/* ============================================================
   CollabInbox course deck — cloud-studio design system
   Stage: fixed 1280×720 logical, scaled to viewport.
   Tokens per cloud-studio colors_and_type.css + the deck-only
   mapping in the storyboard "Design mapping" annex.
   ============================================================ */

:root{
  --paper:#FAF8F3;
  --surface:#FFFFFF;
  --ink:#1B1A16;
  --muted:#6A675E;
  --faint:#9A968B;

  --line:rgba(27,26,22,.12);
  --line-soft:rgba(27,26,22,.07);
  --grid-line:rgba(27,26,22,.028);  /* deck-only: fainter than web --line-soft — projectors amplify it */

  --accent:#1E4FA8;
  --accent-tint:#ECF0FA;
  --accent-line:rgba(30,79,168,.22);
  --accent-ink:#1A3B73;

  --ok:#2E7D52;
  --ok-tint:#E9F2EC;
  --ok-line:rgba(46,125,82,.25);
  --ok-ink:#1F5238;

  /* deck-only: pain/bad — never a second accent */
  --pain:#9C4A3C;
  --pain-tint:#F6ECE9;
  --pain-line:rgba(156,74,60,.25);

  /* instructor-facing warn (fallback flags) */
  --warn:#8A5A12;
  --warn-tint:#FBF3E4;
  --warn-line:rgba(138,90,18,.28);

  --serif:"Newsreader","Noto Serif Thai",Georgia,serif;
  --sans:"Hanken Grotesk","Sarabun",-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono","Sarabun",ui-monospace,monospace;

  /* type scale at 1280×720 stage */
  --fs-display:58px;   /* title slide */
  --fs-h1:44px;        /* divider headline */
  --fs-h2:36px;        /* slide headline */
  --fs-lede:23px;
  --fs-body:22px;
  --fs-card:19px;
  --fs-kw:18px;
  --fs-mono:15px;
  --fs-eyebrow:15px;
  --fs-label:13px;

  --r-card:12px;
  --r-btn:7px;
  --r-sm:6px;
  --grid:46px;

  --ease:cubic-bezier(.2,.7,.2,1);
  --dur:.7s;
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  background:var(--ink);
  font-family:var(--sans);
  color:var(--ink);
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
}

/* ---- stage & slides ---------------------------------------- */
.stage{
  position:fixed;left:50%;top:50%;
  width:1280px;height:720px;
  transform:translate(-50%,-50%) scale(var(--scale,1));
}
section.slide{
  position:absolute;inset:0;
  width:1280px;height:720px;
  padding:64px 92px 84px;
  background:
    linear-gradient(var(--grid-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-line) 1px,transparent 1px),
    var(--paper);
  background-size:calc(var(--grid)*2) calc(var(--grid)*2),calc(var(--grid)*2) calc(var(--grid)*2),auto;
  background-position:center top;
  display:none;
}
section.slide.current{display:block}

/* ---- shared typography ------------------------------------- */
.eyebrow{
  font-family:var(--mono);font-size:var(--fs-eyebrow);
  letter-spacing:.04em;color:var(--faint);text-transform:lowercase;
  margin-bottom:26px;
}
h1{font-family:var(--serif);font-weight:400;letter-spacing:-.01em;line-height:1.18;font-size:var(--fs-h1)}
h2{font-family:var(--serif);font-weight:400;letter-spacing:-.01em;line-height:1.22;font-size:var(--fs-h2);margin-bottom:30px}
.hero h2{font-size:40px}
.lede{font-size:var(--fs-lede);color:var(--muted);line-height:1.62;max-width:34em}
.kw{font-size:var(--fs-kw);color:var(--muted);line-height:1.6}
.kw b,.kw strong{color:var(--ink);font-weight:600}
.mono{font-family:var(--mono)}
.accent{color:var(--accent)}
.ok{color:var(--ok)}
.pain{color:var(--pain)}

ul.points{list-style:none;font-size:var(--fs-body);line-height:1.55}
ul.points li{
  padding:10px 0 10px 34px;position:relative;
}
ul.points li::before{
  content:"";position:absolute;left:8px;top:1.05em;
  width:9px;height:9px;border-radius:50%;
  background:var(--accent);opacity:.85;
}
ul.points b{font-weight:600}

