body {
    margin: 0;
    overflow: hidden;
    background-color: #87CEEB; /* Sky Blue */
}

.game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background-color: #2E8B57; /* Ground color */
}

#player {
    position: absolute;
    bottom: 5vh;
    left: 10vw;
    width: 10vw;
    height: 10vw;
    max-width: 50px;
    max-height: 50px;
    background-color: #FFD700;
    transition: bottom 0.2s ease;
}

#obstacle {
    position: absolute;
    bottom: 5vh;
    right: -60px;
    width: 12vw;
    height: 12vw;
    max-width: 60px;
    max-height: 60px;
    background-color: #FF4500;
}

#ground {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 5vh;
    background-color: #228B22;
}

#score {
    position: absolute;
    top: 10px;
    left: 10px;
    font-size: 1.5rem;
    color: white;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 5px;
    border-radius: 5px;
}

#fullscreenBtn {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 1rem;
    padding: 10px;
    background-color: #000;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    z-index: 1000;
}

#gameOverMessage {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    max-width: 300px;
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 20px;
    border-radius: 10px;
    display: none;
    text-align: center;
}

#instructions {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 1000;
}

#jumpBtn {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 15px 30px;
    font-size: 1rem;
    background-color: #ff4500;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    z-index: 1000;
}