/* 全局样式 - Apple风格 */

:root {
  --primary-color: #007AFF;
  --success-color: #34C759;
  --warning-color: #FF9500;
  --danger-color: #FF3B30;
  --text-color: #000;
  --text-secondary: #666;
  --border-color: #E5E5EA;
  --bg-light: #F2F2F7;
  --bg-white: #FFFFFF;
  --bg-secondary: #F9F9F9;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.4);
}

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

html, body {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: linear-gradient(135deg, #F5F5F7 0%, #E8E8ED 100%);
  color: var(--text-color);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

/* 头部导航 - 玻璃态 */
header {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

header nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
}

header h1 {
  font-size: 24px;
  color: var(--primary-color);
}

header .nav-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

header .nav-links a {
  color: var(--text-color);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 4px;
  transition: background-color 0.3s;
}

header .nav-links a:hover {
  background-color: var(--bg-light);
}

header .nav-links a.active {
  background-color: var(--primary-color);
  color: white;
}

/* 侧边栏 - 玻璃态 */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: 250px;
  height: 100vh;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-right: 1px solid var(--glass-border);
  overflow-y: auto;
  padding-top: 20px;
  box-shadow: var(--shadow);
}

.sidebar ul {
  list-style: none;
}

.sidebar li {
  margin: 0;
}

.sidebar a {
  display: block;
  padding: 12px 20px;
  color: var(--text-color);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: all 0.3s;
}

.sidebar a:hover {
  background-color: var(--bg-light);
  border-left-color: var(--primary-color);
}

.sidebar a.active {
  background-color: var(--bg-light);
  border-left-color: var(--primary-color);
  color: var(--primary-color);
  font-weight: bold;
}

/* 主内容区 */
main {
  margin-left: 250px;
  padding-top: 20px;
  min-height: calc(100vh - 70px);
}

/* 卡片 - 玻璃态效果 */
.card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  border-width: 0.5px;
  border-color: rgba(255, 255, 255, 0.5);
}

.card h2 {
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-color);
}

.card h3 {
  margin: 15px 0 10px 0;
  color: var(--primary-color);
}

/* 表单 */
.form-group {
  margin-bottom: 15px;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: 500;
  color: var(--text-color);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 14px;
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 5px rgba(33, 150, 243, 0.3);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

/* 按钮 - Apple风格 */
button {
  padding: 10px 20px;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  box-shadow: 0 4px 15px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover {
  background-color: #0051d5;
  box-shadow: 0 6px 20px rgba(0, 122, 255, 0.4);
  transform: translateY(-2px);
}

.btn-success {
  background-color: var(--success-color);
  color: white;
  box-shadow: 0 4px 15px rgba(52, 199, 89, 0.3);
}

.btn-success:hover {
  background-color: #30B945;
  box-shadow: 0 6px 20px rgba(52, 199, 89, 0.4);
  transform: translateY(-2px);
}

.btn-danger {
  background-color: var(--danger-color);
  color: white;
  box-shadow: 0 4px 15px rgba(255, 59, 48, 0.3);
}

.btn-danger:hover {
  background-color: #E02B1F;
  box-shadow: 0 6px 20px rgba(255, 59, 48, 0.4);
  transform: translateY(-2px);
}

.btn-warning {
  background-color: var(--warning-color);
  color: white;
  box-shadow: 0 4px 15px rgba(255, 149, 0, 0.3);
}

.btn-warning:hover {
  background-color: #E08000;
  box-shadow: 0 6px 20px rgba(255, 149, 0, 0.4);
  transform: translateY(-2px);
}

button:disabled {
  background-color: #E5E5EA;
  color: #999;
  cursor: not-allowed;
  opacity: 0.6;
}

button.btn-small {
  padding: 6px 12px;
  font-size: 12px;
}

/* 表格 */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 15px;
}

table thead {
  background-color: var(--bg-light);
}

table th {
  padding: 12px;
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--border-color);
}

table td {
  padding: 12px;
  border-bottom: 1px solid var(--border-color);
}

table tr:hover {
  background-color: #f9f9f9;
}

table tr:last-child td {
  border-bottom: none;
}

/* 网格布局 */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 20px;
}

.stat-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0.5) 100%);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  padding: 20px;
  box-shadow: var(--shadow);
  text-align: center;
}

.stat-card .value {
  font-size: 32px;
  font-weight: bold;
  color: var(--primary-color);
  margin: 10px 0;
}

.stat-card .label {
  color: #666;
  font-size: 14px;
}

/* 提示信息 */
.alert {
  padding: 15px;
  margin-bottom: 20px;
  border-radius: 4px;
  border-left: 4px solid var(--border-color);
}

.alert.alert-success {
  background-color: #d4edda;
  border-left-color: var(--success-color);
  color: #155724;
}

.alert.alert-error {
  background-color: #f8d7da;
  border-left-color: var(--danger-color);
  color: #721c24;
}

.alert.alert-warning {
  background-color: #fff3cd;
  border-left-color: var(--warning-color);
  color: #856404;
}

.alert.alert-info {
  background-color: #d1ecf1;
  border-left-color: var(--primary-color);
  color: #0c5460;
}

/* 模态框 */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background-color: var(--bg-white);
  padding: 30px;
  border-radius: 8px;
  max-width: 500px;
  width: 90%;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.modal-header {
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  margin: 0;
}

.modal-footer {
  margin-top: 20px;
  padding-top: 15px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* 加载指示器 */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--bg-light);
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin: 20px 0;
}

.pagination button {
  padding: 8px 12px;
  min-width: 40px;
}

.pagination button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .sidebar {
    width: 200px;
  }

  main {
    margin-left: 200px;
  }

  header nav {
    flex-direction: column;
    gap: 10px;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  table {
    font-size: 12px;
  }

  table th, table td {
    padding: 8px;
  }

  .modal-content {
    width: 95%;
  }
}

@media (max-width: 600px) {
  .sidebar {
    display: none;
  }

  main {
    margin-left: 0;
  }

  header .nav-links {
    flex-wrap: wrap;
  }

  .container {
    padding: 10px;
  }

  .card {
    padding: 15px;
  }

  button {
    padding: 8px 16px;
    font-size: 12px;
  }

  table {
    display: block;
    overflow-x: auto;
  }
}