/* A quiet academic canvas: questions, explanations, calculations, then conclusions. */
.lesson-slides{
  --deck-ink:#183044;
  --deck-blue:#257aaa;
  --deck-line:#dbe7ee;
  margin:25px 0 66px;
  border:1px solid #d9e6ee;
  border-radius:18px;
  background:#fff;
  box-shadow:0 20px 55px rgba(21,57,78,.08);
}
.lesson-slides .slides-toolbar{
  min-height:70px;
  padding:15px 26px;
  background:#fff;
  border-bottom:1px solid var(--deck-line);
}
.lesson-slides .slides-toolbar>div{gap:0}
.lesson-slides .slides-eyebrow{
  color:#5c91ad;
  font-size:11px;
  font-weight:650;
  letter-spacing:.08em;
}
.lesson-slides .slides-toolbar strong{
  color:var(--deck-ink);
  font-size:16px;
  font-weight:650;
}
.lesson-slides .slides-fullscreen{
  border:1px solid #d4e5ee;
  border-radius:8px;
  background:#f8fbfd;
  color:#315f7a;
  font-size:12px;
}
.lesson-slides .slides-fullscreen:hover{background:#eaf5fa}
.lesson-slides .slide-viewport{
  min-height:0;
  background:#fff;
  transition:height .32s ease;
}
.lesson-slides .slide-track{
  align-items:flex-start;
  transition:transform .36s cubic-bezier(.22,.61,.36,1);
}
.lesson-slides .lecture-slide,
.lesson-slides .lecture-slide:nth-child(4n+2),
.lesson-slides .lecture-slide:nth-child(4n+3){
  flex:0 0 100%;
  min-height:0;
  color:var(--deck-ink);
  background:#fff;
}
.lesson-slides .slide-page{
  min-height:560px;
  display:flex;
  flex-direction:column;
  padding:27px 44px 20px;
  background:
    radial-gradient(circle at 95% 8%,rgba(192,225,243,.20),transparent 28%),
    linear-gradient(90deg,#fff 0%,#fff 82%,#fbfdff 100%);
}
.lesson-slides .slide-kind-opener .slide-page{
  background:
    radial-gradient(circle at 89% 26%,rgba(169,216,242,.22),transparent 35%),
    linear-gradient(135deg,#fff,#f8fcfe 75%);
}
.lesson-slides .slide-kind-summary .slide-page{
  background:linear-gradient(135deg,#f7fbfe,#eef7fc);
}
.lesson-slides .slide-topline{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-bottom:13px;
  border-bottom:1px solid var(--deck-line);
  color:#6d8798;
  font-size:11px;
  line-height:1.4;
  letter-spacing:.03em;
}
.lesson-slides .slide-chapter{font-weight:650;color:#5385a0}
.lesson-slides .slide-section{max-width:60%;text-align:right}
.lesson-slides .slide-grid{
  display:grid;
  grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);
  align-items:center;
  gap:34px;
  flex:1;
  min-height:0;
  padding:28px 0 22px;
}
.lesson-slides .lecture-slide:not(.slide-has-aside) .slide-grid{grid-template-columns:minmax(0,1fr)}
.lesson-slides .slide-has-companion .slide-grid{
  flex:none;
  align-items:start;
  padding-bottom:17px;
}
.lesson-slides .slide-copy,
.lesson-slides .slide-aside{min-width:0}
.lesson-slides .slide-copy{z-index:auto}
.lesson-slides .slide-kicker{
  margin:0 0 13px;
  color:var(--deck-blue);
  font-size:11px;
  font-weight:700;
  letter-spacing:.10em;
}
.lesson-slides .slide-kicker:before{
  width:15px;
  height:2px;
  background:var(--deck-blue);
}
.lesson-slides .lecture-slide h3,
.lesson-slides .lecture-slide.lecture-slide-dark h3{
  max-width:24ch;
  margin:0 0 17px;
  color:#10293e;
  font-size:clamp(27px,2.6vw,36px);
  font-weight:690;
  line-height:1.32;
  letter-spacing:-.025em;
}
.lesson-slides .slide-kind-opener h3{
  max-width:22ch;
  font-size:clamp(34px,3.5vw,47px);
}
.lesson-slides .slide-lead,
.lesson-slides .lecture-slide-dark .slide-lead{
  margin:0 0 21px;
  padding:0 0 0 16px;
  border-left:3px solid #83bad8;
  color:#31566e;
  font-size:17px;
  font-weight:550;
  line-height:1.68;
}
.lesson-slides .slide-body{display:grid;gap:11px}
