body { 
    background-color: #f4f7f6; 
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
}

.card { 
    border: none; 
    border-radius: 15px; 
    box-shadow: 0 4px 6px rgba(0,0,0,0.1); 
    transition: transform 0.2s; 
}

.card:hover { 
    transform: translateY(-5px); 
}

.stat-value { 
    font-size: 2.5rem; 
    font-weight: bold; 
    color: #2c3e50; 
}

.stat-unit { 
    font-size: 1rem; 
    color: #7f8c8d; 
}

.header-bg { 
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%); 
    color: white; 
    padding: 2rem 0; 
    margin-bottom: 2rem; 
    border-radius: 0 0 25px 25px; 
}

#last-update {
    transition: all 0.5s ease;
}