* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

:root {
  --sky-blue: #00c4ff;
  --sky-pink: #ff005e;
  --sky-green: #00ffb3;
  --sky-blue-light: rgba(0, 196, 255, 0.1);
  --sky-pink-light: rgba(255, 0, 94, 0.1);
  --sky-green-light: rgba(0, 255, 179, 0.1);
  --light-bg: #ffffff;
  --card-bg: #f8f9fa;
  --card-hover: #f1f3f4;
  --text-primary: #202124;
  --text-secondary: #5f6368;
  --text-tertiary: #9aa0a6;
  --border-light: #dadce0;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.12);
  --dark-bg: #1a1a1a;
  --darker-bg: #0f0f0f;
}

body {
  background: var(--light-bg);
  color: var(--text-primary);
  line-height: 1;
  padding: 10px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 70px;
}

/* Hero Section */
.hero-section {
  text-align: center;
  margin-bottom: 20px;
  padding: 10px 0;
}

.hero-section h1 {
  font-size: 1.5rem;
  margin-bottom: 10px;
  background: linear-gradient(90deg, var(--sky-blue), var(--sky-pink), var(--sky-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.hero-section p {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 1000px;
  margin: 0 auto;
}

.gradient-bar {
  height: 3px;
  width: 300px;
  background: linear-gradient(90deg, var(--sky-blue), var(--sky-pink), var(--sky-green));
  margin: 10px auto 15px;
  border-radius: 2px;
}

/* Upload Section */
.upload-section {
  margin: 30px 0;
  text-align: center;
}

.upload-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--card-bg);
  border: 2px dashed var(--sky-green);
  border-radius: 12px;
  padding: 40px 20px;
  cursor: pointer;
  transition: all 0.3s ease;
  min-height: 200px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.upload-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--sky-blue), var(--sky-pink), var(--sky-green));
}

.upload-box:hover {
  background: var(--sky-green-light);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.upload-icon {
  font-size: 48px;
  margin-bottom: 15px;
  color: var(--sky-green);
  transition: all 0.3s ease;
}

.upload-box:hover .upload-icon {
  color: var(--sky-pink);
  transform: scale(1.1);
}

.upload-content p {
  margin: 5px 0;
  font-size: 1.1rem;
}

.upload-content strong {
  color: var(--text-primary);
}

.upload-content small {
  color: var(--text-tertiary);
  font-size: 0.9rem;
}

#audioFile {
  display: none;
}

/* Upload Button Style */
.upload-button {
  display: inline-block;
  margin-top: 15px;
  padding: 12px 30px;
  background: linear-gradient(90deg, var(--sky-green), var(--sky-blue));
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.upload-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--sky-blue), var(--sky-pink), var(--sky-green));
  transition: left 0.5s ease;
  z-index: -1;
}

.upload-button:hover::before {
  left: 0;
}

.upload-button:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

/* Preview Section */
.preview-section {
  margin: 40px 0;
}

.preview-container {
  background: var(--card-bg);
  padding: 30px;
  border-radius: 12px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow);
}

.audio-player {
  max-width: 600px;
  margin: 0 auto 30px;
}

.audio-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.audio-info h3 {
  color: var(--text-primary);
  font-size: 1.2rem;
}

.audio-duration {
  color: var(--text-secondary);
  font-weight: 600;
}

.audio-controls {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-bottom: 20px;
}

.control-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: none;
  background: var(--sky-green);
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
}

.control-btn:hover {
  background: var(--sky-blue);
  transform: scale(1.05);
  box-shadow: var(--shadow-hover);
}

.control-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.progress-container {
  margin-top: 15px;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--border-light);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 10px;
}

.progress {
  height: 100%;
  background: linear-gradient(90deg, var(--sky-green), var(--sky-blue));
  border-radius: 4px;
  width: 0%;
  transition: width 0.1s linear;
}

.time-display {
  display: flex;
  justify-content: space-between;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Waveform Preview */
.waveform-preview {
  text-align: center;
}

.waveform-preview h4 {
  margin-bottom: 15px;
  color: var(--text-primary);
  font-size: 1.1rem;
}

#liveWaveform {
  border-radius: 8px;
  background: var(--dark-bg);
  border: 1px solid var(--border-light);
  margin-bottom: 10px;
}

.preview-info {
  display: flex;
  justify-content: center;
  gap: 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

/* Settings Section */
.settings-section {
  margin: 40px 0;
}

.settings-container {
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow);
  overflow: hidden;
}

/* Settings Tabs */
.settings-tabs {
  display: flex;
  background: var(--light-bg);
  border-bottom: 1px solid var(--border-light);
}

