body {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    min-height: 100vh;
}

.card {
    border-radius: 12px;
    border: none;
    transition: transform 0.2s ease-in-out;
}

.nav-tabs .nav-link {
    border: none;
    color: #6c757d;
    font-weight: 500;
}

.nav-tabs .nav-link.active {
    color: #0d6efd;
    border-bottom: 2px solid #0d6efd;
    background: none;
}

.line-item {
    border-left: 4px solid #0d6efd;
    background-color: #f8f9fa;
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 0 8px 8px 0;
}

pre {
    max-height: 400px;
    overflow-y: auto;
}

@media print {
    .container {
        width: 100%;
        max-width: none;
    }

    .card-footer,
    #analyzeBtn,
    #sampleBtn,
    #clearBtn,
    #billText,
    label,
    .form-check,
    header,
    .copyright-float {
        display: none !important;
    }

    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
}

.copyright-float {
    position: fixed;
    bottom: 1rem;
    right: 1.5rem;
    font-size: 0.8rem;
    z-index: 1000;
    padding: 2px 8px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 4px;
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}