:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --secondary: #10b981;
  --secondary-dark: #059669;
  --secondary-light: #d1fae5;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --dark-3: #334155;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --danger: #ef4444;
  --warning: #f59e0b;
  --success: #10b981;
  --info: #3b82f6;
  --sidebar-width: 260px;
  --sidebar-collapsed: 70px;
  --topbar-height: 60px;
  --border-radius: 8px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.1);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.1);
  --transition: all .2s ease;
}

[data-theme="dark"] {
  --gray-50: #0f172a;
  --gray-100: #1e293b;
  --gray-200: #334155;
  --gray-300: #475569;
  --gray-400: #64748b;
  --gray-500: #94a3b8;
  --gray-600: #cbd5e1;
  --gray-700: #e2e8f0;
  --gray-800: #f1f5f9;
  --gray-900: #f8fafc;
  --dark: #f8fafc;
  --dark-2: #f1f5f9;
  --dark-3: #e2e8f0;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--gray-100);
  color: var(--gray-900);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Sidebar */
.sidebar {
  position: fixed; top: 0; left: 0; width: var(--sidebar-width); height: 100vh;
  background: var(--dark); color: #fff; z-index: 1040; transition: var(--transition);
  display: flex; flex-direction: column; overflow-y: auto;
}

.sidebar.collapsed { width: var(--sidebar-collapsed); }

.sidebar-logo {
  padding: 16px 20px; display: flex; align-items: center; gap: 12px;
  border-bottom: 1px solid var(--dark-3); min-height: var(--topbar-height);
}

.sidebar-logo img { height: 36px; width: auto; object-fit: contain; }

.sidebar-logo .logo-text {
  font-size: 1.25rem; font-weight: 700; color: #fff; white-space: nowrap;
}

.sidebar-logo .logo-tagline {
  font-size: .65rem; color: var(--gray-400); white-space: nowrap;
}

.sidebar.collapsed .logo-text, .sidebar.collapsed .logo-tagline,
.sidebar.collapsed .nav-text, .sidebar.collapsed .nav-arrow { display: none; }

.sidebar-nav { flex: 1; padding: 12px 0; }

.nav-section { padding: 8px 20px 4px; font-size: .7rem; text-transform: uppercase; letter-spacing: .05em; color: var(--gray-400); }
.sidebar.collapsed .nav-section { display: none; }

.nav-item { display: flex; align-items: center; padding: 10px 20px; color: var(--gray-400); text-decoration: none; transition: var(--transition); cursor: pointer; gap: 12px; position: relative; }
.nav-item:hover { color: #fff; background: var(--dark-3); }
.nav-item.active { color: #fff; background: var(--primary); }
.nav-item i { font-size: 1.1rem; min-width: 20px; text-align: center; }
.nav-text { font-size: .875rem; white-space: nowrap; }
.nav-arrow { margin-left: auto; font-size: .75rem; transition: transform .2s; }
.nav-item.open .nav-arrow { transform: rotate(90deg); }

.nav-submenu { display: none; padding-left: 52px; }
.nav-submenu.show { display: block; }
.nav-submenu .nav-item { padding: 8px 20px; font-size: .8125rem; }

.sidebar-footer { padding: 12px 20px; border-top: 1px solid var(--dark-3); }

/* Main Content */
.main-content {
  margin-left: var(--sidebar-width); min-height: 100vh; transition: var(--transition);
}

.sidebar.collapsed ~ .main-content { margin-left: var(--sidebar-collapsed); }

/* Topbar */
.topbar {
  position: sticky; top: 0; height: var(--topbar-height); background: #fff;
  border-bottom: 1px solid var(--gray-200); display: flex; align-items: center;
  padding: 0 24px; z-index: 1030; gap: 16px;
}

[data-theme="dark"] .topbar { background: var(--dark-2); border-color: var(--gray-200); }

