html, body { height: 100%; margin: 0; }
body {
    background: radial-gradient(#666, #222);
}

canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* para que no interfiera con clicks */
    pointer-events: none;
}

.button {
    position: absolute;
    left:50%; top:50%;
    width:140px; height:140px;
    margin:-70px 0 0 -70px;
    cursor: pointer;
}
.compass {
    position: absolute;
    width:100%; height:100%;
    background: #444;
    border-radius: 0 50% 50% 50%;
    border: 10px solid white;
    box-shadow: 0 0 8px rgba(0,0,0,.2);
    border-right-color: coral;
    border-bottom-color: coral;
    transition: border-radius .2s;
    box-sizing: border-box;
}
.button:hover .compass {
    border-radius: 50%;
}
.msg {
    position: absolute;
    width:100%; height:100%;
    line-height: 140px;
    text-align: center;
    color: #fff;
    font-family: 'Roboto', sans-serif;
    font-size: 20px;
    font-weight: 300;
}
.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(139, 134, 134, 0.5);
    transform: scale(0);
    pointer-events: none;
    width: 20px;
    height: 20px;
    animation: rippleEffect 0.6s ease-out forwards;
}

@keyframes rippleEffect {
    to {
        transform: scale(10);
        opacity: 0;
    }
}

.logo_summer_loading{
  position: absolute;
  width: 8%;
  bottom: 5%;
  right: 3%;
  margin: auto;
}