/* ════════════════════════════════════════════════════════════════════
   merkle-anchor.css — Shared Chain-of-Custody / Merkle / anchor component
   ────────────────────────────────────────────────────────────────────
   Centralized, reusable across all deploy/sites/ surfaces.
   Self-contained: no CDN, no web fonts required. Reads host CSS vars
   when present (--navy / --gold / --crimson / --paper-card / etc.) and
   falls back to scoped defaults so it renders standalone too.

   Recovered + centralized from the retrofuture main-hub Merkle explorer
   (git fd6d5c4d8 sweep). Reusable mount: see merkle-anchor.js.
   ════════════════════════════════════════════════════════════════════ */

.mrk-root{
  /* Token bridge: prefer host theme vars, fall back to a neutral set */
  --mrk-bg:        var(--paper-card,#fffdf8);
  --mrk-surface:   var(--paper-2,#faf6ee);
  --mrk-ink:       var(--ink,#26221c);
  --mrk-ink-soft:  var(--ink-soft,#5b5347);
  --mrk-muted:     var(--ink-mute,#8a8072);
  --mrk-rule:      var(--rule-dark,#cfc6b1);
  --mrk-accent:    var(--gold,#b8860b);
  --mrk-accent-2:  var(--navy-muted,#3a6298);
  --mrk-ok:        #1f7a4d;
  --mrk-warn:      var(--gold,#b8860b);
  --mrk-fail:      var(--crimson,#8b1a1a);
  --mrk-violet:    #6c4ab8;
  --mrk-mono:      var(--mono,'SFMono-Regular',Menlo,Consolas,monospace);
  --mrk-sans:      var(--sans,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif);
  --mrk-serif:     var(--serif,Georgia,'Times New Roman',serif);
  font-family:var(--mrk-sans);
  color:var(--mrk-ink);
}

/* ── Statsbar ──────────────────────────────────────────────────────── */
.mrk-statsbar{
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin:0 0 22px;
  padding:14px 18px;background:var(--mrk-surface);
  border:1px solid var(--mrk-rule);border-radius:10px;
}
.mrk-stat{display:flex;flex-direction:column;gap:2px}
.mrk-stat-big{font-family:var(--mrk-serif);font-size:1.7rem;font-weight:700;color:var(--mrk-ink);line-height:1}
.mrk-stat-big.gold{color:var(--mrk-accent)}
.mrk-stat-lbl{font-family:var(--mrk-mono);font-size:.62rem;color:var(--mrk-muted);letter-spacing:.05em;text-transform:uppercase}
.mrk-stat-sep{width:1px;height:34px;background:var(--mrk-rule);flex-shrink:0}
.mrk-stat-arrow{color:var(--mrk-rule);flex-shrink:0;display:flex;align-items:center}
.mrk-root-display{display:flex;flex-direction:column;gap:4px;flex:1;min-width:200px}
.mrk-root-lbl{font-family:var(--mrk-mono);font-size:.62rem;color:var(--mrk-muted);letter-spacing:.05em;text-transform:uppercase}
.mrk-root-hash{font-family:var(--mrk-mono);font-size:.68rem;font-weight:600;color:var(--mrk-ink);word-break:break-all;background:var(--mrk-bg);padding:4px 8px;border-radius:4px;border:1px solid var(--mrk-rule)}

/* ── anchor validation panel ────────────────────────────────────────── */
.mrk-anchor{
  display:flex;gap:14px;align-items:flex-start;flex-wrap:wrap;
  margin:0 0 24px;padding:16px 18px;border-radius:10px;
  background:var(--mrk-bg);border:1px solid var(--mrk-rule);
  border-left:4px solid var(--mrk-muted);
}
.mrk-anchor.ok{border-left-color:var(--mrk-ok);background:rgba(31,122,77,.05)}
.mrk-anchor.pending{border-left-color:var(--mrk-warn)}
.mrk-anchor.fail{border-left-color:var(--mrk-fail);background:rgba(139,26,26,.05)}
.mrk-anchor-icon{width:34px;height:34px;border-radius:8px;flex-shrink:0;display:flex;align-items:center;justify-content:center;background:var(--mrk-surface);font-size:1.1rem}
.mrk-anchor.ok .mrk-anchor-icon{color:var(--mrk-ok)}
.mrk-anchor.pending .mrk-anchor-icon{color:var(--mrk-warn)}
.mrk-anchor.fail .mrk-anchor-icon{color:var(--mrk-fail)}
.mrk-anchor-body{flex:1;min-width:220px;font-size:.85rem;line-height:1.55;color:var(--mrk-ink-soft)}
.mrk-anchor-title{font-family:var(--mrk-serif);font-size:1rem;font-weight:700;color:var(--mrk-ink);margin:0 0 4px;display:block}
.mrk-anchor-kv{font-family:var(--mrk-mono);font-size:.7rem;color:var(--mrk-ink-soft);word-break:break-all;margin-top:6px}
.mrk-anchor-kv b{color:var(--mrk-ink)}
.mrk-anchor-link{display:inline-flex;align-items:center;gap:5px;font-family:var(--mrk-mono);font-size:.72rem;font-weight:600;color:var(--mrk-accent-2);text-decoration:underline;text-underline-offset:2px;margin-top:6px}
.mrk-anchor-link:hover{opacity:.8}

