/* ============================================
   EduStore 全局样式
   ============================================ */

:root {
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --primary-light: #e0e7ff;
  --secondary: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-500: #6b7280;
  --gray-700: #374151;
  --gray-900: #111827;
  --radius: 12px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.6;
  min-height: 100vh;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; }

/* ---- 顶部导航 ---- */
.navbar {
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}
.navbar-brand {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.navbar-brand .logo-icon {
  width: 32px; height: 32px;
  background: var(--primary);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 18px;
}
.navbar-brand .logo-icon .ai-logo {
  font-size: 16px;
  font-weight: 400;
  letter-spacing: -0.5px;
  color: #fff;
  line-height: 1;
  font-style: normal;
  font-family: 'Arial Black', Arial, sans-serif;
}
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.navbar-nav a {
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--gray-700);
  transition: all .2s;
}
.navbar-nav a:hover, .navbar-nav a.active {
  background: var(--primary-light);
  color: var(--primary);
}
.navbar-user {
  display: flex; align-items: center; gap: 8px;
  font-size: 14px; color: var(--gray-700);
}
.navbar-user .avatar {
  width: 32px; height: 32px;
  background: var(--primary);
  border-radius: 50%;
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 600;
}
.btn-logout {
  padding: 5px 12px;
  border: 1px solid var(--gray-300);
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  background: #fff;
  color: var(--gray-700);
  transition: all .2s;
}
.btn-logout:hover { background: var(--danger); color: #fff; border-color: var(--danger); }

/* ---- 页面容器 ---- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.page-content { padding: 24px 0; }

/* ---- 按钮 ---- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all .2s;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--gray-100); color: var(--gray-700); }
.btn-secondary:hover { background: var(--gray-200); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { filter: brightness(0.9); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { filter: brightness(0.9); }
.btn-warning { background: var(--warning); color: #fff; }
.btn-sm { padding: 5px 12px; font-size: 13px; border-radius: 6px; }
.btn-outline {
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover { background: var(--primary-light); }

/* ---- 卡片 ---- */
.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--gray-100);
  display: flex; align-items: center; justify-content: space-between;
}
.card-title { font-size: 16px; font-weight: 600; }
.card-body { padding: 20px; }

/* ---- 表单 ---- */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 6px; color: var(--gray-700); }
.form-control {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color .2s;
  background: #fff;
}
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
.form-select {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  background: #fff;
  cursor: pointer;
}
.form-select:focus { border-color: var(--primary); }
.form-hint { font-size: 12px; color: var(--gray-500); margin-top: 4px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

/* ---- 表格 ---- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead tr { background: var(--gray-50); }
th { padding: 12px 16px; text-align: left; font-weight: 600; color: var(--gray-700); border-bottom: 2px solid var(--gray-200); white-space: nowrap; }
td { padding: 12px 16px; border-bottom: 1px solid var(--gray-100); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--gray-50); }
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}
.badge-success { background: #d1fae5; color: #065f46; }
.badge-danger  { background: #fee2e2; color: #991b1b; }
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-warning { background: #fef3c7; color: #92400e; }

/* ---- 搜索栏 ---- */
.search-bar {
  background: #fff;
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
}
.search-bar .form-group { margin-bottom: 0; flex: 1; min-width: 140px; }

/* ---- 应用矩阵卡片 ---- */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.app-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s;
  position: relative;
}
.app-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.app-card .cover {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  background: linear-gradient(135deg, var(--primary-light), #c7d2fe);
  display: flex; align-items: center; justify-content: center;
  font-size: 36px;
  color: var(--primary);
}
.app-card .cover img { width: 100%; height: 100%; object-fit: cover; }
.app-card .app-info { padding: 12px; }
.app-card .app-title { font-size: 14px; font-weight: 600; margin-bottom: 4px; line-height: 1.4; }
.app-card .app-meta { font-size: 12px; color: var(--gray-500); display: flex; flex-wrap: wrap; gap: 4px; }
.app-card .app-meta span {
  background: var(--gray-100); padding: 1px 6px; border-radius: 4px;
}
.app-card .fav-btn {
  position: absolute; top: 8px; right: 8px;
  width: 28px; height: 28px;
  background: rgba(255,255,255,0.9);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  cursor: pointer;
  border: none;
  transition: transform .2s;
}
.app-card .fav-btn:hover { transform: scale(1.2); }
.app-card .fav-btn.active { color: var(--danger); }