.lesson-slides .slide-body p{
  margin:0;
  color:#344c5b;
  font-size:16px;
  line-height:1.72;
}
.lesson-slides .slide-body strong{color:#173e58;font-weight:700}
.lesson-slides .slide-body code,
.lesson-slides .slide-example code,
.lesson-slides .slide-checkpoints code{
  padding:1px 4px;
  border-radius:4px;
  background:#e9f3f9;
  color:#235e82;
  font:inherit;
}
.lesson-slides .slide-dense .slide-body p{font-size:15.5px;line-height:1.66}
.lesson-slides .slide-equation,
.lesson-slides .example-formula{
  width:100%;
  max-width:100%;
  overflow-x:auto;
  margin:19px 0;
  padding:12px 15px;
  border-top:1px solid #dceaf2;
  border-bottom:1px solid #dceaf2;
  background:#f6fbfe;
  text-align:center;
}
.lesson-slides .slide-equation .katex-display,
.lesson-slides .example-formula .katex-display{margin:.25em 0}
.lesson-slides .slide-equation small{
  display:block;
  color:#607f92;
  font-size:11px;
  text-align:left;
}
.lesson-slides .slide-checkpoints{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:12px;
  margin-top:19px;
  padding-top:14px;
  border-top:1px solid #e3edf3;
}
.lesson-slides .slide-checkpoints>span{
  white-space:nowrap;
  color:#397c9e;
  font-size:11px;
  font-weight:700;
}
.lesson-slides .slide-checkpoints ul{
  display:grid;
  gap:5px;
  margin:0;
  padding-left:17px;
  color:#537084;
  font-size:12px;
  line-height:1.6;
}
.lesson-slides .slide-aside{
  align-self:center;
  display:flex;
  flex-direction:column;
  justify-content:flex-start;
  gap:16px;
  padding:3px 0 3px 25px;
  border-left:1px solid #dce8ef;
}
.lesson-slides .slide-has-companion .slide-aside{align-self:start}
.lesson-slides .slide-side-label{
  margin-bottom:12px;
  color:#24749f;
  font-size:11px;
  font-weight:700;
  letter-spacing:.07em;
}
.lesson-slides .slide-example{
  padding:19px 20px;
  border:1px solid #d6e7f0;
  border-radius:10px;
  background:#f7fbfe;
  color:#29485d;
}
.lesson-slides .slide-example p{
  margin:0;
  font-size:14px;
  line-height:1.65;
}
.lesson-slides .slide-example .example-context{margin-bottom:12px}
.lesson-slides .slide-example ol{
  display:grid;
  gap:10px;
  margin:0;
  padding:0;
  list-style:none;
  counter-reset:worked;
}
.lesson-slides .slide-example li{
  display:grid;
  grid-template-columns:22px 1fr;
  gap:2px 8px;
  margin:0;
  counter-increment:worked;
  color:#3f6175;
  font-size:14px;
  line-height:1.6;
}
.lesson-slides .slide-example li:before{
  content:counter(worked,decimal-leading-zero);
  color:#3b8fb8;
  font:11px/1.8 ui-monospace,SFMono-Regular,Consolas,monospace;
}
.lesson-slides .slide-example li strong{grid-column:2;color:#1e4d68;font-weight:650}
.lesson-slides .slide-example li span{grid-column:2}
.lesson-slides .slide-example .example-formula{
  grid-column:2;
  margin:5px 0;
  padding:6px 8px;
  background:white;
}
.lesson-slides .slide-example .example-result{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:9px;
  margin-top:14px;
  padding-top:11px;
  border-top:1px solid #dae9f1;
  color:#245877;
  font-weight:650;
}
.lesson-slides .example-result span{flex:none;color:#4c90af;font-size:11px}
.lesson-slides .slide-code{
  min-width:0;
  overflow:hidden;
  border:1px solid #24465c;
  border-radius:10px;
  background:#142c3d;
  box-shadow:0 10px 25px rgba(14,44,63,.11);
}
.lesson-slides .slide-code-head{
  display:flex;
  justify-content:space-between;
  gap:10px;
  padding:11px 15px;
  border-bottom:1px solid #345569;
  color:#afd0e0;
  font-size:12px;
  font-weight:700;
}