/* ── Layout grid: tree + proof ─────────────────────────────────────── */
.mrk-grid{display:grid;grid-template-columns:1fr 320px;gap:16px;align-items:start;margin:0 0 24px}
.mrk-tree-panel{display:flex;flex-direction:column;gap:10px}
.mrk-tree-header{display:flex;align-items:center;justify-content:space-between;gap:10px}
.mrk-panel-title{font-family:var(--mrk-mono);font-size:.7rem;font-weight:600;color:var(--mrk-ink-soft);letter-spacing:.05em}
.mrk-panel-hint{font-family:var(--mrk-mono);font-size:.66rem;color:var(--mrk-muted);font-style:italic}
.mrk-canvas-wrap{border:1px solid var(--mrk-rule);border-radius:8px;overflow:hidden;background:var(--mrk-bg);cursor:pointer;position:relative}
.mrk-canvas-wrap canvas{display:block;width:100%;height:auto;touch-action:none}
.mrk-legend{display:flex;gap:14px;flex-wrap:wrap;margin-top:2px}
.mrk-leg-item{display:flex;align-items:center;gap:5px;font-family:var(--mrk-mono);font-size:.62rem;color:var(--mrk-muted)}
.mrk-leg-dot{width:9px;height:9px;border-radius:50%;flex-shrink:0}
.mrk-leg-leaf{background:var(--mrk-rule);border:1.5px solid var(--mrk-muted)}
.mrk-leg-selected{background:#e0a020;border:1.5px solid #b8860b}
.mrk-leg-path{background:var(--mrk-accent-2);border:1.5px solid var(--mrk-ok)}
.mrk-leg-root{background:var(--mrk-violet);border:1.5px solid #4a2f8a}