.topbar-toggle { background: none; border: none; font-size: 1.25rem; cursor: pointer; color: var(--gray-600); padding: 4px; }

.topbar-search {
  flex: 1; max-width: 400px; position: relative;
}

.topbar-search input {
  width: 100%; padding: 8px 16px 8px 36px; border: 1px solid var(--gray-200);
  border-radius: 20px; background: var(--gray-50); font-size: .875rem; outline: none; transition: var(--transition);
}

.topbar-search input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
.topbar-search i { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--gray-400); }

.topbar-actions { display: flex; align-items: center; gap: 12px; margin-left: auto; }

.topbar-btn {
  background: none; border: none; position: relative; cursor: pointer;
  color: var(--gray-500); font-size: 1.1rem; padding: 6px; border-radius: 6px; transition: var(--transition);
}
.topbar-btn:hover { background: var(--gray-100); color: var(--gray-700); }
.topbar-badge {
  position: absolute; top: 0; right: 0; background: var(--danger); color: #fff;
  font-size: .625rem; padding: 1px 5px; border-radius: 10px; font-weight: 600;
}

.topbar-user {
  display: flex; align-items: center; gap: 8px; cursor: pointer; padding: 4px 8px;
  border-radius: 8px; transition: var(--transition);
}
.topbar-user:hover { background: var(--gray-100); }
.topbar-avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: .875rem; font-weight: 600; }
.topbar-user-info { line-height: 1.3; }
.topbar-user-name { font-size: .8125rem; font-weight: 600; }
.topbar-user-role { font-size: .6875rem; color: var(--gray-500); }

/* Page Content */
.page-content { padding: 24px; }

/* Breadcrumb */
.breadcrumb-custom {
  display: flex; align-items: center; gap: 8px; margin-bottom: 20px;
  font-size: .8125rem; color: var(--gray-500);
}
.breadcrumb-custom a { color: var(--primary); text-decoration: none; }
.breadcrumb-custom a:hover { text-decoration: underline; }

/* Cards */
.stat-card {
  background: #fff; border-radius: var(--border-radius); padding: 20px;
  box-shadow: var(--shadow-sm); border: 1px solid var(--gray-200); transition: var(--transition);
}
[data-theme="dark"] .stat-card { background: var(--dark-2); border-color: var(--gray-200); }
.stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-1px); }
.stat-card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
.stat-card-icon { width: 44px; height: 44px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1.25rem; }
.stat-card-value { font-size: 1.5rem; font-weight: 700; margin-bottom: 4px; }
.stat-card-label { font-size: .8125rem; color: var(--gray-500); }
.stat-card-change { font-size: .75rem; margin-top: 8px; }
.stat-card-change.positive { color: var(--success); }
.stat-card-change.negative { color: var(--danger); }

.card-custom {
  background: #fff; border-radius: var(--border-radius); box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200); overflow: hidden;
}
[data-theme="dark"] .card-custom { background: var(--dark-2); border-color: var(--gray-200); }
.card-custom-header {
  padding: 16px 20px; border-bottom: 1px solid var(--gray-200);
  display: flex; justify-content: space-between; align-items: center;
}
.card-custom-title { font-size: 1rem; font-weight: 600; }
.card-custom-body { padding: 20px; }

/* Tables */
.table-custom { width: 100%; border-collapse: collapse; }
.table-custom th { padding: 12px 16px; text-align: left; font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--gray-500); background: var(--gray-50); border-bottom: 1px solid var(--gray-200); }
[data-theme="dark"] .table-custom th { background: var(--dark-3); }
.table-custom td { padding: 12px 16px; font-size: .875rem; border-bottom: 1px solid var(--gray-100); }
.table-custom tr:hover td { background: var(--gray-50); }
[data-theme="dark"] .table-custom tr:hover td { background: var(--dark-3); }

