/* ---------------------------------------------------------------------------
 * Autobuild GUI — a black and white page over a minable block field.
 *
 * There is exactly one hue in here: none. Everything is built from black,
 * white, and the greys between them, so emphasis has to come from weight,
 * contrast and borders rather than colour. Panels stay translucent on purpose —
 * the block field behind them is part of the design, and breaking a block has
 * to be visible even underneath the content.
 * ------------------------------------------------------------------------- */

:root{
  color-scheme: dark;

  --void:#000000;
  --sunk:#050505;
  --panel:rgba(255,255,255,.035);
  --panel-2:rgba(255,255,255,.065);
  --line:rgba(255,255,255,.14);
  --line-soft:rgba(255,255,255,.075);
  --text:#F2F2F2;
  --muted:#909090;
  --dim:#6A6A6A;
  --white:#FFFFFF;

  --display:"IBM Plex Sans Condensed","Helvetica Neue",Arial,sans-serif;
  --body:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --pixel:"Pixelify Sans",ui-monospace,SFMono-Regular,Menlo,monospace;

  --wrap:1140px;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;background:var(--void)}
body{
  margin:0;
  background:var(--void);
  color:var(--text);
  font-family:var(--body);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%}
a{color:var(--white);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
:focus-visible{outline:2px solid var(--white);outline-offset:2px}

h1,h2,h3{font-family:var(--display);font-weight:700;line-height:1.08;text-wrap:balance;margin:0;letter-spacing:-.01em;color:var(--white)}
h1{font-size:clamp(2.6rem,7vw,4.4rem)}
h2{font-size:clamp(1.75rem,3.6vw,2.5rem)}
h3{font-size:1.05rem;font-weight:600;letter-spacing:0}
p{margin:0}

.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:24px}

/* ---------------- The block field ----------------
 * A fixed canvas at the very back. It never takes pointer events itself — the
 * script reads clicks off the window, so a click anywhere that is not a control
 * mines the block behind it. */
#blockfield{
  position:fixed;inset:0;
  z-index:0;
  pointer-events:none;
  display:block;
}
/* Everything else floats above the field. The header and the skip link bring
 * their own stacking already. */
main,footer{position:relative;z-index:1}

/* The mined counter, bottom right, deliberately quiet. */
.hud{
  position:fixed;right:16px;bottom:14px;z-index:5;
  display:flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--dim);
  background:rgba(0,0,0,.72);
  border:1px solid var(--line-soft);
  padding:6px 11px;
  pointer-events:none;
  backdrop-filter:blur(6px);
}
.hud b{color:var(--white);font-weight:500;font-variant-numeric:tabular-nums}
@media (max-width:620px){.hud{display:none}}

.eyebrow{
  font-family:var(--mono);font-size:.72rem;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;color:var(--muted);
  display:flex;align-items:center;gap:10px;margin-bottom:18px;
}
.eyebrow::after{content:"";flex:1;height:1px;background:var(--line-soft)}

/* ---------------- Header ---------------- */
.topbar{
  position:sticky;top:0;z-index:40;
  background:rgba(0,0,0,.82);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-soft);
}
.topbar .wrap{display:flex;align-items:center;gap:24px;height:62px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--display);font-weight:700;font-size:1.05rem;color:var(--white);letter-spacing:.01em}
.topbar .brand{margin-right:auto}
.brand:hover{text-decoration:none}
.brand .mark{width:28px;height:28px;flex:none;display:block}
.topnav{display:flex;gap:22px;font-family:var(--mono);font-size:.8rem}
.topnav a{color:var(--muted)}
.topnav a:hover{color:var(--white);text-decoration:none}
@media (max-width:860px){.topnav{display:none}}

/* ---------------- Buttons ---------------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:.85rem;font-weight:500;
  padding:11px 18px;border:1px solid var(--line);
  background:rgba(0,0,0,.55);color:var(--text);
  transition:border-color .15s ease,background .15s ease,color .15s ease,transform .15s ease;
}
.btn:hover{text-decoration:none;border-color:var(--white);background:var(--panel-2);color:var(--white)}
.btn:active{transform:translateY(1px)}
.btn-primary{
  background:var(--white);border-color:var(--white);color:#000;font-weight:600;
}
.btn-primary:hover{background:#D8D8D8;border-color:#D8D8D8;color:#000}

