/* ====== Admin Design System ====== */
:root {
  --admin-primary: #E8760A;
  --admin-primary-dark: #CF6808;
  --admin-primary-soft: rgba(232,118,10,0.08);
  --admin-accent: #F5A623;
  --admin-dark: #3D2B1F;
  --admin-sidebar: #2E1F13;
  --admin-sidebar-hover: #3D2B1F;
  --admin-sidebar-active: #4C3828;
  --admin-bg: #F8F5F0;
  --admin-card: #ffffff;
  --admin-border: #E8E0D5;
  --admin-text: #2E1F13;
  --admin-text-secondary: #7A6B5D;
  --admin-text-muted: #A69585;
  --admin-success: #059669;
  --admin-success-soft: rgba(5,150,105,0.1);
  --admin-warning: #D4850C;
  --admin-warning-soft: rgba(212,133,12,0.1);
  --admin-danger: #dc2626;
  --admin-danger-soft: rgba(220,38,38,0.1);
  --admin-info: #2563eb;
  --admin-info-soft: rgba(37,99,235,0.1);
  --admin-radius: 10px;
  --admin-radius-lg: 14px;
  --admin-shadow: 0 1px 3px rgba(46,31,19,0.05);
  --admin-shadow-lg: 0 8px 24px rgba(46,31,19,0.07);
  --admin-transition: all 0.2s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--admin-bg); color: var(--admin-text);
  display: flex; min-height: 100vh;
}
a { text-decoration: none; color: inherit; }

/* ====== Sidebar ====== */
.admin-sidebar {
  width: 240px; background: var(--admin-sidebar); color: white;
  display: flex; flex-direction: column; position: fixed;
  top: 0; left: 0; bottom: 0; z-index: 100;
  transition: var(--admin-transition);
}
.sidebar-brand {
  padding: 24px 20px; display: flex; align-items: center; gap: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.sidebar-brand .brand-icon {
  width: 36px; height: 36px; background: var(--admin-primary);
  border-radius: 10px; display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 16px;
}
.sidebar-brand .brand-text { font-size: 16px; font-weight: 700; }
.sidebar-brand .brand-sub { font-size: 11px; color: rgba(255,255,255,0.4); }

.sidebar-nav { flex: 1; padding: 16px 0; overflow-y: auto; }
.nav-group { margin-bottom: 8px; }
.nav-group-title {
  padding: 8px 24px; font-size: 11px; font-weight: 600;
  color: rgba(255,255,255,0.3); text-transform: uppercase; letter-spacing: 0.5px;
}
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 24px; font-size: 14px; color: rgba(255,255,255,0.6);
  cursor: pointer; transition: var(--admin-transition);
  border-left: 3px solid transparent; position: relative;
}
.nav-item:hover { background: var(--admin-sidebar-hover); color: rgba(255,255,255,0.9); }
.nav-item.active {
  background: var(--admin-sidebar-active); color: white;
  border-left-color: var(--admin-primary);
}
.nav-item .nav-icon { font-size: 16px; width: 20px; text-align: center; }
.nav-item .nav-badge {
  margin-left: auto; background: var(--admin-primary);
  padding: 2px 7px; border-radius: 10px; font-size: 11px;
  font-weight: 700; color: white;
}

.sidebar-footer {
  padding: 16px 20px; border-top: 1px solid rgba(255,255,255,0.06);
  display: flex; align-items: center; gap: 10px; font-size: 13px;
  color: rgba(255,255,255,0.5); cursor: pointer;
}
.sidebar-footer:hover { color: white; }
.sidebar-footer .avatar {
  width: 32px; height: 32px; border-radius: 8px;
  background: linear-gradient(135deg, var(--admin-primary), var(--admin-accent));
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; color: white;
}

/* ====== Main Content ====== */
.admin-main {
  margin-left: 240px; flex: 1; display: flex; flex-direction: column; min-height: 100vh;
}

