:root {
  color-scheme: dark;
  --bg: #050505;
  --panel: rgba(8, 8, 8, 0.94);
  --panel-edge: rgba(255, 255, 255, 0.12);
  --text: #f3f1ea;
  --muted: rgba(243, 241, 234, 0.72);
  --muted-soft: rgba(243, 241, 234, 0.52);
  --accent: #ffffff;
  --shadow: rgba(0, 0, 0, 0.56);
  --button: rgba(255, 255, 255, 0.06);
  --button-hover: rgba(255, 255, 255, 0.12);
  --radius-lg: 30px;
  --radius-md: 18px;
  --radius-sm: 999px;
  --panel-width: min(96vw, 1080px);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Inter", "Segoe UI", "Trebuchet MS", system-ui, sans-serif;
  background:
    radial-gradient(circle at 50% 16%, rgba(255, 255, 255, 0.1), transparent 22%),
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.012) 0,
      rgba(255, 255, 255, 0.012) 2px,
      transparent 2px,
      transparent 26px
    ),
    linear-gradient(180deg, #171717 0%, #090909 34%, #030303 100%);
  color: var(--text);
}

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.app-shell {
  width: 100%;
  display: grid;
  place-items: center;
}

.game-panel {
  width: var(--panel-width);
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.08), transparent 32%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.045), transparent 26%),
    var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: var(--radius-lg);
  box-shadow:
    0 36px 100px rgba(0, 0, 0, 0.6),
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    inset 0 0 0 1px rgba(255, 255, 255, 0.03);
  padding: clamp(20px, 3vw, 34px);
  backdrop-filter: blur(12px);
  position: relative;
}

.game-panel::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 24px;
  pointer-events: none;
}

.panel-header {
  display: grid;
  justify-items: center;
  gap: 10px;
  text-align: center;
}

.crest-wrap {
  width: min(100%, 368px);
  margin-inline: auto;
}

.crest-logo {
  width: 100%;
  height: auto;
  display: block;
  mix-blend-mode: screen;
  opacity: 0.94;
  filter: saturate(0) contrast(1.04) brightness(1.02);
}

.subtitle {
  max-width: 46rem;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.65;
}

.header-copy {
  max-width: 30rem;
  margin-top: 0;
  font-size: 0.96rem;
  line-height: 1.55;
}

.control-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  justify-content: center;
  gap: 12px;
  margin-top: 20px;
}

.status-card,
.metric-chip,
.pill,
.control-button {
  min-height: 48px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.pill,
.metric-chip,
.control-button {
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font: inherit;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.82rem;
}

.pill {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.028), rgba(255, 255, 255, 0.012)),
    rgba(255, 255, 255, 0.02);
  color: rgba(243, 241, 234, 0.62);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.035),
    inset 0 -10px 18px rgba(0, 0, 0, 0.12);
}

.metric-chip {
  min-width: 108px;
  flex-direction: column;
  gap: 1px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.012)),
    rgba(255, 255, 255, 0.018);
  color: rgba(243, 241, 234, 0.66);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.032),
    inset 0 -12px 18px rgba(0, 0, 0, 0.14);
}

.metric-label {
  font-size: 0.66rem;
  letter-spacing: 0.06em;
}

.metric-value {
  color: var(--text);
  font-size: 1rem;
}

.status-card {
  display: inline-grid;
  gap: 4px;
  min-width: 280px;
  padding: 12px 16px;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.038),
    rgba(255, 255, 255, 0.016)
  );
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.03),
    inset 0 -16px 20px rgba(0, 0, 0, 0.12),
    0 10px 22px rgba(0, 0, 0, 0.14);
  text-align: left;
}

.status-label,
.status-hint {
  color: var(--muted);
  font-size: 0.82rem;
}

#board-status {
  color: rgba(243, 241, 234, 0.96);
}

.control-button {
  cursor: pointer;
  color: var(--text);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04)),
    var(--button);
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    opacity 180ms ease;
  box-shadow:
    0 14px 30px rgba(0, 0, 0, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.control-button:hover,
.control-button:focus-visible {
  background: var(--button-hover);
  border-color: rgba(255, 255, 255, 0.24);
  transform: translateY(-1px);
}

