/* STELLAR home: the machine room.
   Always dark. The page is a console with screens on it, and screens are dark
   in daylight too. Serif display over IBM Plex (the RCA era's contemporaries
   wrote their manuals in faces like these), phosphor colour only where the machine
   itself is drawing. */

body.home{
  --k-bg:#07080b; --k-panel:#0d0f14; --k-panel2:#11141b; --k-line:#1c212c; --k-line2:#262c39;
  --k-ink:#e9e4d8; --k-soft:#9097a6; --k-dim:#5d6473;
  --k-amber:#ffb547; --k-cyan:#5fe3d0; --k-rose:#ff7a90; --k-lime:#b8f36a;
  --serif:"Instrument Serif", "Iowan Old Style", Georgia, serif;
  --plex:"IBM Plex Sans", system-ui, sans-serif;
  --pmono:"IBM Plex Mono", ui-monospace, Menlo, monospace;
  background:var(--k-bg); color:var(--k-ink); font-family:var(--plex);
  background-image:
    radial-gradient(1200px 600px at 78% -10%, rgba(95,227,208,.07), transparent 60%),
    radial-gradient(900px 500px at 5% 0%, rgba(255,181,71,.06), transparent 60%);
  background-repeat:no-repeat;
}
body.home .mono, body.home code{font-family:var(--pmono)}
body.home a{color:var(--k-cyan)}
body.home .nav{background:rgba(7,8,11,.82); border-bottom-color:var(--k-line); backdrop-filter:blur(8px)}
body.home .nav a.tab{color:var(--k-soft)}
body.home .nav a.tab:hover{background:var(--k-panel2); color:var(--k-ink)}
body.home .nav a.tab.active{background:var(--k-panel2); color:var(--k-ink); box-shadow:inset 0 -2px 0 var(--k-amber)}
body.home .brand{color:var(--k-amber)}
body.home button{font-family:var(--pmono)}

/* ---------------------------------------------------------------- hero */
.h-hero{max-width:1320px; margin:0 auto; padding:44px 24px 26px; display:grid;
  grid-template-columns:minmax(0,1.7fr) minmax(0,1fr); gap:18px 48px; align-items:end}
.h-eyebrow{grid-column:1/-1}
.h-eyebrow{display:flex; flex-wrap:wrap; gap:6px 18px; font-family:var(--pmono); font-size:12px;
  letter-spacing:.14em; text-transform:uppercase; color:var(--k-soft)}
.h-eyebrow span:first-child{color:var(--k-amber)}
.h-eyebrow span+span::before{content:"/"; margin-right:18px; color:var(--k-line2)}
.h-title{font-family:var(--serif); font-weight:400; font-size:clamp(40px,5.2vw,78px); line-height:.95;
  letter-spacing:-.015em; margin:4px 0 0; color:#f4efe3}
.h-title em{color:var(--k-amber); font-style:italic}
.h-lede{max-width:560px; font-size:17px; line-height:1.62; color:#c6c2b8; margin:0 0 6px}
.h-hero > *{animation:rise .9s cubic-bezier(.2,.7,.2,1) both}
.h-hero > :nth-child(2){animation-delay:.08s}
.h-hero > :nth-child(3){animation-delay:.18s}
@keyframes rise{from{opacity:0; transform:translateY(14px)} to{opacity:1; transform:none}}

/* ---------------------------------------------------------------- console */
.console{max-width:1320px; margin:12px auto 0; padding:0 24px; animation:rise 1s .28s both}
.console-top{display:flex; align-items:center; gap:14px; flex-wrap:wrap; justify-content:space-between;
  border:1px solid var(--k-line); border-bottom:none; border-radius:14px 14px 0 0;
  background:linear-gradient(180deg,#12151c,#0d0f14); padding:10px 14px}
.speed{display:flex; align-items:center; gap:4px; flex-wrap:wrap}
.speed-lbl{font-family:var(--pmono); font-size:11px; letter-spacing:.14em; text-transform:uppercase; color:var(--k-dim); margin-right:6px}
.speed button, .console-btns button, .d-controls button{
  background:transparent; border:1px solid var(--k-line2); color:var(--k-soft); border-radius:8px;
  padding:6px 11px; font-size:12.5px; cursor:pointer; transition:all .15s}
.speed button:hover, .console-btns button:hover, .d-controls button:hover{color:var(--k-ink); border-color:#3a4252}
.speed button.on, .speed button[aria-checked="true"]{background:var(--k-amber); color:#1a1305; border-color:var(--k-amber); font-weight:600}
.console-btns{display:flex; gap:6px}
/* the repeated clock rows - above the CIDP panel and the 1802 machine-code layer */
.speed-copy{gap:3px; margin:0 0 8px}
.speed-copy .speed-lbl{font-size:10px; margin-right:4px}
.speed-copy button{padding:3px 7px; font-size:11px; border-radius:6px}
.die-wrap .speed-copy{border-top:1px solid var(--k-line); padding-top:8px}

