/* Pawnshake docs. Vanilla paper, plum ink, one hot magenta. */
:root {
  --paper: #fdf6e9;
  --paper-2: #f6ead3;
  --cream: #fffbf3;
  --ink: #2b0e30;
  --ink-2: #5b3b60;
  --ink-3: #8a6f8e;
  --plum-deep: #1f0823;
  --magenta: #e2147d;
  --magenta-2: #ff4fa3;
  --rule: #ecdcc0;
  --ok: #138a6b;
  --bad: #d3263c;
  --warn: #b86e00;

  /* byte kinds */
  --k-magic: #cdb8f5;
  --k-hash: #ffd56e;
  --k-sig: #ff9fcf;
  --k-int: #a6ebd3;
  --k-op: #ff8a66;
  --k-key: #9ccaff;
  --k-text: #f1d9ae;
  --k-arg: #e7b3ff;
  --k-var: #c4f08e;

  --display: "Shrikhand", "Cooper Black", serif;
  --body: "Atkinson Hyperlegible Next", "Atkinson Hyperlegible", ui-sans-serif, sans-serif;
  --mono: "Martian Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --bar: 64px;
  --radius: 18px;
  --lift: 0 1px 0 #fff inset, 0 12px 30px -20px rgba(58, 18, 64, 0.45);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--bar) + 20px); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.65 var(--body);
  -webkit-font-smoothing: antialiased;
}
body.nav-open { overflow: hidden; }
a { color: var(--magenta); text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
a:hover { color: var(--ink); }
::selection { background: var(--magenta-2); color: #fff; }
:focus-visible { outline: 2.5px solid var(--magenta); outline-offset: 2px; border-radius: 6px; }

/* ---------------------------------------------------------------- top bar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  gap: 14px;
  height: var(--bar);
  padding: 0 24px;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(14px) saturate(1.3);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
  border-bottom: 1px solid var(--rule);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand span { font: 24px/1 var(--display); padding-top: 4px; }
.brand img { border-radius: 10px; display: block; }
.ver { font: 600 11px/1 var(--mono); color: var(--ink-3); border: 1px solid var(--rule); padding: 6px 9px; border-radius: 99px; white-space: nowrap; }
.top-links { margin-left: auto; display: flex; gap: 4px; align-items: center; }
.top-links a { color: var(--ink-2); text-decoration: none; font-weight: 600; font-size: 15px; padding: 8px 13px; border-radius: 99px; }
.top-links a:hover { background: var(--paper-2); color: var(--ink); }
.top-links .gh { background: var(--ink); color: var(--cream); }
.top-links .gh:hover { background: var(--magenta); color: #fff; }
.nav-toggle { display: none; }

/* ---------------------------------------------------------------- shell */
.shell {
  display: grid;
  grid-template-columns: 236px minmax(0, 1fr) 200px;
  gap: 48px;
  max-width: 1340px;
  margin: 0 auto;
  padding: 0 32px;
}
.sidebar {
  position: sticky;
  top: var(--bar);
  align-self: start;
  max-height: calc(100vh - var(--bar));
  overflow-y: auto;
  padding: 36px 4px 40px 0;
}
.nav-group { margin-bottom: 24px; }
.nav-head { margin: 0 0 6px 12px; font: 600 11px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.14em; color: var(--ink-3); }
.nav-group ul { list-style: none; margin: 0; padding: 0; }
.nav-group a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 12px;
  border-radius: 12px;
  color: var(--ink-2);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.3;
  transition: background 0.15s, color 0.15s;
}
.nav-dot { width: 6px; height: 6px; border-radius: 50%; background: #dccab0; flex: none; transition: transform 0.2s, background 0.2s; }
.nav-group a:hover { background: var(--paper-2); color: var(--ink); }
.nav-group a:hover .nav-dot { background: var(--magenta-2); }
.nav-group a[aria-current="page"] { background: var(--ink); color: var(--cream); }
.nav-group a[aria-current="page"] .nav-dot { background: var(--magenta-2); transform: scale(1.4); }

.content { min-width: 0; padding: 44px 0 80px; }
.toc { position: sticky; top: var(--bar); align-self: start; padding: 44px 0; max-height: calc(100vh - var(--bar)); overflow-y: auto; }
.toc-head { font: 600 11px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.14em; color: var(--ink-3); margin: 0 0 12px; }
.toc ul { list-style: none; padding: 0; margin: 0; border-left: 2px solid var(--rule); }
.toc a { display: block; padding: 5px 0 5px 14px; margin-left: -2px; border-left: 2px solid transparent; color: var(--ink-3); text-decoration: none; font-size: 14px; line-height: 1.35; }
.toc a:hover { color: var(--ink); }
.toc a.on { color: var(--magenta); border-left-color: var(--magenta); font-weight: 600; }