/* mono command chip */
.cmd{
  display:inline-block;font-family:var(--mono);font-size:16px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-btn);padding:6px 14px;color:var(--accent-ink);
}
code{font-family:var(--mono);font-size:.9em;background:var(--accent-tint);
  border-radius:4px;padding:1px 7px;color:var(--accent-ink)}

/* tags */
.tag{
  display:inline-block;font-family:var(--mono);font-size:var(--fs-label);
  border:1px solid var(--line);border-radius:var(--r-sm);
  padding:4px 12px;color:var(--muted);margin-right:10px;letter-spacing:.03em;
}

/* cards */
.card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px 26px;
}
.card.tint-accent{background:var(--accent-tint);border-color:var(--accent-line)}
.card.tint-ok{background:var(--ok-tint);border-color:var(--ok-line)}
.card.tint-pain{background:var(--pain-tint);border-color:var(--pain-line)}
.card.tint-warn{background:var(--warn-tint);border-color:var(--warn-line)}

/* lucide icons */
.lucide,[data-lucide]{width:26px;height:26px;stroke-width:1.8;flex:none}

/* 01 / 02 / 03 numbering */
.stepnum{
  font-family:var(--mono);font-size:var(--fs-mono);color:var(--accent);
  letter-spacing:.05em;
}

/* status dot (title slide) */
.dot{position:relative;display:inline-block;width:10px;height:10px;border-radius:50%;
  background:var(--ok);vertical-align:1px;margin-right:9px}
.dot::after{content:"";position:absolute;inset:-1px;border:1px solid var(--ok);
  border-radius:50%;animation:pulse 2.4s var(--ease) infinite}
@keyframes pulse{0%{transform:scale(.6);opacity:.9}100%{transform:scale(1.9);opacity:0}}

/* ---- step fragments ----------------------------------------- */
[data-step]{opacity:0;transform:translateY(14px);
  transition:opacity var(--dur) ease,transform var(--dur) var(--ease)}
[data-step].on{opacity:1;transform:none}

/* ---- layout kinds ------------------------------------------- */

/* Title */
.s-title{display:none;padding-top:120px}
.s-title.current{display:flex}
.s-title{flex-direction:column}
.s-title .display{
  font-family:var(--serif);font-weight:500;font-size:var(--fs-display);
  letter-spacing:.005em;line-height:1.12;max-width:15em;
}
.s-title .lede{margin-top:26px}
.nameplate{
  margin-top:52px;width:520px;
  background:var(--surface);border:1px solid var(--line);border-radius:11px;
  padding:18px 24px;font-family:var(--mono);font-size:14px;
}
.nameplate .np-head{color:var(--faint);letter-spacing:.05em;margin-bottom:12px}
.nameplate .row{display:flex;justify-content:space-between;padding:5px 0;
  border-top:1px solid var(--line-soft)}
.nameplate .k{color:var(--faint)}
.nameplate .v{color:var(--ink)}

/* Divider */
.s-divider{padding-top:150px}
.s-divider h1{font-size:52px;max-width:18em}
.s-divider .timebox{font-family:var(--mono);font-size:var(--fs-mono);
  color:var(--faint);margin-top:20px}

/* Compare */
.compare{display:flex;gap:28px;margin-top:8px}
.compare .card{flex:1;padding:28px 30px}
.compare h4{font-family:var(--sans);font-weight:600;font-size:22px;margin-bottom:14px;
  display:flex;align-items:center;gap:12px}
.compare .tint-pain h4{color:var(--pain)}
.compare .tint-ok h4{color:var(--ok-ink)}
.compare p{font-size:var(--fs-card);line-height:1.65;color:var(--ink)}

/* Hands-on */
.s-handson .timer{
  float:right;font-family:var(--mono);font-size:var(--fs-mono);
  color:var(--accent-ink);background:var(--accent-tint);
  border:1px solid var(--accent-line);border-radius:20px;padding:6px 16px;
}
.steps{list-style:none;margin-top:6px}
.steps li{display:flex;gap:20px;align-items:baseline;padding:13px 0;
  border-top:1px solid var(--line-soft);font-size:var(--fs-body);line-height:1.5}
.steps li:first-child{border-top:none}

