body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f0f0f0;
    margin: 0;
    overflow: hidden;
}

#startButton {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 15px 30px;
    font-size: 20px;
    font-weight: bold;
    color: white;
    background: linear-gradient(45deg, #ff416c, #ff4b2b);
    border: none;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    user-select: none;
    z-index: 99;
}
#startButton:hover {
    background: linear-gradient(45deg, #ff4b2b, #ff416c);
    transform: translate(-50%, -50%) scale(1.05);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}
#startButton:active {
    transform: translate(-50%, -50%) scale(0.95);
}

.game-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
}

.object {
    position: absolute;
    font-size: 40px;
    font-weight: bold;
    user-select: none;
}
.rock { color: gray; }
.paper { color: lightblue; }
.scissors { color: red; }