/**
 * Snake Reloaded - Premium Stylesheet
 * Integrates pixelated & cyber-retro typography, dark neon palettes,
 * custom glassmorphism components, realistic CRT monitor overlays,
 * and responsive arcade console mechanics.
 */

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

/* --- Custom CSS Variables & Tokens --- */
:root {
  --color-dark-obsidian: #050508;
  --color-cyber-black: #0c0c10;
  --color-neon-green: #39FF14;
  --color-neon-green-glow: rgba(57, 255, 20, 0.4);
  --color-neon-red: #FF3131;
  --color-neon-red-glow: rgba(255, 49, 49, 0.4);
  --color-neon-gold: #FFD700;
  --color-neon-gold-glow: rgba(255, 215, 0, 0.5);
  
  --font-arcade: 'Press Start 2P', 'Courier New', monospace;
  --font-cyber: 'Orbitron', sans-serif;
  
  --glass-bg: rgba(12, 12, 16, 0.7);
  --glass-border: rgba(57, 255, 20, 0.15);
}

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

body {
  background-color: var(--color-dark-obsidian);
  background-image: 
    radial-gradient(circle at 50% 20%, rgba(57, 255, 20, 0.08) 0%, transparent 60%),
    radial-gradient(circle at 10% 80%, rgba(255, 49, 49, 0.03) 0%, transparent 40%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
  font-family: var(--font-cyber);
  color: #ffffff;
  overflow-x: hidden;
}

/* --- Container Structure --- */
.game-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  max-width: 660px;
  width: 100%;
}

/* --- Header & Title --- */
header {
  text-align: center;
  margin-bottom: 5px;
}

.brand-title {
  font-size: 26px;
  font-family: var(--font-arcade);
  color: var(--color-neon-green);
  text-shadow: 0 0 10px var(--color-neon-green-glow);
  letter-spacing: -1px;
  margin-bottom: 6px;
  animation: neon-pulse 2s infinite ease-in-out;
}

.brand-subtitle {
  font-size: 11px;
  font-family: var(--font-cyber);
  font-weight: 900;
  color: var(--color-neon-red);
  letter-spacing: 6px;
  text-transform: uppercase;
  opacity: 0.85;
  text-shadow: 0 0 6px var(--color-neon-red-glow);
}

/* --- Arcade Cabinet Screen Frame --- */
.arcade-cabinet {
  position: relative;
  background-color: var(--color-cyber-black);
  border: 12px solid #1a1a24;
  border-radius: 20px;
  box-shadow: 
    0 0 0 4px #121218,
    0 25px 50px -12px rgba(0, 0, 0, 0.75),
    0 0 30px var(--color-neon-green-glow);
  padding: 15px;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: all 0.3s ease;
}

/* --- HUD Panel --- */
.hud-panel {
  width: 600px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  background-color: rgba(5, 5, 8, 0.85);
  border: 2px solid var(--glass-border);
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  padding: 12px 20px;
  font-family: var(--font-arcade);
  font-size: 11px;
  color: var(--color-neon-green);
  text-shadow: 0 0 5px var(--color-neon-green-glow);
}

.hud-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.hud-item.right-aligned {
  align-items: flex-end;
}

.hud-label {
  font-size: 8px;
  color: var(--color-neon-red);
  text-shadow: 0 0 4px var(--color-neon-red-glow);
  opacity: 0.9;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hud-val {
  font-weight: bold;
}

.hud-speed {
  font-family: var(--font-cyber);
  font-weight: bold;
  font-size: 12px;
  letter-spacing: 1px;
  background: rgba(57, 255, 20, 0.1);
  padding: 4px 10px;
  border: 1px solid var(--glass-border);
  border-radius: 4px;
}

/* --- Canvas Drawing Area --- */
canvas {
  display: block;
  background-color: #050508;
  border: 2px solid var(--glass-border);
  border-radius: 0 0 8px 8px;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.9);
}

/* --- Arcade Button Dashboard --- */
.dashboard-panel {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--glass-bg);
  border: 1px dashed rgba(255, 255, 255, 0.1);
  padding: 14px 20px;
  border-radius: 12px;
  backdrop-filter: blur(10px);
}

