/* Jack’s front presentation. Manila slip, iron ink. */
:root{
  --paper:#d9cb9e;
  --well:#cfc19a;
  --ink:#161814;
  --navy:#1e3a5f;
  --scarlet:#c41e3a;
  --dim:#7b8070;
  --font:"Courier New", Courier, "Lucida Console", monospace;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:var(--paper);color:var(--ink);
  font-family:var(--font);font-size:16px;line-height:1.5}
body{padding:28px 16px 5.8rem}
.always-on{margin:0 auto 1.4rem;max-width:36rem;justify-content:center}
button{font:inherit;color:inherit;background:var(--paper);border:1.5px solid var(--navy);
  border-radius:0;appearance:none;padding:.55rem .9rem;letter-spacing:.14em;
  text-transform:uppercase;cursor:pointer;min-height:2.6rem}
button:active{background:var(--navy);color:var(--paper)}
a{color:var(--navy)}
.site-mark{margin:0 0 22px;letter-spacing:.16em;text-transform:uppercase;color:var(--scarlet);font-size:10px}
.site-mark a{color:inherit;text-decoration:none}
.site-mark a:hover,.site-mark a:focus-visible{text-decoration:underline}

#titleFlash{position:fixed;inset:0;z-index:25;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:1rem;background:var(--paper);
  padding:12px 16px calc(5.6rem + env(safe-area-inset-bottom,0px));cursor:pointer;
  color:inherit;text-decoration:none}
#titleCard{width:min(92vw,44rem);height:auto;image-rendering:pixelated;image-rendering:crisp-edges;
  box-shadow:8px 14px 0 rgba(22,24,20,.16),0 22px 48px rgba(22,24,20,.18)}
.title-skip{margin:0;letter-spacing:.2em;text-transform:uppercase;color:var(--dim);font-size:10px}
body:not(.booting) #titleFlash{display:none}
body.booting .site-mark,body.booting .always-on,body.booting #stage{visibility:hidden}
body.briefing #stage{transition:opacity .45s ease}

/* Newcomers: hide the dock during briefing; instrument doors stay available */
body.briefing #dock{display:none}
body.briefing{padding-bottom:2rem}

#stage{max-width:36rem;margin:0 auto;display:flex;flex-direction:column;align-items:center;text-align:center}
.jack-hit{padding:0;border:0;background:transparent;min-height:0;letter-spacing:0;text-transform:none;cursor:pointer}
#jackPet{width:144px;height:144px;image-rendering:pixelated;image-rendering:crisp-edges;
  background:var(--well);border:2px solid var(--navy);display:block}
.jack-hit:focus-visible #jackPet{outline:2px solid var(--scarlet);outline-offset:3px}
#jackForm{margin:10px 0 1.1rem;font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim);min-height:1.2em}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

#slip{width:100%;min-height:9.5rem;padding:1.1rem 1.15rem 1.2rem;border:1.5px solid var(--navy);
  background:var(--well);text-align:left;
  clip-path:polygon(14px 0,100% 0,100% 100%,0 100%,0 14px);position:relative}
#slip:before{content:"";position:absolute;top:0;left:0;width:14px;height:14px;
  background:linear-gradient(135deg,transparent 49%,var(--navy) 50%)}
.beat-label{margin:0 0 10px;font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--navy)}
.beat-text{margin:0;font-size:1.05rem;line-height:1.55;min-height:4.5em;white-space:pre-wrap}
.beat-text .caret{display:inline-block;width:.55em;border-bottom:2px solid var(--scarlet);animation:caret .7s steps(1) infinite}
@keyframes caret{50%{opacity:0}}

