* { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: 'Poppins', sans-serif;
            background: linear-gradient(135deg, #ffe4ec, #ffccd5);
            padding: 40px 20px;
            color: #4a2c2a;
        }
        .container {
            max-width: 900px;
            margin: auto;
            background: #fff0f5;
            padding: 36px;
            border-radius: 20px;
            box-shadow: 0 8px 20px rgba(255, 105, 180, 0.2);
            border: 2px dashed #f8bbd0;
        }
        h1, h2 {
            text-align: center;
            color: #d63384;
            margin-bottom: 24px;
        }
        .identity {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-bottom: 32px;
            border-bottom: 1px dotted #f8bbd0;
            padding-bottom: 24px;
        }
        .identity img {
            width: 130px;
            height: 130px;
            border-radius: 20px;
            border: 4px solid #f48fb1;
            object-fit: cover;
            box-shadow: 0 4px 10px rgba(240, 98, 146, 0.3); 
        }
        .identity img:hover {
            transform: scale(1.05); 
        }

        .identity-info p {
            margin: 6px 0;
            color: #6d4c41;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
            background-color: #fffafc;
            border-radius: 12px;
            overflow: hidden;
            font-size: 14px;
        }
        th, td {
            padding: 12px 10px;
            text-align: center;
            border-bottom: 1px solid #f8bbd0;
        }
        th {
            background-color: #f06292;
            color: white;
        }
        tr:nth-child(even) {
            background-color: #fff0f5;
        }
        .highlight {
            background-color: #ffe0f0;
            border-left: 6px solid #ec407a;
            padding: 20px;
            border-radius: 12px;
            margin-top: 30px;
            color: #880e4f;
            font-size: 15px;
        }
        .btn-toggle {
            display: block;
            margin: 24px auto 0;
            background: #f06292;
            color: white;
            padding: 12px 20px;
            border: none;
            border-radius: 20px;
            font-weight: 600;
            cursor: pointer;
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
            transition: 0.3s ease;
        }
        .btn-toggle:hover {
            background: #ec407a;
        }
        #rumus {
            display: none;
            margin-top: 20px;
            background: #fff5f8;
            border-left: 4px solid #f06292;
            padding: 16px;
            border-radius: 10px;
            color: #6a1b4d;
        }
        ul {
            margin-top: 10px;
            padding-left: 18px;
        }
        @media (max-width: 640px) {
            .identity {
                flex-direction: column;
                align-items: flex-start;
            }
        }