/* Buttons */
.btn-primary-custom {
  background: var(--primary); color: #fff; border: none; padding: 8px 16px;
  border-radius: 6px; font-size: .875rem; font-weight: 500; cursor: pointer;
  transition: var(--transition); display: inline-flex; align-items: center; gap: 6px;
}
.btn-primary-custom:hover { background: var(--primary-dark); }
.btn-secondary-custom {
  background: var(--gray-100); color: var(--gray-700); border: 1px solid var(--gray-200);
  padding: 8px 16px; border-radius: 6px; font-size: .875rem; cursor: pointer; transition: var(--transition);
}
.btn-secondary-custom:hover { background: var(--gray-200); }
.btn-success-custom { background: var(--success); color: #fff; border: none; padding: 8px 16px; border-radius: 6px; font-size: .875rem; cursor: pointer; }
.btn-danger-custom { background: var(--danger); color: #fff; border: none; padding: 8px 16px; border-radius: 6px; font-size: .875rem; cursor: pointer; }

/* Badges */
.badge-custom { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 20px; font-size: .75rem; font-weight: 500; }
.badge-success { background: var(--secondary-light); color: var(--secondary-dark); }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-info { background: var(--primary-light); color: var(--primary-dark); }

/* Form */
.form-control-custom {
  width: 100%; padding: 10px 14px; border: 1px solid var(--gray-200);
  border-radius: 6px; font-size: .875rem; background: #fff; transition: var(--transition); outline: none;
}
[data-theme="dark"] .form-control-custom { background: var(--dark-3); border-color: var(--gray-200); color: var(--gray-900); }
.form-control-custom:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
.form-label-custom { display: block; font-size: .8125rem; font-weight: 500; margin-bottom: 6px; color: var(--gray-700); }

/* Toast */
.toast-container { position: fixed; top: 80px; right: 24px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.toast-custom {
  padding: 12px 20px; border-radius: 8px; color: #fff; font-size: .875rem;
  box-shadow: var(--shadow-lg); animation: slideIn .3s ease; min-width: 300px;
  display: flex; align-items: center; gap: 10px;
}
.toast-custom.success { background: var(--success); }
.toast-custom.error { background: var(--danger); }
.toast-custom.warning { background: var(--warning); }
.toast-custom.info { background: var(--info); }

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

/* Login Page */
.login-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
}

.login-card {
  background: #fff; border-radius: 16px; padding: 48px 40px; width: 100%;
  max-width: 420px; box-shadow: var(--shadow-lg);
}

.login-logo { text-align: center; margin-bottom: 32px; }
.login-logo img { height: 72px; margin-bottom: 12px; }
.login-logo h1 { font-size: 1.75rem; font-weight: 700; color: var(--dark); }
.login-logo p { font-size: .8125rem; color: var(--gray-500); margin-top: 4px; }

.login-form .form-group { margin-bottom: 20px; }
.login-form label { font-size: .8125rem; font-weight: 500; color: var(--gray-700); display: block; margin-bottom: 6px; }
.login-form input {
  width: 100%; padding: 12px 16px; border: 1px solid var(--gray-200);
  border-radius: 8px; font-size: .9375rem; outline: none; transition: var(--transition);
}
.login-form input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }

.login-btn {
  width: 100%; padding: 12px; background: var(--primary); color: #fff; border: none;
  border-radius: 8px; font-size: 1rem; font-weight: 600; cursor: pointer; transition: var(--transition);
}
.login-btn:hover { background: var(--primary-dark); }
.login-btn:disabled { opacity: .6; cursor: not-allowed; }

.login-links { text-align: center; margin-top: 20px; }
.login-links a { color: var(--primary); text-decoration: none; font-size: .875rem; }

/* Quick Actions */
.quick-actions { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 12px; }
.quick-action {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 16px 8px; background: #fff; border: 1px solid var(--gray-200);
  border-radius: var(--border-radius); text-decoration: none; color: var(--gray-700);
  transition: var(--transition); cursor: pointer;
}
[data-theme="dark"] .quick-action { background: var(--dark-2); }
.quick-action:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow); }
.quick-action i { font-size: 1.5rem; }
.quick-action span { font-size: .75rem; text-align: center; }

