* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #7c3aed, #22c55e);
  color: #172033;
  display: grid;
  place-items: center;
}

.game {
  width: min(92vw, 720px);
  background: #ffffff;
  border: 6px solid #172033;
  border-radius: 28px;
  padding: 28px;
  box-shadow: 12px 12px 0 #172033;
}

.eyebrow {
  margin: 0 0 8px;
  color: #7c3aed;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(2rem, 8vw, 4rem);
  margin-bottom: 12px;
}

.intro {
  font-size: 1.2rem;
}

.panel {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 24px 0;
}

.panel > div,
.shop {
  background: #fef3c7;
  border: 4px solid #172033;
  border-radius: 18px;
  padding: 18px;
}

.label {
  display: block;
  font-size: 0.95rem;
  color: #5b6475;
}

strong {
  font-size: 2.2rem;
}

button {
  width: 100%;
  border: 0;
  border-radius: 16px;
  padding: 16px 20px;
  background: #22c55e;
  color: #172033;
  font-size: 1.1rem;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 6px 0 #15803d;
}

button:active {
  transform: translateY(4px);
  box-shadow: 0 2px 0 #15803d;
}

button:disabled {
  background: #cbd5e1;
  box-shadow: 0 6px 0 #64748b;
  cursor: not-allowed;
}

.message {
  margin: 16px 0 0;
  font-weight: 700;
}