/* ---------------- Hero ---------------- */
.hero{padding:clamp(48px,8vw,96px) 0 clamp(56px,7vw,88px);border-bottom:1px solid var(--line-soft)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.02fr);gap:clamp(32px,5vw,64px);align-items:center}
@media (max-width:940px){.hero-grid{grid-template-columns:minmax(0,1fr)}}
.tagline{
  font-family:var(--mono);font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);margin-bottom:20px;
}
.hero h1{margin-bottom:20px}
.hero h1 .thin{display:block;font-weight:600;color:var(--muted);font-size:.34em;letter-spacing:.02em;margin-top:14px;line-height:1.4;max-width:34ch}
.lede{font-size:1.1rem;color:var(--muted);max-width:52ch;margin-bottom:28px}
.lede strong{color:var(--white);font-weight:500}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.specs{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  font-family:var(--mono);font-size:.72rem;color:var(--muted);
  border:1px solid var(--line-soft);padding:5px 10px;background:rgba(0,0,0,.5);
}
.chip b{color:var(--white);font-weight:500}

/* The one line that tells people the background is a toy. */
.hint{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--mono);font-size:.72rem;letter-spacing:.06em;
  color:var(--muted);margin-top:22px;
}
.hint .pick{width:13px;height:13px;flex:none;border:1px solid var(--muted);position:relative}
.hint .pick::after{content:"";position:absolute;inset:3px;background:var(--muted)}

/* ---------------- The menu recreation ---------------- */
.screen{
  border:1px solid var(--line);
  font-variant-ligatures:none;font-feature-settings:"liga" 0,"clig" 0;
  background:rgba(0,0,0,.78);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  padding:16px;position:relative;
  box-shadow:0 24px 60px -30px #000;
}
.screen::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(120% 90% at 50% 0%,rgba(255,255,255,.05),transparent 60%);
}
.screen-title{
  font-family:var(--pixel);font-size:1.15rem;font-weight:700;text-align:center;
  color:var(--white);text-shadow:2px 2px 0 #333;margin:6px 0 14px;
}
.mc-input{
  border:1px solid var(--line);background:rgba(0,0,0,.65);
  padding:8px 9px;margin-bottom:8px;
  font-family:var(--pixel);font-size:.95rem;color:#6E6E6E;
  display:flex;align-items:center;gap:2px;
}
.mc-input .caret{width:1px;height:.9em;background:#fff;margin-right:4px;animation:blink 1.06s steps(1,end) infinite}
@keyframes blink{0%,49%{opacity:1}50%,100%{opacity:0}}

.rows{display:flex;flex-direction:column;gap:2px}
.row{
  display:flex;align-items:center;gap:9px;
  padding:7px 9px;border:1px solid transparent;background:rgba(255,255,255,.025);
}
.row.hover{background:rgba(255,255,255,.09);border-color:var(--line)}
.row.blocked{opacity:.5}
/* The block icon on a row: a cube face, three greys deep. */
.row .icon{width:24px;height:24px;flex:none;background:#8B8B8B;position:relative}
.row .icon::after{content:"";position:absolute;inset:1px;background:#3F3F3F}
.row .icon i{position:absolute;inset:5px;z-index:1;display:block;background:currentColor;opacity:.9}
.row .meta{min-width:0;flex:1;display:flex;flex-direction:column}
.row .name{font-family:var(--pixel);font-size:.98rem;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;text-shadow:1px 1px 0 rgba(0,0,0,.6)}
.row .sub{font-family:var(--pixel);font-size:.84rem;color:#9A9A9A;margin-top:5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.row .status{font-family:var(--pixel);font-size:.86rem;color:#9A9A9A;flex:none;align-self:flex-start;margin-top:1px}
/* No red left to warn with, so a locked row is struck through instead. */
.row .status.miss{color:#fff;text-decoration:line-through;text-decoration-thickness:1px}
.running{display:flex;align-items:center;gap:6px;flex:none}
.bar{width:78px;height:9px;border:1px solid #8B8B8B;background:#111;overflow:hidden;position:relative}
.bar span{position:absolute;top:0;bottom:0;width:35%;background:#fff;animation:sweep 1.4s linear infinite}
@keyframes sweep{from{left:-35%}to{left:100%}}
.x{width:13px;height:13px;position:relative;flex:none}
.x::before,.x::after{content:"";position:absolute;left:0;top:6px;width:13px;height:1.6px;background:#fff}
.x::before{transform:rotate(45deg)}
.x::after{transform:rotate(-45deg)}
.screen-foot{
  display:flex;justify-content:space-between;gap:12px;
  font-family:var(--mono);font-size:.68rem;color:var(--dim);
  margin-top:14px;padding-top:10px;border-top:1px solid var(--line-soft);
}
kbd{
  font-family:var(--mono);font-size:.72rem;color:var(--white);
  border:1px solid var(--line);border-bottom-width:2px;background:rgba(255,255,255,.06);
  padding:1px 6px;
}
@media (prefers-reduced-motion:reduce){
  .bar span{animation:none;left:32%}
  .mc-input .caret{animation:none}
}