/* flow row (HTML boxes + arrows) */
.flow{display:flex;align-items:center;gap:0;margin:26px 0}
.flow .node{
  background:var(--surface);border:1px solid var(--line);border-radius:10px;
  padding:16px 22px;text-align:center;min-width:150px;
}
.flow .node .t{font-size:19px;font-weight:600}
.flow .node .t.mono{font-family:var(--mono);font-weight:500;font-size:16px}
.flow .node .d{font-size:14px;color:var(--muted);margin-top:5px}
.flow .node.hl-accent{background:var(--accent-tint);border-color:var(--accent);border-width:1.5px}
.flow .node.hl-accent .t{color:var(--accent-ink)}
.flow .node.hl-ok{background:var(--ok-tint);border-color:var(--ok);border-width:1.5px}
.flow .node.hl-ok .t,.flow .node.hl-ok .d{color:var(--ok-ink)}
.flow .node.hl-pain{background:var(--pain-tint);border-color:var(--pain);border-width:1.5px}
.flow .node.hl-pain .t,.flow .node.hl-pain .d{color:var(--pain)}
.flow .arrow{
  flex:none;width:44px;height:2px;background:var(--faint);position:relative;margin:0 2px;
}
.flow .arrow::after{content:"";position:absolute;right:-1px;top:-4px;
  border-left:9px solid var(--faint);border-top:5px solid transparent;border-bottom:5px solid transparent}

/* Key message */
.s-key{display:none;align-items:center;justify-content:center;text-align:center}
.s-key.current{display:flex}
.s-key .statement{font-family:var(--serif);font-size:46px;line-height:1.3;max-width:18em}

/* Output checklist */
.checklist{list-style:none;font-size:var(--fs-body)}
.checklist li{display:flex;gap:16px;align-items:center;padding:12px 0;
  border-top:1px solid var(--line-soft)}
.checklist li:first-child{border-top:none}
.checklist .lucide{color:var(--ok)}

/* ---- chrome (outside stage scale) ---------------------------- */
.chrome{
  position:fixed;left:0;right:0;bottom:0;height:44px;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 22px;font-family:var(--mono);font-size:12.5px;color:#8d897d;
  pointer-events:none;z-index:5;
}
.chrome .hint{opacity:.55}

/* ---- notes overlay ------------------------------------------- */
aside.notes{display:none}
.notesbar{
  position:fixed;left:0;right:0;bottom:0;max-height:34vh;overflow:auto;
  background:rgba(27,26,22,.94);color:#EDEAE1;z-index:9;
  padding:18px 28px 24px;font-size:16px;line-height:1.65;
  border-top:2px solid var(--accent);display:none;
}
.notesbar b{color:#F3C989}
body.shownotes .notesbar{display:block}

/* ---- overview grid -------------------------------------------- */
body.overview{overflow:auto;background:var(--ink)}
body.overview .stage{
  position:static;transform:none;width:auto;height:auto;
  display:grid;grid-template-columns:repeat(4,308px);gap:18px;padding:26px;
}
body.overview section.slide{
  display:block;position:relative;inset:auto;
  transform:scale(.2333);transform-origin:top left;
  cursor:pointer;
}
body.overview .cell{width:308px;height:178px;overflow:hidden;border-radius:6px;
  outline:1px solid rgba(255,255,255,.14)}
body.overview .cell.cur{outline:2px solid var(--accent)}
body.overview [data-step]{opacity:1;transform:none}
body.overview .chrome,body.overview .notesbar{display:none}

