/* TRON Light Cycle Game Styles */

:root {
  --color-neon-cyan: #00f0ff;
  --color-neon-green: #00ff88;
  --color-neon-pink: #ff00aa;
  --color-neon-amber: #ffaa00;
  --color-neon-red: #ff3333;
  --color-bg-primary: #0a0a12;
  --color-bg-secondary: #12121a;
  --color-text-primary: #e0e0e0;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: 'Courier New', monospace;
  min-height: 100vh;
  overflow: hidden;
}

/* Navigation */
.nav {
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-neon-cyan);
  padding: 1rem 2rem;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  color: var(--color-text-primary);
  text-decoration: none;
  font-size: 1.1rem;
  padding: 0.5rem 1rem;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.nav-link.logo {
  color: var(--color-neon-cyan);
  font-weight: bold;
  font-size: 1.3rem;
  text-shadow: 0 0 10px var(--color-neon-cyan);
  margin-right: 1rem;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-neon-cyan);
  border-color: var(--color-neon-cyan);
  box-shadow: 0 0 10px var(--color-neon-cyan);
}

.nav-link.centered {
  margin-left: auto;
  margin-right: auto;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

@media (max-width: 768px) {
  .nav-link.centered {
    position: static;
    transform: none;
    margin: 0;
  }
}

/* Game Container */
.game-container {
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px),
    radial-gradient(ellipse at center, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
  background-size: 40px 40px, 40px 40px, 100% 100%;
  background-position: center center;
  background-repeat: no-repeat;
}

/* Canvas */
#gameCanvas {
  border: 2px solid var(--color-neon-cyan);
  box-shadow:
    0 0 20px rgba(0, 240, 255, 0.3),
    inset 0 0 50px rgba(0, 240, 255, 0.05);
}

/* Screens */
.screen {
  position: absolute;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  z-index: 10;
  text-align: center;
  padding: 3rem;
  background: rgba(10, 10, 18, 0.75);
  border: 1px solid var(--color-neon-cyan);
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.2);
}

.screen.active {
  display: flex;
}

.title {
  font-size: 3rem;
  font-weight: bold;
  letter-spacing: 0.5rem;
  text-transform: uppercase;
}

.neon-text {
  color: var(--color-neon-cyan);
  text-shadow:
    0 0 5px var(--color-neon-cyan),
    0 0 10px var(--color-neon-cyan),
    0 0 20px var(--color-neon-cyan);
}

.instructions {
  font-size: 1.2rem;
  line-height: 2;
}

.key {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid var(--color-neon-cyan);
  border-radius: 4px;
  font-size: 0.9rem;
  color: var(--color-neon-cyan);
  box-shadow: 0 0 5px var(--color-neon-cyan);
}

.btn {
  padding: 1rem 3rem;
  font-size: 1.3rem;
  font-family: inherit;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.2rem;
  cursor: pointer;
  background: transparent;
  border: 2px solid var(--color-neon-cyan);
  color: var(--color-neon-cyan);
  transition: all 0.3s ease;
}

.btn:hover {
  background: rgba(0, 240, 255, 0.2);
  box-shadow:
    0 0 20px var(--color-neon-cyan),
    inset 0 0 20px rgba(0, 240, 255, 0.1);
}

/* Score Display */
.score-display {
  font-size: 1.5rem;
  line-height: 2;
}

.score-display p {
  color: var(--color-text-primary);
}

.score-display span {
  color: var(--color-neon-green);
  text-shadow: 0 0 10px var(--color-neon-green);
}

/* HUD */
.hud {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 3rem;
  font-size: 1.2rem;
  z-index: 5;
  padding: 0.5rem 1.5rem;
  background: rgba(10, 10, 18, 0.8);
  border: 1px solid rgba(0, 240, 255, 0.3);
  border-radius: 4px;
}

.hud .score {
  color: var(--color-neon-cyan);
}

.hud .high-score {
  color: var(--color-neon-amber);
}

.hud span {
  font-weight: bold;
  text-shadow: 0 0 5px currentColor;
}

.hud.visible {
  display: flex;
}

.hud:not(.visible) {
  display: none;
}

/* Particle Effects */
.particle {
  position: absolute;
  pointer-events: none;
  border-radius: 50%;
  animation: particleFade 1s ease-out forwards;
}

@keyframes particleFade {
  0% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(0);
  }
}

/* Responsive */
@media (max-width: 768px) {
  .nav-container {
    gap: 1rem;
  }

  .nav-link {
    font-size: 0.9rem;
    padding: 0.3rem 0.6rem;
  }

  .title {
    font-size: 2rem;
  }

  .instructions {
    font-size: 1rem;
  }

  .screen {
    padding: 2rem;
  }

  .hud {
    font-size: 1rem;
    gap: 1.5rem;
  }
}