@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Instrument+Serif:ital@0;1&display=swap');
:root{color-scheme:light;--ink:#153337;--muted:#5c6c68;--paper:#f5f4ed;--sage:#dce3d5;--gold:#f5b72e;--line:#cbd3c9;--dark:#142e31;font-family:'DM Sans',Arial,sans-serif;line-height:1.5;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}body{margin:0}button,a{touch-action:manipulation}button{font:inherit;cursor:pointer}a{color:inherit}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #a05c00;outline-offset:4px}button:disabled{cursor:default;opacity:.5}.skip{position:absolute;top:-70px;background:white;padding:15px}.skip:focus{top:0;z-index:20}.masthead{display:flex;align-items:center;justify-content:space-between;padding:24px max(26px,calc((100vw - 1180px)/2));border-bottom:1px solid var(--line);gap:20px;background:#fffdf6}.brand{text-decoration:none;display:flex;align-items:center;gap:9px;font-size:12px;font-weight:700;letter-spacing:1px}.brand b{background:var(--gold);padding:5px 9px;font-size:20px}.brand span{font-size:9px;font-weight:500;letter-spacing:1.1px}.masthead>a:last-child{font-size:11px;text-decoration:none}main{max-width:1180px;margin:auto;padding:32px 26px 50px}.topline{display:flex;align-items:center;justify-content:space-between;gap:15px}.eyebrow{font-size:10px;letter-spacing:1.6px;font-weight:700}.preview-label{font-size:10px;background:#e9eadf;padding:5px 10px;border-radius:20px;white-space:nowrap}.chapters{display:grid;grid-template-columns:repeat(3,1fr);border-bottom:1px solid var(--line);margin:27px 0 32px}.chapters button{border:0;background:none;color:#76817a;text-align:left;padding:15px 9px 15px 0;font-size:11px;border-bottom:3px solid transparent}.chapters button span{font-size:13px;margin-left:10px}.chapters button[aria-current=true]{color:var(--ink);border-color:var(--ink);font-weight:700}h1,h2,h3,p{margin-top:0}h1{font:400 clamp(42px,5.3vw,70px)/1.04 'Instrument Serif',Georgia,serif;letter-spacing:-1.5px;margin-bottom:23px}h1 em{color:#617b67}h2{font:400 36px/1.13 'Instrument Serif',Georgia,serif}h3{font-size:17px}p{font-size:14px}.muted{color:var(--muted)}.hero{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;min-height:385px}.hero-copy>p{font-size:16px;max-width:460px;color:var(--muted)}.hero-copy .eyebrow{display:block;margin-bottom:20px;color:var(--ink)}.button{display:inline-flex;align-items:center;justify-content:center;gap:20px;border:1px solid var(--ink);background:var(--ink);color:white;border-radius:5px;padding:13px 20px;font-size:13px;font-weight:600;text-decoration:none;min-height:46px}.button.gold{background:var(--gold);border-color:var(--gold);color:#142e31}.button.ghost{background:transparent;color:var(--ink)}.actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:24px}.scene{height:385px;border-radius:14px;background:linear-gradient(#b8d4d7 0 62%,#a3b5a0 62%);position:relative;overflow:hidden;isolation:isolate}.sun{position:absolute;width:155px;height:155px;border-radius:50%;right:42px;top:38px;background:#f4bd70}.mountain{position:absolute;inset:125px -25px 50px;background:#879b8d;clip-path:polygon(0 55%,22% 4%,49% 56%,68% 21%,100% 75%,100% 100%,0 100%)}.mountain.back{background:#a2b4a4;transform:translateY(-30px) scaleX(-1)}.scene-ground{position:absolute;bottom:0;height:105px;width:100%;background:#8b9c82;clip-path:polygon(0 28%,100% 0,100% 100%,0 100%)}.car{position:absolute;left:12%;bottom:68px;width:75%;height:102px;background:#8c9d9e;border:2px solid #344e50;border-radius:30px 30px 13px 13px;box-shadow:inset 0 -18px #718789;transform:skewY(-2deg)}.car:before{content:'';position:absolute;left:38px;right:32px;top:-56px;height:61px;border:3px solid #344e50;background:linear-gradient(90deg,#30494c 47%,#8c9d9e 47% 50%,#30494c 50%);border-radius:32px 25px 0 0;transform:skew(-11deg)}.wheel{position:absolute;width:58px;height:58px;background:#233b3d;border:9px solid #32484a;border-radius:50%;bottom:-22px;left:32px;box-shadow:inset 0 0 0 6px #a5afab}.wheel.right{left:auto;right:30px}.car-light{position:absolute;left:8px;top:21px;width:16px;height:32px;background:#f2edcb;border:3px solid #314b4b;border-radius:12px}.scene-caption{position:absolute;left:20px;top:17px;font-size:9px;letter-spacing:1.5px}.scene-watch{position:absolute;right:23px;bottom:18px;background:#122d30;border:5px solid #c7cebc;border-radius:22px;padding:14px 16px;color:var(--gold);font-size:18px;transform:rotate(8deg);box-shadow:0 7px 18px #19363044}.scene-watch span{display:block;font-size:9px;color:#ebf1e7}.design-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:35px 0}.design-card{padding:23px;background:white;border:1px solid var(--line);border-radius:8px}.design-card .number{font:400 34px 'Instrument Serif',Georgia,serif;color:#69856d}.design-card h3{margin:9px 0}.design-card p{font-size:13px;margin-bottom:0;color:var(--muted)}.note{background:#e8eddf;padding:21px 24px;border-left:3px