:root{
  --paper:#f4f6fa;
  --paper-2:#eef1f7;
  --ink:#1c2b4f;
  --ink-2:#3b4a6b;
  --ink-soft:#7c8aa6;
  --grid:#e7ebf2;
  --grid-major:#d8dfeb;
  --accent:#c94b31;
  --dim:#2f7d76;
  --btn-active:#1c2b4f;
  --btn-toggle:#4c5d84;
  --mono:"IBM Plex Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --minor:14px;
  --major:70px;
}

*{box-sizing:border-box}
html,body{height:100%;margin:0;background:var(--paper);overflow:hidden;font-family:var(--mono);color:var(--ink);
  -webkit-font-smoothing:antialiased;user-select:none}
body{
  background-color:var(--paper);
  background-image:
    linear-gradient(to right, var(--grid-major) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-major) 1px, transparent 1px),
    linear-gradient(to right, var(--grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
  background-size:var(--major) var(--major), var(--major) var(--major), var(--minor) var(--minor), var(--minor) var(--minor);
  background-position:center center;
}
#sheet{position:absolute;inset:0;}
.frame{position:absolute;pointer-events:none;border:1px solid var(--ink);opacity:.75}
.frame-outer{inset:10px 12px 10px 12px}
.frame-inner{inset:34px 36px 34px 36px}
.zone{position:absolute;pointer-events:none;display:flex;color:var(--ink-soft);font-size:10px;letter-spacing:.08em}
.zone-top{top:10px;left:36px;right:36px;height:24px}
.zone-bottom{bottom:10px;left:36px;right:36px;height:24px}
.zone-left{top:34px;bottom:34px;left:12px;width:24px;flex-direction:column}
.zone-right{top:34px;bottom:34px;right:12px;width:24px;flex-direction:column}
.zone span{flex:1;display:flex;align-items:center;justify-content:center;position:relative}
.zone-top span:not(:last-child)::after,.zone-bottom span:not(:last-child)::after{content:"";position:absolute;right:0;top:-2px;bottom:-2px;width:1px;background:var(--ink);opacity:.5}
.zone-left span:not(:last-child)::after,.zone-right span:not(:last-child)::after{content:"";position:absolute;bottom:0;left:-2px;right:-2px;height:1px;background:var(--ink);opacity:.5}

#stage{position:absolute;inset:35px 37px 35px 37px;overflow:hidden}
#gl{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none;cursor:grab}
#gl.dragging{cursor:grabbing}
#gl.hovering{cursor:pointer}
#overlay{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible;font-family:var(--mono)}
#overlay text{font-family:var(--mono)}

header{position:absolute;top:52px;display:flex;gap:12px;align-items:flex-start;pointer-events:none}
#hdr-left{left:52px}
#hdr-right{right:52px;text-align:right;flex-direction:column;align-items:flex-end;gap:0}
.hdr-title{font-size:14px;font-weight:600;letter-spacing:.32em;color:var(--ink)}
.hdr-sub{font-size:10.5px;letter-spacing:.12em;color:var(--ink-soft);margin-top:4px}
.logo{width:30px;height:30px;border:1.5px solid var(--ink);transform:rotate(45deg);display:flex;align-items:center;justify-content:center;margin:1px 8px 0 4px}
.logo span{width:12px;height:12px;border:1.5px solid var(--accent)}

