body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background: #35424a;
    color: #ffffff;
    padding: 10px 0;
    text-align: center;
}

h1 {
    margin: 0;
}

.container {
    width: 80%;
    margin: auto;
    overflow: hidden;
}

form {
    margin: 20px 0;
    padding: 20px;
    background: #ffffff;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

input[type="email"] {
    width: 70%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 5px;
}

input[type="submit"] {
    background: #35424a;
    color: #ffffff;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 5px;
}

input[type="submit"]:hover {
    background: #45a049;
}

.message {
    margin: 20px 0;
    padding: 10px;
    border-radius: 5px;
}

.success {
    background: #dff0d8;
    color: #3c763d;
}

.error {
    background: #f2dede;
    color: #a94442;
}