:root{color-scheme:dark;--bg:#09161d;--line:#233e49;--text:#e3eeee;--muted:#89a5ae;--green:#77ddc8}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 28% -20%,#25465188,transparent 52%),var(--bg);color:var(--text);font-family:Inter,-apple-system,BlinkMacSystemFont,"PingFang SC","Segoe UI",sans-serif;font-size:14px}button,input,select{font:inherit}button{cursor:pointer;color:inherit;border:0}a{color:inherit}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:2px solid #aaffea;outline-offset:4px}button:disabled{opacity:.4;cursor:wait}[hidden]{display:none!important}.shell{max-width:1880px;margin:auto;padding:0 30px}.site-head{height:80px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none}.brand svg{width:32px;height:27px;fill:none;stroke:var(--green);stroke-width:1.8}.brand strong{font-size:24px;letter-spacing:-.7px}.brand span{font-size:12px;color:#9fb6bf;border-left:1px solid #35515c;padding-left:13px}.brand small{font-size:10px;color:#5a7a86;align-self:start;margin-top:5px}.edition{font-size:11px;letter-spacing:.14em;color:#6b8c96}.player{position:relative;display:flex;flex-direction:column;background:#0e1d26;border:1px solid #2b4652;border-radius:14px;overflow:hidden;box-shadow:0 30px 90px #0003;min-width:0}.course-head{display:flex;justify-content:space-between;align-items:center;padding:18px 24px;gap:18px;background:#10222c}.course-title{min-width:0}.eyebrow{color:#78aaa8;font-size:10px;letter-spacing:.13em}.course-head h1{font-size:23px;line-height:1.4;font-weight:580;letter-spacing:.03em;margin:5px 0 0}.head-actions{display:flex;align-items:center;gap:5px;flex:none}.quiet{padding:8px 10px;background:transparent;border:1px solid transparent;border-radius:6px;font-size:12px;color:#9bb6c0;white-space:nowrap}.quiet:hover{background:#1c3541;color:#eefcf5}.quiet[aria-pressed=false]{opacity:.6}.quiet.small{font-size:10px;padding:7px}.chapters{display:grid;grid-template-columns:repeat(3,1fr);background:#10222c;border-top:1px solid #1e3743;border-bottom:1px solid #2c4550;padding:0 20px;gap:15px}.chapter{display:flex;align-items:center;gap:10px;position:relative;border-bottom:2px solid transparent;background:transparent;color:#718f9d;text-align:left;padding:13px 4px;font-size:12px;min-width:0}.chapter b{font-weight:500;line-height:1.45}.chapter span{font-size:10px;letter-spacing:.04em;flex:none}.chapter.active{border-color:#77d3bf;color:#dff9ef}.chapter.active span{color:#7ce9ca}.chapter.done span{color:#7caf9d}.player-stage{position:relative;height:clamp(390px,calc(100dvh - 405px),860px);min-height:0;background:#0a1821}.loading{position:absolute;inset:0;display:grid;place-items:center;color:#94bab8;font-size:14px}.narrative{padding:13px 24px 17px;background:#112530;border-top:1px solid #29414d;flex-shrink:0;min-height:110px}.narrative-top{display:flex;align-items:center;gap:12px;color:#6f939f;font-size:10px;line-height:1.4;margin-bottom:9px}.narrative-top #modeLabel{color:#77d9c3}.practice-link{margin-left:auto;border:1px solid #3a635d;background:#1c3b38;color:#b5e5d5;border-radius:5px;font-size:11px;padding:5px 9px;white-space:nowrap}.practice-link:hover{background:#2a5146}.narrative p{font-size:15px;line-height:1.8;margin:0;color:#e3edee;max-width:1450px;letter-spacing:.02em}.narrative.captions-off #caption{display:none}.narrative.captions-off{min-height:48px}.practice-feedback{margin-top:10px;border-left:2px solid #86cabc;padding:6px 10px;font-size:12px;line-height:1.6;color:#aad6c9;background:#163b36}.practice-feedback.warning{color:#f1d39c;border-color:#d1b277;background:#3a3021}.practice-actions{display:flex;align-items:center;gap:15px;margin-top:5px}.controls{padding:11px 