.console-body{display:grid; grid-template-columns:minmax(0,1fr) 392px; gap:0;
  border:1px solid var(--k-line); background:var(--k-panel)}
.quad{display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--k-line); border-right:1px solid var(--k-line)}

.crt{background:#050607; display:flex; flex-direction:column; min-width:0; position:relative}
.crt-h{display:flex; align-items:center; gap:8px; padding:7px 12px; font-size:12px; color:var(--k-soft);
  border-bottom:1px solid #12151b; background:#0a0c10; white-space:nowrap}
.crt-h b{color:var(--vm); font-family:var(--pmono); font-weight:600; letter-spacing:.04em}
.crt-name{color:var(--k-ink)}
.crt-addr{color:var(--k-dim); font-size:11px}
.crt-ops{font-size:11px; color:var(--k-dim)}
.dot{width:7px; height:7px; border-radius:50%; background:var(--vm); box-shadow:0 0 8px var(--vm); flex:none}
.grow{flex:1}
.crt-screen{position:relative; padding:10px 10px 12px; outline:none; cursor:text; overflow:hidden}
.crt-screen::after{content:""; position:absolute; inset:0; pointer-events:none;
  background:repeating-linear-gradient(180deg, rgba(255,255,255,.028) 0 1px, transparent 1px 3px);
  box-shadow:inset 0 0 60px rgba(0,0,0,.75)}
.crt .vt{margin:0; font-family:var(--pmono); font-size:9px; line-height:1.18; color:var(--vm);
  white-space:pre; overflow:hidden; height:calc(24 * 1.18em);
  text-shadow:0 0 6px color-mix(in srgb, var(--vm) 55%, transparent)}
.crt .vt .rev{background:var(--vm); color:#050607; text-shadow:none}
.crt-hint{position:absolute; right:10px; bottom:6px; font-size:10.5px; font-family:var(--pmono);
  color:var(--k-dim); opacity:.0; transition:opacity .2s}
.crt:hover .crt-hint{opacity:1}
.crt.focus{box-shadow:inset 0 0 0 1px var(--vm)}
.crt.focus .crt-h{background:color-mix(in srgb, var(--vm) 12%, #0a0c10)}

/* the die */
.die-wrap{margin:0; padding:12px 14px 14px; display:flex; flex-direction:column; gap:8px; background:var(--k-panel)}
.die-cap{display:flex; justify-content:space-between; align-items:baseline; font-size:12px; color:var(--k-dim)}
.die-cap b{font-family:var(--serif); font-weight:400; font-size:22px; color:var(--k-ink); font-style:italic}
.die-frame{position:relative; display:grid; grid-template-columns:auto 1fr; gap:8px; flex:1; min-height:0}
#die{width:224px; height:448px; image-rendering:pixelated; border:1px solid var(--k-line2); border-radius:3px;
  display:block; box-shadow:0 0 0 4px #0a0c10, 0 0 0 5px var(--k-line)}
.die-labels{position:relative; height:448px}
.dl{position:absolute; left:0; right:0; border-top:1px solid var(--k-line2); font-size:11px; padding-top:1px;
  display:flex; justify-content:space-between; gap:6px; color:var(--k-soft); overflow:hidden}
.dl i{font-style:normal; color:var(--k-dim); font-size:10px}
.dl.vm span{color:var(--vm)}
.dl.vm{border-top-color:color-mix(in srgb, var(--vm) 40%, transparent)}
.die-read{font-size:11px; color:var(--k-soft); min-height:2.6em; line-height:1.3}
.die-read b{color:var(--k-ink)}

