/* ===================================
   寻梦后台管理系统 - Deep Dark Theme
   =================================== */

/* --- CSS Variables --- */
:root {
  --bg-primary: #1a1d23;
  --bg-card: #22252d;
  --bg-hover: #2a2d35;
  --bg-input: #1a1d23;
  --border: #2a2d35;
  --border-light: #333845;
  --accent: #ff6b6b;
  --accent-hover: #ff8787;
  --accent-bg: rgba(255, 107, 107, 0.10);
  --warning: #ffd93d;
  --warning-bg: rgba(255, 217, 61, 0.12);
  --success: #6bcb77;
  --success-bg: rgba(107, 203, 119, 0.12);
  --info: #4d96ff;
  --info-bg: rgba(77, 150, 255, 0.12);
  --danger: #ff6b6b;
  --danger-bg: rgba(255, 107, 107, 0.12);
  --text-primary: #e0e0e0;
  --text-secondary: #c0c0c8;
  --text-muted: #7a7f8a;
  --text-dim: #555860;
  --radius-sm: 4px;
  --radius: 6px;
  --radius-lg: 8px;
  --radius-xl: 10px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* --- Reset & Base --- */
body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}
h1,h2,h3,h4,h5,h6 { color: var(--text-primary); }
a { color: var(--accent); }
a:hover { color: var(--accent-hover); }

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* --- Sidebar --- */
.admin-sidebar {
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  width: 220px;
  min-height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: width 0.2s ease;
}
.admin-sidebar.collapsed { width: 64px; }
.admin-sidebar.collapsed .sidebar-brand h4,
.admin-sidebar.collapsed .nav-label,
.admin-sidebar.collapsed .sidebar-footer { display: none; }
.admin-sidebar.collapsed .sidebar-brand { justify-content: center; }
.admin-sidebar.collapsed .nav-item a { justify-content: center; padding: 10px; }

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
}
.sidebar-brand-icon {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  border-radius: var(--radius);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700;
  flex-shrink: 0;
}
.sidebar-brand h4 {
  color: var(--text-primary);
  font-size: 16px; font-weight: 700;
  margin: 0; white-space: nowrap;
}

.sidebar-nav {
  flex: 1;
  padding: 10px 10px;
  overflow-y: auto;
}
.sidebar-nav .nav-item { margin-bottom: 2px; }
.sidebar-nav .nav-item a {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 13px;
  text-decoration: none;
  transition: all 0.15s ease;
  white-space: nowrap;
  overflow: hidden;
}
.sidebar-nav .nav-item a:hover { color: var(--text-primary); background: var(--bg-hover); }
.sidebar-nav .nav-item a i { font-size: 18px; width: 20px; text-align: center; flex-shrink: 0; }
.sidebar-nav .nav-item.active a {
  color: var(--accent);
  background: var(--accent-bg);
  border-left: 2px solid var(--accent);
  padding-left: 10px;
}

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 11px;
  text-align: center;
}

/* --- Header / Topbar --- */
.admin-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 0 18px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 99;
  margin-left: 220px;
  transition: margin-left 0.2s ease;
}
.admin-sidebar.collapsed ~ .admin-header { margin-left: 64px; }

.header-toggle {
  background: none; border: none;
  color: var(--text-muted);
  font-size: 18px; cursor: pointer;
  padding: 4px; line-height: 1;
}
.header-toggle:hover { color: var(--text-primary); }

.header-user {
  display: flex; align-items: center; gap: 8px;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 13px;
}
.header-user .avatar {
  width: 30px; height: 30px;
  background: var(--bg-hover);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  font-size: 13px;
}
.header-user:hover { color: var(--text-primary); }
.header-user .caret { color: var(--text-dim); font-size: 10px; }

.header-user .dropdown-menu {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 0;
  margin-top: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
.header-user .dropdown-menu a {
  color: var(--text-secondary);
  font-size: 13px;
  padding: 8px 16px;
  display: flex; align-items: center; gap: 8px;
}
.header-user .dropdown-menu a:hover { background: var(--bg-hover); color: var(--text-primary); }

