/* Layout and chrome for the system viewer. Tokens match viewer/page.css. */
:root{--paper:#F4F2EC;--ink:#1B2430;--ink-2:#4A5563;--ink-3:#7C8794;--rule:#D9D4C9;--panel:#EBE8E0;
  --orange:#E0621F;--orange-ink:#B84E15;--blue:#1F4E8C;--blue-soft:#DCE6F4;--scene:#E6E2D8;
  --mono:'IBM Plex Mono',ui-monospace,Menlo,monospace;--sans:'IBM Plex Sans',system-ui,sans-serif;
  --disp:'Barlow Condensed','Arial Narrow',sans-serif;color-scheme:light}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--paper:#15191F;--ink:#ECE9E1;--ink-2:#B8BEC7;--ink-3:#7F8791;
  --rule:#2E353E;--panel:#1D232B;--orange:#F07A38;--orange-ink:#F59A64;--blue:#7FA6DD;--blue-soft:#1F2C3E;--scene:#1A2028;color-scheme:dark}}
:root[data-theme="dark"]{--paper:#15191F;--ink:#ECE9E1;--ink-2:#B8BEC7;--ink-3:#7F8791;--rule:#2E353E;--panel:#1D232B;
  --orange:#F07A38;--orange-ink:#F59A64;--blue:#7FA6DD;--blue-soft:#1F2C3E;--scene:#1A2028;color-scheme:dark}

*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.5;
  display:flex;flex-direction:column;overflow:hidden}
.eyebrow{font-family:var(--mono);font-size:10.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--orange-ink)}

header.bar{display:flex;justify-content:space-between;align-items:baseline;gap:18px;flex-wrap:wrap;
  padding:12px 20px 10px;border-bottom:3px solid var(--ink);flex:0 0 auto}
header.bar h1{font-family:var(--disp);font-weight:700;font-size:clamp(22px,3vw,34px);line-height:1;margin:2px 0 0;text-transform:uppercase;letter-spacing:.01em}
header.bar .meta{font-family:var(--mono);font-size:11px;color:var(--ink-3);text-align:right;line-height:1.7}
header.bar .meta b{color:var(--ink);font-weight:500}

#app{flex:1 1 auto;display:grid;grid-template-columns:230px minmax(0,1fr);min-height:520px}

/* component tree */
.tree{border-right:1px solid var(--rule);background:var(--panel);overflow-y:auto;padding:0 0 20px}
.tree-head{position:sticky;top:0;background:var(--panel);padding:12px 14px 8px;border-bottom:1px solid var(--rule);
  display:flex;justify-content:space-between;align-items:center;gap:8px;z-index:2}
.tree .mini{font-family:var(--mono);font-size:10px;letter-spacing:.06em;text-transform:uppercase;background:none;
  border:1px solid var(--rule);color:var(--ink-2);padding:3px 7px;cursor:pointer}
.tree .mini:hover{color:var(--ink);border-color:var(--ink-3)}
.tree .unit{padding:10px 0 2px}
.tree h3{font-family:var(--disp);font-size:17px;text-transform:uppercase;margin:6px 14px 4px;letter-spacing:.02em;color:var(--ink)}
.tree h4{font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);
  font-weight:500;margin:9px 14px 3px}
.tree .item{display:block;width:100%;text-align:left;background:none;border:0;border-left:3px solid transparent;
  padding:5px 14px 5px 14px;font:inherit;font-size:13.5px;color:var(--ink-2);cursor:pointer}
.tree .item:hover{color:var(--ink);background:rgba(128,128,128,.09)}
.tree .item.on{color:var(--ink);border-left-color:var(--orange);background:rgba(224,98,31,.12);font-weight:600}
.tree .item i{font-style:normal;font-family:var(--mono);font-size:9px;color:var(--blue);border:1px solid currentColor;
  border-radius:2px;padding:0 3px;margin-left:6px;vertical-align:1px}
.tree .item:focus-visible,.mini:focus-visible{outline:2px solid var(--orange);outline-offset:-2px}

/* stage */
.stage{position:relative;background:var(--scene);min-width:0;min-height:480px;overflow:hidden}
.stage canvas{display:block;width:100%;height:100%;cursor:grab}
.stage canvas:active{cursor:grabbing}
.hud{position:absolute;display:flex;gap:6px;flex-wrap:wrap;align-items:center;z-index:3}
.hud-tl{left:14px;top:14px;right:14px;max-width:calc(100% - 28px)}
.modes{display:inline-flex;gap:6px;margin-right:10px;padding-right:10px;border-right:1px solid var(--rule)}

