body {
    font-family: 'Segoe UI', sans-serif;
    background: #f4f4f7;
    color: #1c1c1c;
    margin: 0;
    padding: 0;
  }
  
  .container {
    max-width: 800px;
    margin: 4rem auto;
    background: #ffffff;
    border-radius: 12px;
    padding: 3rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
  }
  
  h1 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    background-image: linear-gradient(to right, #a855f7, #6366f1);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
    text-align: center;
  }
  
  .form-group {
    margin-bottom: 1.5rem;
  }
  
  label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
  }
  
  select, input, textarea {
    width: 100%;
    padding: 0.75rem;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 8px;
    background-color: #fdfdfd;
    transition: border 0.2s;
  }
  
  select:focus, input:focus, textarea:focus {
    border-color: #6a11cb;
    outline: none;
  }
  
  .convert-btn {
    background: linear-gradient(to right, #a855f7, #6366f1);
    color: white;
    border: none;
    padding: 0.9rem 1.2rem;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
    width: 100%;
    margin-top: 1rem;
    margin-bottom: 1rem;
  }
  
  .convert-btn:hover {
    background: linear-gradient(to right, #9333ea, #4f46e5);
  }
  
  .save-log-btn {
    background: linear-gradient(to right, #6366f1, #a855f7);
    color: white;
    border: none;
    padding: 0.75rem 1.2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
    width: 100%;
    margin-bottom: 2rem;
  }
  
  .save-log-btn:hover {
    background: linear-gradient(to right, #4f46e5, #9333ea);
  }
  
  .log {
    margin-top: 3rem;
    border-top: 1px solid #ddd;
    padding-top: 1.5rem;
  }
  
  .log h2 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #444;
  }
  
  #logList {
    list-style-type: none;
    padding-left: 0;
  }
  
  #logList li {
    font-size: 0.95rem;
    color: #555;
    margin-bottom: 0.5rem;
    border-left: 4px solid #a855f7;
    padding-left: 0.5rem;
  }