/* ============================================
   Viola Wiki 管理后台 v2.0 - 全局样式
   Last updated: 2026-09-06 10:45 UTC
   ============================================ */

:root {
  --admin-primary: #6366f1;
  --admin-primary-dark: #4f46e5;
  --admin-primary-light: #818cf8;
  --admin-secondary: #8b5cf6;
  --admin-bg: #f8fafc;
  --admin-surface: #ffffff;
  --admin-sidebar-bg: #0f172a;
  --admin-sidebar-hover: #1e293b;
  --admin-text: #1e293b;
  --admin-text-muted: #64748b;
  --admin-text-light: #94a3b8;
  --admin-border: #e2e8f0;
  --admin-success: #10b981;
  --admin-warning: #f59e0b;
  --admin-danger: #ef4444;
  --admin-info: #3b82f6;
  --admin-radius: 10px;
  --admin-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  --admin-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --admin-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --sidebar-width: 260px;
  --header-height: 64px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: var(--admin-text);
  background-color: var(--admin-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--admin-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--admin-primary-dark);
  text-decoration: none;
}

button {
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
  border: none;
  background: none;
  outline: none;
  transition: all 0.2s ease;
}

button:focus-visible {
  outline: 2px solid var(--admin-primary);
  outline-offset: 2px;
}

input, textarea, select {
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

/* ---------- 布局 ---------- */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background: linear-gradient(180deg, var(--admin-sidebar-bg) 0%, #1a2332 100%);
  color: #fff;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15);
}

.sidebar-brand {
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(10px);
}

.sidebar-title {
  font-size: 18px;
  font-weight: 700;
  background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 16px 12px;
}

.sidebar-nav::-webkit-scrollbar {
  width: 4px;
}

.sidebar-nav::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
}

.sidebar-section-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, 0.4);
  padding: 16px 12px 8px;
  margin-top: 8px;
}

.sidebar-section-label:first-child {
  margin-top: 0;
  padding-top: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 500;
  font-size: 14px;
  transition: all 0.2s ease;
  margin-bottom: 2px;
}

.nav-item:hover {
  background: var(--admin-sidebar-hover);
  color: #fff;
  transform: translateX(2px);
}

.nav-item.active {
  background: linear-gradient(135deg, var(--admin-primary) 0%, var(--admin-secondary) 100%);
  color: #fff;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
  font-weight: 600;
}

.nav-icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

.nav-label {
  flex: 1;
}

.sidebar-footer {
  padding: 16px 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
  backdrop-filter: blur(4px);
}

.sidebar-overlay.show {
  display: block;
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay.show {
    display: block;
  }
}

.main-area {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

@media (max-width: 768px) {
  .main-area {
    margin-left: 0;
  }
}

.header {
  height: var(--header-height);
  background: var(--admin-surface);
  border-bottom: 1px solid var(--admin-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.9);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.menu-toggle {
  display: none;
  padding: 8px;
  border-radius: 6px;
  font-size: 20px;
  color: var(--admin-text-muted);
}

.menu-toggle:hover {
  background: var(--admin-bg);
  color: var(--admin-text);
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
}

.page-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--admin-text);
}

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

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px;
  border-radius: 20px;
  background: var(--admin-bg);
  border: 1px solid var(--admin-border);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--admin-primary) 0%, var(--admin-secondary) 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
}

.user-name {
  font-weight: 600;
  color: var(--admin-text);
  font-size: 14px;
}

.role-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.logout-btn {
  padding: 8px 16px;
  border-radius: 6px;
  background: var(--admin-danger);
  color: #fff;
  font-weight: 500;
  font-size: 13px;
  transition: all 0.2s ease;
}

.logout-btn:hover {
  background: #dc2626;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.content-area {
  flex: 1;
  padding: 24px;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

/* ---------- 按钮系统 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 500;
  font-size: 14px;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--admin-shadow-md);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--admin-primary) 0%, var(--admin-secondary) 100%);
  color: #fff;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--admin-primary-dark) 0%, var(--admin-primary) 100%);
}

.btn-secondary {
  background: var(--admin-surface);
  color: var(--admin-text);
  border: 1px solid var(--admin-border);
}

.btn-secondary:hover {
  background: var(--admin-bg);
  border-color: var(--admin-primary-light);
}

.btn-success {
  background: var(--admin-success);
  color: #fff;
}

.btn-success:hover {
  background: #059669;
}

.btn-danger {
  background: var(--admin-danger);
  color: #fff;
}

.btn-danger:hover {
  background: #dc2626;
}

.btn-warning {
  background: var(--admin-warning);
  color: #fff;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
  border-radius: 6px;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
  border-radius: 10px;
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ---------- 表单 ---------- */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  color: var(--admin-text);
  font-size: 14px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--admin-border);
  border-radius: 8px;
  background: var(--admin-surface);
  color: var(--admin-text);
  font-size: 14px;
  transition: all 0.2s ease;
}

.form-control:focus {
  border-color: var(--admin-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-control::placeholder {
  color: var(--admin-text-light);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

select.form-control {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
  background-position: right 10px center;
  background-repeat: no-repeat;
  background-size: 20px;
  padding-right: 36px;
}

.form-help {
  margin-top: 4px;
  font-size: 12px;
  color: var(--admin-text-muted);
}

.form-error {
  color: var(--admin-danger);
  font-size: 13px;
  margin-top: 4px;
}

/* ---------- 卡片 ---------- */
.card {
  background: var(--admin-surface);
  border-radius: 12px;
  border: 1px solid var(--admin-border);
  box-shadow: var(--admin-shadow);
  overflow: hidden;
  transition: all 0.3s ease;
}

