style.css

/* style.css */
* {
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f5f7fa;
  color: #333;
  line-height: 1.6;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 800px;
  margin: 2rem auto;
  padding: 2rem;
  background-color: white;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  color: #2c3e50;
  margin-bottom: 0.5rem;
}

p {
  text-align: center;
  color: #7f8c8d;
  margin-bottom: 1.5rem;
}

.controls,
.options {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  color: #2c3e50;
  font-weight: 500;
}

input[type='file'] {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #bdc3c7;
  border-radius: 8px;
  background-color: #fdfefe;
  font-size: 1rem;
}

button {
  background-color: #3498db;
  color: white;
  border: none;
  padding: 0.75rem 1.25rem;
  margin-right: 0.5rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  transition: background-color 0.3s ease;
  margin-top: 0.5rem;
}

button:hover:not(:disabled) {
  background-color: #2980b9;
}

button:disabled {
  background-color: #95a5a6;
  cursor: not-allowed;
}

.options {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.audio-player {
  margin: 1.5rem 0;
}

audio {
  width: 100%;
}

.output {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: 8px;
  background-color: #f8f9fa;
  min-height: 60px;
  word-break: break-word;
}

.spinner {
  text-align: center;
  color: #3498db;
  font-style: italic;
}

.error {
  color: #e74c3c;
}

ul {
  list-style-type: none;
  padding-left: 0;
}

li {
  background: #ecf0f1;
  margin: 0.4rem 0;
  padding: 0.6rem;
  border-radius: 6px;
  border-left: 4px solid #3498db;
}

@media (max-width: 600px) {
  .container {
    padding: 1.5rem;
    margin: 1rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  button {
    width: 100%;
    margin-bottom: 0.5rem;
  }

  .options {
    flex-direction: column;
    align-items: flex-start;
  }
}