:root {
    --primary-color: #f4f4f9;
    --secondary-color: #e0e0eb;
    --background-color: #fff;
    --text-color: #333;
    --card-bg-color: #fff;
    --accent-color: #6c63ff;
    --box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    --review-correct-bg: #d4edda;
    --review-incorrect-bg: #f8d7da;
}

body.dark-mode {
    --primary-color: #2c2c34;
    --secondary-color: #3e3e4d;
    --background-color: #1e1e24;
    --text-color: #f4f4f9;
    --card-bg-color: #3e3e4d;
    --accent-color: #9d96ff;
    --box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    --review-correct-bg: #1e4d29;
    --review-incorrect-bg: #741d21;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    margin-bottom: 30px;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1, h2, h3 {
    color: var(--accent-color);
}

.subject-card, .mode-button {
    background-color: var(--card-bg-color);
    border-radius: 10px;
    padding: 20px;
    box-shadow: var(--box-shadow);
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
    color: var(--text-color);
}

.subject-card:hover, .mode-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.subject-card i {
    font-size: 3em;
    color: var(--accent-color);
}

.card-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.mode-buttons-container {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.mode-button {
    flex: 1;
    max-width: 200px;
    font-size: 1.2em;
    padding: 15px;
}

#quiz-container {
    background-color: var(--card-bg-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

#answers-container button {
    display: block;
    width: 100%;
    text-align: left;
    padding: 15px;
    margin-bottom: 10px;
    border: 1px solid var(--secondary-color);
    background-color: var(--primary-color);
    color: var(--text-color);
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
}

#answers-container button:hover {
    background-color: var(--secondary-color);
}

#answers-container button.correct {
    background-color: #4caf50;
    color: white;
    border-color: #4caf50;
}

#answers-container button.incorrect {
    background-color: #f44336;
    color: white;
    border-color: #f44336;
}

#next-button, #restart-button, #review-button, #export-csv-button, #toggle-history-button, #toggle-chart-button, #toggle-quiz-chart-button, #back-to-home-from-review, #back-to-home-from-history {
    background-color: var(--accent-color);
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    margin-top: 10px;
    transition: background-color 0.2s;
}

#next-button:hover, #restart-button:hover, #review-button:hover, #export-csv-button:hover, #toggle-history-button:hover, #toggle-chart-button:hover, #toggle-quiz-chart-button:hover, #back-to-home-from-review:hover, #back-to-home-from-history:hover {
    background-color: #5a53d1;
}

#explanation-text {
    margin-top: 20px;
    padding: 15px;
    background-color: var(--secondary-color);
    border-radius: 8px;
}

.hidden {
    display: none;
}

#timer-bar {
    width: 100%;
    height: 10px;
    background-color: #ddd;
    border-radius: 5px;
    margin-bottom: 20px;
    overflow: hidden;
}

#timer-fill {
    height: 100%;
    width: 100%;
    background-color: var(--accent-color);
    transition: width 1s linear;
}

#aside-container {
    background-color: var(--card-bg-color);
    padding: 20px;
    margin-top: 20px;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

.full-width {
    width: 100%;
}

#result-container h3, #history-container h3, #review-container h3 {
    margin-top: 0;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

#toggle-history-button, #toggle-chart-button, #toggle-quiz-chart-button, #review-button {
    flex-grow: 1;
}

#final-score {
    font-size: 1.5em;
    font-weight: bold;
    margin-bottom: 20px;
}

#history-container ul {
    list-style: none;
    padding: 0;
}

#history-container li {
    padding: 8px 0;
    border-bottom: 1px solid var(--secondary-color);
}

#dark-mode-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    transition: color 0.3s;
}

#dark-mode-toggle:hover {
    color: var(--accent-color);
}

/* Regra para ajustar o tamanho dos gráficos */
#quiz-result-chart, #scoreChart {
    max-width: 400px;
    width: 100%;
    height: auto;
    margin: 20px auto 0 auto;
    display: block;
}

/* Estilo para a revisão do quiz */
.review-item {
    margin-bottom: 15px;
    padding: 10px;
    border-radius: 8px;
}

.review-item h4 {
    margin: 0 0 5px 0;
}