/* Plansza */
#game {
    position: absolute;
    width: 69%;
    height: 60%;
    border: 20px solid #fff;
    overflow: hidden;
    background-color: #000;
    opacity: 0.3;
    transition: opacity 0.5s ease, border-top-color 0.1s ease-out, border-bottom-color 0.1s ease-out;
}

#dot-line {
    width: 3px;
    height: 100%;
    border-right: 3px dashed white;
    margin: 0 auto;
}

.paddle {
    position: absolute;
    width: 20px;
    height: 100px;
    background-color: #fff;
    border-radius: 5px;
}

#paddle1 {
    left: 10px;
}

#paddle2 {
    right: 10px;
}

#ball {
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: #fff;
    border-radius: 50%;
    top: calc(50% - 10px);
    left: calc(50% - 10px);
    opacity: 1;
}

#score {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    color: #fff;
    font-size: 20px;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 64px;
}

#score1, #score2 {
    display: block;
    margin-bottom: 10px;
    font-size: 80px;
    width: 50px;
    text-align: center;
}

@keyframes leftGoalHit {
    0% { border-left-color: #fff; }
    50% { border-left-color: red; }
    100% { border-left-color: #fff; }
}

@keyframes rightGoalHit {
    0% { border-right-color: #fff; }
    50% { border-right-color: red; }
    100% { border-right-color: #fff; }
}

.goal-left-active {
    animation: leftGoalHit 1s forwards;
}

.goal-right-active {
    animation: rightGoalHit 1s forwards;
}

#countdown {
    display: block;
    color: white;
    font-size: 500px;
    position: absolute;
    opacity: 0.6;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 21;
}