:root{--bg:#f6f7f9;--panel:#fff;--text:#17202a;--muted:#667085;--line:#e4e7ec;--accent:#2457c5;--accent-soft:#eef4ff;--good:#067647;--good-bg:#ecfdf3;--bad:#b42318;--bad-bg:#fff1f0;--radius:14px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55}.shell{width:min(1240px,calc(100% - 32px));margin:auto}.topbar{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.topbar-inner{min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{font-weight:850;color:var(--text);text-decoration:none}.desktop-nav{display:flex;gap:24px;align-items:center}.desktop-nav a{color:#344054;text-decoration:none;font-weight:650}.desktop-nav a.active{color:var(--accent)}.mobile-nav{display:none;position:relative}.mobile-nav summary{list-style:none;cursor:pointer;font-size:1.25rem;padding:8px}.mobile-nav summary::-webkit-details-marker{display:none}.mobile-nav>div{position:absolute;right:0;top:44px;min-width:180px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 14px 34px rgba(16,24,40,.12);padding:8px;display:flex;flex-direction:column}.mobile-nav a{padding:10px 12px;text-decoration:none;color:var(--text);font-weight:650;border-radius:8px}.mobile-nav a:hover{background:#f7f9fc}.hero{padding:46px 0 24px;max-width:850px}.hero h1,.page-head h1,.solver-head h1,.empty-state h1{line-height:1.12;margin:.2rem 0 .8rem;font-size:clamp(2rem,4vw,3.5rem);letter-spacing:-.035em}.hero p,.page-head p{color:var(--muted);font-size:1.06rem}.eyebrow{text-transform:uppercase;letter-spacing:.13em;font-size:.75rem!important;font-weight:800;color:var(--accent)!important}.hero-actions{display:flex;gap:10px;margin-top:22px;flex-wrap:wrap}.searchbox,.filterbar{display:flex;gap:10px;margin-top:24px}.searchbox input,.filterbar input,.filterbar select{min-width:0;flex:1;padding:13px 15px;border:1px solid #cfd4dc;border-radius:10px;background:white;font:inherit}.searchbox button,.filterbar button,.button-link,.check-button{border:0;background:var(--accent);color:#fff;padding:12px 18px;border-radius:10px;font-weight:700;text-decoration:none;cursor:pointer}.button-secondary{display:inline-block;border:1px solid #cfd4dc;background:#fff;color:#344054;padding:11px 17px;border-radius:10px;font-weight:700;text-decoration:none}.button-secondary.compact{padding:9px 13px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:10px 0 36px}.stats>div{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px}.stats strong{display:block;font-size:1.7rem}.stats span{color:var(--muted);font-size:.9rem}h2{margin:36px 0 16px}.subject-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.subject-tile{display:flex;flex-direction:column;gap:4px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;text-decoration:none;color:var(--text)}.subject-tile:hover,.question-row:hover,.topic-row:hover,.search-results a:hover{border-color:#b9c5db}.subject-tile small{color:var(--muted)}.code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--accent);font-weight:800}.code.large{font-size:1.05em}.pathways{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:38px 0}.pathways>div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}.pathways p{color:var(--muted)}.pathways a{color:var(--accent);font-weight:700;text-decoration:none}.pathways .coming{opacity:.7}.pathways .coming span{font-size:.82rem;color:var(--muted)}.crumbs{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px;font-size:.9rem;color:var(--muted)}.crumbs a{color:var(--accent);text-decoration:none}.page-head{padding:34px 0 18px;max-width:900px}.filterbar{margin:0 0 20px}.question-list{display:flex;flex-direction:column;gap:10px}.question-row{display:flex;justify-content:space-between;gap:22px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:12px;padding:17px 18px;text-decoration:none;color:var(--text)}.question-row p{margin:.4rem 0 0;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.question-meta{display:flex;gap:8px;flex-wrap:wrap;color:var(--muted);font-size:.82rem;margin-bottom:5px}.question-meta