/**
 * 基礎樣式
 * 提供全域樣式和 CSS 變數
 */

:root {
  /* 顏色變數 */
  --primary-color: #0891b2;
  --primary-hover: #0e7490;
  --secondary-color: #64748b;
  --success-color: #10b981;
  --danger-color: #e11d48;
  --warning-color: #f59e0b;
  --info-color: #0ea5e9;

  /* 背景顏色 */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #e2e8f0;

  /* 文字顏色 */
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;

  /* 邊框 */
  --border-color: #e2e8f0;
  --border-radius: 0.375rem;

  /* 間距 */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;

  /* 字體 */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft JhengHei', 'Noto Sans TC', sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;

  /* 陰影 */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* 全域重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
}

/* 標題 */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-2xl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }

/* 連結 */
a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--primary-hover);
}

/* 按鈕 */
button {
  font-family: inherit;
  font-size: var(--font-size-base);
  cursor: pointer;
  border: none;
  outline: none;
  transition: all 0.2s;
}

/* 輸入框 */
input, select, textarea {
  font-family: inherit;
  font-size: var(--font-size-base);
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  outline: none;
  transition: border-color 0.2s;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--primary-color);
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* 卡片 */
.card {
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

/* 工具類別 */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--primary-color); }
.text-success { color: var(--success-color); }
.text-danger { color: var(--danger-color); }
.text-warning { color: var(--warning-color); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-md { gap: var(--spacing-md); }

/* 現代化按鈕樣式 - 純色版本 */
.btn-primary,
.btn-secondary,
.btn-success,
.btn-danger,
.btn-warning,
.btn-info {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  letter-spacing: 0.02em;
}

/* Primary 按鈕 - Teal 青綠 */
.btn-primary {
  background: #0891b2;
  color: #ffffff;
}

.btn-primary:hover {
  background: #0e7490;
  box-shadow: 0 4px 8px rgba(8, 145, 178, 0.3);
  transform: translateY(-1px);
}

.btn-primary:active {
  background: #155e75;
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(8, 145, 178, 0.2);
}

/* Secondary 按鈕 - 灰色 */
.btn-secondary {
  background: #64748b;
  color: #ffffff;
}

.btn-secondary:hover {
  background: #475569;
  box-shadow: 0 4px 8px rgba(100, 116, 139, 0.25);
  transform: translateY(-1px);
}

.btn-secondary:active {
  background: #334155;
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(100, 116, 139, 0.2);
}

/* Success 按鈕 - 綠色 */
.btn-success {
  background: #10b981;
  color: #ffffff;
}

.btn-success:hover {
  background: #059669;
  box-shadow: 0 4px 8px rgba(16, 185, 129, 0.3);
  transform: translateY(-1px);
}

.btn-success:active {
  background: #047857;
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(16, 185, 129, 0.2);
}

/* Danger 按鈕 - Rose 玫瑰紅 */
.btn-danger {
  background: #e11d48;
  color: #ffffff;
}

.btn-danger:hover {
  background: #be123c;
  box-shadow: 0 4px 8px rgba(225, 29, 72, 0.3);
  transform: translateY(-1px);
}

.btn-danger:active {
  background: #9f1239;
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(225, 29, 72, 0.2);
}

/* Warning 按鈕 - 橘色 */
.btn-warning {
  background: #f59e0b;
  color: #ffffff;
}

.btn-warning:hover {
  background: #d97706;
  box-shadow: 0 4px 8px rgba(245, 158, 11, 0.3);
  transform: translateY(-1px);
}

.btn-warning:active {
  background: #b45309;
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(245, 158, 11, 0.2);
}

/* Info 按鈕 - Sky 天藍 */
.btn-info {
  background: #0ea5e9;
  color: #ffffff;
}

.btn-info:hover {
  background: #0284c7;
  box-shadow: 0 4px 8px rgba(14, 165, 233, 0.3);
  transform: translateY(-1px);
}

.btn-info:active {
  background: #0369a1;
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(14, 165, 233, 0.2);
}

/* 按鈕尺寸變化 */
.btn-sm {
  padding: 0.4rem 0.875rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1.0625rem;
}

/* 禁用狀態 */
.btn-primary:disabled,
.btn-secondary:disabled,
.btn-success:disabled,
.btn-danger:disabled,
.btn-warning:disabled,
.btn-info:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-primary:disabled:hover,
.btn-secondary:disabled:hover,
.btn-success:disabled:hover,
.btn-danger:disabled:hover,
.btn-warning:disabled:hover,
.btn-info:disabled:hover {
  transform: none;
  box-shadow: none;
}

/* 按鈕組 */
.btn-group {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* 載入動畫 */
@keyframes spin {
  to { transform: rotate(360deg); }
}

.btn-loading {
  position: relative;
  pointer-events: none;
  opacity: 0.7;
}

.btn-loading::after {
  content: '';
  position: absolute;
  width: 1rem;
  height: 1rem;
  top: 50%;
  left: 50%;
  margin-left: -0.5rem;
  margin-top: -0.5rem;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* =========================================
   RWD 響應式共用樣式
   ========================================= */

/* === Tablet (1024px) === */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
  .form-row-3 {
    grid-template-columns: 1fr 1fr;
  }
}

/* === Mobile (768px) === */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }
  .container {
    padding: 0 0.5rem;
  }
  /* Apple HIG touch target */
  button,
  .btn-primary,
  .btn-secondary,
  .btn-success,
  .btn-danger,
  .btn-warning,
  .btn-info {
    min-height: 44px;
  }
  /* 表單列堆疊 */
  .form-row,
  .form-row-3 {
    grid-template-columns: 1fr !important;
  }
  /* 按鈕組堆疊 */
  .btn-group {
    flex-direction: column;
    gap: 0.5rem;
  }
  .btn-group > * {
    width: 100%;
  }
  /* 頁面工具列 */
  .page-toolbar,
  .toolbar,
  .toolbar-row,
  .filter-bar {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.5rem !important;
  }
  /* page-header 垂直排列 */
  .page-header {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 0.75rem;
  }
  /* 表格容器水平捲動 */
  .table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  table {
    min-width: 600px;
  }
  th, td {
    padding: 0.5rem 0.4rem;
    font-size: 0.85rem;
  }
  /* Modal 全螢幕 */
  .modal-content {
    width: 98% !important;
    max-width: 100% !important;
    max-height: 95vh !important;
    border-radius: 8px !important;
  }
  .modal-header {
    padding: 1rem 1rem !important;
    font-size: 1.1rem !important;
  }
  .modal-body {
    padding: 1rem !important;
  }
  /* 縮小頁面標題 */
  h1 { font-size: 1.3rem; }
  h2 { font-size: 1.15rem; }
  h3 { font-size: 1rem; }
  /* 分頁列 */
  .pagination {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.25rem;
  }
}

/* === Small mobile (480px) === */
@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr !important;
  }
}