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

#backgroundImage {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('img/background_img.webp');
    background-size: cover;
    background-position: center;
    z-index: -1;
}

.screen {
    background-color: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 80%;
    max-width: 800px;
    position: absolute;
    display: none;
}

.screen.active {
    display: block;
}

#typingSection {
    margin-top: 20px;
}

#status {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

#typingInput {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

#result {
    margin-top: 10px;
    font-size: 18px;
}

.highlight {
    background-color: yellow;
}

#keyboardLayout {
    margin-top: 20px;
}

.key {
    display: inline-block;
    width: 40px;
    height: 40px;
    margin: 5px;
    line-height: 40px;
    text-align: center;
    border: 1px solid #ccc;
    border-radius: 5px;
}

.key.highlight {
    background-color: orange;
}

#fireworks {
    width: 100%;
    height: 200px;
    background: url('fireworks.gif') center center no-repeat;
    background-size: contain;
}

#timer {
    font-size: 24px;
}

#currentText {
    font-size: 32px;
    color: blue;
}

#furiganaText {
    font-size: 24px;
    color: black;
}

#romajiText {
    font-size: 24px;
    font-weight: bold;
    color: black;
    font-family: 'Courier New', Courier, monospace; /* 等幅フォント */
}

#endScreen #stats #rank {
    font-size: 2em;
    font-weight: bold;
}

#difficultySelection {
    margin-bottom: 20px;
}

.difficulty-btn {
    background-color: gray;
    color: white;
    padding: 10px 20px;
    margin: 5px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.difficulty-btn.active {
    background-color: gray;
}

#beginner-words.active {
    background-color: orange;
}

#intermediate-sentences.active {
    background-color: blue;
}

#beginner-minecraft.active {
    background-color: green;
}

#advanced-minecraft-command.active {
    background-color: purple;
}