/* arcade-nodes.com: the ARCADE project's home. A dark arcade cabinet look: pixel headings (Press Start 2P, OFL,
   self-hosted so no visitor is sent to a font CDN), plain system text for reading. */
@font-face { font-family: "Pixel"; src: url(/fonts/PressStart2P-Regular.woff2) format("woff2"), url(/fonts/PressStart2P-Regular.ttf) format("truetype"); font-display: swap; }

:root {
  --bg: #0b0e1a; --bg2: #12162b; --bg3: #1a2040; --line: #2a3260;
  --ink: #e9ecff; --ink2: #a9afd4; --ink3: #7d86b3;
  --cyan: #3ee0ff; --pink: #ff5fd2; --gold: #ffd23f; --green: #5cf29a;
  --radius: 10px; --max: 1120px;
  /* the white papers' diagrams draw with these */
  --cds-chart-axis: #7d86b3; --cds-chart-categorical-1: #3ee0ff; --cds-text-primary: #e9ecff;
  --cds-text-secondary: #a9afd4; --cds-chart-reference-tint: rgba(62, 224, 255, .07); --cds-surface-primary: #12162b;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, sans-serif;
       -webkit-font-smoothing: antialiased; }
a { color: var(--cyan); text-underline-offset: 3px; }
a:hover { color: var(--gold); }
img, svg { max-width: 100%; height: auto; }
pre { background: var(--bg2); border: 1px solid var(--line); border-radius: 8px; padding: 14px; overflow-x: auto; max-width: 100%; font-size: 14px; }
pre code { background: none; padding: 0; }
ol.steps li { min-width: 0; }
ol.steps code { background: var(--bg3); padding: 1px 5px; border-radius: 4px; font-size: .9em; overflow-wrap: anywhere; }
ol.steps pre code { overflow-wrap: normal; }
.skip { position: absolute; left: -999px; } .skip:focus { left: 16px; top: 8px; z-index: 9; background: var(--gold); color: #000; padding: 6px 10px; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* header */
header.site { position: sticky; top: 0; z-index: 5; background: rgba(11, 14, 26, .92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.bar { max-width: var(--max); margin: 0 auto; padding: 12px 20px; display: flex; align-items: center; gap: 24px; }
.logo { text-decoration: none; display: flex; flex-direction: column; gap: 4px; }
.logo-word { font-family: "Pixel", monospace; font-size: 20px; letter-spacing: 2px; color: var(--gold);
             text-shadow: 2px 2px 0 var(--pink); }
.logo-word.small { font-size: 14px; margin: 0 0 12px; }
.logo-sub { font-size: 12px; color: var(--ink3); letter-spacing: .5px; white-space: nowrap; }
nav#nav { margin-left: auto; display: flex; gap: 4px; flex-wrap: wrap; }
nav#nav a { color: var(--ink2); text-decoration: none; padding: 7px 10px; border-radius: 8px; font-size: 15px; white-space: nowrap; }
nav#nav a:hover { color: var(--ink); background: var(--bg3); }
nav#nav a[aria-current] { color: var(--bg); background: var(--cyan); }
.menu { display: none; margin-left: auto; background: var(--bg3); color: var(--ink); border: 1px solid var(--line); border-radius: 8px;
        padding: 8px 12px; font: inherit; font-size: 15px; }
@media (max-width: 1100px) {
  .menu { display: block; }
  nav#nav { display: none; position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; background: var(--bg2);
            border-bottom: 1px solid var(--line); padding: 8px 12px 12px; }
  nav#nav.open { display: flex; }
}

/* type */
h1, h2, h3 { line-height: 1.25; }
h1, .h1 { font-family: "Pixel", monospace; font-weight: 400; font-size: clamp(22px, 4vw, 36px); line-height: 1.4; margin: 0 0 18px; }
h2 { font-family: "Pixel", monospace; font-weight: 400; font-size: clamp(15px, 2.2vw, 20px); line-height: 1.5; margin: 56px 0 18px; color: var(--gold); }
h3 { font-size: 20px; margin: 32px 0 8px; }
.kicker { font-family: "Pixel", monospace; font-size: 11px; color: var(--pink); letter-spacing: 1px; text-transform: uppercase; margin: 0 0 14px; }
.lead { font-size: 20px; color: var(--ink2); max-width: 760px; }
.meta { color: var(--ink3); font-size: 14px; }
p, li { max-width: 760px; }