/* --- Main Content Area --- */
.admin-main {
  margin-left: 220px;
  min-height: calc(100vh - 52px);
  transition: margin-left 0.2s ease;
}
.admin-sidebar.collapsed ~ .admin-main { margin-left: 64px; }

.admin-main iframe {
  width: 100%;
  border: none;
  min-height: calc(100vh - 52px);
}

/* --- Content Container (inside iframe pages) --- */
.content-wrapper {
  padding: 20px;
  background: var(--bg-primary);
  min-height: 100vh;
}

/* --- Page Title --- */
.page-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 18px;
}
.page-breadcrumb {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.page-breadcrumb .current { color: var(--text-primary); }

/* --- Card --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
}
.card-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}
.card-header-icon {
  width: 34px; height: 34px;
  background: var(--accent-bg);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  font-size: 16px;
}
.card-header h5 {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 14px;
  margin: 0;
}
.card-header .card-subtitle {
  color: var(--text-muted);
  font-size: 11px;
  display: block;
}
.card-body { padding: 18px; }
.card-footer {
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
}

/* --- Search Toolbar --- */
.toolbar-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  margin-bottom: 14px;
}
.toolbar-row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

/* --- Form Controls --- */
.form-control, .form-control-sm {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: var(--radius);
  font-size: 13px;
  padding: 8px 12px;
  transition: border-color 0.15s;
}
.form-control:focus, .form-control-sm:focus {
  background: var(--bg-input);
  border-color: var(--accent);
  color: var(--text-primary);
  box-shadow: 0 0 0 2px rgba(255,107,107,0.15);
  outline: none;
}
.form-control::placeholder { color: var(--text-muted); }
.form-control:disabled, .form-control[readonly] {
  background: var(--bg-hover);
  color: var(--text-muted);
}
select.form-control, select.form-control-sm {
  color: var(--text-primary);
}
select.form-control option {
  background: var(--bg-card);
  color: var(--text-primary);
}
label {
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 4px;
  display: block;
}
.form-group { margin-bottom: 14px; }

/* --- Buttons --- */
.btn {
  font-size: 13px;
  padding: 7px 16px;
  border-radius: var(--radius);
  font-weight: 500;
  transition: all 0.15s;
  border: 1px solid transparent;
}
.btn-sm { font-size: 12px; padding: 5px 12px; }
.btn-xs { font-size: 11px; padding: 2px 8px; }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover, .btn-primary:focus {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
}
.btn-primary:active { background: #e55a5a !important; border-color: #e55a5a !important; }

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

.btn-success { background: var(--success); border-color: var(--success); color: #fff; }
.btn-success:hover { background: #5ab768; border-color: #5ab768; }

.btn-warning { background: var(--warning); border-color: var(--warning); color: #1a1d23; }
.btn-warning:hover { background: #f0cc2e; border-color: #f0cc2e; }

.btn-info { background: var(--info); border-color: var(--info); color: #fff; }
.btn-info:hover { background: #3d87f0; border-color: #3d87f0; }

.btn-danger {
  background: transparent;
  border-color: rgba(255,107,107,0.25);
  color: var(--danger);
}
.btn-danger:hover {
  background: var(--danger-bg);
  border-color: var(--danger);
  color: var(--danger);
}

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

/* --- Table --- */
.table-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.table {
  width: 100%;
  border-collapse: collapse;
  color: var(--text-secondary);
  font-size: 13px;
  margin: 0;
}
.table th {
  background: #252830;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 12px;
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.table tbody tr:hover td {
  background: rgba(255,255,255,0.02);
}
.table tbody tr:last-child td { border-bottom: none; }
.table .text-center { text-align: center; }
.table-responsive { overflow-x: auto; }

/* --- Badges --- */
.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 3px;
  font-size: 11px;
  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-muted { background: rgba(122,127,138,0.12); color: var(--text-muted); }
.badge-info { background: var(--info-bg); color: var(--info); }