solid #7e977e;border-radius:3px}.note p{margin:5px 0 0}.workspace{display:grid;grid-template-columns:190px 1fr;gap:24px}.rail{border-right:1px solid var(--line);padding-right:22px}.rail ol{list-style:none;padding:0;margin:24px 0}.rail li{font-size:12px;padding:11px 0;color:#728076;display:flex;gap:10px}.rail li b{display:grid;place-items:center;width:23px;height:23px;flex-shrink:0;border:1px solid var(--line);border-radius:50%;font-size:10px}.rail li.active{color:var(--ink);font-weight:700}.rail li.active b{background:var(--ink);color:white}.rail .button{padding:10px;font-size:11px;width:100%}.lesson-head{display:flex;justify-content:space-between;align-items:start;gap:20px}.lesson-head h2{margin:6px 0 14px}.phase{font-size:10px;color:#627665;letter-spacing:1px;font-weight:700}.progress{height:4px;background:#dce2d7;margin:0 0 22px;border-radius:4px;overflow:hidden}.progress span{height:100%;display:block;background:#66836b;transition:width .25s}.lesson-grid{display:grid;grid-template-columns:minmax(235px,.85fr) 1fr;gap:30px;align-items:start}.device-area{background:#dce3d5;border:1px solid #cbd4c5;border-radius:12px;padding:24px 22px 17px;display:flex;flex-direction:column;align-items:center;min-height:420px;position:relative}.device-label{font-size:9px;letter-spacing:1.2px;margin-bottom:15px;color:#5c7160}.phone{position:relative;width:min(255px,100%);border:7px solid #273d3c;border-radius:35px;background:#f4f3f7;box-shadow:0 9px 0 #a6b4a2,0 22px 25px #263d3320}.phone-window{position:relative;aspect-ratio:936/2034;overflow:hidden;border-radius:27px;background:#f4f3f7}.phone-window>img{position:absolute;width:120.2%;max-width:none;left:-10.1%;top:-7.8%;height:auto}.side-button{position:absolute;right:-12px;top:26%;height:52px;width:7px;border:0;background:#6e8079;border-radius:3px;padding:0;min-height:44px}.side-button:focus-visible{outline-offset:5px}.phone-illustration{padding:31px 18px 18px;min-height:420px;background:#f4f5ed}.phone-illustration:before{content:'';position:absolute;left:33%;top:8px;width:34%;height:14px;background:#273d3c;border-radius:20px}.phone-illustration h3{font-size:18px}.phone-illustration .app-name{font-size:10px;letter-spacing:2px;margin-bottom:23px;color:#667b6c}.digital-card{background:#246468;color:#f6c341;border-radius:10px;padding:22px 15px;text-align:center;font-size:42px;margin-bottom:20px}.digital-card small{display:block;font-size:9px;letter-spacing:3px;color:white;text-align:left}.illustrated-choice{width:100%;border:1px solid #d5ddcf;background:white;padding:12px 10px;margin:5px 0;border-radius:7px;text-align:left;font-size:12px}.hotspot{position:absolute;border:0;background:transparent;cursor:crosshair;padding:0;border-radius:10px;z-index:2}.hotspot:focus-visible{background:#ffbf0050;outline:3px solid #9b6000}.hotspot.cue{outline:3px solid #eab12b;background:#f5bf3640;box-shadow:0 0 0 7px #f5bf3620}.pointing-hand{position:absolute;z-index:6;width:83px;height:100px;pointer-events:none;transform:translate(0,0) rotate(-20deg);filter:drop-shadow(2px 4px 2px #0002);animation:customer-tap .8s ease-in-out}.pointing-hand:before{content:'';display:block;position:absolute;left:15px;top:0;width:19px;height:70px;border-radius:15px;background:#d8a376;border:2px solid #99704f}.pointing-hand:after{content:'';display:block;position:absolute;left:12px;top:42px;width:63px;height:55px;border-radius:16px 18px 5px 8px;background:#d8a376;border:2px solid #99704f}.hand-label{font-size:10px;margin:13px 0 0;color:#49614c;min-height:15px}.watch{position:relative;width:224px;margin:28px 0;border:9px solid #7f8c80;border-radius:43px;background:#070a08;box-shadow:0 7px #a6b4a2}.watch:before,.watch:after{content:'';position:absolute;width:105px;height:25px;background:#74866d;left:50%;transform:translateX(-50%);z-index:-1}.watch:before{top:-27px;border-radius:10px 10px 0 0}.watch:after{bottom:-27px;border-radius:0 0 10px 10px}.watch img{width:100%;display:block;border-radius:32px}.key-screen{position:relative;width:100%;max-width:330px;border:8px solid #273d3c;border-radius:12px;overflow:hidden}.key-screen img{display:block;width:100%;height:auto}.scene.small{height:300px;width:100%}.scene.small .car{transform:scale(.8);bottom:60px}.speech{background:white;border:1px solid var(--line);padding:18px 20px;border-radius:4px 18px 18px 18px;margin-bottom:18px}.speech .speaker{font-size:9px;letter-spacing:1.4px;color:#658068;font-weight:700}.speech p{font-size:15px;margin:7px 0 0}.task{padding:18px 0;border-top:1px solid var(--line)}.task h3{font-size:19px;margin-bottom:9px}.task p{font-size:13px;color:var(--muted)}.feedback{padding:15px 18px;border-radius:6px;background:#e7ecdf;border:1px solid #c6d5bc;font-size:13px;margin:16px 0}.feedback.wrong{background:#fff1d6;border-color:#d3b878}.feedback h4{margin:0 0 5px;font-size:13px}.feedback p{font-size:13px;margin:0}.choice-list{display:grid;gap:9px}.choice{border:1px