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<!DOCTYPE html>
<html lang="es">
<head>
<meta charset="UTF-8">
<title>Calculadora de Peso Ideal</title>
<style>
body {
font-family: sans-serif;
margin: 2rem;
}
.result {
background-color: #f8f9fa;
padding: 15px;
border-left: 4px solid #007bff;
margin-top: 20px;
}
</style>
</head>
<body>
<h2>Calculadora de Peso Ideal</h2>
<form method="POST" action="">
<label for="gender">Género:</label>
<select name="gender" id="gender" required>
<option value="male">Hombre</option>
<option value="female">Mujer</option>
</select>
<br><br>
<label for="height">Altura (en metros, ej: 1.70):</label>
<input type="number" name="height" id="height" step="0.01" min="1.40" max="2.20" required>
<br><br>
<label for="weight">Peso actual (en kg):</label>
<input type="number" name="weight" id="weight" step="0.1" required>
<br><br>
<button type="submit">Calcular Peso Ideal</button>
</form>
<hr>
<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
$gender = $_POST["gender"];
$height_cm = floatval($_POST["height"]) * 100;
$current_weight = floatval($_POST["weight"]);
$ideal_weight = 0;
if ($gender == "male") {
$ideal_weight = ($height_cm * 1.2) - 130;
} else {
$ideal_weight = $height_cm - 102;
}
$ideal_weight = round($ideal_weight);
echo "<div class =result></div>";
echo "<h3>Resultado</h3>";
$gender_text = ($gender === "male") ? "Hombre" : "Mujer";
$height_m = $height_cm / 100;
echo "<p>Tu peso actual: <strong>{$current_weight} kg</strong></p>";
echo "<p>Peso ideal para $gender_text de {$height_m}m: <strong>{$ideal_weight} kg</strong></p>";
}
?>
</body>
</html>