/* ============================================
   商家后台管理系统 — 全局样式
   设计规范：主色 #DC2626 / 背景 #F8FAFC / 暗色侧边栏 #1E293B
   ============================================ */

/* ========== CSS Variables ========== */
:root {
  --color-primary: #DC2626;
  --color-primary-hover: #B91C1C;
  --color-primary-light: #FEE2E2;
  --color-primary-50: #FEF2F2;
  --color-primary-600: #DC2626;
  --color-primary-700: #B91C1C;

  --color-bg: #F8FAFC;
  --color-bg-alt: #F1F5F9;
  --color-surface: #FFFFFF;
  --color-surface-hover: #F8FAFC;

  --color-sidebar: #1E293B;
  --color-sidebar-hover: #334155;
  --color-sidebar-active: #DC2626;

  --color-text: #0F172A;
  --color-text-secondary: #64748B;
  --color-text-muted: #94A3B8;
  --color-text-inverse: #FFFFFF;

  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;

  --color-success: #10B981;
  --color-success-light: #D1FAE5;
  --color-warning: #F59E0B;
  --color-warning-light: #FEF3C7;
  --color-danger: #EF4444;
  --color-danger-light: #FEE2E2;
  --color-info: #3B82F6;
  --color-info-light: #DBEAFE;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);

  --radius-sm: 6px;
  --radius: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;

  --sidebar-width: 240px;
  --topbar-height: 64px;

  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

/* ========== Reset ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  font-family: var(--font-family);
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { text-decoration: none; color: inherit; }
button { cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }

/* ========== Login Page ========== */
.login-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1E293B 0%, #334155 100%);
  z-index: 1000;
}

.login-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 400px;
  max-width: 90vw;
  box-shadow: var(--shadow-lg);
}

.login-header {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo {
  margin: 0 auto 16px;
  width: fit-content;
}

.login-header h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
}

.login-header p {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.login-form .form-group {
  margin-bottom: 20px;
}

.login-form label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.login-form input {
  width: 100%;
  height: 44px;
  padding: 0 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 15px;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.login-form input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.login-error {
  background: var(--color-danger-light);
  color: var(--color-danger);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: 16px;
}

/* ========== App Layout ========== */
.app-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ========== Sidebar ========== */
.sidebar {
  width: var(--sidebar-width);
  background: var(--color-sidebar);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
}

.sidebar-header {
  padding: 20px 20px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-inverse);
  font-size: 16px;
  font-weight: 700;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: rgba(255,255,255,0.6);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.15s;
}

.nav-item:hover {
  background: var(--color-sidebar-hover);
  color: rgba(255,255,255,0.9);
}

.nav-item.active {
  background: var(--color-sidebar-active);
  color: var(--color-text-inverse);
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.user-details {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.user-name {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role {
  font-size: 11px;
  color: rgba(255,255,255,0.4);
}

.btn-logout {
  background: none;
  border: none;
  color: rgba(255,255,255,0.4);
  padding: 6px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.btn-logout:hover {
  color: var(--color-danger);
  background: rgba(239, 68, 68, 0.1);
}

/* ========== Main Content ========== */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}

.topbar {
  height: var(--topbar-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.topbar-left h1 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.topbar-time {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.content-area {
  flex: 1;
  padding: 28px;
  overflow-y: auto;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  border: 1.5px solid transparent;
  transition: all 0.15s;
  white-space: nowrap;
}

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

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

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg);
}

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

.btn-danger:hover {
  background: #DC2626;
}

.btn-outline {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}

.btn-outline:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

.btn-block {
  width: 100%;
}

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

/* ========== Cards ========== */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.card-body {
  padding: 20px;
}

/* ========== KPI Cards Grid ========== */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.kpi-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.kpi-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.kpi-value {
  font-size: 30px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.5px;
}

.kpi-change {
  font-size: 12px;
  font-weight: 500;
}

.kpi-change.up { color: var(--color-success); }
.kpi-change.down { color: var(--color-danger); }

/* ========== Charts Grid ========== */
.charts-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.chart-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 20px;
}

.chart-card h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text);
}

.chart-container {
  position: relative;
  height: 280px;
}

/* ========== Tables ========== */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 14px;
  color: var(--color-text);
}

table tbody tr:hover {
  background: var(--color-surface-hover);
}

.table-actions {
  display: flex;
  gap: 8px;
}

/* ========== Toolbar ========== */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.search-input {
  height: 38px;
  padding: 0 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-surface);
  min-width: 240px;
  transition: border-color 0.15s;
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.toolbar select {
  height: 38px;
  padding: 0 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-surface);
  cursor: pointer;
}

.toolbar select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.toolbar-spacer {
  flex: 1;
}

.results-count {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* ========== Pagination ========== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 16px 0;
}