solid #bdc9bc;background:#fffefa;color:var(--ink);border-radius:6px;padding:13px 15px;text-align:left;font-size:13px}.choice:hover{background:#edf1e5}.audio-controls{display:flex;align-items:center;gap:9px;margin:15px 0;font-size:11px;flex-wrap:wrap}.audio-controls button{border:1px solid var(--line);background:transparent;border-radius:20px;padding:6px 12px;font-size:11px}.audio-status{font-size:10px;color:var(--muted)}.help-link{border:0;border-bottom:1px solid #6b846b;background:none;color:#49634c;font-size:12px;padding:2px 0;margin-top:15px}.hint{font-size:12px;background:#f4e6bf;padding:12px;margin-top:12px}.stage-buttons{display:flex;justify-content:space-between;gap:10px;margin-top:22px}.stage-buttons .button{font-size:12px;padding:12px 16px}.device-note{font-size:9px;color:#5e715d;text-align:center;margin-top:14px}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:13px;margin:24px 0}.metric{padding:21px;background:white;border:1px solid var(--line);border-radius:8px}.metric strong{display:block;font:400 35px 'Instrument Serif',Georgia,serif}.metric span{font-size:11px;color:var(--muted)}.review-list{list-style:none;padding:0}.review-list li{display:flex;gap:12px;padding:14px 0;border-bottom:1px solid var(--line);font-size:13px}.review-list b{font-size:14px}.review-list p{margin:3px 0 0;font-size:12px;color:var(--muted)}.evidence-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.evidence-panel{padding:25px;background:#e7ecdf;border-radius:10px}.evidence-panel h3{margin-bottom:12px}.evidence-panel p{font-size:13px}.reference-links{font-size:11px;margin-top:28px;display:flex;gap:18px;flex-wrap:wrap}.watch-gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:25px}.watch-gallery button{border:2px solid transparent;background:#152d2e;border-radius:15px;padding:6px;color:white}.watch-gallery button[aria-pressed=true]{border-color:#e7ac1e}.watch-gallery img{width:100%;border-radius:10px;display:block}.watch-gallery span{display:block;font-size:10px;padding:7px 0}.watch-selected{display:flex;gap:25px;align-items:center}.watch-selected .watch{flex-shrink:0;width:190px}.watch-selected p{max-width:400px}footer{border-top:1px solid var(--line);padding:22px 26px;display:flex;justify-content:space-between;gap:20px;font-size:10px;max-width:1180px;margin:auto;color:var(--muted)}dialog{max-width:600px;width:calc(100% - 32px);max-height:85vh;border:1px solid var(--line);border-radius:12px;padding:30px;color:var(--ink);background:var(--paper)}dialog::backdrop{background:#102d31bb}.close{float:right;font-size:25px;border:0;background:none}details{padding:12px 0;border-bottom:1px solid var(--line);font-size:13px}summary{cursor:pointer;font-weight:600}details p{font-size:13px;margin:9px 0}.source-links{display:grid;gap:12px;font-size:12px;margin-top:20px}.empty{padding:40px;background:#e7ecdf;border-radius:10px}.result-badge{display:inline-block;padding:7px 13px;border-radius:20px;background:#d5e2c9;font-size:11px}.explain-list{font-size:13px;color:var(--muted);padding-left:19px}.explain-list li{margin-bottom:10px}
@keyframes customer-tap{0%{opacity:0;transform:translate(50px,40px) rotate(-20deg)}45%{opacity:1;transform:translate(0,0) rotate(-20deg)}70%{transform:translate(-3px,-3px) rotate(-20deg)}100%{opacity:1;transform:translate(0,0) rotate(-20deg)}}
@media(max-width:850px){.workspace{grid-template-columns:1fr}.rail{border:0;padding:0}.rail ol{display:flex;gap:14px;flex-wrap:wrap;margin:10px 0}.rail li{padding:3px 0}.rail .button{width:auto}.lesson-grid{gap:20px;grid-template-columns:minmax(220px,.9fr) 1fr}.hero{gap:24px}.brand .learning-lab{display:none}}
@media(max-width:600px){main{padding:24px 19px 35px}.masthead{padding:17px 19px}.masthead>a:last-child{font-size:10px}.eyebrow{font-size:8px}.chapters{margin:19px 0 25px}.chapters button{font-size:9px;padding-bottom:12px}.chapters button span{display:block;font-size:10px;margin:5px 0 0}.hero{grid-template-columns:1fr;gap:22px}.hero-copy>p{font-size:14px}.scene{height:280px}.scene .car{bottom:58px;height:85px}.scene .sun{width:110px;height:110px}.design-grid{grid-template-columns:1fr;gap:12px}.design-card{padding:18px}.lesson-grid{grid-template-columns:1fr}.device-area{min-height:0}.phone{width:220px}.lesson-head h2{font-size:30px}.lesson-head .preview-label{display:none}.rail li{font-size:10px}.rail li b{width:19px;height:19px;font-size:9px}.rail .eyebrow{display:none}.rail ol{gap:9px}.workspace{gap:15px}.watch-gallery{grid-template-columns:repeat(2,1fr)}.metrics{gap:7px}.metric{padding:13px 10px}.metric strong{font-size:29px}.metric span{font-size:9px}.evidence-grid{grid-template-columns:1fr}.watch-selected{flex-direction:column;gap:10px}.watch-selected .watch{margin-top:30px}.key-screen{max-width:260px}.stage-buttons{flex-wrap:wrap}footer{padding:20px;font-size:9px;flex-direction:column;gap:7px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