.tab-button {
  flex: 1;
  padding: 15px 20px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  border-bottom: 3px solid transparent;
}

.tab-button:hover {
  color: var(--text-primary);
  background: var(--card-hover);
}

.tab-button.active {
  color: var(--sky-blue);
  border-bottom-color: var(--sky-blue);
  background: var(--sky-blue-light);
}

.tab-content {
  padding: 30px;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.setting-group {
  background: var(--light-bg);
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--border-light);
}

.setting-group h3 {
  margin-bottom: 15px;
  color: var(--text-primary);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.setting-group h3 i {
  color: var(--sky-blue);
}

/* Style Options */
.style-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.style-option input {
  display: none;
}

.style-option label {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 15px;
  border: 2px solid var(--border-light);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
}

.style-option input:checked + label {
  border-color: var(--sky-green);
  background: var(--sky-green-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.style-option label:hover {
  border-color: var(--sky-blue);
  transform: translateY(-2px);
}

.style-preview {
  width: 100%;
  height: 60px;
  background: var(--dark-bg);
  border-radius: 4px;
  margin-bottom: 10px;
  position: relative;
  overflow: hidden;
}

.style-preview[data-style="bars"]::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, 
    transparent 0%, var(--sky-blue) 10%, 
    transparent 20%, var(--sky-blue) 30%,
    transparent 40%, var(--sky-blue) 50%,
    transparent 60%, var(--sky-blue) 70%,
    transparent 80%, var(--sky-blue) 90%,
    transparent 100%
  );
}

.style-preview[data-style="line"]::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--sky-blue);
  transform: translateY(-50%);
}

.style-preview[data-style="gradient"]::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, 
    transparent 0%, var(--sky-blue) 50%, transparent 100%);
}

.style-preview[data-style="mirror"]::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    linear-gradient(to bottom, transparent 0%, var(--sky-blue) 50%, transparent 50%, var(--sky-blue) 100%);
}

.style-info strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.style-info small {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* Color Options */
.color-options {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.color-presets h4, .custom-colors h4 {
  margin-bottom: 10px;
  color: var(--text-primary);
  font-size: 1rem;
}

.preset-colors {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
}

.color-preset {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px;
  border: 2px solid var(--border-light);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.color-preset:hover {
  border-color: var(--sky-blue);
  transform: translateY(-2px);
}

.color-preset.active {
  border-color: var(--sky-green);
  background: var(--sky-green-light);
}

.color-swatch {
  width: 60px;
  height: 40px;
  border-radius: 4px;
  margin-bottom: 5px;
  border: 1px solid var(--border-light);
}

.color-preset span {
  font-size: 0.8rem;
  color: var(--text-primary);
  font-weight: 500;
}

.custom-colors {
  margin-top: 15px;
}

.color-controls {
  display: grid;
  grid-template-columns: 1fr;
  gap: 15px;
}

.color-input {
  display: flex;
  align-items: center;
  gap: 10px;
}

.color-input label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9rem;
  min-width: 120px;
}

.color-input input[type="color"] {
  width: 50px;
  height: 40px;
  border: 2px solid var(--border-light);
  border-radius: 6px;
  cursor: pointer;
}

/* Display Controls */
.display-controls {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.slider-control {
  display: flex;
  align-items: center;
  gap: 15px;
}

.slider-control label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9rem;
  min-width: 140px;
}

.slider-control input[type="range"] {
  flex: 1;
  height: 6px;
  background: var(--border-light);
  border-radius: 3px;
  outline: none;
  -webkit-appearance: none;
}

.slider-control input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--sky-green);
  cursor: pointer;
  box-shadow: var(--shadow);
}

.slider-control span {
  font-weight: 600;
  color: var(--text-primary);
  min-width: 60px;
  text-align: right;
}

.checkbox-controls {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 10px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-weight: 500;
  color: var(--text-primary);
  padding: 5px 0;
}

.checkbox-label input {
  display: none;
}

.checkmark {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-light);
  border-radius: 4px;
  position: relative;
  transition: all 0.3s ease;
}

.checkbox-label input:checked + .checkmark {
  background: var(--sky-green);
  border-color: var(--sky-green);
}

.checkbox-label input:checked + .checkmark::after {
  content: '✓';
  position: absolute;
  color: white;
  font-size: 12px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* Format Options */
.format-options {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.format-option input {
  display: none;
}

.format-option label {
  display: flex;
  align-items: flex-start;
  padding: 20px;
  border: 2px solid var(--border-light);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  gap: 15px;
}

