/* Hash Tables revision: solid surfaces only, platform tokens from styles.css.
   Semantic accents: purple = action/selection, blue = time, green = correct/positive,
   amber = caution/trap, rose = gap/incorrect. */
.adaptive-shell{--ink:#1e293b;--mut:#64748b;--purple:#4f46e5;--purple-dark:#4338ca;--lavender:#eef2ff;--line:#e2e8f0;font-family:Inter,Arial,sans-serif;--a-blue-bg:#eef4fc;--a-blue:#2f5f9e;--a-green-bg:#edf7f2;--a-green-line:#bfe0d2;--a-amber-bg:#fdf6e7;--a-amber-line:#ead59f;--a-amber:#7a5a1c;--a-rose-bg:#fcf0f2;--a-rose-line:#e7aeb8;--a-rose:#a2495b;--a-surface:#f8f9fc;
  max-width:760px;margin:0 auto;padding:32px 24px 64px;color:var(--ink);display:grid;gap:24px;background:#fff}
.adaptive-shell>*{min-width:0}
.adaptive-shell h1,.adaptive-shell h2,.adaptive-shell h3{font-weight:600}.adaptive-shell button{font-weight:500}.adaptive-shell .secondary,.adaptive-shell .primary,.adaptive-shell .text-btn{border-radius:8px;font-weight:500}.adaptive-panel,.adaptive-question{border-radius:12px}
.adaptive-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding-bottom:16px;border-bottom:1px solid var(--line)}
.adaptive-back{gap:6px;padding:8px 0;color:var(--mut)}
.adaptive-back:hover{color:var(--purple)}
.adaptive-back-short{display:none}
.adaptive-timer{display:inline-flex;align-items:center;gap:6px;margin-left:auto;background:var(--a-blue-bg);color:var(--a-blue);padding:8px 13px;border-radius:8px;font-size:14px;font-weight:600;font-variant-numeric:tabular-nums;white-space:nowrap}
.adaptive-timer svg{flex-shrink:0}
.adaptive-top .secondary{padding:8px 14px;min-height:40px}
.adaptive-top .text-btn{padding:8px 4px;color:var(--mut);min-height:40px}
.adaptive-shell .primary{background:var(--purple);background-image:none;box-shadow:none;min-height:44px}
.adaptive-shell .primary:hover:not(:disabled){background:var(--purple-dark)}
.adaptive-shell .secondary,.adaptive-shell .text-btn{min-height:44px}
.adaptive-shell button{transition:background-color .15s,border-color .15s,color .15s}
.adaptive-heading .eyebrow{display:block;font-size:12px;letter-spacing:.8px;text-transform:uppercase;margin-bottom:8px}
.adaptive-heading h1{font-size:clamp(24px,4vw,30px);line-height:1.25;letter-spacing:-.6px;margin-bottom:8px;text-wrap:balance}
.adaptive-heading p{color:var(--mut);font-size:15px;line-height:1.65;max-width:60ch}
.adaptive-panel,.adaptive-question,.adaptive-summary article{border:1px solid var(--line);border-radius:14px;background:#fff;padding:24px;box-shadow:none}
.adaptive-panel>*+*,.adaptive-question>*+*{margin-top:14px}
.adaptive-panel h2,.adaptive-question h2{font-size:18px;line-height:1.4;letter-spacing:-.3px;margin:0;overflow-wrap:anywhere}
.adaptive-question h2{font-size:20px;line-height:1.5}
.adaptive-panel>p,.adaptive-question>p{color:var(--mut);font-size:14px;line-height:1.65;overflow-wrap:anywhere}
.adaptive-options,.adaptive-answers{display:grid;gap:10px}
.adaptive-options{grid-template-columns:repeat(auto-fit,minmax(130px,1fr))}
.adaptive-options button,.adaptive-answers button,.adaptive-time-options button{text-align:left;min-height:48px;padding:12px 16px;border:1px solid var(--line);border-radius:10px;background:#fff;line-height:1.55;font-size:14px;overflow-wrap:anywhere;color:var(--ink)}
.adaptive-options button{text-align:center;font-weight:600}
.adaptive-options button:hover:not(:disabled),.adaptive-answers button:hover:not(:disabled),.adaptive-time-options button:hover:not(:disabled){border-color:var(--purple);background:var(--a-surface)}
.adaptive-options button.selected,.adaptive-answers button.selected,.adaptive-time-options button.selected{border-color:var(--purple);background:var(--lavender);color:var(--purple);font-weight:650}