#view h1,#view h2{scroll-margin-top:24px}

/* Separate the design rationale from the learner's scenario launch. */
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.design-first{margin-top:0;margin-bottom:24px}
.supplied-scene{background:#b8d4d7 url('/assets/learning/rivian-illustrated-scene.png') 95% 50%/165% auto no-repeat}
.phone-ready{text-align:center;background:linear-gradient(150deg,#b8d6d4,#e7e5c7)}
.ready-clock{font:400 46px/1.2 'Instrument Serif',Georgia,serif;margin:18px 0 40px}
.phone-ready .app-name{font-size:9px}.phone-ready .digital-card{margin:0 0 20px;padding:24px 12px}.phone-ready .digital-card small{text-align:center;font-size:8px;letter-spacing:1px}.phone-ready>p:last-child{font-size:13px}
.scenario-intro{padding:12px 0 28px}

.supplied-scene{background:#b8d4d7}.scene-art{position:absolute;display:block;width:165%;max-width:none;height:auto;left:-61.75%;top:50%;transform:translateY(-50%)}

/* Presentation is a narrated video; interaction starts in Application. */
.presentation h1{font-size:clamp(35px,4vw,53px);margin:12px 0 27px}.presentation-layout{display:grid;grid-template-columns:minmax(0,1.8fr) 1fr;gap:27px;align-items:start}.presentation video{display:block;width:100%;aspect-ratio:16/9;background:#153337;border-radius:10px}.video-helper{font-size:11px;color:var(--muted);margin:10px 0}.presentation-notes{padding:22px;background:#e7ecdf;border-radius:10px}.presentation-notes ol{padding-left:18px;font-size:12px;margin-bottom:0}.presentation-notes li{padding:0 0 15px 5px}.presentation-notes li:last-child{padding-bottom:0}.presentation-next{border-top:1px solid var(--line);margin-top:25px;padding-top:21px;display:flex;justify-content:space-between;align-items:center;gap:20px}.presentation-next p{font-size:12px;color:var(--muted);margin:0}.pointer-rings{display:none;position:absolute;z-index:5;width:60px;height:60px;transform:translate(-50%,-50%);pointer-events:none}.pointer-rings.visible{display:block}.pointer-rings i{position:absolute;inset:0;border:2px solid #dda923;border-radius:50%;animation:pointer-cascade 1.5s ease-out infinite;pointer-events:none}.pointer-rings i:nth-child(2){animation-delay:.25s}.pointer-rings i:nth-child(3){animation-delay:.5s}@keyframes pointer-cascade{0%{transform:scale(.15);opacity:.95}85%,100%{transform:scale(1);opacity:0}}@media(max-width:750px){.presentation-layout{grid-template-columns:1fr}.presentation-notes{padding:18px}.presentation-next{align-items:start;flex-direction:column}}@media(prefers-reduced-motion:reduce){.pointer-rings i{animation:none;opacity:.65;transform:scale(.35)}.pointer-rings i:nth-child(2){transform:scale(.65)}.pointer-rings i:nth-child(3){transform:scale(1)}}

/* Official tutorial phone crops keep their original proportions. */
.phone-window.route-screen{aspect-ratio:400/865;background:#000}.phone-window.route-screen>img{inset:0;width:100%;height:100%;object-fit:contain}

/* Opening narration reveals the design cards without moving the player. */
.design-reveal{opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .45s ease,transform .45s ease,visibility .45s}
.design-reveal[data-revealed="true"]{opacity:1;visibility:visible;transform:none}
.design-audio-panel{display:flex;align-items:center;gap:18px;padding:16px 20px;margin:0 0 24px;background:#fffdf6;border:1px solid var(--line);border-radius:9px;flex-wrap:wrap}
.design-audio-copy{display:flex;flex-direction:column;gap:3px;flex:1 1 210px;font-size:12px}
.design-audio-copy span{font-size:11px;color:var(--muted)}
.design-audio-panel audio{display:block;flex:2 1 290px;min-width:0;max-width:100%;height:44px}
.design-audio-panel .help-link{margin-top:0;white-space:nowrap}
#design-audio-error{font-size:11px;color:var(--muted)}
@media(max-width:600px){.design-audio-panel{gap:12px;padding:15px}.design-audio-panel audio{flex-basis:100%;width:100%}}
@media(prefers-reduced-motion:reduce){.design-reveal{transition:none;transform:none}}

/* The narrated learning model reveals one term at a time. */
.model-panel{margin:0 0 24px;padding:27px 28px 19px;background:#e8eddf;border-left:3px solid #7e977e;border-radius:5px;scroll-margin-top:24px}
.model-panel.design-reveal{transform:none}
.model-terms{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:0 0 22px;font:400 clamp(29px,4.2vw,49px)/1.15 'Instrument Serif',Georgia,serif;letter-spacing:-.4px}
.model-term{display:block;min-width:0;color:#153337}
.model-term:nth-child(2){color:#617b67}.model-term:nth-child(3){color:#8a650f}
.model-panel p{max-width:850px;font-size:15px;line-height:1.65;margin:0 0 17px}
.design-guidance,[data-reveal-anchor]{scroll-margin-top:24px}
@media(max-width:600px){.model-panel{padding:22px 20px 14px}.model-terms{grid-template-columns:1fr;gap:9px;font-size:38px;letter-spacing:0}.model-panel p{font-size:14px}}

