@font-face{font-family:"Newsreader";font-style:normal;font-weight:200 800;font-display:swap;src:url(fonts/newsreader-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Newsreader";font-style:normal;font-weight:200 800;font-display:swap;src:url(fonts/newsreader-latin-ext.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Newsreader";font-style:italic;font-weight:400;font-display:swap;src:url(fonts/newsreader-italic-400-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Newsreader";font-style:italic;font-weight:400;font-display:swap;src:url(fonts/newsreader-italic-400-latin-ext.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Plex Mono";font-style:normal;font-weight:400;font-display:swap;src:url(fonts/IBMPlexMono-Regular.woff2) format("woff2")}

/* Warm paper by day; the machine's black enamel and lamp amber by night. */
:root{
  --bg:#f5f0e6;--bg-2:#ece4d3;--card:#fbf8f2;--ink:#1a1714;--ink-2:#403a31;--rule:#d3c7b1;--rule-2:#877b66;
  --accent:#8a4b00;--link:#173f8a;--lamp:#b36b00;--lamp-glow:rgba(240,182,74,.55);--go:#b36b00;--back:#1f5fa8;
  --metal:#2a2520;--metal-ink:#f3ecdf;--key:#e9e1d1;--key-ink:#1a1714;
  --bar-bg:rgba(245,240,230,.93);color-scheme:light;
}
:root[data-theme="dark"]{
  --bg:#141210;--bg-2:#1d1a16;--card:#1f1b17;--ink:#f2ebdf;--ink-2:#cfc5b4;--rule:#3a342c;--rule-2:#7c7262;
  --accent:#f4bd5a;--link:#a9c4ff;--lamp:#f4bd5a;--lamp-glow:rgba(244,189,90,.5);--go:#f4bd5a;--back:#86b6ff;
  --metal:#0c0b0a;--metal-ink:#f3ecdf;--key:#2b2621;--key-ink:#f2ebdf;
  --bar-bg:rgba(20,18,16,.92);color-scheme:dark;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#141210;--bg-2:#1d1a16;--card:#1f1b17;--ink:#f2ebdf;--ink-2:#cfc5b4;--rule:#3a342c;--rule-2:#7c7262;
    --accent:#f4bd5a;--link:#a9c4ff;--lamp:#f4bd5a;--lamp-glow:rgba(244,189,90,.5);--go:#f4bd5a;--back:#86b6ff;
    --metal:#0c0b0a;--metal-ink:#f3ecdf;--key:#2b2621;--key-ink:#f2ebdf;
    --bar-bg:rgba(20,18,16,.92);color-scheme:dark;
  }
}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1.1875rem/1.62 "Newsreader",Georgia,serif;font-optical-sizing:auto}
a{color:var(--link);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:3px}
img{max-width:100%;height:auto;display:block}
b,strong{font-weight:640}
.num,.mono{font-family:"Plex Mono",ui-monospace,monospace;font-size:.86em;letter-spacing:-.01em}
.skip{position:absolute;left:-999px;top:0;background:var(--card);color:var(--ink);padding:.5rem .8rem;z-index:99}
.skip:focus{left:.5rem;top:.5rem}

/* ---- top bar ---- */
.topbar{position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:.9rem;height:2.75rem;padding:0 1rem;background:var(--bar-bg);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--rule);font-size:.9rem}
.topbar a{color:var(--ink);text-decoration:none}
.topbar .home{font-weight:600;white-space:nowrap}
.topnav{display:flex;gap:1rem;overflow-x:auto;scrollbar-width:none;min-width:0;flex:0 1 auto}
.topnav::-webkit-scrollbar{display:none}
.topnav a{white-space:nowrap;color:var(--ink-2)}
.topnav a:hover,.topnav a[aria-current="true"]{color:var(--ink);text-decoration:underline}
.spacer{flex:1 1 0}
.chip{border:1px solid var(--rule-2);border-radius:99px;padding:.1rem .6rem;font-size:.82rem;white-space:nowrap}
.icon-btn{display:inline-grid;place-items:center;width:2.75rem;height:2.75rem;margin-right:-.6rem;background:none;border:0;color:var(--ink);cursor:pointer;border-radius:50%}
.icon-btn svg[hidden]{display:none}
@media (max-width:640px){.topnav{display:none}.topbar{gap:.6rem}}

