body {
    background: linear-gradient(180deg, #f8f9fa 0%, #e9ecef 100%);
    min-height: 100vh;
}

.navbar {
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.bid-card {
    transition: all 0.2s ease;
    border-left: 3px solid #28a745;
}

.bid-card:hover {
    transform: translateX(3px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.alert {
    border-radius: 8px;
}