/* EXIST AI Learning Series — course experience
   Loaded after the legacy theme so the learning site can evolve without
   breaking older archived decks. */

:root{
  --course-ink:#17210f;
  --course-muted:#55624c;
  --course-green:#5da00e;
  --course-green-dark:#3f7509;
  --course-wash:#f1f7e9;
  --course-wash-2:#f8faf5;
  --course-line:#dce6d2;
  --course-blue:#255fb8;
  --course-amber:#9a6200;
  --course-red:#b63b32;
}

/* Slide composition */
.tpl-exist .course-slide{
  display:flex;
  flex-direction:column;
  justify-content:flex-start;
  padding:72px 96px 78px;
  background:#fff;
}
.tpl-exist .course-slide[hidden]{display:none!important}
.tpl-exist .course-slide.cover{
  justify-content:center;
  padding-inline:132px;
  background:
    radial-gradient(circle at 88% 18%,rgba(93,160,14,.12),transparent 27%),
    linear-gradient(180deg,#fff 0%,#fbfdf8 100%);
}
.tpl-exist .slide-top{
  display:flex;
  align-items:center;
  gap:22px;
  min-height:56px;
  margin-bottom:54px;
  color:var(--course-muted);
  font-size:18px;
  font-weight:650;
}
.tpl-exist .slide-top .brand-link{
  display:flex;
  align-items:center;
  gap:12px;
  color:var(--course-ink);
  text-decoration:none;
  white-space:nowrap;
}
.tpl-exist .slide-top img{width:190px;height:56px;object-fit:cover;object-position:center}
.tpl-exist .slide-top .rule{height:1px;flex:1;background:var(--course-line)}
.tpl-exist .slide-top .section-name{white-space:nowrap;color:var(--course-green-dark)}
.tpl-exist .slide-body{width:100%;max-width:1580px;margin:auto 0}
.tpl-exist .slide-foot{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:24px;
  min-height:30px;
  margin-top:auto;
  padding-top:28px;
  color:#66715e;
  font-size:18px;
}
.tpl-exist .slide-foot a{color:var(--course-green-dark);font-weight:700;text-decoration:none}

/* Large, presentation-safe typography. Nothing instructional is below 20px. */
.tpl-exist .course-slide .kicker{
  margin:0 0 14px;
  font-size:19px;
  line-height:1.3;
  letter-spacing:.12em;
  font-weight:800;
  color:var(--course-green-dark);
}
.tpl-exist .course-slide .h1{
  max-width:15ch;
  margin:0 0 28px;
  font-size:92px;
  line-height:1.02;
  letter-spacing:-.045em;
  text-wrap:balance;
}
.tpl-exist .course-slide .h2{
  max-width:22ch;
  margin:0 0 28px;
  font-size:62px;
  line-height:1.06;
  letter-spacing:-.035em;
  text-wrap:balance;
}
.tpl-exist .course-slide .lede{
  max-width:56ch;
  margin:0;
  font-size:30px;
  line-height:1.48;
  font-weight:430;
  color:var(--course-muted);
  text-wrap:pretty;
}
.tpl-exist .course-slide p,
.tpl-exist .course-slide li,
.tpl-exist .course-slide td{
  font-size:25px;
  line-height:1.48;
}
.tpl-exist .course-slide h3{font-size:34px;line-height:1.15;margin:0 0 12px}
.tpl-exist .course-slide h4{font-size:27px;line-height:1.2;margin:0 0 8px}
.tpl-exist .course-slide strong{color:var(--course-ink)}
.tpl-exist .course-slide code{
  padding:.08em .28em;
  border-radius:6px;
  background:#edf3e8;
  color:#274315;
  font-size:.9em;
}