/* ---- right rail ---- */
.rail{position:fixed;right:.9rem;top:50%;transform:translateY(-50%);z-index:30;display:flex;flex-direction:column;gap:.55rem}
.rail a{display:flex;align-items:center;justify-content:flex-end;gap:.5rem;text-decoration:none;color:var(--ink-2);font-size:.8rem;min-height:24px}
.rail a span{opacity:0;transform:translateX(6px);transition:opacity .2s,transform .2s;background:var(--card);padding:.1rem .45rem;border-radius:4px;border:1px solid var(--rule);white-space:nowrap}
.rail a:hover span,.rail a:focus-visible span{opacity:1;transform:none}
.rail i{width:8px;height:8px;border-radius:50%;border:1.5px solid var(--rule-2);flex:none;transition:background .2s,transform .2s}
.rail a[aria-current="true"] i{background:var(--accent);border-color:var(--accent);transform:scale(1.3)}
@media (max-width:1100px){.rail{display:none}}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---- article ---- */
.hero{max-width:46rem;margin:0 auto;padding:4.5rem 1.25rem 1rem}
.kicker{font:400 .8rem/1 "Plex Mono",ui-monospace,monospace;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin:0 0 1rem}
h1{font-size:clamp(2.5rem,7vw,4.4rem);line-height:1.02;font-weight:560;letter-spacing:-.02em;margin:0 0 1.2rem}
.dek{font-size:1.3rem;line-height:1.5;color:var(--ink-2);margin:0 0 1rem}
.byline{font-size:.9rem;color:var(--ink-2)}
.block{max-width:42rem;margin:0 auto;padding:4rem 1.25rem 1rem}
h2{font-size:clamp(1.6rem,4vw,2.15rem);line-height:1.15;font-weight:560;margin:0 0 1.1rem;letter-spacing:-.01em}
h2 .anchor{color:inherit;text-decoration:none}
h2 .anchor:hover::after{content:" #";color:var(--rule-2)}
p{margin:0 0 1.1rem}
figure{margin:2rem 0}
.photo img{border-radius:6px;background:var(--bg-2);width:100%;height:auto}
.photo.portrait{max-width:20rem}
figcaption{font-size:.93rem;line-height:1.45;color:var(--ink-2);margin-top:.6rem}
figcaption .cr{display:block;font-size:.8rem;margin-top:.25rem}
.small{font-size:.85rem;color:var(--ink-2)}
.tl{font:400 .74rem/1.3 "Plex Mono",ui-monospace,monospace;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2);margin:0 0 .35rem;display:block}

/* ---- buttons ---- */
button{font:inherit}
.primary{font:500 1rem/1 "Newsreader",Georgia,serif;background:var(--ink);color:var(--bg);border:0;border-radius:6px;padding:.75rem 1.1rem;min-height:44px;cursor:pointer}
.primary:disabled{opacity:.55;cursor:progress}
.ghost{background:none;border:1px solid var(--rule-2);color:var(--ink);border-radius:6px;padding:.4rem .8rem;min-height:44px;cursor:pointer;font-size:.9rem}
.ctlrow,.ctl41{display:flex;flex-wrap:wrap;align-items:center;gap:.8rem;margin-bottom:1rem}

/* ---- widgets break out of the text column ---- */
.widget{background:var(--card);border:1px solid var(--rule);border-radius:10px;padding:1.1rem;margin:2rem -1.25rem}
@media (min-width:760px){.widget{margin-left:-6rem;margin-right:-6rem;padding:1.5rem}}
@media (min-width:1180px){.widget.machine{margin-left:-14rem;margin-right:-14rem}}

