.bmi-container {
    max-width: 600px;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    border-radius: 30px;
    padding: 2rem;
}

.bmi-input {
    font-size: 1.2rem;
    padding: 1rem;
    border-radius: 15px;
    border: 2px solid var(--secondary-color);
    background-color: #f8f9fa;
    color: var(--text-dark);
    text-align: center;
    font-weight: bold;
}

.bmi-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 10px rgba(255, 20, 147, 0.3);
    outline: none;
}

.unit-selector {
    display: flex;
    background-color: var(--secondary-color);
    border-radius: 25px;
    padding: 0.25rem;
    margin-bottom: 1rem;
}

.unit-btn {
    flex: 1;
    padding: 0.75rem;
    border: none;
    border-radius: 20px;
    background-color: transparent;
    color: var(--text-dark);
    font-weight: bold;
    transition: all 0.3s ease;
}

.unit-btn.active {
    background-color: white;
    color: var(--primary-color);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.calculate-btn {
    background-color: var(--primary-color);
    color: white;
    border: 2px solid var(--primary-color);
    border-radius: 25px;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    font-weight: bold;
    transition: all 0.3s ease;
}

.calculate-btn:hover {
    background-color: #e91e63;
    border-color: #e91e63;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 20, 147, 0.3);
}

.bmi-result {
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    padding: 2rem;
    margin-top: 2rem;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    border: 3px solid var(--secondary-color);
}

.bmi-score {
    font-size: 3rem;
    font-weight: bold;
    color: var(--primary-color);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.bmi-category {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.bmi-recommendation {
    background-color: rgba(52, 144, 220, 0.1);
    border-left: 4px solid var(--accent-color);
    padding: 1rem;
    border-radius: 10px;
    margin-top: 1rem;
}

.bmi-categories {
    background-color: rgba(108, 117, 125, 0.1);
    border-radius: 15px;
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.category-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem;
    border-radius: 10px;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.category-underweight {
    background-color: rgba(23, 162, 184, 0.2);
    color: #17a2b8;
}

.category-normal {
    background-color: rgba(40, 167, 69, 0.2);
    color: #28a745;
}

.category-overweight {
    background-color: rgba(255, 193, 7, 0.2);
    color: #ffc107;
}

.category-obese {
    background-color: rgba(220, 53, 69, 0.2);
    color: #dc3545;
}

.input-group {
    background-color: white;
    border-radius: 15px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    border: 2px solid var(--secondary-color);
}

.input-label {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* Responsive design */
@media (max-width: 768px) {
    .bmi-container {
        padding: 1.5rem;
        max-width: 500px;
    }
    
    .bmi-score {
        font-size: 2.5rem;
    }
    
    .bmi-category {
        font-size: 1.3rem;
    }
    
    .calculate-btn {
        width: 100%;
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .bmi-container {
        padding: 1rem;
    }
    
    .bmi-score {
        font-size: 2rem;
    }
    
    .input-group {
        padding: 1rem;
    }
    
    .category-item {
        flex-direction: column;
        text-align: center;
    }
}