:root {
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --bg-color: #f3f4f6;
  --sidebar-bg: #ffffff;
  --text-color: #1f2937;
  --border-color: #e5e7eb;
  --danger-color: #ef4444;
  --warning-bg: #fef2f2;
  --warning-text: #b91c1c;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  height: 100vh;
  display: flex;
  background-color: var(--bg-color);
  color: var(--text-color);
  overflow: hidden;
}

/* Sidebar Styles */
.sidebar {
  width: 350px;
  background-color: var(--sidebar-bg);
  padding: 2rem;
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.05);
  z-index: 10;
  overflow-y: auto;
}

.sidebar h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #111827;
  margin-bottom: 0.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: #374151;
}

.form-control {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea.form-control {
  resize: vertical;
  min-height: 80px;
}

.validation-message {
  font-size: 0.8rem;
  color: var(--danger-color);
  background-color: var(--warning-bg);
  padding: 0.5rem;
  border-radius: 0.375rem;
  border: 1px solid #fecaca;
  display: none;
  /* Hidden by default */
  margin-top: 0.25rem;
}

.validation-message.visible {
  display: block;
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  margin-top: auto;
  box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: #6b7280;
  color: white;
  width: 100%;
}

.btn-secondary:hover {
  background-color: #4b5563;
}

/* Product List Styles */
.product-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1rem;
  max-height: 400px;
  overflow-y: auto;
}

.product-item {
  background: #f9fafb;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.product-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.product-item-number {
  font-weight: 600;
  color: #374151;
}

.product-item-remove {
  background: none;
  border: none;
  color: var(--danger-color);
  cursor: pointer;
  font-size: 1.25rem;
  padding: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.25rem;
  transition: background-color 0.2s;
}

.product-item-remove:hover {
  background-color: #fee2e2;
}

.product-item-input {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.product-item-input label {
  font-size: 0.75rem;
  font-weight: 500;
  color: #6b7280;
}

.product-item-input input,
.product-item-input textarea {
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  font-size: 0.875rem;
}

.product-item-input textarea {
  resize: vertical;
  min-height: 50px;
}

.product-item-validation {
  font-size: 0.75rem;
  color: var(--danger-color);
  margin-top: 0.25rem;
}


/* Preview Section Styles */
.preview-container {
  flex: 1;
  padding: 40px;
  overflow-y: auto;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

/* 
 * User's Template Styles 
 * Scoped to .paper to avoid global pollution
 */
.paper {
  background: white;
  width: 100%;
  max-width: 800px;
  /* From user CSS */
  min-height: 1100px;
  /* Approx A4 height simulation */
  padding: 40px;
  /* From user CSS */
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  font-family: "SimSun", "STSong", serif;
  /* From user CSS */
  color: #000;
  line-height: 1.6;
  position: relative;
}

.paper h1 {
  text-align: center;
  font-size: 32pt;
  letter-spacing: 10px;
  margin-bottom: 30px;
  font-weight: bold;
}

.paper .info-section {
  margin-bottom: 20px;
  font-size: 14pt;
}

.paper .info-item {
  margin-bottom: 5px;
  display: flex;
}

.paper .info-label {
  white-space: nowrap;
}

.paper table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  margin-bottom: 20px;
}

.paper th,
.paper td {
  border: 1px solid black;
  height: 40px;
  text-align: center;
  font-size: 12pt;
  word-wrap: break-word;
  padding: 5px;
}

/* Column widths from user CSS */
.paper .col-idx {
  width: 50px;
}

.paper .col-name {
  width: 120px;
}

.paper .col-model {
  width: 80px;
}

.paper .col-unit {
  width: 60px;
}

.paper .col-qty {
  width: 80px;
}

.paper .col-pkg {
  width: 100px;
}

.paper .col-remark {
  width: auto;
}

.paper .note-cell {
  text-align: left;
  padding-left: 20px;
}

.paper .footer-section {
  margin-top: 30px;
  font-size: 14pt;
}

.paper .footer-item {
  margin-bottom: 10px;
}

/* Page Settings - 移除打印页眉页脚 */
@page {
  margin: 0;
  size: A4;
}

/* Print Styles - 确保PDF导出时使用标准格式 */
@media print {
  body {
    background: white;
    overflow: visible;
  }

