body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #F4F4F4;
}
.step, .header, .conversion {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 2fr;
    gap: 10px;
    align-items: center;
    margin-bottom: 10px;
}
.step input, .header span, .conversion span {
    width: 100%;
    box-sizing: border-box;
    padding: 5px;
}
input[type="number"], .header span:nth-child(2), .header span:nth-child(3), .conversion span:nth-child(2), .conversion span:nth-child(3) {
    text-align: right;
}
button {
    margin-right: 5px;
    padding: 5px 10px;
    background-color: #5F52FF;
    color: white;
    border: none;
    cursor: pointer;
}
.header, .conversion {
    font-weight: bold;
}
.conversion {
    margin-top: 20px;
    border-top: 2px solid #1A1A1A;
    padding-top: 10px;
}
#addStepBtn, #applyWhatIfBtn {
    margin-top: 10px;
    padding: 10px;
    font-size: 16px;
    background-color: #4C22B6;
}
#funnelVisualization {
    margin-top: 40px;
    width: 100%;
    height: 500px;
}
#whatIfScenario {
    margin-top: 20px;
    padding: 10px;
    border: 1px solid #1A1A1A;
    background-color: #FFFFFF;
}
#whatIfScenario select, #whatIfScenario input {
    margin-right: 10px;
}
#whatIfConversion {
    margin-top: 10px;
    font-weight: bold;
}