/* ── tokens ───────────────────────────────────────────────────────── */
.cbc-po-demo{
  --bg: #0b101e;
  --paper: #141d2f;
  --ink: #e8edf5;
  --ink-2: #a9b7d2;
  --ink-3: #7f90ab;
  --rule: #2f3e59;
  --rule-2: #27374f;
  --accent: #6a89ff;
  --accent-hover: #4e73ff;
  --accent-soft: #1d2a47;
  --ok: #34d17b;
  --ok-soft: #1b3f29;
  --bad: #ff6f6f;
  --bad-soft: #3a1d20;
  --warn: #ffd166;
  --warn-soft: #3d3120;
  --mono: 'IBM Plex Mono', ui-monospace, Menlo, Consolas, monospace;
  --sans: 'IBM Plex Sans', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --cm-gutter: #111827;
  --cm-gutter-border: #263a5c;
}

.cbc-po-demo, .cbc-po-demo *{ box-sizing: border-box; }
.cbc-po-demo{ margin: 0; padding: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); }
.cbc-po-demo{ font-size: 14px; line-height: 1.4; }

.cbc-po-demo .boot{ padding: 60px; font-family: var(--mono); color: var(--ink-2); }

/* ── header ───────────────────────────────────────────────────────── */
.cbc-po-demo .app{ min-height: 100vh; padding: 24px; max-width: 1640px; margin: 0 auto; }

.cbc-po-demo .hdr{
  display: flex; justify-content: space-between; align-items: flex-end;
  border-bottom: 1px solid var(--ink); padding-bottom: 14px; margin-bottom: 20px;
  gap: 24px;
}
.cbc-po-demo .hdr-title{ font-family: var(--mono); font-size: 12px; letter-spacing: 0.18em; color: var(--ink); }
.cbc-po-demo .hdr-sub{ color: var(--ink-2); margin-top: 6px; max-width: 720px; }
.cbc-po-demo .hdr-r{ display: flex; gap: 6px; }

.cbc-po-demo .hb{ 
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em;
  background: var(--paper); border: 1px solid var(--rule);
  padding: 6px 10px; cursor: pointer; color: var(--ink);
}
.cbc-po-demo .hb:hover{ border-color: var(--ink); }
.cbc-po-demo .hb-primary{ background: var(--accent); color: white; border-color: var(--accent); }
.cbc-po-demo .hb-primary:hover{ background: var(--accent-hover); }
.cbc-po-demo .hb:disabled{ opacity: 0.4; cursor: not-allowed; }

/* ── board grid ───────────────────────────────────────────────────── */
.cbc-po-demo .board{
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-areas:
    "diagram diagram"
    "bytes bytes"
    "guide log"
    "py py";
  gap: 18px;
}
.cbc-po-demo .diagram{ grid-area: diagram; }
.cbc-po-demo .bytes-section{ grid-area: bytes; }
.cbc-po-demo .guide{ grid-area: guide; }
.cbc-po-demo .log-section{ grid-area: log; }
.cbc-po-demo .py-section{ grid-area: py; }