/* telemetry */
.telemetry{border:1px solid var(--k-line); border-top:none; border-radius:0 0 14px 14px; background:#0b0d11; padding:14px 16px 16px}
.tl-row{display:grid; grid-template-columns:repeat(5,minmax(0,1fr)); gap:14px}
.tm-k{font-size:10.5px; letter-spacing:.12em; text-transform:uppercase; color:var(--k-dim); font-family:var(--pmono)}
.tm-v{font-family:var(--pmono); font-size:22px; color:var(--k-ink); font-variant-numeric:tabular-nums; margin-top:2px}
#tmTime{color:var(--k-amber)}
.timeline-wrap{margin-top:14px}
.timeline-head{display:flex; gap:12px; align-items:baseline; font-size:11.5px; color:var(--k-soft); margin-bottom:6px; flex-wrap:wrap}
.muted-d{color:var(--k-dim)}
#timeline{width:100%; height:44px; display:block; background:#07080b; border:1px solid var(--k-line); border-radius:6px}
.share{display:flex; gap:2px; margin-top:6px; height:20px}
.sh{background:color-mix(in srgb, var(--vm) 22%, transparent); border-top:2px solid var(--vm); min-width:0;
  font-size:10.5px; font-family:var(--pmono); color:var(--vm); padding:2px 6px; white-space:nowrap; overflow:hidden;
  transition:flex-grow .6s ease}
.console-note{max-width:900px; color:var(--k-soft); font-size:14px; line-height:1.6; margin:16px 2px 0}
.console-note b{color:var(--k-ink); font-weight:500}
.nowrap{white-space:nowrap}
.boot-err{grid-column:1/-1; padding:30px; color:var(--k-rose); font-family:var(--pmono); font-size:13px; background:var(--k-panel)}

/* ---------------------------------------------------------------- stories */
.h-main{max-width:1320px; margin:0 auto; padding:40px 24px 60px}
.story{display:grid; grid-template-columns:90px minmax(0,780px); gap:10px 28px; padding:64px 0 24px;
  border-top:1px solid var(--k-line); margin-top:40px}
.story.wide{grid-template-columns:90px minmax(0,1fr)}
.story-num{font-family:var(--serif); font-size:64px; line-height:.9; color:var(--k-line2); font-style:italic}
.story h2{font-family:var(--serif); font-weight:400; font-size:clamp(34px,4.2vw,52px); line-height:1; margin:0 0 18px; letter-spacing:-.01em}
.story p{font-size:17px; line-height:1.68; color:#cfcabf; margin:0 0 14px; max-width:720px}
.story p.dim{color:var(--k-soft); font-size:15.5px}
.story em{color:var(--k-amber); font-style:italic}
.story code{font-size:.9em; color:var(--k-ink); background:var(--k-panel2); border:1px solid var(--k-line); padding:1px 5px; border-radius:4px}
pre.lst{background:#050607; border:1px solid var(--k-line); border-left:3px solid var(--k-rose); border-radius:8px;
  padding:14px 16px; font-family:var(--pmono); font-size:12.5px; line-height:1.6; overflow-x:auto; color:var(--k-soft); margin:8px 0 0}
pre.lst .c{color:#b9b4a8}

/* descent */
.d-controls{display:flex; align-items:center; gap:8px; flex-wrap:wrap; margin:26px 0 14px}
.vm-tabs{display:flex; gap:4px; flex-wrap:wrap}
.vm-tabs button{display:flex; align-items:center; gap:7px; background:var(--k-panel); border:1px solid var(--k-line2);
  color:var(--k-soft); border-radius:999px; padding:6px 13px 6px 10px; font-size:12.5px; cursor:pointer}
.vm-tabs button[aria-selected="true"]{border-color:var(--vm); color:var(--k-ink); background:color-mix(in srgb, var(--vm) 12%, var(--k-panel))}
.vm-tabs .t-n{color:var(--k-dim)}
.vm-tabs button[aria-selected="true"] .t-n{color:var(--vm)}
.d-controls button.on{background:var(--k-cyan); color:#04211d; border-color:var(--k-cyan)}
#descent.frozen .layer{border-color:#24404a}

.layers{display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1.05fr); grid-template-rows:auto auto; gap:14px;
  grid-template-areas:"a c" "b c" "d d"}
#L1{grid-area:a} #L2{grid-area:b} #L3{grid-area:c} #L4{grid-area:d}
.layer{background:var(--k-panel); border:1px solid var(--k-line); border-radius:12px; padding:14px 16px; min-width:0; transition:border-color .3s}
.layer-h{display:flex; align-items:baseline; gap:10px; font-size:13px; color:var(--k-ink); font-weight:500; margin-bottom:10px; flex-wrap:wrap}
.ln{font-family:var(--serif); font-style:italic; font-size:24px; color:var(--k-amber); line-height:1}
.lsub{color:var(--k-dim); font-weight:400; font-size:12px}

