/* Pearl Policy — blueprint cartographer theme.
 * Deep blueprint navy, drafting-grid background, chalk-white mono
 * annotations, tabular numerals. Distinct from Hedge (teal/chartreuse),
 * Paywall (plum/gold), Predict (black/amber). */
:root {
  --bp-0: #060f22;   /* deepest navy */
  --bp-1: #0a1830;   /* panel navy */
  --bp-2: #0e2140;   /* raised navy */
  --bp-3: #14305a;   /* line navy */
  --chalk: #eef3ff;  /* chalk white */
  --chalk-dim: #a9bcd9;
  --chalk-faint: #a3afc4;
  --blue: #8fc1ff;   /* drafting blue accent */
  --blue-dim: #5d8fd6;
  --blue-glow: rgba(143, 193, 255, 0.12);
  --warn: #ffc857;   /* drafting-pencil amber (warnings only) */
  --good: #7ce8a5;
  --bad: #ff7d7d;
  --mono: "SF Mono", ui-monospace, Menlo, Consolas, "Liberation Mono", monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  background-color: var(--bp-0);
  /* drafting grid: fine 1px lines every 24px, bold lines every 120px */
  background-image:
    linear-gradient(rgba(143,193,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143,193,255,0.05) 1px, transparent 1px),
    linear-gradient(rgba(143,193,255,0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143,193,255,0.09) 1px, transparent 1px);
  background-size: 24px 24px, 24px 24px, 120px 120px, 120px 120px;
  color: var(--chalk);
  line-height: 1.55;
}
h2 { color: var(--blue); font-size: 1.35rem; margin: 0 0 0.5rem; letter-spacing: 0.02em; }
h3 { color: var(--chalk); font-size: 1.05rem; margin: 1.4rem 0 0.5rem; }
h4 { color: var(--chalk-dim); font-size: 0.85rem; margin: 1rem 0 0.4rem; text-transform: uppercase; letter-spacing: 0.12em; }
#a-out h3.keep-h4 { color: var(--chalk-dim); font-size: 0.85rem; margin: 1rem 0 0.4rem; text-transform: uppercase; letter-spacing: 0.12em; }
.lede { color: var(--chalk-dim); max-width: 72ch; }
.lede strong, li strong { color: var(--chalk); }
a { color: var(--blue); }
code { font-family: var(--mono); }

/* top bar */
.topbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px dashed var(--bp-3);
  background: rgba(6, 15, 34, 0.85);
}
.brand { display: flex; align-items: center; gap: 0.9rem; }
.seal { width: 52px; height: 52px; }
.seal .node { fill: none; stroke: var(--blue); stroke-width: 2; }
.seal .leaf { fill: rgba(143,193,255,0.12); stroke: var(--blue); stroke-width: 1.5; }
.seal .wire { stroke: var(--blue-dim); stroke-width: 1.5; stroke-dasharray: 4 2; }
.brand h1 { margin: 0; font-size: 1.6rem; color: var(--chalk); letter-spacing: 0.04em; }
.tagline { margin: 0.15rem 0 0; color: var(--chalk-dim); font-size: 0.85rem; }
.steps { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-left: auto; }
.steps button {
  font-family: var(--mono); font-size: 0.8rem; color: var(--chalk-dim);
  background: transparent; border: 1px solid var(--bp-3); border-radius: 6px;
  padding: 0.5rem 0.85rem; cursor: pointer;
}
.steps button:hover { border-color: var(--blue-dim); color: var(--chalk); }
.steps button.active {
  background: var(--blue-glow); color: var(--blue);
  border-color: var(--blue-dim);
  box-shadow: inset 0 0 0 1px var(--blue-dim);
}

.margin-strip {
  border-bottom: 1px dashed var(--bp-3);
  padding: 0.4rem 1.5rem;
  font-size: 0.72rem; letter-spacing: 0.18em; color: var(--chalk-faint);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

main { max-width: 1080px; margin: 0 auto; padding: 1.5rem; }
.panel {
  display: none;
  background: rgba(10, 24, 48, 0.92);
  border: 1px solid var(--bp-3);
  border-radius: 10px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 0 0 1px rgba(143,193,255,0.04), 0 12px 40px rgba(0,0,0,0.45);
}
.panel.active { display: block; }
.panel.limits { display: block; border-style: dashed; border-color: var(--blue-dim); }
.limits h2 { color: var(--blue); }
.limits li { margin-bottom: 0.5rem; color: var(--chalk-dim); overflow-wrap: anywhere; }
.limits li strong { color: var(--chalk); }