/* --- Pagination --- */
.pagination-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0 0;
  font-size: 12px;
  color: var(--text-muted);
}
.pagination-pages {
  display: flex;
  gap: 4px;
}
.pagination-pages .btn-page {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  cursor: pointer;
}
.pagination-pages .btn-page:hover { background: var(--bg-hover); color: var(--text-primary); }
.pagination-pages .btn-page.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* --- Stat Cards (Dashboard) --- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.stat-card-icon {
  width: 46px; height: 46px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.stat-card-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}
.stat-card-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}
.stat-icon-red { background: var(--accent-bg); color: var(--accent); }
.stat-icon-blue { background: var(--info-bg); color: var(--info); }
.stat-icon-green { background: var(--success-bg); color: var(--success); }
.stat-icon-yellow { background: var(--warning-bg); color: var(--warning); }
.stat-icon-purple { background: rgba(146,109,222,0.12); color: #926dde; }
.stat-icon-cyan { background: rgba(0,201,167,0.12); color: #00c9a7; }
.stat-icon-pink { background: rgba(237,91,160,0.12); color: #ed5ba0; }

/* --- Login Page --- */
.login-wrapper {
  min-height: 100vh;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.login-glow-1 {
  position: absolute;
  top: -60px; right: -80px;
  width: 360px; height: 360px;
  background: radial-gradient(circle, rgba(255,107,107,0.10), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.login-glow-2 {
  position: absolute;
  bottom: -80px; left: -60px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(255,107,107,0.06), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  width: 380px;
  position: relative;
  z-index: 1;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}
.login-logo {
  text-align: center;
  margin-bottom: 28px;
}
.login-logo-icon {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  border-radius: var(--radius-lg);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 700;
  margin: 0 auto 12px;
}
.login-logo h3 {
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 4px;
}
.login-logo p {
  color: var(--text-muted);
  font-size: 12px;
  margin: 0;
}
.login-card .alert {
  background: var(--danger-bg);
  border: 1px solid rgba(255,107,107,0.2);
  color: var(--danger);
  border-radius: var(--radius);
  font-size: 12px;
  padding: 8px 12px;
}

/* --- Modal (Dark) --- */
.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
}
.modal-header {
  border-bottom: 1px solid var(--border);
  padding: 14px 18px;
}
.modal-header .modal-title { color: var(--text-primary); font-weight: 600; font-size: 15px; }
.modal-header .close { color: var(--text-muted); opacity: 1; text-shadow: none; }
.modal-header .close:hover { color: var(--text-primary); }
.modal-body { padding: 18px; }
.modal-footer {
  border-top: 1px solid var(--border);
  padding: 12px 18px;
}
.modal-backdrop { background: rgba(0,0,0,0.6); }
.modal-backdrop.show { opacity: 0.6; }

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: 48px 20px;
}
.empty-state-icon {
  font-size: 40px;
  margin-bottom: 12px;
  opacity: 0.6;
}
.empty-state h5 {
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}
.empty-state p {
  color: var(--text-muted);
  font-size: 12px;
  margin: 0;
}

/* --- Loading Spinner --- */
.loading-spinner {
  text-align: center;
  padding: 32px 20px;
  color: var(--text-muted);
  font-size: 13px;
}
.loading-spinner::before {
  content: '';
  display: block;
  width: 28px; height: 28px;
  border: 3px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: 50%;
  margin: 0 auto 10px;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Toast --- */
.toast-container {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}
.toast-msg {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 13px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  animation: toastIn 0.25s ease;
}
.toast-msg.toast-success { border-left: 3px solid var(--success); }
.toast-msg.toast-error { border-left: 3px solid var(--danger); }
@keyframes toastIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* --- Responsive --- */
@media (max-width: 768px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .toolbar-row { flex-direction: column; }
  .toolbar-row .form-control { width: 100%; }
  .admin-sidebar { width: 64px; }
  .admin-sidebar .sidebar-brand h4,
  .admin-sidebar .nav-label,
  .admin-sidebar .sidebar-footer { display: none; }
  .admin-header { margin-left: 64px; }
  .admin-main { margin-left: 64px; }
}