/* home hero */
.hero { padding: 72px 0 56px; border-bottom: 1px solid var(--line);
        background: radial-gradient(900px 400px at 85% 0%, rgba(255, 95, 210, .13), transparent 70%),
                    radial-gradient(800px 380px at 0% 100%, rgba(62, 224, 255, .12), transparent 70%); }
.hero h1 { font-size: clamp(34px, 7vw, 68px); color: var(--gold); text-shadow: 4px 4px 0 var(--pink); letter-spacing: 3px; }
.acro { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 4px 0 26px; font-size: 18px; color: var(--ink2); }
.acro b { font-family: "Pixel", monospace; color: var(--cyan); font-weight: 400; margin-right: 2px; }
.mission { font-size: clamp(20px, 2.6vw, 26px); max-width: 820px; margin: 0 0 30px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 13px 20px; border-radius: 8px; text-decoration: none; font-weight: 600; border: 2px solid var(--cyan); color: var(--cyan); }
.btn.primary { background: var(--cyan); color: var(--bg); }
.btn:hover { border-color: var(--gold); color: var(--gold); } .btn.primary:hover { background: var(--gold); color: var(--bg); }

/* sections and cards */
.section { padding-top: 8px; padding-bottom: 24px; }   /* top and bottom only: .wrap's side padding stays */
.page-head { padding-top: 56px; padding-bottom: 24px; border-bottom: 1px solid var(--line); margin-bottom: 8px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); margin: 20px 0; }
.grid.six { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.card { background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card h3 { margin: 0 0 8px; font-size: 19px; }
.card p { margin: 0; color: var(--ink2); }
.card .tag { font-family: "Pixel", monospace; font-size: 10px; color: var(--pink); display: block; margin-bottom: 12px; letter-spacing: 1px; }
.card a.more { display: inline-block; margin-top: 12px; }
.card.link { text-decoration: none; color: inherit; transition: border-color .15s, transform .15s; }
.card.link:hover { border-color: var(--cyan); transform: translateY(-2px); }
.pill { display: inline-block; font-size: 12px; padding: 2px 9px; border-radius: 99px; border: 1px solid var(--line); color: var(--ink2); margin: 0 6px 6px 0; }
.pill.live { border-color: var(--green); color: var(--green); } .pill.soon { border-color: var(--gold); color: var(--gold); }
ol.steps { counter-reset: s; list-style: none; padding: 0; }
ol.steps > li { counter-increment: s; position: relative; padding: 0 0 18px 52px; }
ol.steps > li::before { content: counter(s); position: absolute; left: 0; top: -2px; width: 34px; height: 34px; display: grid; place-items: center;
                      font-family: "Pixel", monospace; font-size: 13px; color: var(--bg); background: var(--gold); border-radius: 6px; }
.callout { border-left: 4px solid var(--pink); background: var(--bg2); padding: 14px 18px; border-radius: 0 8px 8px 0; max-width: 760px; }

/* tables */
.table { overflow-x: auto; margin: 18px 0; border: 1px solid var(--line); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--bg3); color: var(--ink); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
td:first-child { color: var(--ink); } td { color: var(--ink2); }

/* diagrams */
figure.diagram { margin: 24px 0; background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; max-width: 860px; }
figure.diagram svg { display: block; width: 100%; height: auto; }
.swipe { display: none; }
figure.diagram figcaption { color: var(--ink3); font-size: 14px; margin-top: 8px; }

/* white papers */
.paper { display: grid; grid-template-columns: 240px 1fr; gap: 40px; align-items: start; padding-bottom: 60px; }
.paper > * { min-width: 0; }   /* a wide code block scrolls inside, the page doesn't */
.toc summary { font-family: "Pixel", monospace; font-size: 11px; color: var(--pink); cursor: pointer; margin: 0 0 10px; list-style: none; }
.toc summary::-webkit-details-marker { display: none; }
.toc { position: sticky; top: 84px; max-height: calc(100vh - 100px); overflow: auto; font-size: 14px; border-right: 1px solid var(--line); padding-right: 16px; }
.toc ul { list-style: none; padding: 0; margin: 0; } .toc li { margin: 0 0 6px; }
.toc a { color: var(--ink2); text-decoration: none; } .toc a:hover { color: var(--cyan); }
.prose h2:first-child { margin-top: 8px; }
.prose code { background: var(--bg3); padding: 1px 5px; border-radius: 4px; font-size: .9em; overflow-wrap: anywhere; }
.prose pre { background: var(--bg2); border: 1px solid var(--line); border-radius: 8px; padding: 14px; overflow-x: auto; }
.prose pre code { background: none; padding: 0; overflow-wrap: normal; }
@media (max-width: 900px) { .paper { grid-template-columns: 1fr; } .toc { position: static; max-height: none; border-right: 0; border-bottom: 1px solid var(--line); padding: 0 0 12px; } }

