html, body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f7f8;
    color: #333;
    text-align: center;
    overflow-x: hidden;
    width: 100%;
    margin: 0;
    padding: 0;
}

form {
    background: white;
    margin: 20px auto;
    padding: 30px 40px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    max-width: 500px;
    width: 90%;
    box-sizing: border-box;
}

input[type="text"],
input[type="email"],
input[type="number"] {
    width: 100%;
    padding: 12px 15px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 16px;
    box-sizing: border-box;
}

.back,
button {
    background-color: #528ff0;
    color: white;
    padding: 12px 18px;
    font-size: 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    width: 100%;
    margin-top: 15px;
}

button:hover,
.back:hover {
    background-color: #4078d4;
}

h2 {
    color: #528ff0;
    margin-bottom: 20px;
}

a {
    display: inline-block;
    margin-top: 20px;
    color: #528ff0;
    text-decoration: none;
    font-weight: bold;
}

a:hover {
    text-decoration: underline;
}

.message {
    max-width: 400px;
    margin: 20px auto;
    padding: 20px;
    border-radius: 6px;
    font-size: 18px;
    box-sizing: border-box;
}

.success {
    background: #e0f6e9;
    color: #237849;
    border: 1px solid #9ddfb2;
}

.error {
    color: #c03e3e;
}

/* Mobile Styles */
@media (max-width: 480px) {
    form {
        padding: 20px 15px !important;
    }

    input,
    .back,
    button {
        font-size: 15px;
    }

    h2 {
        font-size: 20px;
    }

    .message {
        font-size: 16px;
    }
}