/* The walkthrough navigation stays available across all section-two screens. */
.rail nav ol li{display:block;padding:0}.rail-step{display:flex;align-items:center;gap:10px;width:100%;padding:11px 0;border:0;background:transparent;color:inherit;text-align:left;font-size:12px;border-radius:5px}.rail-step:hover{background:#e8eddf}.rail-step[aria-current="step"]{font-weight:700;color:var(--ink)}.rail-step[aria-current="step"] b{background:var(--ink);color:white}
.task-heading{display:flex;align-items:flex-start;gap:16px;margin-bottom:10px}.task-heading h3{flex:1;min-width:0;margin:0}.hint-button{flex-shrink:0;display:inline-flex;align-items:center;gap:7px;min-height:42px;padding:9px 13px;border:1px solid #d5a832;background:#f6df9b;color:#263c36;border-radius:24px;font-size:12px;font-weight:700;box-shadow:0 2px 0 #d9bd72}.hint-button:hover{background:#f5ce6c}.hint-button svg{width:20px;height:20px}.hint-button:disabled{box-shadow:none}.feedback-location{font-size:11px;color:var(--muted);margin:13px 0 0}.learning-support{display:flex;justify-content:flex-end}.learning-support .help-link{margin-top:6px}
.choice-list{position:relative;padding-right:37px}.choice-arrow{position:absolute;right:0;top:var(--cue-first,12px);display:grid;place-items:center;width:30px;height:30px;color:var(--ink);background:#f5c45b;border-radius:50%;pointer-events:none;animation:choice-sweep 2.5s ease-in-out .6s 2 both}.choice-arrow svg{width:25px;height:25px}@keyframes choice-sweep{0%{top:var(--cue-first);opacity:0}12%{opacity:1}50%{top:var(--cue-last);opacity:1}88%{opacity:1}100%{top:var(--cue-first);opacity:0}}
@media(max-width:850px){.rail nav ol{gap:12px}.rail nav ol li{display:block}.rail-step{padding:5px 0}.rail .button{width:auto}}
@media(max-width:600px){.task-heading{flex-direction:column;gap:10px}.hint-button{align-self:flex-end}.rail-step{font-size:10px}.rail nav ol{gap:8px}.choice-list{padding-right:33px}.choice-arrow{width:27px;height:27px}.workspace .presentation h1{font-size:37px}}
@media(prefers-reduced-motion:reduce){.choice-arrow{animation:none;opacity:.85;top:var(--cue-first)}}

/* The scenario uses clean scene art rather than a cropped vehicle display. */
.beach-scene{background:#bedde7;aspect-ratio:4/3;height:auto;min-width:0}.beach-scene .scene-art{inset:0;width:100%;height:100%;max-width:100%;object-fit:cover;transform:none}.workspace .scenario-intro{gap:25px;grid-template-columns:1fr 1fr}.workspace .scenario-intro h1{font-size:clamp(38px,4.8vw,62px)}.choice.selected-action{border-color:#557963;background:#e4eddf;box-shadow:inset 3px 0 #557963}.workspace>section{min-width:0}@media(max-width:700px){.workspace .scenario-intro{grid-template-columns:1fr}.workspace .scenario-intro .beach-scene{width:100%;max-height:400px}.beach-scene .scene-art{object-fit:contain}}

/* Brief confirmations and replayable fourth-voice corrections. */
.feedback-confirmation{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:14px 0;color:#3b624b;font-size:13px;font-weight:600}.feedback-replay{display:inline-flex;align-items:center;border:1px solid #b6c3b3;border-radius:18px;background:transparent;color:var(--ink);font-size:11px;font-weight:400;padding:5px 10px}.feedback.wrong .feedback-replay{margin-top:10px;border-color:#c5aa70}.feedback-replay:hover{background:#ffffff80}

/* Reveal the variable results at the supplied review narration cues. */
.results-reveal{opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .4s ease,transform .4s ease}.results-reveal[data-revealed="true"]{opacity:1;visibility:visible;transform:none}.results-audio{margin-bottom:20px}.check-briefing{margin:-7px 0 20px;padding:10px 12px;border-radius:8px;background:#e8eddf}@media(prefers-reduced-motion:reduce){.results-reveal{transform:none;transition:none}}

.evidence-reveal{opacity:0;visibility:hidden;transform:translateY(7px);transition:opacity .4s ease,transform .4s ease}.evidence-reveal[data-revealed="true"]{opacity:1;visibility:visible;transform:none}.evidence-audio{margin:0 0 24px}.evidence-closing{font-size:17px;max-width:780px;margin:26px 0;color:var(--ink)}@media(prefers-reduced-motion:reduce){.evidence-reveal{transform:none;transition:none}}

/* Connect the evidence narration to the learner's actual results. */
.metric{transition:border-color .25s ease,background-color .25s ease,box-shadow .25s ease}.metric.result-reference{border-color:#c89425;background:#fff9e9;box-shadow:0 0 0 3px #e8b24440}