/* ---------------------------------------------------------------- page head */
.page-head { margin: 0 0 40px; max-width: 760px; animation: rise 0.5s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
.eyebrow { font: 600 12px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.16em; color: var(--magenta); margin: 0 0 14px; }
.page-head h1 { font: clamp(40px, 5vw, 60px)/1.04 var(--display); margin: 0; color: var(--ink); text-shadow: 3px 3px 0 var(--k-sig); }
.lead { font-size: 20px; line-height: 1.55; color: var(--ink-2); margin: 18px 0 0; }

/* ---------------------------------------------------------------- prose */
.prose { max-width: 780px; }
.prose > * { animation: rise 0.5s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
.prose > :nth-child(2) { animation-delay: 0.03s; }
.prose > :nth-child(3) { animation-delay: 0.06s; }
.prose > :nth-child(n + 4) { animation-delay: 0.09s; }
.prose > :first-child { margin-top: 0; }
.prose p { margin: 0 0 16px; }
.prose h2 { font: 30px/1.18 var(--display); margin: 60px 0 16px; color: var(--ink); }
.prose h3 { font-weight: 800; font-size: 19px; line-height: 1.35; margin: 34px 0 8px; color: var(--ink); }
.prose h2 + h3 { margin-top: 18px; }
.prose h2, .prose h3 { position: relative; }
.anchor { position: absolute; left: -24px; opacity: 0; color: var(--magenta-2); text-decoration: none; font-family: var(--body); font-weight: 600; }
.prose h2:hover .anchor, .prose h3:hover .anchor { opacity: 1; }
.prose ul, .prose ol { padding-left: 22px; margin: 0 0 18px; }
.prose li { margin: 6px 0; }
.prose li::marker { color: var(--magenta); }
.prose strong { font-weight: 800; }
.prose code {
  font: 0.8em/1 var(--mono);
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 2px 5px;
  overflow-wrap: anywhere;
}
.prose pre {
  position: relative;
  background: var(--plum-deep);
  color: #f6e3f1;
  font: 13px/1.7 var(--mono);
  padding: 20px 22px;
  margin: 22px 0;
  border-radius: var(--radius);
  overflow-x: auto;
  box-shadow: var(--lift);
}
.prose pre code { background: none; border: 0; padding: 0; font-size: inherit; white-space: pre; color: inherit; overflow-wrap: normal; }
.prose pre .c { color: #a983ad; }
.prose pre .k { color: var(--magenta-2); }
.prose pre .s { color: var(--k-hash); }
.copy {
  position: absolute;
  top: 10px;
  right: 10px;
  font: 600 11px/1 var(--mono);
  background: rgba(255, 255, 255, 0.08);
  color: #f6e3f1;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  padding: 6px 9px;
  cursor: pointer;
}
.copy:hover { background: var(--magenta); border-color: var(--magenta); }

.table-wrap { margin: 22px 0; overflow-x: auto; border: 1px solid var(--rule); border-radius: 16px; background: var(--cream); -webkit-overflow-scrolling: touch; }
.prose table { width: 100%; border-collapse: collapse; font-size: 15px; }
.prose th { text-align: left; font: 600 11px/1.3 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-3); background: var(--paper-2); padding: 12px 14px; white-space: nowrap; }
.prose td { padding: 11px 14px; border-top: 1px solid var(--rule); vertical-align: top; }
.prose tr:hover td { background: #fff7e8; }
.prose td code { white-space: nowrap; overflow-wrap: normal; }
.yes { color: var(--ok); font-weight: 800; }
.no { color: var(--bad); font-weight: 800; }

/* ---------------------------------------------------------------- callouts */
.callout { border-radius: var(--radius); padding: 18px 22px; margin: 26px 0; background: var(--cream); border: 1.5px solid var(--ink); box-shadow: 5px 5px 0 var(--accent, var(--ink)); }
.callout p:last-child { margin-bottom: 0; }
.callout-title { margin: 0 0 6px !important; font: 600 11px/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.12em; color: var(--accent, var(--ink)); }
.c-tip { --accent: var(--ok); }
.c-warn { --accent: var(--warn); }
.c-idea { --accent: var(--magenta); }
.c-rule { background: var(--ink); color: var(--cream); --accent: var(--magenta); }
.c-rule p, .c-rule li { color: #f6e3f1; }
.c-rule .callout-title { color: var(--magenta-2); font: 22px/1.2 var(--display); text-transform: none; letter-spacing: 0; margin-bottom: 8px !important; }
.c-rule code { background: rgba(255, 255, 255, 0.1); border-color: rgba(255, 255, 255, 0.18); color: #fff; }
.c-rule a { color: var(--magenta-2); }

/* ---------------------------------------------------------------- figures */
figure { margin: 28px 0; }
figcaption { font: 600 12px/1.45 var(--mono); color: var(--ink-3); margin-bottom: 12px; display: flex; gap: 12px; align-items: baseline; }
.layout-title { color: var(--ink); text-transform: uppercase; letter-spacing: 0.1em; }
.layout-total { margin-left: auto; color: var(--magenta); white-space: nowrap; }
.layout-cap { font-size: 14.5px; color: var(--ink-2); margin: 12px 0 0 !important; }

