body {
    background: #f0f4ff;
    font-family: 'Segoe UI', sans-serif;
}
.navbar { box-shadow: 0 2px 8px rgba(0,0,0,0.15); }
.card { border: none; border-radius: 16px; box-shadow: 0 2px 12px rgba(0,0,0,0.07); }
.card-header { border-radius: 16px 16px 0 0 !important; }
.sidebar { min-height: calc(100vh - 70px); background: white; box-shadow: 2px 0 8px rgba(0,0,0,0.05); }
.sidebar .nav-link { color: #555; border-radius: 10px; margin: 2px 8px; padding: 10px 16px; }
.sidebar .nav-link:hover, .sidebar .nav-link.active { background: #e8f0fe; color: #1a73e8; }
.sidebar .nav-link i { margin-right: 10px; }
.stat-card { border-left: 4px solid; border-radius: 12px; }
.badge-tag { background: #e8f0fe; color: #1a73e8; padding: 4px 10px; border-radius: 20px; font-size: 13px; }
.btn-primary { background: #1a73e8; border-color: #1a73e8; }
.btn-primary:hover { background: #1557b0; }
.avatar { width: 48px; height: 48px; border-radius: 50%; background: #e8f0fe; display: flex; align-items: center; justify-content: center; font-size: 20px; }
.child-card:hover { transform: translateY(-3px); transition: 0.2s; box-shadow: 0 6px 20px rgba(0,0,0,0.12) !important; }