:root {
  --primary-bg: #0d0d0d;
  --secondary-bg: #1a1a1a;
  --primary-text: #f0f0f0;
  --accent-red: #ff3333;
  --accent-red-hover: #ff6666;
  --border-color: #2c2c2c;
  --glow-shadow: 0 0 10px rgba(255, 51, 51, 0.6);
  --font-main: "Raleway", sans-serif;
  --font-secondary: "Poppins", sans-serif;
}
/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--secondary-bg);
}

::-webkit-scrollbar-thumb {
  background-color: var(--accent-red);
  border-radius: 10px;
  border: 2px solid transparent;
}

body {
  font-family: var(--font-main);
  font-weight: 300;
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  background-color: var(--primary-bg);
  color: var(--primary-text);
  background: linear-gradient(135deg, var(--primary-bg), var(--secondary-bg), var(--primary-bg));
  background-size: 300% 300%;
  animation: gradient-animation 25s ease infinite
  overflow: auto; 
  height: auto;
}

@keyframes gradient-shift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.container {
  padding: 40px;
  background-color: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: 0 0 25px rgba(0, 0, 0, 0.4);
  max-width: 90%;
  width: 500px;
  position: relative;
  z-index: 1;
  /* Animation for the container itself */
  animation: fadeIn 1s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

h1 {
  font-family: 'LED Dot-Matrix', sans-serif;
  font-weight: 300;
  color: var(--accent-red);
  text-shadow: 0 0 3px var(--accent-red);
  margin-bottom: 25px;
  letter-spacing: 2px;
}

input,
select,
button {
  font-family: var(--font-main);
  font-weight: 300;
  font-size: 16px;
  padding: 12px;
  margin: 10px 0;
  width: 100%;
  box-sizing: border-box; /* Ensures padding doesn't affect width */
  background-color: transparent;
  color: var(--primary-text);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: all 0.3s ease;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--accent-red);
  box-shadow: var(--glow-shadow);
}

button {
  cursor: pointer;
  background-color: var(--accent-red);
  border: none;
  color: var(--primary-text);
  box-shadow: 0 0 5px rgba(255, 51, 51, 0.4);
  text-transform: uppercase;
  letter-spacing: 1px;
}

button:hover {
  background-color: var(--accent-red-hover);
  box-shadow: var(--glow-shadow);
  transform: scale(1.02);
}

#output {
  margin-top: 30px;
  padding: 20px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  min-height: 50px;
  text-align: left;
  background-color: var(--secondary-bg);
}

#audioPlayer {
  width: 100%;
  margin-top: 20px;
  transition: all 0.3s ease-in-out;
}

#audioPlayer::-webkit-media-controls-panel {
  background-color: #ffffff;
  border-radius: 10px;
  color: white;
}

#audioPlayer::-webkit-media-controls-play-button,
#audioPlayer::-webkit-media-controls-volume-slider {
  filter: hue-rotate(180deg) contrast(120%);
}

#audioPlayer:hover {
  transform: scale(1.02);
}

#checkUsageBtn {
  margin-top: 20px;
}

#usageStatus {
  margin-top: 10px;
  font-weight: 600;
  color: var(--accent-red);
  text-shadow: 0 0 1px var(--accent-red);
  font-family: "Poppins", sans-serif;
}

#spectrogramCanvas {
  width: 100%;
  max-width: 800px;
  height: 300px;
  background-color: black;
  display: block;
  margin: 30px auto;
  border-radius: 10px;
}

#audioMixer {
  margin-top: 40px;
  padding: 30px;
  background-color: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.4);
  transition: all 0.3s ease-in-out;
  animation: fadeIn 1s ease-out;
}

#audioMixer h2 {
  font-family: 'LED Dot-Matrix', sans-serif;
  font-weight: 300;
  color: var(--accent-red);
  text-shadow: 0 0 2px var(--accent-red);
  margin-bottom: 20px;
  letter-spacing: 1px;
}

#audioMixer input[type="file"],
#audioMixer select,
#audioMixer button {
  margin-bottom: 15px;
}

#audioMixer label {
  display: block;
  text-align: left;
  font-weight: 400;
  margin-bottom: 6px;
  color: var(--primary-text);
}

#resetBtn {
  margin-top: 10px;
  background-color: #ff3333;
  color: white;
  padding: 10px 15px;
  font-size: 14px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

#resetBtn:hover {
  background-color: #ff6666;
}


#audioMixerEffects {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 20px;
}

#audioMixerEffects select,
#audioMixerEffects input[type="range"] {
  width: 100%;
}

#audioMixer audio {
  margin-top: 20px;
  width: 100%;
  border-radius: 8px;
}

#audioMixer audio:hover {
  transform: scale(1.01);
}


/* Responsive adjustments */
@media (max-width: 600px) {
  .container {
    padding: 25px;
  }
}