.controls-tips {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.5;
}

.controls-tips span {
  color: var(--color-neon-green);
  font-family: var(--font-arcade);
  font-size: 8px;
}

.btn-group {
  display: flex;
  gap: 12px;
}

/* --- Mechanical Arcade Push Buttons --- */
.arcade-btn {
  font-family: var(--font-cyber);
  font-weight: bold;
  font-size: 11px;
  letter-spacing: 1px;
  color: #ffffff;
  background-color: #1c1c24;
  border: none;
  border-bottom: 4px solid #101016;
  border-radius: 6px;
  padding: 10px 18px;
  cursor: pointer;
  outline: none;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.1s ease;
  box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

.arcade-btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.1);
}

.arcade-btn:active {
  transform: translateY(3px);
  border-bottom-width: 1px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.4);
}

/* Glowing Theme Buttons */
.arcade-btn.green-glow {
  box-shadow: 0 0 10px rgba(57, 255, 20, 0.2);
  border-color: #1f640c;
  background-color: #2e8b1b;
}

.arcade-btn.green-glow:active {
  border-color: #1f640c;
}

.arcade-btn.red-glow {
  box-shadow: 0 0 10px rgba(255, 49, 49, 0.2);
  border-color: #6a1313;
  background-color: #ac2626;
}

.arcade-btn.red-glow.muted {
  background-color: #3e3e4a;
  border-color: #23232c;
  opacity: 0.65;
  box-shadow: none;
}

/* --- CRT Screen Scanlines Visual Overlay --- */
.crt-active::after {
  content: " ";
  display: block;
  position: absolute;
  top: 15px;
  left: 15px;
  right: 15px;
  bottom: 15px;
  /* Thin retro horizontal grill scanlines */
  background: linear-gradient(
    rgba(18, 16, 16, 0) 50%, 
    rgba(0, 0, 0, 0.28) 50%
  ), linear-gradient(
    90deg, 
    rgba(255, 0, 0, 0.05), 
    rgba(0, 255, 0, 0.02), 
    rgba(0, 0, 255, 0.05)
  );
  background-size: 100% 4px, 6px 100%;
  border-radius: 0 0 8px 8px; /* Match canvas border */
  z-index: 10;
  pointer-events: none;
  opacity: 0.85;
}

/* CRT Micro-flickering effect simulation */
@keyframes crt-flicker {
  0% { opacity: 0.99; }
  50% { opacity: 1; }
  100% { opacity: 0.99; }
}

.crt-active::before {
  content: " ";
  display: block;
  position: absolute;
  top: 15px; left: 15px; right: 15px; bottom: 15px;
  background: rgba(18, 16, 16, 0.08);
  opacity: 0.75;
  z-index: 9;
  pointer-events: none;
  border-radius: 0 0 8px 8px;
  animation: crt-flicker 0.15s infinite;
}

/* --- Micro-Animations --- */
@keyframes neon-pulse {
  0%, 100% {
    text-shadow: 0 0 10px var(--color-neon-green-glow);
    filter: brightness(1);
  }
  50% {
    text-shadow: 0 0 20px var(--color-neon-green-glow), 0 0 30px rgba(57, 255, 20, 0.2);
    filter: brightness(1.15);
  }
}

/* --- Responsive Adaptations --- */
@media (max-width: 650px) {
  body {
    padding: 10px;
  }
  
  .brand-title {
    font-size: 20px;
  }
  
  .arcade-cabinet {
    border-width: 6px;
    padding: 6px;
  }
  
  .hud-panel {
    width: 100%;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    font-size: 9px;
  }
  
  .hud-item.right-aligned {
    grid-column: 2;
    align-items: flex-end;
  }
  
  .hud-speed {
    grid-column: 1 / span 2;
    text-align: center;
    width: 100%;
    margin-top: 4px;
  }
  
  canvas {
    width: 100%;
    height: auto;
  }
  
  .crt-active::after,
  .crt-active::before {
    top: 6px;
    left: 6px;
    right: 6px;
    bottom: 6px;
  }
  
  .dashboard-panel {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  
  .btn-group {
    width: 100%;
    justify-content: center;
  }
}