html {
    touch-action: manipulation;
    user-select: none;
}
body {
    color: white;
    background-color: #333333;
    font-family: sans-serif;
}
.car {
    width: 2cm;
    height: 1.5cm;
    user-select: none;
    background-color: #0000ff33;
    display: flex;
    align-items: center;
    justify-content: center;
}
.control {
    min-width: 1cm;
    min-height: 1cm;
    color: yellow;
    font-size: large;
    padding: 0;
    background-color: transparent;
    border: none;
    text-shadow: 0 0 0.5ex black;
    outline: 0 solid red;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: center;
}
#gas {
    position: fixed;
    right: 0;
    top: 0;
    width: 18vw;
    bottom: 0;
}
#brake {
    position: fixed;
    left: 0;
    top: 0;
    width: 18vw;
    bottom: 0;
}
#menu {
    position: fixed;
    width: 3cm;
    left: calc(50vw - 1.5cm);
    bottom: 0;
}
#menu .hide {
    display: none;
}
nav.top.hide {
    display: none;
}
nav.top {
    position: fixed;
    top: 0;
    left: 2cm;
    right: 2cm;
    outline: 0 solid lime;
    display: flex;
    padding: 0.5ex;
    color: yellow;
    align-items: center;
    justify-content: center;
}
nav.top div {
    flex: 1;
    text-align: center;
}

#intro {
    pointer-events: none;
    position: fixed;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    z-index: 99;
}
#intro.hide {
    display: none;
}
#ambient {
    position: fixed;
    left: 0;
    top: 0;
    display: none;
}

#lip {
    position: fixed;
    top: 0;
    left: 18vw;
    right: 18vw;
    border: 0 solid red;
    color: yellow;
    text-align: center;
    font-weight: bold;
    z-index: 10;
    text-shadow: 0 0 2px black;
    pointer-events: none;
}
#lip.error {
    color: red;
}
#lip_message {
    pointer-events: auto;
    background-color: #333333aa;
    display: inline-block;
    padding: 1ex;
    border-bottom-right-radius: 1ex;
    border-bottom-left-radius: 1ex;
}
#lip.hide {
    display: none;
}

/* tooltip to show next level */

.tooltip {
    position: relative;
    display: none;
    transition: opacity 0.3s linear;
    opacity: 0;
}

.tooltip span {
    left: -3em;
    top: 2em;
    transition: top 0.2s;
    position: absolute;
    background: #000000;
    background: #000000cc;
    background: rgba(0,0,0,0.8);
    color: white;
    border-radius: 1ex;
    padding: 1ex;
    white-space: nowrap;
}

.tooltip span:after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 2em;
    margin-left: -8px;
    width: 0;
    height: 0;
    border-bottom: 8px solid #000000;
    border-right: 8px solid transparent;
    border-left: 8px solid transparent;

}