/* Global Styles */
* {
  /* Reset default browser styles */
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Body Styles */
body {
  /* Set font family and color scheme */
  font-family: 'Arial', sans-serif;
  color: #fff;
  /* Gradient background for visual interest */
  background: linear-gradient(135deg, #1a1a1a, #2a2a2a);
  /* Center content horizontally and vertically */
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding-top: 90px; /* Increased to account for fixed navigation */
}

/* Main Content Styles */
main {
  /* Set maximum width and add padding for readability */
  max-width: 800px;
  width: 90%;
  background: rgba(26, 26, 26, 0.95);
  padding: 30px;
  /* Add box shadow for depth effect */
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.4);
  /* Add border radius for rounded corners */
  border-radius: 12px;
  /* Align text to the left */
  text-align: left;
  margin: 20px;
  border: 1px solid rgba(255, 215, 0, 0.1);
}

/* Heading Styles */
h1 {
  /* Set font size and color for headings */
  font-size: 2.2em;
  margin-bottom: 20px;
  color: #ffd700;
  /* Center headings horizontally */
  text-align: center;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

/* Paragraph Styles */
p {
  /* Set line height and font size for readability */
  line-height: 1.6;
  font-size: 1.1em;
  margin-bottom: 15px;
  color: #fff;
}

/* Section Styles */
section {
  /* Add margin to separate sections */
  margin: 20px 0;
}

/* Subheading Styles */
h2 {
  /* Set font size and color for subheadings */
  font-size: 1.8em;
  margin: 25px 0 15px;
  color: #ffd700;
}

h3 {
  font-size: 1.4em;
  margin: 20px 0 10px;
  color: #ffeb3b;
}

/* Unordered List Styles */
ul {
  /* Set list style and padding for readability */
  list-style: disc;
  padding-left: 20px;
  color: #fff;
}

/* List Item Styles */
li {
  /* Set margin and font size for list items */
  margin-bottom: 8px;
  font-size: 1.1em;
}

/* Animation Container Styles */
#animation-container {
  /* Set position and size for animation container */
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  /* Set background color for animation container */
  background: rgba(0, 0, 0, 0.6);
}

/* Controls Styles */
.controls {
  /* Set display and flex direction for controls */
  background: rgba(26, 26, 26, 0.95);
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  margin: 20px 0;
  max-width: 100%;
  border: 1px solid rgba(255, 215, 0, 0.1);
}

/* Label Styles */
.controls label {
  /* Set font size and margin for labels */
  display: block;
  margin: 15px 0 5px;
  color: #ffd700;
  font-weight: 500;
}

.controls input[type="range"] {
  width: 100%;
  margin: 10px 0;
  height: 8px;
  border-radius: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: #333;
}

.controls input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: #ffd700;
  border: 2px solid #fff;
  border-radius: 50%;
  cursor: pointer;
  transition: background 0.2s;
}

.controls input[type="range"]::-webkit-slider-thumb:hover {
  background: #ffeb3b;
}

.controls select {
  width: 100%;
  padding: 8px;
  margin: 5px 0;
  border: 1px solid #ffd700;
  border-radius: 4px;
  background: #1a1a1a;
  color: #ffd700;
}

/* Button Styles */
button {
  /* Set padding and margin for buttons */
  background: #ffd700;
  color: #1a1a1a;
  padding: 12px 20px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
  margin: 10px 0;
  width: 100%;
}

/* Button Hover Styles */
button:hover {
  /* Set background color for button hover effect */
  background: #ffeb3b;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Frequency Value Styles */
#freqValue {
  /* Set font weight and font size for frequency value */
  display: block;
  margin: 5px 0;
  font-weight: bold;
  color: #ffd700;
}

/* Navigation Bar Styles */
.main-nav {
    background: rgba(26, 26, 26, 0.95);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid rgba(255, 215, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo a {
    color: #ffd700;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: bold;
    transition: color 0.3s ease;
}

.nav-logo a:hover {
    color: #ffeb3b;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 30px;
    margin: 0;
    padding: 0;
}

.nav-links li a {
    color: #fff;
    text-decoration: none;
    font-size: 1rem;
    padding: 8px 12px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.nav-links li a:hover {
    background: rgba(255, 215, 0, 0.1);
    color: #ffd700;
}

.nav-links li a.active {
    background: #ffd700;
    color: #1a1a1a;
}

/* File Input Container */
.file-input-container {
  margin: 15px 0;
}

.file-input-container input[type="file"] {
  background: #1a1a1a;
  color: #fff;
  padding: 10px;
  border: 1px solid #ffd700;
  border-radius: 4px;
  width: 100%;
}

/* Slider Container */
.slider-container {
  margin: 15px 0;
}

/* Button Container */
.button-container {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.button-container button {
  flex: 1;
}

/* Select Container */
.select-container {
  margin: 15px 0;
}

/* Responsive navigation for smaller screens */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        height: auto;
        padding: 15px 20px;
    }

    .nav-links {
        flex-direction: column;
        gap: 15px;
        width: 100%;
        text-align: center;
        margin-top: 15px;
    }

    .nav-links li a {
        display: block;
        padding: 10px;
    }

    main {
        padding: 20px;
        margin: 10px;
    }

    .controls {
        padding: 15px;
    }

    h1 {
        font-size: 1.8em;
    }

    .button-container {
        flex-direction: column;
    }
}