/* Top Bar */
.admin-topbar {
  height: 64px; background: white; border-bottom: 1px solid var(--admin-border);
  display: flex; align-items: center; padding: 0 32px; gap: 16px;
  position: sticky; top: 0; z-index: 50;
}
.topbar-title { font-size: 18px; font-weight: 700; }
.topbar-breadcrumb { font-size: 13px; color: var(--admin-text-muted); }
.topbar-breadcrumb a { color: var(--admin-text-secondary); }
.topbar-breadcrumb a:hover { color: var(--admin-primary); }
.topbar-spacer { flex: 1; }
.topbar-search {
  display: flex; align-items: center; background: var(--admin-bg);
  border-radius: 8px; padding: 0 12px; width: 240px;
}
.topbar-search input {
  border: none; background: none; padding: 8px 8px; flex: 1;
  font-size: 13px; outline: none; color: var(--admin-text);
}
.topbar-search button { border: none; background: none; cursor: pointer; font-size: 14px; }
.topbar-actions { display: flex; align-items: center; gap: 8px; }
.topbar-icon {
  width: 36px; height: 36px; border-radius: 8px; border: none;
  background: none; cursor: pointer; font-size: 18px; position: relative;
  display: flex; align-items: center; justify-content: center;
  transition: var(--admin-transition);
}
.topbar-icon:hover { background: var(--admin-bg); }
.topbar-icon .dot {
  position: absolute; top: 6px; right: 6px; width: 8px; height: 8px;
  background: var(--admin-primary); border-radius: 50%; border: 2px solid white;
}

/* ====== Page Content ====== */
.admin-content { padding: 28px 32px; flex: 1; }

/* Page Header */
.page-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 24px;
}
.page-header h1 { font-size: 24px; font-weight: 800; letter-spacing: -0.5px; }
.page-header p { font-size: 13px; color: var(--admin-text-muted); margin-top: 4px; }
.page-actions { display: flex; gap: 8px; }

/* Cards */
.admin-card {
  background: var(--admin-card); border: 1px solid var(--admin-border);
  border-radius: var(--admin-radius-lg); padding: 24px;
  box-shadow: var(--admin-shadow);
}
.admin-card .card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px;
}
.admin-card .card-title { font-size: 16px; font-weight: 700; }
.admin-card .card-subtitle { font-size: 12px; color: var(--admin-text-muted); margin-top: 2px; }
.admin-card .card-action { font-size: 13px; color: var(--admin-text-secondary); cursor: pointer; }
.admin-card .card-action:hover { color: var(--admin-primary); }

/* Stat Cards */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.stat-card {
  background: white; border: 1px solid var(--admin-border);
  border-radius: var(--admin-radius-lg); padding: 24px;
  box-shadow: var(--admin-shadow); position: relative; overflow: hidden;
}
.stat-card::after {
  content: ''; position: absolute; top: 0; right: 0;
  width: 100px; height: 100px; border-radius: 50%;
  opacity: 0.05; transform: translate(30%, -30%);
}
.stat-card.primary::after { background: var(--admin-primary); }
.stat-card.success::after { background: var(--admin-success); }
.stat-card.warning::after { background: var(--admin-warning); }
.stat-card.info::after { background: var(--admin-info); }
.stat-card .stat-icon {
  width: 44px; height: 44px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; margin-bottom: 14px;
}
.stat-card.primary .stat-icon { background: var(--admin-primary-soft); }
.stat-card.success .stat-icon { background: var(--admin-success-soft); }
.stat-card.warning .stat-icon { background: var(--admin-warning-soft); }
.stat-card.info .stat-icon { background: var(--admin-info-soft); }
.stat-card .stat-value { font-size: 28px; font-weight: 800; margin-bottom: 4px; }
.stat-card .stat-label { font-size: 13px; color: var(--admin-text-muted); }
.stat-card .stat-change {
  display: inline-flex; align-items: center; gap: 2px;
  font-size: 12px; font-weight: 600; margin-top: 8px;
  padding: 2px 6px; border-radius: 4px;
}
.stat-card .stat-change.up { color: var(--admin-success); background: var(--admin-success-soft); }
.stat-card .stat-change.down { color: var(--admin-danger); background: var(--admin-danger-soft); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 18px; border-radius: 8px; font-size: 13px;
  font-weight: 600; cursor: pointer; border: none;
  transition: var(--admin-transition); white-space: nowrap;
}
.btn-primary { background: var(--admin-primary); color: white; }
.btn-primary:hover { background: var(--admin-primary-dark); }
.btn-success { background: var(--admin-success); color: white; }
.btn-success:hover { opacity: 0.9; }
.btn-warning { background: var(--admin-warning); color: white; }
.btn-warning:hover { opacity: 0.9; }
.btn-danger { background: var(--admin-danger); color: white; }
.btn-danger:hover { opacity: 0.9; }
.btn-outline {
  background: white; color: var(--admin-text-secondary);
  border: 1px solid var(--admin-border);
}
.btn-outline:hover { border-color: var(--admin-text-muted); color: var(--admin-text); }
.btn-ghost { background: none; border: none; color: var(--admin-text-secondary); }
.btn-ghost:hover { color: var(--admin-primary); background: var(--admin-primary-soft); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 14px; }
.btn-icon { width: 36px; height: 36px; padding: 0; justify-content: center; }