/* byte strips */
.lf-row { display: flex; gap: 5px; flex-wrap: wrap; }
.lf {
  flex-basis: 0;
  min-width: auto;
  display: flex;
  flex-direction: column;
  padding: 10px 11px 9px;
  border-radius: 10px;
  border: 1.5px solid var(--ink);
  box-shadow: 0 3px 0 var(--ink);
  transition: transform 0.15s, box-shadow 0.15s;
}
.lf:hover, .lf:focus { transform: translateY(-2px); box-shadow: 0 5px 0 var(--ink); outline: none; }
.lf-name { font: 600 12.5px/1.25 var(--mono); color: var(--ink); white-space: nowrap; }
.lf-size { font: 11px/1 var(--mono); color: rgba(43, 14, 48, 0.62); margin-top: 6px; }
.lf-note { font-size: 12.5px; line-height: 1.3; color: var(--ink-2); margin-top: 6px; }
.k-magic { background: var(--k-magic); }
.k-hash { background: var(--k-hash); }
.k-sig { background: var(--k-sig); }
.k-int { background: var(--k-int); }
.k-op { background: var(--k-op); }
.k-key { background: var(--k-key); }
.k-text { background: var(--k-text); }
.k-arg { background: var(--k-arg); }
.k-var { background: var(--k-var); }

/* hex dumps */
.hexdump { background: var(--plum-deep); border-radius: var(--radius); padding: 18px 20px 16px; box-shadow: var(--lift); }
.hexdump figcaption .layout-title { color: #f6e3f1; }
.hexdump figcaption .layout-total { color: var(--magenta-2); }
.hx { overflow-x: auto; }
.hx-row { display: flex; gap: 14px; font: 12.5px/1 var(--mono); padding: 1.5px 0; white-space: nowrap; }
.hx-off { color: #7d5c82; width: 3.4em; flex: none; padding-top: 4px; }
.hx-bytes { display: flex; gap: 3px; }
.hb { display: inline-block; width: 2.2em; text-align: center; padding: 4px 0; border-radius: 4px; color: var(--plum-deep); font-weight: 600; transition: transform 0.12s; }
.hb:hover { transform: scale(1.3); position: relative; z-index: 2; box-shadow: 0 0 0 2px #fff; }
.hb.first { box-shadow: inset 2px 0 0 rgba(31, 8, 35, 0.75); }
.hx-readout { margin: 12px 0 0; min-height: 1.4em; font: 600 12px/1.4 var(--mono); color: var(--k-hash); }
.hx-readout:empty::before { content: "Tap or hover a byte"; color: #7d5c82; font-weight: 400; }
.hb.on { outline: 2px solid #fff; outline-offset: 1px; position: relative; z-index: 2; }
.hx-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 14px; font: 12px/1.3 var(--mono); }
.hx-leg { background: none !important; color: #e9d3e6; display: inline-flex; align-items: center; gap: 7px; }
.hx-leg b { color: #a983ad; font-weight: 400; }
.hx-leg i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; flex: none; }
.hx-leg.k-magic i { background: var(--k-magic); }
.hx-leg.k-hash i { background: var(--k-hash); }
.hx-leg.k-sig i { background: var(--k-sig); }
.hx-leg.k-int i { background: var(--k-int); }
.hx-leg.k-op i { background: var(--k-op); }
.hx-leg.k-key i { background: var(--k-key); }
.hx-leg.k-text i { background: var(--k-text); }
.hx-leg.k-arg i { background: var(--k-arg); }
.hx-leg.k-var i { background: var(--k-var); }
.swatches { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 8px; }
.swatches .hx-leg { color: var(--ink); background: var(--cream) !important; border: 1px solid var(--rule); border-radius: 99px; padding: 5px 10px 5px 7px; font: 600 12px/1 var(--mono); }
.swatches .hx-leg i { border: 1px solid rgba(43, 14, 48, 0.35); }

