:root{--void:#0B0B0D;--charcoal:#121214;--steel:#2A2A2E;--ash:#D6D6D8;--bone:#F2F2F3;--red:#C0392B;--muted:#a4a4aa;--line:#303035;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;font-synthesis:none;color:var(--bone);background:var(--void)}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:var(--void)}button,input,select{font:inherit}button{cursor:pointer;color:inherit;border:1px solid var(--line);background:#19191c;border-radius:6px;padding:9px 12px;font-size:12px;font-weight:600;transition:background .18s,border-color .18s}button:hover{background:#28282c;border-color:#62626a}button:disabled{opacity:.4;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--bone);outline-offset:4px}button[aria-pressed=true]{border-color:var(--bone);background:#2a2a2e}a{color:var(--bone);text-underline-offset:4px}p{line-height:1.6}h1,h2,h3,p{margin-top:0}button.primary{background:var(--red);border-color:var(--red);color:white}button.primary:hover{background:#a63024}.eyebrow{text-transform:uppercase;letter-spacing:.13em;font-size:10px;font-weight:750;color:var(--muted)}.app{height:100dvh;min-height:640px;display:flex;flex-direction:column}.brandbar{height:80px;flex:none;display:flex;align-items:center;justify-content:space-between;padding:12px 24px;border-bottom:1px solid var(--line);gap:20px;background:var(--void);z-index:12}.brand{display:flex;gap:16px;align-items:center}.brand img{width:42px;height:55px;object-fit:contain}.wordmark{font-weight:750;letter-spacing:-.045em;font-size:24px;line-height:1.05}.wordmark 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strong{font-weight:650;color:var(--ash)}.drawerback{position:fixed;inset:0;background:#000a;backdrop-filter:blur(8px);z-index:100;display:none;padding:30px;align-items:center;justify-content:center}.drawerback.open{display:flex}.drawer{width:min(850px,100%);max-height:90dvh;overflow-y:auto;background:var(--charcoal);border:1px solid #54545b;border-radius:12px;box-shadow:0 25px 90px #000b}.drawerheader{display:flex;align-items:center;justify-content:space-between;padding:22px 26px;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--charcoal);z-index:1}.drawerheader h2{font-size:21px;letter-spacing:-.03em;margin:0}.drawerbody{padding:24px 26px}.drawerbody p,.drawerbody li{font-size:13px;line-height:1.75;color:var(--ash)}.drawerbody h3{font-size:15px;margin-top:22px}.drawerbody .grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.doccard{border:1px solid var(--line);padding:16px;border-radius:6px}.doccard h3{margin-top:0;margin-bottom:8px}.doccard 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@media(min-width:1700px){.shell{grid-template-columns:250px minmax(0,1fr) 340px}.journey .jt{font-size:12px}.journey .js{font-size:10px}.deckhead h2{font-size:23px}.deckhead p,.field p{font-size:13px}.stageintro{top:100px;max-width:480px}.stageintro .outline{width:460px;height:120px}.stageintro p{font-size:15px;max-width:400px}}
@media(max-width:1200px) and (min-width:851px){.shell{grid-template-columns:190px minmax(0,1fr) 265px}.brandbar{padding:12px 16px}.showname{display:none}.journey{padding:9px 7px;gap:7px}.journey .jt{font-size:10px}.stageintro .outline{width:270px;height:80px}.stageintro p{max-width:260px;font-size:11px}.stagehud{left:15px;right:15px}.concept{display:none}.legend{font-size:8px;gap:8px;left:15px}.maphelper{display:none}.deckhead,.tabpanel{padding:17px 15px}.controlbox{margin:0 10px 14px}.playcontrols button{padding:6px 8px;font-size:10px}.playcontrols #home{display:none}}