/* Closing invitations and proposed evaluation improvements. */
.evaluation-next{margin-top:24px;padding:23px 24px;background:#e8eddf;border-radius:8px}.evaluation-next h3,.demo-invitation h3{margin-bottom:8px}.evaluation-next p,.demo-invitation p{margin-bottom:0;max-width:770px}.demo-invitation{display:flex;align-items:center;justify-content:space-between;gap:28px;margin-top:30px;padding:25px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.demo-invitation .button{white-space:nowrap;flex-shrink:0}@media(max-width:650px){.demo-invitation{align-items:flex-start;flex-direction:column;gap:18px}.evaluation-next{padding:20px}}

.chapters{grid-template-columns:repeat(4,minmax(0,1fr))}.final-thoughts{max-width:960px}.final-intro{font-size:18px}.final-thoughts .evaluation-next{margin-top:28px}@media(max-width:650px){.chapters{grid-template-columns:repeat(2,minmax(0,1fr))}.chapters button span{font-size:12px;margin-left:5px}}

.final-reveal{opacity:0;visibility:hidden;transform:translateY(7px);transition:opacity .4s ease,transform .4s ease}.final-reveal[data-revealed="true"]{opacity:1;visibility:visible;transform:none}.evaluation-next p+p{margin-top:16px}@media(prefers-reduced-motion:reduce){.final-reveal{transform:none;transition:none}}

.owner-call{max-width:820px}.owner-call>h1{margin-bottom:28px}.owner-question{margin-top:24px}.owner-call .task{margin-top:24px}.owner-reference{margin-top:20px;padding:15px 18px;border:1px solid var(--line);border-radius:8px}.owner-reference summary{cursor:pointer;font-size:13px;font-weight:600}.owner-reference p{margin-top:12px;margin-bottom:0}.owner-correct{background:#e4eddf;border-left:3px solid #557963;padding:15px 18px;border-radius:5px}.owner-correct h4{margin:0 0 6px}.owner-correct p{margin:0}

.results-title{display:flex;align-items:center;gap:22px;margin:14px 0 23px}.results-title h1{margin:0}.completion-mark{display:grid;place-items:center;width:86px;height:86px;flex-shrink:0;color:#247445;border:3px solid #4b9163;border-radius:50%;background:#e0eddc}.completion-mark svg{width:58px;height:58px}@media(max-width:600px){.results-title{gap:15px}.completion-mark{width:64px;height:64px}.completion-mark svg{width:44px;height:44px}}@media(prefers-reduced-motion:reduce){.metric{transition:none}}

.final-thoughts>.eyebrow{display:block;margin-bottom:16px}

/* A dedicated welcome precedes the design explanation. */
.welcome-layout{display:grid;grid-template-columns:.9fr 1.1fr;align-items:center;gap:42px}.welcome-copy>.eyebrow{display:block;margin-bottom:17px;color:#617b67}.welcome-copy h1{font-size:clamp(60px,6.5vw,86px);margin-bottom:22px}.welcome-thanks{font-size:20px;line-height:1.45;max-width:420px}.welcome-copy .muted{font-size:16px;max-width:430px}.welcome-art{margin:0;overflow:hidden;border-radius:16px;background:#d7e3df}.welcome-art img{display:block;width:100%;height:auto;aspect-ratio:4/3;object-fit:cover}.welcome-audio-panel{display:flex;align-items:center;gap:20px;flex-wrap:wrap;padding:16px 20px;margin-top:27px;border:1px solid var(--line);border-radius:10px;background:#fffdf6}.welcome-audio-panel>div{min-width:180px}.welcome-audio-panel strong{display:block;font-size:13px}.welcome-audio-panel span{display:block;font-size:11px;color:var(--muted);margin-top:3px}.welcome-audio-panel audio{flex:1;min-width:240px;height:42px}.welcome-audio-panel .help-link{margin:0}@media(max-width:700px){.welcome-layout{grid-template-columns:1fr;gap:24px}.welcome-copy h1{font-size:64px}.welcome-thanks{font-size:18px;max-width:none}.welcome-copy .muted{max-width:none}.welcome-art{max-height:410px}.welcome-audio-panel{padding:16px;gap:14px}.welcome-audio-panel audio{width:100%;flex-basis:100%}}

.final-point{display:grid;grid-template-columns:minmax(0,1fr) 190px;gap:28px;align-items:center;padding:20px 0}.final-point+.final-point{border-top:1px solid #cbd5c5}.final-point h4{margin:0 0 8px;font-size:14px;color:#3e6552}.final-point img{display:block;width:190px;height:auto;aspect-ratio:4/3;object-fit:cover;border-radius:12px}.final-point p{margin:0}.final-thank-you{margin-top:26px;padding:26px 0 8px}.final-thank-you h2{margin-bottom:12px}.final-thank-you p{max-width:650px}.take-care{color:#617b67;font-size:20px}@media(max-width:600px){.final-point{grid-template-columns:1fr;gap:16px}.final-point img{width:min(100%,240px);justify-self:center}.final-point h4{font-size:15px}}