.format-option input:checked + label {
  border-color: var(--sky-green);
  background: var(--sky-green-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.format-option label:hover {
  border-color: var(--sky-blue);
  transform: translateY(-2px);
}

.format-icon {
  font-size: 2rem;
  color: var(--sky-blue);
  width: 40px;
  display: flex;
  justify-content: center;
}

.format-info {
  flex: 1;
}

.format-info strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text-primary);
  font-size: 1.1rem;
}

.format-info small {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.format-settings {
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px solid var(--border-light);
}

.setting-item {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.setting-item label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9rem;
  min-width: 100px;
}

.setting-item select {
  padding: 8px 12px;
  border: 2px solid var(--border-light);
  border-radius: 6px;
  background: var(--light-bg);
  color: var(--text-primary);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.setting-item select:hover {
  border-color: var(--sky-blue);
}

.setting-item select:focus {
  outline: none;
  border-color: var(--sky-green);
}

/* Export Controls */
.export-controls {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.export-controls .setting-item {
  justify-content: space-between;
}

.export-controls input[type="text"] {
  padding: 8px 12px;
  border: 2px solid var(--border-light);
  border-radius: 6px;
  background: var(--light-bg);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: all 0.3s ease;
  flex: 1;
}

.export-controls input[type="text"]:hover {
  border-color: var(--sky-blue);
}

.export-controls input[type="text"]:focus {
  outline: none;
  border-color: var(--sky-green);
}

/* Advanced Controls */
.advanced-controls, .spectrogram-controls, .performance-controls {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.spectrogram-settings {
  margin-top: 15px;
  padding: 15px;
  background: var(--card-bg);
  border-radius: 6px;
  border: 1px solid var(--border-light);
}

/* Waveform Preview Section */
.waveform-preview-section {
  margin: 40px 0;
}

.preview-container {
  background: var(--card-bg);
  padding: 30px;
  border-radius: 12px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow);
}

.preview-wrapper {
  text-align: center;
  margin-bottom: 20px;
}

#waveformCanvas {
  border-radius: 8px;
  background: var(--dark-bg);
  border: 1px solid var(--border-light);
  max-width: 100%;
  margin-bottom: 15px;
}

.preview-controls {
  display: flex;
  justify-content: center;
  gap: 15px;
}

.preview-btn {
  padding: 10px 20px;
  border: 2px solid var(--sky-blue);
  background: transparent;
  color: var(--sky-blue);
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.preview-btn:hover {
  background: var(--sky-blue);
  color: white;
}

.preview-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 15px;
  padding: 20px;
  background: var(--light-bg);
  border-radius: 8px;
  border: 1px solid var(--border-light);
}

.stat-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light);
}

.stat-item:last-child {
  border-bottom: none;
}

.stat-label {
  color: var(--text-secondary);
  font-weight: 500;
}

.stat-value {
  color: var(--text-primary);
  font-weight: 600;
}

/* Buttons Section */
.buttons-section {
  text-align: center;
  margin: 40px 0;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 15px;
  flex-wrap: wrap;
}

.action-button {
  padding: 15px 40px;
  border: none;
  background: linear-gradient(90deg, var(--sky-green), var(--sky-blue));
  color: white;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 600;
  font-size: 1.1rem;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.action-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--sky-blue), var(--sky-pink), var(--sky-green));
  transition: left 0.5s ease;
  z-index: -1;
}

.action-button:hover::before {
  left: 0;
}

.action-button:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.reset-button {
  padding: 15px 40px;
  border: 2px solid var(--sky-pink);
  background: transparent;
  color: var(--sky-pink);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 600;
  font-size: 1.1rem;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
  z-index: 1;
  margin-left: 15px;
}

.reset-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--sky-pink);
  transition: left 0.5s ease;
  z-index: -1;
}

.reset-button:hover::before {
  left: 0;
}

.reset-button:hover {
  color: white;
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

/* Results Section */
.results-section {
  margin: 40px 0;
}

.results-container {
  background: var(--light-bg);
  border-radius: 12px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border-light);
  font-weight: 600;
  color: var(--text-primary);
}

.results-actions {
  display: flex;
  gap: 10px;
}

.action-btn {
  padding: 8px 15px;
  border: 1px solid var(--sky-blue);
  background: transparent;
  color: var(--sky-blue);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

.action-btn:hover {
  background: var(--sky-blue);
  color: white;
}

.results-content {
  padding: 25px;
}

.result-preview {
  text-align: center;
  margin-bottom: 25px;
}

.video-result, .image-result {
  max-width: 800px;
  margin: 0 auto;
}

#generatedVideo, #generatedImage {
  border-radius: 8px;
  box-shadow: var(--shadow-hover);
}

