#benchmark-tool {
    max-width: 650px;
    margin: 0 auto;
    font-family: Arial, sans-serif;
}

.step {
    display: none;
    background: #ffffff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
    text-align: center;
}

.step.active {
    display: block;
}

.step h2 {
    font-size: 28px;
    margin-bottom: 25px;
}

.step input {
    width: 100%;
    padding: 14px;
    font-size: 16px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 6px;
}

.step button {
    background: #000;
    color: #fff;
    border: none;
    padding: 14px 30px;
    font-size: 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: 0.2s;
}

.step button:hover {
    background: #333;
}

.results {
    text-align: center;
}

#result-box {
    font-size: 22px;
    font-weight: bold;
    margin-top: 20px;
}

/* progress style optional */

.progress-bar {
    width: 100%;
    height: 6px;
    background: #eee;
    border-radius: 5px;
    margin-bottom: 30px;
}

.progress {
    height: 100%;
    width: 0%;
    background: #000;
    border-radius: 5px;
    transition: width .3s ease;
}