:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --background-color: #ecf0f1;
    --text-color: #34495e;
    --input-background: #fff;
    --input-border: #bdc3c7;
    --button-hover: #2980b9;
  }
  
  body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-color);
  }
  
  .container {
    width: 90%;
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: #fff;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
  }
  
  h1 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 2rem;
  }
  
  form {
    display: grid;
    gap: 1rem;
  }
  
  label {
    font-weight: bold;
    margin-bottom: 0.5rem;
  }
  
  input[type="text"],
  input[type="url"],
  input[type="color"],
  textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
  }
  
  input[type="text"]:focus,
  input[type="url"]:focus,
  input[type="color"]:focus,
  textarea:focus {
    outline: none;
    border-color: var(--primary-color);
  }
  
  button {
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.3s ease;
  }
  
  button:hover {
    background-color: var(--button-hover);
  }
  
  #output {
    margin-top: 2rem;
  }
  
  textarea {
    width: 100%;
    height: 200px;
    margin-bottom: 1rem;
    font-family: monospace;
  }