:root {
  --neon-pink: #ff2d55;
  --neon-blue: #00fff9;
  --neon-purple: #b026ff;
  --neon-yellow: #fff600;
  --dark-bg: #0a0a0f;
}

body {
  -webkit-user-select: none; /* Safari */
  -moz-user-select: none; /* Firefox */
  -ms-user-select: none; /* Internet Explorer/Edge */
  user-select: none; /* Standard syntax */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 20px 0;
  height: 100vh;
  background-color: var(--dark-bg);
  background-image: linear-gradient(
      45deg,
      rgba(0, 255, 249, 0.05) 1%,
      transparent 1%
    ),
    linear-gradient(-45deg, rgba(255, 45, 85, 0.05) 1%, transparent 1%);
  background-size: 3px 3px;
  color: #fff;
  position: relative;
  min-height: 100vh;
  box-sizing: border-box;
}

#board {
  background-color: rgba(0, 0, 0, 0.8);
  border: 2px solid var(--neon-blue);
  box-shadow: 0 0 20px var(--neon-blue), inset 0 0 20px var(--neon-blue);
  border-radius: 5px;
  width: 90%;
  max-width: 500px;
  aspect-ratio: 1;
  position: relative;
  z-index: 1;
}
#controls {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  width: 90%;
  /* max-width: 500px; */
  margin-top: 10px;
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}
.control-section {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.control-button {
  width: 70px;
  height: 70px;
  font-size: 36px;
  margin: 5px;
  background: transparent;
  border: 2px solid var(--neon-purple);
  color: var(--neon-purple);
  box-shadow: 0 0 10px var(--neon-purple);
  transition: all 0.3s;
  border-radius: 5px;
}

h3 {
  margin: 0;
  padding: 0;
}
.power-up {
  background-color: #ffd700;
  width: 15px;
  height: 15px;
  position: absolute;
}

.menu-container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  background: rgba(10, 10, 15, 0.95);
  padding: 2rem;
  border-radius: 10px;
  z-index: 1000;
  border: 2px solid var(--neon-pink);
  box-shadow: 0 0 30px var(--neon-pink);
  backdrop-filter: blur(5px);
}

.menu-container h1 {
  color: var(--neon-pink);
  text-shadow: 0 0 10px var(--neon-pink);
  font-family: "Orbitron", sans-serif;
  letter-spacing: 2px;
  font-size: 3rem;
  margin-bottom: 2rem;
}

.menu-container button {
  background: transparent;
  border: 2px solid var(--neon-blue);
  color: var(--neon-blue);
  text-shadow: 0 0 5px var(--neon-blue);
  box-shadow: 0 0 10px var(--neon-blue);
  font-family: "Orbitron", sans-serif;
  text-transform: uppercase;
  letter-spacing: 2px;
  transition: all 0.3s;
  padding: 1rem 2rem;
  font-size: 1.2rem;
  border-radius: 5px;
  cursor: pointer;
  margin: 0.5rem 0;
  display: block;
  width: 200px;
  margin-left: auto;
  margin-right: auto;
}

.menu-container button:hover {
  background: var(--neon-blue);
  color: var(--dark-bg);
  box-shadow: 0 0 20px var(--neon-blue);
}

.instructions {
  color: #fff;
  margin-top: 2rem;
  transition: opacity 0.3s, transform 0.3s;
  opacity: 1;
  transform: translateY(0);
}

.instructions h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.hidden {
  display: none;
}

.instructions.hidden {
  opacity: 0;
  transform: translateY(-20px);
  pointer-events: none;
}

.game-mode {
  margin-top: 2rem;
  text-align: left;
}

.mode-switch {
  display: flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
  margin-bottom: 1rem;
}

.mode-switch input {
  margin-right: 10px;
  width: 20px;
  height: 20px;
}

.mode-switch .slider {
  color: var(--neon-blue);
  text-shadow: 0 0 5px var(--neon-blue);
  font-size: 1.1rem;
}

.pause-button {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: 2px solid var(--neon-yellow);
  color: var(--neon-yellow);
  box-shadow: 0 0 10px var(--neon-yellow);
  text-shadow: 0 0 5px var(--neon-yellow);
  font-size: 24px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  transition: background-color 0.3s;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pause-button:hover {
  background: var(--neon-yellow);
  color: var(--dark-bg);
  box-shadow: 0 0 20px var(--neon-yellow);
}

.pause-menu {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(10, 10, 15, 0.95);
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  z-index: 1000;
  border: 2px solid var(--neon-yellow);
  box-shadow: 0 0 30px var(--neon-yellow);
  backdrop-filter: blur(5px);
  min-width: 300px;
}

.pause-menu h2 {
  color: var(--neon-yellow);
  text-shadow: 0 0 10px var(--neon-yellow);
  font-family: "Orbitron", sans-serif;
  font-size: 2rem;
  margin-bottom: 2rem;
  letter-spacing: 2px;
}

.pause-menu button {
  background: transparent;
  border: 2px solid var(--neon-blue);
  color: var(--neon-blue);
  text-shadow: 0 0 5px var(--neon-blue);
  box-shadow: 0 0 10px var(--neon-blue);
  font-family: "Orbitron", sans-serif;
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 1rem 2rem;
  font-size: 1.2rem;
  border-radius: 5px;
  cursor: pointer;
  margin: 0.5rem 0;
  width: 200px;
  transition: all 0.3s;
}

.pause-menu button:hover {
  background: var(--neon-blue);
  color: var(--dark-bg);
  box-shadow: 0 0 20px var(--neon-blue);
}

.pause-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(3px);
  z-index: 999;
}

/* Add glitch effect for game over */
@keyframes glitch {
  0% {
    transform: translate(0);
  }
  20% {
    transform: translate(-2px, 2px);
  }
  40% {
    transform: translate(-2px, -2px);
  }
  60% {
    transform: translate(2px, 2px);
  }
  80% {
    transform: translate(2px, -2px);
  }
  100% {
    transform: translate(0);
  }
}

.game-over {
  animation: glitch 0.3s infinite;
}

.reset-button {
  display: none;
}

.opponent-select {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.opponent-select .mode-switch input[type="radio"] {
  margin-right: 10px;
  width: 20px;
  height: 20px;
}

.opponent-select .mode-switch {
  margin-bottom: 0.5rem;
}

.difficulty-select {
  margin-top: 1rem;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.3s, transform 0.3s;
  overflow: hidden;
}

.difficulty-select.hidden {
  opacity: 0;
  transform: translateY(-20px);
  pointer-events: none;
}

.difficulty-select h3 {
  color: var(--neon-purple);
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.difficulty-select .mode-switch {
  margin-bottom: 0.3rem;
  margin-left: 1rem;
}