/* ===== Engineering layer (2026-10-08) — applies ONLY outside sections 01–06 (#p1–#p6).
   Adds: search palette (Ctrl/⌘ K), keyboard shortcuts, IDE-style status bar, interactive hero scope,
   NEWS filter + list view, instrument-style header tabs. Remove this block and the "engineering layer"
   script to return to the previous look. ===== */
kbd{font-family:var(--mono);font-size:13px;font-weight:500;line-height:1;padding:3px 6px;border-radius:5px;border:1px solid var(--rule);
  border-bottom-width:2px;background:var(--panel);color:var(--ink-2);white-space:nowrap}
/* header: square instrument tabs with an underline cursor instead of pills */
header.top .tab{border-radius:6px;position:relative}
header.top .tab::after{content:"";position:absolute;left:10px;right:10px;bottom:1px;height:2px;border-radius:2px;background:var(--own);transform:scaleX(0);transition:transform .25s var(--zoom)}
header.top .tab[aria-current="true"]{background:transparent}
header.top .tab[aria-current="true"]::after{transform:scaleX(1)}
header.top .tab .mono{font-weight:600}
.cmdbtn{appearance:none;display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 6px 0 11px;border-radius:8px;cursor:pointer;
  border:1px solid var(--rule);background:var(--glass);color:var(--ink-3);font-size:14px;font-weight:500;
  transition:transform .22s var(--zoom),border-color .2s,color .2s}
.cmdbtn:hover{transform:scale(1.08);color:var(--ink);border-color:var(--ink-3);position:relative;z-index:1}
.cmdbtn span{min-width:3.5em;text-align:left}
@media (max-width:1520px){.cmdbtn span,.cmdbtn kbd{display:none}.cmdbtn{width:34px;padding:0;justify-content:center}}
/* hero scope: channel switches, run/stop, timebase, readout */
.scope-bar .sch{appearance:none;border:1px solid transparent;background:none;font:inherit;font-weight:500;cursor:pointer;display:inline-flex;align-items:center;gap:7px;
  padding:3px 8px;border-radius:6px;transition:transform .22s var(--zoom),background .2s,opacity .2s}
.scope-bar .sch::before{content:"";width:10px;height:10px;border-radius:3px;border:1.5px solid currentColor;background:currentColor}
.scope-bar .sch:hover{transform:scale(1.1);background:rgba(255,255,255,.07)}
.scope-bar .sch[aria-pressed="false"]{opacity:.5;text-decoration:line-through}
.scope-bar .sch[aria-pressed="false"]::before{background:transparent}
.scope-ctl{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;padding:10px 16px;border-top:1px solid rgba(255,255,255,.08);font-family:var(--mono);font-size:13.5px;color:var(--scope-ink)}
.scope-ctl button{appearance:none;font:inherit;font-weight:600;cursor:pointer;color:#E4E4E7;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.16);
  border-radius:6px;padding:3px 10px;transition:transform .22s var(--zoom),background .2s,border-color .2s}
.scope-ctl button:hover{transform:scale(1.1);border-color:rgba(255,255,255,.4)}
.scope-ctl button[aria-pressed="true"]{background:rgba(129,140,248,.2);border-color:var(--s1);color:#C7CBFF}
.sc-run{min-width:84px}
.scope.held .sc-run{background:rgba(251,191,36,.16)!important;border-color:var(--s3)!important;color:var(--s3)!important}
.sc-tb{display:inline-flex;align-items:center;gap:4px}
.sc-l{margin-right:4px;font-weight:500}
.sc-read{margin-left:auto;color:#E4E4E7;font-weight:600;font-variant-numeric:tabular-nums}
.scope canvas{cursor:crosshair;touch-action:pan-y}
/* flatter scope (was 16:10): four lanes still fit, the hero takes less height */
.scope canvas{aspect-ratio:16/7}
@media (max-width:600px){.scope canvas{aspect-ratio:16/8}}
.scope figcaption{position:static;padding:0 16px 12px;opacity:.75}
