:root{
  --paper:#F5F3EE;
  --paper-2:#FCFBF8;
  --card:#FFFFFF;
  --graphite:#22201E;
  --muted:#716B64;
  --soft:#E7E2DA;
  --soft-2:#EEEAE3;
  --orange:#F26419;
  --orange-soft:#FFF0E6;
  --green:#247A55;
  --green-soft:#E8F4EE;
  --blue:#2E628F;
  --blue-soft:#EAF1F7;
  --red:#A84039;
  --red-soft:#F8EAE8;
}

html,body{background:#E9E6E0;color:var(--graphite)}
body:before{
  background:
    linear-gradient(rgba(34,32,30,.025) 1px,transparent 1px),
    linear-gradient(90deg,rgba(34,32,30,.025) 1px,transparent 1px);
  background-size:32px 32px;
}

#deck{
  border:1px solid rgba(34,32,30,.08);
  background:var(--paper);
  box-shadow:0 28px 70px rgba(51,43,36,.18),0 2px 10px rgba(51,43,36,.08);
}

.slide,
.slide[data-n]{
  background:var(--paper);
  color:var(--graphite);
  padding:48px 70px 38px;
}

.slide:before{width:7px;background:var(--orange)}
.slide:not([data-n="1"]):after{
  content:attr(data-n);
  right:68px;
  top:33px;
  color:rgba(34,32,30,.045);
  font-size:80px;
}

.kicker{color:var(--orange);font-size:14px;letter-spacing:.14em}
h2{color:var(--graphite);font-size:44px;line-height:1.03;max-width:88%;margin-top:9px}
.lead{color:var(--muted);max-width:86%;font-size:20px;line-height:1.28;margin-top:10px}
.body{left:70px;right:70px;top:190px;bottom:78px}
.slide:is([data-n="2"],[data-n="12"],[data-n="17"],[data-n="20"],[data-n="24"],[data-n="25"]) .body{top:218px}
.fnote{left:70px;bottom:28px;color:var(--muted);font-size:15.5px;line-height:1.25}
.fnote i{background:var(--orange)}
.pn{right:70px;bottom:30px;color:#A39B91;font-size:14px}

/* Auditorium scale: all instructional copy remains readable from the back row. */
.st{padding:24px 25px 20px}
.st-v{font-size:48px}
.st-v em{font-size:18px}
.st-l{margin-top:12px;font-size:17px;line-height:1.3}
.cd{padding:22px 23px 19px}
.cd-l{margin-top:13px;font-size:20px;line-height:1.12}
.cd-t{margin-top:8px;font-size:16.5px;line-height:1.34}
.fl-l{font-size:18.5px}
.fl-s{font-size:15.5px;line-height:1.32}
.ly-n{font-size:16px}
.ly-l{font-size:18px;line-height:1.2}
.ly-s{font-size:16px;line-height:1.28}
.tb th{font-size:13px;padding-bottom:9px}
.tb td{padding:11px 10px 11px 0;font-size:17px;line-height:1.2}
.tb td.lim,
.fault td.cau,
.fault td.act{font-size:15.5px}
.cmp-i{padding:11px 0}
.cmp-i span{font-size:16.5px;line-height:1.32}
.ck span{font-size:17px}
.rl span{font-size:22px}

.slide[data-n="1"]{
  background:var(--paper);
}
.slide[data-n="1"]:before{background:var(--orange)}
.slide[data-n="1"]:after{
  content:"";
  position:absolute;
  right:0;
  top:0;
  width:45%;
  height:100%;
  background:
    linear-gradient(90deg,rgba(245,243,238,0),rgba(245,243,238,.15)),
    repeating-linear-gradient(0deg,transparent 0 31px,rgba(34,32,30,.035) 31px 32px),
    repeating-linear-gradient(90deg,transparent 0 31px,rgba(34,32,30,.035) 31px 32px);
}
.title-slide{padding:54px 60px 44px 68px;color:var(--graphite)}
.acad{color:var(--orange)}
.title-slide h1{
  color:var(--graphite);
  font-size:45px;
  line-height:1.03;
  max-width:61%;
  text-shadow:none;
  margin-top:30px;
}
.title-slide .lvl{color:var(--muted);margin-top:14px}
.title-slide .tfs{display:none}
.title-slide .hr{display:none}
.title-slide .hours{
  position:absolute;
  left:68px;
  bottom:43px;
  color:var(--orange);
  font-size:12px;
}
.title-journey{
  position:absolute;
  left:68px;
  right:70px;
  top:365px;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:12px;
  z-index:2;
}
.title-step{
  position:relative;
  min-height:112px;
  background:rgba(255,255,255,.8);
  border:1px solid var(--soft);
  border-radius:14px;
  padding:18px;
}
.title-step:not(:last-child):after{
  content:"";
  position:absolute;
  right:-13px;
  top:50%;
  width:13px;
  border-top:2px solid var(--orange);
}
.title-step b{display:block;font-size:13px;color:var(--orange);letter-spacing:.12em}
.title-step strong{display:block;margin-top:8px;font-size:21px;line-height:1.08}
.title-step span{display:block;margin-top:6px;color:var(--muted);font-size:14px;line-height:1.3}