/* diagrams */
.diagram { background: var(--cream); border: 1px solid var(--rule); border-radius: 20px; padding: 18px 16px 10px; box-shadow: var(--lift); }
.diagram figcaption { padding: 0 6px; }
.diagram svg { width: 100%; height: auto; display: block; font-family: var(--body); }
.scroll-x { overflow-x: auto; -webkit-overflow-scrolling: touch; overscroll-behavior-x: contain; }
.scroll-hint { display: none; }
.sq-life { stroke: #e3d1b4; stroke-width: 2; stroke-dasharray: 2 6; stroke-linecap: round; }
.sq-head rect { stroke: var(--ink); stroke-width: 1.5; }
.sq-head text { font-weight: 800; font-size: 14px; }
.l-white rect { fill: #fff; }
.l-white text { fill: var(--ink); }
.l-black rect { fill: var(--ink); }
.l-black text { fill: var(--cream); }
.l-server rect { fill: var(--k-key); }
.l-server text { fill: var(--ink); }
.sq-line { stroke-width: 2.4; fill: none; }
.sq-line.dashed { stroke-dasharray: 6 6; }
.t-plain { stroke: var(--ink); fill: var(--ink); }
.t-ok { stroke: var(--ok); fill: var(--ok); }
.t-bad { stroke: var(--bad); fill: var(--bad); }
.t-warn { stroke: var(--warn); fill: var(--warn); }
.t-muted { stroke: #c3aec4; fill: #9a839d; }
.ah { stroke: none; }
text.sq-label { font: 600 12.5px var(--mono); paint-order: stroke; stroke: var(--cream); stroke-width: 5px; stroke-linejoin: round; }
.attack text.sq-label { stroke: #fff; }
.sq-cut line { stroke: var(--bad); stroke-width: 3; stroke-linecap: round; }
.sq-note rect { fill: var(--paper-2); stroke: var(--rule); }
.sq-note text { font-size: 12.5px; font-weight: 600; fill: var(--ink-2); stroke: none; }
.sq-note.t-ok rect { fill: #dcf4ea; stroke: #9ed9c1; }
.sq-note.t-ok text { fill: var(--ok); }
.sq-note.t-bad rect { fill: #fde1e5; stroke: #f1a9b4; }
.sq-note.t-bad text { fill: var(--bad); }
.sq-note.t-warn rect { fill: #fff0d1; stroke: #f0cf86; }
.sq-note.t-warn text { fill: var(--warn); }

.ch-card rect { stroke: var(--ink); stroke-width: 1.5; }
.ch-card text { font: 700 13px var(--mono); stroke: none; }
.ch-card text.sub { font: 500 10.5px var(--body); }
.ch-card.s-w rect { fill: #fff; }
.ch-card.s-w text { fill: var(--ink); }
.ch-card.s-b rect { fill: var(--ink); }
.ch-card.s-b text { fill: var(--cream); }
.ch-card.ct-ack.s-w rect { fill: var(--paper-2); }
.ch-card.ct-ack.s-b rect { fill: #5b3b60; }
.ch-card.ct-hot rect { fill: var(--magenta); stroke: var(--magenta); }
.ch-card.ct-hot text { fill: #fff; }
.ch-card.ct-ok rect { fill: #dcf4ea; stroke: var(--ok); }
.ch-card.ct-ok text { fill: var(--ok); }
.ch-card.ct-bad rect { fill: #fde1e5; stroke: var(--bad); stroke-dasharray: 5 4; }
.ch-card.ct-bad text { fill: var(--bad); }
.ch-card.fork { filter: drop-shadow(0 6px 10px rgba(211, 38, 60, 0.3)); }
.ch-gen rect { fill: var(--k-magic); stroke: var(--ink); stroke-width: 1.5; }
.ch-gen text { font: 700 13px var(--mono); fill: var(--ink); }
.ch-gen text.sub { font: 500 10.5px var(--body); }
.ch-prev { stroke: var(--ink); stroke-width: 2; fill: none; }
.ch-ah { fill: var(--ink); }
.ch-seen { stroke: var(--magenta); stroke-width: 2; fill: none; stroke-dasharray: 5 4; }
.ch-sh { fill: var(--magenta); }
.ch-lane { font: 600 11px var(--mono); text-transform: uppercase; letter-spacing: 0.12em; fill: var(--ink-3); }

/* board */
.board { max-width: 380px; margin: 0; }
.board svg { width: 100%; border-radius: 14px; box-shadow: 0 0 0 2px var(--ink), 6px 6px 0 var(--ink); display: block; }
.sqr.lt { fill: #fbeedb; }
.sqr.dk { fill: #e5a8c9; }
.pc { font-family: "Segoe UI Symbol", "Noto Sans Symbols 2", "Apple Symbols", serif; }
.pc.pw { fill: #fffaf0; stroke: var(--ink); stroke-width: 1.1px; paint-order: stroke; }
.pc.pb { fill: var(--ink); }
.coord { font: 600 10px var(--mono); fill: rgba(43, 14, 48, 0.55); }
.arw { stroke: rgba(58, 18, 64, 0.32); stroke-width: 3; stroke-linecap: round; }
.arw.hot { stroke: var(--magenta); stroke-width: 5; }
.arw-n circle { fill: #fff; stroke: var(--ink); stroke-width: 1.5; }
.arw-n text { font-family: var(--mono); font-weight: 700; fill: var(--ink); }
.arw-n.hot circle { fill: var(--magenta); stroke: var(--magenta); }
.arw-n.hot text { fill: #fff; }

