:root{font-family:Inter,"SF Pro Display",system-ui,-apple-system,"Segoe UI",sans-serif;color:#e6eee9;background:#0c171b;color-scheme:dark;--bg:#0c171b;--panel:#142328;--panel2:#18292e;--edge:#30464a;--muted:#8ba3a1;--soft:#b6c4bb;--cream:#e4d5b9;--gold:#c39a63;--teal:#77bcb0;--cyan:#83cbd7;--orange:#e58a58;--red:#ed785a;--green:#85c49a}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:radial-gradient(ellipse at 42% -22%,#27403c 0,transparent 52%),radial-gradient(ellipse at 96% 90%,#222b27 0,transparent 40%),var(--bg)}body{min-height:100dvh;overflow:hidden;color:#e6eee9}.topbar{height:64px;padding:0 clamp(20px,4vw,64px);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #324447;background:#0a1518dd;backdrop-filter:blur(16px)}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#d8e4dc;font-size:12px;font-weight:700;letter-spacing:2.2px}.brand-mark{font-size:21px;color:var(--gold)}.brand small{display:block;color:#77918e;font-size:8px;letter-spacing:2px;font-weight:500;margin-top:4px}.top-right{display:flex;align-items:center;gap:24px}.deck-tag{font-size:10px;letter-spacing:.4px;color:#9eb1a8;padding:8px 12px;border:1px solid #35494a;border-radius:24px;background:#18302c55}.back-link{font-size:11px;color:#bbcbc3;text-decoration:none}.back-link span{color:var(--gold);margin-left:5px}.deck{width:min(1540px,100%);height:calc(100dvh - 64px);margin:auto;padding:clamp(14px,2vh,24px) clamp(20px,4vw,64px) 12px;display:flex;flex-direction:column}.slide-heading{min-height:92px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 2px 13px}.eyebrow{margin:0 0 8px;color:#91aaa3;font-size:9px;text-transform:uppercase;letter-spacing:2.4px}.slide-heading h1{font-size:clamp(25px,2.6vw,38px);line-height:1.13;letter-spacing:-.7px;margin:0;color:#e8e7d9;font-weight:580}.subtitle{margin:8px 0 0;color:#9fb1aa;font-size:clamp(11px,.95vw,13px);line-height:1.55}.page-number{align-self:flex-start;margin-top:7px;display:flex;gap:8px;align-items:center;color:#6c8582;font:11px ui-monospace,monospace}.page-number span:first-child{font-size:19px;color:#d2bd98}.page-number i{height:1px;width:23px;background:#566b66}.slide-body{flex:1;min-height:0;display:grid;grid-template-columns:minmax(0,1.54fr) minmax(320px,.84fr);gap:clamp(14px,2vw,25px)}.visual-card,.lesson-card{position:relative;min-height:0;border:1px solid #304348;border-radius:11px;background:linear-gradient(145deg,#1a2b2c,#122126 75%);box-shadow:0 20px 55px #030b0d45;overflow:hidden}.visual-card{display:flex;flex-direction:column}.visual-card:before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.2;background-image:linear-gradient(#9dbaaa0b 1px,transparent 1px),linear-gradient(90deg,#9dbaaa0b 1px,transparent 1px);background-size:24px 24px}.visual-head{position:relative;z-index:1;min-height:44px;padding:0 15px;display:flex;align-items:center;justify-content:space-between;gap:10px;border-bottom:1px solid #304348;color:#c1cec4;font-size:10px;letter-spacing:.3px}.visual-head>div:first-child{display:flex;align-items:center;gap:8px}.live-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#8dc2a0;box-shadow:0 0 12px #9bd7a5}.visual-head button{font:inherit;font-size:10px;color:#c5d3c9;background:#203338;border:1px solid #415657;border-radius:5px;padding:6px 9px;cursor:pointer}.visual-head button:hover,.visual-head button.active{background:#745d3b;border-color:#c39a63;color:#fff0d7}.canvas-wrap{position:relative;flex:1;min-height:190px;display:grid;place-items:center;padding:clamp(5px,1.2vw,15px)}canvas{width:100%;height:auto;max-height:100%;aspect-ratio:16/9;object-fit:contain;display:block}.visual-caption{position:relative;z-index:1;min-height:43px;padding:8px 