.adaptive-answers button[data-status=correct]{background:var(--a-green-bg);border-color:var(--a-green-line);color:#1f6a50}
.adaptive-answers button[data-status=incorrect]{background:var(--a-rose-bg);border-color:var(--a-rose-line);color:var(--a-rose)}
.adaptive-answers button[data-status=uncertain],.adaptive-options button[data-status=uncertain]{background:var(--a-amber-bg);border-color:var(--a-amber-line);color:var(--a-amber)}
.adaptive-concepts{display:grid;gap:10px}
.adaptive-concepts label{display:grid;grid-template-columns:22px minmax(0,1fr) auto;gap:14px;align-items:start;padding:16px;border:1px solid var(--line);border-radius:12px;background:#fff;cursor:pointer;transition:border-color .15s,background-color .15s}
.adaptive-concepts label:hover{border-color:#b9afe8}
.adaptive-concepts label:has(input:checked),.adaptive-concepts label.selected{border-color:var(--purple);background:var(--lavender)}
.adaptive-concepts label:has(input:focus-visible){outline:3px solid #a49ae8;outline-offset:2px}
.adaptive-concepts input{appearance:none;-webkit-appearance:none;grid-column:1;grid-row:1;width:22px;height:22px;margin:2px 0 0;border:1.5px solid #a5adbc;border-radius:50%;background:#fff;background-position:center;background-repeat:no-repeat;background-size:14px;cursor:pointer}
.adaptive-concepts input:checked{border-color:var(--purple);background-color:var(--purple);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='m3 8 3 3 7-7' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}
.adaptive-concept-copy{display:grid;gap:4px;grid-column:2;grid-row:1;min-width:0}
.adaptive-concepts strong{display:block;font-size:15px;font-weight:650;line-height:1.5;overflow-wrap:anywhere}
.adaptive-concepts small{display:block;color:var(--mut);font-size:13px;line-height:1.55;overflow-wrap:anywhere}
.adaptive-concept-time{grid-column:3;grid-row:1;white-space:nowrap;font-size:12px;font-weight:600;line-height:1.5;padding:4px 9px;border-radius:6px;background:var(--a-blue-bg);color:var(--a-blue);font-variant-numeric:tabular-nums}
.adaptive-confidence{display:flex;align-items:center;gap:10px;flex-wrap:wrap;color:var(--mut);font-size:14px}
.adaptive-confidence select{border:1px solid var(--line);border-radius:8px;background:#fff;padding:10px 12px;min-width:200px;max-width:100%;min-height:44px}
.adaptive-feedback{padding:16px 18px;border-radius:12px;background:var(--a-green-bg);border:1px solid var(--a-green-line);color:#1f6a50;line-height:1.65;font-size:14px}
.adaptive-feedback strong{display:block;color:var(--ink);margin-bottom:4px}
.adaptive-feedback p{margin:0}
.adaptive-feedback.error{background:var(--a-rose-bg);border-color:var(--a-rose-line);color:var(--a-rose)}
.adaptive-panel>.adaptive-feedback{background:var(--a-amber-bg);border-color:var(--a-amber-line);color:var(--a-amber)}
.adaptive-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center;justify-content:flex-end}
.adaptive-action-hint{margin-right:auto;font-size:13px;color:var(--mut)}
.adaptive-progress{display:grid;grid-template-columns:auto 1fr;align-items:center;gap:12px;font-size:13px;color:var(--mut);font-variant-numeric:tabular-nums}
.adaptive-progress progress{appearance:none;-webkit-appearance:none;width:100%;height:6px;border:0;border-radius:6px;background:#e6e9f1;overflow:hidden}
.adaptive-progress progress::-webkit-progress-bar{background:#e6e9f1;border-radius:6px}
.adaptive-progress progress::-webkit-progress-value{background:var(--purple);border-radius:6px;transition:width .25s}
.adaptive-progress progress::-moz-progress-bar{background:var(--purple);border-radius:6px}
.adaptive-lesson{display:grid;gap:18px}
.adaptive-lesson>*{margin:0!important}
.adaptive-brief{font-size:16px;line-height:1.75;color:var(--ink)}
