style.css

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

.header {
    border: 2px black solid;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 10px;
}

.score-board {
    border: 2px black solid;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 10px;
}

.score-board-info {
    border: 2px black solid;
    margin: 10px;
    text-align: center;
}

.score-container {
    display: flex;
    border: 2px black solid;
    margin: 10px;
    gap: 30px;
}

.choice-container {
    display: flex;
    justify-content: center;
    align-items: center;
    border: 2px black solid;
    margin: 10px;
    gap: 30px;
}

.player-choice-element,
.computer-choice-element {
    text-align: center;
}

.button-container {
    border: 2px black solid;
    margin: 10px;
    text-align: center;
}

.choice-button {
    margin: 10px;
    padding: 10px;
}

.footer {
    display: flex;
    justify-content: center;
    align-items: center;
    border: 2px black solid;
    margin: 10px;
    gap: 20px;
}

.overlay {
    position: fixed;
    display: none;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5);
    cursor: pointer;
}

.overlay.active {
    display: block;
}

.modal {
    position: fixed;
    z-index: 1;
    left: 50%;
    top: 50%;
    width: 25%;
    height: 25%;
    background-color: rgb(0,0,0);
    transform: translate(-50%, -50%) scale(0);
    transition: 100ms ease-in-out;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .modal.active {
    transform: translate(-50%, -50%) scale(1);
  }

  .modal-content {
    display: flex;
    flex-direction: column;
  }

  .modal-text {
    color: white;
    font-size: 24px;
    padding: 12px;
  }

  .modal-button {
    padding: 8px;
  }