:root {
  --paper: #f2eee6;
  --card: #faf7f0;
  --ink: #221a12;
  --muted: #6b5f4c;
  --line: #ddd3c2;
  --accent: #a05a1a;
  --accent-soft: rgba(160, 90, 26, 0.12);
  --field: #a05a1a;
  --row-hi: #ece3d2;
  --land: #e7dfcc;
  --land-line: #b7a888;
  --topbar-h: 52px;
  --m-centroid: #8f4d0c;
  --m-midpoint: #005d91;
  --m-bbox: #00694e;
  --m-popcenter: #9c3a77;
  --m-dealul: #5c5240;
}
[data-theme="dark"] {
  --paper: #14100a;
  --card: #1f1610;
  --ink: #f2ece1;
  --muted: #b3a48e;
  --line: #352917;
  --accent: #e09a4e;
  --accent-soft: rgba(224, 154, 78, 0.14);
  --field: #e09a4e;
  --row-hi: #241b12;
  --land: #2a2115;
  --land-line: #5c4c33;
  --m-centroid: #f0a35c;
  --m-midpoint: #6cb8e8;
  --m-bbox: #4cc39a;
  --m-popcenter: #e08cbd;
  --m-dealul: #c9bb9f;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 1.05rem;
  line-height: 1.6;
}
main { max-width: 880px; margin: 0 auto; padding: 0 1.25rem 4rem; }
section { scroll-margin-top: calc(var(--topbar-h) + 12px); padding-top: 2.5rem; }
h1, h2 { font-family: "Fraunces", Georgia, serif; line-height: 1.12; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 5.2vw, 3.1rem); font-weight: 900; margin: 0.6rem 0 1.5rem; max-width: 16em; }
h2 { font-size: clamp(1.5rem, 3.6vw, 2rem); font-weight: 600; margin: 0 0 1rem; }
h3 { font-size: 1.1rem; margin: 1.6rem 0 0.4rem; }
p { margin: 0 0 1rem; max-width: 62ch; }
a { color: var(--field); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }

/* ---------- topbar (house pattern) ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 0.9rem;
  height: var(--topbar-h); padding: 0 1rem;
  background: var(--card); border-bottom: 1px solid var(--line);
  font-size: 0.95rem; white-space: nowrap;
}
.topbar .home { color: var(--ink); text-decoration: none; font-weight: 700; }
.topnav { display: flex; gap: 0.9rem; overflow-x: auto; scrollbar-width: none; }
.topnav::-webkit-scrollbar { display: none; }
.topnav a { color: var(--muted); text-decoration: none; }
.topnav a[aria-current="true"] { color: var(--ink); font-weight: 700; }
.topbar .spacer { flex: 1; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--line); background: transparent; color: var(--ink);
  cursor: pointer; flex: none;
}
.icon-btn svg { display: block; }
.icon-btn svg[hidden] { display: none; }

/* ---------- hero ---------- */
.hero { padding-top: 3rem; }
.dateline {
  font-family: "IBM Plex Mono", monospace; font-size: 0.8rem;
  color: var(--muted); margin: 0; max-width: none;
}
.ledger-answer {
  display: flex; gap: 1.5rem; align-items: center;
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 1.5rem 1.75rem; margin: 0 0 1.5rem;
}
.ledger-num {
  font-family: "Fraunces", serif; font-weight: 900;
  font-size: clamp(2.6rem, 7vw, 4rem); line-height: 1; color: var(--accent);
}
.ledger-main { font-size: 1.25rem; margin: 0 0 0.5rem; }
.ledger-sub { color: var(--muted); margin: 0; font-size: 1rem; }
.deck { font-size: 1.15rem; }
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1.25rem; }
.btn {
  display: inline-block; padding: 0.65rem 1.3rem; border-radius: 8px;
  background: var(--accent); color: #fff; text-decoration: none; font-weight: 700;
  border: 1px solid var(--accent); cursor: pointer; font-size: 1rem;
}
[data-theme="dark"] .btn { color: #181006; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
[data-theme="dark"] .btn-ghost { color: var(--ink); }
button.btn { font-family: inherit; }