/* ── Proof panel ───────────────────────────────────────────────────── */
.mrk-proof-panel{background:var(--mrk-bg);border:1px solid var(--mrk-rule);border-radius:8px;overflow:hidden;min-height:380px;display:flex;flex-direction:column}
.mrk-proof-idle{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:28px 20px;text-align:center;color:var(--mrk-muted);font-size:.85rem;line-height:1.55}
.mrk-proof-content{flex:1;display:flex;flex-direction:column;overflow:hidden}
.mrk-proof-header{display:flex;align-items:center;justify-content:space-between;padding:11px 14px;border-bottom:1px solid var(--mrk-rule);background:var(--mrk-surface)}
.mrk-proof-title{font-family:var(--mrk-serif);font-size:.88rem;font-weight:700;color:var(--mrk-ink)}
.mrk-proof-leaf-id{font-family:var(--mrk-mono);font-size:.68rem;color:var(--mrk-accent);font-weight:600}
.mrk-proof-leaf-hash{padding:9px 14px;border-bottom:1px solid var(--mrk-rule);background:var(--mrk-surface)}
.mrk-hash-label{display:block;font-family:var(--mrk-mono);font-size:.58rem;color:var(--mrk-muted);letter-spacing:.06em;text-transform:uppercase;margin-bottom:4px}
.mrk-hash-val{font-family:var(--mrk-mono);font-size:.64rem;font-weight:600;color:var(--mrk-ink);word-break:break-all;display:block;padding:5px 8px;border-radius:4px;border:1px solid var(--mrk-rule);background:var(--mrk-bg)}
.mrk-path-list{overflow-y:auto;max-height:220px}
.mrk-path-step{display:grid;grid-template-columns:42px 38px 1fr;gap:5px 8px;align-items:start;padding:7px 14px;border-bottom:1px solid var(--mrk-rule)}
.mrk-step-level{font-family:var(--mrk-mono);font-size:.56rem;font-weight:700;color:var(--mrk-muted);padding:2px 5px;border-radius:3px;background:var(--mrk-surface);border:1px solid var(--mrk-rule);white-space:nowrap;text-align:center}
.mrk-step-pos{font-family:var(--mrk-mono);font-size:.56rem;color:var(--mrk-muted);padding:2px 5px;border-radius:3px;text-align:center}
.mrk-step-pos.left{color:var(--mrk-violet);background:rgba(108,74,184,.08);border:1px solid rgba(108,74,184,.2)}
.mrk-step-pos.right{color:var(--mrk-ok);background:rgba(31,122,77,.08);border:1px solid rgba(31,122,77,.2)}
.mrk-step-hash{font-family:var(--mrk-mono);font-size:.58rem;color:var(--mrk-muted);word-break:break-all;padding-top:2px}
.mrk-proof-root-row{padding:9px 14px;border-top:1px solid var(--mrk-rule);background:var(--mrk-surface)}
.mrk-hash-root{background:rgba(31,122,77,.07);border-color:rgba(31,122,77,.3)}
.mrk-verify-bar{padding:9px 14px;border-top:1px solid var(--mrk-rule);display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.mrk-btn-verify{display:inline-flex;align-items:center;gap:6px;padding:7px 13px;border-radius:6px;background:var(--mrk-accent-2);color:#fff;font-size:.74rem;font-weight:700;border:none;cursor:pointer;font-family:var(--mrk-sans)}
.mrk-btn-verify:hover{opacity:.9}
.mrk-btn-verify:disabled{opacity:.45;cursor:not-allowed}
.mrk-verify-result{font-family:var(--mrk-mono);font-size:.68rem;font-weight:600}
.mrk-verify-result.ok{color:var(--mrk-ok)}
.mrk-verify-result.fail{color:var(--mrk-fail)}
.mrk-verify-result.running{color:var(--mrk-muted)}

/* ── Controls ──────────────────────────────────────────────────────── */
.mrk-controls{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:0 0 14px}
.mrk-btn{display:inline-flex;align-items:center;gap:5px;padding:7px 13px;border-radius:7px;background:var(--mrk-bg);color:var(--mrk-ink-soft);font-size:.78rem;font-weight:600;border:1.5px solid var(--mrk-rule);cursor:pointer;font-family:var(--mrk-mono)}
.mrk-btn:hover{border-color:var(--mrk-accent);color:var(--mrk-accent)}
.mrk-btn.primary{background:var(--mrk-accent-2);color:#fff;border-color:var(--mrk-accent-2)}
.mrk-btn.primary:hover{opacity:.9}