/* ── diagram ──────────────────────────────────────────────────────── */
.cbc-po-demo .diagram{
  background: var(--paper); border: 1px solid var(--rule); padding: 12px 16px;
}
.cbc-po-demo .diagram svg{ width: 100%; height: 420px; }
.cbc-po-demo .d-label{ font-family: var(--mono); font-size: 11px; fill: var(--ink-2); }
.cbc-po-demo .d-tag{ font-family: var(--mono); font-size: 10px; fill: var(--ink-3); }
.cbc-po-demo .d-meta{ font-family: var(--mono); font-size: 10px; fill: var(--ink-3); }
.cbc-po-demo .d-line{ stroke: var(--ink); stroke-width: 1.2; fill: none; }
.cbc-po-demo .d-arrow{ fill: var(--ink); }
.cbc-po-demo .d-box{ fill: var(--paper); stroke: var(--ink); stroke-width: 1.2; }
.cbc-po-demo .d-box-text{ font-family: var(--mono); font-size: 13px; text-anchor: middle; fill: var(--ink); }
.cbc-po-demo .d-box-sub{ font-family: var(--mono); font-size: 10px; text-anchor: middle; fill: var(--ink-3); }
.cbc-po-demo .d-xor{ fill: var(--paper); stroke: var(--ink); stroke-width: 1.2; }
.cbc-po-demo .d-xor-text{ font-family: var(--mono); font-size: 14px; text-anchor: middle; fill: var(--ink); }
.cbc-po-demo .d-oracle{ fill: var(--paper); stroke: var(--ink); stroke-width: 1.2; }
.cbc-po-demo .d-oracle.ok{ fill: var(--ok-soft); stroke: var(--ok); }
.cbc-po-demo .d-oracle.querying{ fill: var(--warn-soft); stroke: var(--warn); }
.cbc-po-demo .d-oracle-text{ font-family: var(--mono); font-size: 11px; text-anchor: middle; fill: var(--ink); letter-spacing: 0.04em; }
.cbc-po-demo .d-valid{ font-family: var(--mono); font-size: 13px; fill: var(--bad); letter-spacing: 0.04em; font-weight: 600; }
.cbc-po-demo .d-valid.ok{ fill: var(--ok); }
.cbc-po-demo .d-valid.querying{ fill: var(--warn); }

.cbc-po-demo .d-strip{ fill: var(--paper); stroke: var(--ink); stroke-width: 1; }
.cbc-po-demo .d-strip-div{ stroke: var(--rule); stroke-width: 0.6; }
.cbc-po-demo .d-strip-byte{ font-family: var(--mono); font-size: 9.5px; text-anchor: middle; fill: var(--ink); }
.cbc-po-demo .d-strip-label{ font-family: var(--mono); font-size: 11px; fill: var(--ink); letter-spacing: 0.04em; }
.cbc-po-demo .d-strip-sub{ font-family: var(--mono); font-size: 10px; fill: var(--ink-3); }

/* ── byte rows ────────────────────────────────────────────────────── */
.cbc-po-demo .bytes-section{ background: var(--paper); border: 1px solid var(--rule); padding: 14px 18px; }

/* Framed panel + valid/invalid glow */
.cbc-po-demo .bytes-frame{
  position: relative;
  border: 2px solid var(--rule);
  transition: border-color 200ms, box-shadow 200ms;
  padding-bottom: 64px; /* room for status badge */
}
.cbc-po-demo .bytes-frame.is-valid{
  border-color: var(--ok);
  box-shadow: 0 0 0 3px rgba(52,209,123,0.22), 0 0 30px rgba(52,209,123,0.28);
}
.cbc-po-demo .bytes-frame.is-invalid{
  border-color: var(--bad);
  box-shadow: 0 0 0 3px rgba(255,111,111,0.18), 0 0 26px rgba(255,111,111,0.24);
}
.cbc-po-demo .bytes-frame.is-querying{ opacity: 0.85; }

.cbc-po-demo .oracle-status{
  position: absolute; left: 18px; right: 18px; bottom: 14px;
  display: flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.12em;
  text-transform: uppercase; padding: 8px 12px;
  border-radius: 2px;
}
.cbc-po-demo .oracle-status .dot{
  width: 10px; height: 10px; border-radius: 50%;
  display: inline-block;
}
.cbc-po-demo .oracle-status.ok{
  color: var(--ok); background: rgba(52,209,123,0.10);
  border: 1px solid rgba(52,209,123,0.45);
}
.cbc-po-demo .oracle-status.ok .dot{ background: var(--ok); box-shadow: 0 0 12px var(--ok); }
.cbc-po-demo .oracle-status.bad{
  color: var(--bad); background: rgba(255,111,111,0.10);
  border: 1px solid rgba(255,111,111,0.45);
}
.cbc-po-demo .oracle-status.bad .dot{ background: var(--bad); box-shadow: 0 0 10px var(--bad); }
.cbc-po-demo .oracle-status .qc{ margin-left: auto; color: var(--ink-3); font-size: 11px; letter-spacing: 0.08em; text-transform: none; }
.cbc-po-demo .row{ display: grid; grid-template-columns: 180px 1fr; gap: 16px; padding: 10px 0; border-bottom: 1px dashed var(--rule-2); }
.cbc-po-demo .row:last-child{ border-bottom: none; }
.cbc-po-demo .row-label{ font-family: var(--mono); font-size: 11px; padding-top: 4px; }
.cbc-po-demo .rl-name{ color: var(--ink); letter-spacing: 0.06em; }
.cbc-po-demo .rl-sub{ color: var(--ink-3); margin-top: 2px; font-size: 10px; }