/* Editable visual storyboard for the expanded welcome. */
.welcome-visual{min-width:0}.welcome-story-nav{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;border:1px solid var(--line);border-radius:12px;padding:7px;margin-top:24px;background:#fffdf6}.welcome-story-nav button{display:flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:9px 6px;border:0;border-radius:7px;background:transparent;color:var(--muted);font-size:12px;font-weight:600}.welcome-story-nav button span{font-size:10px;font-weight:400}.welcome-story-nav button:hover{background:#e8eddf}.welcome-story-nav button[aria-selected="true"]{background:var(--ink);color:white}.welcome-visual:focus-visible{outline:3px solid #a05c00;outline-offset:4px;border-radius:16px}
.welcome-diagram{min-height:430px;display:flex;flex-direction:column;justify-content:center;position:relative;overflow:hidden;padding:30px;border:1px solid #cbd6c9;border-radius:16px;background:linear-gradient(145deg,#e8eddf,#f5f3e7)}.workflow-node{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:11px;text-align:center;border:1px solid #cbd6c9;border-radius:12px;background:#fffdf6;color:var(--ink);padding:15px 10px;min-width:0;font-size:12px;font-weight:600;line-height:1.25;animation:workflow-arrive .5s ease both}.workflow-node svg{display:block;width:36px;height:36px;flex-shrink:0;color:#4d715b}.collaboration-pair{display:grid;grid-template-columns:1fr 30px 1fr;align-items:center;gap:12px;max-width:350px;width:100%;margin:0 auto}.collaboration-pair .workflow-node{min-height:112px}.workflow-plus{color:#a97a17;text-align:center;font-size:28px}.ai-node{background:#fff1c8;border-color:#d8b663}.ai-node svg{color:#aa7813}.workflow-connector{height:34px;width:2px;background:#bc942c;position:relative;align-self:center;transform-origin:top;animation:connector-in .6s ease .3s both}.workflow-connector:after{content:'';position:absolute;bottom:-1px;left:-4px;border-left:5px solid transparent;border-right:5px solid transparent;border-top:7px solid #bc942c}.production-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px}.production-grid .workflow-node{min-height:105px;font-size:11px;padding:12px 6px}.production-grid .workflow-node:nth-child(2),.possibility-grid .workflow-node:nth-child(2){animation-delay:.15s}.production-grid .workflow-node:nth-child(3),.possibility-grid .workflow-node:nth-child(3){animation-delay:.3s}.production-grid .workflow-node:nth-child(4){animation-delay:.45s}.workflow-caption{font-size:12px;color:#617b67;text-align:center;margin:25px 0 0}
.build-stages{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;align-items:center;gap:4px}.build-stages .workflow-node{min-height:100px;background:transparent;border:0;padding:10px 3px}.build-arrow{font-size:25px;color:#ab7b16;animation:arrow-pulse 2s ease-in-out infinite}.build-arrow:nth-child(4){animation-delay:.6s}.draft-window{width:100%;max-width:340px;background:#fffdf6;border:1px solid #adbfae;border-radius:11px;margin:24px auto 0;overflow:hidden;box-shadow:0 8px 18px #1936300c;animation:workflow-arrive .7s ease .5s both}.draft-window-bar{display:flex;gap:5px;padding:10px;background:#dbe4d5;border-bottom:1px solid #c3cfbf}.draft-window-bar i{height:5px;width:5px;border-radius:50%;background:#7c967e}.draft-window-content{display:flex;justify-content:center;gap:24px;padding:22px}.draft-device{height:104px;width:57px;border:3px solid #2f4e46;background:#dce9de;border-radius:12px;padding:7px}.draft-device span{display:block;width:20px;height:4px;background:#2f4e46;border-radius:4px;margin:0 auto 14px}.draft-device b{display:block;height:19px;background:#99b19a;margin-top:8px;border-radius:4px}.draft-device b:last-child{background:#e5bb5b}.draft-copy{padding-top:6px}.draft-copy>span{display:block;height:6px;width:85px;background:#d2ddce;margin:10px 0;border-radius:3px}.draft-copy>span:nth-child(2){width:65px}.draft-copy strong{display:block;font-size:10px;color:#45664f;margin-top:17px}
.design-foundation{max-width:280px;width:100%;margin:auto auto 0}.design-foundation .workflow-node{flex-direction:row;gap:14px;font-size:14px;padding:18px}.possibility-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.possibility-grid .workflow-node{min-height:124px}.possibilities-visual .workflow-caption{margin-bottom:auto}.improvement-cycle{display:grid;grid-template-columns:1fr 34px 1fr;grid-template-rows:105px 38px 105px;gap:8px;position:relative;max-width:350px;width:100%;margin:auto}.cycle-node:nth-child(1){grid-area:1/1;animation:cycle-emphasis 8s ease-in-out infinite}.cycle-node:nth-child(3){grid-area:1/3;animation:cycle-emphasis 8s ease-in-out 2s infinite}.cycle-node:nth-child(5){grid-area:3/1;animation:cycle-emphasis 8s ease-in-out 6s infinite}.cycle-node:nth-child(7){grid-area:3/3;animation:cycle-emphasis 8s ease-in-out 4s infinite}.cycle-arrow{align-self:center;justify-self:center;font-size:26px;color:#a97a17}.cycle-arrow-one{grid-area:1/2}.cycle-arrow-two{grid-area:2/3}.cycle-arrow-three{grid-area:3/2}.cycle-arrow-four{grid-area:2/1}.cycle-center{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:11px;line-height:1.3;color:#617b67;text-align:center}
.metric-explanation{font-size:10px;margin-top:10px;color:var(--muted)}.metric-explanation summary{cursor:pointer;text-decoration:underline;text-underline-offset:3px}.metric-explanation p{font-size:11px;line-height:1.5;color:var(--muted);margin:10px 0 0}
@keyframes workflow-arrive{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}@keyframes connector-in{from{transform:scaleY(0)}to{transform:scaleY(1)}}@keyframes arrow-pulse{0%,100%{opacity:.5;transform:translateX(-2px)}50%{opacity:1;transform:translateX(2px)}}@keyframes cycle-emphasis{0%,20%{background:#f9e7ad;border-color:#b9953f}25%,100%{background:#fffdf6;border-color:#cbd6c9}}
@media(max-width:700px){.welcome-diagram{min-height:360px;padding:23px}.welcome-story-nav button{font-size:11px;gap:5px}.production-grid{gap:6px}.production-grid .workflow-node{font-size:10px}.workflow-node svg{width:31px;height:31px}}
@media(max-width:450px){.welcome-story-nav{gap:3px;padding:5px}.welcome-story-nav button{flex-direction:column;gap:4px;font-size:10px;padding:7px 2px}.welcome-diagram{padding:18px}.possibility-grid{gap:7px}.possibility-grid .workflow-node{font-size:11px;padding:12px 6px}.production-grid .workflow-node{padding:12px 4px}}
@media(prefers-reduced-motion:reduce){.workflow-node,.workflow-connector,.build-arrow,.draft-window,.cycle-node{animation:none!important}}

