:root {
    --primary-color: #4CAF50;
    --secondary-color: #45a049;
    --background-color: #f4f4f4;
    --text-color: #333;
    --card-background: #fff;
    --card-border: #e0e0e0;
    --key-background: #e0e0e0;
    --key-text: #333;
    --accent-color: #FF5722;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

h1 {
    text-align: center;
    color: var(--primary-color);
    font-size: 2.5em;
    margin-bottom: 30px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

.card {
    background-color: var(--card-background);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 20px;
    margin-bottom: 20px;
    width: 100%;
    box-sizing: border-box;
}

.card-title {
    font-size: 1.5em;
    color: var(--primary-color);
    margin-bottom: 15px;
}

#text-display {
    font-size: 1.2em;
    margin-bottom: 15px;
    line-height: 1.4;
    background-color: var(--background-color);
    color: var(--text-color);
    padding: 15px;
    border-radius: 5px;
    border-left: 5px solid var(--primary-color);
}

#user-input {
    width: 100%;
    /* padding: 10px; */
    font-size: 1.5em;
    margin: 0 auto 15px;
    border: 2px solid var(--primary-color);
    border-radius: 5px;
    transition: border-color 0.3s;
    background-color: var(--card-background);
    color: var(--text-color);
    display: block;
}

#user-input:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 5px rgba(76, 175, 80, 0.5);
}

.correct {
    color: #4CAF50;
}

.incorrect {
    color: #f44336;
    text-decoration: underline;
}

button {
    background-color: var(--primary-color);
    border: none;
    color: white;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s, transform 0.1s;
}

button:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

button:active {
    transform: translateY(0);
}

button:disabled {
    background-color: #cccccc;
}

select {
    padding: 10px;
    font-size: 16px;
    margin-bottom: 15px;
    border-radius: 5px;
    border: 1px solid var(--card-border);
    background-color: var(--card-background);
    color: var(--text-color);
}

.stats {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    font-weight: bold;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    border: 1px solid var(--card-border);
    padding: 10px;
    text-align: left;
}

th {
    background-color: var(--primary-color);
    color: white;
}

.dark-mode {
    --background-color: #333;
    --text-color: #fff;
    --card-background: #444;
    --card-border: #555;
    --key-background: #555;
    --key-text: #fff;
}

#keyboard {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 5px;
    margin-top: 20px;
}

.key {
    background-color: var(--key-background);
    color: var(--key-text);
    border: 1px solid #999;
    border-radius: 4px;
    padding: 5px;
    text-align: center;
    font-size: 14px;
    transition: all 0.3s;
}

.key.active {
    background-color: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

#progress-chart {
    width: 100%;
    height: 300px;
}

#theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-color);
}

.timer-bar {
    width: 100%;
    height: 10px;
    background-color: #e0e0e0;
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 15px;
}

.timer-progress {
    height: 100%;
    background-color: var(--primary-color);
    transition: width 1s linear;
}

#confetti-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
}

.tab-container {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.tab {
    padding: 10px 20px;
    background-color: #ddd;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s;
    border-radius: 5px 5px 0 0;
}

.tab:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.tab.active {
    background-color: var(--primary-color);
    color: white;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.achievement {
    background-color: #ffd700;
    color: #333;
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 0.9em;
    margin-right: 5px;
    display: inline-block;
    margin-bottom: 5px;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.pulse {
    animation: pulse 2s infinite;
}

#congrats {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    z-index: 1000;
    font-size: 24px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
    animation: congratsAnimation 5s ease-in-out;
}

@keyframes congratsAnimation {
    0% { background-color: rgba(255, 255, 255, 0.9); color: var(--primary-color); }
    25% { background-color: rgba(255, 223, 0, 0.9); color: #333; }
    50% { background-color: rgba(255, 105, 180, 0.9); color: white; }
    75% { background-color: rgba(0, 191, 255, 0.9); color: white; }
    100% { background-color: rgba(255, 255, 255, 0.9); color: var(--primary-color); }
}

.dark-mode #congrats {
    background-color: rgba(68, 68, 68, 0.9);
    color: #fff;
}

#level-up {
    display: none;
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--accent-color);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    font-size: 18px;
    font-weight: bold;
    z-index: 1000;
    animation: levelUpAnimation 2s ease-in-out;
}

@keyframes levelUpAnimation {
    0% { transform: translateX(-50%) translateY(-50px); opacity: 0; }
    20% { transform: translateX(-50%) translateY(0); opacity: 1; }
    80% { transform: translateX(-50%) translateY(0); opacity: 1; }
    100% { transform: translateX(-50%) translateY(-50px); opacity: 0; }
}