.panel{position:absolute;background:rgba(244,246,250,.92);border:1.5px solid var(--ink);box-shadow:0 0 0 3px rgba(244,246,250,.6);
  transition:opacity .35s ease, transform .35s ease;pointer-events:auto}
.panel.hidden{opacity:0;pointer-events:none;transform:translateY(-6px)}
.panel-h{font-size:11.5px;font-weight:600;letter-spacing:.28em;padding:6px 8px 6px 12px;border-bottom:1.5px solid var(--ink);background:rgba(28,43,79,.06);display:flex;align-items:center;justify-content:space-between;gap:10px}
.panel-min{font-family:var(--mono);font-size:13px;line-height:1;width:20px;height:20px;padding:0;border:1.2px solid var(--ink);background:var(--paper);color:var(--ink);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;flex:none;letter-spacing:0}
.panel-min:hover{background:rgba(28,43,79,.1)}
.panel-min:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
.panel.min > :not(.panel-h):not(.tb-title){display:none}
.panel.min .panel-h,.panel.min .tb-title{border-bottom:none}
.panel.min{width:auto;min-width:0}
.panel.min .tb-big{font-size:12px;line-height:1.4}
.panel.min .tb-lbl{display:none}
#key{left:52px;top:116px;width:470px}
.key-grid{display:grid;grid-template-columns:1fr 1fr;padding:8px 10px 4px 10px;gap:0 8px}
.key-grid > div:nth-child(odd){border-right:1px solid rgba(28,43,79,.25);padding-right:8px}
.key-item{display:flex;align-items:center;gap:8px;font-size:11.5px;color:var(--ink-2);height:27px;white-space:nowrap;cursor:pointer}
.key-item.hot{color:var(--accent)}
.num{width:20px;height:20px;border:1.2px solid var(--ink);border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:10px;color:var(--ink);flex:none;background:var(--paper)}
.key-item.hot .num{border-color:var(--accent);color:var(--accent)}
.key-foot{display:flex;justify-content:space-between;border-top:1px solid rgba(28,43,79,.35);padding:6px 12px;font-size:9.5px;letter-spacing:.14em;color:var(--ink-soft)}
.key-foot b{color:var(--ink);font-weight:600}

#instr{right:52px;top:116px;width:292px}
.instr-grid{padding:8px 12px 10px 12px;display:grid;grid-template-columns:1fr auto;row-gap:5px;font-size:10.5px;letter-spacing:.06em}
.instr-grid .k{color:var(--ink-soft)}
.instr-grid .v{color:var(--ink);font-weight:600;text-align:right;font-variant-numeric:tabular-nums}

#controls{left:52px;bottom:52px;padding:8px 12px}
.ctl-row{display:flex;align-items:center;gap:10px;margin:4px 0}
.ctl-label{width:52px;font-size:9.5px;letter-spacing:.2em;color:var(--ink-soft)}
.ctl-btns{display:flex;gap:5px}
.btn{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--ink);background:var(--paper);border:1.5px solid var(--ink);
  min-width:72px;height:27px;padding:0 6px;cursor:pointer;transition:background .35s ease,color .35s ease}
.btn:hover{background:rgba(28,43,79,.08)}
.btn.active{background:var(--btn-active);color:#fff}
.btn.toggled{background:var(--btn-active);color:#fff;border-color:var(--ink)}
.btn.pulse{animation:pulse .5s ease}
@keyframes pulse{0%{background:var(--accent);color:#fff}100%{background:var(--paper);color:var(--ink)}}

#titleblock{right:52px;bottom:52px;width:480px}
.tb-title{padding:8px 8px 10px 14px;border-bottom:1.5px solid var(--ink);display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.panel.min .tb-title{padding:6px 8px 6px 12px;align-items:center}
.tb-lbl{font-size:9px;letter-spacing:.22em;color:var(--ink-soft)}
.tb-big{font-size:15px;font-weight:600;letter-spacing:.18em;line-height:1.55;margin-top:2px}
.tb-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.tb-cell{padding:6px 10px 7px 12px;border-right:1px solid rgba(28,43,79,.35);border-bottom:1px solid rgba(28,43,79,.35)}
.tb-cell:nth-child(4n){border-right:none}
.tb-cell:nth-last-child(-n+4){border-bottom:none}
.tb-cell .tb-lbl{font-size:8.5px}
.tb-cell .tb-val{font-size:11.5px;font-weight:600;letter-spacing:.08em;margin-top:2px;white-space:nowrap}
.tb-cell .tb-val.red{color:var(--accent)}

#hint{position:absolute;left:50%;bottom:30px;transform:translateX(-50%);font-size:9.5px;letter-spacing:.22em;color:var(--ink-soft);opacity:.8;pointer-events:none}
#viewtitle{position:absolute;left:50%;bottom:66px;transform:translateX(-50%);text-align:center;pointer-events:none;opacity:0;transition:opacity .4s ease}
#viewtitle.show{opacity:1}
.vt-rule{width:175px;height:1.5px;background:var(--ink);margin:0 auto 7px auto}
.vt-name{font-size:16px;font-weight:600;letter-spacing:.36em}
.vt-sub{font-size:10px;letter-spacing:.14em;color:var(--ink-soft);margin-top:5px}