/* Opening illustration yields to the first results card at its narration cue. */
.results-sequence{position:relative}.results-opening-visual{position:absolute;top:54px;left:0;width:100%;display:flex;flex-direction:column;align-items:center;pointer-events:none;opacity:1;visibility:visible;transition:opacity .35s ease,visibility .35s ease}.results-opening-visual[data-visible="false"]{opacity:0;visibility:hidden}.results-opening-visual svg{width:min(100%,640px);height:auto}.results-opening-visual p{font:400 28px/1.15 'Instrument Serif',Georgia,serif;color:#617b67;margin:0;text-align:center}.score-breakdown{font-size:11px;color:var(--muted);line-height:1.6;margin:9px 0 0}@media(max-width:600px){.results-opening-visual{top:76px}.results-opening-visual p{font-size:24px}}@media(prefers-reduced-motion:reduce){.results-opening-visual{transition:none}}

/* Keep every welcome panel in the same frame while the selected story changes. */
.welcome-copy{display:flex;flex-direction:column;justify-content:center}.welcome-visual{aspect-ratio:4/3;min-height:430px}.welcome-visual>.welcome-art,.welcome-visual>.welcome-diagram{height:100%;min-height:0}.welcome-visual>.welcome-art img{height:100%}@media(max-width:700px){.welcome-visual{min-height:360px}.welcome-visual>.welcome-art{max-height:none}}

/* Reserve the bottom-left continuation control's space through the welcome. */
.welcome-continue{min-height:46px;opacity:0;visibility:hidden;transition:opacity .3s ease}.welcome-continue[data-revealed="true"]{opacity:1;visibility:visible}@media(prefers-reduced-motion:reduce){.welcome-continue{transition:none}}

/* Numbers belong to the top-level chapters; local navigation uses labels. */
.rail-step{padding:11px 10px;border-left:3px solid transparent}.rail-step[aria-current="step"]{background:#e8eddf;border-left-color:#bd8a20}@media(max-width:850px){.rail-step{padding:7px 8px}}

/* The confirmation action presses the physical side button twice, from outside the phone. */
.side-press-hand{position:absolute;z-index:6;width:110px;height:96px;pointer-events:none;filter:drop-shadow(2px 4px 2px #0002);animation:customer-side-double-press 1.4s ease both}.side-press-hand svg{display:block;width:100%;height:100%}.side-button.customer-double-press{animation:physical-button-double-press 1.4s ease both}@keyframes customer-side-double-press{0%{opacity:0;transform:translateX(20px)}20%{opacity:1;transform:translateX(5px)}36%{opacity:1;transform:translateX(-3px)}49%{transform:translateX(5px)}65%{transform:translateX(-3px)}80%,100%{opacity:1;transform:translateX(0)}}@keyframes physical-button-double-press{0%,25%,45%,55%,76%,100%{transform:translateX(0);background:#6e8079}36%,65%{transform:translateX(-2px);background:#b99129}}@media(prefers-reduced-motion:reduce){.side-press-hand,.side-button.customer-double-press{animation:none}}

/* A direct gesture starts audible playback when browser autoplay is denied. */
.welcome-sound-prompt[hidden]{display:none}.welcome-sound-prompt{margin-top:8px}.welcome-sound-prompt p{font-size:13px;color:var(--muted);margin:10px 0 0}.welcome-sound-prompt .button{min-height:48px}

/* Keep the full wordmark and plain vector controls on small screens. */
.brand .brand-name{display:flex;align-items:center;gap:9px}.brand-name strong{font-size:12px;letter-spacing:1px;font-weight:700}.brand-name>span{font-size:9px;font-weight:500}
.ui-icon{display:inline-block;width:1em;height:1em;vertical-align:-.12em;flex-shrink:0}.masthead>a:last-child{display:inline-flex;align-items:center;gap:5px}
@media(max-width:850px){.brand .brand-name{flex-direction:column;align-items:flex-start;gap:1px}.brand-name>span{font-size:8px}}
@media(max-width:700px){.welcome-copy{justify-content:flex-start}.welcome-visual{width:100%}}
@media(max-width:600px){.masthead{gap:12px}.brand{gap:7px}.brand-name strong{font-size:11px}.brand-name>span{font-size:7px;letter-spacing:.6px}}

/* Preserve desktop symbols; use vectors only at the mobile/tablet breakpoint. */
.mobile-ui-icon{display:none}@media(max-width:850px){.mobile-ui-icon{display:inline-block}.desktop-ui-symbol{display:none}}