:root {
  --bg: #f4eee0;
  --bg2: #e8dcc4;
  --panel: #fbf7ec;
  --panel2: #f3ead6;
  --ink: #2a2118;
  --muted: #6e5c45;
  --rule: #d9c9a8;
  --accent: #7b2d26;
  --accent2: #1e3a5f;
  --gold: #a67c2e;
  --gold-soft: #c9a45c;
  --good: #48664c;
  --shadow: 0 1px 2px rgba(60,45,20,.08), 0 10px 28px rgba(60,45,20,.07);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "EB Garamond", "Times New Roman", serif;
  --sans: ui-sans-serif, -apple-system, "Segue UI", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color-scheme: light;
}
html[data-period="sand"] {
  --bg: #ead9b8; --bg2: #d4c094; --panel: #f6edd8; --panel2: #eadcb8;
  --ink: #2c2416; --muted: #6a5840; --rule: #d4c09a;
  --accent: #1e4d8c; --accent2: #8a5a28; --gold: #c4a35a;
}
html[data-period="marble"] {
  --bg: #e8eef2; --bg2: #d2e0e6; --panel: #f6fafb; --panel2: #e4eef1;
  --ink: #1a2a32; --muted: #4a6570; --rule: #c5d5dc;
  --accent: #1a4a5c; --accent2: #2a6a7a; --gold: #8a734a;
}
html[data-period="travertine"] {
  --bg: #efe6d6; --bg2: #e0d0b4; --panel: #f8f2e6; --panel2: #efe4d0;
  --ink: #2a1c12; --muted: #6b5340; --rule: #d4c4a8;
  --accent: #8b5a2b; --accent2: #7a2e2a; --gold: #b8860b;
}
html[data-period="parchment"] {
  --bg: #f3ead8; --bg2: #e4d3b3; --panel: #fbf6ea; --panel2: #f0e4cc;
  --ink: #2a2118; --muted: #6a5640; --rule: #d4c09a;
  --accent: #5c2d6e; --accent2: #4a1c6a; --gold: #b0893a;
}
html[data-theme="dark"] {
  --bg: #16110c; --bg2: #120e0a; --panel: #221b14; --panel2: #2a2219;
  --ink: #f0e4d0; --muted: #b59a78; --rule: #3d3024;
  --accent: #e08373; --accent2: #8fbf95; --gold: #d4a04a;
  --gold-soft: #c9a45c; --good: #8fbf95;
  --shadow: 0 1px 2px rgba(0,0,0,.45), 0 12px 32px rgba(0,0,0,.4);
  color-scheme: dark;
}
html[data-theme="dark"][data-period="sand"] {
  --accent: #7fb2ff; --accent2: #d4a04a;
}
html[data-theme="dark"][data-period="marble"] {
  --accent: #7ec8d4; --accent2: #8fbf95;
}
html[data-theme="dark"][data-period="travertine"] {
  --accent: #e07a4a; --accent2: #d4a04a;
}
html[data-theme="dark"][data-period="parchment"] {
  --accent: #c9a0d4; --accent2: #d4a04a;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; height: 100dvh; width: 100%; overflow: hidden; }
html {
  background: var(--bg2);
  scrollbar-color: var(--gold-soft) var(--bg2);
  scrollbar-width: thin;
}
body {
  background:
    radial-gradient(1000px 480px at 50% -80px, color-mix(in srgb, var(--panel) 80%, transparent) 0%, transparent 58%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg2) 100%);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17.5px;
  line-height: 1.58;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
  height: 100dvh;
}
button, input, select, textarea { font-family: var(--sans); color: inherit; }
a { color: var(--accent2); }
.app {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  grid-template-rows: auto auto minmax(0, 1fr);
  grid-template-areas:
    "faculty faculty"
    "head head"
    "nav main";
  height: 100%;
  height: 100dvh;
  width: 100%;
  max-width: 100vw;
  overflow: hidden;
}
.faculty-bar {
  grid-area: faculty;
  display: none;
  gap: 10px;
  align-items: center;
  padding: 6px 14px;
  background: #3b2416;
  color: #f6efe2;
  font-family: var(--sans);
  font-size: 12.5px;
}
html.faculty-mode .faculty-bar { display: flex; flex-wrap: wrap; }
.faculty-bar label { display: flex; align-items: center; gap: 6px; }
.faculty-bar input[type="date"] { background: #f6efe2; color: #1a1410; border: 0; border-radius: 4px; padding: 2px 6px; }
.faculty-bar button { background: #c9a45c; border: 0; border-radius: 4px; padding: 4px 10px; cursor: pointer; }
