font-size:20px;line-height:1.5;font-weight:650}.adaptive-space h3{font-size:18px;line-height:1.5}.adaptive-space svg{vertical-align:middle}.ad-eyebrow{font-size:10px;font-weight:700;letter-spacing:1.8px;color:var(--ad-muted);display:flex;align-items:center;gap:7px}.ad-heading{display:flex;justify-content:space-between;gap:24px;align-items:center;margin:8px 0 30px}.ad-heading h1{margin:9px 0}.ad-heading h1 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span{font-size:10px;color:#7d8366;letter-spacing:2px}.ad-gridline{stroke:var(--ad-line);fill:none;stroke-width:1}.ad-curve{stroke:#688976;fill:none;stroke-width:3;stroke-linecap:round}.ad-secant{stroke:#c29a38;fill:none;stroke-width:2;stroke-dasharray:5 4}.adaptive-space svg circle{fill:#688976;stroke:var(--ad-surface);stroke-width:2}.adaptive-space svg text{font-size:11px;fill:var(--ad-muted)}.ad-next-footer{display:flex;align-items:center;gap:9px;padding-top:5px}.ad-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--ad-line);background:var(--ad-surface);color:var(--ad-ink);font-size:12px!important;font-weight:600;border-radius:8px;min-height:40px;padding:9px 14px;transition:background .15s,transform 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li{display:flex;align-items:center;gap:16px;padding:18px 0;border-bottom:1px solid var(--ad-line)}.ad-plan-list li:last-child{border:0;padding-bottom:3px}.ad-plan-list li>span{display:grid;place-items:center;width:32px;height:32px;border:1px solid var(--ad-line);border-radius:50%;font-size:10px;color:var(--ad-muted);flex-shrink:0}.ad-plan-list li>div{flex:1}.ad-plan-list strong{font-size:13px;font-weight:550}.ad-plan-list p{font-size:11px;color:var(--ad-muted);margin-top:3px}.ad-plan-list li>small{font-size:10px;color:#929589;white-space:nowrap}.ad-evidence-card{background:var(--ad-surface);border:1px solid var(--ad-line);border-radius:16px;padding:23px}.ad-tiny-star{color:#b9a761;font-size:22px}.ad-subtitle{font-size:11px;color:var(--ad-muted);margin-top:3px!important}.ad-evidence-stats{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:19px 0}.ad-evidence-stats>div+div{border-left:1px solid var(--ad-line);padding-left:20px}.ad-evidence-stats 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h2{font-size:19px}.ad-text-button{background:none;border:0;font-size:12px!important;display:flex;gap:8px;align-items:center;color:var(--ad-muted)}.ad-path{display:grid;grid-template-columns:repeat(4,1fr);margin-top:20px;border:1px solid var(--ad-line);border-radius:12px;overflow:hidden;background:var(--ad-surface)}.ad-path>div,.ad-path>button{text-align:left;min-width:0;padding:20px 19px;background:none;border:0;border-right:1px solid var(--ad-line);color:inherit}.ad-path>*:last-child{border-right:0}.ad-path>.is-current{background:#f4f4e5}.ad-path>button:hover{background:var(--ad-soft)}.ad-path span,.ad-path strong,.ad-path small{display:block}.ad-path span{font-size:10px;color:var(--ad-muted);margin-bottom:7px}.ad-path strong{font-size:13px;font-weight:550}.ad-path small{font-size:10px;color:var(--ad-muted);margin-top:7px}.ad-boundary{font-size:10px;color:#8c9085;padding:12px 0 26px;max-width:840px}.ad-lesson-top{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:7px 0 26px}.ad-lesson-top>span{font-size:11px;color:var(--ad-muted)}.ad-lesson-top>.ad-button{background:none;border:0;padding-left:0}.ad-stepper{padding:0;list-style:none;display:flex;gap:24px;margin:0 0 24px}.ad-stepper li{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--ad-muted);position:relative}.ad-stepper li>span{display:grid;place-items:center;width:25px;height:25px;border:1px solid var(--ad-line);border-radius:50%;font-size:10px}.ad-stepper