/* Flat learning layouts */
.tpl-exist .split{
  display:grid;
  grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);
  gap:72px;
  align-items:center;
}
.tpl-exist .split.equal{grid-template-columns:repeat(2,minmax(0,1fr))}
.tpl-exist .metric-row{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:32px;
  margin-top:40px;
}
.tpl-exist .metric{
  padding-top:22px;
  border-top:5px solid var(--course-green);
}
.tpl-exist .metric .value{
  margin:0;
  font-size:70px;
  line-height:1;
  font-weight:830;
  letter-spacing:-.045em;
  color:var(--course-ink);
  font-variant-numeric:tabular-nums;
}
.tpl-exist .metric .label{margin:12px 0 0;color:var(--course-muted);font-size:23px;line-height:1.4}
.tpl-exist .sequence{
  display:grid;
  grid-template-columns:repeat(var(--count,4),minmax(0,1fr));
  gap:18px;
  margin-top:34px;
  counter-reset:course-step;
}
.tpl-exist .sequence .step{
  position:relative;
  min-height:190px;
  padding:28px 24px 24px;
  background:var(--course-wash-2);
  border-top:4px solid var(--course-green);
  counter-increment:course-step;
}
.tpl-exist .sequence .step::before{
  content:counter(course-step,decimal-leading-zero);
  display:block;
  margin-bottom:22px;
  color:var(--course-green-dark);
  font-size:18px;
  font-weight:800;
  letter-spacing:.1em;
}
.tpl-exist .sequence .step p{margin:0;color:var(--course-muted);font-size:22px}
.tpl-exist .plain-list{margin:24px 0 0;padding:0;list-style:none}
.tpl-exist .plain-list li{
  position:relative;
  padding:16px 0 16px 42px;
  border-bottom:1px solid var(--course-line);
}
.tpl-exist .plain-list li::before{
  content:"";
  position:absolute;
  inset:27px auto auto 5px;
  width:14px;
  height:14px;
  border-radius:50%;
  background:var(--course-green);
}
.tpl-exist .plain-list li:last-child{border-bottom:0}
.tpl-exist .comparison{
  width:100%;
  margin-top:28px;
  border-collapse:separate;
  border-spacing:0;
}
.tpl-exist .comparison th{
  padding:0 24px 14px 0;
  border-bottom:2px solid #afbf9f;
  color:var(--course-green-dark);
  font-size:18px;
  line-height:1.25;
  letter-spacing:.08em;
  text-align:start;
  text-transform:uppercase;
}
.tpl-exist .comparison td{
  padding:20px 28px 20px 0;
  border-bottom:1px solid var(--course-line);
  vertical-align:top;
  color:var(--course-muted);
}
.tpl-exist .comparison tr:last-child td{border-bottom:0}
.tpl-exist .comparison .good{color:#38770c;font-weight:800}
.tpl-exist .comparison .caution{color:var(--course-amber);font-weight:800}
.tpl-exist .comparison .stop{color:var(--course-red);font-weight:800}

/* Exercises */
.tpl-exist .practice{
  padding:34px 40px;
  background:var(--course-wash);
  border:2px solid #c8dbb5;
  border-radius:24px;
}
.tpl-exist .practice h3{color:var(--course-ink)}
.tpl-exist .practice .prompt{
  margin:12px 0 0;
  font-size:29px;
  line-height:1.42;
  color:var(--course-ink);
}
.tpl-exist .choice-row{
  display:grid;
  grid-template-columns:repeat(var(--count,3),minmax(0,1fr));
  gap:18px;
  margin-top:26px;
}
.tpl-exist .choice{
  min-height:112px;
  padding:22px 24px;
  background:#fff;
  border:1px solid #cad7bf;
  border-radius:16px;
  color:var(--course-ink);
  font-size:23px;
  font-weight:700;
}
.tpl-exist details.reveal{margin-top:24px}
.tpl-exist details.reveal summary{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:52px;
  padding:11px 20px;
  border:2px solid var(--course-green);
  border-radius:999px;
  background:#fff;
  color:var(--course-green-dark);
  cursor:pointer;
  font-size:20px;
  font-weight:800;
  list-style:none;
  transition:transform .16s ease-out,background-color .16s ease-out;
}
.tpl-exist details.reveal summary:hover{background:#f8fbf4}
.tpl-exist details.reveal summary:active{transform:scale(.96)}
.tpl-exist details.reveal summary::-webkit-details-marker{display:none}
.tpl-exist details.reveal summary::before{content:"+";font-size:26px;line-height:1}
.tpl-exist details.reveal[open] summary::before{content:"–"}
.tpl-exist .answer{
  margin-top:18px;
  padding:22px 26px;
  border-inline-start:5px solid var(--course-green);
  background:#fff;
  color:var(--course-muted);
}
.tpl-exist .answer p,.tpl-exist .answer li{font-size:22px}
.tpl-exist .answer p{margin:0}
.tpl-exist .answer ul{margin:10px 0 0}
.tpl-exist .practice:has(details.reveal[open]) > .comparison,
.tpl-exist .practice:has(details.reveal[open]) > .choice-row{display:none}

