@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;700;900&family=Press+Start+2P&display=swap');

:root {
  --bg-color: #0b0214;
  --panel-bg: rgba(18, 8, 32, 0.75);
  --neon-cyan: #00f3ff;
  --neon-pink: #ff007f;
  --neon-green: #39ff14;
  --neon-yellow: #ffe600;
  --neon-purple: #9d4edd;
  --neon-white: #ffffff;
  --text-primary: #ffffff;
  --font-arcade: 'Press Start 2P', monospace;
  --font-ui: 'Montserrat', sans-serif;
  --shadow-neon: 0 0 10px var(--neon-pink), 0 0 20px rgba(255, 0, 127, 0.5);
  --shadow-neon-cyan: 0 0 10px var(--neon-cyan), 0 0 20px rgba(0, 243, 255, 0.5);
  --shadow-neon-green: 0 0 10px var(--neon-green), 0 0 20px rgba(57, 255, 20, 0.5);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-ui);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  overflow: hidden;
  position: relative;
}

/* Background grid effect */
body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(rgba(157, 78, 221, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(157, 78, 221, 0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center;
  z-index: -1;
  pointer-events: none;
}

/* Game wrapper maintaining horizontal layout */
#game-wrapper {
  position: relative;
  width: 900px;
  height: 480px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.8), 
              0 0 20px rgba(157, 78, 221, 0.3),
              inset 0 0 2px var(--neon-pink);
  border: 2px solid rgba(255, 0, 127, 0.5);
  background-color: #000;
}

/* Responsive Scaling for smaller displays */
@media (max-width: 960px) {
  #game-wrapper {
    transform: scale(0.85);
  }
}
@media (max-width: 780px) {
  #game-wrapper {
    transform: scale(0.7);
  }
}
@media (max-width: 640px) {
  #game-wrapper {
    transform: scale(0.55);
  }
}
@media (max-width: 500px) {
  #game-wrapper {
    transform: scale(0.42);
  }
}

/* The Game Canvas */
#game-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* HUD elements overlay */
#hud {
  position: absolute;
  top: 20px;
  left: 20px;
  right: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
  z-index: 10;
}

.hud-panel {
  background: var(--panel-bg);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(0, 243, 255, 0.3);
  padding: 10px 16px;
  border-radius: 8px;
  font-family: var(--font-arcade);
  font-size: 14px;
  color: var(--neon-cyan);
  text-shadow: 0 0 5px rgba(0, 243, 255, 0.7);
  box-shadow: inset 0 0 10px rgba(0, 243, 255, 0.1);
}

#highscore-display {
  color: var(--neon-yellow);
  border-color: rgba(255, 230, 0, 0.3);
  text-shadow: 0 0 5px rgba(255, 230, 0, 0.7);
}

/* Screens / Overlays */
.overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: rgba(10, 5, 20, 0.85);
  backdrop-filter: blur(10px);
  z-index: 20;
  transition: opacity 0.3s ease, transform 0.3s ease;
  padding: 30px;
  text-align: center;
}

.overlay.hidden {
  opacity: 0;
  pointer-events: none;
  transform: scale(1.05);
}

/* RGB Glitch Header */
.game-title {
  font-family: var(--font-arcade);
  font-size: 32px;
  color: #fff;
  margin-bottom: 25px;
  text-transform: uppercase;
  text-shadow: 
    3px 3px 0px var(--neon-pink),
    -3px -3px 0px var(--neon-cyan);
  animation: titleGlow 2s infinite alternate;
}

.game-instructions {
  font-size: 14px;
  line-height: 1.6;
  max-width: 450px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 35px;
}

.game-instructions span {
  color: var(--neon-yellow);
  font-weight: bold;
}

/* Big Buttons */
.btn-neon {
  background: var(--panel-bg);
  border: 2px solid var(--neon-pink);
  color: #fff;
  font-family: var(--font-arcade);
  font-size: 16px;
  padding: 15px 30px;
  border-radius: 8px;
  cursor: pointer;
  outline: none;
  box-shadow: var(--shadow-neon);
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
}

.btn-neon:hover {
  transform: translateY(-3px) scale(1.05);
  background: var(--neon-pink);
  box-shadow: 0 0 25px var(--neon-pink), 0 0 50px rgba(255, 0, 127, 0.8);
  text-shadow: 0 0 5px #fff;
}

