/* ATDT :: shared site styles
   Palette is the VGA 16, toned for screens. Terminal chrome uses a system
   monospace stack so box-drawing and block glyphs never depend on a webfont. */

:root{
  --void:#07070c;
  --panel:#0e0e17;
  --edge:#22222f;
  --hair:#14141f;
  --gray:#9a9aa8;
  --dim:#6a6a7a;
  --white:#f1f1f6;
  --cyan:#3fdfe8;
  --magenta:#e558c6;
  --amber:#ffc94a;
  --red:#ff5a5a;
  --green:#4ade6a;
  --mono:ui-monospace,"Cascadia Mono","SF Mono",Menlo,Consolas,"DejaVu Sans Mono",monospace;
  --body:"Archivo",system-ui,-apple-system,"Segoe UI",sans-serif;
  --wrap:1080px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--void);color:var(--gray);
  font-family:var(--body);font-size:17px;line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
h1,h2,h3,h4{color:var(--white);font-weight:900;letter-spacing:-.02em;line-height:1.15;margin:0}
p{margin:0}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px}
hr.rule{border:0;border-top:1px solid var(--edge);margin:0}

/* ── status bar ─────────────────────────────── */
.status{
  position:sticky;top:0;z-index:50;background:rgba(7,7,12,.93);
  border-bottom:1px solid var(--edge);backdrop-filter:blur(6px);
}
.status .wrap{display:flex;align-items:center;gap:18px;height:42px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase}
.status .mark{color:var(--white);font-weight:700;letter-spacing:.3em}
.status .mark:hover{text-decoration:none;color:var(--cyan)}
.status .sp{flex:1}
.status .led{color:var(--amber)}
.status .led::before{content:"\25CF";color:var(--green);margin-right:7px;
  animation:atdt-pulse 2.6s steps(1,end) infinite}
.status nav a{color:var(--dim);margin-left:20px}
.status nav a:hover{color:var(--white);text-decoration:none}
.status nav a[aria-current]{color:var(--white)}
@keyframes atdt-pulse{0%,60%{opacity:1}61%,100%{opacity:.25}}
@media(max-width:700px){.status .led,.status .tuck{display:none}}

/* ── shared type devices ────────────────────── */
.eyebrow{font-family:var(--mono);font-size:11.5px;letter-spacing:.24em;
  text-transform:uppercase;color:var(--magenta);margin-bottom:14px}
.lede{max-width:62ch}
code{font-family:var(--mono);font-size:.88em;color:var(--amber);word-break:break-word}
kbd{font-family:var(--mono);font-size:.85em;border:1px solid var(--edge);
  background:var(--panel);color:var(--white);padding:1px 6px;white-space:nowrap}

/* preformatted spec / code block */
.spec{font-family:var(--mono);font-size:13.5px;line-height:1.95;color:var(--gray);
  background:var(--panel);border:1px solid var(--edge);padding:22px 24px;
  overflow-x:auto;white-space:pre;margin:0}
.spec b{color:var(--white);font-weight:400}
.spec .c{color:var(--dim)}
.spec .k{color:var(--cyan)}
.spec .s{color:var(--amber)}

/* buttons */
.btn-row{display:flex;flex-wrap:wrap;gap:14px;align-items:stretch}
.btn-row .btn{margin:0}
.btn{display:inline-block;font-family:var(--mono);font-size:14px;letter-spacing:.06em;
  background:var(--cyan);color:#000;padding:15px 30px;border:1px solid var(--cyan);font-weight:700}
.btn:hover{background:var(--amber);border-color:var(--amber);text-decoration:none}
.btn.ghost{background:transparent;color:var(--white);border-color:var(--edge);font-weight:400}
.btn.ghost:hover{background:transparent;border-color:var(--cyan);color:var(--cyan)}

/* ── footer ─────────────────────────────────── */
footer{border-top:1px solid var(--edge);padding:48px 0 60px;
  font-family:var(--mono);font-size:12.5px;color:var(--dim);letter-spacing:.04em}
.fcols{display:flex;flex-wrap:wrap;gap:36px 56px;margin-bottom:34px}
.fcols div{min-width:130px}
.fcols strong{display:block;color:var(--white);font-weight:400;letter-spacing:.18em;
  text-transform:uppercase;font-size:11px;margin-bottom:12px}
.fcols a{display:block;color:var(--dim);padding:3px 0}
.fcols a:hover{color:var(--cyan);text-decoration:none}
.sig{color:var(--dim)}
.sig span{color:var(--magenta)}

