/* Mobile-First Reset */
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  body {
    
    background: #f0f9ff;
    text-align: center;
    padding: 16px;
    margin: 0;
    color: #333;
    min-height: 100vh;
    line-height: 1.5;
    -webkit-text-size-adjust: none; /* Prevent iOS font scaling */
    overflow-x: hidden; /* 🔒 Prevent horizontal scroll */
  }

  /* Container - Responsive & Centered */
  .container {
    max-width: 95%;
    width: 100%;
    margin: 16px auto;
    padding: 20px 16px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
    border: 1px solid #e2e8f0;
  }

  /* Heading */
  h1 {
    color: #2c5282;
    font-size: 1.5em;
    margin-bottom: 12px;
    font-weight: bold;
    letter-spacing: 0.5px;
  }

  /* Word Card */
  .word-card {
    margin: 24px 0;
    padding: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }

  /* Image - Responsive & Safe Max Size */
  .word-image {
    max-width: 80%;
    height: auto;
    margin: 12px auto;
    border: 4px solid #4CAF50;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    background: #f8f8f8;
  }

  /* Word Text - Big but Responsive */
  .word-text {
    font-size: 2.4em;        /* Slightly smaller for small screens */
    font-weight: bold;
    color: #d946ef;
    margin: 12px 0 0;
    letter-spacing: 4px;
    word-break: break-all;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* Buttons - Larger for Touch */
  .btn {
    background: #4CAF50;
    color: white;
    border: none;
    padding: 16px 24px;
    font-size: 1.25em;
    font-weight: bold;
    border-radius: 32px;
    cursor: pointer;
    margin: 12px 0;
    width: 90%;
    max-width: 320px;
    transition: all 0.2s ease;
    box-shadow: 0 4px 8px rgba(76, 175, 80, 0.3);
  }

  .btn:active {
    transform: scale(0.95);
    opacity: 0.9;
  }

  /* Progress Indicator */
  .progress {
    font-size: 0.9em;
    color: #666;
    margin: 16px 0;
    font-weight: normal;
  }

  /* Parent Tip Box */
  .tip {
    font-size: 0.95em;
    text-align: left;
    color: #555;
    line-height: 1.6;
    padding: 16px;
    margin: 20px auto;
    max-width: 95%;
    background: #f8fdf8;
    border-radius: 12px;
    border-left: 4px solid #4CAF50;
  }

  /* Responsive Adjustments */
  @media (min-width: 480px) {
    .container {
      max-width: 400px;
      padding: 24px;
    }
    .word-text {
      font-size: 2.8em;
    }
    .btn {
      font-size: 1.2em;
      padding: 16px 28px;
    }
  }

  @media (min-width: 600px) {
    .container {
      max-width: 440px;
    }
    .word-image {
      max-width: 220px;
    }
  }

  /* Extra Small Screens (e.g. iPhone SE) */
  @media (max-width: 360px) {
    .word-text {
      font-size: 2.1em;
      letter-spacing: 2px;
    }
    .word-image {
      max-width: 70%;
    }
    .btn {
      padding: 14px 20px;
      font-size: 1.15em;
    }
    .container {
      padding: 16px;
    }
  }