.form-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.9rem; margin: 1rem 0;
}
label { display: flex; flex-direction: column; gap: 0.35rem; font-size: 0.88rem; color: var(--chalk-dim); }
label.wide { grid-column: 1 / -1; }
input, select, textarea {
  font-family: var(--mono); font-size: 0.88rem;
  background: var(--bp-0); border: 1px solid var(--bp-3); color: var(--chalk);
  border-radius: 6px; padding: 0.6rem 0.7rem; width: 100%;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--blue-dim); box-shadow: 0 0 0 2px var(--blue-glow); }
textarea { resize: vertical; }
.hint { color: var(--chalk-faint); font-size: 0.82rem; }
.hint-inline { color: var(--chalk-faint); font-size: 0.78rem; font-weight: normal; letter-spacing: 0; text-transform: none; }

.radio-row { display: flex; flex-direction: column; gap: 0.5rem; margin: 0.8rem 0; }
.radio { flex-direction: row !important; align-items: flex-start; gap: 0.6rem; cursor: pointer;
  border: 1px solid var(--bp-3); border-radius: 8px; padding: 0.7rem 0.9rem; }
.radio input { width: auto; margin-top: 0.2rem; accent-color: var(--blue); }
.radio span { font-size: 0.86rem; }
.radio strong { color: var(--blue); }
.radio code { color: var(--blue); font-size: 0.8rem; }

.row { display: flex; gap: 0.6rem; flex-wrap: wrap; align-items: center; margin: 0.9rem 0; }
button {
  font-family: var(--mono); font-size: 0.88rem; cursor: pointer;
  background: var(--bp-2); color: var(--chalk);
  border: 1px solid var(--bp-3); border-radius: 6px; padding: 0.6rem 1.1rem;
}
button:hover { border-color: var(--blue-dim); }
button.primary { background: var(--blue); color: #06122a; border-color: var(--blue); font-weight: bold; }
button.primary:hover { background: #a9d0ff; }
button.ghost { background: transparent; color: var(--chalk-dim); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

.err { background: rgba(255,125,125,0.1); border: 1px solid var(--bad); color: #ffb3b3;
  border-radius: 6px; padding: 0.7rem 0.9rem; font-size: 0.88rem; }
.ok { background: rgba(124,232,165,0.08); border: 1px solid var(--good); color: var(--good);
  border-radius: 6px; padding: 0.7rem 0.9rem; font-size: 0.88rem; }
.note { background: var(--bp-2); border: 1px dashed var(--bp-3);
  border-radius: 6px; padding: 0.8rem 1rem; margin: 0.8rem 0; font-size: 0.88rem; color: var(--chalk-dim); }
.note code { word-break: break-all; color: var(--blue); }

.addr code { word-break: break-all; color: var(--blue); font-size: 0.95rem; }
.mono { font-family: var(--mono); }
.big { font-size: 1.05rem !important; }

.review { display: grid; grid-template-columns: auto 1fr; gap: 0.35rem 1rem; margin: 0.8rem 0; }
.review dt { color: var(--chalk-faint); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; }
.review dd { margin: 0; font-family: var(--mono); font-size: 0.85rem; word-break: break-all; color: var(--chalk); }

.asm { background: var(--bp-0); border: 1px solid var(--bp-3); border-radius: 6px;
  padding: 0.8rem 1rem; color: var(--blue); overflow-x: auto; white-space: pre-wrap;
  word-break: break-all; font-size: 0.82rem; }
.qr canvas, .qr img { border: 6px solid #fff; border-radius: 6px; margin-top: 0.6rem; }

/* leaf cards */
.leaf-card {
  border: 1px solid var(--bp-3); border-left: 3px solid var(--blue-dim);
  border-radius: 8px; padding: 1rem 1.1rem; margin: 0.8rem 0; background: rgba(14, 33, 64, 0.5);
}
.leaf-card.expert { border-left-color: var(--warn); }
.leaf-card h4 { margin-top: 0; display: flex; align-items: center; justify-content: space-between; }
.leaf-card .form-grid { margin: 0.6rem 0 0; }
.expert-warn {
  background: rgba(255,200,87,0.08); border: 1px dashed var(--warn); color: var(--warn);
  border-radius: 6px; padding: 0.6rem 0.8rem; font-size: 0.82rem; margin-top: 0.6rem;
}