.cbc-po-demo .row-bytes{
  display: grid; grid-template-columns: repeat(16, 1fr); gap: 4px;
}
.cbc-po-demo .row-bytes-cells{ gap: 4px; }

.cbc-po-demo .cell{
  font-family: var(--mono); font-size: 13px; text-align: center;
  background: var(--bg); border: 1px solid var(--rule);
  padding: 8px 0; color: var(--ink);
  letter-spacing: 0.04em;
}
.cbc-po-demo .cell-hl{ outline: 2px solid var(--accent); outline-offset: -2px; }
.cbc-po-demo .cell-dim{ color: var(--ink-3); background: var(--bg); }
.cbc-po-demo .cell-ok{ background: var(--ok-soft); border-color: var(--ok); color: var(--ok); }
.cbc-po-demo .cell-rec{ display: flex; flex-direction: column; gap: 2px; padding: 6px 0; }
.cbc-po-demo .cell-rec .cell-hex{ font-size: 12px; font-weight: 600; }
.cbc-po-demo .cell-rec .cell-asc{ font-size: 10px; color: var(--ink-2); }
.cbc-po-demo .cell-rec.cell-ok .cell-asc{ color: var(--ok); }

.cbc-po-demo .byte-guess{ position: relative; }
.cbc-po-demo .byte-guess.byte-known{ background: var(--warn-soft); border-color: var(--warn); }
.cbc-po-demo .byte-guess .byte-value{ display: flex; flex-direction: column; gap: 2px; padding: 4px 0; cursor: text; }
.cbc-po-demo .byte-guess .byte-value .cell-hex{ font-size: 12px; }
.cbc-po-demo .byte-guess .byte-value .cell-asc{ font-size: 10px; color: var(--ink-2); }

/* Final "your guess" row — click-to-record cells */
.cbc-po-demo .byte-final{ position: relative; cursor: pointer; transition: background 80ms; }
.cbc-po-demo .byte-final:hover:not(.byte-dim){ background: rgba(67,209,123,0.10); }
.cbc-po-demo .byte-final.byte-known{ background: var(--ok-soft); border-color: var(--ok); }
.cbc-po-demo .byte-final.byte-correct{ background: rgba(52,209,123,0.22); border-color: var(--ok); }
.cbc-po-demo .byte-final.byte-dim{ cursor: not-allowed; }
.cbc-po-demo .byte-final .byte-value{ display: flex; flex-direction: column; gap: 2px; padding: 4px 0; }
.cbc-po-demo .byte-final .byte-value .cell-hex{ font-size: 12px; }
.cbc-po-demo .byte-final .byte-value .cell-asc{ font-size: 10px; color: var(--ink-2); }
.cbc-po-demo .byte-real{
  font-family: var(--mono); font-size: 9px; color: var(--accent);
  text-align: center; padding: 1px 0;
  border-top: 1px dashed var(--rule-2);
}

.cbc-po-demo .row-blurred .row-bytes{ filter: blur(5px); transition: filter .12s; }
.cbc-po-demo .row-blurred:hover .row-bytes{ filter: blur(0); }