span{background:#f2f4f7;border-radius:999px;padding:3px 8px}.solve-arrow{white-space:nowrap;color:var(--accent);font-weight:800}.empty-state{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:40px;text-align:center;margin:30px 0}.empty-state.large{margin-top:60px}.empty-state p{color:var(--muted)}.browse-layout{display:grid;grid-template-columns:252px minmax(0,1fr);gap:26px;align-items:start}.browse-main{min-width:0}.context-sidebar{position:sticky;top:84px;max-height:calc(100vh - 105px);overflow:auto;background:#fff;border:1px solid var(--line);border-radius:14px;margin-top:26px;padding:8px}.context-title{padding:10px 11px;font-size:.76rem;text-transform:uppercase;letter-spacing:.08em;color:#667085;font-weight:800}.context-sidebar nav,.context-sidebar details>div{display:flex;flex-direction:column}.context-sidebar a{display:flex;flex-direction:column;gap:2px;padding:9px 10px;border-radius:8px;text-decoration:none;color:#344054}.context-sidebar a:hover,.context-sidebar a.current{background:var(--accent-soft);color:#193d86}.context-sidebar a>small{color:var(--muted);font-size:.76rem;line-height:1.35;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.context-sidebar details{border-top:1px solid #eef0f2}.context-sidebar details:first-of-type{border-top:0}.context-sidebar summary{cursor:pointer;padding:9px 10px;font-weight:750;color:#344054}.cbme-sidebar a{display:grid;grid-template-columns:38px 1fr;align-items:start;gap:6px}.cbme-sidebar a span:last-child{font-size:.82rem}.solver-single{max-width:980px;margin:auto}.solver-layout{grid-template-columns:220px minmax(0,1fr)}.case-sidebar .case-progress{margin:2px 10px 10px;color:var(--muted);font-size:.85rem}.case-nav-list{list-style:none;margin:0;padding:0}.case-nav-list li a{display:grid;grid-template-columns:32px 1fr;gap:8px;align-items:center}.case-nav-list li.current a{background:var(--accent-soft)}.case-nav-list li span{font-weight:800;color:var(--accent)}.solver-head{display:flex;justify-content:space-between;gap:20px;align-items:flex-end;padding:34px 0 18px}.solver-head h1{font-size:2rem}.solver-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:clamp(20px,4vw,40px);margin-bottom:30px}.stem{font-size:1.22rem;line-height:1.72;margin:0 0 24px}.answer-options{display:flex;flex-direction:column;gap:10px}.answer-option{display:grid;grid-template-columns:42px 1fr;align-items:center;gap:12px;border:1px solid #d5d9e0;border-radius:12px;padding:12px 14px;cursor:pointer}.answer-option:hover{background:#fafbfc}.answer-option input{position:absolute;opacity:0}.option-key{width:34px;height:34px;border-radius:50%;background:#f2f4f7;display:grid;place-items:center;font-weight:800}.answer-option:has(input:checked){border-color:var(--accent);background:var(--accent-soft)}.answer-option.correct{border-color:#75d6a3;background:var(--good-bg)}.answer-option.wrong{border-color:#f0a3a0;background:var(--bad-bg)}.check-button{margin-top:20px}.result-box{display:flex;justify-content:space-between;gap:15px;margin-top:22px;padding:14px 16px;border-radius:10px}.result-box.good{background:var(--good-bg);color:var(--good)}.result-box.bad{background:var(--bad-bg);color:var(--bad)}.explanation{margin-top:28px;border-top:1px solid var(--line);padding-top:26px}.explanation h2,.explanation h3{margin:20px 0 7px}.pearl{margin-top:20px;background:#fff8e8;border:1px solid #f1d8a4;border-radius:10px;padding:14px 16px}.pearl p{margin:.4rem 0 0}.support-links{margin-top:24px;border-top:1px solid var(--line);padding-top:18px}.support-links h3{margin:0 0 10px}.support-links>a,.support-links>div{display:flex;gap:12px;padding:10px 0;text-decoration:none;color:var(--text);border-bottom:1px solid #f1f2f4}.support-links>a:last-child,.support-links>div:last-child{border-bottom:0}.support-links>a span:last-child,.support-links>div