/* ---- 侧边栏布局 ---- */
.layout-sidebar {
  display: flex;
  min-height: calc(100vh - 60px);
}
.sidebar {
  width: 220px;
  background: #fff;
  border-right: 1px solid var(--gray-200);
  padding: 16px 0;
  flex-shrink: 0;
}
.sidebar-menu { list-style: none; }
.sidebar-menu li a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--gray-700);
  transition: all .2s;
  border-left: 3px solid transparent;
}
.sidebar-menu li a:hover, .sidebar-menu li a.active {
  background: var(--primary-light);
  color: var(--primary);
  border-left-color: var(--primary);
}
.sidebar-section {
  font-size: 11px;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: .05em;
  padding: 12px 20px 4px;
}
.main-content { flex: 1; padding: 24px; overflow: auto; }

/* ---- 统计卡片 ---- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: #fff;
  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.blue   { background: #dbeafe; color: #2563eb; }
.stat-icon.green  { background: #d1fae5; color: #059669; }
.stat-icon.purple { background: #ede9fe; color: #7c3aed; }
.stat-icon.orange { background: #ffedd5; color: #ea580c; }
.stat-value { font-size: 28px; font-weight: 700; line-height: 1; }
.stat-label { font-size: 13px; color: var(--gray-500); margin-top: 2px; }

/* ---- 分页 ---- */
.pagination {
  display: flex; align-items: center; gap: 6px;
  justify-content: center; margin-top: 24px;
}
.pagination a, .pagination span {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 14px;
  border: 1px solid var(--gray-200);
  background: #fff;
  color: var(--gray-700);
  transition: all .2s;
}
.pagination a:hover { background: var(--primary-light); color: var(--primary); border-color: var(--primary); }
.pagination .active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ---- 提示 ---- */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 16px;
  display: flex; align-items: center; gap: 8px;
}
.alert-success { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-danger   { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }
.alert-info     { background: #dbeafe; color: #1e40af; border: 1px solid #93c5fd; }
.alert-warning  { background: #fef3c7; color: #92400e; border: 1px solid #fcd34d; }

/* ---- 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: 1000;
  display: none;
}
.modal-overlay.show { display: flex; }
.modal {
  background: #fff;
  border-radius: var(--radius);
  width: 480px;
  max-width: 95vw;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}
.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--gray-200);
  display: flex; align-items: center; justify-content: space-between;
}
.modal-title { font-size: 16px; font-weight: 600; }
.modal-close { cursor: pointer; font-size: 20px; color: var(--gray-500); background: none; border: none; }
.modal-body { padding: 20px; }
.modal-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--gray-200);
  display: flex; gap: 8px; justify-content: flex-end;
}

/* ---- 空状态 ---- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--gray-500);
}
.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state p { font-size: 15px; }

/* ---- 登录页 ---- */
.login-page {
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex; align-items: center; justify-content: center;
}
.login-box {
  background: #fff;
  border-radius: 16px;
  padding: 40px;
  width: 400px;
  max-width: 95vw;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}
.login-logo { text-align: center; margin-bottom: 24px; }
.login-logo .logo-circle {
  width: 54px; height: 54px;
  background: var(--primary);
  border-radius: 16px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 32px; color: #fff; margin-bottom: 12px;
}
.login-logo .logo-circle .ai-logo {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
  font-family: 'Arial Black', Arial, sans-serif;
}
.login-logo h1 { font-size: 22px; font-weight: 700; color: var(--gray-900); }
.login-logo p { font-size: 14px; color: var(--gray-500); }
.login-tabs {
  display: flex; margin-bottom: 20px;
  border-bottom: 2px solid var(--gray-200);
}
.login-tab {
  flex: 1; text-align: center; padding: 10px;
  font-size: 14px; cursor: pointer; color: var(--gray-500);
  border-bottom: 2px solid transparent; margin-bottom: -2px;
  transition: all .2s;
}
.login-tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

/* ---- 响应式 ---- */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
  .apps-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .container { padding: 0 12px; }
  .modal { width: 95vw; }
}

/* ---- toast通知 ---- */
#toast-container {
  position: fixed; top: 20px; right: 20px; z-index: 9999;
  display: flex; flex-direction: column; gap: 8px;
}
.toast {
  padding: 12px 18px;
  border-radius: 8px;
  font-size: 14px;
  color: #fff;
  box-shadow: var(--shadow-lg);
  animation: slideIn .3s ease;
  min-width: 200px;
}
.toast-success { background: var(--success); }
.toast-error   { background: var(--danger); }
.toast-info    { background: var(--primary); }
@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}