#tooltip{position:absolute;pointer-events:none;background:rgba(244,246,250,.96);border:1.5px solid var(--accent);padding:6px 12px 7px 12px;
  width:max-content;max-width:min(280px,calc(100% - 16px));opacity:0;box-shadow:0 0 0 3px rgba(244,246,250,.7);z-index:5}
#tooltip.show{opacity:1}
.tt-name{font-size:11.5px;font-weight:600;letter-spacing:.2em;color:var(--accent)}
.tt-desc{font-size:10px;line-height:1.4;letter-spacing:.06em;color:var(--ink-soft);margin-top:3px;white-space:normal}
#tooltip.compact{width:max-content;max-width:min(176px,calc(100% - 16px));padding:6px 8px;border-width:1px;box-shadow:none}
#tooltip.compact .tt-name{font-size:11px;line-height:1.35;letter-spacing:.04em;overflow-wrap:anywhere}
#tooltip.compact .tt-desc{font-size:10px;line-height:1.4;letter-spacing:0;white-space:normal;overflow-wrap:anywhere}
#part-pointer{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:4;display:none;overflow:hidden;fill:none;stroke:var(--accent);stroke-width:1}
#part-pointer.show{display:block}
#part-pointer .part-pointer__point{fill:var(--accent)}
#part-pointer .part-pointer__badge{fill:var(--paper)}
#part-pointer text{fill:var(--accent);stroke:none;font:600 10px var(--mono);text-anchor:middle}

#fallback[hidden]{display:none}
#fallback{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--ink);background:var(--paper);z-index:50;text-align:center;padding:40px}

@media (max-width:1700px){ .vt-sub{font-size:9.5px;letter-spacing:.07em} }
@media (max-width:1100px){
  #key{width:380px}.key-item{font-size:10px}
  #titleblock{width:400px}
  #instr{width:250px}
}

/* ---- sheet cards: one control fades them all away, matching the PANELS dissolve ---- */
#cards-toggle{position:absolute;top:52px;right:52px;width:26px;height:26px;padding:0;z-index:6;
  border:1.5px solid var(--ink);background:var(--paper);cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:background .18s ease,opacity .3s ease}
#cards-toggle:hover{background:rgba(28,43,79,.1)}
#cards-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
#cards-toggle span{display:block;width:12px;height:12px;border:1.5px solid var(--ink);position:relative}
#cards-toggle span::after{content:"";position:absolute;inset:-1.5px;border-top:1.5px solid var(--ink);
  transform:rotate(45deg);transform-origin:center;opacity:0;transition:opacity .2s ease}
body.cards-off #cards-toggle span::after{opacity:1}
body.cards-off #cards-toggle{opacity:.45}
body.cards-off #cards-toggle:hover{opacity:1}
/* the dissolve: the cards fade and lift the way the shell does under PANELS */
#key,#instr,#controls,#titleblock,#hdr-left,#hdr-right{transition:opacity .45s ease,transform .45s ease}
/* the very first paint must not animate: a page opened with the cards hidden should simply have none */
body.no-card-anim #key,body.no-card-anim #instr,body.no-card-anim #controls,
body.no-card-anim #titleblock,body.no-card-anim #hdr-left,body.no-card-anim #hdr-right,
body.no-card-anim #cards-toggle{transition:none}
body.cards-off #key,body.cards-off #instr,body.cards-off #controls,
body.cards-off #titleblock,body.cards-off #hdr-left,body.cards-off #hdr-right{
  opacity:0;transform:translateY(-8px);pointer-events:none}