.lesson-slides .slide-code-head small{color:#76acc8;font:11px ui-monospace,SFMono-Regular,Consolas,monospace}
.lesson-slides .slide-code pre{
  max-width:100%;
  overflow:auto;
  margin:0;
  padding:16px 17px;
  color:#eef8fb;
  font:14px/1.65 ui-monospace,SFMono-Regular,Consolas,monospace;
  tab-size:2;
}
.lesson-slides .slide-code p{
  margin:0;
  padding:10px 15px 12px;
  border-top:1px solid #345569;
  color:#bcd3df;
  font-size:12px;
  line-height:1.6;
}
.lesson-slides .slide-visual{
  display:grid;
  gap:0;
  width:100%;
}
.lesson-slides .slide-visual .visual-node{
  position:relative;
  display:grid;
  grid-template-columns:29px 1fr;
  gap:0 10px;
  min-width:0;
  padding:13px 2px;
  border:0;
  border-top:1px solid #d9e7ee;
  border-radius:0;
  background:none;
  box-shadow:none;
}
.lesson-slides .slide-visual .visual-node:last-child{border-bottom:1px solid #d9e7ee}
.lesson-slides .slide-visual .visual-index{
  color:#3b89ae;
  font:11px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace;
}
.lesson-slides .slide-visual .visual-node strong{
  display:block;
  color:#1a4259;
  font-size:15px;
  line-height:1.5;
}
.lesson-slides .slide-visual .visual-node p{
  margin:3px 0 0;
  color:#617b8b;
  font-size:12px;
  line-height:1.5;
}
.lesson-slides .slide-visual .visual-value{
  display:block;
  color:#176894;
  font-size:22px;
  font-variant-numeric:tabular-nums;
  font-weight:680;
}
.lesson-slides .slide-visual-cards,
.lesson-slides .slide-visual-compare,
.lesson-slides .slide-visual-metric{grid-template-columns:repeat(2,minmax(0,1fr));gap:0 17px}
.lesson-slides .slide-visual-cards .visual-node,
.lesson-slides .slide-visual-compare .visual-node,
.lesson-slides .slide-visual-metric .visual-node{display:block;min-height:0}
.lesson-slides .slide-visual-metric .visual-node strong{font-size:12px}
.lesson-slides .slide-visual-metric .visual-value{font-size:24px}
.lesson-slides .slide-visual-table{min-width:0}
.lesson-slides .slide-table-wrap{
  max-height:none;
  overflow:auto;
  border:0;
  border-top:2px solid #83b5d1;
  border-radius:0;
  background:transparent;
}
.lesson-slides .slide-table-wrap table{min-width:320px;font-size:13px}
.lesson-slides .slide-table-wrap th{
  color:#285b79;
  background:#eaf5fb;
  font-weight:700;
}
.lesson-slides .slide-table-wrap th,
.lesson-slides .slide-table-wrap td{padding:8px 9px;border-bottom:1px solid #dce9f0}
.lesson-slides .slide-companion{
  margin:0 0 18px;
  padding:15px 0 2px;
  border-top:1px solid #dce8ef;
}
.lesson-slides .slide-companion .slide-visual-flow,
.lesson-slides .slide-companion .slide-visual-cards,
.lesson-slides .slide-companion .slide-visual-compare,
.lesson-slides .slide-companion .slide-visual-metric{
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:10px 18px;
}
.lesson-slides .slide-companion .slide-visual .visual-node{
  border-bottom:1px solid #d9e7ee;
}
.lesson-slides .slide-companion .slide-table-wrap table{min-width:max-content}
.lesson-slides .slide-companion .slide-table-wrap th,
.lesson-slides .slide-companion .slide-table-wrap td{font-size:14px;padding:10px 12px}
.lesson-slides .slide-takeaway{
  display:grid;
  grid-template-columns:auto 1fr;
  align-items:start;
  gap:13px;
  margin:0 0 17px;
  padding:13px 16px;
  border-left:3px solid #5a9fc1;
  background:#edf7fc;
}
.lesson-slides .slide-reading{
  display:flex;
  align-items:baseline;
  gap:14px;
  margin:1px 0 15px;
  padding:11px 0 0;
  border-top:1px solid #e1eaf0;
  color:#647f90;
  font-size:12px;
  line-height:1.6;
}
.lesson-slides .slide-reading>span{
  flex:none;
  color:#437e9d;
  font-weight:700;