/* timelines */
.tl { margin: 26px 0; background: var(--cream); border: 1px solid var(--rule); border-radius: 20px; padding: 20px 20px 16px; box-shadow: var(--lift); }
.tl-row { display: grid; grid-template-columns: 76px 1fr; align-items: center; gap: 12px; margin: 10px 0; }
.tl-who { font: 600 11.5px/1 var(--mono); color: var(--ink-2); text-transform: uppercase; letter-spacing: 0.08em; }
.tl-bar { display: flex; height: 34px; border-radius: 10px; overflow: hidden; border: 1.5px solid var(--ink); }
.tl-bar > span { display: flex; align-items: center; justify-content: center; font: 600 11px/1 var(--mono); color: var(--ink); white-space: nowrap; overflow: hidden; min-width: 0; }
.tl-think { background: var(--k-sig); }
.tl-transit { background: repeating-linear-gradient(135deg, #fff 0 6px, var(--paper-2) 6px 12px); color: var(--ink-3) !important; }
.tl-wait { background: var(--paper-2); color: var(--ink-3) !important; }
.tl-pause { background: var(--k-hash); }
.tl-think.b { background: var(--ink); color: var(--cream) !important; }
.tl-cancel { background: var(--bad); color: #fff !important; }
.tl-cap { font-size: 14px; color: var(--ink-2); margin: 12px 0 0 !important; }
.tl-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; margin: 14px 0 0; font-size: 13px; color: var(--ink-2); }
.tl-legend span { display: inline-flex; align-items: center; gap: 7px; }
.tl-legend i { width: 18px; height: 12px; border-radius: 4px; border: 1px solid var(--ink); display: inline-block; }

/* ---------------------------------------------------------------- cards */
.grid { display: grid; gap: 16px; margin: 24px 0; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card {
  position: relative;
  display: block;
  background: var(--cream);
  border: 1.5px solid var(--ink);
  border-radius: var(--radius);
  padding: 20px 20px 18px;
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform 0.18s, box-shadow 0.18s;
  text-decoration: none;
  color: var(--ink);
}
a.card:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--magenta); color: var(--ink); }
.card h3 { margin: 0 0 6px !important; font-size: 18px; }
.card p { margin: 0; font-size: 15px; color: var(--ink-2); }
.card .kicker { font: 600 11px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.12em; color: var(--magenta); margin-bottom: 10px; display: block; }
.mode-card { overflow: hidden; }
.mode-card .glyph { position: absolute; right: 14px; top: 8px; font: 60px/1 var(--display); color: var(--paper-2); z-index: 0; }
.mode-card > * { position: relative; z-index: 1; }
.pill { display: inline-block; font: 600 11px/1 var(--mono); padding: 6px 9px; border-radius: 99px; background: var(--paper-2); border: 1px solid var(--rule); color: var(--ink-2); margin: 12px 6px 0 0; white-space: nowrap; }
td .pill { margin: 0; }
.pill.hot { background: var(--magenta); color: #fff; border-color: var(--magenta); }
.pill.bad { background: #fde1e5; color: var(--bad); border-color: #f1a9b4; }

/* steps */
.steps { counter-reset: st; list-style: none; padding: 0 !important; margin: 24px 0; }
.steps > li { counter-increment: st; position: relative; padding: 4px 0 18px 54px; margin: 0; }
.steps > li::before { content: counter(st); position: absolute; left: 0; top: 0; width: 36px; height: 36px; border-radius: 50%; background: var(--ink); color: var(--cream); font: 18px/36px var(--display); text-align: center; }
.steps > li::after { content: ""; position: absolute; left: 17px; top: 42px; bottom: 4px; width: 2px; background: var(--rule); }
.steps > li:last-child::after { display: none; }
.steps > li > strong:first-child { display: block; font-size: 17px; margin-bottom: 2px; }

/* attacks */
.attack-map { background: var(--cream); border: 1px solid var(--rule); border-radius: 20px; padding: 0 20px; margin: 26px 0; }
.attack-map > summary { cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 0; font-weight: 800; font-size: 16px; }
.attack-map > summary::-webkit-details-marker { display: none; }
.attack-map > summary::after { content: ""; width: 9px; height: 9px; border-right: 2px solid var(--ink-2); border-bottom: 2px solid var(--ink-2); transform: rotate(45deg) translateY(-3px); transition: transform 0.2s; flex: none; }
.attack-map[open] > summary::after { transform: rotate(-135deg) translate(-3px, 0); }
.attack-map[open] > summary { padding-bottom: 12px; }
.attack-map[open] { padding-bottom: 4px; }
.attack-index-group > p { margin: 0 0 8px; font: 600 11px/1.45 var(--mono); text-transform: uppercase; letter-spacing: 0.12em; color: var(--ink-3); }
.attack-index { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 16px; }
.attack-index a { display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; font-weight: 600; text-decoration: none; padding: 6px 11px; border-radius: 99px; background: #fff; border: 1px solid var(--ink); color: var(--ink); }
.attack-index a:hover { background: var(--ink); color: var(--cream); }
.attack-index a::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--ink-3); flex: none; }
.attack-index a.ai-lose::before { background: var(--bad); }
.attack-index a.ai-none::before { background: var(--ok); }
.attack-index a.ai-cancel::before, .attack-index a.ai-dispute::before { background: var(--warn); }
.attack-index a.ai-void::before { background: var(--ink-2); }
.attack { background: var(--cream); border: 1.5px solid var(--ink); border-radius: 20px; padding: 22px 24px 18px; margin: 20px 0; box-shadow: 5px 5px 0 var(--ink); }
.attack header { display: flex; align-items: flex-start; gap: 12px; }
.attack h3 { margin: 0 !important; font-size: 20px; }
.attack-badge { margin-left: auto; flex: none; font: 600 10.5px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; padding: 7px 10px; border-radius: 99px; color: #fff; white-space: nowrap; }
.a-lose .attack-badge { background: var(--bad); }
.a-void .attack-badge { background: var(--ink-2); }
.a-none .attack-badge { background: var(--ok); }
.a-cancel .attack-badge, .a-dispute .attack-badge { background: var(--warn); }
.a-limit .attack-badge { background: var(--ink-3); }
.a-limit { border-style: dashed; box-shadow: 5px 5px 0 var(--ink-3); }
.attack-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 14px; }
.attack-cols p { margin: 0 !important; font-size: 15.5px; }
.attack-cols .attack-k { font: 600 11px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.1em; color: var(--magenta); margin-bottom: 8px !important; }
.attack .diagram { box-shadow: none; margin: 18px 0 4px; background: #fff; }
.attack-out { margin: 14px 0 0 !important; padding-top: 12px; border-top: 1px dashed var(--rule); font-size: 15.5px; }
.attack-out span { font: 600 11px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-3); margin-right: 8px; }

