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

button, input[type=submit], input[type=button] {
    font-size: 1.4em; font-weight: bold;
    margin: 8px; padding: 12px;
    background-color: seashell; color: seagreen;
    border: 4px solid greenyellow;
}

button:hover, input[type=submit]:hover, input[type=button]:hover {
    background-color: salmon; color: slateblue;
    cursor: pointer;
}