span{color:var(--muted)}.solver-next{display:flex;gap:10px;margin-top:26px;flex-wrap:wrap}.preview-banner{margin-top:20px;background:#fff7e8;border:1px solid #f2d89d;color:#6b5a32;border-radius:10px;padding:11px 14px;display:flex;gap:10px;align-items:center}.phase-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.card-head{padding:20px;display:flex;justify-content:space-between;align-items:flex-start;border-bottom:1px solid var(--line)}.card-head h3{margin:3px 0 0}.card-head>span{color:var(--muted);font-size:.85rem}.subject-list a{display:flex;justify-content:space-between;gap:16px;padding:14px 20px;text-decoration:none;color:var(--text);border-bottom:1px solid #f0f1f3}.subject-list a:last-child{border-bottom:0}.subject-list small{color:var(--muted);text-align:right}.topic-list,.competency-list,.search-results{display:flex;flex-direction:column;gap:10px}.topic-row{display:grid;grid-template-columns:120px 1fr auto;gap:18px;align-items:center;padding:16px 18px;background:white;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--text)}.topic-no{font-weight:800}.topic-meta{color:var(--muted);font-size:.88rem}.competency-card,.competency-detail,.future-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}.competency-top{display:flex;justify-content:space-between;gap:14px}.chips{display:flex;gap:6px;flex-wrap:wrap}.chips span{background:var(--accent-soft);color:#234b9b;border-radius:999px;padding:4px 9px;font-size:.78rem;font-weight:700}.competency-card p{font-size:1.03rem}.competency-card details{border-top:1px solid var(--line);padding-top:12px;color:var(--muted)}.competency-card summary{cursor:pointer;font-weight:700;color:#344054}.details-grid{display:grid;grid-template-columns:180px 1fr;gap:10px 18px}.details-grid dt{font-weight:750;color:#475467}.details-grid dd{margin:0}.competency-text{font-size:1.2rem;line-height:1.65}.future-panel{margin-top:16px}.future-panel>p{color:var(--muted)}.mini-question-list{margin-top:12px}.mini-question-list a{display:flex;justify-content:space-between;gap:16px;padding:10px 0;border-top:1px solid #eee;text-decoration:none;color:var(--text)}.mini-question-list b{color:var(--accent);white-space:nowrap}.search-results a{display:block;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--text)}.search-results a p{margin:.4rem 0 0}.search-results small{color:var(--muted)}.notice,.result-count{color:var(--muted)}.case-context{background:#fff;border:1px solid #dfe4eb;border-radius:16px;padding:22px;margin:14px 0 22px}.case-context.standalone{margin-top:18px}.case-context-head{display:flex;justify-content:space-between;gap:18px;align-items:flex-start;margin-bottom:12px}.case-context-head h2{margin:2px 0 0}.case-vignette{font-size:1.04rem;line-height:1.7;margin:0}.case-facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:18px}.case-facts>div{background:#f7f9fc;border-radius:12px;padding:15px}.case-facts strong{display:block;margin-bottom:8px}.case-facts ul{margin:0;padding-left:20px;line-height:1.6}.question-media{margin:0 0 24px}.question-media figure{margin:0}.question-media img{display:block;max-width:100%;max-height:620px;margin:auto;border-radius:14px;border:1px solid #dfe4eb;background:#fff}.question-media figcaption{text-align:center;color:#64748b;font-size:.9rem;margin-top:10px}.media-fallback{min-height:160px;display:grid;place-items:center;text-align:center;padding:18px;border:1px dashed #cbd5e1;background:#f8fafc;border-radius:12px;color:#64748b}.case-page-head{padding:26px 0 4px}.case-page-head h1{font-size:clamp(2rem,5vw,3.2rem);margin:.15rem 0 .7rem}.case-question-list{margin:24px 0 60px}.case-question-list h2{margin-bottom:14px}.case-question-list>a{display:grid;grid-template-columns:44px 1fr auto;align-items:center;gap:15px;padding:17px 18px;background:#fff;border:1px solid #dfe4eb;border-radius:14px;margin-bottom:10px;text-decoration:none;color:inherit}.case-question-list>a:hover{border-color:#9fb6e6}.case-question-list