:root {
  color-scheme: light;
  --bg: #f2eadf;
  --ink: #1f1a17;
  --accent: #9b3d23;
  --accent-soft: #d28f56;
  --accent-deep: #6f2b1a;
  --panel: rgba(255, 248, 238, 0.82);
  --panel-stroke: rgba(61, 37, 21, 0.14);
  --chip: rgba(117, 73, 44, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.72), transparent 35%),
    linear-gradient(180deg, #efe3cf 0%, #d5b792 100%);
  transition: background 220ms ease, color 220ms ease;
}

body[data-variant="open-edge"] {
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.72), transparent 38%),
    linear-gradient(180deg, #e2edf1 0%, #9eb4bf 100%);
}

.app-shell {
  min-height: 100vh;
  padding: 24px;
  display: grid;
  gap: 18px;
  place-items: center;
}

.hero {
  width: min(1240px, 100%);
  text-align: center;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.28em;
  font-size: 0.75rem;
  color: #6f4f34;
  transition: color 220ms ease;
}

body[data-variant="open-edge"] .eyebrow {
  color: #4a7083;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.5rem, 6vw, 4.4rem);
  letter-spacing: 0.04em;
}

.subtitle {
  margin: 10px auto 0;
  width: min(760px, 100%);
  font-size: 1.05rem;
  line-height: 1.5;
}

.stage {
  width: min(1320px, 100%);
  padding: 20px;
  border-radius: 28px;
  background: rgba(255, 248, 238, 0.82);
  border: 1px solid rgba(61, 37, 21, 0.14);
  box-shadow: 0 24px 80px rgba(72, 43, 20, 0.2);
  backdrop-filter: blur(8px);
  transition: background 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

body[data-variant="open-edge"] .stage {
  background: rgba(246, 250, 252, 0.82);
  border-color: rgba(43, 78, 96, 0.16);
  box-shadow: 0 24px 80px rgba(42, 75, 92, 0.18);
}

.play-area {
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 1fr) 300px;
  align-items: start;
}

canvas {
  width: 100%;
  max-width: 960px;
  aspect-ratio: 1;
  display: block;
  margin: 0 auto;
  border-radius: 22px;
  background: linear-gradient(180deg, #ead8be, #d5b38c);
  box-shadow: inset 0 2px 14px rgba(0, 0, 0, 0.1);
}

.rules-panel {
  padding: 20px;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255, 250, 244, 0.96), rgba(245, 230, 210, 0.96));
  border: 1px solid rgba(99, 57, 31, 0.14);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7), 0 14px 40px rgba(83, 49, 28, 0.12);
  transition: background 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

body[data-variant="open-edge"] .rules-panel {
  background: linear-gradient(180deg, rgba(248, 252, 255, 0.96), rgba(222, 236, 242, 0.96));
  border-color: rgba(53, 92, 112, 0.16);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8), 0 14px 40px rgba(49, 83, 104, 0.12);
}

.rules-kicker {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.72rem;
  color: #8a5c39;
  transition: color 220ms ease;
}

body[data-variant="open-edge"] .rules-kicker {
  color: #5e8597;
}

.rules-panel h2,
.setup-title {
  margin: 10px 0 10px;
  font-size: 1.75rem;
}

.setup-title {
  font-size: 1.22rem;
}

.variant-description,
.rules-note,
#status-line {
  font-size: 0.98rem;
  line-height: 1.45;
}