  /* 隐藏控制面板和浮动按钮 */
  .sidebar,
  .mobile-toggle {
    display: none !important;
  }

  .preview-container {
    padding: 0;
    overflow: visible;
  }

  /* 恢复标准A4格式 */
  .paper {
    width: 100%;
    max-width: 800px;
    padding: 40px !important;
    margin: 0 auto;
    box-shadow: none !important;
    transform: none !important;
    zoom: 1 !important;
    min-height: auto;
  }

  .paper h1 {
    font-size: 32pt !important;
    letter-spacing: 10px !important;
    margin-bottom: 30px !important;
  }

  .paper .info-section {
    font-size: 14pt !important;
    margin-bottom: 20px !important;
  }

  .paper .info-item {
    margin-bottom: 5px !important;
  }

  .paper table {
    width: 100% !important;
    display: table !important;
    table-layout: fixed !important;
    font-size: 12pt !important;
    margin-bottom: 20px !important;
    overflow: visible !important;
  }

  .paper th,
  .paper td {
    border: 1px solid black !important;
    height: 40px !important;
    padding: 5px !important;
    font-size: 12pt !important;
    white-space: normal !important;
  }

  /* 恢复标准列宽 */
  .paper .col-idx {
    width: 50px !important;
    min-width: auto !important;
  }

  .paper .col-name {
    width: 120px !important;
    min-width: auto !important;
  }

  .paper .col-model {
    width: 80px !important;
    min-width: auto !important;
  }

  .paper .col-unit {
    width: 60px !important;
    min-width: auto !important;
  }

  .paper .col-qty {
    width: 80px !important;
    min-width: auto !important;
  }

  .paper .col-pkg {
    width: 100px !important;
    min-width: auto !important;
  }

  .paper .col-remark {
    width: auto !important;
    min-width: auto !important;
  }

  .paper .note-cell {
    text-align: left !important;
    padding-left: 20px !important;
  }

  .paper .footer-section {
    font-size: 14pt !important;
    margin-top: 30px !important;
  }

  .paper .footer-item {
    margin-bottom: 10px !important;
  }
}

/* Mobile Toggle Button */
.mobile-toggle {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 12px 20px;
  border-radius: 24px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
  cursor: pointer;
  z-index: 1000;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s;
  white-space: nowrap;
}

.mobile-toggle:active {
  transform: scale(0.95);
}

/* Mobile Responsive Styles */
@media (max-width: 768px) {
  body {
    flex-direction: column;
    overflow-y: auto;
    height: auto;
    min-height: 100vh;
  }

  /* Sidebar becomes full-width and collapsible */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    max-height: 80vh;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
    transform: translateY(-100%);
    transition: transform 0.3s ease-in-out;
    z-index: 100;
  }

  .sidebar.active {
    transform: translateY(0);
  }

  .sidebar h2 {
    font-size: 1.25rem;
  }

  /* Show mobile toggle button */
  .mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* Preview container adjustments */
  .preview-container {
    padding: 20px 10px;
    margin-top: 0;
  }

  /* Paper - 使用zoom属性缩放，保持所有内部样式不变 */
  .paper {
    zoom: 0.45;
    margin: 0 auto;
  }

  /* Form controls larger touch targets */
  .form-control {
    padding: 0.875rem;
    font-size: 16px;
  }

  .btn {
    padding: 1rem 1.5rem;
    font-size: 1.125rem;
  }
}

/* Extra small devices */
@media (max-width: 480px) {
  .sidebar {
    padding: 1.5rem;
  }

  .preview-container {
    padding: 15px 5px;
  }

  .paper {
    zoom: 0.40;
  }
}

/* Very small devices (iPhone SE, etc) */
@media (max-width: 375px) {
  .paper {
    zoom: 0.37;
  }
}