* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #1565C0; --primary-dark: #0D47A1; --primary-light: #42A5F5;
    --secondary: #00897B; --danger: #D32F2F; --success: #2E7D32;
    --warning: #F57C00; --info: #0288D1;
    --bg: #F0F2F5; --card-bg: #FFFFFF; --text: #1A1A2E; --text-secondary: #5F6368;
    --border: #E0E0E0; --sidebar-bg: #0D2137; --sidebar-hover: #1A3A5C;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    --radius: 12px; --radius-sm: 8px;
}
body { font-family: 'Segoe UI', system-ui, sans-serif; background: var(--bg); color: var(--text); line-height: 1.5; }

/* Login */
.login-container { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--sidebar-bg) 0%, #1a3a5c 100%); }
.login-card { background: white; padding: 48px 40px; border-radius: 16px; width: 420px; max-width: 90%; box-shadow: 0 25px 60px rgba(0,0,0,0.3); }
.login-header { text-align: center; margin-bottom: 32px; }
.login-header i { font-size: 56px; color: var(--primary); margin-bottom: 12px; }
.login-header h2 { color: var(--primary-dark); font-size: 24px; margin-bottom: 4px; }
.login-header p { color: var(--text-secondary); font-size: 13px; }
.login-header .login-subtitle { font-weight: 600; color: var(--text); margin-top: 8px; }
.login-form .form-group { margin-bottom: 20px; }
.login-form label { display: block; margin-bottom: 6px; font-weight: 500; font-size: 14px; }
.login-form label i { margin-right: 6px; color: var(--primary); width: 16px; }
.login-form input { width: 100%; padding: 12px 16px; border: 2px solid var(--border); border-radius: var(--radius-sm); font-size: 14px; transition: border-color 0.2s; }
.login-form input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(21,101,192,0.1); }

/* App Layout */
.app-container { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar { width: 260px; background: var(--sidebar-bg); color: white; position: fixed; left: 0; top: 0; bottom: 0; z-index: 100; transition: transform 0.3s; overflow-y: auto; }
.sidebar-header { padding: 20px 24px; font-size: 18px; font-weight: 700; display: flex; align-items: center; gap: 12px; border-bottom: 1px solid rgba(255,255,255,0.08); letter-spacing: 1px; }
.sidebar-header i { color: var(--primary-light); font-size: 24px; }
.sidebar-nav { padding: 12px 0; }
.sidebar-nav a { display: flex; align-items: center; gap: 12px; padding: 11px 24px; color: rgba(255,255,255,0.6); text-decoration: none; transition: all 0.2s; font-size: 14px; border-left: 3px solid transparent; }
.sidebar-nav a:hover { background: var(--sidebar-hover); color: white; }
.sidebar-nav a.active { background: var(--sidebar-hover); color: white; border-left-color: var(--primary-light); }
.sidebar-nav a i { width: 20px; text-align: center; font-size: 15px; }
.sidebar-nav a span { white-space: nowrap; }
.logout-link { margin-top: 16px; border-top: 1px solid rgba(255,255,255,0.08); padding-top: 16px; }
.logout-link:hover { color: var(--danger) !important; border-left-color: var(--danger) !important; }

/* Main Content */
.main-content { margin-left: 260px; flex: 1; display: flex; flex-direction: column; min-height: 100vh; }
.topbar { display: flex; align-items: center; padding: 16px 32px; background: white; box-shadow: var(--shadow); position: sticky; top: 0; z-index: 50; gap: 16px; }
.menu-toggle { display: none; background: none; border: none; font-size: 20px; cursor: pointer; color: var(--text); }
.topbar h1 { font-size: 18px; font-weight: 600; text-transform: capitalize; flex: 1; }
.topbar-right { display: flex; align-items: center; gap: 12px; }
.user-name { font-weight: 600; font-size: 14px; }
.user-role { font-size: 12px; color: var(--text-secondary); background: var(--bg); padding: 4px 12px; border-radius: 20px; }
.content { padding: 24px 32px; flex: 1; }

/* Cards */
.card { background: white; border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; margin-bottom: 20px; }
.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.card-header h3 { font-size: 16px; font-weight: 600; }

