:root {
    /* Cores principais do tema game */
    --primary-blue: #2563EB;
    --primary-dark: #1D4ED8;
    --success-green: #10B981;
    --warning-yellow: #F59E0B;
    --error-red: #EF4444;
    --accent-purple: #8B5CF6;
    --accent-pink: #EC4899;
    --accent-orange: #F97316;
    
    /* Cores de fundo */
    --dark-bg: #F8FAFC;
    --darker-bg: #F1F5F9;
    --light-bg: #FFFFFF;
    --card-bg: #FFFFFF;
    --card-hover: #F8FAFC;
    
    /* Cores de texto */
    --white: #FFFFFF;
    --text-bright: #1E293B;
    --text-dark: #475569;
    --text-light: #64748B;
    
    /* Cores de borda e sombra */
    --border-color: #E2E8F0;
    --border-glow: #2563EB;
    --shadow: 0 4px 20px rgba(37, 99, 235, 0.1);
    --shadow-glow: 0 8px 32px rgba(37, 99, 235, 0.15);
    --shadow-card: 0 8px 25px rgba(0, 0, 0, 0.08);
    
    /* Efeitos */
    --border-radius: 16px;
    --border-radius-small: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --glow: 0 0 20px rgba(37, 99, 235, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--darker-bg) 0%, var(--light-bg) 100%);
    color: var(--text-bright);
    line-height: 1.6;
    padding-bottom: 80px;
    overflow-x: hidden;
    min-height: 100vh;
}

.app-header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-purple) 100%);
    color: var(--white);
    padding: 1rem;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    box-shadow: var(--shadow-glow);
    border-bottom: 2px solid var(--border-glow);
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.app-logo {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
}

.app-logo:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.header-content h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

.user-info {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    font-weight: 600;
}

.app-main {
    margin-top: 80px;
    padding: 1rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.screen {
    display: none;
    animation: fadeIn 0.3s ease;
}

.screen.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.welcome-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-card);
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.welcome-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.05), transparent);
    transition: left 0.5s;
}

.welcome-card:hover::before {
    left: 100%;
}

.welcome-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.welcome-card h2 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
    text-shadow: 0 0 10px rgba(37, 99, 235, 0.3);
}

.mission-progress {
    margin-top: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--success-green), var(--primary-blue));
    width: 0%;
    transition: var(--transition);
}

.puzzle-categories {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.puzzle-categories h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
}

.category-btn {
    background: var(--card-bg);
    color: var(--text-bright);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.category-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
    border-radius: var(--border-radius);
}

.category-btn:hover {
    transform: translateY(-4px) scale(1.02);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    color: var(--white);
}

.category-btn:hover::before {
    opacity: 1;
}

.category-btn:active {
    transform: translateY(-2px) scale(1.01);
}

.category-btn i {
    font-size: 1.8rem;
    transition: var(--transition);
    filter: drop-shadow(0 0 5px rgba(37, 99, 235, 0.2));
}

.category-btn:hover i {
    transform: scale(1.1);
    filter: drop-shadow(0 0 10px rgba(37, 99, 235, 0.5));
}

.quick-stats {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}

.quick-stats:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.quick-stats h3 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
    font-size: 1.2rem;
    text-shadow: 0 0 10px rgba(37, 99, 235, 0.3);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-purple));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.stat-item:hover::before {
    transform: scaleX(1);
}

.stat-item:hover {
    border-color: var(--border-glow);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.stat-value {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--success-green);
    text-shadow: 0 0 10px rgba(16, 185, 129, 0.3);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-dark);
    font-weight: 500;
}

.puzzle-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.back-btn {
    background: var(--card-bg);
    color: var(--text-bright);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-card);
}

.back-btn:hover {
    background: var(--primary-blue);
    border-color: var(--border-glow);
    color: var(--white);
    box-shadow: var(--shadow-glow);
    transform: scale(1.1);
}

.puzzle-info {
    flex: 1;
}

.puzzle-info h2 {
    color: var(--text-bright);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}

.puzzle-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

.puzzle-content {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.puzzle-question {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.puzzle-options {
    display: grid;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.option-btn {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
    font-size: 1rem;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    color: var(--text-bright);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.option-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.05), transparent);
    transition: left 0.5s;
}

.option-btn:hover::before {
    left: 100%;
}

.option-btn:hover {
    border-color: var(--border-glow);
    background: var(--card-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.option-btn.selected {
    border-color: var(--primary-blue);
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
    color: var(--white);
    font-weight: 600;
    box-shadow: var(--shadow-glow);
    transform: scale(1.02);
}