/* ---------- definition picker ---------- */
.def-picker { display: flex; gap: 0.5rem; flex-wrap: wrap; margin: 0 0 1rem; }
.def-btn {
  min-height: 44px;
  padding: 0.5rem 1.1rem; border-radius: 999px; font-size: 0.95rem; font-weight: 700;
  border: 1px solid var(--line); background: var(--card); color: var(--muted);
  cursor: pointer; font-family: inherit;
}
.def-btn[aria-pressed="true"] { color: var(--ink); border-color: currentColor; }
.def-btn[data-def="all"][aria-pressed="true"] { color: var(--accent); }
.def-btn[data-def="centroid"][aria-pressed="true"] { color: var(--m-centroid); }
.def-btn[data-def="midpoint"][aria-pressed="true"] { color: var(--m-midpoint); }
.def-btn[data-def="bbox"][aria-pressed="true"] { color: var(--m-bbox); }
.def-btn[data-def="popcenter"][aria-pressed="true"] { color: var(--m-popcenter); }
.def-btn[data-def="dealul"][aria-pressed="true"] { color: var(--m-dealul); }
.def-btn[aria-pressed="true"] { border-width: 2px; padding: calc(0.5rem - 1px) calc(1.1rem - 1px); }
.def-btn svg { vertical-align: -1px; margin-right: 0.45rem; }
.def-btn[data-def="centroid"] svg :first-child { fill: var(--m-centroid); }
.def-btn[data-def="midpoint"] svg :first-child { fill: var(--m-midpoint); }
.def-btn[data-def="bbox"] svg :first-child { fill: var(--m-bbox); }
.def-btn[data-def="popcenter"] svg :first-child { fill: var(--m-popcenter); }
.def-btn[data-def="dealul"] svg :first-child { stroke: var(--m-dealul); }

/* ---------- maps ---------- */
.map-figure { margin: 0; }
.map-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 1rem; align-items: start; }
.map-cell { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 0.5rem; }
.map-cell svg { display: block; width: 100%; height: auto; }
.map-figure figcaption { color: var(--muted); font-size: 0.9rem; max-width: 62ch; margin-top: 0.75rem; }
.land { fill: var(--land); stroke: var(--land-line); stroke-width: 1; }
.county { fill: none; stroke: var(--land-line); stroke-width: 0.4; opacity: 0.55; }
.in-county { fill: var(--land); stroke: var(--land-line); stroke-width: 0.12; }
.in-uat { fill: none; stroke: var(--land-line); stroke-width: 0.06; opacity: 0.7; }
.in-jud {
  font-family: "IBM Plex Mono", monospace; font-size: 2.4px; font-weight: 600;
  fill: var(--muted); opacity: 0.8; text-anchor: middle;
  paint-order: stroke; stroke: var(--land); stroke-width: 0.5px;
}
.in-host { opacity: 0; stroke: none; transition: opacity 0.25s ease; }
.in-host[data-def="centroid"] { fill: var(--m-centroid); }
.in-host[data-def="midpoint"] { fill: var(--m-midpoint); }
.in-host[data-def="bbox"] { fill: var(--m-bbox); }
.in-host[data-def="popcenter"] { fill: var(--m-popcenter); }
.in-host[data-def="dealul"] { fill: var(--m-dealul); }
#map-figure[data-active="all"] .in-host { opacity: 0.16; }
#map-figure[data-active="centroid"] .in-host[data-def="centroid"],
#map-figure[data-active="midpoint"] .in-host[data-def="midpoint"],
#map-figure[data-active="bbox"] .in-host[data-def="bbox"],
#map-figure[data-active="popcenter"] .in-host[data-def="popcenter"],
#map-figure[data-active="dealul"] .in-host[data-def="dealul"] { opacity: 0.32; }

/* markers */
.mk { transition: opacity 0.25s ease; }
.mk circle, .mk rect, .mk path { paint-order: stroke; stroke: var(--card); }
.map-national .mk circle, .map-national .mk rect, .map-national .mk path { stroke-width: 1.6px; }
.map-inset .mk circle, .map-inset .mk rect, .map-inset .mk path { stroke-width: 0.35px; }
.mk-centroid circle { fill: var(--m-centroid); }
.mk-midpoint rect { fill: var(--m-midpoint); }
.mk-bbox path { fill: var(--m-bbox); }
.mk-popcenter path { fill: var(--m-popcenter); }
.mk-dealul circle { stroke: var(--m-dealul); }
.mk-dealul circle:first-of-type { stroke-width: 1.6px; fill: var(--card); }
.map-inset .mk-dealul circle:first-of-type { stroke-width: 0.35px; stroke-dasharray: 0.7 0.4; }
.mk-dealul circle:last-of-type { fill: var(--m-dealul); stroke: none; }
#map-figure[data-active="centroid"] .mk:not([data-def="centroid"]),
#map-figure[data-active="midpoint"] .mk:not([data-def="midpoint"]),
#map-figure[data-active="bbox"] .mk:not([data-def="bbox"]),
#map-figure[data-active="popcenter"] .mk:not([data-def="popcenter"]),
#map-figure[data-active="dealul"] .mk:not([data-def="dealul"]) { opacity: 0.22; }
.mk-label {
  font-family: "IBM Plex Mono", monospace; font-size: 1.9px; fill: var(--ink);
  paint-order: stroke; stroke: var(--card); stroke-width: 0.5px; stroke-linejoin: round;
}
#map-figure[data-active="centroid"] .mk[data-def="centroid"] .mk-label,
#map-figure[data-active="midpoint"] .mk[data-def="midpoint"] .mk-label,
#map-figure[data-active="bbox"] .mk[data-def="bbox"] .mk-label,
#map-figure[data-active="popcenter"] .mk[data-def="popcenter"] .mk-label,
#map-figure[data-active="dealul"] .mk[data-def="dealul"] .mk-label { font-weight: 700; }