/* ---- the machine ---- */
.machine{background:var(--metal);color:var(--metal-ink);border-color:var(--metal)}
.machine figcaption{color:#d8cfbf}
.machine:focus{outline:none}
.rotors{display:flex;flex-wrap:wrap;gap:.8rem 1.1rem;align-items:flex-end}
.rotor{display:flex;flex-direction:column;align-items:center;gap:.3rem;font-size:.8rem}
.rotor label{color:#d8cfbf;font-size:.78rem}
.rotor select{background:#1c1814;color:var(--metal-ink);border:1px solid #6b604f;border-radius:4px;padding:.3rem .35rem;font:400 .9rem "Plex Mono",monospace;min-height:36px}
.rotor select.small{font-size:.78rem}
.win{display:flex;flex-direction:column;align-items:center;background:#1c1814;border:1px solid #6b604f;border-radius:6px}
.win button{background:none;border:0;color:#d8cfbf;width:44px;height:30px;cursor:pointer;font-size:.8rem}
.win output{font:400 1.7rem/1 "Plex Mono",monospace;color:#fff;background:#f3ecdf;color:#1a1714;width:2.4rem;text-align:center;padding:.3rem 0;border-radius:3px}
.dup{color:#ffcf7a;font-size:.9rem;margin:.6rem 0 0}
.mgrid{display:grid;grid-template-columns:1fr;gap:1.2rem;margin-top:1.2rem}
@media (min-width:980px){.mgrid{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);align-items:start}}
.kbrow{display:flex;justify-content:center;gap:clamp(3px,1vw,8px);margin-bottom:clamp(4px,1vw,8px)}
.lamp,.key{display:inline-grid;place-items:center;width:clamp(28px,8.4vw,44px);height:clamp(28px,8.4vw,44px);border-radius:50%;font:400 clamp(.8rem,2.6vw,1.05rem)/1 "Plex Mono",monospace}
.lamp{background:#3a332b;color:#9d927f;transition:background .08s,color .08s,box-shadow .08s}
.lamp.on{background:#ffd27a;color:#1a1714;box-shadow:0 0 18px 4px rgba(255,200,90,.6)}
.keyboard{margin-top:.9rem}
.key{background:#f3ecdf;color:#1a1714;border:2px solid #0c0b0a;box-shadow:0 3px 0 #6b604f;cursor:pointer;padding:0}
.key:active,.key.down{transform:translateY(2px);box-shadow:0 1px 0 #6b604f}
.plugrow{display:flex;flex-wrap:wrap;gap:.4rem .7rem;align-items:center;margin-top:1rem;font-size:.85rem}
.plugrow label{color:#d8cfbf}
.plugrow input{flex:1 1 12rem;min-width:0;background:#1c1814;color:var(--metal-ink);border:1px solid #6b604f;border-radius:4px;padding:.45rem .5rem;font:400 .95rem "Plex Mono",monospace;text-transform:uppercase;min-height:40px}
.plugrow .small{color:#d8cfbf}
.tapes{margin-top:.9rem;font-size:.85rem}
.tapes p{margin:0 0 .4rem;display:flex;gap:.6rem;align-items:baseline;flex-wrap:wrap}
.tapes .tl{color:#d8cfbf;min-width:6.5rem}
.tapes code{font:400 .95rem "Plex Mono",monospace;color:#fff;overflow-wrap:anywhere;min-width:0}
.tapes .ghost{color:var(--metal-ink);border-color:#6b604f}
.wires{width:100%;height:auto;display:block}
.wires .wlab{font:400 10px "Plex Mono",monospace;fill:#bdb3a2}
.wires .wletter{font:400 10px "Plex Mono",monospace;fill:#d8cfbf}
.wires .pin{fill:#6b604f}
.wires .faint line{stroke:#6b604f;stroke-width:.5;opacity:.55}
.wires .faint line.plugged{stroke:#d8cfbf;opacity:.9;stroke-width:1}
.wires .live{fill:none;stroke-width:2.6;stroke-linejoin:round;stroke-linecap:round}
.wires .go{stroke:#ffc861}
.wires .turn{stroke:#e8e0d0;stroke-dasharray:3 3}
.wires .back{stroke:#8cbcff}
.wires .end.go{fill:#ffc861;stroke:none}
.wires .end.back{fill:#8cbcff;stroke:none}

/* ---- 1941 ---- */
.two{display:grid;grid-template-columns:1fr;gap:1rem}
@media (min-width:760px){.two{grid-template-columns:1fr 1fr}}
pre.ct,pre.pt{margin:0;white-space:pre-wrap;overflow-wrap:anywhere;font:400 .88rem/1.55 "Plex Mono",monospace;min-height:5rem;background:var(--bg-2);border-radius:6px;padding:.7rem}
pre.pt{color:var(--ink)}
.trans{margin-top:1rem;border-left:3px solid var(--accent);padding-left:.9rem}
.trans p{margin:0}

/* ---- the day ---- */
.indicators{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(6.4rem,1fr));gap:.3rem .8rem;font:400 .9rem/1.5 "Plex Mono",monospace;max-height:15rem;overflow:auto;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);padding:.5rem 0}
.cycles{display:flex;flex-direction:column;gap:1rem}
.cyname{margin:0 0 .3rem;font-size:.95rem}
.cyname b{font-family:"Plex Mono",monospace;color:var(--accent);margin-right:.3rem}
.rings{display:flex;flex-wrap:wrap;align-items:center;gap:.3rem .5rem}
.ring{max-width:100%;height:auto}
.ring .rc{fill:none;stroke:var(--rule-2);stroke-width:1.2}
.ring .rn{fill:var(--bg);stroke:var(--accent);stroke-width:1.2}
.ring .rt{font:400 10px "Plex Mono",monospace;fill:var(--ink)}
.same{font-weight:560;border-left:3px solid var(--accent);padding-left:.8rem}

/* ---- catalogue ---- */
progress{flex:1 1 10rem;height:.6rem;accent-color:var(--accent);min-width:6rem}
.cands{display:grid;grid-template-columns:repeat(auto-fill,minmax(9.5rem,1fr));gap:.2rem 1rem;font:400 .88rem/1.6 "Plex Mono",monospace;max-height:14rem;overflow:auto;padding-left:2.2rem}
.cands li.true{color:var(--accent);font-weight:700}
.reveal{border-left:3px solid var(--accent);padding-left:.8rem}

/* ---- sources, footer ---- */
#surse h3{font-size:1.1rem;margin:1.5rem 0 .5rem}
.srcs{padding-left:1.1rem;font-size:.92rem;line-height:1.5}
.srcs li{margin-bottom:.45rem;overflow-wrap:anywhere}
.method{font-size:1rem}
.foot{max-width:42rem;margin:4rem auto 0;padding:2rem 1.25rem 3rem;border-top:1px solid var(--rule);font-size:.92rem;color:var(--ink-2)}
body.nf main{max-width:36rem;margin:20vh auto;padding:0 1.25rem}
[hidden]{display:none!important}