/* footer */
footer.site { border-top: 1px solid var(--line); margin-top: 64px; padding: 40px 0 24px; background: var(--bg2); color: var(--ink2); font-size: 15px; }
.foot { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 24px; }
.foot a { display: block; color: var(--ink2); text-decoration: none; margin: 0 0 6px; } .foot a:hover { color: var(--cyan); }
.foot-h { font-weight: 600; color: var(--ink); margin: 0 0 10px; }
.fine { font-size: 13px; color: var(--ink3); margin-top: 24px; }
@media (max-width: 700px) { .foot { grid-template-columns: 1fr; } }

/* print: the papers as a clean light document */
@media print {
  :root { --bg: #fff; --bg2: #fff; --bg3: #f1f1f4; --line: #ccc; --ink: #111; --ink2: #333; --ink3: #555; --cyan: #0a58a8;
          --cds-chart-axis: #555; --cds-chart-categorical-1: #0a58a8; --cds-text-primary: #111; --cds-text-secondary: #444;
          --cds-chart-reference-tint: #f3f6fa; --cds-surface-primary: #fff; color-scheme: light; }
  header.site, footer.site, .toc, .menu, .skip, .meta a { display: none !important; }
  .paper { display: block; } body { font-size: 11pt; } h2 { color: #111; break-after: avoid; } figure, tr { break-inside: avoid; }
  a { color: #111; text-decoration: none; }
}

/* the live network panel */
.live { padding-top: 28px; padding-bottom: 8px; }
.live-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.live h2 { margin: 20px 0 6px; color: var(--green); display: flex; align-items: center; gap: 12px; }
.dot { width: 12px; height: 12px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 0 rgba(92, 242, 154, .6); animation: pulse 2s infinite; flex: none; }
.live.stale .dot { background: var(--gold); animation: none; } .live.stale h2 { color: var(--gold); }
@keyframes pulse { 70% { box-shadow: 0 0 0 10px rgba(92, 242, 154, 0); } 100% { box-shadow: 0 0 0 0 rgba(92, 242, 154, 0); } }
@media (prefers-reduced-motion: reduce) { .dot { animation: none; } }
.live-when { color: var(--ink3); font-size: 14px; margin: 0; }
.stats { display: grid; gap: 12px; grid-template-columns: repeat(5, 1fr); margin: 16px 0 10px; }
.stat { background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; min-width: 0; }
.stat.big { grid-column: span 2; grid-row: span 2; border-color: var(--green); background: linear-gradient(160deg, rgba(92, 242, 154, .10), var(--bg2) 60%); }
.stat .n { font-size: clamp(22px, 2.4vw, 28px); font-weight: 800; font-variant-numeric: tabular-nums; color: var(--ink); margin: 0 0 6px; white-space: nowrap; letter-spacing: -.5px; }
.stat.big .n { font-family: "Pixel", monospace; font-weight: 400; letter-spacing: 0; font-size: clamp(44px, 7vw, 72px); color: var(--green); margin: 4px 0 10px; }
.stat .l { margin: 0; color: var(--ink); font-weight: 600; font-size: 15px; }
.stat .sub { margin: 4px 0 0; color: var(--ink3); font-size: 13px; }
.stat .sub.ok { color: var(--green); } .stat .sub.behind { color: var(--gold); }
.spark { width: 100%; height: 48px; margin-top: 14px; display: block; }
.live-note { color: var(--ink3); font-size: 13px; max-width: 760px; }
@media (max-width: 1000px) { .stats { grid-template-columns: repeat(3, 1fr); } .stat.big { grid-column: span 3; grid-row: auto; } }
@media (max-width: 640px) { .stats { grid-template-columns: 1fr 1fr; } .stat.big { grid-column: span 2; } .stat { padding: 14px; } .stat .n { font-size: 22px; } }