.pagination-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.pagination-btn:hover:not(:disabled) {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pagination-btn.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.pagination-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ========== Status Badges ========== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.badge-success {
  background: var(--color-success-light);
  color: #065F46;
}

.badge-warning {
  background: var(--color-warning-light);
  color: #92400E;
}

.badge-danger {
  background: var(--color-danger-light);
  color: #991B1B;
}

.badge-info {
  background: var(--color-info-light);
  color: #1E40AF;
}

.badge-neutral {
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
}

/* ========== Modal ========== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  animation: fadeIn 0.15s ease-out;
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  width: 480px;
  max-width: 90vw;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.2s ease-out;
}

.modal-header {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 17px;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  font-size: 22px;
  color: var(--color-text-muted);
  transition: color 0.15s;
}

.modal-close:hover {
  color: var(--color-text);
}

.modal-body {
  padding: 24px;
}

.modal-body .form-group {
  margin-bottom: 18px;
}

.modal-body label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.modal-body input,
.modal-body select,
.modal-body textarea {
  width: 100%;
  height: 40px;
  padding: 0 12px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color 0.15s;
}

.modal-body input:focus,
.modal-body select:focus,
.modal-body textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.modal-body textarea {
  height: 80px;
  padding: 10px 12px;
  resize: vertical;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 24px;
}

/* ========== Toast ========== */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  color: white;
  box-shadow: var(--shadow-md);
  animation: slideIn 0.3s ease-out, fadeOut 0.3s ease-in forwards;
  animation-delay: 0s, 2.7s;
  max-width: 380px;
}

.toast-success { background: var(--color-success); }
.toast-error { background: var(--color-danger); }
.toast-warning { background: var(--color-warning); color: #92400E; }

/* ========== Animations ========== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* ========== Loading & Empty States ========== */
.loading-state {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: var(--color-text-muted);
  font-size: 14px;
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 12px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: var(--color-text-muted);
  text-align: center;
}

.empty-state svg {
  margin-bottom: 16px;
  opacity: 0.4;
}

.empty-state p {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.empty-state span {
  font-size: 13px;
  margin-top: 4px;
}

/* ========== Settings Page ========== */
.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.settings-grid .card {
  margin-bottom: 0;
}

.settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border-light);
}

.settings-item:last-child {
  border-bottom: none;
}

.settings-item-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}

.settings-item-value {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.settings-item-value.mono {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 12px;
}

/* ========== Log Timeline ========== */
.log-list {
  display: flex;
  flex-direction: column;
}

.log-item {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border-light);
}

.log-item:last-child {
  border-bottom: none;
}

.log-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 14px;
}

.log-icon.assign { background: var(--color-info-light); color: var(--color-info); }
.log-icon.revoke { background: var(--color-danger-light); color: var(--color-danger); }
.log-icon.points { background: var(--color-warning-light); color: var(--color-warning); }

.log-content {
  flex: 1;
  min-width: 0;
}

.log-action {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.log-detail {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 2px;
}

.log-time {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ========== Two-Column Layout ========== */
.two-col-layout {
  display: flex;
  gap: 16px;
  margin-bottom: 0;
}

.two-col-layout > .card {
  margin-bottom: 0;
}

/* ========== Leaderboard ========== */
.leaderboard-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 260px;
  overflow-y: auto;
}

.leaderboard-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 4px;
}

.leaderboard-rank {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
}

.leaderboard-rank.rank-1 { background: #FEF3C7; color: #B45309; }
.leaderboard-rank.rank-2 { background: #F1F5F9; color: #475569; }
.leaderboard-rank.rank-3 { background: #FEE2E2; color: #B91C1C; }

.leaderboard-user {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.leaderboard-value {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}

/* ========== KPI Color Variants ========== */
.kpi-value.kpi-green { color: #16a34a; }
.kpi-value.kpi-red   { color: #DC2626; }

/* ========== Extra Badge Colors ========== */
.badge-purple { background: #EDE9FE; color: #7C3AED; }

/* ========== Code Monospace ========== */
.code-mono {
  font-family: 'Menlo', 'Monaco', 'Consolas', monospace;
  font-size: 12px;
  background: var(--color-bg-alt);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--color-text-secondary);
}

/* ========== Date Input ========== */
.date-input {
  height: 36px;
  padding: 0 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.15s;
}

.date-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* ========== Responsive ========== */
@media (max-width: 1200px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .charts-grid { grid-template-columns: 1fr; }
  .settings-grid { grid-template-columns: 1fr; }
  .two-col-layout { flex-direction: column; }
}

@media (max-width: 768px) {
  .sidebar { width: 64px; }
  .sidebar-logo span,
  .nav-item span,
  .user-details,
  .sidebar-header { padding: 12px; }
  .kpi-grid { grid-template-columns: 1fr; }
  .content-area { padding: 16px; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .search-input { min-width: auto; }
}