body {
        font-family: Arial, sans-serif;
        background: #ffe6e6;
        display: flex;
        justify-content: center;
        align-items: center;
        height: 100vh;
    }
    .container {
        background: white;
        padding: 20px 30px;
        border-radius: 12px;
        box-shadow: 0px 4px 12px rgba(255, 0, 0, 0.3);
        width: 320px;
        text-align: center;
        border: 2px solid #ff4d4d;
    }
    h2 {
        margin-bottom: 15px;
        color: #cc0000;
    }
    input[type="number"], input[type="text"] {
        width: 90%;
        padding: 10px;
        margin: 8px 0;
        border: 1px solid #ff4d4d;
        border-radius: 6px;
        font-size: 14px;
    }
    input[type="submit"] {
        background: #e60000;
        color: white;
        padding: 10px 15px;
        border: none;
        border-radius: 6px;
        cursor: pointer;
        font-size: 14px;
        margin-top: 10px;
    }
    input[type="submit"]:hover {
        background: #cc0000;
    }
    h3 {
        margin-top: 15px;
        padding: 10px;
        background: #ffe6e6;
        border: 1px solid #ff4d4d;
        border-radius: 6px;
        color: #b30000;
    }