header {
  grid-area: head;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 18px;
  background: var(--panel);
  border-bottom: 1px solid var(--rule);
  min-width: 0;
}
header h1 { font-size: 19px; margin: 0; font-weight: 600; flex: 1; min-width: 0; line-height: 1.25; }
header h1 small { font-weight: 400; color: var(--muted); font-size: 13px; font-family: var(--sans); margin-left: 8px; }
#b-nav { display: none; }
.tbtn {
  background: var(--panel2);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 6px 11px;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
}
.tbtn:hover { border-color: var(--accent2); }
.tbtn.icon { padding: 6px 9px; font-size: 15px; }
.tbtn[aria-pressed="true"] { background: color-mix(in srgb, var(--accent2) 22%, var(--panel)); }
nav {
  grid-area: nav;
  overflow: auto;
  min-height: 0;
  background: var(--panel);
  border-right: 1px solid var(--rule);
  padding: 10px 0 28px;
}
.nav-backdrop { display: none; }
.find { padding: 0 12px 10px; }
.find input {
  width: 100%;
  border: 1px solid var(--rule);
  background: var(--panel2);
  border-radius: 8px;
  padding: 7px 10px;
  font-size: 13px;
}
.nav-group { margin: 8px 0 4px; }
.nav-kicker {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 10px 16px 4px;
}
nav a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
  color: inherit;
  padding: 5px 16px;
  font-size: 14.5px;
  border-left: 3px solid transparent;
}
nav a .num { font-family: var(--sans); font-size: 11px; color: var(--muted); min-width: 1.4em; }
nav a:hover { background: var(--panel2); }
nav a.active { border-left-color: var(--gold); background: var(--panel2); }
nav a.locked { opacity: .55; }
nav a.locked .lock { font-size: 11px; }
nav .sub {
  padding-left: 28px;
  font-size: 13.5px;
  color: var(--muted);
}
.colophon {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--muted);
  padding: 18px 16px 0;
  line-height: 1.45;
}
main {
  grid-area: main;
  overflow: auto;
  min-width: 0;
  min-height: 0;
  padding: 22px 28px 64px;
}
.wrap { max-width: 58rem; }
.kicker {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 6px;
}
h2.lesson { font-size: 28px; margin: 0 0 10px; font-weight: 600; line-height: 1.2; }
.epigraph {
  font-family: var(--serif);
  font-style: italic;
  font-size: 19px;
  line-height: 1.45;
  max-width: 42rem;
  margin: 0 0 16px;
}
.epigraph cite {
  display: block;
  font-style: normal;
  font-size: 17.5px;
  margin-top: 6px;
  color: var(--muted);
}
.lede { font-size: 19px; color: color-mix(in srgb, var(--ink) 88%, var(--muted)); margin: 0 0 18px; }
.prose { max-width: 42rem; }
.prose p, .block p { margin: 0 0 12px; }
.prose h3, .block h3 { font-size: 18px; margin: 22px 0 8px; }
.note {
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--muted);
  border-left: 3px solid var(--gold);
  padding: 2px 0 2px 12px;
  margin: 14px 0;
}
.rooms {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin: 18px 0 8px;
}
.door {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 14px 14px 16px;
  box-shadow: var(--shadow);
  min-height: 108px;
}
.door:hover { border-color: var(--gold); }
.door .k { font-family: var(--sans); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.door h3 { margin: 6px 0 6px; font-size: 16.5px; }
.door p { margin: 0; font-size: 14px; color: var(--muted); }
.door.locked { opacity: .6; }
.grid-3x4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.grid-3x4 .door { min-height: 92px; }
.period-label { font-family: var(--sans); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 16px 0 6px; }