a div{display:grid;gap:4px}.case-question-list a div span{color:#64748b}.case-number{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:#eef3ff;font-weight:800;color:#2357c7}.case-browser{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:16px;margin:22px 0 60px}.case-browser>a{display:block;background:#fff;border:1px solid #dfe4eb;border-radius:16px;padding:20px;text-decoration:none;color:inherit}.case-browser>a:hover{border-color:#9fb6e6}.case-browser strong{display:block;font-size:1.18rem;margin:9px 0}.case-browser p{color:#64748b;line-height:1.55;margin:0 0 14px}.case-browser>a>span:last-child{font-weight:800;color:#2357c7}.footer{padding:40px 0 55px;color:var(--muted);font-size:.85rem}@media(max-width:980px){.browse-layout,.solver-layout{grid-template-columns:210px minmax(0,1fr)}.subject-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:820px){.desktop-nav{display:none}.mobile-nav{display:block}.browse-layout,.solver-layout{grid-template-columns:1fr}.context-sidebar{position:static;max-height:280px;margin-top:20px}.subject-grid,.pathways{grid-template-columns:repeat(2,1fr)}.phase-grid{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr)}.solver-head{align-items:flex-start;flex-direction:column}.filterbar{flex-direction:column}.question-row{align-items:flex-start}.topic-row{grid-template-columns:1fr}.details-grid{grid-template-columns:1fr}.subject-list a{flex-direction:column}.subject-list small{text-align:left}.case-facts{grid-template-columns:1fr}.case-context-head{display:block}}@media(max-width:540px){.subject-grid,.pathways{grid-template-columns:1fr}.stats{grid-template-columns:1fr 1fr}.solver-card{padding:18px}.answer-option{grid-template-columns:38px 1fr}.result-box{flex-direction:column}.case-question-list>a{grid-template-columns:38px 1fr}.case-question-list>a>span:last-child{display:none}.preview-banner{display:block}.case-browser{grid-template-columns:1fr}}
.section-sidebar .tree-link{padding-left:calc(10px + (var(--depth) * 16px));border-left:2px solid transparent}.section-sidebar .tree-link.current{border-left-color:var(--accent)}.section-card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px;margin:18px 0 28px}.section-card{display:flex;justify-content:space-between;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;text-decoration:none;color:var(--text)}.section-card:hover{border-color:#9fb6e6}.section-card div{display:flex;flex-direction:column;gap:4px}.section-card div>span{font-size:.76rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}.section-card strong{font-size:1.08rem}.section-card>b,.section-card>span{color:var(--accent);font-size:.85rem}.section-card-grid.compact{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.unsectioned-block{margin-top:32px}.pyq-sidebar .tree-link{padding-left:calc(10px + (var(--depth) * 16px))}.pyq-sidebar details>div>a{margin-left:0}.pyq-sidebar .pyq-subject{font-size:.84rem}@media(max-width:820px){.section-card-grid{grid-template-columns:1fr}}

/* v18 Search Your Mind / Ask Your Mind */
.mind-head{max-width:900px}.mind-mode-switch{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:4px 0 14px}.mind-mode-switch a{display:flex;justify-content:space-between;gap:14px;align-items:center;text-decoration:none;color:#344054;background:#fff;border:1px solid var(--line);border-radius:12px;padding:15px 17px;font-weight:800}.mind-mode-switch a.active{border-color:var(--accent);background:var(--accent-soft);color:#193d86}.mind-mode-switch span{font-size:.82rem;color:var(--muted);font-weight:600}.mind-search{display:flex;gap:10px;margin:0 0 18px}.mind-search input{flex:1;min-width:0;padding:14px 16px;border:1px solid #cfd4dc;border-radius:11px;background:#fff;font:inherit}.mind-search button{border:0;background:var(--accent);color:#fff;border-radius:10px;padding:12px 