body {
    background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
    background-size: 400% 400%;
    animation: gradient 15s ease infinite;
    height: 100vh;
    font-family: 'Roboto', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.container {
    background: #ffffff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    max-width: 400px;
    width: 100%;
}

h1 {
    margin-bottom: 20px;
    font-weight: 700;
}

form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

input {
    padding: 10px;
    border: 1px solid #dddddd;
    border-radius: 5px;
    width: calc(100% - 22px);
    font-size: 16px;
}

button {
    padding: 10px;
    background-color: #6e8efb;
    border: none;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
    font-size: 16px;
}

button:hover {
    background-color: #5b73d8;
}

#result {
    margin-top: 20px;
    font-size: 1.2em;
    font-weight: 700;
}

#tip {
    margin-top: 10px;
    font-size: 1em;
    font-style: italic;
}