html {
    font-family: ´Arial`, san-serif;
    background: linear-gradient(to right #d03d977a, #82d78dca);
    height: 100vh;
    display: flex;
    justify-content: center;
    aligh-items: center;
}
body {
    width: 50%
    max-width: 50%
    margin: 0 auto
    background: #ffffff;
    padding: 20px;
    border-radius: 10px
    box-shadow: 0 4-x 8px rgba(0, 0, 0, 0.2);
}

h1{
    text-align: center;
    font-size: 2,5em;
    color: #333;
    margin-bottom: 20px;
}

.formulario{
    display: flex;
    flex-direction: column;
    align-items: center;
}

.formulario input[type="number"]{
    width: 200x;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid: #cccccc;
    font-size: 1.1em;
    
}

.formulario input[type="submit"]{
    padding: 10px 20px;
    background-color: #28a745;
    color: #ffffff;
    border: none;
    border-radius: 5px;
    font-size: 1.1em;
    cursor: pointer;
    trnsition: background-color 0.3s ease;

}
    
}