body {
    font-family: Arial, sans-serif;
    padding: 40px;
    background: #f8f8f8;
}

.concentric-wrapper {
    text-align: center;
}

.concentric-circle {
    transform: rotate(-90deg);
}

circle {
    fill: none;
    stroke-width: 10;
    transition: stroke-dashoffset 1s ease-in-out;
}

.bg {
    stroke: #eee;
}

.progress {
    stroke-dasharray: 0;
    stroke-dashoffset: 0;
}

.legend {
    text-align: center;
    margin-top: 20px;
}

.legend-item {
    display: inline-block;
    margin: 0 10px;
}

.legend-box {
    width: 12px;
    height: 12px;
    display: inline-block;
    margin-right: 5px;
}