18px;font-weight:800;cursor:pointer}.mind-intro{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin:12px 0 20px}.mind-intro p{margin:.35rem 0 0;color:var(--muted)}.mind-results{display:flex;flex-direction:column;gap:12px;margin:18px 0 55px}.mind-card{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:15px;padding:21px;text-decoration:none;color:var(--text)}.mind-card:hover{border-color:#9fb6e6}.mind-card h2{margin:4px 0 4px}.mind-card p{margin:.35rem 0;color:var(--muted)}.mind-card .eyebrow{margin:0}.mind-secondary{color:#475467!important}.mind-secondary.large{font-size:1.15rem!important}.mind-card-meta{display:flex;min-width:170px;flex-direction:column;align-items:flex-end;gap:5px;color:var(--muted);font-size:.8rem}.mind-card-meta b{margin-top:6px;color:var(--accent);font-size:.9rem}.idea-public-assets{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px;margin:8px 0 20px}.idea-public-assets figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px}.idea-public-assets img{display:block;width:100%;max-height:520px;object-fit:contain;border-radius:10px}.idea-public-assets figcaption{color:var(--muted);font-size:.86rem;margin-top:8px}.mind-formula{display:flex;gap:16px;align-items:center;justify-content:space-between;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin:4px 0 18px}.mind-formula span{color:var(--muted);font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;font-weight:800}.mind-formula strong{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--accent);text-align:right}.mind-detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:14px 0}.mind-panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:19px}.mind-panel.standalone{margin:5px 0 25px}.mind-panel h2{margin:0 0 13px;font-size:1.12rem}.hint-cloud{display:flex;gap:8px;flex-wrap:wrap}.hint-cloud span{background:#f2f4f7;border-radius:999px;padding:7px 10px;color:#344054;font-size:.86rem}.mental-public-list{display:flex;flex-direction:column}.mental-public-list a{display:grid;grid-template-columns:30px minmax(0,1fr);gap:9px;align-items:start;text-decoration:none;color:var(--text);padding:10px 0;border-top:1px solid #eef0f2}.mental-public-list a:first-child{border-top:0}.mental-public-list strong{display:block}.mental-public-list small{display:block;color:var(--muted);margin-top:2px}.mental-direction{color:var(--accent);font-size:1.15rem;font-weight:900}.mind-section{margin:34px 0}.mind-section>h2{margin:4px 0 15px}.mind-section.minor{padding-top:18px;border-top:1px solid var(--line)}.inquiry-route-list,.concept-public-list{display:flex;flex-direction:column;gap:9px}.inquiry-route-list a,.concept-public-list a,.concept-public-list>div{display:flex;justify-content:space-between;gap:16px;align-items:center;padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:11px;text-decoration:none;color:var(--text)}.inquiry-route-list a:hover,.concept-public-list a:hover{border-color:#9fb6e6}.inquiry-route-list span,.concept-public-list span{color:var(--accent);font-weight:750;font-size:.84rem}.idea-route-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:11px}.idea-route-grid a{display:flex;flex-direction:column;gap:5px;padding:17px;background:#fff;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--text)}.idea-route-grid a:hover{border-color:#9fb6e6}.idea-route-grid>a>span{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--accent);font-weight:800}.idea-route-grid code{color:var(--accent);font-size:.82rem}.idea-route-grid p{color:var(--muted);margin:2px 0}.mind-after-solve{border-top:1px solid var(--line);margin-top:26px;padding-top:22px}.mind-after-solve h3{margin:3px 0 12px}.mind-after-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:9px}.mind-after-grid a{display:flex;flex-direction:column;gap:3px;padding:13px 14px;border:1px solid var(--line);border-radius:10px;text-decoration:none;color:var(--text);background:#fbfcff}.mind-after-grid a:hover{border-color:#9fb6e6}.mind-after-grid a>span{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--accent);font-weight:800}.mind-after-grid small{color:var(--muted)}