#work{width:100%;margin:.85rem 0 0;text-align:left}
.work-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:.85rem 0 0;justify-content:center}
.go{display:inline-block;padding:.55rem .9rem;border:2px solid var(--navy);background:var(--navy);color:var(--paper);
  letter-spacing:.1em;text-transform:uppercase;font-size:11px;text-decoration:none}
.go:hover{background:var(--scarlet);border-color:var(--scarlet);color:var(--paper)}
.talk{width:100%;margin-top:.85rem;display:flex;flex-direction:column;gap:8px}
.starters{display:flex;flex-wrap:wrap;gap:6px;margin:0}
.starter{padding:.4rem .65rem;font-size:11px;letter-spacing:.02em;text-transform:none;min-height:0;
  border-color:var(--dim);color:var(--ink);background:var(--paper)}
.starter:hover{border-color:var(--navy);background:var(--well)}
.ask{display:flex;gap:8px;width:100%}
.ask input{flex:1 1 auto;min-width:0;border:1.5px solid var(--navy);background:var(--paper);color:var(--ink);padding:10px;font:inherit;font-size:16px}
.ask button{background:var(--navy);color:var(--paper);border-color:var(--navy)}
.ask button:disabled{opacity:.55;cursor:wait}
.sit{display:flex;flex-direction:column;gap:8px;width:100%;text-align:left;margin-bottom:.85rem}
.sit input,.sit textarea{width:100%;border:1.5px solid var(--navy);background:var(--paper);color:var(--ink);padding:10px;font:inherit;font-size:16px;resize:vertical}
.sit button{background:var(--navy);color:var(--paper);border-color:var(--navy);align-self:flex-start}

/* Punch-card reader — API progress */
.jack-reader{margin:0 0 .35rem;padding:.7rem .75rem .75rem;border:1.5px solid var(--navy);background:var(--well)}
.jack-reader[hidden]{display:none}
.jack-reader-track{
  position:relative;height:3.2rem;overflow:hidden;margin:0 0 .55rem;
  border:1.5px solid var(--navy);background:
    repeating-linear-gradient(90deg, transparent 0, transparent 10px, rgba(30,58,95,.08) 11px, transparent 12px),
    var(--paper);
}
.jack-reader-lamp{
  position:absolute;left:.45rem;top:.45rem;z-index:2;width:.55rem;height:.55rem;
  border-radius:50%;background:var(--dim);box-shadow:0 0 0 2px var(--navy);
}
body.jack-busy .jack-reader-lamp{
  background:var(--scarlet);box-shadow:0 0 0 2px var(--navy),0 0 8px var(--scarlet);
  animation:jack-lamp .7s steps(2,end) infinite;
}
.jack-reader-gate{
  position:absolute;right:22%;top:0;bottom:0;z-index:2;width:3px;background:var(--scarlet);
  box-shadow:0 0 0 1px var(--navy);
}
.ibm-slip{
  position:absolute;top:.4rem;left:0;width:6.6rem;height:2.3rem;
  background:
    repeating-linear-gradient(90deg, transparent 0, transparent 6px, var(--navy) 6px, var(--navy) 7px),
    linear-gradient(180deg, rgba(196,30,58,.12), transparent 28%),
    var(--paper);
  background-size:100% 7px,100% 100%,100% 100%;
  border:1.5px solid var(--navy);
  clip-path:polygon(10px 0,100% 0,100% 100%,0 100%,0 10px);
  box-shadow:2px 2px 0 rgba(30,58,95,.15);opacity:0;
}
body.jack-busy .ibm-slip{animation:jack-slip 2.1s linear infinite}
body.jack-busy .ibm-slip:nth-child(3){animation-delay:.7s}
body.jack-busy .ibm-slip:nth-child(4){animation-delay:1.4s}
.punch-belt{
  display:grid;grid-template-columns:repeat(80,minmax(0,1fr));grid-template-rows:repeat(6,4px);
  gap:1px;min-height:1.6rem;margin:0 0 .35rem;
  background:rgba(30,58,95,.04);border:1px solid rgba(30,58,95,.18);
}
.punch-belt i{display:block;border-radius:1px;background:transparent}
.punch-belt i.in{background:var(--navy)}
.punch-stage{margin:0;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--scarlet);min-height:1.2em}
@keyframes jack-slip{
  0%{transform:translateX(-120%);opacity:0}
  8%{opacity:1}
  86%{opacity:1}
  100%{transform:translateX(min(36rem,110%));opacity:0}
}
@keyframes jack-lamp{50%{opacity:.35}}