/* network stats */
.bars { display: grid; gap: 8px; max-width: 760px; margin: 12px 0; }
.bar { width: 100%; display: grid; grid-template-columns: 150px 1fr 80px; gap: 12px; align-items: center; font-size: 15px; }
.bar .track { display: block; background: var(--bg3); border-radius: 6px; height: 14px; overflow: hidden; }
.bar .fill { display: block; background: var(--cyan); height: 100%; border-radius: 6px; min-width: 2px; width: 0; }
.bar .v { text-align: right; font-variant-numeric: tabular-nums; color: var(--ink2); }
.ok-text { color: var(--green); } .muted { color: var(--ink3); }

#n-activity { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1000px) { #n-activity { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) { #n-activity { grid-template-columns: 1fr 1fr; } }

/* FAQ */
.faq details { background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); margin: 0 0 10px; max-width: 820px; }
.faq summary { cursor: pointer; padding: 14px 18px; font-weight: 600; list-style: none; position: relative; padding-right: 44px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 18px; top: 10px; font-family: "Pixel", monospace; color: var(--cyan); }
.faq details[open] summary::after { content: "-"; }
.faq details p { margin: 0; padding: 0 18px 16px; color: var(--ink2); }

/* thanks */
.card.dev h3 { font-family: "Pixel", monospace; font-weight: 400; font-size: 15px; color: var(--gold); margin: 4px 0 10px; overflow-wrap: anywhere; }
.addr { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin: 14px 0 0 !important; }
.addr span { font-size: 12px; color: var(--ink3); text-transform: uppercase; letter-spacing: .5px; width: 100%; }
.addr code { font-size: 12.5px; background: var(--bg3); padding: 4px 6px; border-radius: 4px; overflow-wrap: anywhere; color: var(--ink); flex: 1 1 200px; }
.copy { background: var(--bg3); color: var(--cyan); border: 1px solid var(--line); border-radius: 6px; padding: 4px 10px; font: inherit; font-size: 13px; cursor: pointer; }
.copy:hover { border-color: var(--cyan); }
.tip { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin: 14px 0 0 !important; }
.tip .btn { padding: 9px 14px; font-size: 15px; }
.tip a:not(.btn) { font-size: 14px; }

/* phones */
@media (max-width: 640px) {
  body { font-size: 16px; }
  .hero { padding: 44px 0 36px; }
  .lead { font-size: 18px; }
  h2 { margin-top: 40px; }
  .cta .btn { flex: 1 1 100%; text-align: center; }
  .page-head { padding-top: 36px; }
  /* diagrams keep a readable size and scroll sideways */
  figure.diagram { overflow-x: auto; padding: 10px; }
  figure.diagram svg { min-width: 640px; }
  .swipe { display: block; color: var(--ink3); font-size: 13px; margin: 6px 0 0; }
  /* tables become one card per row, each value under its column's name */
  .table { border: 0; overflow: visible; }
  .table table, .table thead, .table tbody, .table tr, .table td { display: block; width: 100%; }
  .table thead { position: absolute; left: -9999px; }
  .table tr { background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); margin: 0 0 12px; padding: 6px 0; }
  .table td { border: 0; padding: 4px 14px; }
  .table td::before { content: attr(data-label); display: block; font-size: 12px; color: var(--ink3); text-transform: uppercase; letter-spacing: .5px; }
  .table td:first-child { font-weight: 600; color: var(--ink); font-size: 17px; }
  .table td:first-child::before { display: none; }
  .card { padding: 18px; }
  .paper { gap: 16px; }
  .bar { grid-template-columns: 110px 1fr 64px; font-size: 14px; }
}
ol.steps ul { margin: 8px 0; padding-left: 20px; } ol.steps ul li { margin: 0 0 6px; }

/* community */
.threads { display: grid; gap: 16px; max-width: 860px; }
.card.thread h3 { font-size: 20px; margin: 0 0 8px; } .card.thread h3 a { color: var(--ink); text-decoration: none; } .card.thread h3 a:hover { color: var(--cyan); }
.card.thread p { margin: 0 0 10px; }
blockquote { margin: 10px 0; padding: 10px 14px; border-left: 3px solid var(--cyan); background: var(--bg3); border-radius: 0 8px 8px 0; }
blockquote p { margin: 0 0 6px; color: var(--ink); overflow-wrap: anywhere; }
blockquote footer { font-size: 13px; color: var(--ink3); }
blockquote.card { border-left: 3px solid var(--cyan); margin: 0; }

