* {
    margin: 0;
    padding: 0;
}

html,
body {
    width: 100%;
    height: 100%;
    touch-action: none;
}

body {
    display: flex;
    background-image: linear-gradient(25deg, #24305a, #3e6270, #519885, #5fd29a);
}

#wave {
    margin: auto;
    width: 60vmin;
    height: 60vmin;
}

.tools-bar {
    position: fixed;
    top: 0;
    left: 0;
    padding: 15px;
}

.checkbox {
    display: block;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    color: #d5f6ec;
    margin-bottom: 1em;
}