/* ============================================================
   Bespoke animation: M1-5 context window
   ============================================================ */
.cw-wrap{margin-top:34px;position:relative;height:400px}
.cw-frame{
  position:absolute;left:150px;top:36px;width:940px;height:150px;
  border:2px solid var(--accent);border-radius:14px;background:rgba(255,255,255,.55);
}
.cw-frame .cw-title{
  position:absolute;top:-30px;left:0;font-family:var(--mono);
  font-size:14px;color:var(--accent);letter-spacing:.04em;
}
.cw-track{position:absolute;inset:0;display:flex;align-items:center;gap:14px;padding:0 20px;overflow:hidden}
.cw-chip{
  flex:none;width:165px;padding:16px 10px;text-align:center;overflow:hidden;
  white-space:nowrap;
  background:var(--surface);border:1px solid var(--line);border-radius:9px;
  font-size:17px;transition:opacity var(--dur) ease,transform var(--dur) var(--ease),
    border-color var(--dur) ease,background var(--dur) ease,
    width var(--dur) var(--ease),padding var(--dur) var(--ease),
    margin-left var(--dur) var(--ease),border-width var(--dur) ease;
}
.cw-chip .sub{display:block;font-family:var(--mono);font-size:11.5px;color:var(--faint);margin-top:4px}
.cw-chip.new{background:var(--ok-tint);border-color:var(--ok-line)}
/* step 1: new message slides in */
#m1-5 .cw-e{opacity:0;transform:translateX(80px)}
#m1-5.at1 .cw-e{opacity:1;transform:none}
/* step 2: oldest falls out of the frame, others slide left to fill */
#m1-5.at2 .cw-a{opacity:0;transform:translateX(-140px);
  width:0;padding-left:0;padding-right:0;margin-left:-14px;border-width:0}
.cw-ghost{
  position:absolute;left:-24px;top:72px;width:190px;padding:14px 10px;text-align:center;
  background:var(--pain-tint);border:1px dashed var(--pain-line);border-radius:9px;
  color:var(--pain);font-size:16px;opacity:0;transform:translateX(120px);
  transition:opacity var(--dur) ease .25s,transform var(--dur) var(--ease) .25s;
}
.cw-ghost .sub{display:block;font-family:var(--mono);font-size:11.5px;margin-top:4px;opacity:.75}
#m1-5.at2 .cw-ghost{opacity:1;transform:none}
/* steps 3–4: question + hallucinated answer */
.cw-chat{position:absolute;left:150px;top:214px;width:940px;display:flex;flex-direction:column;gap:12px}
.cw-q,.cw-ans{max-width:560px;border-radius:12px;padding:12px 20px;font-size:18px;line-height:1.5}
.cw-q{align-self:flex-end;background:var(--accent-tint);border:1px solid var(--accent-line);color:var(--accent-ink)}
.cw-ans{align-self:flex-start;background:var(--pain-tint);border:1px solid var(--pain-line);color:var(--pain)}
.cw-ans .lab{display:block;font-family:var(--mono);font-size:12px;letter-spacing:.05em;margin-top:6px;opacity:.8}

/* ============================================================
   Bespoke animation: M6-5 build cycle loop
   ============================================================ */
.bc-wrap{margin-top:30px;position:relative;height:330px}
.bc-row{display:flex;align-items:stretch;justify-content:center;gap:0;padding-top:26px}
.bc-card{
  width:280px;background:var(--surface);border:1.5px solid var(--line);
  border-radius:var(--r-card);padding:24px 22px;text-align:center;
  transition:border-color .5s ease,background .5s ease,transform .5s var(--ease);
}
.bc-card .cmd-t{font-family:var(--mono);font-size:17px;color:var(--accent-ink)}
.bc-card .d{font-size:15.5px;color:var(--muted);margin-top:8px}
.bc-card .stepnum{display:block;margin-bottom:10px}
.bc-arrow{flex:none;align-self:center;width:52px;height:2px;background:var(--faint);position:relative;margin:0 4px}
.bc-arrow::after{content:"";position:absolute;right:-1px;top:-4px;
  border-left:9px solid var(--faint);border-top:5px solid transparent;border-bottom:5px solid transparent}
.bc-card.c3{border-color:var(--ok-line);background:var(--ok-tint)}
.bc-card.c3 .cmd-t,.bc-card.c3 .d{color:var(--ok-ink)}
/* loop-back arc */
.bc-loop{position:absolute;left:calc(50% - 490px);top:150px;width:980px;height:120px}
.bc-loop path{stroke:var(--accent);stroke-width:2;fill:none;stroke-dasharray:6 7}
.bc-loop .head{fill:var(--accent)}
.bc-loop text{font-family:var(--mono);font-size:14px;fill:var(--accent)}
/* cycle pulse once loop revealed */
@keyframes bc-pulse{
  0%,26%{border-color:var(--accent);background:var(--accent-tint);transform:translateY(-2px)}
  33%,100%{border-color:var(--line);background:var(--surface);transform:none}
}
@keyframes bc-pulse-ok{
  0%,26%{border-color:var(--ok);background:var(--ok-tint);transform:translateY(-2px)}
  33%,100%{border-color:var(--ok-line);background:var(--ok-tint);transform:none}
}
#m6-5.at4 .bc-card.c1{animation:bc-pulse 5.4s var(--ease) infinite}
#m6-5.at4 .bc-card.c2{animation:bc-pulse 5.4s var(--ease) infinite 1.8s}
#m6-5.at4 .bc-card.c3{animation:bc-pulse-ok 5.4s var(--ease) infinite 3.6s}
/* dash crawl on the loop arc */
#m6-5.at4 .bc-loop path{animation:bc-dash 1.6s linear infinite}
@keyframes bc-dash{to{stroke-dashoffset:-26}}