.adaptive-section-label{font-size:12px!important;font-weight:700;letter-spacing:.8px;text-transform:uppercase;color:var(--purple);margin:0 0 8px!important}
.adaptive-example pre{margin:0;padding:16px 18px;background:var(--a-surface);color:#2a3350;border:1px solid var(--line);border-radius:12px;overflow-x:auto;max-width:100%;font:13px/1.7 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;tab-size:2}
.adaptive-example code{font:inherit;white-space:pre}
.adaptive-trap{padding:12px 16px;border-left:3px solid #d9ae4f;background:var(--a-amber-bg);border-radius:0 10px 10px 0;color:var(--a-amber);font-size:14px;line-height:1.65}
.adaptive-trap strong{display:block;font-size:12px;letter-spacing:.7px;text-transform:uppercase;margin-bottom:2px}
.adaptive-chip{display:inline-flex;align-items:center;padding:3px 10px;border-radius:99px;background:var(--lavender);color:var(--purple-dark);font-size:12px;font-weight:650;margin-bottom:10px}
.adaptive-tools{display:flex;flex-wrap:wrap;align-items:center;gap:0 18px;padding-top:16px;border-top:1px solid var(--line)}
.adaptive-tools-label{font-size:12px;font-weight:700;letter-spacing:.7px;text-transform:uppercase;color:var(--mut)}
.adaptive-tools .text-btn{font-size:13px}
.adaptive-tools small{flex-basis:100%;color:var(--mut);font-size:12px}
/* Study: action bar stays reachable but takes its own space, never covers content. */
.adaptive-study>.adaptive-actions,.adaptive-study>.adaptive-question>.adaptive-actions{position:sticky;bottom:12px;z-index:5;padding:12px 16px;border:1px solid var(--line);border-radius:12px;background:#fff}
.adaptive-study>.adaptive-question>.adaptive-actions{position:static;border:0;padding:0}
.adaptive-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.adaptive-stats>*{padding:14px 16px;border-radius:12px;font-size:14px;font-weight:600}
.adaptive-stats>:first-child{background:var(--a-green-bg);color:#1f6a50}
.adaptive-stats>:last-child{background:var(--a-blue-bg);color:var(--a-blue)}
.adaptive-summary{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.adaptive-summary article{padding:20px;border-top:3px solid var(--line)}
.adaptive-summary article[data-tone=demonstrated]{border-top-color:#5bb394}
.adaptive-summary article[data-tone=addressed]{border-top-color:#6f9fd6}
.adaptive-summary article[data-tone=practice]{border-top-color:#d98a99}
.adaptive-summary article[data-tone=initial]{border-top-color:#d9ae4f}
.adaptive-summary article[data-tone=unchecked]{border-top-color:#b4bac8}
.adaptive-summary h3{font-size:15px;margin-bottom:10px}
.adaptive-summary ul{margin:0;padding-left:18px;color:var(--mut);line-height:1.7}
.adaptive-summary li+li{margin-top:8px}
.adaptive-summary li small{display:block;font-size:13px}
.adaptive-summary article>p{color:var(--mut);font-size:13px}
.adaptive-coverage{border:1px solid var(--line);border-radius:12px;padding:6px 18px;background:var(--a-surface)}
.adaptive-coverage>summary{cursor:pointer;font-weight:600;color:var(--purple);padding:12px 0;min-height:44px}
.adaptive-coverage>p{color:var(--mut);font-size:13px;margin-bottom:8px}
.adaptive-coverage details{border-top:1px solid var(--line);padding:4px 0}
.adaptive-coverage details>summary{cursor:pointer;font-weight:600;padding:10px 0;min-height:44px}
.adaptive-coverage details>p{font-size:14px;line-height:1.65;color:var(--mut);margin:0 0 10px}
.adaptive-coverage details .adaptive-example{margin:0 0 12px}
.adaptive-coverage details .adaptive-example pre{background:#fff}
/* Setup: one flow, numbered steps, no nested boxes. */
.adaptive-setup{gap:28px}
.adaptive-setup .adaptive-heading h1{font-size:clamp(22px,3.5vw,26px);margin-bottom:4px}
.adaptive-setup .adaptive-heading p{font-size:15px}