/* Stats */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: white; border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); display: flex; align-items: center; gap: 16px; transition: transform 0.2s; }
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.stat-icon { width: 52px; height: 52px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 22px; flex-shrink: 0; }
.stat-icon.blue { background: #E3F2FD; color: var(--primary); }
.stat-icon.green { background: #E8F5E9; color: var(--success); }
.stat-icon.orange { background: #FFF3E0; color: var(--warning); }
.stat-icon.red { background: #FFEBEE; color: var(--danger); }
.stat-icon.teal { background: #E0F2F1; color: var(--secondary); }
.stat-icon.purple { background: #F3E5F5; color: #7B1FA2; }
.stat-info h3 { font-size: 26px; font-weight: 700; line-height: 1.2; }
.stat-info p { color: var(--text-secondary); font-size: 13px; margin-top: 2px; }

/* Tables */
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
table th, table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
table th { background: #F8F9FA; font-weight: 600; color: var(--text-secondary); white-space: nowrap; }
table tr:hover { background: #F8F9FA; }

/* Badges */
.badge { padding: 4px 10px; border-radius: 20px; font-size: 11px; font-weight: 600; white-space: nowrap; }
.badge-success { background: #E8F5E9; color: var(--success); }
.badge-danger { background: #FFEBEE; color: var(--danger); }
.badge-warning { background: #FFF3E0; color: var(--warning); }
.badge-info { background: #E3F2FD; color: var(--primary); }
.badge-purple { background: #F3E5F5; color: #7B1FA2; }
.badge-teal { background: #E0F2F1; color: var(--secondary); }
.badge-gray { background: #F5F5F5; color: #616161; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 500; font-size: 13px; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 10px 14px; border: 1.5px solid var(--border); border-radius: var(--radius-sm); font-size: 14px; font-family: inherit; transition: border-color 0.2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(21,101,192,0.08); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

/* Buttons */
.btn { padding: 10px 20px; border: none; border-radius: var(--radius-sm); cursor: pointer; font-size: 14px; font-weight: 500; display: inline-flex; align-items: center; gap: 8px; transition: all 0.2s; text-decoration: none; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #1B5E20; }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #B71C1C; }
.btn-warning { background: var(--warning); color: white; }
.btn-outline { background: white; border: 1.5px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-block { width: 100%; justify-content: center; }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* Search */
.search-bar { display: flex; gap: 12px; margin-bottom: 20px; }
.search-bar input { flex: 1; padding: 10px 16px; border: 1.5px solid var(--border); border-radius: var(--radius-sm); font-size: 14px; }

/* Charts */
.charts-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 24px; }
.chart-container { position: relative; height: 300px; }

/* Modal */
.modal-overlay { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); align-items: center; justify-content: center; z-index: 1000; }
.modal-overlay.active { display: flex; }
.modal { background: white; border-radius: var(--radius); width: 600px; max-width: 90%; max-height: 85vh; overflow-y: auto; padding: 28px; box-shadow: var(--shadow-lg); }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.modal-header h2 { font-size: 18px; font-weight: 600; }
.modal-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-secondary); padding: 4px; }

/* Alerts */
.alert { padding: 14px 18px; border-radius: var(--radius-sm); margin-bottom: 16px; font-size: 14px; display: flex; align-items: center; gap: 10px; }
.alert-error { background: #FFEBEE; color: var(--danger); border: 1px solid #FFCDD2; }
.alert-success { background: #E8F5E9; color: var(--success); border: 1px solid #C8E6C9; }

/* Empty State */
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-secondary); }
.empty-state i { font-size: 64px; margin-bottom: 16px; opacity: 0.3; }
.empty-state h3 { font-size: 18px; color: var(--text); margin-bottom: 8px; }

/* Tabs */
.tabs { display: flex; gap: 0; border-bottom: 2px solid var(--border); margin-bottom: 20px; }
.tab { padding: 10px 20px; cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -2px; font-size: 14px; font-weight: 500; color: var(--text-secondary); transition: all 0.2s; }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }

/* Responsive */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .menu-toggle { display: block; }
    .charts-grid { grid-template-columns: 1fr; }
    .form-row, .form-row-3 { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .topbar { padding: 12px 16px; }
    .content { padding: 16px; }
    .topbar-right .user-role { display: none; }
}
@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
}