@media(max-width:820px){.mind-detail-grid{grid-template-columns:1fr}.mind-card{grid-template-columns:1fr}.mind-card-meta{align-items:flex-start;min-width:0}.mind-mode-switch{grid-template-columns:1fr}}
@media(max-width:540px){.mind-search{flex-direction:column}.mind-formula{align-items:flex-start;flex-direction:column}.mind-formula strong{text-align:left}.inquiry-route-list a,.concept-public-list a{align-items:flex-start;flex-direction:column}}

/* v21 public colour refresh */
:root{
  --bg:#f7f8fc;
  --panel:#ffffff;
  --text:#182230;
  --muted:#667085;
  --line:#e3e8ef;
  --accent:#3659d9;
  --accent-strong:#2947b8;
  --accent-2:#7c3aed;
  --teal:#0f8f83;
  --amber:#c96b08;
  --rose:#d94f78;
  --accent-soft:#eef2ff;
  --violet-soft:#f5f1ff;
  --teal-soft:#eaf9f7;
  --amber-soft:#fff7e8;
  --rose-soft:#fff0f5;
  --good:#067647;
  --good-bg:#ecfdf3;
  --bad:#b42318;
  --bad-bg:#fff1f0;
  --radius:14px;
  --soft-shadow:0 10px 28px rgba(37,52,94,.07);
}
body{
  background:
    radial-gradient(circle at 8% 0%,rgba(54,89,217,.07),transparent 26rem),
    radial-gradient(circle at 92% 18%,rgba(124,58,237,.055),transparent 24rem),
    var(--bg);
}
.topbar{
  background:rgba(255,255,255,.92);
  border-bottom-color:#dfe5ef;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:0 1px 0 rgba(20,32,58,.02);
}
.brand{display:inline-flex;align-items:center;gap:10px;letter-spacing:-.015em}
.brand::before{
  content:"";
  width:22px;height:22px;border-radius:7px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2) 58%,var(--teal));
  box-shadow:0 5px 14px rgba(54,89,217,.22);
}
.desktop-nav{gap:8px}
.desktop-nav a{padding:8px 11px;border-radius:9px;transition:background .18s ease,color .18s ease,transform .18s ease}
.desktop-nav a:hover{background:#f3f5fa;color:#253858}
.desktop-nav a.active{color:var(--accent-strong);background:var(--accent-soft)}
.mobile-nav>div{box-shadow:0 18px 40px rgba(24,34,48,.14)}
.mobile-nav a:hover{background:var(--accent-soft);color:var(--accent-strong)}

.question-hero{
  position:relative;
  isolation:isolate;
  max-width:none;
  margin-top:28px;
  padding:42px clamp(24px,5vw,56px) 34px;
  border:1px solid #dfe5f4;
  border-radius:24px;
  overflow:hidden;
  background:linear-gradient(135deg,rgba(255,255,255,.96),rgba(244,247,255,.96) 55%,rgba(248,244,255,.94));
  box-shadow:var(--soft-shadow);
}
.question-hero::after{
  content:"";
  position:absolute;
  z-index:-1;
  width:280px;height:280px;border-radius:50%;
  right:-85px;top:-115px;
  background:linear-gradient(135deg,rgba(54,89,217,.18),rgba(124,58,237,.12),rgba(15,143,131,.13));
  filter:blur(3px);
}
.question-hero h1{max-width:760px}
.question-hero>p:not(.eyebrow){max-width:760px}
.button-link,.check-button,.searchbox button,.filterbar button,.mind-search button{
  background:linear-gradient(135deg,var(--accent),#4c63df 56%,var(--accent-2));
  box-shadow:0 7px 18px rgba(54,89,217,.17);
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease;
}
.button-link:hover,.check-button:hover,.searchbox button:hover,.filterbar button:hover,.mind-search button:hover{
  transform:translateY(-1px);
  box-shadow:0 10px 22px rgba(54,89,217,.23);
  filter:saturate(1.04);
}
.button-secondary{box-shadow:0 3px 10px rgba(24,34,48,.035)}
.button-secondary:hover{border-color:#aebbd2;background:#fbfcff}

.stats>div{
  position:relative;
  overflow:hidden;
  box-shadow:0 6px 18px rgba(24,34,48,.035);
}
.stats>div::before{content:"";position:absolute;left:0;top:0;width:100%;height:3px;background:var(--stat-accent,var(--accent))}
.stats>div:nth-child(1){--stat-accent:var(--accent)}
.stats>div:nth-child(2){--stat-accent:var(--teal)}
.stats>div:nth-child(3){--stat-accent:var(--accent-2)}
.stats>div:nth-child(4){--stat-accent:var(--amber)}