li.is-current{color:var(--ad-ink);font-weight:650}.ad-stepper .is-current>span{background:var(--ad-gold);border-color:#d6bd56}.ad-stepper .is-past>span{background:#eaf0e7;border-color:#d1ddcd;color:#52785d}.ad-lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 255px;gap:28px;align-items:start}.ad-lesson-card{background:var(--ad-surface);border:1px solid var(--ad-line);border-radius:18px;padding:34px 38px}.ad-lesson-card h2{font-size:26px;margin:12px 0 17px;letter-spacing:-.7px}.ad-lesson-card>p:not(.ad-eyebrow):not(.ad-fine){color:#666d60;line-height:1.9}.ad-lesson-side{padding:22px 3px}.ad-lesson-side h3{margin:12px 0 19px;font-size:19px}.ad-lesson-side ul{padding-left:17px;font-size:12px;color:var(--ad-muted);line-height:2.5;margin-bottom:25px}.ad-side-note{border-top:1px solid var(--ad-line);padding-top:20px}.ad-side-note strong{font-size:12px;font-weight:600}.ad-side-note p{font-size:12px;color:var(--ad-muted);margin-top:8px}.ad-position-line{display:flex;align-items:center;justify-content:center;gap:30px;background:var(--ad-soft);border-radius:12px;padding:25px;margin:24px 0}.ad-position-line small{display:block;font-size:11px;color:var(--ad-muted)}.ad-position-line strong{font-size:32px;font-weight:500;display:block}.ad-position-line strong span{font-size:12px;font-weight:400}.ad-position-arrow{font-size:11px;color:#8b957d}.ad-question{font-size:14px;font-weight:600;margin:20px 0 13px!important;color:var(--ad-ink)!important}.ad-choices{display:grid;gap:9px}.ad-choices button{border:1px solid var(--ad-line);background:var(--ad-surface);color:inherit;text-align:left;border-radius:8px;min-height:46px;padding:12px 15px;font-size:12px}.ad-choices button:hover{background:var(--ad-soft)}.ad-choices .is-selected{background:#f7f3de;border-color:#cdb965}.ad-feedback{background:var(--ad-soft);border-left:3px solid #a6b497;padding:17px 20px;margin-top:21px;border-radius:0 8px 8px 0}.ad-feedback strong{font-size:13px}.ad-feedback p{font-size:12px;color:var(--ad-muted);margin-top:6px;line-height:1.9}.ad-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.ad-explore{display:grid;grid-template-columns:1.1fr 1fr;gap:22px;margin:20px 0;background:var(--ad-soft);padding:20px;border-radius:12px;align-items:center}.ad-plot svg{width:100%}.ad-slider-label{font-size:11px;display:flex;justify-content:space-between;gap:10px}.ad-slider-label strong{color:var(--ad-green)}#ad-window{accent-color:#718775;width:100%;margin:14px 0 0}.ad-slider-ticks{display:flex;justify-content:space-between;font-size:9px;color:var(--ad-muted)}.ad-rate{margin-top:20px}.ad-rate small{font-size:10px;color:var(--ad-muted);display:block}.ad-rate strong{font-size:29px;font-weight:500;display:block}.ad-rate strong span{font-size:11px}.ad-formula{padding:20px 0;border-bottom:1px solid var(--ad-line)}.ad-formula>span{display:block;font-size:10px;color:var(--ad-muted)}.ad-formula strong{display:block;font-family:Georgia,serif;font-size:20px;font-weight:400;margin:5px 0 9px;overflow-wrap:anywhere}.ad-formula p{font-size:12px;color:var(--ad-muted)}.ad-algebra,.ad-answer-review{margin-top:17px;padding:15px 17px;border:1px solid var(--ad-line);border-radius:8px;font-size:12px}.ad-algebra summary,.ad-answer-review summary,.ad-event-details summary{cursor:pointer;color:var(--ad-green);font-weight:550}.ad-algebra p,.ad-answer-review p{margin-top:10px;color:var(--ad-muted)}.ad-answer-label{display:block;font-size:12px;font-weight:550;margin:24px 0 8px}.ad-answer-label span{font-size:11px;font-weight:400;color:var(--ad-muted)}#ad-number{width:100%;max-width:350px;background:var(--ad-surface);color:var(--ad-ink);border:1px solid var(--ad-line);border-radius:8px;padding:13px 15px;min-height:48px}.adaptive-space