/* ---------------------------------------------------------------- pager & foot */
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 64px 0 0; max-width: 780px; }
.pg { display: block; padding: 16px 20px; border-radius: var(--radius); border: 1.5px solid var(--ink); text-decoration: none; color: var(--ink); font-weight: 800; font-size: 17px; line-height: 1.3; background: var(--cream); transition: transform 0.15s, box-shadow 0.15s; }
.pg:hover { transform: translateY(-2px); box-shadow: 0 5px 0 var(--ink); color: var(--ink); }
.pg span { display: block; font: 600 11px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.12em; color: var(--magenta); margin-bottom: 8px; }
.pg.next { text-align: right; grid-column: 2; }
.foot { margin-top: 44px; padding-top: 20px; border-top: 1px solid var(--rule); font-size: 14px; color: var(--ink-3); max-width: 780px; }

/* ---------------------------------------------------------------- home hero */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(60% 80% at 78% 30%, rgba(226, 20, 125, 0.5), transparent 70%),
    radial-gradient(50% 60% at 10% 90%, rgba(150, 40, 160, 0.4), transparent 70%),
    var(--plum-deep);
  color: var(--cream);
  padding: 64px 32px 0;
}
.hero-in { max-width: 1240px; margin: 0 auto; display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 32px; align-items: center; }
.hero .eyebrow { color: var(--k-sig); }
.hero h1 { font: clamp(46px, 7vw, 88px)/1 var(--display); margin: 0; color: var(--cream); text-shadow: 4px 4px 0 var(--magenta), 8px 8px 0 #5c1a63; }
.hero .lead { color: #ead3e8; font-size: 21px; max-width: 32em; margin-top: 24px; }
.hero-cta { display: flex; gap: 12px; margin: 30px 0 0; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 14px 22px; border-radius: 99px; font-weight: 800; font-size: 16px; text-decoration: none; transition: transform 0.15s, box-shadow 0.15s; }
.btn.primary { background: var(--magenta); color: #fff; box-shadow: 0 5px 0 #8f0a4e; }
.btn.primary:hover { transform: translateY(-2px); box-shadow: 0 7px 0 #8f0a4e; color: #fff; }
.btn.ghost { color: var(--cream); border: 1.5px solid rgba(255, 255, 255, 0.35); }
.btn.ghost:hover { background: rgba(255, 255, 255, 0.08); color: #fff; }
.hero-art img { width: 100%; max-width: 540px; display: block; margin: 0 auto; filter: drop-shadow(0 30px 40px rgba(0, 0, 0, 0.45)); animation: bob 6s ease-in-out infinite; }
.hero-wire { margin: 32px 0 0; background: rgba(0, 0, 0, 0.28); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 16px; padding: 14px 16px 12px; max-width: 30em; }
.hero-wire figcaption { color: #d9b9dc; font: 600 11px/1.3 var(--mono); text-transform: uppercase; letter-spacing: 0.1em; margin: 0 0 10px; }
.hw-bytes { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.hero-wire .hb { width: 2.4em; padding: 5px 0; font: 600 12px/1 var(--mono); border-radius: 5px; }
.hw-more { font: 600 12px/1 var(--mono); color: #a983ad; margin-left: 4px; }
.hw-key { display: flex; flex-wrap: wrap; gap: 4px 14px; margin-top: 10px; font-size: 13px; color: #d9b9dc; }
.hw-key span { display: inline-flex; align-items: center; gap: 6px; }
.hw-key i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.hero-stats { max-width: 1240px; margin: 52px auto 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(255, 255, 255, 0.12); }
.hero-stats div { padding: 22px 8px 28px 0; }
.hero-stats b { display: block; font: 38px/1.1 var(--display); color: var(--magenta-2); }
.hero-stats span { display: block; font-size: 14.5px; line-height: 1.45; color: #d9b9dc; margin-top: 4px; }
.drip { display: block; width: calc(100% + 64px); height: 56px; margin: -1px -32px 0; }
.home .content { padding-top: 24px; }

