Untitled

<!DOCTYPE html>
<html lang="id">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Kalkulator BMI</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            min-height: 100vh;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }

        .container {
            background: rgba(255, 255, 255, 0.9);
            padding: 30px;
            border-radius: 20px;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
            width: 100%;
            max-width: 500px;
        }

        h1 {
            text-align: center;
            color: #2d3748;
            margin-bottom: 30px;
            font-size: 2.5em;
        }

        .form-group {
            margin-bottom: 20px;
        }

        label {
            display: block;
            margin-bottom: 8px;
            color: #4a5568;
            font-weight: 600;
        }

        input {
            width: 100%;
            padding: 12px;
            border: 2px solid #cbd5e0;
            border-radius: 8px;
            font-size: 16px;
            transition: border-color 0.3s ease;
        }

        input:focus {
            outline: none;
            border-color: #667eea;
        }

        button {
            width: 100%;
            padding: 14px;
            background: #667eea;
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s ease;
        }

        button:hover {
            background: #5a67d8;
        }

        .result {
            margin-top: 30px;
            padding: 20px;
            border-radius: 8px;
            text-align: center;
            display: none;
        }

        .result.normal {
            background: #c6f6d5;
            border: 2px solid #48bb78;
        }

        .result.warning {
            background: #feebc8;
            border: 2px solid #ed8936;
        }

        .result.danger {
            background: #fed7d7;
            border: 2px solid #f56565;
        }

        .result h2 {
            color: #2d3748;
            margin-bottom: 10px;
        }

        .result p {
            color: #4a5568;
            font-size: 18px;
        }

        @media (max-width: 480px) {
            .container {
                padding: 20px;
            }

            h1 {
                font-size: 2em;
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>Kalkulator BMI</h1>
        <form action="proses.php" method="POST">
            <div class="form-group">
                <label for="berat">Berat Badan (kg)</label>
                <input type="number" step="0.1" id="berat" name="berat" required>
            </div>
            <div class="form-group">
                <label for="tinggi">Tinggi Badan (cm)</label>
                <input type="number" step="0.1" id="tinggi" name="tinggi" required>
            </div>
            <button type="submit">Hitung BMI</button>
        </form>
        <?php if(isset($_GET['bmi']) && isset($_GET['kategori'])): ?>
        <div class="result <?php echo strtolower($_GET['kategori']); ?>">
            <h2>Hasil Perhitungan</h2>
            <p>BMI Anda: <?php echo number_format($_GET['bmi'], 1); ?></p>
            <p>Kategori: <?php echo $_GET['kategori']; ?></p>
        </div>
        <?php endif; ?>
    </div>
</body>
</html>
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