fieldset{border:0;margin:22px 0 0;padding:0}.adaptive-space legend{font-size:12px;font-weight:550;margin-bottom:10px}.adaptive-space legend span{font-size:10px;color:var(--ad-muted);font-weight:400}.ad-radio{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border:1px solid var(--ad-line);border-radius:8px;margin-bottom:8px;font-size:12px;cursor:pointer}.ad-radio:has(input:checked){border-color:#cdb965;background:#f7f3de}.ad-radio input{margin-top:4px;accent-color:#8e7840;flex-shrink:0}.ad-confidence label{display:inline-flex;align-items:center;gap:5px;margin:0 17px 9px 0;font-size:11px}.ad-confidence input{accent-color:#718775}.ad-receipt-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;background:var(--ad-soft);border-radius:10px;padding:20px;margin-top:25px}.ad-receipt-summary small{display:block;font-size:10px;color:var(--ad-muted)}.ad-receipt-summary strong{display:block;font-size:12px;margin-top:6px;font-weight:550}.ad-full-evidence{padding:30px 38px;background:var(--ad-surface);border:1px solid var(--ad-line);border-radius:16px;max-width:970px}.ad-full-evidence h1{font-size:29px;margin:12px 0}.ad-full-evidence>p:not(.ad-eyebrow){font-size:13px;color:var(--ad-muted);margin-bottom:27px}.ad-full-evidence>.ad-evidence-row{padding:18px 0}.ad-full-evidence h2{font-size:17px;margin:26px 0 15px}.ad-scope{background:var(--ad-soft);border-radius:9px;padding:20px;margin-top:20px}.ad-scope strong{font-size:12px}.ad-scope p{font-size:12px;color:var(--ad-muted);margin:6px 0 12px}.ad-scope p:last-child{margin-bottom:0}.ad-log article{border-top:1px solid var(--ad-line);padding:16px 0}.ad-log article>div{display:flex;justify-content:space-between;gap:10px}.ad-log strong{font-size:13px}.ad-log small{font-size:10px;color:var(--ad-muted)}.ad-log p{font-size:12px;margin:7px 0}.ad-log article>small{display:block;margin-top:8px}.ad-empty{background:var(--ad-soft);padding:25px;border-radius:8px;color:var(--ad-muted);font-size:12px}.ad-event-details{border-top:1px solid var(--ad-line);padding-top:18px;margin-top:16px;font-size:11px}.ad-event-details p{margin-top:8px;color:var(--ad-muted)}.ad-save-warning{margin-top:15px;color:#936128;font-size:12px}
[data-theme=dark] .adaptive-space,html[data-theme=dark] .adaptive-space{--ad-ink:#e5e9df;--ad-muted:#a1aa98;--ad-line:#414939;--ad-surface:#252c24;--ad-soft:#30382c;--ad-green:#a3b69c}.adaptive-space h1:focus,.adaptive-space h2:focus{outline:none}[data-theme=dark] .ad-next{background:#363826;border-color:#5a5838}[data-theme=dark] .ad-review-card{background:#313d2e}[data-theme=dark] .ad-path>.is-current,[data-theme=dark] .ad-choices .is-selected,[data-theme=dark] .ad-radio:has(input:checked){background:#46442d}[data-theme=dark] .ad-next-content p,[data-theme=dark] .ad-lesson-card>p:not(.ad-eyebrow):not(.ad-fine){color:#bac1ae}
@media(min-width:1500px){.ad-home-grid{grid-template-columns:minmax(0,1fr) 340px}.ad-next-content{padding:33px 0}.ad-next{padding:30px}.ad-plan{padding:25px 30px}}
@media(max-width:1150px){.ad-home-grid{grid-template-columns:minmax(0,1fr) 270px;gap:18px}.ad-next{padding:22px}.ad-next-content{grid-template-columns:minmax(0,1fr) 100px}.ad-plan .ad-section-head{align-items:flex-start;flex-direction:column}.ad-evidence-card{padding:19px}.ad-evidence-row{flex-direction:column;gap:6px}.ad-lesson-layout{grid-template-columns:minmax(0,1fr) 210px;gap:18px}.ad-lesson-card{padding:28px}.ad-explore{grid-template-columns:1fr 1fr;gap:10px;padding:16px}.ad-path>div,.ad-path>button{padding:18px 14px}}
