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

:root {
    /* Dark theme (default) */
    --bg-color: #1e1e1e;
    --fg-color: #dcdcdc;
    --accent-color: #3c3f41;
    --green-text: #64ff64;
    --red-text: #ff6464;
    --grey-text: #787878;
    --cursor-color: rgba(255, 255, 0, 0.3);
    --stat-text-color: #57c7ff;
    --border-color: #808080;
}

body.light-mode {
    /* Light theme - Redesigned for optimal readability and contrast */
    --bg-color: #fafafa;
    --fg-color: #1a1a1a;
    --accent-color: #ffffff;
    --green-text: #00aa00;
    --red-text: #d32f2f;
    --grey-text: #6e6e6e;
    --cursor-color: rgba(33, 150, 243, 0.25);
    --stat-text-color: #1976d2;
    --border-color: #e0e0e0;
    --shadow: rgba(0, 0, 0, 0.05);
    /* Explicitly set background and text colors */
    background-color: #fafafa !important;
    color: #1a1a1a !important;
}

body {
    font-family: 'Courier New', 'Monaco', monospace;
    background-color: var(--bg-color);
    color: var(--fg-color);
    padding: 20px;
    min-height: 100vh;
    transition: background-color 0.3s, color 0.3s;
}

/* Ensure all text elements inherit the correct color in light mode */
body.light-mode * {
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px 30px;
}

.top-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 20px;
}

.config-panel {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.config-panel label {
    color: var(--fg-color);
    font-weight: bold;
}

.difficulty-select {
    padding: 8px 12px;
    background-color: var(--accent-color);
    color: var(--fg-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 14px;
    cursor: pointer;
}

.difficulty-select:focus {
    outline: 2px solid var(--stat-text-color);
    outline-offset: 2px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    user-select: none;
    color: var(--fg-color);
}

.checkbox-label span {
    color: var(--fg-color);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.stats-bar {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    min-width: 500px;
}

.stat-label {
    padding: 15px;
    background-color: var(--accent-color);
    color: var(--stat-text-color);
    text-align: center;
    font-weight: bold;
    font-size: 20px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-shadow: 0 1px 3px var(--shadow, transparent);
}

.center-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.text-display {
    min-height: 250px;
    padding: 20px;
    background-color: var(--accent-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 26px;
    font-weight: bold;
    line-height: 1.6;
    overflow-wrap: break-word;
    white-space: pre-wrap;
    font-family: 'Courier New', 'Monaco', monospace;
    box-shadow: 0 2px 4px var(--shadow, transparent);
}

.input-area {
    min-height: 250px;
    padding: 20px;
    background-color: var(--accent-color);
    color: var(--fg-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 26px;
    font-family: 'Courier New', 'Monaco', monospace;
    line-height: 1.6;
    resize: vertical;
    width: 100%;
    box-shadow: 0 2px 4px var(--shadow, transparent);
}

.input-area:focus {
    outline: 2px solid var(--stat-text-color);
    outline-offset: 2px;
}

.input-area::placeholder {
    color: var(--grey-text);
    opacity: 0.5;
}

/* Character styling classes */
.char-correct {
    color: var(--green-text);
}

.char-wrong {
    color: var(--red-text);
    text-decoration: underline;
}

.char-untyped {
    color: var(--grey-text);
}

.char-cursor {
    background-color: var(--cursor-color);
}

/* Responsive design */
@media (max-width: 768px) {
    .stats-bar {
        min-width: 100%;
        grid-template-columns: 1fr;
    }
    
    .text-display,
    .input-area {
        font-size: 18px;
    }
    
    .top-panel {
        flex-direction: column;
        align-items: stretch;
    }
}