styles.css

* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body {
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    font-family: Arial, Helvetica, sans-serif;
    background-image: linear-gradient(#034f84, white);
}

form {
    display: flex;
    flex-direction: column;
    box-shadow: 0px 5px 10px gray, 0px 5px 20px gray;
    padding: 30px;
    background-color: white;
}

h1 {
    margin-bottom: 10px;
}

input {
    width: 100%;
    margin-bottom: 10px;
    height: 30px;
}

button {
    width: 100%;
    background-color: transparent;
    border: 2px solid black;
    height: 30px;
    font-weight: bold;
    transition: .2s;
    cursor: pointer;
}

button:hover {
    box-shadow: 0px 0px 20px black;
}

.letra-grande {
    font-size: 1.5rem;
}

#circle-result-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 10px;
    text-align: center;
    background-color: white;
    height: 50%;
    width: 50%;
    border-radius: 100%;
}