/* ==========================================================================
   whiteboard.css - 電子白板大螢幕模式與 A4 黑白列印樣式表
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 電子白板模式 (Whiteboard / Smart Board Touch Mode)
   -------------------------------------------------------------------------- */
body.whiteboard-mode {
  font-size: 24px !important;
  background-color: #f1f5f9;
}

body.whiteboard-mode .app-header {
  padding: 18px 30px;
}

body.whiteboard-mode .brand-title {
  font-size: 2rem;
}

body.whiteboard-mode .card {
  padding: 36px;
  border: 3px solid #64748b;
  border-radius: 24px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

body.whiteboard-mode .card-title {
  font-size: 1.8rem;
}

body.whiteboard-mode .btn-primary,
body.whiteboard-mode .btn-secondary,
body.whiteboard-mode .btn-success {
  padding: 16px 36px;
  font-size: 1.4rem;
  border-radius: 18px;
}

body.whiteboard-mode .sped-input {
  width: 120px;
  height: 72px;
  font-size: 2.2rem;
  border-width: 4px;
}

body.whiteboard-mode .unit-tag {
  font-size: 1.5rem;
  padding: 8px 20px;
  border-width: 3px;
}

body.whiteboard-mode .key-btn {
  height: 80px;
  font-size: 2.2rem;
}

body.whiteboard-mode .virtual-keypad {
  grid-template-columns: repeat(3, 96px);
  gap: 14px;
  padding: 18px;
}

/* --------------------------------------------------------------------------
   2. A4 黑白學習單列印樣式 (@media print)
   符合特教複印需求：純黑白、無底色耗墨、高清晰網格、大字、留白充裕
   -------------------------------------------------------------------------- */
@media print {
  @page {
    size: A4 portrait;
    margin: 12mm 15mm;
  }

  /* 隱藏所有互動元件、頁首、頁尾、工具列、按鈕 */
  .app-header,
  .nav-tabs,
  .tier-selector,
  .header-controls,
  .tts-btn,
  .btn-primary,
  .btn-secondary,
  .btn-success,
  .btn-ctrl,
  .app-footer,
  .virtual-keypad-container,
  .interactive-tools-panel,
  .no-print {
    display: none !important;
  }

  /* 強制還原白底黑字 */
  body, html {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 14pt !important;
    line-height: 1.5 !important;
  }

  .main-container {
    max-width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
    min-height: auto !important;
  }

  /* 僅顯示列印專用學習單容器 */
  .print-worksheet-area {
    display: block !important;
  }

  .tab-content:not(#tab-worksheet) {
    display: none !important;
  }

  #tab-worksheet {
    display: block !important;
  }

  .print-header {
    border-bottom: 2px solid #000000;
    padding-bottom: 8px;
    margin-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
  }

  .print-title {
    font-size: 18pt !important;
    font-weight: bold;
    color: #000000 !important;
  }

  .print-meta {
    font-size: 11pt;
    display: flex;
    gap: 20px;
  }

  /* 黑白題目卡 */
  .print-problem-card {
    border: 1.5px solid #000000 !important;
    border-radius: 8px;
    padding: 14px 18px;
    margin-bottom: 18px;
    page-break-inside: avoid;
  }

  .print-problem-title {
    font-weight: bold;
    font-size: 13pt;
    margin-bottom: 8px;
  }

  /* 步驟式黑白填空網格 */
  .print-calc-grid {
    display: flex;
    gap: 24px;
    margin-top: 12px;
  }

  .print-grid-box {
    border: 1.5px dashed #000000;
    width: 60px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 14pt;
  }

  /* 黑白皮克斯小提醒框 */
  .print-hint-box {
    border: 1px solid #666666;
    background: #f9f9f9 !important;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 10pt;
    margin-top: 8px;
  }
}