.bmi-gauge-container {
    position: relative;
    margin: 30px 0;
    padding: 20px 0;
}

.bmi-gauge {
    display: flex;
    height: 20px;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 10px;
}

.bmi-gauge-section {
    height: 100%;
}

.bmi-underweight {
    background-color: #3498db;
    width: 10%;
}

.bmi-normal {
    background-color: #2ecc71;
    width: 27%;
}

.bmi-overweight {
    background-color: #f39c12;
    width: 21%;
}

.bmi-obese {
    background-color: #e74c3c;
    width: 42%;
}

.bmi-gauge-marker {
    position: absolute;
    top: 10px;
    width: 2px;
    height: 40px;
    background-color: #000;
    transform: translateX(-50%);
}

.bmi-gauge-labels {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: #666;
}

.bmi-value-container {
    text-align: center;
    margin-bottom: 20px;
}

.bmi-category {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 4px;
    font-weight: 600;
    margin-top: 10px;
}

.bmi-severe-underweight,
.bmi-underweight {
    background-color: #d6eaf8;
    color: #2874a6;
}

.bmi-normal {
    background-color: #d5f5e3;
    color: #1e8449;
}

.bmi-overweight {
    background-color: #fef9e7;
    color: #b7950b;
}

.bmi-obese {
    background-color: #fadbd8;
    color: #b03a2e;
}

.bmi-interpretation,
.bmi-recommendations {
    margin: 20px 0;
    padding: 15px;
    border-radius: 8px;
    background-color: #f8f9fa;
}

.bmi-recommendations h4 {
    margin-top: 0;
    color: #1a73e8;
}

.calculator-tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid #ddd;
}

.calculator-tab {
    padding: 10px 20px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-weight: 600;
    color: #666;
    transition: all 0.3s ease;
}

.calculator-tab:hover {
    color: #1a73e8;
}

.calculator-tab.active {
    color: #1a73e8;
    border-bottom-color: #1a73e8;
}

@media (max-width: 767px) {
    .calculator-tabs {
        flex-direction: row;
        overflow-x: auto;
    }
    
    .calculator-tab {
        flex: 1;
        text-align: center;
        white-space: nowrap;
    }
    
    .bmi-gauge-labels {
        font-size: 10px;
    }
}