@media(prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
}

/* the status LED doubles as a link to the live board */
.status a.led{color:var(--amber)}
.status a.led:hover{color:var(--white);text-decoration:none}

/* simple prose pages: license, changelog, 404 */
.page{padding-top:56px;padding-bottom:90px;max-width:74ch}
.page h1{font-size:clamp(28px,4.4vw,42px);margin-bottom:16px}
.page h2{font-size:19px;margin:50px 0 18px}
.page p{margin:0 0 22px}
.page ul{list-style:none;margin:0 0 20px;padding:0}
.page li{padding:9px 0 9px 24px;position:relative;line-height:1.6}
.page li::before{content:"\25B8";position:absolute;left:0;top:9px;color:var(--cyan);
  font-family:var(--mono);font-size:13px}
.release{border-top:1px solid var(--edge);padding:38px 0 8px}
.release .tag{font-family:var(--mono);font-size:12px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--dim);display:block;margin-bottom:10px}
.release h2{margin-top:0}
.center-404{min-height:64vh;display:flex;flex-direction:column;
  align-items:center;justify-content:center;text-align:center;padding:60px 0}
.center-404 pre{font-family:var(--mono);color:var(--red);font-size:clamp(11px,3.4vw,20px);
  line-height:1.1;margin:0 0 28px;white-space:pre}

/* ── feature list ────────────────────────────────────────
   The lead block is the configurability story, given its own
   full-width slab because it is the thing that sells the board. */
.feat-lead{border:1px solid var(--edge);background:var(--panel);
  padding:38px 38px 40px;margin-bottom:1px}
.feat-lead h3{font-size:21px;margin:0 0 16px}
.feat-lead > p{max-width:64ch;margin:0 0 30px}
.feat-lead .cols{display:grid;gap:16px 52px}
@media(min-width:760px){.feat-lead .cols{grid-template-columns:1fr 1fr}}

.feat{display:grid;gap:1px;background:var(--edge);border:1px solid var(--edge)}
@media(min-width:720px){.feat{grid-template-columns:1fr 1fr}}
@media(min-width:1000px){.feat{grid-template-columns:repeat(3,1fr)}}
.feat .item{background:var(--void);padding:32px 30px 34px}
.feat .item h3{font-size:17px;margin:0 0 16px}
.feat .item .kicker{font-family:var(--mono);font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--magenta);display:block;margin-bottom:14px}

ul.pts{list-style:none;margin:0;padding:0}
ul.pts li{padding:9px 0 9px 24px;position:relative;font-size:15px;line-height:1.62}
ul.pts li::before{content:"\25B8";position:absolute;left:0;top:9px;color:var(--cyan);
  font-family:var(--mono);font-size:12px}
ul.pts li b{color:var(--white);font-weight:500}
ul.pts.amber li::before{color:var(--amber)}

/* ── download ────────────────────────────────────────────
   Facts live in a mono panel so version, date and requirements
   read as a spec sheet rather than marketing copy. */
.grab{display:grid;gap:44px;align-items:start}
@media(min-width:900px){.grab{grid-template-columns:1.25fr 1fr;gap:56px}}
.facts{border:1px solid var(--edge);background:var(--panel);padding:0}
.facts .row{display:flex;gap:18px;padding:16px 24px;border-bottom:1px solid var(--edge);
  font-family:var(--mono);font-size:13.5px;line-height:1.5}
.facts .row:last-child{border-bottom:0}
.facts .row b{color:var(--dim);font-weight:400;width:10em;flex:none;letter-spacing:.06em}
.facts .row span{color:var(--white)}
.facts .row span.hi{color:var(--amber)}

