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

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: black;
}

#game-area {
    border: 5px solid lightgreen;
    margin-top: 8px;
}

.hidden {
    display: none !important;
    visibility: hidden;
}

#current-score,
#highest-score {
    color: white;
    font-size: 24px;
    padding: 10px;
    margin-top: 16px;
}

#button-area {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    margin: 32px;
}

.game-button {
    padding: 0.25rem 0.5rem;
    border-radius: 5px;
    font-size: 1.15rem;
    cursor: pointer;
    background-color: yellow;
}

#toggle-pause {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 32px;
    height: 32px;
}

#toggle-pause>svg {
    transform: scale(2);
}

#start {
    animation: grow-shrink 2s linear infinite;
}

.game-button:focus {
    outline: none;
}

@keyframes grow-shrink {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.2);
    }

    100% {
        transform: scale(1);
    }
}

.setting-button {
    transform: scale(1.5);
    position: absolute;
    top: 24px;
    right: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 16px;
    height: 16px;
    background-color: black;
    color: white;
    cursor: pointer;
    border-radius: 50%;
}

.page-cover {
    z-index: 1 !important;
    position: fixed !important;
    display: block !important;
}

@keyframes fade-in {
    0% {
        opacity: 0;
    }

    100% {
        opacity: 1;
    }
}

@keyframes fade-out {
    0% {
        opacity: 1;
    }

    100% {
        opacity: 0;
    }
}

#setting-page {
    display: none;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: -1;
    padding: 32px;
}

#setting-menu {
    padding: 32px;
    background-color: rgba(240, 240, 240, 0.9);
    width: 100%;
    height: 100%;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

#setting-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.setting-item {
    background-color: rgba(240, 240, 240, 0.7);
    border: 1px solid #666;
    border-radius: 10px;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.setting-item-checkbox {
    align-items: center;
    justify-content: space-between;
    flex-direction: row;
}

label {
    font-size: 16px;
    color: #333;
}

input {
    cursor: pointer;
}

select {
    border-radius: 5px;
    height: 24px;
}

input[type="checkbox"] {
    border: 1px solid #666;
    border-radius: 5px;
    width: 16px;
    height: 16px;
}

.form-button {
    padding: 0.25rem 0.5rem;
    border-radius: 5px;
}

#reset-setting {
    background-color: rgb(255, 80, 0);
}

#reset-highest-score {
    position: absolute;
    bottom: 72px;
    background-color: rgb(255, 80, 0);
}