22px 14px;background:#0c1b24;flex-shrink:0;border-top:1px solid #19333e}.timeline{display:flex;align-items:center;gap:13px;color:#789aa7;font-size:10px;font-variant-numeric:tabular-nums}.timeline input{min-width:0;flex:1;accent-color:#78dbc4;height:12px;cursor:pointer}.control-row{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:9px}.control-left,.control-right{display:flex;align-items:center;gap:12px;flex:1}.control-right{justify-content:flex-end}.control-left #position{font-size:11px;color:#7397a4;font-variant-numeric:tabular-nums}.play-controls{display:flex;align-items:center;gap:17px}.icon-button{width:34px;height:34px;display:grid;place-items:center;background:transparent;border-radius:7px;font-size:29px;line-height:1;color:#adc5cc}.icon-button:hover{background:#1d3946;color:white}.icon-button svg{width:20px;height:20px;stroke:currentColor;stroke-width:1.7;fill:none}.play-button{display:flex;align-items:center;justify-content:center;gap:9px;padding:10px 20px;min-width:112px;border-radius:7px;background:#78dec6;color:#082b2c;font-size:13px;font-weight:650;line-height:1.35}.play-button:hover{background:#9defd9}#playIcon{font-size:12px}.control-right select{background:#142d39;color:#a8c3cc;border:1px solid #34505c;border-radius:5px;padding:6px 4px;font-size:11px;width:60px}.page-foot{display:flex;justify-content:space-between;gap:15px;color:#527783;font-size:10px;padding:17px 2px 26px}.player:fullscreen,.player.theater{height:100dvh;width:100%;max-width:none;border:0;border-radius:0;background:#0b1c26}.player.theater{position:fixed;inset:0;z-index:200}.player:fullscreen .course-head,.player.theater .course-head{padding:12px 24px;flex-shrink:0}.player:fullscreen .course-head h1,.player.theater .course-head h1{font-size:21px;margin:0}.player:fullscreen .eyebrow,.player.theater .course-head .eyebrow{display:none}.player:fullscreen .chapters,.player.theater .chapters{flex-shrink:0}.player:fullscreen .chapter,.player.theater .chapter{padding-block:10px}.player:fullscreen .player-stage,.player.theater .player-stage{height:auto;flex:1;min-height:0}.player:fullscreen .narrative,.player.theater .narrative{min-height:98px}.player:fullscreen .controls,.player.theater .controls{padding-bottom:max(12px,env(safe-area-inset-bottom))}.controls-dim .controls{opacity:.55;transition:opacity .4s}.controls:hover{opacity:1}.end-card{position:absolute;inset:0 0 94px;z-index:50;background:#0a1b24ed;backdrop-filter:blur(9px);display:grid;place-items:center;padding:30px;text-align:center}.end-content{max-width:650px}.end-check{display:grid;place-items:center;margin:auto auto 24px;border:1px solid #619d87;background:#163a33;color:#a6efd2;width:60px;height:60px;border-radius:50%;font-size:27px}.end-content h2{font-size:clamp(22px,2.6vw,36px);line-height:1.5;font-weight:550}.end-content>p:not(.eyebrow){color:#97b9c0;line-height:1.8;font-size:14px}.end-buttons{display:flex;justify-content:center;gap:15px;flex-wrap:wrap;margin-top:30px}.secondary{background:#213d47;color:#c4e2e2;border:1px solid #3d6269;padding:10px 15px;border-radius:6px;font-size:12px;cursor:pointer}.info-dialog{width:min(800px,94vw);max-height:86dvh;border:1px solid #42616d;border-radius:12px;background:#102731;color:#d4e7e8;padding:24px;box-shadow:0 20px 100px #0008}.info-dialog::backdrop{background:#04121acb;backdrop-filter:blur(5px)}.info-dialog header{display:flex;justify-content:space-between;align-items:center;gap:15px}.info-dialog