.bytecode{font-size:12.5px}
.bc{display:grid; grid-template-columns:48px minmax(0,1fr) 110px 62px; gap:8px; padding:3px 6px; border-radius:4px; color:var(--k-soft)}
.bc.hd{color:var(--k-dim); font-size:10px; letter-spacing:.1em; text-transform:uppercase}
.bc .n{color:var(--k-ink)}
.bc .c{text-align:right; color:var(--k-dim)}
.bc.cur{background:color-mix(in srgb, var(--k-amber) 14%, transparent); color:var(--k-ink)}
.bc.cur .n{color:var(--k-amber)}

.op-top{display:flex; align-items:baseline; gap:12px; flex-wrap:wrap}
.op-hex{font-size:15px; color:var(--k-dim)}
.op-name{font-family:var(--serif); font-size:38px; line-height:1; color:var(--k-amber)}
.op-grp{font-size:12px; color:var(--k-dim)}
.op-desc{font-size:14.5px !important; color:#cfcabf; margin:10px 0 12px !important}
.op-stats{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:10px; border-top:1px solid var(--k-line); padding-top:10px}
.op-stats div{display:flex; flex-direction:column}
.op-stats b{font-family:var(--pmono); font-size:17px; font-weight:500; color:var(--k-ink)}
.op-stats span{font-size:11px; color:var(--k-dim)}
.op-foot{font-size:12px !important; color:var(--k-dim) !important; margin:10px 0 0 !important; font-family:var(--pmono)}

.phase-bar{display:flex; gap:2px; height:22px; margin-bottom:8px}
.pb{font-size:10.5px; font-family:var(--pmono); padding:3px 6px; white-space:nowrap; overflow:hidden; border-radius:3px; min-width:0}
.pb.fetch,.ph-h.fetch{background:rgba(95,227,208,.13); color:var(--k-cyan)}
.pb.handler,.ph-h.handler{background:rgba(255,181,71,.14); color:var(--k-amber)}
.pb.scrt,.ph-h.scrt{background:rgba(184,243,106,.12); color:var(--k-lime)}
.pb.sched,.ph-h.sched{background:rgba(255,122,144,.13); color:var(--k-rose)}
.m1802{height:520px; overflow:auto; font-size:12px; line-height:1.55; border-top:1px solid var(--k-line); padding-top:4px}
.ph-h{display:flex; justify-content:space-between; font-size:10.5px; letter-spacing:.1em; text-transform:uppercase;
  padding:3px 8px; margin:6px 0 2px; border-radius:3px; position:sticky; top:0}
.mi{display:grid; grid-template-columns:44px 74px minmax(0,1fr); gap:8px; padding:0 8px; color:var(--k-soft)}
.mi .a{color:var(--k-dim)}
.mi .t{color:var(--k-ink)}
.mi.handler .t{color:#f1dfbd}
.more{padding:10px 8px; color:var(--k-dim); font-size:12px}

.coregrid{display:grid; grid-template-columns:repeat(32,minmax(0,1fr)); gap:2px; font-size:10.5px}
.coregrid span{text-align:center; padding:3px 0; border-radius:2px; color:var(--k-dim); background:#090b0e; transition:background .25s, color .25s}
.coregrid span.reg{color:#a9b3c6; background:#10141c}
.coregrid span.acc{color:var(--k-amber); background:rgba(255,181,71,.10)}
.coregrid span.da{color:var(--k-lime); background:rgba(184,243,106,.08)}
.coregrid span.pl{color:var(--k-cyan); background:rgba(95,227,208,.09)}
.coregrid span.flag{color:#c9a7ff; background:rgba(201,167,255,.08)}
.coregrid span.ma{color:var(--k-rose); background:rgba(255,122,144,.09)}
.coregrid span.q{color:#fff; background:rgba(255,255,255,.1)}
.coregrid span.hot{background:#f4eadb !important; color:#111 !important; transition:none}
.core-legend{display:flex; gap:6px 16px; flex-wrap:wrap; margin-top:10px; font-size:11.5px; color:var(--k-soft)}
.lg i{display:inline-block; width:9px; height:9px; border-radius:2px; margin-right:6px; vertical-align:-1px}
.lg.reg i{background:#a9b3c6} .lg.acc i{background:var(--k-amber)} .lg.da i{background:var(--k-lime)}
.lg.pl i{background:var(--k-cyan)} .lg.flag i{background:#c9a7ff} .lg.ma i{background:var(--k-rose)} .lg.q i{background:#fff}

/* by hand */
.facts{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:1px; background:var(--k-line);
  border:1px solid var(--k-line); border-radius:12px; overflow:hidden; margin:22px 0}
.fact{background:var(--k-panel); padding:18px 16px}
.fact b{display:block; font-family:var(--serif); font-weight:400; font-size:48px; line-height:1; color:var(--k-amber)}
.fact span{font-size:13px; color:var(--k-soft); display:block; margin-top:8px; line-height:1.4}