/* ---------------- Sections ---------------- */
section{padding:clamp(56px,8vw,96px) 0;border-bottom:1px solid var(--line-soft)}
.sec-head{max-width:62ch;margin-bottom:44px}
.sec-head p{color:var(--muted);margin-top:14px;font-size:1.03rem}

.features{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line-soft);border:1px solid var(--line-soft)}
@media (max-width:900px){.features{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:600px){.features{grid-template-columns:minmax(0,1fr)}}
.feature{
  background:rgba(0,0,0,.62);
  backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px);
  padding:26px 24px 28px;display:flex;flex-direction:column;gap:10px;
  transition:background .18s ease;
}
.feature:hover{background:rgba(255,255,255,.045)}
.feature .tag{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--white)}
.feature p{color:var(--muted);font-size:.95rem}
.feature p em{font-style:normal;color:var(--white)}

/* Pipeline */
.pipe{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:14px;align-items:stretch;margin-bottom:36px}
@media (max-width:820px){.pipe{grid-template-columns:minmax(0,1fr);gap:10px}.pipe .arrow{transform:rotate(90deg);justify-self:start;margin-left:24px}}
.step{border:1px solid var(--line-soft);background:rgba(0,0,0,.62);backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px);padding:20px}
.step .who{font-family:var(--mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
/* The middle step is this project — marked by a white border, not a colour. */
.step.self{border-color:var(--white);box-shadow:inset 0 0 0 1px rgba(255,255,255,.14)}
.step.self .who{color:var(--white)}
.step b{font-family:var(--display);font-size:1.15rem;font-weight:700;display:block;margin-bottom:6px;color:var(--white)}
.step p{color:var(--muted);font-size:.92rem}
.arrow{display:flex;align-items:center;color:var(--dim);font-family:var(--mono);font-size:1.1rem}

.anatomy{display:flex;flex-direction:column;gap:clamp(24px,4vw,40px)}
.legend{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:clamp(24px,4vw,48px);border-bottom:1px solid var(--line-soft)}
@media (max-width:760px){.legend{grid-template-columns:minmax(0,1fr)}}
.legend li{display:flex;gap:16px;padding:16px 0;border-top:1px solid var(--line-soft);align-items:center}
.legend .swatch{width:34px;flex:none;display:flex;align-items:center;justify-content:center;padding-top:3px}
.legend p{color:var(--muted);font-size:.92rem}
.sw-icon{width:20px;height:20px;background:#8B8B8B;position:relative}
.sw-icon::after{content:"";position:absolute;inset:1px;background:#3F3F3F}
.sw-bar{width:30px;height:9px;border:1px solid #8B8B8B;background:#111;position:relative;overflow:hidden}
.sw-bar::after{content:"";position:absolute;inset:1px;right:60%;background:#fff}
.sw-text{font-family:var(--pixel);font-variant-ligatures:none;font-size:.78rem;color:#fff;text-align:center;line-height:1.3;text-decoration:line-through;text-decoration-thickness:1px}
.sw-cursor{width:14px;height:18px;fill:#fff}

/* Table */
.table-scroll{overflow-x:auto;border:1px solid var(--line-soft);background:rgba(0,0,0,.62);backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px)}
table{border-collapse:collapse;width:100%;min-width:520px;font-size:.94rem}
th,td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line-soft)}
thead th{font-family:var(--mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);background:rgba(255,255,255,.05)}
tbody tr:last-child td{border-bottom:none}
tbody tr:nth-child(odd){background:rgba(255,255,255,.02)}
td.v{font-family:var(--mono);font-size:.85rem;color:var(--muted);white-space:nowrap}
td .req{font-family:var(--mono);font-size:.75rem;color:var(--white)}
td .opt{font-family:var(--mono);font-size:.75rem;color:var(--dim)}