/* ── door library ────────────────────────────────────────
   Each door is a two-column row: a left rail carrying the name,
   status and download, and a description beside it. A single wide
   column of short prose left a dead pocket of whitespace on the
   right; splitting it gives the width a job. Amber marks anything
   not downloadable yet, the same as elsewhere. */
.doors-list{display:grid;gap:1px;background:var(--edge);border:1px solid var(--edge);
  max-width:920px}
.door{background:var(--void);padding:32px 34px 34px;display:grid;gap:14px 40px}
@media(min-width:760px){
  .door{grid-template-columns:215px minmax(0,1fr);align-items:start}
}
.door .rail{min-width:0}
.door h3{font-size:20px;margin:0 0 12px;line-height:1.2}
.door .badge{font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;
  text-transform:uppercase;padding:3px 9px;border:1px solid var(--edge);color:var(--dim);
  display:inline-block}
.door .badge.soon{color:var(--amber);border-color:rgba(255,201,74,.45)}
.door .by{font-family:var(--mono);font-size:12.5px;color:var(--dim);
  letter-spacing:.06em;margin:14px 0 0}
.door .by span{color:var(--gray)}
.door .body{min-width:0}
.door p.desc{font-size:15.5px;line-height:1.68;margin:0}
.door p.live{font-size:14.5px;line-height:1.6;margin:16px 0 0;color:var(--amber)}
.door p.live b{color:var(--amber);font-weight:700}
.door .get{font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;
  border:1px solid var(--edge);padding:11px 16px;color:var(--gray);
  background:var(--panel);display:inline-block;margin-top:22px;text-align:center}
.door .get:hover{color:#000;background:var(--cyan);border-color:var(--cyan);text-decoration:none}
.door .get.off{color:var(--dim);background:transparent}
.door .get.off:hover{color:var(--dim);background:transparent;border-color:var(--edge);cursor:default}

.panels{display:grid;gap:40px;margin-top:68px}
@media(min-width:860px){.panels{grid-template-columns:1fr 1fr;gap:52px}}
.panel{border:1px solid var(--edge);background:var(--panel);padding:32px 32px 34px}
.panel h3{font-size:17px;margin:0 0 16px}
.panel p{font-size:15px;line-height:1.65;margin:0 0 18px}
.panel p:last-child{margin-bottom:0}
.panel .mail{font-family:var(--mono);font-size:14px;color:var(--amber);word-break:break-all}

/* ── about ───────────────────────────────────────────────*/
.about{display:grid;gap:56px;align-items:start}
@media(min-width:900px){.about{grid-template-columns:1fr 320px;gap:72px}}
.about .prose p{font-size:17.5px;line-height:1.78;margin:0 0 30px}
.about .prose p:last-child{margin-bottom:0}
.about .prose .sign{font-family:var(--mono);font-size:14px;color:var(--cyan);
  letter-spacing:.08em;margin-top:38px}

/* small secondary link under a door's download button */
.door .more{display:block;font-family:var(--mono);font-size:12px;letter-spacing:.06em;
  color:var(--dim);margin-top:14px}
.door .more:hover{color:var(--cyan);text-decoration:none}

/* ── door changelog page ─────────────────────────────────
   Narrower than the board changelog: a door's notes are read
   start to finish, not scanned for a version. */
.doc-head{padding:56px 0 0}
.doc-head h1{font-size:clamp(28px,4.4vw,42px);margin-bottom:14px}
.doc-head .tagline{font-family:var(--mono);font-size:13px;color:var(--dim);
  letter-spacing:.04em;margin-top:20px}
.notes{max-width:74ch;padding:0 0 90px}
.notes .band-note{border-top:1px solid var(--edge);padding:38px 0 4px}
.notes h2{font-size:20px;margin:0 0 16px}
.notes h3{font-size:15px;font-family:var(--mono);font-weight:400;letter-spacing:.14em;
  text-transform:uppercase;color:var(--white);margin:30px 0 14px}
.notes p{margin:0 0 20px;line-height:1.68}
.notes ul{list-style:none;margin:0 0 22px;padding:0}
.notes li{padding:9px 0 9px 24px;position:relative;line-height:1.62}
.notes li::before{content:"\25B8";position:absolute;left:0;top:9px;color:var(--cyan);
  font-family:var(--mono);font-size:12px}
.notes li b{color:var(--white);font-weight:500}