14px;display:flex;align-items:center;gap:7px;border-top:1px solid #304348;color:#9bada5;font-size:10px;line-height:1.4}.caption-mark{color:var(--gold);font-size:15px}.visual-caption button{margin-left:auto;white-space:nowrap;color:#a8bbb1;background:transparent;border:0;font:inherit;font-size:10px;cursor:pointer}.visual-caption button span{font-size:14px;color:var(--gold);margin-left:3px}.visual-caption button:hover{color:#e8d5b4}.lesson-card{padding:clamp(16px,2vw,27px);overflow:auto;display:flex;flex-direction:column}.lesson-label{display:flex;align-items:center;justify-content:space-between;color:#8a9f98;font-size:9px;letter-spacing:1.4px;text-transform:uppercase}.lesson-label span:last-child{padding:5px 8px;border-radius:3px;background:#2a3832;color:#c9b48f;font-size:8px;letter-spacing:.8px}.lead{margin:18px 0 20px;color:#d4ded5;font-size:clamp(14px,1.22vw,17px);line-height:1.75;letter-spacing:.05px}.steps-title{display:flex;align-items:center;gap:10px;color:#c8d2c7;font-size:10px;letter-spacing:.6px}.steps-rule{height:1px;background:#3b4b48;flex:1}.steps{margin:14px 0 16px;padding:0;list-style:none;display:grid;gap:12px}.steps li{display:grid;grid-template-columns:22px 1fr;gap:9px;color:#aabbb1;font-size:clamp(11px,.9vw,12px);line-height:1.65}.steps li .step-no{width:21px;height:21px;display:grid;place-items:center;border:1px solid #50665e;border-radius:50%;font:9px ui-monospace,monospace;color:#ddc69e}.steps b{color:#d1dcd2;font-weight:600}.takeaway{margin-top:auto;display:grid;grid-template-columns:24px 1fr;gap:9px;padding:12px 13px;border:1px solid #435344;border-radius:7px;background:linear-gradient(115deg,#293329a8,#1d2925a8)}.takeaway-icon{color:#cfaa73;font-size:15px}.takeaway small{font-size:8px;letter-spacing:1.2px;color:#9eb1a1}.takeaway p{margin:5px 0 0;color:#e0d2b5;font-size:11px;line-height:1.6}.ask{margin-top:12px;padding:10px 12px;display:flex;align-items:flex-start;gap:10px;border-left:2px solid #79a9a3;background:#142326;color:#9db5af}.ask-icon{font-family:Georgia,serif;font-size:18px;color:#84b8aa}.ask p{margin:1px 0 0;font-size:10px;line-height:1.6}.answer-options{display:flex;gap:7px;margin-top:10px}.answer-options[hidden]{display:none}.answer-options button{flex:1;text-align:left;color:#bdcec4;background:#213439;border:1px solid #465a58;border-radius:5px;padding:9px;font:inherit;font-size:10px;line-height:1.5;cursor:pointer}.answer-options button:hover,.answer-options button:focus-visible{border-color:#d2ad75;background:#3a3a30}.answer-feedback{min-height:0;margin:6px 0 0;color:#99c9a8;font-size:10px;line-height:1.5}.answer-feedback:empty{display:none}.deck-controls{min-height:62px;display:flex;align-items:center;gap:20px}.nav-button,.fullscreen-button{color:#aabdaf;background:transparent;border:1px solid #3d5150;border-radius:5px;padding:9px 13px;font:inherit;font-size:10px;cursor:pointer;white-space:nowrap}.nav-button:hover,.fullscreen-button:hover{background:#203336;border-color:#708377;color:#e6e3d2}.nav-button:disabled{opacity:.32;cursor:default}.next-button{border-color:#8b734d;color:#e2cfac}.progress-cluster{flex:1;display:flex;align-items:center;gap:12px;min-width:100px}.progress-track{height:2px;flex:1;background:#314243;border-radius:3px;overflow:hidden}.progress-track i{display:block;height:100%;width:12.5%;background:linear-gradient(90deg,#789b8d,#d2af79);transition:width .35s ease}.slide-dots{display:flex;gap:5px}.slide-dots button{width:7px;height:7px;padding:0;border:0;border-radius:10px;background:#48605a;cursor:pointer;transition:all .25s}.slide-dots button.active{width:22px;background:#c0a270}.control-hints{display:flex;gap:10px;color:#758b83;font-size:9px;white-space:nowrap}.fullscreen-button{border-color:#44594f;color:#c5d3c6}.fullscreen-button span{margin-left:4px}.slide-body.fade-in{animation:appear .36s ease both}@keyframes appear{from{opacity:.3;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}