/* Demonstration and source treatments */
.tpl-exist .worked-example{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:26px;
  margin-top:30px;
}
.tpl-exist .example-pane{padding:28px 30px;background:var(--course-wash-2);border-radius:20px}
.tpl-exist .example-pane.before{border-top:5px solid #c58a24}
.tpl-exist .example-pane.after{border-top:5px solid var(--course-green)}
.tpl-exist .example-pane .label{margin:0 0 14px;color:var(--course-muted);font-size:18px;font-weight:800;letter-spacing:.1em;text-transform:uppercase}
.tpl-exist .example-pane p{margin:0;font-size:23px}
.tpl-exist .source-line{
  margin:28px 0 0;
  color:#697363;
  font-size:18px!important;
  line-height:1.45!important;
}
.tpl-exist .source-line a{color:var(--course-green-dark);text-decoration:underline;text-underline-offset:3px}
.tpl-exist .big-rule{
  margin-top:30px;
  padding:26px 30px;
  border-inline-start:6px solid var(--course-green);
  background:var(--course-wash);
  color:var(--course-ink);
  font-size:31px;
  line-height:1.35;
  font-weight:760;
}
.tpl-exist .tag-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}
.tpl-exist .tag{
  padding:9px 16px;
  border-radius:999px;
  background:var(--course-wash);
  color:var(--course-green-dark);
  font-size:18px;
  font-weight:800;
}

/* Mouse and touch navigation generated by runtime.js */
.deck-controls{
  position:fixed;
  right:18px;
  bottom:18px;
  z-index:35;
  display:flex;
  align-items:center;
  gap:8px;
  padding:8px;
  border:1px solid rgba(23,33,15,.12);
  border-radius:999px;
  background:rgba(255,255,255,.94);
  box-shadow:0 8px 28px rgba(23,33,15,.16);
  backdrop-filter:blur(10px);
}
.deck-controls button{
  min-width:46px;
  min-height:46px;
  border:0;
  border-radius:50%;
  background:var(--course-wash);
  color:var(--course-ink);
  cursor:pointer;
  font:800 20px/1 var(--font-sans);
  transition:transform .14s ease-out,background-color .14s ease-out;
}
.deck-controls button:hover{background:#e8f2dd}
.deck-controls button:active{transform:scale(.96)}
.deck-controls button:focus-visible{outline:3px solid #7fb43f;outline-offset:2px}
.deck-controls button:disabled{opacity:.35;cursor:default}
.deck-controls .deck-count{min-width:72px;text-align:center;color:var(--course-muted);font-size:15px;font-weight:800;font-variant-numeric:tabular-nums}

/* Resource library and homepage additions */
.resource-link{display:inline-flex;align-items:center;gap:8px;font-weight:800;color:var(--course-green-dark);text-decoration:none}
.resource-link:hover{text-decoration:underline}
.evidence-strip{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:18px;
  margin-top:28px;
}
.evidence-item{padding:20px 0;border-top:4px solid var(--course-green)}
.evidence-item b{display:block;font-size:34px;line-height:1;color:var(--course-ink)}
.evidence-item span{display:block;margin-top:8px;color:var(--course-muted);font-size:14px;line-height:1.4}
.resource-page{width:100%;height:auto;min-height:100vh;overflow:visible;display:block;background:#fff}
.resource-page .page-shell{max-width:1120px;margin:0 auto;padding:28px 34px 96px}
.resource-page .page-nav{display:flex;align-items:center;justify-content:space-between;padding:8px 0 44px}
.resource-page .page-nav img{width:150px;height:44px;object-fit:cover;object-position:center}
.resource-page .page-nav a{font-weight:750;color:var(--course-green-dark)}
.resource-page .page-nav a:focus-visible,.resource-page a:focus-visible{outline:3px solid #5da00e;outline-offset:4px;border-radius:6px}
.resource-page .page-hero{max-width:780px;padding:32px 0 54px}
.resource-page .page-hero h1{font-size:58px;line-height:1.04;letter-spacing:-.04em;margin:0 0 18px;text-wrap:balance}
.resource-page .page-hero p{font-size:20px;line-height:1.6;color:var(--course-muted);max-width:68ch}
.resource-page .resource-section{padding:46px 0;border-top:1px solid var(--course-line)}
.resource-page .resource-section h2{font-size:34px;line-height:1.15;margin:0 0 10px}
.resource-page .resource-section>.intro{max-width:70ch;margin:0 0 28px;color:var(--course-muted);font-size:17px;line-height:1.6}
.resource-page .template-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.resource-page .template{padding:26px 28px;border:1px solid var(--course-line);border-radius:20px;background:var(--course-wash-2)}
.resource-page .template h3{font-size:23px;margin:0 0 10px}
.resource-page .template p,.resource-page .template li{font-size:16px;line-height:1.55;color:var(--course-muted)}
.resource-page .template ol,.resource-page .template ul{margin:12px 0 0;padding-inline-start:22px}
.resource-page .source-list{display:grid;gap:16px;max-width:850px}
.resource-page .source-list a{font-weight:800;color:var(--course-green-dark)}
.resource-page .source-list p{margin:4px 0 0;color:var(--course-muted);font-size:15px;line-height:1.55}

