#fps-game {
    width: 100%;
    height: 500px;
    position: relative;
    overflow: hidden;
    background: #2e2e2e;
    font-family: Arial, sans-serif;
}

/* Start & End Screens */
#start-screen, #end-screen {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    flex-direction: column;
}

button {
    background: blue;
    color: white;
    padding: 15px 30px;
    border: none;
    font-size: 18px;
    cursor: pointer;
}

/* Game Screen */
#game-screen {
    width: 100%;
    height: 100%;
    position: relative;
}

/* 3D Room illusion */
#room {
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, #d3d3d3 0%, #444 50%, #007BFF 100%);
    position: relative;
}

/* Top text */
#top-text {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: yellow;
    color: black;
    font-weight: bold;
    padding: 5px 15px;
}

/* Target */
#target {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: red;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: none;
}

/* Crosshair */
#crosshair {
    position: absolute;
    font-size: 24px;
    color: white;
    pointer-events: none;
}