/* The tip window (home page) */
dialog.tipbox { width: min(680px, calc(100vw - 32px)); max-height: calc(100vh - 32px); overflow: auto; padding: 26px 26px 18px; box-sizing: border-box;
  background: var(--bg2); color: var(--ink); border: 2px solid var(--cyan); border-radius: 12px; box-shadow: 0 0 0 4px rgba(62, 224, 255, .12), 0 20px 60px rgba(0, 0, 0, .6); }
dialog.tipbox::backdrop { background: rgba(5, 7, 15, .78); backdrop-filter: blur(3px); }
.tipbox h3 { margin: 4px 0 6px; color: var(--gold); }
.tipbox h4 { margin: 0 0 8px; font-size: 16px; }
.tip-x { position: absolute; top: 10px; right: 12px; background: none; border: 0; color: var(--ink2); font-size: 28px; line-height: 1; cursor: pointer; padding: 4px 8px; }
.tip-x:hover { color: var(--gold); }
.tip-ways { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 16px 0 10px; }
.tip-way { background: var(--bg3); border: 1px solid var(--line); border-radius: 10px; padding: 16px; }
.tip-way p { font-size: 15px; color: var(--ink2); }
.tip-way .btn { padding: 10px 16px; font-size: 15px; }
.t-qr { display: block; width: 160px; height: 160px; margin: 0 auto 10px; background: #fff; border-radius: 8px; padding: 6px; }
.tip-way .addr code { font-size: 12px; overflow-wrap: anywhere; }
@media (max-width: 640px) {
  dialog.tipbox { padding: 22px 16px 14px; }
  .tip-ways { grid-template-columns: 1fr; }
}

/* The chains under the home introduction */
.chains { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 0; font-size: 14px; }
.chains span:not(.sr), .chains a { padding: 4px 10px; border: 1px solid var(--line); border-radius: 999px; background: var(--bg2); color: var(--ink); }
.chains a { color: var(--cyan); text-decoration: none; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* Coin logos (src/img/coins, the arcade's own pictures). Always beside the coin's written name. */
img.coin { width: 1.3em; height: 1.3em; vertical-align: -.3em; margin-right: .4em; object-fit: contain; }
.chains a { display: inline-flex; align-items: center; gap: 0; }
.chains a:hover { border-color: var(--cyan); color: var(--gold); }
.chains img.coin { width: 18px; height: 18px; margin-right: 6px; }
.logos { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 0; }
td .logos { margin-top: 8px; }
.logos img.coin { width: 26px; height: 26px; margin: 0; }
.foot-coins a { display: flex; flex-wrap: wrap; gap: 6px; opacity: .8; } .foot-coins a:hover { opacity: 1; }
.foot-coins img.coin { width: 22px; height: 22px; margin: 0; }
.coins { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin: 18px 0; }
.coin-card { position: relative; background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 18px 18px 14px 82px; min-height: 96px; }
.coin-card:hover { border-color: var(--cyan); }
.coin-card img.coin { position: absolute; left: 16px; top: 18px; width: 52px; height: 52px; margin: 0; filter: drop-shadow(0 0 10px rgba(62, 224, 255, .18)); }
.coin-card h3 { margin: 0 0 6px; font-size: 18px; }
.coin-card h3 small { font-size: 12px; color: var(--ink3); letter-spacing: 1px; margin-left: 4px; }
.coin-card p { margin: 0; font-size: 15px; color: var(--ink2); }
.coin-card .can { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.can span { font-size: 12px; padding: 2px 8px; border-radius: 999px; border: 1px solid rgba(92, 242, 154, .45); color: var(--green); }
.can span.soon { border-color: rgba(255, 210, 63, .45); color: var(--gold); }
h3 img.coin { width: 1.2em; height: 1.2em; }
@media (max-width: 640px) {
  .coin-card { padding-left: 74px; }
  .coin-card img.coin { width: 44px; height: 44px; }
}

/* Coin cards are links to the coin pages; the coin page header carries a big logo */
a.coin-card { display: block; color: inherit; text-decoration: none; }
a.coin-card:hover h3 { color: var(--gold); }
.coin-head { position: relative; padding-right: 150px; }
.coin-head img.hero-coin { position: absolute; right: 16px; top: 40px; width: 112px; height: 112px; margin: 0; filter: drop-shadow(0 0 22px rgba(62, 224, 255, .25)); }
.page-head .kicker a { color: inherit; text-decoration: none; } .page-head .kicker a:hover { color: var(--gold); }
td a img.coin { vertical-align: -.3em; }
@media (max-width: 640px) {
  .coin-head { padding-right: 16px; padding-top: 84px; }
  .coin-head img.hero-coin { left: 16px; right: auto; top: 20px; width: 56px; height: 56px; }
}