.speed-gauge { text-align: center; }
.gauge-circle {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto 10px;
    border: 6px solid #e9ecef;
    transition: border-color 0.3s;
}
.gauge-circle.download { border-color: #198754; }
.gauge-circle.upload { border-color: #0e76a8; }
.gauge-circle.ping { border-color: #ffc107; }
.gauge-value {
    font-size: 2rem;
    font-weight: bold;
    line-height: 1;
    color: #333;
}
.gauge-unit {
    font-size: 0.85rem;
    color: #999;
}
.gauge-label {
    font-weight: 600;
    color: #555;
    margin-top: 5px;
}

@media (max-width: 576px) {
    .gauge-circle {
        width: 110px;
        height: 110px;
        border-width: 5px;
    }
    .gauge-value {
        font-size: 1.4rem;
    }
    .gauge-unit {
        font-size: 0.7rem;
    }
}