:root {
      --bg-light: #fff7f0;
      --text-light: #333;
      --btn1: #d88c63;
      --btn2: #f5b963;
      --btn3: #e88786;
      --bg-dark: #1e1e24;
      --text-dark: #f5f5f5;
      --btn-dark1: #d88c63;
      --btn-dark2: #e3a163;
      --btn-dark3: #c97373;
    }

    body {
      margin: 0;
      font-family: 'Segoe UI', sans-serif;
      background-color: var(--bg-light);
      color: var(--text-light);
      display: flex;
      flex-direction: column;
      align-items: center;
      min-height: 100vh;
      transition: background 0.3s ease, color 0.3s ease;
    }

    body.dark {
      background-color: var(--bg-dark);
      color: var(--text-dark);
    }

    .container {
      padding: 2rem;
      text-align: center;
      max-width: 600px;
      width: 100%;
    }

    h1 {
      margin-bottom: 1rem;
    }

    .group-buttons {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 1rem;
    }

    button {
      padding: 12px 24px;
      border: none;
      border-radius: 8px;
      color: white;
      font-size: 1rem;
      cursor: pointer;
      transition: transform 0.2s ease, background 0.3s ease;
    }

    button:hover {
      transform: scale(1.05);
    }

    .edit-btn {
      margin-top: 1rem;
      background: #888;
    }

    .theme-toggle {
      position: absolute;
      top: 1rem;
      right: 1rem;
      background: transparent;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
    }

    .hidden {
      display: none;
    }

    #feedbackPage {
      display: none;
      flex-direction: column;
      align-items: center;
    }

    .stars span {
      font-size: 2rem;
      cursor: pointer;
      color: #ccc;
    }

    .stars span.selected {
      color: gold;
    }

    textarea {
      width: 90%;
      height: 100px;
      margin: 1rem 0;
      font-family: monospace;
      font-size: 0.9rem;
      padding: 1rem;
      border-radius: 8px;
      border: 1px solid #ccc;
    }