}
.lesson-slides .slide-reading a,
.lesson-slides .slide-reading strong{
  color:#255f82;
  font-weight:650;
  text-decoration:none;
}
.lesson-slides .slide-reading a:hover{text-decoration:underline}
.lesson-slides .slide-reading p{margin:2px 0 0;color:#6c8492}
.lesson-slides .slide-takeaway span{
  white-space:nowrap;
  color:#3f83a5;
  font-size:11px;
  font-weight:700;
}
.lesson-slides .slide-takeaway strong{
  color:#274f67;
  font-size:14px;
  font-weight:640;
  line-height:1.6;
}
.lesson-slides .slide-footer{
  display:flex;
  justify-content:space-between;
  align-items:end;
  gap:16px;
  padding-top:11px;
  border-top:1px solid #e0e9ef;
  color:#8499a5;
  font-size:10px;
  line-height:1.4;
}
.lesson-slides .slide-footer span:last-child{
  flex:none;
  color:#4e7f9a;
  font:11px ui-monospace,SFMono-Regular,Consolas,monospace;
}
.lesson-slides .slides-controls{
  display:flex;
  align-items:center;
  gap:11px;
  min-height:62px;
  padding:11px 23px;
  border-top:1px solid var(--deck-line);
  background:#fff;
}
.lesson-slides .slides-prev,
.lesson-slides .slides-next{
  width:37px;
  height:37px;
  border-radius:8px;
  background:#f8fbfd;
}
.lesson-slides .slides-prev:hover:not(:disabled),
.lesson-slides .slides-next:hover:not(:disabled){background:#e7f3fa}
.lesson-slides .slides-counter{
  color:#3e7190;
  font-weight:650;
}
.lesson-slides .slides-current-section{
  margin-left:auto;
  color:#62869a;
  font-size:11px;
  white-space:nowrap;
  max-width:110px;
  overflow:hidden;
  text-overflow:ellipsis;
}
.lesson-slides .slides-progress{
  width:86px;
  height:3px;
  overflow:hidden;
  border-radius:3px;
  background:#dfebf1;
}
.lesson-slides .slides-progress span{
  display:block;
  width:0;
  height:100%;
  background:#3a8bb6;
  transition:width .25s;
}
.lesson-slides .slides-jump{
  width:200px;
  max-width:33%;
  min-width:90px;
  padding:7px 20px 7px 9px;
  border:1px solid #dae6ec;
  border-radius:7px;
  background:#fff;
  color:#42677e;
  font-size:11px;
  white-space:nowrap;
  text-overflow:ellipsis;
}
.lesson-slides:fullscreen{
  display:flex;
  flex-direction:column;
  margin:0;
  border:0;
  border-radius:0;
  background:#fff;
}
.lesson-slides.is-theatre{
  position:fixed;
  inset:0;
  z-index:1000;
  display:flex;
  flex-direction:column;
  width:100vw;
  height:100dvh;
  margin:0;
  border:0;
  border-radius:0;
  background:#fff;
}
.lesson-slides.is-theatre .slides-toolbar,
.lesson-slides.is-theatre .slides-controls{flex:none}
.lesson-slides.is-theatre .slide-viewport{flex:1;height:auto!important;overflow:hidden;display:flex}
.lesson-slides.is-theatre .slide-track{width:100%;height:100%}
.lesson-slides.is-theatre .lecture-slide{height:100%;overflow-y:auto}
.lesson-slides.is-theatre .slide-page{min-height:100%;padding:3.2vh 6vw 2vh}
.lesson-slides:fullscreen .slides-toolbar,
.lesson-slides:fullscreen .slides-controls{flex:none}
.lesson-slides:fullscreen .slide-viewport{
  flex:1;
  height:auto!important;
  overflow:hidden;
}
.lesson-slides:fullscreen .slide-track{height:100%}
.lesson-slides:fullscreen .lecture-slide{height:100%;overflow-y:auto}
.lesson-slides:fullscreen .slide-page{
  min-height:100%;
  padding:3.2vh 6vw 2vh;
}
.lesson-slides:fullscreen .slide-grid,
.lesson-slides.is-theatre .slide-grid{padding:2.3vh 7vw 1.6vh}
.lesson-slides:fullscreen .lecture-slide h3{font-size:clamp(36px,3vw,58px)}
.lesson-slides:fullscreen .slide-lead,
.lesson-slides.is-theatre .slide-lead{font-size:clamp(18px,1.3vw,23px);line-height:1.55}
.lesson-slides:fullscreen .slide-body p,
