html,body{
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    background-color: #f5f5f5;
    font-size: 1.2rem;
    font-weight: 700;
}
.shell-index {
    margin: 0;
    padding: 0;
    justify-content: center;
    align-items: center;
    display: flex;
    height: 100vh;
    width: 100%;
    flex-direction: column;
    line-height: 2;
    font-size: 26px;
}
a{
    color: #2b5900;
    text-decoration: none;
}
a:hover{
    color: #52b76b;
}