/* Warning — a white rule and a hatched edge instead of a red box. */
.warn{
  border:1px solid var(--white);
  background:rgba(255,255,255,.05);
  padding:22px 24px;margin:32px 0;position:relative;
  backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px);
}
.warn::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:6px;
  background:repeating-linear-gradient(135deg,#fff 0 4px,transparent 4px 9px);
}
.warn .lbl{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--white);margin-bottom:10px}
.warn h3{margin-bottom:8px}
.warn p{color:var(--muted);font-size:.95rem;max-width:70ch}
.warn p + p{margin-top:10px}
.warn code,.warn strong{color:var(--white)}
code{font-family:var(--mono);font-size:.88em;background:rgba(255,255,255,.07);border:1px solid var(--line-soft);padding:1px 5px}

/* Steps */
.steps{counter-reset:s;list-style:none;margin:32px 0 0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line-soft);border:1px solid var(--line-soft)}
@media (max-width:700px){.steps{grid-template-columns:minmax(0,1fr)}}
.steps li{counter-increment:s;background:rgba(0,0,0,.62);backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px);padding:22px 24px}
.steps li::before{content:counter(s,decimal-leading-zero);font-family:var(--mono);font-size:.75rem;color:var(--white);display:block;margin-bottom:8px;letter-spacing:.1em}
.steps li p{color:var(--muted);font-size:.94rem;margin-top:6px}
.steps li b{font-family:var(--display);font-size:1.05rem;color:var(--white)}

.notes{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
@media (max-width:820px){.notes{grid-template-columns:minmax(0,1fr);gap:20px}}
.notes li{border-left:2px solid var(--line);padding-left:18px}
.notes h3{margin-bottom:6px}
.notes p{color:var(--muted);font-size:.93rem}

/* Download */
.download{
  background:rgba(0,0,0,.62);backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px);
  border:1px solid var(--line-soft);padding:clamp(28px,4vw,44px);
  display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:clamp(24px,4vw,48px);align-items:center;
}
@media (max-width:820px){.download{grid-template-columns:minmax(0,1fr)}}
.download h2{margin-bottom:14px}
.download > div > p{color:var(--muted);max-width:50ch}
.file{border:1px solid var(--line-soft);background:rgba(255,255,255,.035);padding:20px}
.file .fname{font-family:var(--mono);font-size:.92rem;color:var(--white);word-break:break-all;margin-bottom:14px}
.file dl{margin:0 0 18px;display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-family:var(--mono);font-size:.76rem}
.file dt{color:var(--muted)}
.file dd{margin:0;color:var(--white);text-align:right}
.file .hash{font-family:var(--mono);font-size:.66rem;color:var(--muted);word-break:break-all;line-height:1.5;border-top:1px solid var(--line-soft);padding-top:12px;margin-top:14px}

/* Terms of use */
.terms{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line-soft);border:1px solid var(--line-soft)}
@media (max-width:760px){.terms{grid-template-columns:minmax(0,1fr)}}
.terms > div{background:rgba(0,0,0,.62);backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px);padding:24px}
.terms h3{margin-bottom:8px}
.terms p{color:var(--muted);font-size:.92rem}
.terms p + p{margin-top:8px}
.stamp{font-family:var(--mono);font-size:.74rem;color:var(--dim);margin-top:18px}

/* Footer */
footer{position:relative;z-index:1;padding:clamp(48px,6vw,72px) 0 32px;background:rgba(0,0,0,.7);backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px)}
.fgrid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:32px}
@media (max-width:860px){.fgrid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.fgrid{grid-template-columns:minmax(0,1fr)}}
.fgrid h4{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:0 0 16px;font-weight:500}
.fgrid ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;font-size:.92rem}
.fgrid ul a{color:var(--muted)}
.fgrid ul a:hover{color:var(--white)}
.fabout p{color:var(--muted);font-size:.92rem;max-width:34ch;margin-top:14px}
.fbottom{margin-top:44px;padding-top:22px;border-top:1px solid var(--line-soft);display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;font-family:var(--mono);font-size:.74rem;color:var(--dim)}
.fbottom a{color:var(--muted)}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:12px;z-index:60;background:var(--white);color:#000;padding:8px 14px}