:root {
  --pink: #ca5164;
  --blue: #9bd0bf;
  --light: #f3f8f1;
  --dark: #685c5d;
}
* {
  box-sizing: border-box;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  background-color: var(--blue);
}

button {
  border: 0;
  background-color: var(--pink);
  color: var(--light);
  height: 30px;
  width: 100px;
  border-radius: 4px;
  font-weight: 600;
  transition: 0.3s;
  cursor: pointer;
}
button:focus {
  outline: 0;
}
button:active {
  transform: scale(0.9);
}
button:hover {
  background-color: var(--light);
  color: var(--pink);
  transition: 0.3s;
}

canvas {
  background-color: var(--light);
  border-radius: 10px;
  margin-bottom: 30px;
}

h1 {
  color: var(--pink);
  margin: 30px 0;
  border-bottom: solid 2px var(--pink);
}

/*-----------------------------------------*/
#rules-btn {
  position: absolute;
  top: 55px;
  left: 40px;
}

#rules {
  position: absolute;
  top: 0;
  left: 0;
  min-height: 100vh;
  width: 250px;
  background-color: var(--dark);
  color: var(--light);
  padding: 30px;
  transform: translateX(-250px);
  transition: transform 1s ease-in-out;
}
#rules.show {
  transform: translateX(0);
  transition: transform 1s ease-out;
}

#rules p {
  font-size: 13px;
  line-height: 20px;
  margin-bottom: 40px;
}