.btn-neon:active {
  transform: translateY(1px);
}

/* Game Over overlay styling */
#game-over-screen {
  background: rgba(18, 4, 18, 0.9);
}

.game-over-title {
  font-family: var(--font-arcade);
  font-size: 40px;
  color: var(--neon-pink);
  margin-bottom: 10px;
  animation: glitchText 0.4s infinite alternate;
  text-shadow: 
    4px 0 var(--neon-cyan), 
    -4px 0 var(--neon-pink), 
    0 0 15px var(--neon-pink);
}

.game-over-subtitle {
  font-size: 18px;
  color: var(--neon-yellow);
  margin-bottom: 30px;
  text-transform: uppercase;
  font-family: var(--font-arcade);
}

.stats-container {
  display: flex;
  gap: 20px;
  margin-bottom: 40px;
}

.stat-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 15px 25px;
  min-width: 140px;
}

.stat-label {
  font-size: 11px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 8px;
}

.stat-value {
  font-family: var(--font-arcade);
  font-size: 20px;
  color: #fff;
}

.stat-value.highlight {
  color: var(--neon-green);
  text-shadow: 0 0 8px rgba(57, 255, 20, 0.5);
}

/* Screen Effects */
#screen-effects-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 15;
}

/* Red Death Flash Effect */
.flash-effect {
  animation: flashRed 0.4s ease-out forwards;
}

/* Canvas Shake animation wrapper */
.shake-effect {
  animation: shakeCanvas 0.3s cubic-bezier(.36,.07,.19,.97) both;
}

/* Ambient retro scanlines overlay for that subtle CRT aesthetic */
.scanlines {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    rgba(18, 16, 16, 0) 50%, 
    rgba(0, 0, 0, 0.25) 50%
  ), linear-gradient(
    90deg, 
    rgba(255, 0, 0, 0.04), 
    rgba(0, 255, 0, 0.01), 
    rgba(0, 0, 255, 0.04)
  );
  background-size: 100% 4px, 6px 100%;
  pointer-events: none;
  z-index: 18;
}

/* Audio control toggle in bottom-right corner */
#audio-control {
  position: absolute;
  bottom: 15px;
  right: 15px;
  z-index: 25;
  background: var(--panel-bg);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  color: #fff;
  font-size: 18px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
  transition: all 0.2s ease;
}

#audio-control:hover {
  border-color: var(--neon-cyan);
  box-shadow: 0 0 10px rgba(0, 243, 255, 0.4);
  transform: scale(1.08);
}

/* Keyframes */
@keyframes titleGlow {
  from {
    text-shadow: 
      2px 2px 0px var(--neon-pink),
      -2px -2px 0px var(--neon-cyan),
      0 0 10px rgba(255, 0, 127, 0.2);
  }
  to {
    text-shadow: 
      3px 3px 0px var(--neon-pink),
      -3px -3px 0px var(--neon-cyan),
      0 0 20px var(--neon-pink),
      0 0 30px var(--neon-purple);
  }
}

@keyframes glitchText {
  0% {
    text-shadow: 3px 0 var(--neon-cyan), -3px 0 var(--neon-pink);
  }
  20% {
    text-shadow: -3px 0 var(--neon-cyan), 3px 0 var(--neon-pink);
  }
  40% {
    text-shadow: 3px 1px var(--neon-cyan), -3px -1px var(--neon-pink);
  }
  60% {
    text-shadow: -3px -1px var(--neon-cyan), 3px 1px var(--neon-pink);
  }
  80% {
    text-shadow: 2px 0 var(--neon-cyan), -2px 0 var(--neon-pink);
  }
  100% {
    text-shadow: -2px 0 var(--neon-cyan), 2px 0 var(--neon-pink);
  }
}

@keyframes flashRed {
  0% {
    background-color: rgba(255, 0, 50, 0.85);
  }
  40% {
    background-color: rgba(255, 0, 50, 0.6);
  }
  100% {
    background-color: rgba(255, 0, 50, 0);
  }
}

@keyframes shakeCanvas {
  10%, 90% { transform: translate3d(-2px, 0, 0); }
  20%, 80% { transform: translate3d(3px, 0, 0); }
  30%, 50%, 70% { transform: translate3d(-5px, -3px, 0); }
  40%, 60% { transform: translate3d(5px, 3px, 0); }
}