/* ---- narrow sheets ------------------------------------------------------------------
   The drawing sheet is drawn for a wide aspect. As the window narrows the cards are shrunk,
   then re-stacked down the left, then reduced to the controls and a one-line title block, so
   the drawing itself always keeps the middle of the sheet. ---------------------------------- */
@media (max-width:1500px){
  #key{width:412px}
  .key-item{font-size:10.5px;height:24px}
  #titleblock{width:392px}
  .tb-big{font-size:13px;letter-spacing:.14em}
  #instr{width:262px}
}
@media (max-width:1240px){
  #hdr-right{display:none}
  #controls{bottom:auto;top:112px;left:52px}
  #key{top:196px;width:392px}
  #instr{top:112px;width:236px}
  .instr-grid{font-size:9.5px}
  #titleblock{width:320px}
  .tb-grid{grid-template-columns:repeat(2,1fr)}
  .tb-cell:nth-child(2n){border-right:none}
  .tb-cell:nth-child(4n){border-right:1px solid rgba(28,43,79,.35)}
}
@media (max-width:980px){
  #key,#instr{display:none}
  #stage{inset:28px 30px}
  .frame-inner{inset:27px 29px}
  .zone-top{top:8px;left:29px;right:29px;height:19px}
  .zone-bottom{bottom:8px;left:29px;right:29px;height:19px}
  .zone-left{top:27px;bottom:27px;left:10px;width:19px}
  .zone-right{top:27px;bottom:27px;right:10px;width:19px}
  header{top:40px}
  #hdr-left{left:40px}
  .hdr-title{font-size:12px;letter-spacing:.22em}
  .hdr-sub{font-size:9px}
  .logo{width:24px;height:24px}
  #cards-toggle{top:40px;right:40px}
  #controls{top:88px;left:40px;padding:6px 9px}
  .btn{min-width:62px;height:24px;font-size:10px;padding:0 5px}
  .ctl-label{width:46px;font-size:8.5px;letter-spacing:.14em}
  #titleblock{width:290px;right:40px;bottom:40px}
  .tb-big{font-size:11.5px;letter-spacing:.1em}
  .tb-cell .tb-val{font-size:10px}
}
@media (max-width:640px){
  #stage{inset:20px 20px}
  .frame-outer{inset:6px 6px}
  .frame-inner{inset:19px 19px}
  .zone-top,.zone-bottom,.zone-left,.zone-right{display:none}
  header{top:28px}
  #hdr-left{left:26px;gap:8px}
  .hdr-sub{display:none}
  .hdr-title{font-size:10.5px;letter-spacing:.16em}
  .logo{width:20px;height:20px;margin:0 5px 0 0}
  .logo span{width:8px;height:8px}
  #cards-toggle{top:26px;right:26px;width:22px;height:22px}
  #controls{top:60px;left:26px;right:26px;padding:5px 7px}
  .ctl-row{gap:6px;margin:3px 0;min-width:0}
  .ctl-label{width:38px;font-size:8px;letter-spacing:.1em}
  .ctl-btns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:4px;flex:1;min-width:0}
  .btn{min-width:0;width:100%;height:23px;font-size:9.5px;padding:0 2px;letter-spacing:.04em;overflow:hidden}
  #titleblock{width:auto;left:26px;right:26px;bottom:26px;max-width:calc(100vw - 52px)}
  .tb-title{padding:5px 8px 6px 10px}
  .tb-lbl{font-size:7.5px}
  .tb-big{font-size:10.5px;line-height:1.4;letter-spacing:.06em;overflow-wrap:anywhere}
  .tb-grid{display:none}
  #viewtitle{bottom:44px}
  .vt-name{font-size:11px;letter-spacing:.18em}
  .vt-rule{width:110px;margin-bottom:4px}
  .vt-sub{font-size:8px}
  #hint{display:none}
}

/* short viewports (phone held sideways, or a squat browser pane): the cards have to give up
   the vertical space, so the title block loses its grid and the controls sit in one strip */
@media (max-height:520px){
  #key,#instr{display:none}
  .hdr-sub{display:none}
  #controls{top:auto;bottom:20px;left:20px;padding:5px 8px}
  #titleblock{bottom:20px;right:20px;width:auto;max-width:44vw}
  .tb-grid{display:none}
  .tb-big{font-size:10.5px;line-height:1.35}
  #viewtitle,#hint{display:none}
  header{top:22px}
  #hdr-left{left:22px}
  #cards-toggle{top:22px;right:22px}
  #stage{inset:16px 18px}
  .frame-outer{inset:5px 6px}
  .frame-inner{inset:15px 17px}
  .zone-top,.zone-bottom,.zone-left,.zone-right{display:none}
}