@media(max-height:760px) and (min-width:901px){.deck{padding-top:10px}.slide-heading{min-height:78px;padding-bottom:8px}.slide-heading h1{font-size:29px}.lead{margin:12px 0 12px;font-size:13px}.steps{gap:8px;margin:10px 0}.steps li{font-size:11px}.takeaway{padding:9px 11px}.lesson-card{padding:16px}.deck-controls{min-height:52px}}
@media(max-width:900px){body{overflow:auto}.deck{height:auto;min-height:calc(100dvh - 64px);padding:17px 18px 10px}.slide-heading{min-height:90px}.slide-body{grid-template-columns:1fr;flex:none}.visual-card{min-height:0}.canvas-wrap{min-height:unset}.lesson-card{overflow:visible;min-height:390px}.deck-controls{min-height:60px;gap:9px}.control-hints{display:none}.progress-cluster{gap:7px}.slide-dots{gap:3px}.slide-dots button{width:5px;height:5px}.slide-dots button.active{width:15px}}
@media(max-width:520px){.topbar{height:55px;padding:0 14px}.deck-tag{display:none}.brand{font-size:10px}.deck{min-height:calc(100dvh - 55px);padding:12px 12px 8px}.slide-heading{min-height:100px;align-items:flex-start;padding-top:5px}.slide-heading h1{font-size:25px}.subtitle{font-size:11px;max-width:88vw}.page-number{font-size:9px}.page-number span:first-child{font-size:16px}.page-number i{width:12px}.visual-head{padding:0 9px;font-size:9px}.visual-head button{font-size:9px;padding:5px}.visual-caption{padding:7px 9px;font-size:9px}.lesson-card{padding:17px;min-height:0}.lead{font-size:14px;margin:13px 0}.steps li{font-size:11px}.takeaway{margin-top:8px}.deck-controls{gap:6px}.nav-button{padding:8px 9px;font-size:9px}.nav-button span{display:none}.fullscreen-button{padding:8px 9px}.fullscreen-button span{display:none}.progress-cluster{gap:5px}}
.visual-card,.lesson-card{margin:0}.visual-card{padding:0}
body.is-fullscreen .topbar{height:48px}body.is-fullscreen .deck{height:calc(100dvh - 48px);padding-top:10px;padding-bottom:7px}body.is-fullscreen .slide-heading{min-height:78px}body.is-fullscreen .slide-heading h1{font-size:clamp(25px,2.4vw,34px)}body.is-fullscreen .slide-body{grid-template-columns:minmax(0,1.58fr) minmax(300px,.8fr)}body.is-fullscreen .deck-controls{min-height:48px}body.is-fullscreen .visual-card,body.is-fullscreen .lesson-card{box-shadow:0 24px 70px #0005}@media(max-width:900px){body.is-fullscreen .deck{height:auto}body.is-fullscreen .slide-body{grid-template-columns:1fr}}

/* Projector typography: canvas drawings stay in logical 960×540 units, while the
   backing bitmap is 2× and all embedded labels are scaled up for room readability. */
.topbar{height:72px}.brand{font-size:14px}.brand-mark{font-size:25px}.brand small{font-size:10px}.deck-tag,.back-link{font-size:13px}
.canvas-wrap{min-height:0;overflow:hidden}canvas{width:auto;height:auto;max-width:100%;max-height:100%;aspect-ratio:16/9;object-fit:contain}
.deck{height:calc(100dvh - 72px);padding-top:clamp(18px,2.6vh,30px);padding-bottom:15px}.slide-heading{min-height:124px;padding-bottom:17px}.eyebrow{font-size:13px;margin-bottom:10px}.slide-heading h1{font-size:clamp(34px,3vw,50px);letter-spacing:-.8px}.subtitle{font-size:clamp(16px,1.22vw,19px);line-height:1.55;margin-top:11px}.page-number{font-size:14px;gap:10px}.page-number span:first-child{font-size:25px}.page-number i{width:30px}