/* ── COC chain ledger ──────────────────────────────────────────────── */
.mrk-coc{margin:0 0 8px}
.mrk-coc-title{font-family:var(--mrk-mono);font-size:.7rem;font-weight:600;color:var(--mrk-ink-soft);letter-spacing:.05em;margin:0 0 10px;display:flex;align-items:center;gap:8px}
.mrk-coc-list{display:flex;flex-direction:column;gap:0;border:1px solid var(--mrk-rule);border-radius:8px;overflow:hidden;background:var(--mrk-bg)}
.mrk-coc-row{display:grid;grid-template-columns:30px 1fr;gap:0;border-bottom:1px solid var(--mrk-rule);position:relative}
.mrk-coc-row:last-child{border-bottom:none}
.mrk-coc-rail{position:relative;background:var(--mrk-surface);border-right:1px solid var(--mrk-rule)}
.mrk-coc-rail::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:2px;background:var(--mrk-rule);transform:translateX(-50%)}
.mrk-coc-row:first-child .mrk-coc-rail::before{top:50%}
.mrk-coc-row:last-child .mrk-coc-rail::before{bottom:50%}
.mrk-coc-node{position:absolute;left:50%;top:16px;width:11px;height:11px;border-radius:50%;background:var(--mrk-accent-2);border:2px solid var(--mrk-bg);transform:translateX(-50%);z-index:1}
.mrk-coc-row.genesis .mrk-coc-node{background:var(--mrk-violet)}
.mrk-coc-row.seal .mrk-coc-node{background:var(--mrk-ok)}
.mrk-coc-cell{padding:10px 14px;min-width:0}
.mrk-coc-head{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.mrk-coc-op{font-family:var(--mrk-mono);font-size:.74rem;font-weight:700;color:var(--mrk-ink)}
.mrk-coc-tag{font-family:var(--mrk-mono);font-size:.56rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:2px 7px;border-radius:4px;background:var(--mrk-surface);color:var(--mrk-muted);border:1px solid var(--mrk-rule)}
.mrk-coc-row.genesis .mrk-coc-tag{background:rgba(108,74,184,.1);color:var(--mrk-violet);border-color:rgba(108,74,184,.25)}
.mrk-coc-row.seal .mrk-coc-tag{background:rgba(31,122,77,.1);color:var(--mrk-ok);border-color:rgba(31,122,77,.25)}
.mrk-coc-id{font-family:var(--mrk-mono);font-size:.62rem;color:var(--mrk-muted);margin-left:auto}
.mrk-coc-file{font-family:var(--mrk-mono);font-size:.66rem;color:var(--mrk-ink-soft);margin:3px 0 0;word-break:break-all}
.mrk-coc-hashes{display:flex;flex-direction:column;gap:2px;margin-top:6px}
.mrk-coc-hashline{font-family:var(--mrk-mono);font-size:.6rem;color:var(--mrk-muted);word-break:break-all}
.mrk-coc-hashline b{color:var(--mrk-ink-soft);font-weight:600}
.mrk-coc-link{font-family:var(--mrk-mono);font-size:.55rem;color:var(--mrk-accent-2)}
.mrk-coc-more{text-align:center;padding:9px;font-family:var(--mrk-mono);font-size:.68rem;color:var(--mrk-accent-2);cursor:pointer;background:var(--mrk-surface);border:none;width:100%}
.mrk-coc-more:hover{text-decoration:underline}

/* ── Hover / tap tooltip on the canvas tree ───────────────────────────
   Anchored inside .mrk-canvas-wrap (position:relative). pointer-events:none
   so it never steals the hit-test target — dismissal on touch is decided
   by what the tap actually landed on underneath it. */
.mrk-tooltip{
  position:absolute;z-index:5;pointer-events:none;
  max-width:min(280px,calc(100% - 8px));
  background:var(--mrk-bg);border:1px solid var(--mrk-rule);border-radius:8px;
  box-shadow:0 6px 18px rgba(0,0,0,.14);
  padding:9px 11px;font-family:var(--mrk-sans);
}
.mrk-tt-title{
  display:flex;align-items:baseline;gap:6px;flex-wrap:wrap;
  font-family:var(--mrk-serif);font-size:.82rem;font-weight:700;color:var(--mrk-ink);
  margin:0 0 6px;
}
.mrk-tt-tag{
  font-family:var(--mrk-mono);font-size:.55rem;font-weight:700;letter-spacing:.05em;
  text-transform:uppercase;padding:1px 6px;border-radius:4px;
  background:var(--mrk-surface);color:var(--mrk-accent);border:1px solid var(--mrk-rule);
}
.mrk-tt-idx{margin-left:auto;font-family:var(--mrk-mono);font-size:.6rem;color:var(--mrk-muted)}
.mrk-tt-kv{
  display:grid;grid-template-columns:auto 1fr;gap:2px 8px;align-items:baseline;
  font-family:var(--mrk-mono);font-size:.64rem;color:var(--mrk-ink-soft);word-break:break-all;
  padding:2px 0;
}
.mrk-tt-kv b{
  color:var(--mrk-muted);font-weight:500;font-size:.58rem;
  text-transform:uppercase;letter-spacing:.05em;white-space:nowrap;
}
.mrk-tt-note{
  margin-top:6px;font-family:var(--mrk-mono);font-size:.62rem;color:var(--mrk-muted);
  border-top:1px solid var(--mrk-rule);padding-top:6px;
}
@media(prefers-reduced-motion:reduce){
  .mrk-tooltip{transition:none}
}

/* ── Responsive ────────────────────────────────────────────────────── */
@media(max-width:820px){
  .mrk-grid{grid-template-columns:1fr}
  .mrk-proof-panel{min-height:auto}
  .mrk-stat-sep{display:none}
}
@media(prefers-reduced-motion:reduce){
  .mrk-btn,.mrk-btn-verify{transition:none}
}