.tree-demo{width:100%;margin:0;padding:1rem .9rem 1.05rem;border:1.5px solid var(--navy);background:var(--paper)}
.tree-axis{display:flex;align-items:center;gap:10px;margin:0 0 1rem;font-size:9px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--dim)}
.tree-line{flex:1 1 auto;height:6px;background:var(--navy);border-radius:0;
  box-shadow:0 0 0 2px var(--paper), 0 0 0 3px rgba(30,58,95,.25)}
.tree-beads{display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;margin:0}
.bead{flex:1 1 6.5rem;display:inline-flex;flex-direction:column;align-items:flex-start;gap:2px;
  padding:.55rem .7rem;border:1.5px solid var(--navy);background:var(--well);cursor:pointer;
  text-transform:none;letter-spacing:0;min-height:0;text-align:left}
.bead b{font-size:.95rem;font-weight:700;line-height:1.25}
.bead small{font-size:9px;letter-spacing:.12em;text-transform:uppercase;color:var(--scarlet)}
.bead.on{background:var(--navy);color:var(--paper)}
.bead.on small{color:#e8b4a8}
.bead:hover{border-color:var(--scarlet)}

#invite{width:100%;margin:1.3rem 0 0}
#invite[hidden]{display:none}
.invite-line{margin:0 0 1rem;font-size:1.05rem}
.invite-quiet{margin:1rem 0 0;font-size:13px;letter-spacing:.04em}
.invite-quiet a{color:var(--dim);text-decoration:underline}
.doors{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.door{display:inline-block;padding:.55rem .8rem .45rem;border:2px solid var(--navy);
  background:var(--paper);color:var(--navy);text-decoration:none;letter-spacing:.12em;
  text-transform:uppercase;font-size:11px;min-width:7.2rem;text-align:left}
.door b{display:block;font-size:8px;letter-spacing:.16em;color:var(--scarlet);font-weight:400}
.door.primary{background:var(--navy);color:var(--paper);border-color:var(--navy)}
.door.primary b{color:#e8b4a8}
.door:hover{background:var(--scarlet);border-color:var(--scarlet);color:var(--paper)}
.door:hover b{color:var(--paper)}

.controls{margin:1.4rem 0 0;display:flex;gap:8px;justify-content:center}
.controls[hidden]{display:none}
#advance{background:var(--navy);color:var(--paper);border-color:var(--navy)}
#skip{border-color:var(--dim);color:var(--dim);font-size:12px;letter-spacing:.1em}

#dock{position:fixed;left:0;right:0;bottom:0;z-index:30;
  display:flex;justify-content:space-between;align-items:center;gap:0;
  padding:.65rem .55rem calc(.85rem + env(safe-area-inset-bottom));
  background:var(--navy);border-top:4px solid var(--scarlet);
  font-size:.78rem;letter-spacing:.14em;text-transform:uppercase}
#dock a{color:var(--paper);text-decoration:none;padding:.5rem .1rem;flex:1;min-width:0;text-align:center;white-space:nowrap}
#dock a:hover,#dock a:focus-visible{color:#e8b4a8}

@media(prefers-reduced-motion:reduce){
  .beat-text .caret{animation:none}
  body.briefing #stage,#jackHit,#jackForm{transition:none}
  body.jack-busy .ibm-slip{animation:none;opacity:.85;position:relative;display:inline-block;margin:.35rem .3rem 0 0}
  body.jack-busy .jack-reader-lamp{animation:none}
}
@media(max-width:420px){
  .tree-beads{justify-content:stretch}
  .bead{flex:1 1 100%}
}