* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; }
:root {
  --primary: #409EFF;
  --success: #67C23A;
  --warning: #E6A23C;
  --danger: #F56C6C;
  --dark-bg: #1a1a2e;
  --card-bg: #ffffff;
  --text-primary: #303133;
  --text-regular: #606266;
  --text-secondary: #909399;
  --border: #DCDFE6;
  --bg-gray: #f5f7fa;
}
body { background: var(--bg-gray); color: var(--text-primary); }

.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.login-box {
  width: 400px;
  background: #fff;
  border-radius: 12px;
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.login-title {
  text-align: center;
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.login-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 14px;
}
.login-tabs {
  display: flex;
  border-bottom: 2px solid var(--border);
  margin-bottom: 24px;
}
.login-tab {
  flex: 1;
  padding: 12px;
  text-align: center;
  cursor: pointer;
  color: var(--text-secondary);
  font-weight: 500;
  border-bottom: 3px solid transparent;
  transition: all 0.3s;
}
.login-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.login-form input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 16px;
  outline: none;
  transition: border-color 0.3s;
}
.login-form input:focus { border-color: var(--primary); }
.login-btn {
  width: 100%;
  padding: 12px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  font-weight: 500;
  transition: background 0.3s;
}
.login-btn:hover { background: #66b1ff; }
.login-btn:disabled { background: #a0cfff; cursor: not-allowed; }

.app-header {
  background: linear-gradient(90deg, #1e3c72 0%, #2a5298 100%);
  color: #fff;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  position: sticky;
  top: 0;
  z-index: 100;
}
.app-header .logo {
  display: flex;
  align-items: center;
  font-size: 18px;
  font-weight: bold;
}
.app-header .logo-icon {
  width: 32px; height: 32px;
  background: rgba(255,255,255,0.2);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  margin-right: 10px;
  font-size: 18px;
}
.header-user {
  display: flex;
  align-items: center;
  gap: 12px;
}
.header-user .role-badge {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}
.role-admin { background: #f56c6c; }
.role-sub { background: #e6a23c; }

.app-container {
  display: flex;
  min-height: calc(100vh - 60px);
}
.app-sidebar {
  width: 220px;
  background: #fff;
  border-right: 1px solid var(--border);
  padding: 16px 0;
}
.sidebar-menu { list-style: none; }
.sidebar-item {
  padding: 12px 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-regular);
  transition: all 0.3s;
  border-left: 3px solid transparent;
}
.sidebar-item:hover { background: var(--bg-gray); color: var(--primary); }
.sidebar-item.active {
  background: #ecf5ff;
  color: var(--primary);
  border-left-color: var(--primary);
  font-weight: 500;
}
.sidebar-item .icon { font-size: 18px; }

.app-main {
  flex: 1;
  padding: 20px;
  overflow-x: hidden;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}
.stat-card {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: transform 0.2s, box-shadow 0.2s;
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.1);
}
.stat-card .label {
  color: var(--text-secondary);
  font-size: 13px;
  margin-bottom: 8px;
}
.stat-card .value {
  font-size: 26px;
  font-weight: bold;
  color: var(--text-primary);
}
.stat-card .unit {
  font-size: 14px;
  color: var(--text-secondary);
  margin-left: 4px;
}
.stat-card.primary { border-left: 4px solid var(--primary); }
.stat-card.success { border-left: 4px solid var(--success); }
.stat-card.warning { border-left: 4px solid var(--warning); }
.stat-card.danger { border-left: 4px solid var(--danger); }

.panel {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  margin-bottom: 20px;
  overflow: hidden;
}
.panel-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.panel-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}
.panel-body { padding: 20px; }

.btn {
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.3s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: #66b1ff; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #85ce61; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #f78989; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover { background: #ebb563; }
.btn-default {
  background: #fff;
  color: var(--text-regular);
  border: 1px solid var(--border);
}
.btn-default:hover { color: var(--primary); border-color: var(--primary); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 16px; }

.toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
  align-items: center;
}
.toolbar .spacer { flex: 1; }
.form-input, .form-select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  outline: none;
  background: #fff;
  min-width: 180px;
}
.form-input:focus, .form-select:focus { border-color: var(--primary); }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.data-table th {
  background: #fafafa;
  padding: 12px;
  text-align: left;
  font-weight: 600;
  color: var(--text-regular);
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}
.data-table td {
  padding: 12px;
  border-bottom: 1px solid #ebeef5;
  color: var(--text-primary);
}
.data-table tr:hover { background: #f5f7fa; }
.data-table .sortable {
  cursor: pointer;
  user-select: none;
}
.data-table .sortable:hover { color: var(--primary); }
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 12px;
}
.badge-success { background: #f0f9eb; color: var(--success); }
.badge-danger { background: #fef0f0; color: var(--danger); }
.badge-warning { background: #fdf6ec; color: var(--warning); }
.badge-info { background: #ecf5ff; color: var(--primary); }
.badge-default { background: #f4f4f5; color: #909399; }

.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal {
  background: #fff;
  border-radius: 12px;
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow: auto;
}
.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 16px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.modal-close {
  cursor: pointer;
  font-size: 20px;
  color: var(--text-secondary);
  background: none;
  border: none;
}
.modal-body { padding: 20px; }
.modal-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.form-group { margin-bottom: 16px; }
.form-label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  color: var(--text-primary);
}
.form-label .required { color: var(--danger); }
.form-group .form-input,
.form-group .form-select { width: 100%; }
.form-hint {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.game-card {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: all 0.3s;
  cursor: pointer;
  border: 2px solid transparent;
}
.game-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  border-color: var(--primary);
}
.game-card .game-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 12px;
}
.game-card .game-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.game-card .game-appid {
  font-size: 12px;
  color: var(--text-secondary);
  font-family: monospace;
}
.game-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.game-metric {
  text-align: center;
  padding: 8px;
  background: var(--bg-gray);
  border-radius: 8px;
}
.game-metric .metric-value {
  font-size: 18px;
  font-weight: bold;
  color: var(--primary);
}
.game-metric .metric-label {
  font-size: 12px;
  color: var(--text-secondary);
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
}
.pagination button {
  padding: 6px 12px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}
.pagination button.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.pagination button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.pagination .info { color: var(--text-secondary); font-size: 13px; }

.toast {
  position: fixed;
  top: 80px;
  right: 20px;
  padding: 12px 20px;
  border-radius: 8px;
  color: #fff;
  font-size: 14px;
  z-index: 2000;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  animation: slideIn 0.3s ease;
}
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-warning { background: var(--warning); }
.toast-info { background: var(--primary); }
@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.chart-container {
  height: 300px;
  padding: 16px;
}

.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px 0;
}
.checkbox-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg-gray);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}
.checkbox-item:hover { background: #ecf5ff; }
.checkbox-item input { cursor: pointer; }

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}
.empty-state .icon { font-size: 48px; margin-bottom: 16px; }
.empty-state .text { font-size: 14px; }

.text-muted { color: var(--text-secondary); }
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }

.login-footer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4px;
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-secondary);
}
.login-footer a {
  color: var(--primary);
  text-decoration: none;
  cursor: pointer;
}
.login-footer a:hover { text-decoration: underline; }

.register-title {
  text-align: center;
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

@media (max-width: 768px) {
  .app-sidebar { width: 64px; }
  .sidebar-item span:not(.icon) { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .login-box { width: 90%; padding: 24px; }
}