/* The tour sits above the controls on wide sheets, beside the title block below 1240. */
#tour-card{position:absolute;left:52px;bottom:166px;width:460px;max-width:calc(100vw - 104px);
  padding:12px 14px;background:rgba(244,246,250,.96);border-top:1.5px solid var(--ink);
  color:var(--ink);font-family:var(--mono);pointer-events:none}
#tour-card[hidden]{display:none}
.tour-step{font-size:10px;letter-spacing:.14em;color:var(--accent)}
.tour-title{font-size:13px;font-weight:600;letter-spacing:.16em;margin-top:7px}
.tour-caption{font-size:11px;line-height:1.6;margin:7px 0 10px;color:var(--ink-2)}
.tour-hint{font-size:9px;letter-spacing:.1em;color:var(--ink-soft)}
@media (max-width:1240px){#tour-card{bottom:52px;width:460px}}
@media (max-width:980px){#tour-card{left:40px;bottom:240px;width:400px}}
@media (max-width:640px){#tour-card{left:26px;bottom:110px;width:calc(100vw - 52px);max-width:none}}
@media (max-height:520px){#tour-card{left:22px;top:70px;bottom:auto;width:400px}}

/* Keep the single tour launcher reachable when the sheet opens with its cards hidden. */
body.cards-off #controls{opacity:1;transform:none;pointer-events:none;
  background:transparent;border-color:transparent;box-shadow:none}
body.cards-off #controls .ctl-row{visibility:hidden}
body.cards-off #tour-btn{visibility:visible;pointer-events:auto}

/* Registration and navigation use the same ink, rules and type as the sheet. */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.header-tools{display:flex;align-items:center;gap:12px;margin-top:5px;pointer-events:auto}
.header-tools button,.header-tools a{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;color:var(--ink);background:var(--paper)}
#agent-chip{border:1px solid var(--ink);padding:2px 6px;cursor:pointer;line-height:1.3}
#agent-chip.registered{color:var(--accent);border-color:var(--accent)}
.header-tools a{text-decoration:none;border-bottom:1px solid var(--ink-soft)}
.header-tools a:hover,#agent-chip:hover{color:var(--accent)}
.header-tools :focus-visible,.key-item:focus-visible,#gl:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
#agent-tools{left:52px;top:116px;width:530px;max-width:calc(100vw - 104px);max-height:calc(100vh - 168px);overflow:auto;z-index:8;background:var(--paper)}
#agent-tools[hidden]{display:none}
#agent-tools-list{display:grid;grid-template-columns:max-content 1fr;gap:8px 14px;padding:12px;margin:0;font-size:10px;line-height:1.5}
#agent-tools-list dt{color:var(--accent);font-weight:500}
#agent-tools-list dd{margin:0;color:var(--ink-2)}
body.cards-off #hdr-left{opacity:1;transform:none}
body.cards-off #hdr-left .logo,body.cards-off #hdr-left .hdr-title,body.cards-off #hdr-left .hdr-sub{visibility:hidden}
body.cards-off #key,body.cards-off #instr,body.cards-off #titleblock{visibility:hidden}
.panel.hidden .key-item{visibility:hidden}
@media (max-width:640px){
  #controls{top:82px}
  #agent-tools{left:26px;top:82px;max-width:calc(100vw - 52px);max-height:calc(100vh - 108px)}
  #agent-tools-list{grid-template-columns:1fr;gap:2px}
  #agent-tools-list dd{margin-bottom:7px}
}
@media (max-height:520px){#agent-tools{top:76px;max-height:calc(100vh - 96px)}}

/* header links: legible as buttons, not only as labels */
.header-tools a{border:1px solid var(--ink-soft);border-radius:3px;padding:2px 7px;text-decoration:none;color:var(--ink);letter-spacing:.16em}
.header-tools a:hover,.header-tools a:focus-visible{border-color:var(--accent);color:var(--accent);outline:none}
body.nav-off .header-tools a{display:none}