h2{font-size:21px;margin:0}.info-dialog h3{font-size:14px;color:#9bd7c4;margin-top:26px}.info-dialog p,.info-dialog li{font-size:13px;line-height:1.8;color:#a4bdc7}.info-dialog ul{padding-left:18px}.info-dialog li{margin:10px 0}.info-dialog a{color:#91d2cd}.info-dialog details{border-top:1px solid #2e4a56;margin:16px 0;padding-top:12px}.info-dialog summary{font-size:12px;color:#c3d9dd;cursor:pointer}.info-dialog .source-row{margin-top:15px;border-bottom:1px solid #29434e;padding-bottom:10px}.info-dialog .source-row small{display:block;color:#71969f;font-size:10px;overflow-wrap:anywhere;line-height:1.6}.toast{position:absolute;left:50%;bottom:104px;transform:translateX(-50%);z-index:70;width:max-content;max-width:min(620px,90%);padding:10px 15px;border:1px solid #4e8072;border-radius:8px;background:#23483eee;color:#d4f3e4;font-size:12px;line-height:1.6;box-shadow:0 5px 30px #0005}
@media(min-width:1600px){.site-head{height:86px}.course-head h1{font-size:26px}.course-head{padding:20px 28px}.chapter{font-size:14px;padding-block:15px}.narrative p{font-size:18px}.narrative{padding:16px 28px 19px;min-height:120px}.narrative-top{font-size:11px}.player:fullscreen .course-head h1{font-size:24px}.player:fullscreen .narrative{min-height:112px}.player-stage{height:calc(100dvh - 420px)}}
@media(max-width:1100px){.shell{padding:0 18px}.course-head{padding:16px 20px}.course-head h1{font-size:20px}.narrative{padding-inline:20px}.narrative p{font-size:14px}}
@media(max-width:820px),(max-width:1000px) and (max-height:600px){.shell{padding:0 10px 110px}.site-head{height:65px}.brand strong{font-size:22px}.brand span{font-size:10px}.edition{display:none}.course-head{align-items:flex-start;gap:12px;padding:17px 14px}.course-head h1{font-size:19px}.head-actions{gap:0;flex-direction:column;align-items:flex-end}.head-actions .quiet{font-size:10px;padding:6px 7px}.chapters{padding:0 12px;gap:8px}.chapter{padding:12px 0;align-items:flex-start;gap:6px;font-size:11px}.chapter span{font-size:9px;padding-top:2px}.player,.player:fullscreen,.player.theater{overflow:visible}.player-stage,.player:fullscreen .player-stage,.player.theater .player-stage{height:auto;min-height:0;flex:none}.narrative,.player:fullscreen .narrative,.player.theater .narrative{padding:14px;min-height:0}.narrative p{font-size:14px;line-height:1.85}.narrative-top{gap:7px;font-size:9px;flex-wrap:wrap}.practice-link{font-size:10px}.controls,.player:fullscreen .controls,.player.theater .controls{position:fixed;left:0;right:0;bottom:0;z-index:60;padding:9px 14px max(12px,env(safe-area-inset-bottom));background:#0c1b24f5;box-shadow:0 -8px 30px #0005;border-top:1px solid #35515d;opacity:1}.control-left{flex:0;gap:3px}.control-left #position{display:none}.control-right{flex:0;gap:4px}.play-controls{gap:5px}.control-row{gap:7px}.play-button{padding:10px 12px;min-width:88px}.control-right select{width:53px}.icon-button{width:29px;height:32px}.quiet.small{font-size:9px;padding:6px 4px}.page-foot{font-size:9px;padding-inline:3px}.page-foot span:last-child{display:none}.player:fullscreen,.player.theater{height:100dvh;overflow-y:auto;padding-bottom:110px;display:block}.player:fullscreen .course-head,.player.theater .course-head{padding:14px}.player:fullscreen .course-head h1,.player.theater .course-head h1{font-size:19px}.end-card{position:fixed;inset:0 0 103px;padding:20px}.toast{position:fixed;bottom:112px;font-size:11px}.info-dialog{padding:18px}.info-dialog h2{font-size:18px}.brand small{display:none}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.controls-dim .controls{transition:none}}

