html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(1200px 700px at 50% -10%, #2c4a3a 0%, #16281f 55%, #0c1712 100%);
  color: #d7e2d0;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  min-height: 100vh;
}

main {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 12px;
}

#game {
  max-width: 100%;
  height: auto;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.10);
  box-shadow:
    0 24px 60px rgba(0, 0, 0, 0.6),
    0 4px 16px rgba(0, 0, 0, 0.4),
    inset 0 0 0 1px rgba(255, 255, 255, 0.04);
  cursor: pointer;
}

.help {
  margin-top: 14px;
  font-size: 14px;
  opacity: 0.72;
  letter-spacing: 0.2px;
}

kbd {
  background: linear-gradient(#2e4438, #22332a);
  border-radius: 5px;
  padding: 1px 7px;
  border: 1px solid #3d5547;
  border-bottom-width: 2px;
  font-family: inherit;
}