/* phones: the sheet is a drawing designed for a desk, so on a phone the drawing panels stay off but the
   controls stay on, at a size a thumb can hit; the header links wrap under the title */
@media (max-width:640px){
  #hdr-left{right:64px}
  .header-tools{flex-wrap:wrap;gap:6px;margin-top:6px}
  .header-tools button:not([hidden]),.header-tools a{font-size:10.5px;padding:5px 8px;min-height:28px;display:inline-flex;align-items:center}
  /* framed inside the configurator on a phone the host's own controls drive the sheet; the caption card
     moves to the top, clear of the host's bottom sheet */
  body.framed #controls{display:none}
  body.framed #tour-card{top:150px;bottom:auto}
  #cards-toggle{width:32px;height:32px;top:22px;right:22px}
  body.cards-off #controls{visibility:visible;opacity:1;pointer-events:auto;transform:none}
  body.cards-off #controls .ctl-row{visibility:visible}
  body.cards-off #key,body.cards-off #instr,body.cards-off #titleblock{visibility:hidden}
  #controls{top:140px;left:22px;right:22px;padding:6px 8px;background:rgba(244,246,250,.92)}
  /* the caption card and the title block share the bottom edge; the tour wins while it runs */
  body:has(#tour-card:not([hidden])) #titleblock{visibility:hidden}
  .ctl-label{display:none}
  .ctl-row{gap:0;margin:4px 0}
  .ctl-btns{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}
  .btn{height:34px;font-size:11px;letter-spacing:.06em}
  #tour-btn{height:34px}
  #tour-card{bottom:26px;left:22px;width:calc(100vw - 44px)}
}

/* Primary actions stay reachable while the drawing panels are tucked away. */
#primary-controls{position:absolute;right:92px;top:44px;z-index:7;display:flex;gap:6px}
#primary-controls .btn{height:44px;min-width:76px}
#hdr-right{right:200px}
.compact-only{display:none}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.key-item{font-family:var(--mono);text-align:left;background:transparent;border:0;padding:0;width:100%;letter-spacing:0}
#compact-sheet{position:fixed;inset:auto 16px max(16px,env(safe-area-inset-bottom));margin:0 auto;padding:0;width:560px;max-width:calc(100% - 32px);max-height:calc(100dvh - 32px);overflow:auto;border:1px solid var(--grid-major);border-radius:14px;background:var(--paper);color:var(--ink);box-shadow:0 10px 32px #1c2b4f18;z-index:20;overscroll-behavior:contain}
#compact-sheet[aria-modal="true"]::backdrop{background:#e7ebf270;backdrop-filter:blur(3px)}
.compact-sheet-header{position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 4px 0 16px;background:var(--paper);border-bottom:1px solid var(--grid-major);z-index:1}
.compact-sheet-header h2{font-size:11px;letter-spacing:.12em;margin:0}
.compact-sheet-header .panel-min{width:44px;height:44px;border:0;background:transparent;font-size:24px}
.compact-section{padding:12px 16px}
.compact-section[hidden],#selected-part[hidden]{display:none}
.compact-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}
.compact-grid .btn{min-width:0;min-height:44px;width:100%;font-size:11px;line-height:1.3;letter-spacing:.02em;padding:6px 4px;white-space:normal;overflow:visible;border:1px solid var(--grid-major);border-radius:7px}
.compact-grid .btn.toggled,.compact-grid .btn.active{border-color:var(--ink)}
#compact-sheet[aria-modal="false"]{width:440px;bottom:calc(max(16px,env(safe-area-inset-bottom)) + 68px);max-height:calc(100dvh - 104px)}
#compact-sheet[aria-modal="false"] .compact-sheet-header{display:none}
#compact-sheet[aria-modal="false"] .compact-section{padding:12px}
#compact-more:not([hidden]){display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}
#compact-motion-btns,#compact-more .compact-secondary{display:contents}
#compact-more .btn{min-height:44px}
@media (max-width:360px){#compact-sheet .compact-grid .btn{font-size:10px;letter-spacing:0}}
#compact-key-grid .key-item{min-height:48px;height:auto;padding:8px 0;border-bottom:1px solid var(--grid);font-size:12px;white-space:normal;line-height:1.5;gap:12px}
#compact-key-grid .key-item:last-child{border-bottom:0}
#compact-key-grid .num{width:26px;height:26px}
#selected-part{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
#tooltip{max-width:min(280px,calc(100% - 16px))}
.tt-desc{white-space:normal;line-height:1.45}
body.cards-off #overlay{opacity:0}
body.cards-off #controls .ctl-row{visibility:hidden}
body.cards-off #tour-btn{visibility:visible}