/* Tables */
.admin-table {
  width: 100%; border-collapse: separate; border-spacing: 0;
}
.admin-table th {
  text-align: left; padding: 12px 16px; font-size: 12px;
  font-weight: 600; color: var(--admin-text-muted);
  text-transform: uppercase; letter-spacing: 0.3px;
  border-bottom: 1px solid var(--admin-border);
  background: var(--admin-bg);
}
.admin-table th:first-child { border-radius: 8px 0 0 0; }
.admin-table th:last-child { border-radius: 0 8px 0 0; }
.admin-table td {
  padding: 14px 16px; font-size: 13px; border-bottom: 1px solid var(--admin-border);
  vertical-align: middle;
}
.admin-table tr:hover td { background: rgba(46,31,19,0.02); }
.admin-table .cell-main { font-weight: 600; color: var(--admin-text); }
.admin-table .cell-sub { font-size: 12px; color: var(--admin-text-muted); margin-top: 2px; }
.admin-table .cell-flex { display: flex; align-items: center; gap: 10px; }
.admin-table .cell-avatar {
  width: 36px; height: 36px; border-radius: 8px; background: var(--admin-bg);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; flex-shrink: 0;
}

/* Status Badges */
.status-badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 10px; border-radius: 6px; font-size: 12px; font-weight: 600;
}
.status-badge::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
}
.status-badge.success { background: var(--admin-success-soft); color: var(--admin-success); }
.status-badge.success::before { background: var(--admin-success); }
.status-badge.warning { background: var(--admin-warning-soft); color: var(--admin-warning); }
.status-badge.warning::before { background: var(--admin-warning); }
.status-badge.danger { background: var(--admin-danger-soft); color: var(--admin-danger); }
.status-badge.danger::before { background: var(--admin-danger); }
.status-badge.info { background: var(--admin-info-soft); color: var(--admin-info); }
.status-badge.info::before { background: var(--admin-info); }
.status-badge.muted { background: var(--admin-bg); color: var(--admin-text-muted); }
.status-badge.muted::before { background: var(--admin-text-muted); }

/* Filters & Toolbar */
.toolbar {
  display: flex; align-items: center; gap: 8px; margin-bottom: 16px;
  flex-wrap: wrap;
}
.toolbar-group { display: flex; gap: 4px; }
.filter-btn {
  padding: 7px 16px; border-radius: 8px; font-size: 13px;
  border: 1px solid var(--admin-border); background: white;
  color: var(--admin-text-secondary); cursor: pointer;
  transition: var(--admin-transition);
}
.filter-btn:hover { border-color: var(--admin-text-muted); }
.filter-btn.active { background: var(--admin-dark); color: white; border-color: var(--admin-dark); }
.toolbar .spacer { flex: 1; }
.search-input {
  display: flex; align-items: center; background: white;
  border: 1px solid var(--admin-border); border-radius: 8px;
  padding: 0 12px; width: 220px;
}
.search-input input {
  border: none; background: none; padding: 8px 6px; flex: 1;
  font-size: 13px; outline: none;
}