/* ── roadmap ─────────────────────────────────────────────
   A trunk line running down the page with each release hung
   off it as a stop. Amber marks work in testing, dim marks
   work not started; nothing here carries a date on purpose. */
.now{border:1px solid var(--edge);background:var(--panel);padding:28px 32px 30px;
  max-width:900px;margin-bottom:64px}
.now h2{font-size:18px;margin:0 0 14px}
.now p{font-size:15.5px;line-height:1.65;margin:0 0 14px;max-width:66ch}
.now p:last-child{margin-bottom:0}

.road{position:relative;max-width:900px;padding-left:0}
@media(min-width:720px){
  .road{padding-left:132px}
  .road::before{content:"";position:absolute;left:47px;top:10px;bottom:60px;width:1px;
    background:linear-gradient(180deg,var(--cyan) 0%,var(--edge) 22%,var(--edge) 100%)}
}
.stop{position:relative;padding:0 0 52px}
.stop:last-child{padding-bottom:0}
.stop .ver{font-family:var(--mono);font-size:15px;letter-spacing:.1em;color:var(--white);
  display:block;margin-bottom:6px}
.stop .state{font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--dim);display:block}
@media(min-width:720px){
  .stop .marker{position:absolute;left:-132px;top:2px;width:96px;text-align:right}
  .stop .marker::after{content:"";position:absolute;right:-90px;top:7px;width:9px;height:9px;
    background:var(--void);border:1px solid var(--edge);border-radius:50%}
  .stop.testing .marker::after{border-color:var(--amber);background:var(--amber)}
  .stop .ver{margin-bottom:5px}
}
@media(max-width:719px){
  .stop .marker{display:flex;align-items:baseline;gap:12px;margin-bottom:16px;
    padding-bottom:12px;border-bottom:1px solid var(--edge)}
  .stop .marker .ver{margin:0}
}
.stop.testing .state{color:var(--amber)}
.stop .feat-row{padding:22px 0 0;border-top:1px solid var(--hair)}
.stop .feat-row:first-of-type{border-top:0;padding-top:0}
.stop h3{font-size:19px;margin:0 0 10px}
.stop p{font-size:15.5px;line-height:1.68;margin:0 0 22px;max-width:64ch}
.stop .feat-row:last-child p{margin-bottom:0}

/* version-number anatomy */
.anat{display:grid;gap:1px;background:var(--edge);border:1px solid var(--edge);
  max-width:900px;margin-top:22px}
@media(min-width:760px){.anat{grid-template-columns:repeat(3,1fr)}}
.anat .slot{background:var(--void);padding:24px 26px 26px}
.anat .slot .pat{font-family:var(--mono);font-size:20px;letter-spacing:.12em;color:var(--dim);
  display:block;margin-bottom:14px}
.anat .slot .pat b{color:var(--cyan);font-weight:400}
.anat .slot p{font-size:15px;line-height:1.6;margin:0}

/* list of supported legacy systems on the roadmap */
.sysgrid{display:grid;gap:1px;background:var(--edge);border:1px solid var(--edge);
  margin:22px 0 20px;max-width:640px;
  grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
.sysgrid span{background:var(--void);padding:11px 14px;font-family:var(--mono);
  font-size:12.5px;letter-spacing:.04em;color:var(--gray)}

/* compact reference table inside a door's release notes */
.notes table{width:100%;border-collapse:collapse;margin:0 0 24px;font-size:15px}
.notes table th{text-align:left;font-family:var(--mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--dim);font-weight:400;
  padding:0 16px 9px 0;border-bottom:1px solid var(--edge)}
.notes table td{padding:11px 16px 11px 0;border-bottom:1px solid var(--hair);
  vertical-align:top;line-height:1.55}
.notes table td:first-child{color:var(--white);white-space:nowrap;padding-right:24px}
.notes table tr:last-child td{border-bottom:1px solid var(--edge)}