.question {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 18px 20px 16px;
  box-shadow: var(--shadow);
  max-width: 42rem;
}
.question h3 { margin: 0 0 12px; font-size: 20px; }
.options { display: grid; gap: 8px; margin: 12px 0; }
.opt {
  text-align: left;
  background: var(--panel2);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 10px 12px;
  cursor: pointer;
  font-size: 15px;
}
.opt:hover { border-color: var(--accent2); }
.opt.chosen { border-color: var(--gold); }
.opt.correct { border-color: var(--good); background: color-mix(in srgb, var(--good) 16%, var(--panel)); }
.opt.wrong { border-color: var(--accent); }
.reveal {
  margin-top: 12px;
  padding: 12px 0 0;
  border-top: 1px solid var(--rule);
}
.short-row { display: flex; gap: 8px; }
.short-row input {
  flex: 1;
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 8px 10px;
  background: var(--panel2);
  font-size: 15px;
}

.passages {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin: 12px 0 18px;
}
.passage {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 14px 16px 16px;
  box-shadow: var(--shadow);
}
.passage header { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; margin-bottom: 8px; }
.passage h3 { margin: 0; font-size: 16px; }
.who { font-family: var(--sans); font-size: 12px; color: var(--muted); }
.passage .body { font-size: 15.5px; }
.passage .orig { display: none; font-style: italic; color: color-mix(in srgb, var(--ink) 82%, var(--muted)); }
.passage.show-orig .orig { display: block; }
.passage.show-orig .eng { display: none; }
.toggle-lang { font-size: 12px; }

.map-frame, .battle-stage {
  max-width: 42rem;
  min-width: 0;
  margin: 0 0 14px;
}
.map-stage, .battle-stage {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.map-stage img, .battle-stage img.map {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  background: #cfc3a8;
}
img.map.sand { filter: sepia(.28) saturate(.85) contrast(1.05) hue-rotate(8deg); }
img.map.marble { filter: saturate(.55) contrast(1.08) brightness(1.04); }
img.map.travertine { filter: sepia(.22) saturate(.8) contrast(1.06); }
img.map.parchment { filter: sepia(.4) saturate(.7) contrast(1.04) hue-rotate(-12deg); }
.hotspot {
  position: absolute;
  transform: translate(-50%, -50%);
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 2px solid #fbf6ea;
  background: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 40%, transparent);
  cursor: pointer;
  padding: 0;
}
.hotspot:hover, .hotspot.on { background: var(--gold); }
.spot-panel {
  margin-top: 12px;
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 14px 16px;
  max-width: 42rem;
}
.credit { font-family: var(--sans); font-size: 11.5px; color: var(--muted); margin: 6px 0 8px; }
.map-frame .credit { padding: 0 2px 4px; margin-top: 8px; }

.battle-stage { min-height: 0; }
.battle-ground { position: relative; width: 100%; background: #d9c89a; border-radius: 0; }
.battle-ground svg { display: block; width: 100%; height: auto; }
.battle-ground .overlay {
  position: absolute; inset: 0;
  pointer-events: none;
}
.battle-legend { display: flex; flex-wrap: wrap; gap: 12px; margin: 8px 0 4px; font-family: var(--sans); font-size: 12.5px; }
.battle-legend .leg { display: inline-flex; align-items: center; gap: 6px; }
.battle-legend i { width: 11px; height: 11px; border-radius: 2px; display: inline-block; }
.unit {
  position: absolute;
  transform: translate(-50%, -50%);
  pointer-events: none;
  font-family: var(--sans);
  font-size: 11px;
  color: #fbf6ea;
  background: var(--u, #1e3a5f);
  border-radius: 6px;
  padding: 4px 7px 5px;
  max-width: 7.2rem;
  text-align: center;
  line-height: 1.2;
  white-space: normal;
  box-shadow: 0 1px 4px rgba(0,0,0,.4);
}
.unit b {
  display: block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #fff;
  margin: 0 auto 3px;
  opacity: .85;
}
.unit.captured { background: #6e5c45; }
.unit.fleeing { opacity: .9; box-shadow: 0 0 0 2px #f6efe2; }
.unit.victor { box-shadow: 0 0 0 2px var(--gold-soft); }
.battle-result {
  margin: 8px 0 12px;
  max-width: 42rem;
  background: color-mix(in srgb, var(--gold) 18%, var(--panel));
  border: 1px solid var(--gold);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 15.5px;
}
.battle-result strong { display: block; margin-bottom: 2px; }
.place-label {
  position: absolute;
  transform: translate(-50%, -20%);
  font-family: var(--sans);
  font-size: 11px;
  color: var(--ink);
  background: color-mix(in srgb, var(--panel) 82%, transparent);
  padding: 1px 5px;
  border-radius: 3px;
  pointer-events: none;
}
.battle-ui { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 10px 0 14px; }
.battle-ui input[type="range"] { flex: 1; min-width: 140px; }
.beat {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 12px 16px;
  max-width: 42rem;
  min-height: 4.5em;
}
.cf {
  display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 4px;
}
.cf button.on { background: color-mix(in srgb, var(--accent) 18%, var(--panel)); border-color: var(--accent); }

.recon { max-width: 48rem; }
.steps { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 12px; }
.steps button {
  font-size: 12px;
  padding: 5px 9px;
  border-radius: 999px;
  border: 1px solid var(--rule);
  background: var(--panel2);
  cursor: pointer;
}
.steps button.on { background: var(--accent2); color: #fff; border-color: var(--accent2); }
.demo {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 12px;
  margin: 0 0 12px;
  min-height: 220px;
}
.demo svg { display: block; width: 100%; height: auto; }
.demo canvas { display: block; width: 100%; }