.story-board{height:100%;display:flex;flex-direction:column;gap:16px}
.story-rail{display:grid;grid-template-columns:repeat(var(--count),1fr);gap:12px;flex:1;align-items:stretch}
.story-node{
  position:relative;
  min-width:0;
  background:var(--card);
  border:1px solid var(--soft);
  border-radius:14px;
  padding:18px 17px 16px;
  box-shadow:0 3px 12px rgba(47,39,33,.045);
}
.story-node:not(:last-child):after{
  content:"";
  position:absolute;
  z-index:3;
  right:-13px;
  top:31px;
  width:13px;
  border-top:2px solid var(--orange);
}
.story-node:not(:last-child):before{
  content:"";
  position:absolute;
  z-index:4;
  right:-13px;
  top:27px;
  width:7px;
  height:7px;
  border-top:2px solid var(--orange);
  border-right:2px solid var(--orange);
  transform:rotate(45deg);
}
.story-icon{
  width:34px;height:34px;
  display:grid;place-items:center;
  border-radius:10px;
  background:var(--orange-soft);
  color:var(--orange);
}
.story-icon svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.story-index{
  position:absolute;
  top:18px;
  right:16px;
  color:#B5ADA3;
  font:700 11px/1 ui-monospace,SFMono-Regular,Menlo,monospace;
}
.story-node h3{margin:14px 0 0;font-size:20px;line-height:1.1;color:var(--graphite)}
.story-node p{margin:7px 0 0;font-size:15.5px;line-height:1.3;color:var(--muted)}
.story-value{
  display:inline-block;
  margin-top:11px;
  padding:6px 8px;
  border-radius:7px;
  background:var(--soft-2);
  color:var(--graphite);
  font:700 14px/1 ui-monospace,SFMono-Regular,Menlo,monospace;
}
.story-callout{
  display:grid;
  grid-template-columns:auto 1fr;
  align-items:center;
  gap:12px;
  min-height:54px;
  padding:11px 16px;
  border-radius:12px;
  background:var(--orange-soft);
  border:1px solid #F6D4BD;
}
.story-callout b{color:var(--orange);font-size:13px;letter-spacing:.1em;text-transform:uppercase}
.story-callout span{color:#5E493B;font-size:16px;line-height:1.28}

.story-board.system .story-rail{
  grid-template-columns:1fr 1fr 1.15fr 1fr 1fr;
  align-items:center;
}
.story-board.system .story-node{min-height:196px}
.story-board.system .story-node:nth-child(3){
  background:var(--graphite);
  border-color:var(--graphite);
  color:white;
  transform:scale(1.04);
}
.story-board.system .story-node:nth-child(3) h3,
.story-board.system .story-node:nth-child(3) p{color:white}
.story-board.system .story-node:nth-child(3) .story-value{background:rgba(255,255,255,.12);color:white}

.story-board.decision .story-rail{
  grid-template-columns:1.05fr .85fr .85fr 1.05fr;
}
.story-board.decision .story-node:nth-child(1){background:var(--blue-soft);border-color:#C9D9E6}
.story-board.decision .story-node:nth-child(2),
.story-board.decision .story-node:nth-child(3){background:var(--paper-2)}
.story-board.decision .story-node:nth-child(4){background:var(--green-soft);border-color:#C8E2D5}

.story-board.warning .story-node:last-child{background:var(--red-soft);border-color:#E8C5C1}
.story-board.warning .story-callout{background:var(--red-soft);border-color:#E8C5C1}
.story-board.warning .story-callout b{color:var(--red)}

.story-board.loop .story-rail{grid-template-columns:repeat(var(--count),1fr)}
.story-board.loop .story-node:last-child:after{
  content:"↺";
  display:grid;
  place-items:center;
  width:30px;height:30px;
  border:2px solid var(--orange);
  border-radius:50%;
  color:var(--orange);
  right:14px;
  bottom:14px;
  top:auto;
  font-size:18px;
}

.story-board.metrics .story-node{text-align:left}
.story-board.metrics .story-value{
  display:block;
  width:max-content;
  margin-top:14px;
  background:var(--graphite);
  color:white;
  font-size:16px;
  padding:8px 10px;
}

#hud{
  background:rgba(255,255,255,.9);
  border:1px solid rgba(34,32,30,.12);
  box-shadow:0 8px 30px rgba(51,43,36,.14);
  color:var(--graphite);
}
#hud button{color:var(--muted)}
#hud button:hover{background:var(--soft-2);color:var(--graphite)}
#hud button.course-action{color:var(--orange);border-left-color:var(--soft)}
#pos{color:#958D84}
#hint{color:#928A81}

#notes{background:#FCFBF8;border-left-color:var(--soft);color:var(--graphite)}
.note h3{color:var(--graphite)}
.nk,.note b{color:var(--orange)}
.note p{color:#4E4944}
#ov{background:rgba(245,243,238,.97)}
.nv{background:white;border-color:var(--soft);color:var(--graphite)}
.nv:hover{border-color:var(--orange);background:var(--orange-soft)}
.nv b{color:var(--orange)}

#lesson-tools{background:rgba(70,63,57,.35)}
.tool-card{background:var(--paper-2);border-color:var(--soft);color:var(--graphite);box-shadow:0 30px 90px rgba(51,43,36,.28)}
.tool-kicker{color:var(--orange)}
.tool-card h3{color:var(--graphite)}
.tool-card p{color:var(--muted)}
.tool-close{background:var(--soft-2);color:var(--graphite)}
.choice{background:white;border-color:var(--soft);color:var(--graphite)}
.choice:hover{background:var(--orange-soft);border-color:var(--orange)}
.choice.selected{border-color:var(--orange);box-shadow:inset 4px 0 var(--orange)}
.source-badge{border-color:var(--soft);color:var(--muted)}

@media (max-width:900px){
  .story-node p{font-size:14px}
  .story-node h3{font-size:18px}
}