/* tree visualization */
.treebox { background: var(--bp-0); border: 1px solid var(--bp-3); border-radius: 8px;
  padding: 1rem; overflow-x: auto; margin: 0.8rem 0; }
.treebox svg { display: block; min-width: 520px; }
.treebox .tnode { fill: rgba(143,193,255,0.1); stroke: var(--blue-dim); }
.treebox .troot { fill: rgba(143,193,255,0.22); stroke: var(--blue); stroke-width: 2; }
.treebox .twire { stroke: var(--blue-dim); stroke-width: 1.2; }
.treebox .tlabel { fill: var(--chalk); font-family: var(--mono); font-size: 11px; }
.treebox .thash { fill: var(--chalk-faint); font-family: var(--mono); font-size: 9px; }

/* leaf table on Address tab */
.leaf-block { border: 1px solid var(--bp-3); border-radius: 8px; padding: 1rem; margin: 0.8rem 0; }
.leaf-block h4 { margin-top: 0; color: var(--blue); }
.kv { display: grid; grid-template-columns: 130px 1fr; gap: 0.3rem 0.8rem; font-size: 0.82rem; margin: 0.5rem 0; }
.kv dt { color: var(--chalk-faint); text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.72rem; }
.kv dd { margin: 0; word-break: break-all; color: var(--chalk); }
.badge-ok { color: var(--good); border: 1px solid var(--good); border-radius: 4px; padding: 0.05rem 0.4rem; font-size: 0.75rem; }
.badge-bad { color: var(--bad); border: 1px solid var(--bad); border-radius: 4px; padding: 0.05rem 0.4rem; font-size: 0.75rem; }

/* verifier verdict */
.verdict { border-radius: 8px; padding: 1rem 1.2rem; margin: 0.8rem 0; font-size: 1rem; }
.verdict.proven { background: rgba(124,232,165,0.1); border: 2px solid var(--good); color: var(--good); }
.verdict.notproven { background: rgba(255,125,125,0.1); border: 2px solid var(--bad); color: #ffb3b3; }
.verdict .big-verdict { font-size: 1.3rem; font-weight: bold; letter-spacing: 0.06em; display: block; margin-bottom: 0.4rem; }

/* learn */
.learn h3 { color: var(--blue); margin-top: 1.6rem; }
.learn ul { color: var(--chalk-dim); }
.learn li { margin-bottom: 0.55rem; max-width: 78ch; }
.learn code { color: var(--blue); font-size: 0.85em; }

footer { max-width: 1080px; margin: 0 auto; padding: 1.5rem; color: var(--chalk-faint); font-size: 0.85rem; }
footer code { color: var(--chalk-dim); word-break: break-all; }
.copy-btn { font-size: 0.75rem; padding: 0.3rem 0.6rem; }

@media (max-width: 640px) {
  main { padding: 1rem; }
  .panel { padding: 1rem; }
  .steps { margin-left: 0; }
}

/* Keyboard focus: a visible ring in this app's accent on every interactive element (fleet focus-visible pass). */
:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

/* Skip link: the first Tab stop on the page — parked off-screen until keyboard focus reveals it (fleet skip-link pass). */
.skip-link { position: absolute; left: 12px; top: -64px; z-index: 1000; padding: 10px 16px; border: 2px solid var(--blue); border-radius: 8px; background: #0b0e14; color: var(--blue); font-weight: 700; text-decoration: none; transition: top .15s ease; }
.skip-link:focus-visible { top: 12px; }
main:focus { outline: none; }

/* Reduced motion: when the OS asks for reduced motion, animations and transitions finish near-instantly and scrolling is not smoothed (fleet reduced-motion pass). Near-zero durations — not animation: none — so fade-ins still land on their end state and no content can be stranded invisible. */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

/* Touch targets (fleet WCAG 2.5.8 pass): native checkboxes/radios measured 13-18px in the fleet probe — size them to the 24px minimum. */
input[type="checkbox"], input[type="radio"] { width: 24px; height: 24px; flex: none; }