* {
  box-sizing: border-box;
}
html {
  min-height: 100%;
  background: #0c2135;
}
body {
  margin: 0;
  color: #edf5f8;
  font-family: system-ui, sans-serif;
  text-align: center;
  background: radial-gradient(ellipse at 50% 30%, #234767, #0c2135 75%);
  min-height: 100vh;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 44px 20px 28px;
}
.eyebrow {
  color: #a6c6d8;
  font-size: 11px;
  letter-spacing: 0.18em;
  font-weight: 700;
}
h1 {
  font-size: clamp(32px, 6vw, 48px);
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin: 18px 0 14px;
}
h1 span {
  color: #b9def0;
}
.intro {
  color: #c8d8e3;
  margin-bottom: 28px;
}
canvas {
  display: block;
  cursor: pointer;
  width: min(100%, 640px);
  height: auto;
  aspect-ratio: 8 / 5;
  background: #809cc9;
  margin: auto;
  border-radius: 12px;
  box-shadow:
    0 18px 50px #0005,
    0 0 0 1px #ffffff26;
  touch-action: none;
}
.instructions {
  max-width: 580px;
  margin: 22px auto;
  font-size: 14px;
  color: #cfdee7;
  line-height: 1.6;
}
footer {
  margin-top: 32px;
  color: #92adbf;
  font-size: 11px;
  line-height: 1.8;
}
a {
  color: #bfdce9;
}
@media (max-width: 480px) {
  main {
    padding: 28px 12px 20px;
  }
  .eyebrow {
    font-size: 9px;
  }
  h1 span {
    display: block;
  }
  .intro {
    font-size: 14px;
  }
}