.stats>div:nth-child(1) strong{color:var(--accent-strong)}
.stats>div:nth-child(2) strong{color:var(--teal)}
.stats>div:nth-child(3) strong{color:var(--accent-2)}
.stats>div:nth-child(4) strong{color:var(--amber)}

.subject-tile{
  --tile-accent:var(--accent);
  --tile-soft:var(--accent-soft);
  position:relative;
  overflow:hidden;
  box-shadow:0 5px 16px rgba(24,34,48,.035);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.subject-tile::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--tile-accent)}
.subject-tile:nth-child(5n+1){--tile-accent:var(--accent);--tile-soft:var(--accent-soft)}
.subject-tile:nth-child(5n+2){--tile-accent:var(--teal);--tile-soft:var(--teal-soft)}
.subject-tile:nth-child(5n+3){--tile-accent:var(--accent-2);--tile-soft:var(--violet-soft)}
.subject-tile:nth-child(5n+4){--tile-accent:var(--amber);--tile-soft:var(--amber-soft)}
.subject-tile:nth-child(5n){--tile-accent:var(--rose);--tile-soft:var(--rose-soft)}
.subject-tile .code{color:var(--tile-accent)}
.subject-tile:hover{transform:translateY(-2px);border-color:#b8c3d8;box-shadow:0 10px 24px rgba(24,34,48,.075);background:linear-gradient(135deg,#fff,var(--tile-soft))}

.pathways>div{
  position:relative;
  overflow:hidden;
  box-shadow:0 7px 20px rgba(24,34,48,.04);
  transition:transform .18s ease,box-shadow .18s ease;
}
.pathways>div:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(24,34,48,.075)}
.pathway-card::before{content:"";display:block;width:38px;height:5px;border-radius:999px;margin-bottom:14px;background:var(--path-accent)}
.pathway-card.curriculum{--path-accent:var(--accent);background:linear-gradient(145deg,#fff 55%,var(--accent-soft))}
.pathway-card.ideas{--path-accent:var(--accent-2);background:linear-gradient(145deg,#fff 55%,var(--violet-soft))}
.pathway-card.inquiries{--path-accent:var(--teal);background:linear-gradient(145deg,#fff 55%,var(--teal-soft))}
.pathway-card.curriculum a{color:var(--accent)}
.pathway-card.ideas a{color:var(--accent-2)}
.pathway-card.inquiries a{color:var(--teal)}

.card,.question-row,.topic-row,.competency-card,.competency-detail,.future-panel,.solver-card,.case-browser>a,.case-question-list>a,.section-card{
  box-shadow:0 5px 18px rgba(24,34,48,.032);
}
.question-row,.topic-row,.section-card,.case-browser>a,.case-question-list>a{transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease}
.question-row:hover,.topic-row:hover,.section-card:hover,.case-browser>a:hover,.case-question-list>a:hover{transform:translateY(-1px);box-shadow:0 9px 22px rgba(24,34,48,.065)}
.question-meta span:nth-child(4n+1){background:var(--accent-soft);color:#3150ab}
.question-meta span:nth-child(4n+2){background:var(--teal-soft);color:#146f68}
.question-meta span:nth-child(4n+3){background:var(--violet-soft);color:#6b35bc}
.question-meta span:nth-child(4n){background:var(--amber-soft);color:#9a5a0d}

.mind-head{position:relative}
.mind-mode-switch a{transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease}
.mind-mode-switch a:first-child.active{border-color:#b7c2ff;background:linear-gradient(135deg,var(--accent-soft),var(--violet-soft));color:var(--accent-strong);box-shadow:0 7px 18px rgba(54,89,217,.075)}
.mind-mode-switch a:last-child.active{border-color:#a9ddd7;background:linear-gradient(135deg,var(--teal-soft),#f5fffd);color:#126e67;box-shadow:0 7px 18px rgba(15,143,131,.075)}
.mind-mode-switch a:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(24,34,48,.055)}
.mind-card{position:relative;overflow:hidden;box-shadow:0 6px 20px rgba(24,34,48,.04);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
.mind-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(var(--accent),var(--accent-2))}
.mind-card.inquiry::before{background:linear-gradient(var(--teal),#27b3a5)}
.mind-card:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(24,34,48,.075)}
.hint-cloud span:nth-child(4n+1){background:var(--accent-soft);color:#3150ab}
