* {
    box-sizing: border-box;
  }
html, body {
    font-family: Montserrat, Arial, sans-serif;
    min-height: 100%;
    padding: 0;
    margin: 0;
}

/* button or link */

.btn {
    background-color: #C0C0C0;
    border: 1px;
    padding: 10px;
    border-radius: 5px;
    text-size-adjust: auto;
    color: black;
    font-size: 16px;
    margin: 4px;
    cursor:pointer;
}

.btn:hover {
    background-color: #778899;
}

.btn-link {
    color: black;
    padding: 10px;
    font-size: 16px;
}

.btn-link:hover {
    color: #0000FF;
    background-color: white;
    border-radius: 5px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}

.btn-red {
    background-color: #B22222;
    border: 1px;
    padding: 10px;
    border-radius: 5px;
    text-size-adjust: auto;
    color: black;
    font-size: 16px;
    margin: 4px;
    cursor:pointer;
}

.btn-green {
    background-color: #228B22;
    border: 1px;
    padding: 10px;
    border-radius: 5px;
    text-size-adjust: auto;
    color: black;
    font-size: 16px;
    margin: 4px;
    cursor:pointer; 
}