.visual-head{min-height:56px;padding:0 19px;font-size:14px}.live-dot{width:8px;height:8px}.visual-head button{font-size:13px;padding:8px 12px}.canvas-wrap{padding:clamp(10px,1.4vw,20px)}.visual-caption{min-height:58px;padding:11px 19px;font-size:14px;gap:10px}.caption-mark{font-size:20px}.visual-caption button{font-size:13px}.visual-caption button span{font-size:18px}
.lesson-card{padding:clamp(24px,2.5vw,38px)}.lesson-label{font-size:12px}.lesson-label span:last-child{font-size:11px;padding:6px 10px}.lead{font-size:clamp(19px,1.45vw,22px);line-height:1.72;margin:23px 0 25px}.steps-title{font-size:14px}.steps{gap:16px;margin:18px 0 22px}.steps li{grid-template-columns:28px 1fr;gap:12px;font-size:clamp(15px,1.08vw,17px);line-height:1.68}.steps li .step-no{width:27px;height:27px;font-size:11px}.takeaway{grid-template-columns:30px 1fr;gap:12px;padding:16px 17px}.takeaway-icon{font-size:20px}.takeaway small{font-size:11px}.takeaway p{font-size:15px;line-height:1.65}.ask{margin-top:16px;padding:14px 15px;gap:12px}.ask-icon{font-size:23px}.ask p{font-size:14px;line-height:1.65}.answer-options{gap:10px;margin-top:13px}.answer-options button{font-size:14px;padding:12px;line-height:1.55}.answer-feedback{font-size:13px;line-height:1.6}
.lesson-card.quiz-slide .takeaway{margin-top:12px}
.deck-controls{min-height:76px;gap:23px}.nav-button,.fullscreen-button{font-size:13px;padding:11px 16px}.progress-cluster{gap:15px}.progress-track{height:3px}.slide-dots{gap:7px}.slide-dots button{width:9px;height:9px}.slide-dots button.active{width:28px}.control-hints{font-size:12px;gap:13px}
@media(max-height:760px) and (min-width:901px){.deck{padding-top:12px}.slide-heading{min-height:98px;padding-bottom:10px}.slide-heading h1{font-size:clamp(31px,2.8vw,43px)}.subtitle{font-size:15px}.lead{font-size:17px;margin:12px 0 14px}.steps{gap:10px;margin:12px 0 14px}.steps li{font-size:14px}.lesson-card{padding:20px}.takeaway{padding:11px 13px}.ask{padding:10px 12px}.deck-controls{min-height:60px}}
@media(max-width:900px){.topbar{height:64px}.deck{height:auto;min-height:calc(100dvh - 64px);padding:18px 18px 12px}.slide-heading{min-height:110px}.slide-heading h1{font-size:clamp(30px,5vw,42px)}.subtitle{font-size:16px}.slide-body{grid-template-columns:1fr}.visual-head{min-height:52px}.lesson-card{padding:24px}.lead{font-size:19px}.steps li{font-size:16px}.deck-controls{min-height:68px}}
@media(max-width:520px){.topbar{height:58px;padding:0 14px}.brand{font-size:11px}.brand-mark{font-size:20px}.brand small{font-size:8px}.deck{min-height:calc(100dvh - 58px);padding:12px 12px 8px}.slide-heading{min-height:108px}.slide-heading h1{font-size:27px}.subtitle{font-size:14px}.page-number span:first-child{font-size:18px}.visual-head{min-height:43px;padding:0 9px;font-size:10px}.visual-head button{font-size:10px;padding:6px 8px}.canvas-wrap{padding:6px}.visual-caption{min-height:47px;padding:8px 9px;font-size:11px}.visual-caption button{font-size:10px}.lesson-card{padding:18px}.lesson-label{font-size:10px}.lesson-label span:last-child{font-size:9px}.lead{font-size:16px;margin:14px 0}.steps-title{font-size:12px}.steps{gap:11px;margin:13px 0 16px}.steps li{grid-template-columns:24px 1fr;gap:9px;font-size:13px}.steps li .step-no{width:23px;height:23px;font-size:9px}.takeaway{padding:12px}.takeaway p{font-size:13px}.ask{padding:11px}.ask p{font-size:12px}.answer-options button{font-size:12px;padding:9px}.answer-feedback{font-size:11px}.deck-controls{min-height:57px;gap:6px}.nav-button,.fullscreen-button{font-size:10px;padding:8px 9px}.control-hints{display:none}.progress-cluster{gap:6px}.slide-dots{gap:4px}.slide-dots button{width:6px;height:6px}.slide-dots button.active{width:17px}}
