body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #F8F9FA;
}

.header-gradient {
    background: linear-gradient(135deg, #007BFF, #0056b3);
}

.upload-zone {
    border: 2px dashed #007BFF;
    border-radius: 0.5rem;
    padding: 4rem;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.2s ease-in-out;
}

.upload-zone.drag-over {
    background-color: #e9ecef;
}

.upload-zone .icon {
    width: 48px;
    height: 48px;
    stroke-width: 1.5;
    margin-bottom: 1rem;
}

.result-card {
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}