* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  }
  
  body {
    background: #f4f7f9;
    color: #161616;
    line-height: 1.6;
    padding: 20px;
  }
  
  /* Header */
  h1 {
    text-align: center;
    margin-bottom: 20px;
    color: #2994ff;
  }
  
  /* Navbar (puedes personalizarlo cuando lo uses) */
  #navbar {
    background-color: #898f94;
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 8px;
  }
  
  /* Main Sections */
  main {
    max-width: 800px;
    margin: 0 auto;
  }
  
  /* Section styles */
  section {
    background: #ffffff;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    display: none;
  }
  
  section.active {
    display: block;
  }
  
  h2 {
    color: #34495e;
    margin-bottom: 15px;
  }
  
  /* Form labels and inputs */
  label {
    display: block;
    margin-bottom: 10px;
    color: #555;
  }
  
  input[type="email"],
  input[type="password"],
  input[type="text"],
  input[type="url"],
  input[type="number"],
  textarea,
  select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
    margin-top: 5px;
    font-size: 1rem;
    transition: border 0.3s;
  }
  
  input:focus,
  textarea:focus,
  select:focus {
    border-color: #3498db;
    outline: none;
  }
  
  /* Buttons */
  button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 10px 15px;
    margin: 10px 5px 0 0;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.3s ease;
  }
  
  button:hover {
    background-color: #206a9b;
  }
  
  button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
  }
  
  /* Links */
  a {
    color: #ff0000;
    text-decoration: none;
  }
  
  a:hover {
    text-decoration: underline;
  }
  
  /* Responsive tweaks */
  @media (max-width: 600px) {
    body {
      padding: 10px;
    }
  
    button {
      width: 100%;
      margin-bottom: 10px;
    }
  
    label {
      margin-bottom: 15px;
    }
  }