.slot {
  background: var(--panel2);
  border: 1px dashed var(--rule);
  border-radius: 12px;
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 18px;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 13px;
  margin: 0 0 8px;
}
.slot img { max-width: 100%; height: auto; display: block; border-radius: 10px; }
.slot.missing { background:
  repeating-linear-gradient(-45deg, var(--panel2), var(--panel2) 8px, color-mix(in srgb, var(--rule) 55%, var(--panel2)) 8px, color-mix(in srgb, var(--rule) 55%, var(--panel2)) 9px);
}
.slot.atmosphere { min-height: 140px; }
.slot.atmosphere.missing { min-height: 64px; }

.contest-legend {
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--muted);
  margin: 0 0 16px;
  max-width: 42rem;
}
.contest-sub { font-size: 17px; margin: 18px 0 8px; }
.contest-chrono { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 8px; }
.contest-chrono button {
  font-family: var(--sans);
  font-size: 12px;
  line-height: 1.25;
  text-align: left;
  padding: 7px 10px;
  border-radius: 10px;
  border: 1px solid var(--rule);
  background: var(--panel2);
  cursor: pointer;
  max-width: 11.5rem;
}
.contest-chrono button strong { display: block; font-size: 13px; }
.contest-chrono button span { color: var(--muted); }
.contest-chrono button.on { background: var(--accent2); color: #fff; border-color: var(--accent2); }
.contest-chrono button.on span { color: color-mix(in srgb, #fff 72%, var(--accent2)); }
.contest-chrono-note { font-size: 15.5px; max-width: 42rem; margin: 0 0 16px; }
.contest-topics { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0 14px; }
.contest-topics button {
  font-family: var(--sans);
  font-size: 13px;
  padding: 7px 11px;
  border-radius: 999px;
  border: 1px solid var(--rule);
  background: var(--panel2);
  cursor: pointer;
}
.contest-topics button.on { background: var(--accent2); color: #fff; border-color: var(--accent2); }
.contest-tension {
  font-size: 16.5px;
  border-left: 3px solid var(--gold);
  padding: 2px 0 2px 12px;
  margin: 0 0 12px;
  max-width: 42rem;
}
.contest-count {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 8px;
}
.contest-filters { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 12px; }
.contest-filters .tbtn.on { background: var(--accent2); color: #fff; border-color: var(--accent2); }
.contest-views {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 12px;
  margin: 0 0 16px;
}
.view-card {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 12px 14px 14px;
  box-shadow: var(--shadow);
}
.view-card.opposing { border-left: 3px solid var(--accent); }
.view-card.complementary { border-left: 3px solid var(--good); }
.view-card .stance {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}
.view-card.opposing .stance { color: var(--accent); }
.view-card.complementary .stance { color: var(--good); }
.view-card h4 { margin: 0 0 4px; font-size: 16.5px; }
.view-card .claim { font-style: italic; margin: 8px 0; }
.view-card .evidence { font-size: 15.5px; }
.view-card .evidence p { margin: 0 0 8px; }
.shifts { max-width: 42rem; }
.connections li { margin: 0 0 10px; }
.resources li { margin: 0 0 6px; }

.locked-msg {
  max-width: 36rem;
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.one-many { font-size: 15.5px; }
.one-many details { background: var(--panel); border: 1px solid var(--rule); border-radius: 10px; padding: 8px 12px; margin: 8px 0; }
.one-many summary { cursor: pointer; font-weight: 600; }

.cf-premise {
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--muted);
  max-width: 42rem;
  margin: 0 0 10px;
  padding: 8px 12px;
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 7%, var(--panel2));
  border-radius: 0 8px 8px 0;
}
.cf-premise strong { color: var(--ink); }
.cf-flag {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 8px;
}
.dispute-shifts { max-width: 42rem; margin-top: 4px; }
.dispute-shifts h4 {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 18px 0 6px;
}
.passage .stance {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}
.passage.opposing { border-left: 3px solid var(--accent); }
.passage.complementary { border-left: 3px solid var(--good); }
.passage.opposing .stance { color: var(--accent); }
.passage.complementary .stance { color: var(--good); }

@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; grid-template-areas: "faculty" "head" "main"; }
  nav {
    position: fixed; inset: 0 auto 0 0; width: min(86vw, 320px);
    transform: translateX(-105%); transition: transform .2s; z-index: 40;
  }
  html.nav-open nav { transform: none; }
  .nav-backdrop { display: block; position: fixed; inset: 0; background: rgba(20,14,8,.4); z-index: 30; opacity: 0; pointer-events: none; }
  html.nav-open .nav-backdrop { opacity: 1; pointer-events: auto; }
  #b-nav { display: inline-flex; }
  main { padding: 16px 16px 48px; }
  .grid-3x4 { grid-template-columns: 1fr 1fr; }
  header h1 small { display: none; }
}