/* auxiliaries */
.nat-box { fill: none; stroke: var(--muted); stroke-width: 1; stroke-dasharray: 6 4; opacity: 0.8; }
.ext circle { fill: var(--ink); stroke: var(--card); stroke-width: 1px; }
#map-figure[data-active="centroid"] .nat-box,
#map-figure[data-active="midpoint"] .nat-box,
#map-figure[data-active="popcenter"] .nat-box,
#map-figure[data-active="dealul"] .nat-box { display: none; }
#map-figure[data-active="centroid"] .ext,
#map-figure[data-active="bbox"] .ext,
#map-figure[data-active="popcenter"] .ext,
#map-figure[data-active="dealul"] .ext { display: none; }
.zoom-rect { fill: none; stroke: var(--accent); stroke-width: 1.2; stroke-dasharray: 5 3; }
.bucharest rect { fill: var(--muted); }
.bucharest text { font-family: "IBM Plex Mono", monospace; font-size: 14px; fill: var(--muted); }
.north { font-family: "IBM Plex Mono", monospace; font-size: 2.4px; font-weight: 600; fill: var(--muted); }
.scalebar line { stroke: var(--ink); stroke-width: 0.25; }
.scalebar text { font-family: "IBM Plex Mono", monospace; font-size: 2.2px; fill: var(--ink); }

/* ---------- definition panels ---------- */
.def-panels { margin-top: 1rem; }
.def-panel {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 1rem 1.25rem; max-width: 62ch;
}
.def-panel[hidden] { display: none; }
.def-panel h3 { margin: 0 0 0.25rem; font-size: 1.15rem; }
.def-panel p { margin: 0 0 0.5rem; }
.def-panel p:last-child { margin-bottom: 0; }
.def-coords { font-family: "IBM Plex Mono", monospace; font-weight: 600; }
#panel-centroid h3 { color: var(--m-centroid); }
#panel-midpoint h3 { color: var(--m-midpoint); }
#panel-bbox h3 { color: var(--m-bbox); }
#panel-popcenter h3 { color: var(--m-popcenter); }
#panel-dealul h3 { color: var(--m-dealul); }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; margin: 0 -1.25rem; padding: 0 1.25rem; }
table.ledger { border-collapse: collapse; width: 100%; font-size: 0.95rem; background: var(--card); line-height: 1.35; }
table.ledger caption { text-align: left; padding: 0.5rem 0; color: var(--muted); font-size: 0.85rem; }
table.ledger th, table.ledger td { padding: 0.5rem 0.75rem; text-align: left; border-bottom: 1px solid var(--line); }
table.ledger thead th {
  font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted);
  border-bottom: 2px solid var(--line); white-space: nowrap;
}
table.ledger .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
table.ledger tbody tr:hover { background: var(--row-hi); }
table.ledger .num .num { font-family: "IBM Plex Mono", monospace; }
table.ledger tbody th[scope="row"] { font-weight: 600; }
tbody tr[data-def="centroid"] th[scope="row"] { color: var(--m-centroid); }
tbody tr[data-def="midpoint"] th[scope="row"] { color: var(--m-midpoint); }
tbody tr[data-def="bbox"] th[scope="row"] { color: var(--m-bbox); }
tbody tr[data-def="popcenter"] th[scope="row"] { color: var(--m-popcenter); }
tbody tr[data-def="dealul"] th[scope="row"] { color: var(--m-dealul); }
.table-note { color: var(--muted); font-size: 0.9rem; }

/* ---------- prose sections ---------- */
.drift p, .method li, .points p { max-width: 62ch; }
.method ul { padding-left: 1.25rem; }
.method li { margin-bottom: 0.6rem; }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--line); padding: 1.5rem 1.25rem 3rem; text-align: center; color: var(--muted); font-size: 0.9rem; }
footer p { margin: 0 auto; }

@media (max-width: 720px) {
  .map-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .topbar { font-size: 0.85rem; gap: 0.6rem; padding: 0 0.75rem; }
  .topnav { gap: 0.6rem; }
  .ledger-answer { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
  .table-wrap table.ledger { font-size: 0.88rem; }
  table.ledger th, table.ledger td { padding: 0.45rem 0.5rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .mk, .in-host { transition: none; }
}