/* D(C) phantom XOR row */
.cbc-po-demo .row-xor-rule{ padding: 4px 0 6px 0; border-bottom: none; }
.cbc-po-demo .row-label-xor{
  display: flex; align-items: flex-start; gap: 10px;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 6px;
}
.cbc-po-demo .xor-sign-inline{
  font-family: var(--mono); font-size: 22px; line-height: 1;
  color: var(--ink); padding-top: 2px;
}
.cbc-po-demo .xor-name{ display: flex; flex-direction: column; gap: 2px; }
.cbc-po-demo .row-bytes-xor{ /* empty — bytes column is intentionally blank */ }

/* P (your guess) — single-line hex (ascii) */
.cbc-po-demo .byte-value-final{ display: flex; align-items: center; justify-content: center; padding: 8px 0; }
.cbc-po-demo .byte-value-final .cell-hex{ font-size: 12px; font-weight: 600; }
.cbc-po-demo .byte-value-final .cell-paren{ color: var(--ink-2); font-weight: 400; margin-left: 2px; }

.cbc-po-demo .hb-warn{ background: var(--warn-soft); border-color: var(--warn); color: var(--warn); }

/* ── byte cells (interactive IV') ─────────────────────────────────── */
.cbc-po-demo .byte{
  background: var(--bg); border: 1px solid var(--rule);
  display: flex; flex-direction: column; align-items: stretch;
  font-family: var(--mono); padding-bottom: 4px;
}
.cbc-po-demo .byte-label{ font-size: 9px; color: var(--ink-3); text-align: center; padding: 3px 0 1px; letter-spacing: 0.04em; border-bottom: 1px solid var(--rule-2); }
.cbc-po-demo .byte-value{ text-align: center; padding: 8px 0 6px; font-size: 14px; cursor: text; }
.cbc-po-demo .byte-input{
  width: 36px; text-align: center; font-family: var(--mono); font-size: 14px;
  border: 1px solid var(--accent); background: var(--cm-gutter); color: var(--ink); outline: none;
}
.cbc-po-demo .byte-controls{ display: flex; justify-content: center; gap: 2px; padding: 0 4px; }
.cbc-po-demo .byte-tooltip-wrap{
  position: relative;
  display: flex;
  flex: 1;
}
.cbc-po-demo .byte-tooltip-wrap .bi{
  width: 100%;
}
.cbc-po-demo .byte-tooltip-wrap .byte-tooltip{
  position: absolute;
  left: 50%;
  top: 120%;
  transform: translateX(-50%);
  z-index: 20;
  width: max-content;
  max-width: 240px;
  margin-top: 4px;
  padding: 5px 7px;
  border-radius: 4px;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--rule);
  box-shadow: 0 6px 20px rgba(0,0,0,.28);
  font-size: 10px;
  line-height: 1.35;
  white-space: normal;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 110ms ease;
}
.cbc-po-demo .byte-tooltip-wrap:hover .byte-tooltip,
.cbc-po-demo .byte-tooltip-wrap:focus-within .byte-tooltip{
  opacity: 1;
  visibility: visible;
}
.cbc-po-demo .bi{
  flex: 1; font-family: var(--mono); font-size: 10px;
  background: var(--paper); border: 1px solid var(--rule);
  cursor: pointer; padding: 3px 0; color: var(--ink-2);
}
.cbc-po-demo .bi:hover{ border-color: var(--ink); color: var(--ink); }
.cbc-po-demo .bi-brute{ color: var(--accent); border-color: var(--accent-soft); background: var(--accent-soft); }
.cbc-po-demo .bi-brute:hover{ background: var(--accent); color: white; }
.cbc-po-demo .byte-hl{ outline: 2px solid var(--accent); outline-offset: -2px; }
.cbc-po-demo .byte-dim{ opacity: 0.5; }
.cbc-po-demo .byte-busy{
  outline: 2px solid var(--warn); outline-offset: -2px;
  background: var(--warn-soft);
  animation: cbc-po-byte-pulse .3s linear infinite;
}
@keyframes cbc-po-byte-pulse{ 0%,100%{ background: var(--warn-soft);} 50%{ background: rgba(255,209,102,0.2);} }