/* hero stats read like instrument channels */
.hero .stat{position:relative;padding-top:20px}
.hero .stat::before{content:"";position:absolute;left:0;top:0;width:26px;height:2px;background:var(--own);transition:width .3s var(--zoom)}
.hero .stat:hover::before{width:calc(100% - 16px)}
/* NEWS: category filter + grid / list view */
#news{scroll-margin-top:calc(var(--hdrh) + 8px)}
.nfilt{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:0 0 14px}
.nf-cats{display:flex;flex-wrap:wrap;gap:6px;flex:1;min-width:0}
.nf-cats button,.nf-view button{appearance:none;cursor:pointer;font-size:14px;font-weight:500;color:var(--ink-2);background:var(--glass);border:1px solid var(--rule);
  transition:transform .22s var(--zoom),background .2s,color .2s,border-color .2s}
.nf-cats button{padding:4px 12px;border-radius:999px;display:inline-flex;align-items:center;gap:7px}
.nf-cats button .mono{font-size:13.5px;color:var(--ink-3)}
.nf-cats button[aria-pressed="true"]{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.nf-cats button[aria-pressed="true"] .mono{color:inherit;opacity:.75}
.nf-view{display:inline-flex;gap:4px}
.nf-view button{width:34px;height:32px;display:grid;place-items:center;border-radius:8px}
.nf-view button[aria-pressed="true"]{color:var(--own);border-color:var(--own);background:var(--own-fill)}
.nf-cats button:hover,.nf-view button:hover{transform:scale(1.1);position:relative;z-index:1}
.news-grid.as-list{grid-template-columns:1fr;gap:8px}
.news-grid.as-list .ncard{flex-direction:row;align-items:stretch}
.news-grid.as-list .ncard .nimg{flex:none;width:150px;aspect-ratio:4/3}
.news-grid.as-list .ncard .ntxt{flex:1;min-width:0;padding:12px 18px;justify-content:center}
.news-grid.as-list .ncard .nex{-webkit-line-clamp:1}
.news-grid.as-list .ncard:hover{transform:translateX(4px) scale(1.01)}
@media (max-width:560px){.news-grid.as-list .ncard .nimg{width:96px}}
/* footer: shortcut cheat line */
.foot-keys{display:flex;flex-wrap:wrap;gap:6px 16px;margin-top:14px;font-size:13.5px;font-weight:500;color:var(--ink-3)}
.foot-keys span{display:inline-flex;align-items:center;gap:6px}
/* IDE-style status bar */
body{padding-bottom:32px}
body.editing .sbar{display:none}
.sbar{position:fixed;left:0;right:0;bottom:0;z-index:45;height:32px;display:flex;align-items:center;gap:2px;padding:0 10px calc(env(safe-area-inset-bottom,0px));
  background:color-mix(in srgb,var(--paper) 86%,transparent);backdrop-filter:blur(14px) saturate(1.4);-webkit-backdrop-filter:blur(14px) saturate(1.4);
  border-top:1px solid var(--rule);font-size:13.5px;color:var(--ink-2)}
.sb-sec{display:inline-flex;align-items:center;gap:8px;min-width:0;padding:0 8px}
.sb-sec b{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:13.5px}
.sb-led{width:8px;height:8px;border-radius:50%;background:var(--own);box-shadow:0 0 0 3px var(--own-fill);flex:none}
.sb-pos{padding:0 8px;color:var(--ink-3);font-weight:500;white-space:nowrap}
.sb-gap{flex:1}
.sb-item{appearance:none;border:none;background:none;font-size:13.5px;font-weight:500;color:var(--ink-2);padding:3px 9px;border-radius:5px;white-space:nowrap;cursor:pointer;
  transition:transform .22s var(--zoom),background .2s,color .2s}
button.sb-item:hover{background:var(--rule-2);color:var(--ink);transform:scale(1.1)}
.sb-clock{cursor:default;color:var(--ink-3)}
.sb-item .ok{color:#16A34A}.sb-item .warn{color:var(--partner)}
:root[data-theme="dark"] .sb-item .ok{color:#4ADE80}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .sb-item .ok{color:#4ADE80}}
@media (max-width:760px){.sb-pos,.sb-clock,#sbLang,#sbMode{display:none}}