/* ---------------------------------------------------------------- phone drawer */
.drawer { display: none; }

@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@keyframes bob { 0%, 100% { transform: translateY(0) rotate(-1.5deg); } 50% { transform: translateY(-12px) rotate(1.5deg); } }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

/* ---------------------------------------------------------------- responsive */
@media (max-width: 1180px) {
  .shell { grid-template-columns: 220px minmax(0, 1fr); gap: 40px; }
  .toc { display: none; }
}

@media (max-width: 860px) {
  :root { --bar: 58px; --radius: 16px; }
  body { font-size: 16.5px; line-height: 1.62; }
  .topbar { padding: 0 12px 0 6px; gap: 6px; }
  .brand span { font-size: 21px; }
  .brand img { width: 30px; height: 30px; }
  .ver, .top-links a:not(.gh) { display: none; }
  .top-links .gh { padding: 8px 14px; font-size: 14px; }

  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 0 11px;
    background: none;
    border: 0;
    border-radius: 12px;
    color: var(--ink);
    cursor: pointer;
  }
  .nav-toggle span { display: block; height: 2px; background: currentColor; border-radius: 2px; transition: transform 0.25s, opacity 0.2s; }
  body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
  body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .drawer { display: block; position: fixed; top: var(--bar); left: 0; right: 0; bottom: 0; z-index: 55; pointer-events: none; }
  .drawer-scrim { position: absolute; inset: 0; background: rgba(31, 8, 35, 0.35); opacity: 0; transition: opacity 0.25s; }
  .drawer-panel {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: min(340px, 86vw);
    overflow-y: auto;
    overscroll-behavior: contain;
    background: var(--paper);
    border-right: 1px solid var(--rule);
    padding: 22px 14px 32px;
    transform: translateX(-102%);
    transition: transform 0.28s cubic-bezier(0.2, 0.7, 0.2, 1), box-shadow 0.28s;
  }
  body.nav-open .drawer { pointer-events: auto; }
  body.nav-open .drawer-scrim { opacity: 1; }
  body.nav-open .drawer-panel { transform: none; box-shadow: 12px 0 40px -20px rgba(31, 8, 35, 0.5); }
  .drawer-panel .nav-group a { padding: 10px 12px; font-size: 16px; }
  .drawer-gh { display: block; margin: 8px 12px 0; padding: 12px 16px; border-radius: 12px; background: var(--ink); color: var(--cream); text-decoration: none; font-weight: 700; text-align: center; }

  .shell { grid-template-columns: minmax(0, 1fr); padding: 0 18px; gap: 0; }
  .sidebar { display: none; }
  .content { padding: 28px 0 56px; }

  .page-head { margin-bottom: 30px; }
  .page-head h1 { font-size: 40px; text-shadow: 2px 2px 0 var(--k-sig); }
  .lead { font-size: 18px; margin-top: 14px; }
  .prose h2 { font-size: 26px; margin: 46px 0 12px; }
  .prose h3 { font-size: 18px; margin: 28px 0 6px; }
  .anchor { display: none; }
  .prose pre { font-size: 12px; padding: 16px; }
  .prose table { font-size: 14px; }
  .prose th, .prose td { padding: 10px 12px; }

  .callout { padding: 16px 18px; box-shadow: 4px 4px 0 var(--accent, var(--ink)); }
  .c-rule .callout-title { font-size: 20px; }

  .grid-2, .grid-3, .attack-cols { grid-template-columns: 1fr; }
  .attack-cols { gap: 14px; }
  .attack { padding: 18px 18px 14px; box-shadow: 4px 4px 0 var(--ink); }
  .attack h3 { font-size: 18px; }
  .attack-map { padding: 0 16px; }
  .attack-index a { font-size: 13px; padding: 5px 10px; }

  .diagram { padding: 14px 0 8px; }
  .diagram figcaption { padding: 0 14px; }
  .table-wrap.at-end { -webkit-mask-image: none; mask-image: none; }
  .table-wrap.can-scroll { -webkit-mask-image: linear-gradient(90deg, #000 85%, rgba(0, 0, 0, 0.25)); mask-image: linear-gradient(90deg, #000 85%, rgba(0, 0, 0, 0.25)); }
  .table-wrap + .scroll-hint { margin: -14px 0 18px; padding: 0 4px; }
  .scroll-hint { display: block; padding: 8px 14px 2px; font: 600 10.5px/1 var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.1em; }

