* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: Arial, Helvetica, sans-serif;
  color: #eef8ff;
  background: radial-gradient(circle at center, #2476c8 0%, #143c77 48%, #081936 100%);
}

.shell {
  width: min(1100px, 96vw);
}

.panel {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

h1,
p {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 5vw, 4rem);
}

.controls {
  color: #bddfff;
}

button {
  margin-left: auto;
  border: 0;
  border-radius: 999px;
  padding: 12px 22px;
  font-weight: 700;
  color: #071a3a;
  background: #9ed6ff;
  cursor: pointer;
  box-shadow: 0 8px 22px rgb(0 0 0 / 24%);
}

canvas {
  width: 100%;
  display: block;
  border: 4px solid rgb(255 255 255 / 28%);
  border-radius: 18px;
  background: radial-gradient(circle at center, #2476c8, #104477 68%, #07264a);
  box-shadow: 0 24px 80px rgb(0 0 0 / 35%);
}