.hud button,.hud .slider{font-family:var(--mono);font-size:11px;letter-spacing:.05em;text-transform:uppercase;
  background:var(--paper);color:var(--ink);border:1px solid var(--rule);padding:6px 10px;cursor:pointer;display:inline-flex;align-items:center;gap:7px}
.hud button:hover{border-color:var(--ink-3)}
.hud button.on{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.hud button i{width:9px;height:9px;border-radius:2px;display:inline-block}
.hud button:focus-visible{outline:2px solid var(--orange);outline-offset:2px}
.slider{cursor:default}
.slider input{width:110px;accent-color:var(--orange);cursor:pointer}
.hint{position:absolute;right:14px;bottom:14px;font-family:var(--mono);font-size:10.5px;color:var(--ink-3);z-index:3}

/* info card */
.card{position:absolute;right:14px;top:14px;width:min(330px,42vw);max-height:calc(100% - 90px);overflow-y:auto;
  background:var(--paper);border:1px solid var(--ink);padding:14px 16px 16px;z-index:4;box-shadow:4px 4px 0 rgba(0,0,0,.10)}
.card[hidden]{display:none}
.card h3{font-family:var(--disp);font-size:26px;text-transform:uppercase;margin:3px 0 8px;line-height:1;letter-spacing:.01em}
.card p{margin:0 0 9px;font-size:13.5px;color:var(--ink-2)}
.card p.lbl{font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--orange-ink);margin:12px 0 3px}
.card p.src{font-family:var(--mono);font-size:10.5px;color:var(--blue);background:var(--blue-soft);padding:4px 7px;margin-bottom:10px}
.card .x{position:absolute;right:8px;top:6px;background:none;border:0;font-size:20px;line-height:1;color:var(--ink-3);cursor:pointer;padding:2px 6px}
.card .x:hover{color:var(--ink)}
.chips{display:flex;flex-wrap:wrap;gap:5px;margin-top:12px}
.chip{font-family:var(--mono);font-size:9.5px;letter-spacing:.06em;text-transform:uppercase;border:1px solid var(--rule);
  padding:2px 6px;display:inline-flex;align-items:center;gap:5px;color:var(--ink-2)}
.chip i{width:8px;height:8px;border-radius:2px;display:inline-block}

footer.note{flex:0 0 auto;padding:7px 20px;border-top:1px solid var(--rule);font-family:var(--mono);
  font-size:10.5px;color:var(--ink-3);background:var(--panel)}

@media (max-width:820px){
  #app{grid-template-columns:1fr;grid-template-rows:minmax(0,1fr) 190px}
  .tree{order:2;border-right:0;border-top:1px solid var(--rule)}
  .card{width:auto;left:14px;right:14px;top:auto;bottom:52px;max-height:44%}
  .hud-bl{bottom:auto;top:56px}
  .hint{display:none}
}

/* ── sequence playback ── */

.modes button{font-weight:500}
.seq{position:absolute;left:50%;transform:translateX(-50%);bottom:16px;width:min(640px,74%);z-index:3;
  background:var(--paper);border:1px solid var(--ink);padding:9px 14px 11px;box-shadow:3px 3px 0 rgba(0,0,0,.10)}
.seq[hidden]{display:none}
.seq p{margin:8px 0 0;font-size:14px;line-height:1.45}
.seq .legend{display:block;margin-top:7px;font-family:var(--mono);font-size:10px;letter-spacing:.06em;
  text-transform:uppercase;color:var(--ink-3)}
.seq .legend:empty{display:none}
.pbar{height:3px;background:var(--rule);overflow:hidden}
.pbar i{display:block;height:100%;width:0;background:var(--orange);transition:width .25s linear}
@media (max-width:820px){
  .hud-tc{left:14px;transform:none;top:52px}
  .seq{width:auto;left:10px;right:10px;transform:none;bottom:10px}
  .seq p{font-size:13px}
}

/* circuit filters live in the sidebar */
.filters{padding:10px 14px 12px;border-bottom:1px solid var(--rule)}
.filters .eyebrow{display:block;margin-bottom:7px}
.circuits{display:flex;flex-direction:column;gap:3px}
.circuits button{font-family:var(--mono);font-size:10.5px;letter-spacing:.05em;text-transform:uppercase;text-align:left;
  background:none;border:1px solid transparent;color:var(--ink-2);padding:4px 7px;cursor:pointer;
  display:flex;align-items:center;gap:7px}
.circuits button:hover{color:var(--ink);background:rgba(128,128,128,.09)}
.circuits button.on{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.circuits button i{width:9px;height:9px;border-radius:2px;display:inline-block;flex:0 0 auto}
@media (max-width:820px){ .modes{border-right:0;margin-right:0} }