.foreground-container {
  max-width: 960px;
  aspect-ratio: 4 / 3;
  margin: 0 auto;
  background-color: rgba(0, 0, 0, 0.85);
  box-shadow: 0 0 20px var(--secondary-color);
  padding: 2rem;
  position: relative;
  z-index: 1;
  border-radius: 2% / 1.5%;
  box-shadow: 0 0 40px var(--glow-color), inset 0 0 20px rgba(0, 255, 255, 0.1);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: rgba(0, 0, 0, 0.8);
  border-bottom: 2px solid var(--secondary-color);
}

header h1 {
  font-size: 2rem;
  color: var(--secondary-color);
  text-shadow: 0 0 5px var(--secondary-color);
}

nav ul {
  display: flex;
  gap: 1rem;
  list-style: none;
}

nav ul li a {
  text-decoration: none;
  color: var(--primary-color);
  padding: 0.5rem 1rem;
  border: 1px solid var(--primary-color);
  border-radius: 4px;
  text-shadow: 0 0 3px var(--primary-color);
}

nav ul li a:hover {
  background: var(--primary-color);
  color: var(--background-color);
}

.terminal {
  background: var(--terminal-background);
  border: 2px solid var(--terminal-border);
  padding: 2rem;
  width: 300px;
  margin: 2rem auto;
  box-shadow: 0 0 10px var(--terminal-border);
}

.terminal input {
  background: #1a1a1a;
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
  width: 100%;
  padding: 0.5rem;
  margin-bottom: 1rem;
  font-family: monospace;
}

.terminal button {
  background: var(--secondary-color);
  border: none;
  color: var(--background-color);
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-family: monospace;
  text-shadow: 0 0 3px var(--secondary-color);
}

#music-player {
  text-align: center;
  margin-bottom: 2rem;
}

#now-playing {
  font-family: monospace;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.controls button {
  background: var(--background-color);
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
  padding: 0.3rem 0.6rem;
  font-size: 1rem;
  cursor: pointer;
  font-family: 'Orbitron', sans-serif;
  text-shadow: 0 0 2px var(--primary-color);
  border-radius: 4px;
}

.controls button:hover {
  background: var(--primary-color);
  color: var(--background-color);
}

.music-button {
  background-color: rgba(0, 0, 0, 0.6);
  border: 1px solid var(--color-accent-cyan);
  padding: 0.3rem 0.5rem;
  margin: 0 0.2rem;
  font-size: 1.1rem;
  color: var(--color-accent-cyan);
  font-family: 'Orbitron', sans-serif;
  cursor: pointer;
  text-shadow: 0 0 2px var(--color-accent-cyan);
  box-shadow: 0 0 4px var(--color-accent-cyan),
              0 0 8px var(--color-accent-cyan);
  border-radius: 4px;
  transition: box-shadow 0.2s ease;
}

.music-button:hover {
  animation: btnflicker 0.5s linear infinite;
}

@keyframes btnflicker {
  0%, 19%, 21%, 23%, 25%, 54%, 56%, 100% {
    opacity: 1;
  }
  20%, 22%, 24%, 55% {
    opacity: 0.6;
  }
}