/* workbench */
.bench{border-top:1px solid var(--k-line); margin-top:56px; padding-top:56px}
.bench-h{font-family:var(--serif); font-weight:400; font-size:44px; margin:0}
.bench-sub{color:var(--k-soft); margin:6px 0 22px}
.bench-grid{display:grid; grid-template-columns:repeat(5,minmax(0,1fr)); gap:12px}
.bcard{display:block; background:var(--k-panel); border:1px solid var(--k-line); border-radius:12px; padding:16px;
  color:var(--k-ink) !important; transition:border-color .2s, transform .2s}
.bcard:hover{border-color:var(--k-amber); transform:translateY(-2px); text-decoration:none}
.bk{font-family:var(--pmono); font-size:10.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--k-dim)}
.bcard h3{font-family:var(--serif); font-weight:400; font-size:26px; margin:6px 0 6px}
.bcard p{font-size:13.5px; color:var(--k-soft); margin:0; line-height:1.5}
.bcard code{font-size:.9em}

.h-foot{border-top:1px solid var(--k-line) !important; color:var(--k-dim) !important; background:transparent}
.h-foot a{color:var(--k-soft) !important}

/* ---------------------------------------------------------------- responsive */
@media (max-width:1080px){
  .console-body{grid-template-columns:1fr}
  .quad{border-right:none; border-bottom:1px solid var(--k-line)}
  .die-frame{grid-template-columns:auto 1fr}
  .bench-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .layers{grid-template-columns:1fr; grid-template-areas:"a" "b" "c" "d"}
  .m1802{height:420px}
}
@media (max-width:900px){
  .h-hero{grid-template-columns:1fr}
}
@media (max-width:720px){
  .h-hero{padding:32px 16px 20px}
  #die{width:128px; height:256px}
  .die-labels{height:256px}
  .cidp-grid{font-size:9.5px}
  .console, .h-main{padding-left:16px; padding-right:16px}
  .quad{grid-template-columns:1fr}
  .tl-row{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tm-v{font-size:18px}
  .story, .story.wide{grid-template-columns:1fr}
  .story-num{font-size:40px}
  .facts{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bench-grid{grid-template-columns:1fr}
  .coregrid{grid-template-columns:repeat(16,minmax(0,1fr))}
  .op-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bc{grid-template-columns:44px minmax(0,1fr) 90px 44px; font-size:11.5px}
}
@media (prefers-reduced-motion:reduce){
  .h-hero > *, .console{animation:none}
}
body.home .nav-inner{max-width:1320px; padding-left:24px; padding-right:24px}
@media (max-width:720px){
  .h-eyebrow{font-size:11px; gap:4px 12px}
  .h-eyebrow span+span::before{content:none}
  .speed button{padding:5px 8px}
}

/* the CIDP page, byte by byte, under the die */
.cidp{border-top:1px solid var(--k-line); padding-top:8px}
.cidp-h{display:flex; align-items:baseline; gap:8px; font-size:11px; color:var(--k-dim); margin-bottom:5px}
.cidp-h b{font-family:var(--serif); font-style:italic; font-weight:400; font-size:18px; color:var(--k-ink)}
.cidp-sum{margin-left:auto; color:var(--k-soft); font-size:10.5px}
.cidp-grid{display:grid; grid-template-columns:34px repeat(16,minmax(0,1fr)); gap:1px 2px; font-size:10px; line-height:1.5}
.cidp-grid .ra{color:var(--k-dim); font-size:9.5px}
.cidp-grid .cb{text-align:center; color:#4a5160; border-radius:2px; cursor:default; transition:background .25s, color .25s}
.cidp-grid .cb.nz{color:var(--k-soft)}
.cidp-grid .vmrow{color:color-mix(in srgb, var(--vm) 75%, #fff)}
.cidp-grid .cb.vmrow.nz{color:var(--vm)}
.cidp-grid .cb.state{box-shadow:inset 0 -1px 0 var(--vm)}
.cidp-grid .cb.cur{background:color-mix(in srgb, var(--vm) 22%, transparent)}
.cidp-grid .cb.sys.nz{color:var(--k-ink)}
.cidp-grid .cb.hot{background:#f4eadb; color:#111; transition:none}
.cidp-grid .gap{grid-column:1/-1; color:#303644; font-size:9px; line-height:1.1; padding-left:2px}