body.is-fullscreen .topbar{height:56px}body.is-fullscreen .deck{height:calc(100dvh - 56px);padding-top:12px;padding-bottom:8px}body.is-fullscreen .slide-heading{min-height:100px}body.is-fullscreen .slide-heading h1{font-size:clamp(36px,3vw,48px)}body.is-fullscreen .subtitle{font-size:clamp(16px,1.2vw,19px)}body.is-fullscreen .lesson-card{padding:clamp(25px,2.8vw,42px)}body.is-fullscreen .lead{font-size:clamp(20px,1.52vw,23px)}body.is-fullscreen .steps li{font-size:clamp(16px,1.12vw,18px)}body.is-fullscreen .deck-controls{min-height:58px}
@media(max-width:900px){body.is-fullscreen .deck{height:auto}body.is-fullscreen .slide-body{grid-template-columns:1fr}}
@media(max-width:520px){body.is-fullscreen .topbar{height:58px}body.is-fullscreen .deck{height:auto}body.is-fullscreen .slide-heading h1{font-size:27px}}
@media(max-height:850px) and (min-width:901px){
  .topbar{height:54px}.deck{height:calc(100dvh - 54px);padding:7px 4vw 5px}.slide-heading{min-height:86px;padding-bottom:7px}.eyebrow{font-size:10px;margin-bottom:6px}.slide-heading h1{font-size:clamp(31px,2.7vw,40px)}.subtitle{font-size:14px;margin-top:6px}
  .visual-head{min-height:44px;padding:0 14px}.visual-head button{font-size:11px;padding:6px 9px}.canvas-wrap{padding:8px}.visual-caption{min-height:40px;padding:7px 12px;font-size:12px}.visual-caption button{font-size:11px}
  .lesson-card{padding:18px}.lesson-label{font-size:10px}.lesson-label span:last-child{font-size:9px}.lead{font-size:16px;line-height:1.6;margin:12px 0 14px}.steps-title{font-size:12px}.steps{gap:10px;margin:11px 0 13px}.steps li{grid-template-columns:23px 1fr;gap:9px;font-size:14px;line-height:1.5}.steps li .step-no{width:22px;height:22px;font-size:9px}.takeaway{grid-template-columns:23px 1fr;gap:8px;padding:10px 12px}.takeaway-icon{font-size:16px}.takeaway small{font-size:9px}.takeaway p{font-size:12px;line-height:1.5}.ask{margin-top:10px;padding:9px 11px;gap:8px}.ask-icon{font-size:18px}.ask p{font-size:12px;line-height:1.5}.answer-options{gap:7px;margin-top:8px}.answer-options button{font-size:11px;padding:8px;line-height:1.4}.answer-feedback{font-size:11px}.lesson-card.quiz-slide .takeaway{margin-top:8px}
  .deck-controls{min-height:49px;gap:14px}.nav-button,.fullscreen-button{font-size:11px;padding:8px 11px}.progress-cluster{gap:9px}.control-hints{font-size:10px;gap:9px}
}
.visual-caption>#visual-caption{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}
.steps li{margin-left:-7px;padding:4px 7px;border-radius:6px;opacity:.72;transition:background .25s ease,color .25s ease,opacity .25s ease}
.steps li.is-current{opacity:1;color:#e2e8dc;background:#263734;box-shadow:inset 2px 0 #c39a63}
.steps li.is-current .step-no{background:#775f3f;border-color:#c39a63;color:#fff0d7;box-shadow:0 0 12px #c39a6333}
.steps li.is-done{opacity:.48}
.stage-tools{display:flex;align-items:center;gap:4px;white-space:nowrap;flex:none}
.stage-tools button{width:25px;height:25px;padding:0;display:grid;place-items:center;border:1px solid #405654;border-radius:5px;background:#1c3033;color:#d4dfd5;font-family:inherit;font-size:17px;font-weight:700;line-height:1;cursor:pointer}
.stage-tools button:hover{border-color:#c39a63;color:#f2dfbd;background:#2b3934}
.stage-tools button:disabled{opacity:.35;cursor:default}
#stage-label{min-width:112px;color:#b6c6ba;font-size:10px;font-variant-numeric:tabular-nums}
.visual-caption #replay{margin-left:2px;padding-left:6px}
@media(max-width:1100px) and (min-width:901px){#stage-label{min-width:84px;font-size:9px}.visual-caption{gap:5px}.stage-tools{gap:2px}.stage-tools button{width:22px;height:22px}}
@media(max-width:650px){.visual-caption>#visual-caption{display:none}.visual-caption{justify-content:flex-end}.stage-tools{margin-left:auto}#stage-label{min-width:92px;font-size:9px}}