.control-button:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.62);
  outline-offset: 2px;
}

.control-button:disabled {
  cursor: default;
  opacity: 0.46;
  transform: none;
}

.control-button--ghost[aria-pressed="true"] {
  background: rgba(255, 255, 255, 0.16);
  color: var(--accent);
}

.instruction-line {
  max-width: 56rem;
  margin: 18px auto 0;
  padding: 14px 18px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 16px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.014)),
    rgba(255, 255, 255, 0.02);
  color: rgba(243, 241, 234, 0.9);
  text-align: center;
  line-height: 1.6;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.024),
    inset 0 -14px 22px rgba(0, 0, 0, 0.1);
}

.board-shell {
  margin-top: 28px;
}

.board-frame {
  width: min(100%, 860px);
  margin: 0 auto;
  padding: clamp(12px, 2vw, 18px);
  border-radius: calc(var(--radius-lg) - 8px);
  background:
    radial-gradient(circle at 50% 8%, rgba(255, 255, 255, 0.075), transparent 22%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.016));
  border: 1px solid rgba(255, 255, 255, 0.075);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.04),
    inset 0 0 0 1px rgba(255, 255, 255, 0.03),
    0 28px 70px rgba(0, 0, 0, 0.42);
  transition: box-shadow 220ms ease;
}

.board-frame.is-overlay-visible {
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.04),
    inset 0 0 0 1px rgba(255, 255, 255, 0.03),
    0 28px 80px rgba(0, 0, 0, 0.48);
}

.board-heading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 12px;
}

.board-label {
  margin: 0;
  font-family: "Cinzel", "Times New Roman", serif;
  font-weight: 600;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.board-rule {
  width: min(14vw, 120px);
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.26) 18%,
    rgba(255, 255, 255, 0.62) 50%,
    rgba(255, 255, 255, 0.26) 82%,
    transparent 100%
  );
}

.board-stage {
  position: relative;
}

.game-board {
  width: 100%;
  aspect-ratio: 1;
  min-height: min(76vw, 720px);
  display: grid;
  place-items: center;
  border-radius: 20px;
  overflow: hidden;
  touch-action: manipulation;
  background:
    radial-gradient(circle at 50% 22%, rgba(255, 255, 255, 0.055), transparent 28%),
    radial-gradient(circle at 50% 78%, rgba(0, 0, 0, 0.32), transparent 38%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.024), rgba(0, 0, 0, 0.34));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.03),
    inset 0 -24px 48px rgba(0, 0, 0, 0.28);
}

.game-board canvas {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 20px;
  filter: saturate(0.94) contrast(1.08) brightness(1.01);
}

.result-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: clamp(16px, 3vw, 28px);
  background: rgba(2, 2, 2, 0.62);
  backdrop-filter: blur(3px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms ease;
}

.result-overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.overlay-card {
  width: min(100%, 380px);
  padding: 24px 22px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.08), transparent 34%),
    rgba(10, 10, 10, 0.92);
  box-shadow:
    0 24px 60px rgba(0, 0, 0, 0.44),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  text-align: center;
}

.overlay-kicker {
  margin: 0;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
}

.overlay-title {
  margin: 10px 0 0;
  font-family: "Cinzel", "Times New Roman", serif;
  font-weight: 600;
  font-size: clamp(2rem, 6vw, 2.8rem);
  line-height: 0.95;
}

.overlay-copy {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.overlay-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 18px;
}

.panel-footer {
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.94rem;
  text-align: center;
}

.panel-footer p {
  margin: 0;
}

.page-credit {
  margin: 28px 0 2px;
  color: var(--muted-soft);
  font-family: "Cinzel", "Times New Roman", serif;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-align: center;
  text-transform: uppercase;
}

@media (max-width: 860px) {
  .status-card {
    min-width: min(100%, 320px);
  }
}

@media (max-width: 760px) {
  body {
    padding: 16px;
  }

  .control-bar {
    gap: 10px;
  }

  .pill,
  .metric-chip,
  .status-card,
  .control-button {
    flex: 1 1 210px;
  }

  .crest-wrap {
    width: min(100%, 344px);
  }

  .overlay-actions {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .control-button,
  .result-overlay {
    transition: none;
  }
}