/* ===== CSS 变量 ===== */
:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-bg: #eef2ff;
  --success: #059669;
  --success-bg: #ecfdf5;
  --warning: #d97706;
  --warning-bg: #fffbeb;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --info: #2563eb;
  --info-bg: #eff6ff;
  --text: #1f2937;
  --text2: #6b7280;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --border: #e5e7eb;
  --sidebar-bg: #1e1b4b;
  --sidebar-text: #c7d2fe;
  --sidebar-hover: #312e81;
  --sidebar-active: #4f46e5;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

/* 微信浏览器安全区域适配 */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.6;
  -webkit-overflow-scrolling: touch;
  -webkit-font-smoothing: antialiased;
}

/* ===== 登录遮罩 ===== */
.login-overlay {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.login-box {
  background: white;
  border-radius: 16px;
  padding: 40px;
  width: 400px;
  max-width: 90vw;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  text-align: center;
}

.login-logo {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  display: block;
}

.login-box h1 {
  font-size: 24px;
  color: var(--text);
  margin-bottom: 4px;
}

.login-sub {
  color: var(--text2);
  font-size: 13px;
  margin-bottom: 24px;
}

.login-form { text-align: left; }

.login-form .form-group { margin-bottom: 16px; }

.login-form label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 14px;
}

.login-form input, .login-form select {
  width: 100%;
  padding: 10px 12px;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  transition: border-color 0.2s;
}

.login-form input:focus, .login-form select:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

.login-copyright {
  margin-top: 24px;
  font-size: 12px;
  color: #9ca3af;
}

/* ===== 布局 ===== */
.app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  background: var(--sidebar-bg);
  color: white;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  overflow-y: auto;
}

.logo {
  padding: 20px 16px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 1px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  gap: 8px;
}

.operator-badge {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--sidebar-text);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.05);
}

.nav {
  flex: 1;
  padding: 8px 0;
}

.nav-group-title {
  padding: 12px 16px 6px;
  font-size: 11px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  letter-spacing: 1px;
  font-weight: 600;
}

.nav-item {
  display: block;
  padding: 10px 16px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s;
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background: var(--sidebar-hover);
  color: white;
}

.nav-item.active {
  background: var(--sidebar-active);
  color: white;
  border-left-color: white;
}

.main {
  flex: 1;
  margin-left: 220px;
  padding: 24px 28px;
  max-width: 1400px;
}

/* ===== 标题 ===== */
h2 {
  font-size: 22px;
  margin-bottom: 20px;
  color: var(--text);
}

h3 {
  font-size: 16px;
  margin-bottom: 12px;
  color: var(--text);
}

/* ===== 卡片 ===== */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

/* ===== 工具栏 ===== */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.search-box input {
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  width: 240px;
  transition: border-color 0.2s;
}

.search-box input:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }

.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #047857; }

.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #b91c1c; }

.btn-warning { background: var(--warning); color: white; }
.btn-warning:hover { background: #b45309; }

.btn-outline {
  background: white;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-outline:hover { background: var(--bg); border-color: #d1d5db; }

.btn-xs { padding: 4px 10px; font-size: 12px; }
.btn-block { display: block; width: 100%; }

.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* ===== 表格 ===== */
table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  background: var(--bg);
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
  font-size: 13px;
  color: var(--text2);
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}

tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

tbody tr:hover { background: var(--bg); }

tfoot td {
  padding: 10px 12px;
  font-size: 13px;
}

/* ===== 徽章 ===== */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-info { background: var(--info-bg); color: var(--info); }

/* ===== 表单 ===== */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 4px; font-size: 13px; color: var(--text); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }

/* ===== 模态框 ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  backdrop-filter: blur(2px);
}

.modal {
  background: white;
  border-radius: 12px;
  padding: 24px;
  width: 560px;
  max-width: 92vw;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.modal h3 { margin-bottom: 16px; }

.modal-body { margin-bottom: 16px; }

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 12px 24px;
  border-radius: 8px;
  color: white;
  font-weight: 500;
  z-index: 3000;
  animation: slideIn 0.3s ease;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ===== 统计卡片 ===== */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.stat-icon.inventory { background: var(--primary-bg); color: var(--primary); }

.stat-label { font-size: 13px; color: var(--text2); margin-bottom: 4px; }

.stat-value { font-size: 24px; font-weight: 700; color: var(--text); }

/* ===== 空状态 ===== */
.empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text2);
}

.empty-icon { font-size: 48px; margin-bottom: 8px; }

/* ===== 手机端适配 ===== */
@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
    flex-direction: row;
    flex-wrap: wrap;
    padding: 8px;
    overflow-x: auto;
  }
  .logo { padding: 8px 12px; font-size: 14px; border-bottom: none; }
  .operator-badge { padding: 8px 12px; font-size: 12px; border-bottom: none; }
  .nav { display: flex; flex-wrap: wrap; gap: 4px; padding: 4px; }
  .nav-group-title { display: none; }
  .nav-item { padding: 6px 10px; font-size: 12px; border-left: none; border-radius: 6px; }
  .main { margin-left: 0; padding: 12px; }
  h2 { font-size: 18px; margin-bottom: 12px; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .search-box input { width: 100%; }
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
  .stat-cards { grid-template-columns: repeat(2, 1fr); }
  .stat-card { padding: 12px; }
  .stat-value { font-size: 18px; }
  .stat-icon { width: 36px; height: 36px; font-size: 18px; }
  table { font-size: 11px; }
  thead th, tbody td { padding: 6px 4px; }
  .card { padding: 12px; }
  .modal { width: 95vw; padding: 16px; }
  .login-box { width: 95vw; padding: 24px; }
  .btn { padding: 6px 12px; font-size: 12px; }
  .btn-xs { padding: 3px 8px; font-size: 11px; }
  .card { overflow-x: auto; }
}

@media (max-width: 480px) {
  .stat-cards { grid-template-columns: 1fr 1fr; gap: 8px; }
  .stat-card { padding: 10px; gap: 8px; }
  .stat-value { font-size: 16px; }
  .stat-icon { width: 32px; height: 32px; font-size: 16px; }
  .stat-label { font-size: 11px; }
  .login-box { padding: 20px; }
  .login-box h1 { font-size: 20px; }
}