body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
}

.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: transform 0.2s;
}

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

.file-icon {
    font-size: 3rem;
    color: #0d6efd;
    margin-bottom: 1rem;
}

.dropzone {
    border: 2px dashed #0d6efd;
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    background-color: #e9ecef;
    cursor: pointer;
    transition: background-color 0.3s;
}

.dropzone:hover {
    background-color: #dde0e3;
}

.progress-height {
    height: 25px;
    font-size: 0.9rem;
    border-radius: 12px;
}