/* ── guide ────────────────────────────────────────────────────────── */
.cbc-po-demo .guide, .cbc-po-demo .log-section{
  background: var(--paper); border: 1px solid var(--rule); padding: 14px 18px;
}
.cbc-po-demo .guide-hdr, .cbc-po-demo .log-hdr, .cbc-po-demo .py-title{
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em;
  color: var(--ink-2); margin-bottom: 12px; text-transform: uppercase;
}
.cbc-po-demo .guide-row{ display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.cbc-po-demo .guide-row label{ font-family: var(--mono); font-size: 11px; color: var(--ink-3); }
.cbc-po-demo .guide-target{ display: flex; align-items: center; gap: 6px; }
.cbc-po-demo .guide-tval{ font-family: var(--mono); font-size: 12px; padding: 4px 8px; background: var(--bg); border: 1px solid var(--rule); }
.cbc-po-demo .guide-steps{ font-size: 13px; color: var(--ink-2); padding-left: 18px; margin: 8px 0 14px; }
.cbc-po-demo .guide-steps li{ margin-bottom: 6px; line-height: 1.55; }
.cbc-po-demo .guide-actions{ display: flex; gap: 8px; }

/* ── log ──────────────────────────────────────────────────────────── */
.cbc-po-demo .log-body{
  font-family: var(--mono); font-size: 11px; color: var(--ink);
  background: var(--bg); border: 1px solid var(--rule);
  height: 200px; overflow-y: auto; padding: 8px 10px;
}
.cbc-po-demo .log-empty{ color: var(--ink-3); font-style: italic; }
.cbc-po-demo .log-line{ white-space: pre-wrap; padding: 1px 0; }