@media(max-width:820px),(max-width:1000px) and (max-height:600px){
 .player[data-mode=practice] .controls{position:static;box-shadow:none}
 .st-stage[data-complete=true] .st-step-title,.st-stage[data-complete=true] .st-instruction{display:none}
}

.chapters{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:0}
.chapter{min-width:0}.chapter b{font-size:12px}.chapter span{font-size:10px}
.current-chapter{font-weight:500;color:#b5d6d0;margin-left:18px;letter-spacing:0}
.chapter-dialog{width:min(980px,95vw);max-width:980px}
.menu-group{margin:20px 0}.menu-group h3{color:#85c9ba;font-size:13px;font-weight:500}
.menu-group>div{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.menu-chapter{display:grid;grid-template-columns:28px 1fr;gap:4px 8px;background:#152d38;border:1px solid #2c4d5b;border-radius:8px;text-align:left;padding:13px;color:#d2e4e3}
.menu-chapter span{color:#6cb7a6;font-variant-numeric:tabular-nums;font-size:12px}.menu-chapter strong{font-size:13px;font-weight:500}.menu-chapter small{grid-column:2;color:#89aab2;font-size:11px;line-height:1.65}.menu-chapter:hover,.menu-chapter.active{background:#21493f;border-color:#71b9a1}
.menu-tabs{display:flex;gap:8px;margin:22px 0 12px;position:sticky;top:-24px;background:#102731;padding:12px 0;z-index:1;border-bottom:1px solid #34505b}
.menu-tabs button{background:#18343e;border:1px solid #375762;color:#b4c9d0;border-radius:7px;padding:10px 14px;font-size:13px}
.menu-tabs button[aria-pressed=true]{background:#275246;color:#dcf4e6;border-color:#78bca7}
.plan-intro{padding:0 0 12px;color:#99b6bf}
.classroom-block{display:grid;grid-template-columns:36px 1fr;gap:14px;padding:22px 0;border-top:1px solid #31505a}
.classroom-number{color:#75bda9;font-size:19px;padding-top:3px}
.classroom-block h3{display:flex;justify-content:space-between;gap:12px;margin:0 0 12px;font-size:17px;color:#d8ede4}
.classroom-block h3 span{font-size:13px;color:#a7d6c7;white-space:nowrap}
.classroom-block p{margin:8px 0}.classroom-block .plan-timing{font-size:11px;color:#789ca8}
.classroom-block .plan-prompt{color:#dfcf9e;border-left:2px solid #b8a16c;padding-left:12px;margin:14px 0}
.classroom-block .secondary{margin-top:7px}
@media(max-width:820px){.chapters{display:flex;overflow-x:auto;scrollbar-width:thin}.chapter{flex:0 0 112px}.head-actions{flex-wrap:wrap;justify-content:flex-end}.head-actions button{padding:6px}.current-chapter{display:block;margin:5px 0 0}.menu-group>div{grid-template-columns:1fr 1fr}.chapter-dialog{width:95vw}}
@media(max-width:450px){.menu-group>div{grid-template-columns:1fr}.course-head{align-items:flex-start}.head-actions{max-width:160px}.course-head h1{font-size:19px}}

/* One spoken idea at a time. Captions no longer resize the stage for a paragraph. */
.narrative{min-height:116px;height:116px;display:flex;flex-direction:column;justify-content:center}
.narrative-top{flex:none}.narrative p{max-width:1380px;font-size:clamp(16px,1.1vw,21px);line-height:1.65;letter-spacing:.035em;text-wrap:pretty}
.player:fullscreen .narrative,.player.theater .narrative{min-height:112px;height:112px}
.narrative.captions-off{min-height:48px;height:48px}
.player[data-mode=practice] .narrative{height:auto;min-height:116px}
@media(max-width:820px),(max-width:1000px) and (max-height:600px){.narrative,.player:fullscreen .narrative,.player.theater .narrative{height:auto;min-height:112px}.narrative p{font-size:16px;line-height:1.75}.head-actions{flex-direction:row;max-width:175px;flex-wrap:wrap}.course-head{gap:14px}}