:root {
  --holo-blue: #00ffff;
  --holo-green: #00ff00;
  --holo-red: #ff00ff;
  --holo-purple: #c900ff;
  --holo-orange: #ff8800;
  --holo-yellow: #ffff00;
  --bg-color: #000010;
  --panel-color: rgba(10, 15, 30, 0.9);
  --glass-blur: blur(10px);
}

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

body {
  background-color: var(--bg-color);
  color: white;
  font-family: 'Khmer OS System', sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(0, 128, 255, 0.15) 0%, transparent 30%),
    radial-gradient(circle at 90% 70%, rgba(128, 0, 255, 0.15) 0%, transparent 30%);
}

/* Typography */
h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 2px;
}

h2 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1rem;
}

/* UI Container */
#ui-container {
  background: var(--panel-color);
  border: 1px solid var(--holo-blue);
  border-radius: 10px;
  padding: 2rem;
  margin: 2rem auto;
  max-width: 90%;
  backdrop-filter: var(--glass-blur);
  box-shadow: 0 0 20px var(--holo-blue), inset 0 0 20px rgba(0, 255, 255, 0.2);
  position: relative;
  overflow: hidden;
}

#ui-container::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, transparent, var(--holo-blue), transparent);
}

/* Hologram Effects */
.holo-blue {
  color: var(--holo-blue);
  text-shadow: 0 0 10px var(--holo-blue), 0 0 20px var(--holo-blue);
}

.holo-green {
  color: var(--holo-green);
  text-shadow: 0 0 10px var(--holo-green), 0 0 20px var(--holo-green);
}

.holo-red {
  color: var(--holo-red);
  text-shadow: 0 0 10px var(--holo-red), 0 0 20px var(--holo-red);
}

.holo-purple {
  color: var(--holo-purple);
  text-shadow: 0 0 10px var(--holo-purple), 0 0 20px var(--holo-purple);
}

.holo-orange {
  color: var(--holo-orange);
  text-shadow: 0 0 10px var(--holo-orange), 0 0 20px var(--holo-orange);
}

.holo-yellow {
  color: var(--holo-yellow);
  text-shadow: 0 0 10px var(--holo-yellow), 0 0 20px var(--holo-yellow);
}

/* Tactical Layers */
section {
  background: var(--panel-color);
  border: 1px solid var(--holo-blue);
  border-radius: 10px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  backdrop-filter: var(--glass-blur);
  box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
  position: relative;
  overflow: hidden;
}

section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, currentColor, transparent);
}

#layer-threats::before { color: var(--holo-red); }
#layer-strategy::before { color: var(--holo-purple); }
#penetration-testing::before { color: var(--holo-orange); }
#solution-paths::before { color: var(--holo-green); }
#cost-estimation::before { color: var(--holo-yellow); }
#regional-summary::before { color: var(--holo-yellow); }

/* Mission Links */
#mission-links ul {
  list-style: none;
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  background: rgba(0, 255, 255, 0.1);
  border: 1px solid var(--holo-blue);
  border-radius: 20px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
  text-align: center;
  min-width: 180px;
}

.btn:hover {
  background: rgba(0, 255, 255, 0.3);
  box-shadow: 0 0 15px var(--holo-blue);
  transform: translateY(-3px);
}

.holo-blue:hover { color: white; background: var(--holo-blue); }
.holo-green:hover { color: white; background: var(--holo-green); }
.holo-red:hover { color: white; background: var(--holo-red); }
.holo-orange:hover { color: white; background: var(--holo-orange); }
.holo-yellow:hover { color: white; background: var(--holo-yellow); }

/* Status Bar */
#status-bar {
  position: absolute;
  top: 0;
  right: 0;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  background: rgba(0, 0, 0, 0.5);
  border-bottom-left-radius: 10px;
}

/* Audio Controls */
#music-toggle {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: rgba(0, 255, 255, 0.1);
  color: var(--holo-blue);
  border: 1px solid var(--holo-blue);
  border-radius: 50%;
  width: 60px;
  height: 60px;
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 100;
  box-shadow: 0 0 10px var(--holo-blue);
  transition: all 0.3s ease;
}

#music-toggle:hover {
  background: rgba(0, 255, 255, 0.3);
  transform: scale(1.1);
}

/* Equalizer Bars */
.equalizer {
  position: fixed;
  bottom: 20px;
  left: 20px;
  display: flex;
  gap: 3px;
  height: 40px;
  z-index: 100;
}

.equalizer span {
  display: inline-block;
  width: 4px;
  height: 20px;
  background: var(--holo-blue);
  border-radius: 2px;
  animation: equalize 1.5s infinite alternate;
}

.equalizer span:nth-child(2) { animation-delay: -0.5s; }
.equalizer span:nth-child(3) { animation-delay: -1s; }
.equalizer span:nth-child(4) { animation-delay: -1.5s; }

@keyframes equalize {
  0% { transform: scaleY(0.2); }
  50% { transform: scaleY(1); }
  100% { transform: scaleY(0.5); }
}

/* Holo Ring */
.holo-ring {
  position: relative;
  overflow: visible;
}

.holo-ring::after {
  content: "";
  position: absolute;
  top: -20%;
  left: -20%;
  right: -20%;
  bottom: -20%;
  border: 2px solid var(--holo-blue);
  border-radius: 50%;
  animation: pulseRing 3s infinite;
  opacity: 0.7;
}

@keyframes pulseRing {
  0% { transform: scale(0.8); opacity: 0.5; }
  50% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(1.2); opacity: 0; }
}

/* Gradient Overlay */
.gradient-overlay {
  background: linear-gradient(135deg, 
    rgba(0, 255, 255, 0.15) 0%, 
    rgba(128, 0, 255, 0.15) 100%);
}

/* Nebula Pulse */
.nebula-pulse {
  animation: nebulaGlow 5s infinite alternate;
}

@keyframes nebulaGlow {
  0% { box-shadow: 0 0 15px rgba(0, 255, 255, 0.3); }
  100% { box-shadow: 0 0 30px rgba(0, 255, 255, 0.6); }
}

/* Fog Layer */
.fog-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, 
    rgba(0, 255, 255, 0.05) 0%, 
    transparent 70%);
  pointer-events: none;
  z-index: -1;
}

/* Responsive Design */
@media (max-width: 768px) {
  #ui-container {
    padding: 1.5rem;
    margin: 1rem;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  
  #mission-links ul {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .btn {
    min-width: 100%;
  }
}