@media(max-width:850px){.app{height:auto;min-height:100dvh}.brandbar{height:75px;padding:10px 15px;gap:9px}.brand{gap:10px}.brand img{width:34px;height:47px}.wordmark{font-size:19px}.wordmark small{font-size:7px;letter-spacing:.1em}.showname{display:none}.toptools button{font-size:10px;padding:8px}.shell{display:flex;flex-direction:column}.rail{display:none}.mobilejourney{display:flex;padding:12px 14px;align-items:center;gap:10px;border-bottom:1px solid var(--line);background:var(--charcoal)}.mobilejourney label{font-size:10px;color:var(--ash)}.mobilejourney select{min-width:0;flex:1;background:#202023;border:1px solid var(--line);color:var(--bone);border-radius:5px;padding:9px;font-size:12px}.stage{height:60dvh;min-height:430px;flex:none}.sidedeck{border-left:0;border-top:1px solid var(--line);overflow:visible}.deckhead{padding:19px}.deckhead h2{font-size:24px}.deckhead p{font-size:14px}.field p{font-size:13px}.detailtabs{max-width:600px}.controlbox{margin:0 18px 18px}.controlbox p{font-size:12px}.switchline span{font-size:13px}.deckfoot{display:flex;gap:8px;flex-wrap:wrap}.deckfoot button{width:auto;flex:1}.deckfoot .micro{width:100%}.stageintro{left:20px;top:88px;max-width:300px}.stageintro .outline{height:83px;width:290px}.stageintro p{font-size:12px;max-width:280px}.stagehud{left:16px;right:16px;top:16px}.stagebadge{font-size:8px;padding:7px}.concept{font-size:7px;top:61px;right:15px;max-width:165px}.legend{font-size:8px;left:15px;bottom:15px;padding:7px}.maphelper{display:none}.tracktitle{font-size:11px}.playcontrols button{padding:6px 8px;font-size:10px}.playcontrols #home{display:none}.footer{padding:12px 15px;line-height:1.5}.footer .keys{display:none}.drawerback{padding:12px}.drawer{max-height:94dvh}.drawerbody{padding:18px}.drawerbody .grid{grid-template-columns:1fr}.drawerheader{padding:18px}}
@media(max-width:560px){.stage.overviewmode .stageintro{max-width:330px;background:linear-gradient(90deg,#0b0b0de8,#0b0b0d00)}.stage.overviewmode .stageintro p{max-width:310px}.stage.overviewmode .stageintro .outline{height:82px}.legend{gap:8px;font-size:7px}.stage.comparing .mapcaption .location{max-width:100%;font-size:9px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}
[hidden]{display:none!important}
.shell{grid-template-columns:230px minmax(0,1fr) 345px}
.toptools{flex-wrap:wrap}.toptools #course{background:var(--bone);color:var(--void)}
.course-entry{padding:14px 15px;border-bottom:1px solid var(--line)}.course-entry button{width:100%;text-align:left}.course-entry small{display:block;font-size:9px;line-height:1.5;color:var(--muted);margin:8px 0}.course-entry progress{width:100%;height:4px;accent-color:var(--red)}
.lesson-strip{padding:12px 18px;border-bottom:1px solid var(--line);background:#141416;flex:none}.lesson-strip p{font-size:11px;color:var(--ash);line-height:1.5;margin:5px 0 0}.lesson-tools{display:flex;gap:6px;margin-top:9px;flex-wrap:wrap}.lesson-tools button{font-size:10px;padding:7px 9px}
.lesson-notice{font-size:10px;line-height:1.5;color:var(--ash);border-left:3px solid var(--red);padding:8px 10px;background:#1b1b1f}.lesson-task{font-size:12px;line-height:1.6}.lesson-task strong{font-size:10px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted)}
.evidence-card{border:1px solid #44444b;border-radius:5px;margin:11px 0;background:#0b0b0d;overflow:hidden}.evidence-card summary{cursor:pointer;padding:12px;font-size:12px;line-height:1.45}.evidence-card summary:focus-visible{outline:2px solid var(--bone);outline-offset:-3px}.evidence-card summary .eyebrow{display:block;font-size:8px;margin-bottom:6px}.evidence-card pre{white-space:pre-wrap;overflow-wrap:anywhere;font:11px/1.65 ui-monospace,Consolas,monospace;margin:0;padding:13px;border-top:1px solid var(--line);color:var(--ash)}