.result-info {
  background: var(--card-bg);
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--border-light);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 15px;
}

.info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light);
}

.info-item:last-child {
  border-bottom: none;
}

.info-label {
  color: var(--text-secondary);
  font-weight: 500;
}

.info-value {
  color: var(--text-primary);
  font-weight: 600;
}

.results-stats {
  display: flex;
  justify-content: space-around;
  padding: 15px 20px;
  background: var(--card-bg);
  border-top: 1px solid var(--border-light);
  font-weight: 600;
  color: var(--text-primary);
  flex-wrap: wrap;
  gap: 15px;
}

/* Use Cases Section */
.use-cases-section {
  margin: 50px 0;
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.use-case-card {
  background: var(--light-bg);
  padding: 25px 20px;
  border-radius: 12px;
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.use-case-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--sky-blue), var(--sky-pink), var(--sky-green));
}

.use-case-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.use-case-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
  color: var(--sky-green);
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.use-case-card:hover .use-case-icon {
  color: var(--sky-pink);
  transform: scale(1.05);
}

.use-case-card h3 {
  margin-bottom: 12px;
  color: var(--text-primary);
  font-size: 1.2rem;
  font-weight: 600;
}

.use-case-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.4;
}

/* Steps Section */
.steps-section {
  margin: 50px 0;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.step-card {
  background: var(--light-bg);
  padding: 25px 20px;
  border-radius: 12px;
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.step-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--sky-blue), var(--sky-pink), var(--sky-green));
}

.step-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.step-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
  color: var(--sky-green);
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.step-card:hover .step-icon {
  color: var(--sky-pink);
  transform: scale(1.05);
}

.step-card h3 {
  margin-bottom: 12px;
  color: var(--text-primary);
  font-size: 1.2rem;
  font-weight: 600;
}

.step-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.4;
}

/* FAQ Section */
.faq-section {
  margin: 50px 0;
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--light-bg);
  margin-bottom: 12px;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.faq-item:hover {
  background: var(--card-hover);
}

.faq-question {
  padding: 18px 20px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.faq-question:hover {
  color: var(--sky-green);
}

.faq-question i {
  transition: transform 0.3s ease;
  color: var(--sky-pink);
}

.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  color: var(--text-secondary);
  line-height: 1.5;
  font-size: 0.9rem;
}

.faq-item.active .faq-answer {
  padding: 0 20px 18px;
  max-height: 500px;
}

.faq-item.active .faq-question i {
  transform: rotate(45deg);
}

/* Animation for page load */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeInUp 0.5s ease forwards;
}

/* Section Title */
.section-title {
  font-size: 1.8rem;
  text-align: center;
  margin: 40px 0 30px;
  position: relative;
  color: var(--text-primary);
  font-weight: 600;
}

.section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--sky-blue), var(--sky-pink), var(--sky-green));
  margin: 15px auto 0;
  border-radius: 2px;
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 10px;
  }
  
  .hero-section h1 {
    font-size: 1.7rem;
  }
  
  .section-title {
    font-size: 1.5rem;
    margin: 30px 0 20px;
  }
  
  .settings-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .style-options {
    grid-template-columns: 1fr;
  }
  
  .preset-colors {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  }
  
  .use-cases-grid,
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }
  
  .preview-container,
  .settings-container {
    padding: 20px 15px;
  }
  
  .settings-tabs {
    flex-direction: column;
  }
  
  .tab-button {
    padding: 12px 15px;
  }
  
  .format-option label {
    flex-direction: column;
    text-align: center;
  }
  
  .format-icon {
    margin-bottom: 10px;
  }
  
  .slider-control {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  
  .slider-control label {
    min-width: auto;
  }
  
  .slider-control span {
    text-align: left;
  }
  
  .color-input {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  
  .color-input label {
    min-width: auto;
  }
  
  .setting-item {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  
  .results-header {
    flex-direction: column;
    gap: 15px;
    text-align: center;
  }
  
  .results-actions {
    width: 100%;
    justify-content: center;
  }
  
  .results-stats {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }
  
  .info-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-section h1 {
    font-size: 1.5rem;
  }
  
  .hero-section p {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 1.3rem;
  }
  
  .step-card, .use-case-card {
    padding: 20px 15px;
  }
  
  .action-button, .reset-button {
    width: 100%;
    padding: 15px;
  }
  
  .reset-button {
    margin-left: 0;
  }
  
  #waveformCanvas, #liveWaveform {
    width: 100%;
    height: auto;
  }
  
  .preview-controls {
    flex-direction: column;
  }
  
  .preview-btn {
    width: 100%;
    justify-content: center;
  }
}