.hint-cloud span:nth-child(4n+2){background:var(--teal-soft);color:#146f68}
.hint-cloud span:nth-child(4n+3){background:var(--violet-soft);color:#6b35bc}
.hint-cloud span:nth-child(4n){background:var(--amber-soft);color:#9a5a0d}
.idea-route-grid a:nth-child(3n+1){border-top:3px solid var(--accent)}
.idea-route-grid a:nth-child(3n+2){border-top:3px solid var(--teal)}
.idea-route-grid a:nth-child(3n){border-top:3px solid var(--accent-2)}
.mind-panel{box-shadow:0 5px 18px rgba(24,34,48,.035)}

.footer{border-top:1px solid rgba(216,222,232,.78);margin-top:18px}

@media(max-width:820px){
  .question-hero{margin-top:18px;border-radius:18px;padding:30px 22px 26px}
  .desktop-nav{gap:3px}
}


/* v22 parrot-green public canvas + energetic navigation */
:root{
  --parrot-bg:#efffd2;
  --parrot-soft:#e4ffc0;
  --parrot:#79cf38;
  --parrot-deep:#4d9b24;
  --sky:#3979d7;
  --violet:#7a48d7;
  --coral:#df6b62;
  --aqua:#168d87;
  --sun:#c98212;
  --bg:var(--parrot-bg);
}
body{
  background-color:var(--parrot-bg);
  background-image:
    radial-gradient(circle at 14% 12%,rgba(121,207,56,.22) 0 2.3px,transparent 3px),
    radial-gradient(circle at 78% 20%,rgba(57,121,215,.12) 0 2px,transparent 2.8px),
    repeating-linear-gradient(135deg,rgba(77,155,36,.048) 0 1px,transparent 1px 30px),
    linear-gradient(118deg,rgba(255,255,255,.42) 0%,rgba(255,255,255,.10) 36%,rgba(255,241,101,.10) 67%,rgba(122,72,215,.045) 100%);
  background-size:76px 76px,104px 104px,38px 38px,100% 100%;
  background-position:0 0,31px 17px,0 0,0 0;
  background-attachment:fixed;
}
.topbar{
  background:rgba(251,255,244,.93);
  border-bottom-color:#cce5a7;
  box-shadow:0 5px 22px rgba(69,124,36,.065);
}
.brand::before{
  background:linear-gradient(135deg,var(--parrot),#68bf3a 35%,var(--sky) 67%,var(--violet));
  box-shadow:0 5px 15px rgba(88,164,52,.25);
}
.desktop-nav a,.mobile-nav a{--nav-color:var(--parrot-deep);--nav-soft:#efffdf}
.desktop-nav a:nth-child(1),.mobile-nav a:nth-child(1){--nav-color:var(--parrot-deep);--nav-soft:#eaffd8}
.desktop-nav a:nth-child(2),.mobile-nav a:nth-child(2){--nav-color:var(--sky);--nav-soft:#edf5ff}
.desktop-nav a:nth-child(3),.mobile-nav a:nth-child(3){--nav-color:var(--violet);--nav-soft:#f5efff}
.desktop-nav a:nth-child(4),.mobile-nav a:nth-child(4){--nav-color:var(--coral);--nav-soft:#fff1ef}
.desktop-nav a:nth-child(5),.mobile-nav a:nth-child(5){--nav-color:var(--aqua);--nav-soft:#eafaf7}
.desktop-nav a:nth-child(6),.mobile-nav a:nth-child(6){--nav-color:var(--sun);--nav-soft:#fff6e4}
.desktop-nav a:hover{background:var(--nav-soft);color:var(--nav-color)}
.desktop-nav a.active{
  color:var(--nav-color);
  background:var(--nav-soft);
  box-shadow:inset 0 -2px 0 var(--nav-color);
}
.mobile-nav>div{background:rgba(255,255,255,.98);border-color:#cfe0b5}
.mobile-nav a:hover{background:var(--nav-soft);color:var(--nav-color)}
.question-hero{
  border-color:#c4df9d;
  background:
    radial-gradient(circle at 92% 15%,rgba(121,207,56,.18),transparent 13rem),
    linear-gradient(135deg,rgba(255,255,255,.96),rgba(242,255,219,.97) 52%,rgba(241,247,255,.95));
  box-shadow:0 12px 32px rgba(74,132,37,.10);
}
.question-hero::after{
  background:linear-gradient(135deg,rgba(121,207,56,.25),rgba(57,121,215,.12),rgba(122,72,215,.11));
}
.stats>div,.subject-tile,.pathways>div,.question-row,.topic-row,.solver-card,.case-browser>a,.case-question-list>a,.section-card,.mind-card,.mind-panel,.mind-intro,.idea-public-assets figure,.empty-state,.context-sidebar{
  background-color:rgba(255,255,255,.94);
}
.stats>div{border-color:#d7e8c1}
.subject-tile,.pathways>div,.section-card,.question-row,.case-browser>a,.case-question-list>a{border-color:#dce8cd}
.footer{border-top-color:rgba(116,163,79,.28);color:#596653}
@media(max-width:820px){
  body{background-size:68px 68px,92px 92px,34px 34px,100% 100%;background-attachment:scroll}
}