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

header {
    background-color: #35424a;
    color: #ffffff;
    padding: 10px 0;
    text-align: center;
    font-size: 2em;
    font-weight: bold;
}

main {
    padding: 20px;
}

footer {
    background-color: #35424a;
    color: #ffffff;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    width: 100%;
    bottom: 0;
}

.container {
    max-width: 600px;
    margin: 50px auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

label {
    display: block;
    margin-bottom: 10px;
    font-weight: bold;
    text-align: center;
}

input[type="text"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 20px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

button {
    width: 100%;
    padding: 10px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
}

button:hover {
    background-color: #45a049;
}

.result {
    margin-top: 20px;
    font-size: 1.2em;
    color: #333;
    text-align: center;
}


@media (max-width: 767px) {
    .container {
        width: 90%;
        margin: 20px auto;
        padding: 15px;
    }
}