* {
    margin: 0;
    padding: 0;
    border: 0;
}
@font-face {
    font-family: AlphaWood;
    src: url('AlphaWood.ttf');
}
body {
    background-color: #000;
}
.panel {
    width: 500px;
    height: 500px;
    border-radius: 400px;
}
.modal {
    position: absolute;
    transition: all .5s;
}
#startScreen {
    height: 300px;
    width: 300px;
    background: url('../IMG/start.png') no-repeat;
    left: 100px;
    top: 100px;
    border-radius: 0;
    opacity: 1;
    z-index: 1;
}
#overScreen {
    height: 300px;
    width: 300px;
    background: url('../IMG/win.png') no-repeat;
    left: 100px;
    top: 100px;
    border-radius: 0;
    opacity: 0;
    z-index: -1;
}
#container {
    position: relative;
    margin: 50px auto;
    background-color: #000;
    border: outset #0f0;
    box-shadow: 2px 2px 50px rgba(0,255,0,0.5);
}
.tile {
    width: 90px;
    height: 90px;
    position: absolute;
    /* para manipular depois as peças com js no container é importante que está posição seja absolute */
    background-color: silver;
    border-radius: 10px;
    transition: left .5s,top .5s;
}
/* hover configuração para quando passar o mouse no elemento */
.tile:hover {
    border: inset;
    border-radius: 10px;
}
h1 {
    font: 50px AlphaWood;
    color: #ffffff;
    position: absolute;
    text-shadow: 2px 2px 100px rgba(0,255,0,0.7);
}