/* back-to-top: always floating at the right edge, above the status bar */
.totop{position:fixed;right:max(16px,env(safe-area-inset-right,0px));bottom:calc(32px + 16px + env(safe-area-inset-bottom,0px));z-index:44;
  font-weight:600;padding:10px 16px;background:var(--panel);color:var(--ink);border-color:var(--rule);
  box-shadow:0 1px 2px rgba(9,9,11,.06),0 10px 28px -10px rgba(9,9,11,.35)}
.totop:hover{position:fixed;z-index:44;background:var(--ink);color:var(--paper);border-color:var(--ink)}
body.editing .totop{bottom:calc(76px + env(safe-area-inset-bottom,0px))}
/* a backdrop-filter on the footer would pin the fixed button to the footer instead of the window; the footer is transparent anyway */
footer.foot{backdrop-filter:none;-webkit-backdrop-filter:none}
@media (max-width:760px){.totop{padding:9px 13px;font-size:13.5px}}
/* search palette + shortcut help */
.cmdk{position:fixed;inset:0;z-index:80;display:flex;justify-content:center;align-items:flex-start;padding:12vh 16px 24px;background:rgba(9,9,11,.42);
  backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px)}
.ck-card{position:relative;width:min(680px,100%);max-height:72vh;display:flex;flex-direction:column;border-radius:14px;border:1px solid var(--rule);background:var(--panel);
  box-shadow:0 30px 80px -24px rgba(0,0,0,.55);overflow:hidden;animation:swap .25s cubic-bezier(.2,.7,.2,1) both}
.ck-top{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid var(--rule);color:var(--ink-3)}
.ck-top input{flex:1;min-width:0;border:none;outline:none;background:none;font:inherit;font-size:17px;font-weight:500;color:var(--ink)}
.ck-list{overflow:auto;padding:6px;flex:1}
.ck-grp{font-family:var(--mono);font-size:13px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);padding:10px 10px 4px}
.ck-it{display:flex;align-items:center;gap:12px;padding:8px 10px;border-radius:8px;cursor:pointer;min-width:0}
.ck-it .ck-k{flex:none;min-width:38px;text-align:center;font-family:var(--mono);font-size:13px;font-weight:600;padding:2px 6px;border-radius:5px;border:1px solid var(--rule);color:var(--ink-2)}
.ck-it .ck-t{flex:1;min-width:0;display:flex;flex-direction:column}
.ck-it b{font-size:15px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ck-it small{font-size:13.5px;font-weight:500;color:var(--ink-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ck-it .ck-go{flex:none;font-family:var(--mono);color:var(--ink-3);opacity:0}
.ck-it[aria-selected="true"]{background:var(--own-fill)}
.ck-it[aria-selected="true"] .ck-k{border-color:var(--own);color:var(--own)}
.ck-it[aria-selected="true"] b{color:var(--own)}
.ck-it[aria-selected="true"] .ck-go{opacity:1;color:var(--own)}
.ck-it mark{background:none;color:var(--own);text-decoration:underline;text-underline-offset:3px}
.ck-none{padding:22px;text-align:center;color:var(--ink-3);font-weight:500}
.ck-foot{display:flex;flex-wrap:wrap;gap:6px 16px;padding:9px 16px;border-top:1px solid var(--rule);font-size:13.5px;font-weight:500;color:var(--ink-3);background:color-mix(in srgb,var(--paper) 60%,var(--panel))}
.ck-foot span{display:inline-flex;align-items:center;gap:6px}
.kh-card{width:min(520px,100%)}
.kh-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px 12px;border-bottom:1px solid var(--rule)}
.kh-head b{font-size:18px}
.kh-head .nm-x{position:static}
.kh-list{display:grid;grid-template-columns:auto 1fr;gap:10px 18px;align-items:center;margin:0;padding:16px 18px 20px;overflow:auto}
.kh-list dt{display:flex;gap:4px;justify-content:flex-end;align-items:center}
.kh-list dd{margin:0;font-weight:500;color:var(--ink-2)}
@media (prefers-reduced-motion:reduce){.ck-card{animation:none}}