.card:hover {
  box-shadow: var(--admin-shadow-lg);
}

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--admin-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(to right, rgba(99, 102, 241, 0.02), transparent);
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--admin-text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-body {
  padding: 24px;
}

.card-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--admin-border);
  background: var(--admin-bg);
}

/* ---------- 表格 ---------- */
.table-container {
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid var(--admin-border);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--admin-surface);
}

thead {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-bottom: 2px solid var(--admin-border);
}

th {
  padding: 14px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 13px;
  color: var(--admin-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--admin-border);
  color: var(--admin-text);
}

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

tbody tr {
  transition: background-color 0.2s ease;
}

tbody tr:hover {
  background: rgba(99, 102, 241, 0.03);
}

.action-group {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* ---------- 徽章 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.badge-primary {
  background: rgba(99, 102, 241, 0.1);
  color: var(--admin-primary);
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--admin-success);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--admin-warning);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--admin-danger);
}

.badge-info {
  background: rgba(59, 130, 246, 0.1);
  color: var(--admin-info);
}

/* ---------- 统计卡片 ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--admin-surface);
  border-radius: 12px;
  padding: 24px;
  border: 1px solid var(--admin-border);
  box-shadow: var(--admin-shadow);
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--admin-shadow-lg);
}

.stat-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.stat-icon.primary {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
}

.stat-icon.success {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(52, 211, 153, 0.1) 100%);
}

.stat-icon.warning {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(251, 191, 36, 0.1) 100%);
}

.stat-icon.info {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(96, 165, 250, 0.1) 100%);
}

.stat-info {
  flex: 1;
}

.stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--admin-text);
  line-height: 1.2;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 13px;
  color: var(--admin-text-muted);
  font-weight: 500;
}

/* ---------- 分类条形图 ---------- */
.category-bar-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.category-bar-item {
  display: grid;
  grid-template-columns: 140px 1fr 40px;
  align-items: center;
  gap: 12px;
}

.category-bar-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--admin-text);
}

.category-bar-track {
  height: 8px;
  background: var(--admin-bg);
  border-radius: 4px;
  overflow: hidden;
}

.category-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--admin-primary) 0%, var(--admin-secondary) 100%);
  border-radius: 4px;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.category-bar-count {
  font-size: 14px;
  font-weight: 700;
  color: var(--admin-text);
  text-align: right;
}

/* ---------- Toast 通知 ---------- */
#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 400px;
}

.toast {
  padding: 14px 20px;
  border-radius: 10px;
  background: var(--admin-surface);
  border: 1px solid var(--admin-border);
  box-shadow: var(--admin-shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: slideInRight 0.3s ease;
  position: relative;
  overflow: hidden;
}

.toast::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
}

.toast.success {
  border-left: 4px solid var(--admin-success);
}

.toast.error {
  border-left: 4px solid var(--admin-danger);
}

.toast.info {
  border-left: 4px solid var(--admin-info);
}

.toast.warning {
  border-left: 4px solid var(--admin-warning);
}

.toast-message {
  flex: 1;
  font-size: 14px;
  font-weight: 500;
}

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

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

/* ---------- 模态框 ---------- */
#modal-container {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

#modal-container.show {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.modal {
  position: relative;
  background: var(--admin-surface);
  border-radius: 16px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow: auto;
  animation: modalIn 0.3s ease;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-header {
  padding: 24px 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--admin-text);
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--admin-text-muted);
  transition: all 0.2s ease;
}

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

.modal-body {
  padding: 20px 24px;
}

.modal-footer {
  padding: 0 24px 24px;
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* ---------- 加载状态 ---------- */
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--admin-border);
  border-top-color: var(--admin-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  gap: 16px;
}

.loading-text {
  color: var(--admin-text-muted);
  font-size: 14px;
}

.skeleton {
  background: linear-gradient(90deg, var(--admin-bg) 25%, #f8fafc 50%, var(--admin-bg) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---------- 空状态 ---------- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
}

.empty-state-icon {
  font-size: 64px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--admin-text);
  margin-bottom: 8px;
}

.empty-state-text {
  color: var(--admin-text-muted);
  margin-bottom: 24px;
}

/* ---------- 分页 ---------- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.pagination-btn {
  padding: 8px 14px;
  border-radius: 6px;
  border: 1px solid var(--admin-border);
  background: var(--admin-surface);
  color: var(--admin-text);
  font-weight: 500;
  font-size: 13px;
  transition: all 0.2s ease;
}

.pagination-btn:hover:not(:disabled) {
  border-color: var(--admin-primary);
  color: var(--admin-primary);
  background: rgba(99, 102, 241, 0.05);
}

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

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

/* ---------- 工具栏 ---------- */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.toolbar-left,
.toolbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-box {
  position: relative;
  width: 280px;
}

.search-input {
  width: 100%;
  padding: 10px 16px 10px 40px;
  border: 1.5px solid var(--admin-border);
  border-radius: 8px;
  background: var(--admin-surface);
  font-size: 14px;
  transition: all 0.2s ease;
}

.search-input:focus {
  border-color: var(--admin-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--admin-text-light);
  pointer-events: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
  
  .search-box {
    width: 220px;
  }
}

@media (max-width: 768px) {
  .content-area {
    padding: 16px;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  
  .toolbar-left,
  .toolbar-right {
    flex-wrap: wrap;
  }
  
  .search-box {
    width: 100%;
  }
  
  .header {
    padding: 0 16px;
  }
  
  .user-name {
    display: none;
  }
  
  .category-bar-item {
    grid-template-columns: 1fr 80px 40px;
    gap: 8px;
  }
}