.option-btn.correct {
    border-color: var(--success-green);
    background: linear-gradient(135deg, var(--success-green), #059669);
    color: var(--white);
    pointer-events: none;
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
    animation: pulse 2s infinite;
}

.option-btn.incorrect {
    border-color: var(--error-red);
    background: linear-gradient(135deg, var(--error-red), #DC2626);
    color: var(--white);
    pointer-events: none;
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
}

.submit-btn {
    background: linear-gradient(135deg, var(--success-green), #059669);
    color: var(--white);
    border: 2px solid var(--success-green);
    border-radius: var(--border-radius);
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
}

.submit-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.submit-btn:hover::before {
    left: 100%;
}

.submit-btn:disabled {
    background: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-light);
    cursor: not-allowed;
    box-shadow: none;
}

.submit-btn:not(:disabled):hover {
    background: linear-gradient(135deg, #059669, var(--success-green));
    border-color: var(--success-green);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.3);
}

.puzzle-result {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.puzzle-result.hidden {
    display: none;
}

.result-content {
    background: var(--card-bg);
    border: 2px solid var(--border-glow);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    max-width: 400px;
    width: 100%;
    animation: slideUp 0.3s ease;
    box-shadow: var(--shadow-glow);
    color: var(--text-bright);
}

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.result-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.result-stats {
    display: flex;
    justify-content: space-between;
    margin: 1rem 0;
    padding: 1rem;
    background: var(--light-bg);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    color: var(--text-light);
}

.next-btn {
    background: var(--primary-blue);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.next-btn:hover {
    background: var(--accent-purple);
}

.ranking-header {
    margin-bottom: 1.5rem;
}

.ranking-header h2 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.ranking-tabs {
    display: flex;
    gap: 1rem;
}

.tab-btn {
    background: var(--light-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.8rem 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

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

.ranking-content {
    display: none;
}

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

.rank-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 1rem;
}

.rank-card h3 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.rank-details {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.rank-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.rank-item:last-child {
    border-bottom: none;
}

.rank-label {
    color: var(--text-light);
    font-size: 0.9rem;
}

.rank-value {
    font-weight: 700;
    color: var(--primary-blue);
}

.leaderboard {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.leaderboard h3 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--light-bg);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.leaderboard-item:hover {
    background: rgba(33, 150, 243, 0.05);
}

.leaderboard-position {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary-blue);
    min-width: 30px;
}

.leaderboard-info {
    flex: 1;
}

.leaderboard-name {
    font-weight: 600;
    color: var(--text-dark);
}

.leaderboard-level {
    font-size: 0.8rem;
    color: var(--text-light);
}

.leaderboard-points {
    font-weight: 700;
    color: var(--success-green);
}

.stats-header {
    margin-bottom: 1.5rem;
}

.stats-header h2 {
    color: var(--text-dark);
    font-size: 1.5rem;
}

.overview-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.overview-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.overview-card i {
    font-size: 2rem;
    color: var(--primary-blue);
}

.card-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.2rem;
}

.card-content p {
    font-size: 0.9rem;
    color: var(--text-light);
}

.category-performance {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}

.category-performance h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.category-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.category-stat {
    background: var(--light-bg);
    border-radius: var(--border-radius);
    padding: 1rem;
    text-align: center;
}

.category-stat h4 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.category-progress {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.category-bar {
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
}

.category-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--success-green), var(--primary-blue));
    transition: var(--transition);
}

.progress-history {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.progress-history h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.progress-chart {
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-bg);
    border-radius: var(--border-radius);
    color: var(--text-light);
}

.achievements-header {
    margin-bottom: 1.5rem;
}

.achievements-header h2 {
    color: var(--text-dark);
    font-size: 1.5rem;
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.achievement-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
}

.achievement-card.unlocked {
    border-color: var(--success-green);
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.05), rgba(33, 150, 243, 0.05));
}

.achievement-card.locked {
    opacity: 0.6;
    filter: grayscale(1);
}

.achievement-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.achievement-title {
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.achievement-description {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.achievement-progress {
    font-size: 0.8rem;
    color: var(--primary-blue);
    font-weight: 600;
}

.medals-section {
    margin-top: 2rem;
}

.medals-section h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.medals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
}

.medal-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1rem;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.medal-card.earned {
    background: linear-gradient(135deg, var(--warning-yellow), var(--success-green));
    color: var(--white);
    transform: scale(1.05);
}