/* ============================================================
   Bespoke: M1-4 tokenization chips
   ============================================================ */
.tokrow{display:flex;align-items:flex-start;gap:12px;margin:36px 0 6px}
.tok{font-family:var(--mono);font-size:19px;padding:12px 18px;border-radius:9px;
  background:var(--accent-tint);border:1px solid var(--accent-line);color:var(--accent-ink)}
.tok.whole{background:var(--ok-tint);border-color:var(--ok-line);color:var(--ok-ink)}
.tok-eq{font-size:19px;color:var(--muted);align-self:center;margin-left:10px}
.tok-group{display:flex;gap:12px;flex-direction:column}
.tok-group .chips{display:flex;gap:12px}
.tok-group .brace{border-top:1.5px solid var(--warn-line);margin-top:2px;padding-top:8px;
  font-family:var(--mono);font-size:13px;color:var(--warn);text-align:center}

/* ============================================================
   Bespoke animation: M5-3 agent loop
   ============================================================ */
.al-wrap{position:relative;height:388px;margin-top:16px}
.al-node{position:absolute;width:200px;padding:15px 0 13px;text-align:center;
  font-family:var(--mono);font-size:17px;letter-spacing:.07em;color:var(--ink);
  background:var(--surface);border:1.5px solid var(--line);border-radius:32px}
.al-node .d{font-family:var(--sans);font-size:13.5px;color:var(--muted);
  letter-spacing:0;margin-top:4px}
.al-node.hl-ok{background:var(--ok-tint);border-color:var(--ok);color:var(--ok-ink)}
.al-node.hl-ok .d{color:var(--ok-ink)}
.al-obs{left:calc(50% - 100px);top:0}
.al-act{left:calc(50% + 230px);top:158px}
.al-chk{left:calc(50% - 100px);top:314px}
.al-rep{left:calc(50% - 430px);top:158px}
.al-svg{position:absolute;left:calc(50% - 480px);top:0;width:960px;height:388px}
.al-svg path{stroke:var(--faint);stroke-width:2;fill:none}
.al-svg .head{fill:var(--faint);stroke:none}
#m5-3.at5 .al-svg path{stroke:var(--accent);stroke-dasharray:6 7;
  animation:bc-dash 1.6s linear infinite}
#m5-3.at5 .al-svg .head{fill:var(--accent)}

/* ============================================================
   Bespoke: M6-4 story status pipeline (progressive fill)
   ============================================================ */
.pillrow{display:flex;gap:14px;margin-top:34px}
.pill{flex:none;font-family:var(--mono);font-size:15px;padding:11px 24px;border-radius:24px;
  background:var(--surface);border:1px solid var(--line);color:var(--muted);
  transition:background var(--dur) ease,border-color var(--dur) ease,color var(--dur) ease}
#m6-4.at1 .pill.p1,#m6-4.at2 .pill.p2,#m6-4.at3 .pill.p3,#m6-4.at4 .pill.p4{
  background:var(--accent-tint);border-color:var(--accent);color:var(--accent-ink)}
#m6-4.at5 .pill.p5{background:var(--ok-tint);border-color:var(--ok);color:var(--ok-ink)}

/* ---- reduced motion ------------------------------------------ */
@media (prefers-reduced-motion:reduce){
  *,[data-step]{transition:none !important;animation:none !important}
}

/* ---- print ----------------------------------------------------- */
@media print{
  body{background:#fff;overflow:visible}
  .stage{position:static;transform:none;width:auto;height:auto}
  section.slide{display:block;position:relative;inset:auto;page-break-after:always}
  [data-step]{opacity:1 !important;transform:none !important}
  .chrome,.notesbar{display:none !important}
  #m1-5 .cw-e{opacity:1;transform:none}
}