@media(max-width:900px){.ad-home-grid{grid-template-columns:1fr}.ad-side-column{display:grid;grid-template-columns:1fr 1fr;gap:18px}.ad-evidence-row{flex-direction:row}.ad-date{display:none}.ad-next-content{grid-template-columns:minmax(0,1fr) 140px}.ad-lesson-layout{grid-template-columns:1fr}.ad-lesson-side{padding:15px}.ad-lesson-side ul{margin-bottom:10px}.ad-lesson-side .ad-fine{max-width:550px}.ad-lesson-side h3{margin:8px 0}.ad-path{grid-template-columns:1fr 1fr}.ad-path>:nth-child(2){border-right:0}.ad-path>:nth-child(-n+2){border-bottom:1px solid var(--ad-line)}.ad-plan .ad-section-head{flex-direction:row;align-items:center}}
@media(max-width:560px){.ad-heading{margin:5px 0 22px}.adaptive-space h1{font-size:26px;letter-spacing:-.7px}.ad-heading h1 span{display:block}.ad-heading>div>p:last-child{font-size:12px}.ad-eyebrow{font-size:9px;letter-spacing:1.2px}.ad-next{padding:20px;border-radius:13px}.ad-card-top{align-items:flex-start;flex-wrap:wrap}.ad-next-content{grid-template-columns:1fr;padding:20px 0}.ad-mini-plot{display:none}.ad-next-content h2{font-size:23px}.ad-next-content p{font-size:12px}.ad-next-footer{align-items:stretch;flex-direction:column}.ad-button{min-height:43px}.ad-next-footer .ad-button+ .ad-button{background:transparent;border:0;font-size:11px!important}.ad-side-column{grid-template-columns:1fr}.ad-plan{padding:20px 18px}.ad-plan .ad-section-head{flex-direction:column;align-items:flex-start;gap:12px}.ad-plan-list li{gap:11px}.ad-plan-list li>small{display:none}.ad-plan-list li>span{width:28px;height:28px}.ad-evidence-row{flex-direction:row}.ad-course-map{padding-top:8px;margin-top:22px}.ad-course-map h2{font-size:17px}.ad-course-map .ad-section-head{align-items:flex-end}.ad-course-map .ad-text-button{font-size:10px!important;white-space:nowrap}.ad-path strong{font-size:12px}.ad-path small{font-size:9px}.ad-path>div,.ad-path>button{padding:16px 12px}.ad-lesson-top{flex-direction:column;align-items:flex-start;gap:4px;margin-bottom:20px}.ad-stepper{gap:11px;justify-content:space-between}.ad-stepper li{flex-direction:column;gap:5px;font-size:10px}.ad-lesson-card{padding:23px 19px;border-radius:12px}.ad-lesson-card h2{font-size:24px}.ad-lesson-card>p{font-size:13px}.ad-position-line{padding:22px 15px;gap:20px}.ad-position-arrow{font-size:10px}.ad-position-line strong{font-size:27px}.ad-choices button{font-size:12px;padding:13px}.ad-explore{grid-template-columns:1fr;padding:17px}.ad-plot svg{max-height:185px}.ad-rate{margin-top:12px}.ad-rate strong{font-size:26px}.ad-formula strong{font-size:18px}.ad-actions{flex-direction:column;align-items:stretch}.ad-receipt-summary{grid-template-columns:1fr;gap:12px;padding:17px}.ad-receipt-summary>div{display:flex;align-items:center;justify-content:space-between}.ad-receipt-summary strong{margin:0}.ad-full-evidence{padding:24px 20px}.ad-full-evidence h1{font-size:25px}.ad-full-evidence>.ad-evidence-row{flex-direction:column}.ad-log article>div{flex-wrap:wrap}.ad-boundary{line-height:1.9}.ad-lesson-side{padding:12px 2px}}
@media(prefers-reduced-motion:reduce){.adaptive-space *{transition:none!important;scroll-behavior:auto!important}}

.ad-workspace-tools{display:flex;align-items:center;gap:13px;margin:-8px 0 23px;flex-wrap:wrap}.ad-workspace-tools label{display:flex;gap:9px;align-items:center;font-size:11px;color:var(--ad-muted)}.ad-workspace-tools select{border:1px solid var(--ad-line);border-radius:6px;background:var(--ad-surface);color:var(--ad-ink);padding:6px 24px 6px 9px;font:inherit}.ad-workspace-tools>.ad-button{min-height:30px;padding:5px 10px;font-size:10px!important}.ad-workspace-tools>span{font-size:10px;color:var(--ad-muted)}
[data-theme=dark] .ad-heading h1 span{color:#a6c0a6}[data-theme=dark] .ad-review-card p:not(.ad-eyebrow){color:#becbb6}[data-theme=dark] .ad-tags{color:#b9b99e}[data-theme=dark] .ad-mini-plot span{color:#adbb9e}[data-theme=dark] .ad-slider-label strong{color:#b6cdb0}