.lesson-slides.is-theatre .slide-body p{font-size:clamp(17px,1.1vw,20px);line-height:1.58}
.lesson-slides:fullscreen .slide-example li,
.lesson-slides.is-theatre .slide-example li{font-size:clamp(15px,.95vw,18px)}
.lesson-slides:fullscreen .slide-code pre{font-size:clamp(16px,1.15vw,21px)}
.lesson-slides:fullscreen .slide-companion .slide-table-wrap th,
.lesson-slides:fullscreen .slide-companion .slide-table-wrap td{font-size:clamp(16px,1.1vw,20px)}
@media(max-width:1100px){
  .lesson-slides .slide-page{padding-inline:33px}
  .lesson-slides .slide-grid{gap:27px}
  .lesson-slides .slide-aside{padding-left:18px}
}
@media(max-width:850px){
  .lesson-slides .slide-grid{grid-template-columns:1fr;gap:26px}
  .lesson-slides .slide-aside{align-self:stretch;border-left:0;border-top:1px solid #dce8ef;padding:18px 0 0}
  .lesson-slides .slide-page{min-height:0}
}
@media(max-width:760px){
  .lesson-slides{display:flex;flex-direction:column;margin:19px 0 45px;border-radius:14px;overflow:visible}
  .lesson-slides .slides-toolbar{min-height:62px;padding:11px 15px}
  .lesson-slides .slide-viewport{order:2}
  .lesson-slides .slides-toolbar strong{font-size:13px}
  .lesson-slides .slides-eyebrow{font-size:10px}
  .lesson-slides .slides-fullscreen{font-size:10px;padding:6px 8px}
  .lesson-slides .slide-page{min-height:0;padding:21px 20px 17px}
  .lesson-slides .slide-grid{
    display:block;
    min-height:0;
    padding:26px 0 20px;
  }
  .lesson-slides .lecture-slide h3,
  .lesson-slides .slide-kind-opener h3{font-size:27px}
  .lesson-slides .slide-lead{font-size:16px}
  .lesson-slides .slide-body p,
  .lesson-slides .slide-dense .slide-body p{font-size:15.5px;line-height:1.68}
  .lesson-slides .slide-aside{margin-top:23px}
  .lesson-slides .slide-companion .slide-table-wrap{overflow-x:auto}
  .lesson-slides .slide-companion .slide-table-wrap table{min-width:420px}
  .lesson-slides .slide-reading{display:block;font-size:12px}
  .lesson-slides .slide-reading>span{display:block;margin-bottom:4px}
  .lesson-slides .slide-example{padding:15px}
  .lesson-slides .slide-example p,
  .lesson-slides .slide-example li{font-size:14.5px}
  .lesson-slides .slide-code pre{font-size:12.5px}
  .lesson-slides .slide-checkpoints{grid-template-columns:1fr;gap:5px}
  .lesson-slides .slide-visual-cards,
  .lesson-slides .slide-visual-compare,
  .lesson-slides .slide-visual-metric{gap:0 12px}
  .lesson-slides .slide-takeaway{display:block;padding:11px 12px}
  .lesson-slides .slide-takeaway strong{display:block;margin-top:4px}
  .lesson-slides .slides-controls{
    order:1;
    position:sticky;
    top:76px;
    z-index:5;
    gap:7px;
    padding:9px 12px;
    border-top:0;
    border-bottom:1px solid var(--deck-line);
    box-shadow:0 8px 20px rgba(27,66,89,.08);
  }
  .lesson-slides .slides-prev,.lesson-slides .slides-next{width:32px;height:32px}
  .lesson-slides .slides-current-section{display:none}
  .lesson-slides .slides-progress{margin-left:auto;width:47px}
  .lesson-slides .slides-jump{width:95px;max-width:27%}
}
@media(max-width:420px){
  .lesson-slides .slide-page{padding-inline:17px}
  .lesson-slides .lecture-slide h3{font-size:25px}
  .lesson-slides .slide-visual .visual-node strong{font-size:12px}
  .lesson-slides .slide-footer span:first-child{max-width:80%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
}
@media(prefers-reduced-motion:reduce){
  .lesson-slides .slide-viewport,
  .lesson-slides .slide-track,
  .lesson-slides .slides-progress span{transition:none}
}
@media print{
  .lesson-slides{display:none!important}
}