@media (max-width:900px){
  .evidence-strip{grid-template-columns:repeat(2,1fr)}
  .resource-page .template-grid{grid-template-columns:1fr}
  .resource-page .page-hero h1{font-size:46px}
}

/* Portrait reader mode. The desktop deck keeps a fixed 16:9 canvas; on a
   phone, the active slide becomes a scrollable lesson so body copy never
   shrinks to thumbnail size. */
@media (max-width:700px) and (orientation:portrait){
  body.tpl-exist:not(.home):not(.resource-page){display:block;overflow:hidden}
  body.tpl-exist:not(.home):not(.resource-page) .deck{
    width:100vw!important;
    height:100vh!important;
    transform:none!important;
  }
  .tpl-exist .course-slide{
    width:100%;
    height:100%;
    padding:28px 24px 108px;
    overflow-y:auto;
    overscroll-behavior:contain;
  }
  .tpl-exist .course-slide.cover{padding-inline:28px;justify-content:flex-start;padding-top:96px}
  .tpl-exist .slide-top{min-height:30px;margin-bottom:34px;gap:10px;font-size:12px}
  .tpl-exist .slide-top .brand-link span{display:none}
  .tpl-exist .slide-top img{width:132px;height:40px}
  .tpl-exist .course-slide .kicker{font-size:13px;margin-bottom:10px}
  .tpl-exist .course-slide .h1{font-size:48px;max-width:11ch;margin-bottom:20px}
  .tpl-exist .course-slide .h2{font-size:39px;max-width:14ch;margin-bottom:22px}
  .tpl-exist .course-slide .lede{font-size:20px;line-height:1.55}
  .tpl-exist .course-slide p,
  .tpl-exist .course-slide li,
  .tpl-exist .course-slide td{font-size:18px}
  .tpl-exist .course-slide h3{font-size:25px}
  .tpl-exist .course-slide h4{font-size:20px}
  .tpl-exist .split,
  .tpl-exist .split.equal,
  .tpl-exist .worked-example,
  .tpl-exist .metric-row{grid-template-columns:1fr;gap:18px}
  .tpl-exist .sequence{grid-template-columns:1fr 1fr;gap:10px;margin-top:20px}
  .tpl-exist .sequence .step{min-height:150px;padding:18px 16px}
  .tpl-exist .sequence .step::before{margin-bottom:10px;font-size:13px}
  .tpl-exist .sequence .step p{font-size:16px}
  .tpl-exist .choice-row{grid-template-columns:1fr!important;gap:10px}
  .tpl-exist .choice{min-height:0;padding:16px;font-size:17px}
  .tpl-exist .practice{padding:20px;border-radius:18px}
  .tpl-exist .practice .prompt{font-size:20px}
  .tpl-exist details.reveal summary{font-size:16px;min-height:46px}
  .tpl-exist .answer p,.tpl-exist .answer li{font-size:16px}
  .tpl-exist .comparison{display:block;overflow-x:auto;font-size:16px}
  .tpl-exist .comparison th{font-size:12px;min-width:120px}
  .tpl-exist .comparison td{font-size:16px;min-width:150px;padding-block:14px}
  .tpl-exist .big-rule{font-size:21px;padding:18px 20px}
  .tpl-exist .source-line{font-size:13px!important}
  .tpl-exist .slide-foot{font-size:13px;padding-top:24px;align-items:flex-start}
  .tpl-exist .tag-row{gap:8px}
  .tpl-exist .tag{font-size:13px;padding:7px 11px}
  .tpl-exist .metric .value{font-size:54px}
  .tpl-exist .metric .label{font-size:18px}
  .deck-controls{right:50%;bottom:14px;transform:translateX(50%)}
}

@media print{
  .deck-controls{display:none!important}
  .tpl-exist .course-slide{padding:56px 72px!important}
  .resource-page .page-nav{display:none}
  .resource-page .template{break-inside:avoid}
}

@media (prefers-reduced-motion:reduce){
  .tpl-exist .slide,
  .deck-controls button,
  .tpl-exist details.reveal summary{transition:none!important}
}