body {
      margin: 0;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      background-color: #f9f9f9;
      color: #333;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 2rem;
    }
    h1 {
      color: #5e2bff;
    }
    textarea {
      width: 100%;
      max-width: 500px;
      height: 100px;
      padding: 1rem;
      margin: 1rem 0;
      border: 2px solid #ccc;
      border-radius: 8px;
      font-size: 1rem;
      resize: vertical;
    }
    button {
      background-color: #5e2bff;
      color: white;
      padding: 0.75rem 2rem;
      border: none;
      border-radius: 8px;
      font-size: 1rem;
      cursor: pointer;
      transition: background 0.3s ease;
    }
    button:hover {
      background-color: #431bb0;
    }
    .palette {
      display: flex;
      gap: 1rem;
      margin-top: 2rem;
      flex-wrap: wrap;
    }
    .color-box {
      width: 100px;
      height: 100px;
      border-radius: 12px;
      display: flex;
      align-items: flex-end;
      justify-content: center;
      padding: 0.5rem;
      color: white;
      font-weight: bold;
      text-shadow: 1px 1px 3px rgba(0,0,0,0.4);
      cursor: pointer;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      animation: fadeInUp 0.5s ease forwards;
      position: relative;
    }
    .color-box:hover {
      transform: scale(1.05);
      box-shadow: 0 6px 12px rgba(0,0,0,0.15);
    }
    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(20px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    .copied-notice {
      position: fixed;
      bottom: 20px;
      background: #5e2bff;
      color: #fff;
      padding: 10px 20px;
      border-radius: 8px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.2);
      font-weight: bold;
      animation: fadeOut 2s forwards;
      z-index: 1000;
    }
    @keyframes fadeOut {
      0% { opacity: 1; }
      80% { opacity: 1; }
      100% { opacity: 0; transform: translateY(10px); }
    }