/* BMI Calculator Styles */

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background-color: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    padding: 30px;
    width: 100%;
    max-width: 500px;
    text-align: center;
}

h1 {
    color: #333;
    margin-bottom: 10px;
    font-size: 2.2rem;
}

.description {
    color: #666;
    margin-bottom: 30px;
    font-size: 1.1rem;
}

form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    text-align: left;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #444;
}

input[type="number"], select {
    width: 100%;
    padding: 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

input[type="number"]:focus, select:focus {
    outline: none;
    border-color: #667eea;
}

button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px;
    font-size: 1.1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    font-weight: 600;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.result {
    margin-top: 30px;
    padding: 20px;
    border-radius: 10px;
    background-color: #f8f9fa;
    border-left: 5px solid #667eea;
}

h2 {
    color: #333;
    margin-bottom: 15px;
}

.bmi-value {
    font-size: 2rem;
    font-weight: bold;
    color: #667eea;
    margin-bottom: 10px;
}

.bmi-category {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.bmi-percentile {
    font-size: 1.1rem;
    font-weight: 500;
    margin-top: 10px;
    color: #444;
}

.bmi-range {
    font-style: italic;
    color: #666;
    font-size: 0.9rem;
}

.error {
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.hidden {
    display: none;
}

/* Responsive design */
@media (max-width: 600px) {
    .container {
        padding: 20px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    .description {
        font-size: 1rem;
    }
    
    .bmi-value {
        font-size: 1.5rem;
    }
    
    button {
        padding: 12px;
        font-size: 1rem;
    }
}