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

body{
    overflow: hidden;
    animation: shakebody linear 6s infinite;
}

/* SKY BACKGROUND */
.sky{
    height: 100vh;
    width: 100%;
    background-image: url(background.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    position: absolute;
}

/* CONTROL BUTTON */
#controlBtn{
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    padding: 12px 22px;
    font-size: 16px;
    background: #ff4d4d;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

/* TREES */
.trees{
    height: 100vh;
    width: 100%;
    background-image: url(trees.png);
    background-size: cover;
    position: absolute;
    top: -144px;
}

/* ROAD / TRACK */
.track{
    height: 60vh;
    width: 800vw;
    background-image: url(track.png);
    background-repeat: repeat-x;
    position: absolute;
    top: 70vh;
    animation: carMove linear 13s infinite;
}

/* CAR BODY */
.car{
    height: 100px;
    width: 380px;
    background-image: url(car_body.png);
    background-size: cover;
    background-repeat: no-repeat;
    position: absolute;
    left: 444px;
    bottom: 30vh;
    animation: shake linear .3s infinite;
}

/* WHEELS */
.wheel1 img{
    width: 77px;
    position: relative;
    top: 42px;
    left: 42px;
    animation: wheelRotation linear .16s infinite;
}

.wheel2 img{
    width: 77px;
    position: relative;
    top: -39px;
    left: 235px;
    animation: wheelRotation linear .16s infinite;
}

/* ANIMATIONS */
@keyframes wheelRotation {
    100% {
        transform: rotate(360deg);
    }
}

@keyframes carMove {
    100% {
        transform: translateX(-500vw);
    }
}

@keyframes shake {
    0% { transform: translateY(-5px); }
    50% { transform: translateY(5px); }
    100% { transform: translateY(-5px); }
}

@keyframes shakebody {
    0% { transform: translateY(-50px); }
    50% { transform: translateY(50px); }
    100% { transform: translateY(-50px); }
}

/* 🔴 IMPORTANT: PAUSE ALL ANIMATIONS */
.paused *{
    animation-play-state: paused !important;
}