:root {
    --background-color: #1b1b1b;
    --text-color: #ffffff;
    --button-background: #1f1f1f;
    --button-text-color: #ffffff;
}

body.light-mode {
    --background-color: #ffffff;
    --text-color: #121212;
    --button-background: #f0f0f0;
    --button-text-color: #121212;
}

body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    text-align: center;
}

header {
    margin-bottom: 20px;
}

#toggle-theme {
    background-color: var(--button-background);
    color: var(--button-text-color);
    border: none;
    padding: 10px 20px;
    cursor: pointer;
}

#word-container {
    margin-bottom: 20px;
    font-size: 24px;
}

#typing-area {
    width: 100%;
    height: 100px;
    padding: 10px;
    font-size: 18px;
    border: 1px solid var(--text-color);
}

#result {
    margin-top: 20px;
    font-size: 20px;
}

#log-container {
    margin-top: 20px;
}

#log-list {
    list-style: none;
    padding: 0;
}

#log-list li {
    margin-bottom: 10px;
}