@import url("https://fonts.googleapis.com/css2?family=Press+Start+2P&display=swap");

:root {
  --background-color: #2a2a3c;
  --background-secondary-color: #1a1a2e;
  --canvas-color: #0f0f1a;
  --text-color: #00ff9f;
  --sidebar-color: #1a1a2e;
  --button-color: #ff2e63;
  --hover-color: #ff1f4f;
  --glow-color: #00ff9f;
}

* {
  box-sizing: border-box;
}

body {
  background-color: var(--background-color);
  background: linear-gradient(
    45deg,
    var(--background-color),
    var(--background-secondary-color)
  );
  font-family: "Press Start 2P", cursive;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
  color: var(--text-color);
  text-shadow: 0 0 10px var(--glow-color);
}

h1 {
  font-size: 2.5rem;
  color: var(--text-color);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 2rem;
  animation: glow 1.5s ease-in-out infinite alternate;
}

@keyframes glow {
  from {
    text-shadow: 0 0 10px var(--glow-color);
  }
  to {
    text-shadow: 0 0 20px var(--glow-color), 0 0 30px var(--glow-color);
  }
}

canvas {
  background-color: var(--canvas-color);
  display: block;
  border-radius: 5px;
  width: 800px;
  max-width: 96%;
  box-shadow: 0 0 20px rgba(0, 255, 159, 0.3);
  border: 2px solid var(--text-color);
}

.btn {
  cursor: pointer;
  border: 0;
  padding: 0.625rem 1.25rem;
  background-color: var(--button-color);
  color: white;
  border-radius: 5px;
  font-family: inherit;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all 0.3s ease;
  box-shadow: 0 0 10px rgba(255, 46, 99, 0.3);
}

.btn:focus {
  outline: 0;
}

.btn:hover {
  background-color: var(--hover-color);
  transform: translateY(-2px);
  box-shadow: 0 0 15px rgba(255, 46, 99, 0.5);
}

.btn:active {
  transform: scale(0.98);
}

.rules-btn {
  position: absolute;
  top: 1.875rem;
  left: 1.875rem;
}

.rules {
  position: absolute;
  top: 0;
  left: 0;
  background-color: var(--sidebar-color);
  color: var(--text-color);
  min-height: 100vh;
  width: 400px;
  padding: 3rem;
  line-height: 1.8;
  transform: translateX(-400px);
  transition: transform 0.5s ease-in-out;
  border-right: 2px solid var(--text-color);
  box-shadow: 0 0 20px rgba(0, 255, 159, 0.2);
}

.rules.show {
  transform: translateX(0);
}

.rules h2 {
  color: var(--button-color);
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
}

.rules p {
  margin-bottom: 1rem;
  font-size: 0.8rem;
}

.rules ul {
  list-style: none;
  padding-left: 1rem;
  margin-bottom: 1.5rem;
}

.rules li {
  margin-bottom: 0.5rem;
  font-size: 0.8rem;
  position: relative;
  padding-left: 1.5rem;
}

.rules li::before {
  content: ">";
  position: absolute;
  left: 0;
  color: var(--button-color);
}