/* A compact sheet reserves real space for navigation and a four-action toolbar. */
@media (max-width:980px),(max-height:520px){
  :root{--minor:28px;--major:140px;--tour-space:0px}
  #stage{inset:112px 16px 100px}
  #hdr-left{top:20px;left:20px;right:20px;gap:10px;align-items:center}
  #hdr-left>div:last-child{min-width:0;flex:1}
  .hdr-title{font-size:11px;letter-spacing:.1em;line-height:1.5}
  #hdr-left .logo{width:20px;height:20px;margin:0 8px 0 0;align-self:flex-start}
  #hdr-left .logo span{width:8px;height:8px}
  #hdr-left .hdr-sub,#hdr-right,#key,#instr,#titleblock,#controls,#cards-toggle{display:none}
  body.cards-off #hdr-left .logo,body.cards-off #hdr-left .hdr-title{visibility:visible}
  .header-tools{gap:6px;margin-top:7px;flex-wrap:nowrap}
  .header-tools a{min-height:44px;font-size:10px;padding:6px 9px;display:inline-flex;align-items:center;border-color:var(--grid-major);letter-spacing:.06em;white-space:nowrap}
  .header-tools #agent-chip{display:none}
  #primary-controls{left:16px;right:16px;top:auto;bottom:max(16px,env(safe-area-inset-bottom));padding:7px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:5px;border:1px solid var(--grid-major);border-radius:10px;background:var(--paper);box-shadow:0 4px 18px #1c2b4f0a}
  #primary-controls .btn{display:block;min-width:0;height:44px;font-size:11px;letter-spacing:.04em;border:0;border-radius:5px;background:transparent}
  #primary-controls .btn:hover,#primary-controls .btn[aria-expanded="true"]{background:var(--paper-2)}
  #primary-controls #reset-btn{background:var(--ink);color:var(--paper)}
  #hint{display:block;bottom:4px;max-width:100%;width:max-content;font-size:9px;letter-spacing:.08em;white-space:nowrap;background:var(--paper);padding:4px 8px;border-radius:4px}
  #viewtitle{bottom:26px;max-width:100%;width:max-content}
  .vt-name{font-size:11px;letter-spacing:.14em}.vt-sub{display:none}.vt-rule{width:96px}
  .frame,.zone{display:none}
  #tour-card{left:16px;right:16px;top:100px;bottom:auto;width:auto;max-width:none;max-height:35dvh;overflow:auto;margin:0;padding:10px 12px;border-color:var(--grid-major);pointer-events:auto}
  .tour-title{font-size:12px;letter-spacing:.08em;margin-top:4px}.tour-caption{margin:4px 0;font-size:11px}.tour-hint{font-size:8px}
  body.tour-active #stage{top:calc(112px + var(--tour-space,0px))}
  #agent-tools{left:16px;right:16px;top:104px;width:auto;max-width:none;max-height:calc(100dvh - 190px)}
  #agent-tools .panel-min{height:44px;width:44px;font-size:22px}
  #agent-tools-list{grid-template-columns:1fr;gap:3px;font-size:11px}
  #agent-tools-list dd{margin-bottom:10px}
}
@media (max-height:520px) and (min-width:641px){
  :root{--landscape-controls-width:clamp(288px,39vw,360px)}
  #hdr-left{top:12px;left:18px;right:18px}
  #hdr-left>div:last-child{display:flex;align-items:center;justify-content:space-between;gap:16px}
  .header-tools{margin-top:0}
  /* Reserve the controls column even when its tray is closed, so trying a
     combination of actions never moves the vehicle underneath the pointer. */
  #stage{inset:72px calc(var(--landscape-controls-width) + 36px) 18px 18px}
  #primary-controls{left:auto;right:18px;transform:none;width:var(--landscape-controls-width);bottom:10px}
  #compact-sheet[aria-modal="false"]{left:auto;right:18px;bottom:78px;width:var(--landscape-controls-width);max-height:calc(100dvh - 150px);margin:0}
  #hint{font-size:8px;bottom:0}
  #tour-card{left:18px;right:calc(var(--landscape-controls-width) + 36px);top:68px;max-height:32dvh}
  body.tour-active #stage{top:calc(72px + var(--tour-space,0px))}
}