.full{width:100%;margin-top:8px}.prediction-question{font-size:17px;line-height:1.45}.answer-options{display:flex;flex-direction:column;gap:9px}.answer-option{font-size:12px;line-height:1.55;text-align:left;padding:12px}.answer-option.chosen{border-color:var(--bone);background:#343439}.answer-feedback{margin:15px 0;border-left:3px solid var(--bone);padding:12px;background:#242428;font-size:12px;line-height:1.65}.answer-feedback p{margin:6px 0 0}.lesson-actions{display:flex;gap:8px;flex-wrap:wrap;margin:15px 0}.lesson-actions button{font-size:11px}.lesson-takeaway{border-top:1px solid var(--line);margin-top:18px;padding-top:18px}
.course-list{list-style:none;margin:20px 0 0;padding:0;display:flex;flex-direction:column;gap:8px}.course-list button{display:flex;gap:16px;align-items:center;text-align:left;width:100%;padding:17px;background:#171719}.course-num{font-size:20px;color:#b5b5bc;min-width:28px}.course-list button>span:nth-child(2){flex:1}.course-list strong{font-size:14px}.course-list small{display:block;font-weight:400;font-size:12px;line-height:1.5;margin-top:5px;color:var(--ash)}.course-list em{display:block;font-style:normal;font-weight:400;font-size:10px;margin-top:7px;color:var(--muted)}
.report-label{font-size:10px;letter-spacing:.12em;border-left:4px solid var(--red);padding:10px 12px;background:#232327}.report-fields{margin:18px 0}.report-fields>div{padding:15px 0;border-bottom:1px solid var(--line)}.report-fields dt{text-transform:uppercase;font-size:10px;letter-spacing:.09em;color:var(--muted);margin-bottom:7px}.report-fields dd{font-size:14px;line-height:1.7;margin:0;color:var(--bone)}.lesson-link{display:block;width:100%;padding:12px;background:var(--void);color:var(--bone);border:1px solid #777;font-size:12px;margin:8px 0}.link-label{font-size:12px}
@media(max-width:1200px) and (min-width:851px){.shell{grid-template-columns:190px minmax(0,1fr) 300px}.brandbar{gap:10px}.toptools button{font-size:10px;padding:7px}.lesson-strip{padding:10px 12px}}
@media(max-width:850px){.lesson-strip{padding:13px 16px}.lesson-strip p{font-size:12px}.toptools{flex-wrap:nowrap}.brandbar{height:auto;min-height:75px}.lesson-tools button{font-size:11px}.course-list button{padding:14px 10px;gap:10px}.course-list small{font-size:11px}}

.classroom-site-nav{flex:none;padding:10px 24px;border-bottom:1px solid var(--line);background:var(--void)}
.classroom-site-nav .links{display:flex;align-items:center;flex-wrap:wrap;gap:10px 22px;font-size:12px;line-height:1.5}
.classroom-site-nav a{text-decoration:none;color:var(--ash)}
.classroom-site-nav a:hover,.classroom-site-nav a[aria-current=page]{color:var(--bone);text-decoration:underline}
.classroom-site-nav a:last-child{margin-left:auto}
.classroom-skip{position:absolute;top:8px;left:8px;transform:translateY(-200%);z-index:300;background:var(--bone);color:var(--void);padding:12px}
.classroom-skip:focus{transform:none}
.classroom-noscript{padding:20px;font-size:15px}
.footer{align-items:center;gap:12px 24px;font-size:10px}
.footer nav{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:7px 15px;font-size:11px;line-height:1.5}
.classroom-footer-note{display:block;margin-top:4px}
@media(max-width:850px){.classroom-site-nav{padding:10px 15px}.classroom-site-nav .links{gap:8px 16px}.footer{flex-direction:column;align-items:flex-start}.footer nav{justify-content:flex-start}.classroom-site-nav a:last-child{margin-left:0}}

@media(max-width:850px){.brandbar{flex-wrap:wrap}.toptools{width:100%;flex-wrap:wrap}.toptools button{flex:1;min-height:36px}}