.adaptive-resume{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:16px 18px;border-radius:12px;background:var(--a-green-bg);border:1px solid var(--a-green-line)}
.adaptive-resume div{display:grid;gap:2px}
.adaptive-resume strong{font-weight:600}
.adaptive-resume span{font-size:13px;color:#1f6a50}
.adaptive-step{display:grid;gap:20px}
.adaptive-step+.adaptive-step{padding-top:28px;border-top:1px solid var(--line)}
.adaptive-step h2{display:flex;align-items:center;gap:10px;font-size:17px;line-height:1.4}
.adaptive-step-no{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--a-blue-bg);color:var(--a-blue);font-size:13px;font-weight:600}
.adaptive-hint{font-size:13px;color:var(--mut);line-height:1.6}
.adaptive-step>h2,.adaptive-step>.adaptive-options,.adaptive-step>.adaptive-hint{margin:0}
.adaptive-panel:has(>.adaptive-options){display:grid;gap:20px}
.adaptive-panel:has(>.adaptive-options)>h2,.adaptive-panel:has(>.adaptive-options)>.adaptive-options,.adaptive-panel:has(>.adaptive-options)>p{margin:0}
.adaptive-hint-blue{padding:10px 12px;border-radius:8px;background:var(--a-blue-bg);color:var(--a-blue)}
.adaptive-paths{display:grid;gap:12px}
.adaptive-path{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:#fff}
.adaptive-path>div{display:grid;gap:3px;min-width:0}
.adaptive-path strong{font-weight:600;font-size:15px}
.adaptive-path span{font-size:13px;color:var(--mut);line-height:1.55}
.adaptive-path-main{background:var(--lavender);border-color:#c7d2fe}
.adaptive-path>button{flex-shrink:0;max-width:46%;text-align:center}
@media(max-width:600px){
.adaptive-path{flex-direction:column;align-items:stretch}.adaptive-path>button{max-width:none;width:100%}
.adaptive-resume{flex-direction:column;align-items:stretch}.adaptive-resume button{width:100%}
}
@media(max-width:600px){
.adaptive-shell{padding:18px 16px 48px;gap:20px}
.adaptive-panel,.adaptive-question,.adaptive-summary article{padding:18px 16px}
.adaptive-options{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.adaptive-options button{padding:12px 8px}
.adaptive-back-long{display:none}.adaptive-back-short{display:inline}
.adaptive-top{display:grid;grid-template-columns:auto minmax(0,1fr) auto auto;gap:6px}
.adaptive-top>.adaptive-timer{margin-left:0;justify-self:end;font-size:12px;padding:8px}
.adaptive-time-caption{display:none}
.adaptive-top>button{font-size:12px}
.adaptive-top>.secondary{padding:8px 10px}
.adaptive-top>.adaptive-back{padding:8px 0}
.adaptive-top>button[data-hash-action="finish"]{margin-left:0;padding:8px 4px}
.adaptive-actions{flex-direction:column-reverse;align-items:stretch}.adaptive-actions>*{width:100%}
.adaptive-action-hint{display:none}
.adaptive-confidence select{width:100%}
.adaptive-study>.adaptive-actions{padding:10px;bottom:8px}
.adaptive-study>.adaptive-actions{flex-direction:row;gap:8px}
.adaptive-study>.adaptive-actions>*{width:auto}
.adaptive-study>.adaptive-actions>.primary{flex:1;min-width:0;padding:12px 10px;font-size:13px}
.adaptive-study>.adaptive-actions>.text-btn{font-size:12px;padding:8px 4px}
.adaptive-brief{font-size:15px}
.adaptive-example pre{font-size:12px;padding:14px}
.adaptive-concepts label{grid-template-columns:22px minmax(0,1fr);gap:6px 12px;padding:14px 12px}
.adaptive-concepts input{grid-row:1/span 2}
.adaptive-concept-time{grid-column:2;grid-row:2;justify-self:start}
}
@media(prefers-reduced-motion:reduce){.adaptive-shell *{animation:none!important;transition:none!important}}
@media(forced-colors:active){.adaptive-concepts input{appearance:auto;-webkit-appearance:auto}.adaptive-options button.selected,.adaptive-answers button.selected,.adaptive-time-options button.selected{outline:2px solid Highlight}}