/* ── newsletter signup ───────────────────────────────────
   Buttondown's embed form, restyled with the site's own
   tokens. Plain POST, no JavaScript, no iframe: it degrades
   to a normal form submit if anything fails. */
.signup{border:1px solid var(--edge);background:var(--panel);
  padding:30px 32px 32px;max-width:640px;margin:56px 0 0}
.signup h3{font-size:18px;margin:0 0 10px}
.signup p.why{font-size:15px;line-height:1.6;color:var(--gray);margin:0 0 22px;max-width:56ch}
.signup form{margin:0}
.signup label{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--dim);margin:0 0 9px}
.signup .fields{display:flex;flex-wrap:wrap;gap:12px}
.signup input[type="email"]{flex:1 1 240px;min-width:0;
  background:var(--void);border:1px solid var(--edge);color:var(--white);
  font-family:var(--mono);font-size:14px;padding:14px 15px;border-radius:0}
.signup input[type="email"]:focus{outline:2px solid var(--amber);outline-offset:2px;
  border-color:var(--cyan)}
.signup input[type="email"]::placeholder{color:var(--dim)}
.signup input[type="submit"]{flex:0 0 auto;
  background:var(--cyan);color:#000;border:1px solid var(--cyan);
  font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:.1em;
  text-transform:uppercase;padding:14px 30px;border-radius:0;cursor:pointer}
.signup input[type="submit"]:hover{background:var(--amber);border-color:var(--amber)}
.signup p.fine{font-family:var(--mono);font-size:11.5px;letter-spacing:.04em;
  color:var(--dim);margin:18px 0 0;line-height:1.6}
.signup p.fine a{color:var(--dim)}
.signup p.fine a:hover{color:var(--cyan);text-decoration:none}

/* confirmation page */
.confirm{min-height:56vh;display:flex;flex-direction:column;
  align-items:center;justify-content:center;text-align:center;padding:70px 0 90px}
.confirm pre{font-family:var(--mono);color:var(--cyan);font-size:clamp(11px,3.2vw,19px);
  line-height:1.1;margin:0 0 30px;white-space:pre}
.confirm h1{font-size:clamp(25px,4vw,38px);margin:0 0 16px}
.confirm .lede{margin:0 auto 32px}

/* ── license text ────────────────────────────────────────
   Mono, but flowing: the MIT text ships with hard breaks at
   about 85 columns, which double-wrap in a narrower column.
   Each paragraph is one unbroken line here and wraps once. */
.license-text{border:1px solid var(--edge);background:var(--panel);
  padding:30px 34px;margin-top:36px;max-width:none}
.license-text p{font-family:var(--mono);font-size:13.5px;line-height:1.85;
  color:var(--gray);margin:0 0 22px}
.license-text p:first-child{color:var(--white);margin-bottom:26px}
.license-text p:last-child{margin-bottom:0}

/* ── DOS door packages ───────────────────────────────────
   Ready-made drops: name, a line on the door, download.
   Narrower than the ATDT door cards; these are downloads,
   not games with descriptions to browse. */
.pkgs{display:grid;gap:1px;background:var(--edge);border:1px solid var(--edge);
  max-width:920px;margin:0 0 20px}
.pkg{background:var(--void);padding:26px 28px 28px;display:grid;gap:12px 36px}
@media(min-width:720px){.pkg{grid-template-columns:190px minmax(0,1fr) auto;align-items:start}}
.pkg h3{font-size:18px;margin:0;line-height:1.25}
.pkg h3 span{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--dim);font-weight:400;margin-top:7px}
.pkg .body{min-width:0}
.pkg p{font-size:15px;line-height:1.62;margin:0 0 12px;color:var(--gray)}
.pkg p:last-child{margin-bottom:0}
.pkg p.note-sm{font-size:14px;color:var(--dim);line-height:1.6}
.pkg .get{font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;
  border:1px solid var(--edge);padding:11px 18px;color:var(--gray);
  background:var(--panel);display:inline-block;white-space:nowrap}
.pkg .get:hover{color:#000;background:var(--cyan);border-color:var(--cyan);text-decoration:none}

/* a loud, unmissable warning */
.warn{border:1px solid rgba(255,201,74,.45);background:rgba(255,201,74,.05);
  padding:24px 28px;margin:0 0 32px;max-width:920px}
.warn h3{font-size:16px;color:var(--amber);margin:0 0 10px}
.warn p{font-size:15px;line-height:1.65;margin:0 0 12px;color:var(--gray)}
.warn p:last-child{margin-bottom:0}