/* ── python panel ─────────────────────────────────────────────────── */
.cbc-po-demo .py{ background: var(--paper); border: 1px solid var(--rule); padding: 14px 18px; }
.cbc-po-demo .py-hdr{
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 8px;
}
.cbc-po-demo .py-status{
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-3);
  line-height: 1.2;
  padding-left: 2px;
}
.cbc-po-demo .py-tabbar{
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 10px;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0;
}
.cbc-po-demo .py-tabs{
  display: inline-flex;
  align-items: flex-end;
  gap: 1px;
}
.cbc-po-demo .py-tab{
  position: relative;
  appearance: none;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  background: transparent;
  color: var(--ink-3);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.01em;
  line-height: 1.2;
  margin-right: 2px;
  padding: 8px 12px 7px;
  height: 30px;
  min-width: 84px;
  cursor: pointer;
  transition: color 120ms ease, background-color 120ms ease, border-color 120ms ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.cbc-po-demo .py-tab:hover{
  color: var(--ink);
  background: rgba(255,255,255,0.045);
}
.cbc-po-demo .py-tab:focus-visible{
  outline: 1px solid var(--accent);
  outline-offset: -2px;
}
.cbc-po-demo .py-tab-active{
  color: var(--ink);
  border-color: var(--rule);
  background: var(--paper);
  border-bottom-color: var(--paper);
  z-index: 1;
}
.cbc-po-demo .py-tab-active::after{
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--paper);
}
.cbc-po-demo .py-tabbar:focus-within{
  outline: 1px solid transparent;
}
.cbc-po-demo .py-tabbar .py-tab-active{
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), inset 0 -1px 0 rgba(0,0,0,0.15);
}
.cbc-po-demo .py-actions{
  margin-left: auto;
  display: flex;
  gap: 6px;
}
.cbc-po-demo .py-body{ display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.cbc-po-demo .py-editor{
  font-family: var(--mono); font-size: 12px; line-height: 1.55;
  background: var(--bg); color: var(--ink);
  border: 1px solid var(--rule); padding: 10px;
  width: 100%; height: 360px; resize: vertical; outline: none;
  tab-size: 4;
}
.cbc-po-demo .py-editor:focus{ border-color: var(--accent); }
.cbc-po-demo .py-editor-wrap.CodeMirror{
  height: 360px;
  border: 1px solid var(--rule);
  font-family: var(--mono); font-size: 12px; line-height: 1.55;
  background: var(--bg);
}
.cbc-po-demo .py-editor-wrap.CodeMirror-focused{
  border-color: var(--accent);
}
.cbc-po-demo .py-editor-wrap .CodeMirror-gutters{
  background: var(--cm-gutter);
  border-right: 1px solid var(--cm-gutter-border);
}
.cbc-po-demo .py-editor-wrap .CodeMirror pre{
  tab-size: 4;
}
.cbc-po-demo .py-editor-wrap .CodeMirror-hints{
  z-index: 10;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 4px;
  color: var(--ink);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}
.cbc-po-demo .py-editor-wrap .CodeMirror-hint{
  padding: 4px 8px;
}
.cbc-po-demo .py-editor-wrap .CodeMirror-hint-active{
  background: var(--accent);
  color: var(--paper);
}
.cbc-po-demo .py-editor-cm6{
  height: 360px;
  border: 1px solid var(--rule);
  overflow: hidden;
}
.cbc-po-demo .py-editor-monaco{
  height: 360px;
  min-height: 360px;
  border: 1px solid var(--rule);
}
.cbc-po-demo .py-editor-cm6:focus-within{
  border-color: var(--accent);
}
.cbc-po-demo .py-editor-monaco .monaco-editor{
  height: 100%;
  width: 100%;
}
.cbc-po-demo .py-editor-cm6 .cm-editor{
  height: 100%;
}
.cbc-po-demo .py-editor-cm6 .cm-tooltip-autocomplete{
  font-family: var(--mono);
  font-size: 12px;
}
.cbc-po-demo .py-out{
  font-family: var(--mono); font-size: 12px; line-height: 1.55;
  background: var(--cm-gutter); color: var(--ink);
  border: 1px solid var(--ink); padding: 10px;
  height: 360px; overflow: auto; margin: 0; white-space: pre-wrap;
}
.cbc-po-demo .py-api{ font-family: var(--mono); font-size: 10px; color: var(--ink-3); margin-top: 8px; }
.cbc-po-demo .py-api code{ background: var(--bg); padding: 1px 4px; border: 1px solid var(--rule); margin: 0 1px; color: var(--ink-2); }
.cbc-po-demo .py-api-label{ font-size: 10px; color: var(--ink-2); text-transform: uppercase; letter-spacing: 0.06em; margin-right: 6px; }
.cbc-po-demo .py-api-item{
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 3px;
}
.cbc-po-demo .py-api-item .py-api-tooltip{
  position: absolute;
  left: 0;
  top: 120%;
  z-index: 20;
  width: max-content;
  max-width: 280px;
  margin-top: 4px;
  padding: 5px 7px;
  border-radius: 4px;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--rule);
  box-shadow: 0 6px 20px rgba(0,0,0,.28);
  font-size: 10px;
  line-height: 1.35;
  white-space: normal;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 110ms ease;
}
.cbc-po-demo .py-api-item:hover .py-api-tooltip,
.cbc-po-demo .py-api-item:focus-within .py-api-tooltip{ opacity: 1; visibility: visible; }
.cbc-po-demo .py-api-code,
.cbc-po-demo .py-api-help{
  cursor: default;
}
.cbc-po-demo .py-api-help{
  display: inline-flex; width: 14px; height: 14px;
  border-radius: 50%;
  align-items: center; justify-content: center;
  font-size: 10px; line-height: 1;
  color: var(--ink-3);
  border: 1px solid var(--rule-2);
  background: rgba(255,255,255,.05);
  user-select: none;
}