* {
    box-sizing: border-box;
}

body {
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    padding: 0;
    margin: 0;
}

main.container {
    width: 100%;
    height: 100vh;
    background-color: rgba(249, 225, 8, 0.744);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.container h1 {
    font-size: 46px;
    margin: 0;
}

section.username {
    width: 100%;
    height: 100%;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

section.username span {
    display: block;
    font-size: 22px;
    margin-bottom: 12px;
}

.username input {
    width: 100%;
    padding: 8px 14px;
    border: none;
    border-radius: 8px;
}

#start {
    display: block;
    width: 200px;
    margin: 12px auto;
    padding: 8px 12px;
    background-color: transparent;
    border: 1px solid #201f1f;
    border-radius: 8px;
    cursor: pointer;
    font-size: 24px;
    transition: all 0.5s ease-in-out;
}

#start:hover {
    background-color: #201f1f;
    color: aliceblue;
}