.variant-description {
  margin: 0 0 16px;
}

.variant-list {
  display: grid;
  gap: 10px;
}

.setup-section {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid rgba(99, 57, 31, 0.12);
}

body[data-variant="open-edge"] .setup-section {
  border-top-color: rgba(53, 92, 112, 0.16);
}

button {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  font: inherit;
  font-size: 0.98rem;
  cursor: pointer;
  color: #fff8f0;
  background: linear-gradient(180deg, var(--accent-soft), var(--accent));
  box-shadow: 0 10px 24px rgba(124, 54, 27, 0.22);
  transition: background 220ms ease, box-shadow 220ms ease, filter 220ms ease, opacity 220ms ease;
}

body[data-variant="open-edge"] button {
  background: linear-gradient(180deg, #77a0b2, #35576a);
  box-shadow: 0 10px 24px rgba(42, 75, 92, 0.22);
}

button:hover {
  filter: brightness(1.04);
}

button:disabled {
  cursor: default;
  opacity: 0.55;
  filter: none;
}

.variant-chip {
  width: 100%;
  text-align: left;
  color: #5b3822;
  background: linear-gradient(180deg, rgba(255, 245, 234, 0.96), rgba(233, 209, 182, 0.96));
  box-shadow: none;
  border: 1px solid rgba(105, 59, 31, 0.16);
}

body[data-variant="open-edge"] .variant-chip {
  color: #385567;
  background: linear-gradient(180deg, rgba(245, 250, 252, 0.98), rgba(207, 226, 234, 0.98));
  border-color: rgba(62, 98, 116, 0.18);
  box-shadow: none;
}

.variant-chip.is-active {
  color: #fff8f0;
  background: linear-gradient(180deg, var(--accent-soft), var(--accent-deep));
  box-shadow: 0 12px 28px rgba(124, 54, 27, 0.22);
}

body[data-variant="open-edge"] .variant-chip.is-active {
  color: #f6fcff;
  background: linear-gradient(180deg, #7fa9bc, #2f5264);
  box-shadow: 0 12px 28px rgba(42, 75, 92, 0.22);
}

.mode-chip {
  font-size: 0.94rem;
}

.utility-chip {
  padding: 10px 14px;
  text-align: center;
}

.compact-list {
  gap: 8px;
}

.compact-list .mode-chip {
  padding-top: 10px;
  padding-bottom: 10px;
}

.history-controls {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-bottom: 12px;
}

.move-history {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  max-height: 220px;
  overflow: auto;
}

.move-history li {
  margin: 0;
}

.history-entry {
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  border-radius: 16px;
  font-size: 0.9rem;
  color: #5b3822;
  background: rgba(117, 73, 44, 0.08);
  border: 1px solid rgba(105, 59, 31, 0.12);
  box-shadow: none;
}

body[data-variant="open-edge"] .history-entry {
  color: #385567;
  background: rgba(64, 102, 121, 0.09);
  border-color: rgba(62, 98, 116, 0.14);
}

.history-entry.is-active {
  color: #fff8f0;
  background: linear-gradient(180deg, var(--accent-soft), var(--accent-deep));
  box-shadow: 0 10px 22px rgba(124, 54, 27, 0.18);
}

body[data-variant="open-edge"] .history-entry.is-active {
  color: #f6fcff;
  background: linear-gradient(180deg, #7fa9bc, #2f5264);
  box-shadow: 0 10px 22px rgba(42, 75, 92, 0.18);
}

.rules-list {
  margin: 16px 0 14px;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.rules-list li {
  line-height: 1.4;
}

.rules-note {
  margin: 0;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(117, 73, 44, 0.08);
  transition: background 220ms ease;
}

body[data-variant="open-edge"] .rules-note {
  background: rgba(64, 102, 121, 0.09);
}

.hud {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: center;
}

#status-line {
  margin: 0;
}

@media (max-width: 1040px) {
  .play-area {
    grid-template-columns: 1fr;
  }

  .rules-panel {
    width: min(960px, 100%);
    margin: 0 auto;
  }
}

@media (max-width: 760px) {
  .app-shell {
    padding: 14px;
  }

  .stage {
    padding: 12px;
    border-radius: 20px;
  }

  .subtitle {
    font-size: 0.98rem;
  }

  .rules-panel {
    padding: 16px;
  }

  .history-controls {
    grid-template-columns: 1fr 1fr;
  }
}