/* Pagination */
.pagination {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--admin-border);
}
.pagination .info { font-size: 13px; color: var(--admin-text-muted); }
.pagination .pages { display: flex; gap: 4px; }
.page-btn {
  width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--admin-border);
  background: white; cursor: pointer; font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  transition: var(--admin-transition);
}
.page-btn:hover { border-color: var(--admin-text-muted); }
.page-btn.active { background: var(--admin-dark); color: white; border-color: var(--admin-dark); }

/* Forms */
.form-group { margin-bottom: 18px; }
.form-label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.form-input, .form-select, .form-textarea {
  width: 100%; padding: 10px 14px; border: 1px solid var(--admin-border);
  border-radius: 8px; font-size: 13px; outline: none;
  transition: var(--admin-transition); background: white;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--admin-primary); box-shadow: 0 0 0 3px var(--admin-primary-soft);
}
.form-textarea { min-height: 100px; resize: vertical; }
.form-hint { font-size: 12px; color: var(--admin-text-muted); margin-top: 4px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* Tabs */
.admin-tabs {
  display: flex; gap: 0; border-bottom: 2px solid var(--admin-border);
  margin-bottom: 24px;
}
.admin-tab {
  padding: 10px 20px; font-size: 14px; font-weight: 500;
  color: var(--admin-text-muted); cursor: pointer;
  border: none; background: none; position: relative;
  transition: var(--admin-transition);
}
.admin-tab:hover { color: var(--admin-text-secondary); }
.admin-tab.active { color: var(--admin-text); font-weight: 600; }
.admin-tab.active::after {
  content: ''; position: absolute; bottom: -2px; left: 0; right: 0;
  height: 2px; background: var(--admin-primary);
}
.admin-tab .tab-badge {
  margin-left: 6px; background: var(--admin-primary-soft);
  color: var(--admin-primary); padding: 1px 6px; border-radius: 8px;
  font-size: 11px; font-weight: 700;
}

/* Modal */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.4);
  z-index: 200; display: none; align-items: center; justify-content: center;
}
.modal-overlay.show { display: flex; }
.modal {
  background: white; border-radius: var(--admin-radius-lg);
  width: 560px; max-width: 90vw; max-height: 85vh;
  display: flex; flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}
.modal-header {
  padding: 20px 24px; border-bottom: 1px solid var(--admin-border);
  display: flex; align-items: center; justify-content: space-between;
}
.modal-header h3 { font-size: 16px; font-weight: 700; }
.modal-close {
  width: 32px; height: 32px; border: none; background: none;
  cursor: pointer; font-size: 18px; border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
}
.modal-close:hover { background: var(--admin-bg); }
.modal-body { padding: 24px; overflow-y: auto; flex: 1; }
.modal-footer {
  padding: 16px 24px; border-top: 1px solid var(--admin-border);
  display: flex; justify-content: flex-end; gap: 8px;
}

/* Charts placeholder */
.chart-placeholder {
  height: 280px; background: var(--admin-bg); border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--admin-text-muted); font-size: 13px;
}

/* Grid layouts */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.grid-2-1 { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; }
.grid-1-2 { display: grid; grid-template-columns: 1fr 2fr; gap: 20px; }
.mb-20 { margin-bottom: 20px; }
.mb-24 { margin-bottom: 24px; }

/* Timeline */
.timeline { position: relative; padding-left: 24px; }
.timeline::before {
  content: ''; position: absolute; left: 7px; top: 4px; bottom: 4px;
  width: 2px; background: var(--admin-border);
}
.timeline-item { position: relative; padding-bottom: 20px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: ''; position: absolute; left: -20px; top: 4px;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--admin-border); border: 2px solid white;
}
.timeline-item.active::before { background: var(--admin-primary); }
.timeline-item.success::before { background: var(--admin-success); }
.timeline-item .tl-time { font-size: 12px; color: var(--admin-text-muted); margin-bottom: 2px; }
.timeline-item .tl-text { font-size: 13px; }

/* Responsive */
@media (max-width: 1200px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2-1, .grid-1-2 { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .admin-sidebar { display: none; }
  .admin-main { margin-left: 0; }
  .admin-content { padding: 20px 16px; }
  .stat-grid { grid-template-columns: 1fr; }
}