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

body {
    background-color: cornflowerblue;
    background-image: linear-gradient(to up, cornflowerblue, royalblue);
    height: 100vh;
}

main, section {
    max-width: 500px;
    margin: 20px auto;
    background-color: white;
    padding: 15px;
    border-radius: 10px;
}

h1, h2 {
    color: royalblue;
    text-align: center;
    margin-bottom: 10px;
}

input[type=number] {
    width: 100%;
    background-color: lightgray;
    border: 1px solid black;
    border-radius: 5px;
    text-align: right;
    font-size: 2em;
    margin-bottom: 10px;
}

div#botoes {
    display: flex;
    flex-direction: column;
    justify-content: stretch;
}

button {
    background-color: royalblue;
    color: white;
    border: none;
    padding: 10px 20px;
    margin: 3px 0;
    font-size: 1.2em;
    border-radius: 5px;
}

table {
    border-collapse: collapse;
    font-size: 1.5em;
}

table td {
    border: 1px solid black;
    padding: 5px;
}