:root {
  color-scheme: dark;
  --bg: #0a131f;
  --panel: rgba(15, 23, 42, 0.8);
  --text: #e2e8f0;
  --muted: rgba(226, 232, 240, 0.72);
  --accent: #facc15;
  --accent-strong: #f97316;
  --radius: 18px;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html, body {
  margin: 0;
  min-height: 100%;
  background: radial-gradient(circle at top, rgba(250, 204, 21, 0.18), transparent 55%), var(--bg);
  color: var(--text);
}

body {
  display: flex;
  flex-direction: column;
  padding: 1.5rem clamp(1.25rem, 3vw, 3rem) 2.5rem;
}

a {
  color: var(--accent-strong);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.brand {
  font-weight: 600;
  font-size: 1rem;
}

.meta {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.label {
  font-weight: 600;
}

.badge {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(250, 204, 21, 0.16);
  border: 1px solid rgba(250, 204, 21, 0.35);
  color: var(--accent);
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 520px) minmax(0, 1fr);
  gap: 2rem;
}

.game-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.scoreboard {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.score-block {
  background: rgba(15, 23, 42, 0.72);
  padding: 0.75rem 1.25rem;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.16);
  min-width: 110px;
}

.score-block .title {
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.score-block .value {
  display: block;
  margin-top: 0.4rem;
  font-size: 1.6rem;
  font-weight: 700;
}

.btn {
  border: none;
  border-radius: 999px;
  padding: 0.75rem 1.5rem;
  background: rgba(250, 204, 21, 0.2);
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn.primary {
  background: linear-gradient(135deg, #facc15, #f97316);
  color: #0f172a;
}

.btn:hover,
.btn:focus-visible {
  outline: none;
  transform: translateY(-1px);
  box-shadow: 0 20px 34px rgba(250, 204, 21, 0.28);
}

.canvas-wrap {
  position: relative;
  width: 100%;
  max-width: 480px;
  background: rgba(15, 23, 42, 0.82);
  border-radius: var(--radius);
  border: 1px solid rgba(148, 163, 184, 0.16);
  box-shadow: 0 28px 48px rgba(15, 23, 42, 0.45);
  overflow: hidden;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
}

.overlay {
  position: absolute;
  inset: 0;
  background: rgba(8, 10, 18, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

.overlay[hidden] {
  display: none !important;
}

.overlay-content {
  background: rgba(15, 23, 42, 0.85);
  border-radius: var(--radius);
  padding: 2rem;
  border: 1px solid rgba(148, 163, 184, 0.18);
  box-shadow: 0 24px 44px rgba(15, 23, 42, 0.4);
}

.overlay-content h2 {
  margin: 0 0 0.75rem;
}

.overlay-content p {
  margin: 0 0 1.5rem;
  color: var(--muted);
}

.info-panel {
  background: rgba(15, 23, 42, 0.72);
  border-radius: var(--radius);
  padding: 1.75rem;
  border: 1px solid rgba(148, 163, 184, 0.16);
  box-shadow: 0 24px 40px rgba(15, 23, 42, 0.4);
  display: grid;
  gap: 1.75rem;
  align-content: start;
}

.info-panel h2 {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
}

.info-panel ul {
  padding-left: 1.2rem;
  margin: 0;
  color: var(--muted);
}

.page-footer {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--muted);
}

kbd {
  display: inline-block;
  border-radius: 6px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  padding: 0.1rem 0.4rem;
  font-size: 0.8rem;
  background: rgba(15, 23, 42, 0.8);
}

@media (max-width: 960px) {
  .layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .canvas-wrap {
    margin: 0 auto;
  }

  .info-panel {
    margin: 0 auto;
    max-width: 520px;
  }
}

@media (max-width: 600px) {
  body {
    padding: 1rem 0.75rem 2rem;
  }

  .top-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .scoreboard {
    gap: 0.75rem;
  }

  .score-block {
    flex: 1 1 130px;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}