body {
    font-family: Arial, sans-serif;
    padding: 15px;
    margin: 0;
    background-color: lightyellow;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    flex-direction: column;
    font-size: 14px;  
}

h1 {
    color: navy;
    margin-bottom: 15px;
    font-size: 1.5em;  
}

input {
    width: 300px;  
    padding: 8px;
    margin: 8px 0;
    border: 1px solid lightgray;
    border-radius: 5px;
    font-size: 14px;
}

button {
    padding: 8px 16px;
    background-color: green;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;  
}

button:hover {
    background-color: darkgreen;
}

#body {
    margin-top: 15px;
    padding: 10px;
    background-color: lightblue;
    border-radius: 5px;
    width: 100%;
    max-width: 350px;  
    margin-left: auto;
    margin-right: auto;
}

#body div {
    padding: 8px;
    margin: 8px 0;
    background-color: lightgreen;
    border-radius: 5px;
    text-align: left;
    font-size: 14px;  
    box-shadow: 0 2px 4px (lightgray); 
}

#body div button {
    margin-top: 5px;
    padding: 6px 12px;
    background-color: red;
    border-radius: 5px;
    font-size: 14px;
}

#body div button:hover {
    background-color: darkred;
}

#body div p {
    margin: 0;
}

@media (max-width: 600px) {
    body {
        padding: 10px;
    }

    input, button {
        width: 100%;
        max-width: 100%;
    }

    #body {
        width: 100%;
        padding: 10px;
    }

    #body div {
        width: 100%;
        padding: 8px;
    }
}