/* The host provides the My Car navigation and controls; only its drawing occupies this frame. */
body.framed #hdr-left,body.framed #hdr-right,body.framed #controls,body.framed #key,body.framed #instr,body.framed #titleblock,body.framed #cards-toggle,body.framed #primary-controls,body.framed #selected-part,body.framed .frame,body.framed .zone,body.framed #hint,body.framed #viewtitle{display:none}
body.framed #stage{inset:0}
body.framed #tour-card{left:12px;right:12px;top:8px;bottom:auto;width:auto;max-width:none;max-height:36dvh;overflow:auto;margin:0;padding:10px 12px;pointer-events:auto}
body.framed.tour-active #stage{top:var(--tour-space,0px)}
@media (prefers-reduced-motion:reduce){.btn,.panel,#overlay{transition:none}}

/* The Home exhibit shares its page's white surface and only reveals discovery
   controls once the short guided sequence ends or the visitor interrupts it. */
html:has(body.demo),body.demo{background:#fff;background-image:none}
body.demo{--paper:#fff;--paper-2:#f7f7f7;--ink:#202020;--ink-soft:#737373}
body.demo #hdr-left,body.demo #hdr-right,body.demo #controls,body.demo #key,body.demo #instr,body.demo #titleblock,body.demo #cards-toggle,body.demo #primary-controls,body.demo #selected-part,body.demo .frame,body.demo .zone,body.demo #hint,body.demo #viewtitle,body.demo #tooltip,body.demo #overlay,body.demo #agent-tools{display:none}
body.demo #stage{inset:0}
body.demo.tour-active #stage{top:var(--tour-space,0px)}
body.demo.demo-exploring #stage{bottom:var(--demo-space,88px)}
body.demo #tour-card{left:16px;right:16px;top:0;bottom:auto;max-height:38dvh;width:auto;max-width:none;padding:10px 4px 6px;background:#fff;border:0;box-shadow:none;text-align:center}
body.demo #tour-card .tour-step,body.demo #tour-card .tour-hint{display:none}
body.demo #tour-card .tour-title{margin:0;font-size:12px;line-height:1.4;letter-spacing:.06em}
body.demo #tour-card .tour-caption{margin:5px auto 0;max-width:540px;color:#737373;font-size:11px;line-height:1.45}
#demo-discovery{display:none}
body.demo #demo-discovery:not([hidden]){position:absolute;left:12px;right:12px;bottom:4px;display:flex;flex-direction:column;align-items:center;gap:3px;background:#fff;z-index:8}
#demo-discovery-hint{max-width:100%;margin:0;font-size:11px;line-height:1.55;text-align:center;color:#737373;letter-spacing:0}
.demo-action-row{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}
#demo-discovery button{font:inherit;font-size:11px;letter-spacing:0;line-height:1.3;color:#333;background:transparent;border:0;border-radius:5px;min-height:44px;padding:8px;cursor:pointer}
#demo-discovery button:hover{background:#f5f5f5}
#demo-discovery button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
#demo-discovery button[aria-pressed="true"]{background:#242424;color:#fff}
#demo-options:not([hidden]){display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;width:min(100%,360px)}
#demo-discovery #demo-options-toggle{color:#737373}
@media (max-width:360px){.demo-action-row{gap:6px}#demo-discovery-hint{font-size:10px}}