* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 500px;
    padding: 20px;
}

.form-box {
    background-color: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
}

h1 {
    color: #333;
    margin-bottom: 15px;
}

p {
    color: #666;
    margin-bottom: 25px;
}

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

input[type="email"] {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s;
}

input[type="email"]:focus {
    border-color: #4CAF50;
}

.submit-btn {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

.submit-btn:hover {
    background-color: #45a049;
}

#message {
    margin-top: 20px;
    padding: 15px;
    border-radius: 5px;
}

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

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

.hidden {
    display: none;
}