  /* hex dumps: all 16 bytes of a row still fit */
  .hexdump { padding: 14px 12px 12px; }
  .hx-off { display: none; }
  .hx-row { font-size: 9.5px; }
  .hx-bytes { gap: 2px; }
  .hb { width: 18px; padding: 3px 0; border-radius: 3px; }
  .hx-legend { font-size: 11px; gap: 5px 12px; }

  /* byte strips become a list: one field per line, size and note beside it */
  .lf-row { flex-direction: column; gap: 4px; }
  .lf { flex-basis: auto; display: grid; grid-template-columns: minmax(0, 7.5em) 4.2em 1fr; align-items: baseline; column-gap: 10px; padding: 8px 12px; box-shadow: 0 2px 0 var(--ink); }
  .lf:hover, .lf:focus { transform: none; box-shadow: 0 2px 0 var(--ink); }
  .lf-name { font-size: 12px; white-space: normal; overflow-wrap: anywhere; }
  .lf-size { margin: 0; white-space: nowrap; }
  .lf-note { margin: 0; font-size: 12.5px; }
  .tl { padding: 16px 14px 12px; }
  .tl-row { grid-template-columns: 1fr; gap: 6px; margin: 12px 0; }
  .tl-bar > span { font-size: 10px; }
  .tl-bar > .tl-transit, .tl-bar > .tl-wait { font-size: 0; }
  .copy { display: none; }

  .board { max-width: 100%; }
  .pager { gap: 10px; margin-top: 48px; }
  .pg { padding: 14px; font-size: 15px; }

  .hero { padding: 28px 20px 0; }
  .drip { width: calc(100% + 40px); margin: -1px -20px 0; height: 40px; }
  .hero-in { grid-template-columns: 1fr; gap: 8px; }
  .hero-art { order: -1; }
  .hero-art img { max-width: 260px; }
  .hero h1 { font-size: 46px; text-shadow: 3px 3px 0 var(--magenta), 6px 6px 0 #5c1a63; }
  .hero .lead { font-size: 18px; margin-top: 18px; }
  .hero-cta .btn { flex: 1 1 auto; }
  .hero-wire .hb { width: 2.2em; font-size: 11px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); margin-top: 36px; }
  .hero-stats div { padding: 18px 8px 20px 0; }
  .hero-stats b { font-size: 30px; }
  .hero-stats span { font-size: 13.5px; }
}

/* card titles (not section headings, so no anchors and no TOC entry) */
.card .card-title { margin: 0 0 6px !important; font-weight: 800; font-size: 18px; line-height: 1.3; color: var(--ink); }

@media (max-width: 860px) {
  .pager { grid-template-columns: 1fr; }
  .pager > span:empty { display: none; }
  .pg.next { grid-column: 1; }
}

/* diagrams come in two drawings: wide for screens with room, narrow for phones */
.diagram svg.v-narrow { display: none; }
@media (max-width: 640px) {
  .diagram svg.v-wide { display: none; }
  .diagram svg.v-narrow { display: block; max-width: 420px; margin: 0 auto; }
  .diagram { padding: 14px 10px 10px; }
  .diagram figcaption { padding: 0 6px; }
}
.ch-fork { stroke: var(--bad); stroke-width: 2; stroke-dasharray: 3 4; }

/* phones: tables with three or more columns become one card per row */
@media (max-width: 640px) {
  .table-wrap:has(table.cols-3, table.cols-4, table.cols-5) { background: none; border: 0; border-radius: 0; overflow: visible; -webkit-mask-image: none; mask-image: none; }
  .table-wrap:has(table.cols-3, table.cols-4, table.cols-5) + .scroll-hint { display: none; }
  .prose :is(table.cols-3, table.cols-4, table.cols-5) { display: block; border: 0; background: none; }
  .prose :is(table.cols-3, table.cols-4, table.cols-5) tbody { display: grid; gap: 10px; }
  .prose :is(table.cols-3, table.cols-4, table.cols-5) tr:first-child:has(th) { display: none; }
  .prose :is(table.cols-3, table.cols-4, table.cols-5) tr { display: block; background: var(--cream); border: 1px solid var(--rule); border-radius: 14px; padding: 12px 14px; }
  .prose :is(table.cols-3, table.cols-4, table.cols-5) tr:hover td { background: none; }
  .prose :is(table.cols-3, table.cols-4, table.cols-5) td { display: grid; grid-template-columns: 7.2em 1fr; gap: 10px; padding: 5px 0; border: 0; }
  .prose :is(table.cols-3, table.cols-4, table.cols-5) td::before { content: attr(data-label); font: 600 10.5px/1.6 var(--mono); text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-3); }
  .prose :is(table.cols-3, table.cols-4, table.cols-5) td:first-child { display: block; font-weight: 800; padding: 0 0 6px; margin-bottom: 4px; border-bottom: 1px dashed var(--rule); }
  .prose :is(table.cols-3, table.cols-4, table.cols-5) td:first-child::before { content: none; }
  .prose :is(table.cols-3, table.cols-4, table.cols-5) td:has(> .cv:empty) { display: none; }
  .prose table td code { white-space: normal; overflow-wrap: anywhere; }
}