/* Progress Bar */
.progress-custom { height: 8px; background: var(--gray-200); border-radius: 4px; overflow: hidden; }
.progress-bar-custom { height: 100%; background: linear-gradient(90deg, var(--primary), var(--secondary)); border-radius: 4px; transition: width .5s ease; }

/* Charts */
.chart-container { position: relative; height: 300px; }

/* Modal */
.modal-custom { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 2000; }
.modal-custom.show { display: flex; align-items: center; justify-content: center; }
.modal-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,.5); }
.modal-content-custom {
  position: relative; background: #fff; border-radius: 12px; width: 100%;
  max-width: 560px; max-height: 90vh; overflow-y: auto; box-shadow: var(--shadow-lg);
}
[data-theme="dark"] .modal-content-custom { background: var(--dark-2); }
.modal-header-custom { padding: 20px 24px; border-bottom: 1px solid var(--gray-200); display: flex; justify-content: space-between; align-items: center; }
.modal-body-custom { padding: 24px; }
.modal-footer-custom { padding: 16px 24px; border-top: 1px solid var(--gray-200); display: flex; justify-content: flex-end; gap: 8px; }

/* Pagination */
.pagination-custom { display: flex; align-items: center; gap: 4px; justify-content: center; margin-top: 20px; }
.pagination-btn {
  padding: 6px 12px; border: 1px solid var(--gray-200); background: #fff;
  border-radius: 6px; font-size: .8125rem; cursor: pointer; transition: var(--transition);
}
[data-theme="dark"] .pagination-btn { background: var(--dark-3); }
.pagination-btn:hover { background: var(--gray-100); }
.pagination-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Loading */
.loading-spinner { display: inline-block; width: 20px; height: 20px; border: 2px solid var(--gray-200); border-top-color: var(--primary); border-radius: 50%; animation: spin .6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Empty State */
.empty-state { text-align: center; padding: 48px 20px; color: var(--gray-400); }
.empty-state i { font-size: 3rem; margin-bottom: 12px; }
.empty-state p { font-size: .9375rem; }

/* Rank Badge */
.rank-badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border-radius: 20px; font-size: .75rem; font-weight: 600; }

/* Member Node (Genealogy) */
.member-node {
  display: inline-flex; flex-direction: column; align-items: center; padding: 12px;
  background: #fff; border: 2px solid var(--gray-200); border-radius: 12px;
  min-width: 140px; cursor: pointer; transition: var(--transition);
}
.member-node:hover { border-color: var(--primary); box-shadow: var(--shadow-md); }
.member-node.active { border-color: var(--success); }
.member-node.inactive { border-color: var(--danger); opacity: .7; }
.member-node-name { font-size: .8125rem; font-weight: 600; }
.member-node-code { font-size: .6875rem; color: var(--gray-500); }
.member-node-rank { font-size: .625rem; padding: 2px 6px; border-radius: 4px; color: #fff; margin-top: 4px; }

/* Responsive */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); width: 260px; }
  .sidebar.mobile-open { transform: translateX(0); }
  .main-content { margin-left: 0 !important; }
  .page-content { padding: 16px; }
  .stat-card { padding: 16px; }
  .stat-card-value { font-size: 1.25rem; }
  .topbar { padding: 0 16px; }
  .topbar-search { display: none; }
  .topbar-user-info { display: none; }
  .quick-actions { grid-template-columns: repeat(3, 1fr); }
  .login-card { margin: 16px; padding: 32px 24px; }
}

@media (max-width: 480px) {
  .quick-actions { grid-template-columns: repeat(2, 1fr); }
}

/* Print */
@media print {
  .sidebar, .topbar { display: none !important; }
  .main-content { margin-left: 0 !important; }
  .page-content { padding: 0; }
}