.medal-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.medal-name {
    font-size: 0.9rem;
    font-weight: 600;
}

.faq-header {
    margin-bottom: 1.5rem;
}

.faq-header h2 {
    color: var(--text-dark);
    font-size: 1.5rem;
}

.faq-container {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 1.5rem;
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
}

.faq-question:hover {
    background: var(--light-bg);
}

.faq-question[aria-expanded="true"] {
    background: rgba(33, 150, 243, 0.05);
    color: var(--primary-blue);
}

.faq-icon {
    font-size: 1.2rem;
    font-weight: 700;
    transition: var(--transition);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-light);
    line-height: 1.6;
    animation: slideDown 0.3s ease;
}

.faq-answer[hidden] {
    display: none;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border-top: 2px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    padding: 0.5rem 0;
    z-index: 100;
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(10px);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    padding: 0.5rem;
    color: var(--text-dark);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.7rem;
    min-width: 50px;
    border-radius: var(--border-radius-small);
    position: relative;
}

.nav-item::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-purple));
    transition: width 0.3s ease;
    border-radius: 2px;
}

.nav-item.active {
    color: var(--primary-blue);
}

.nav-item.active::before {
    width: 80%;
}

.nav-item:hover {
    color: var(--primary-blue);
    transform: translateY(-2px);
}

.nav-item:hover::before {
    width: 60%;
}

.nav-item i {
    font-size: 1.2rem;
}

footer {
    background: var(--card-bg);
    color: var(--text-bright);
    padding: 1.5rem 1rem;
    margin-top: 2rem;
    font-size: 0.9rem;
    border-top: 2px solid var(--border-color);
    position: relative;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.footer-logo {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
}

.footer-logo:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.footer-info {
    text-align: center;
}

.footer-info p {
    margin: 0;
    color: var(--text-dark);
    font-weight: 500;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.footer-link {
    color: var(--white);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-small);
    transition: var(--transition);
    background: var(--primary-blue);
    border: 2px solid var(--primary-blue);
    position: relative;
    overflow: hidden;
    font-weight: 600;
    box-shadow: var(--shadow-card);
}

.footer-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.footer-link:hover::before {
    left: 100%;
}

.footer-link:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    color: var(--white);
}

.footer-link i {
    font-size: 1rem;
}

@media (max-width: 768px) {
    .footer-content {
        gap: 1rem;
    }
    
    .footer-brand {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
    
    .footer-logo {
        width: 40px;
        height: 40px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .footer-link {
        width: 100%;
        justify-content: center;
        padding: 1rem 1.5rem;
        font-size: 1rem;
    }
}

/* Mensagens de feedback */
.message {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    color: white;
    font-weight: 600;
    z-index: 1000;
    transform: translateX(100%);
    transition: var(--transition);
    max-width: 300px;
    box-shadow: var(--shadow-glow);
    border: 2px solid transparent;
    backdrop-filter: blur(10px);
}

.message.show {
    transform: translateX(0);
}

.message-success {
    background: linear-gradient(135deg, var(--success-green), #059669);
    border-color: var(--success-green);
}

.message-error {
    background: linear-gradient(135deg, var(--error-red), #DC2626);
    border-color: var(--error-red);
}

.message-info {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
    border-color: var(--primary-blue);
}

.message-level-up {
    background: linear-gradient(135deg, var(--warning-yellow), #D97706);
    border-color: var(--warning-yellow);
    animation: pulse 2s infinite;
}

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

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px rgba(37, 99, 235, 0.3); }
    50% { box-shadow: 0 0 30px rgba(37, 99, 235, 0.5); }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
}

@keyframes sparkle {
    0%, 100% { opacity: 0; transform: scale(0); }
    50% { opacity: 1; transform: scale(1); }
}

/* Efeitos especiais para elementos game */
.game-glow {
    animation: glow 2s ease-in-out infinite;
}

.float-animation {
    animation: float 3s ease-in-out infinite;
}

.sparkle {
    position: relative;
}

.sparkle::after {
    content: '✨';
    position: absolute;
    top: -10px;
    right: -10px;
    font-size: 1.2rem;
    animation: sparkle 2s ease-in-out infinite;
}

/* Badges de dificuldade */
.difficulty-badge {
    padding: 0.4rem 1rem;
    border-radius: 25px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 2px solid transparent;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
    transition: var(--transition);
}

.difficulty-badge:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

.difficulty-1 {
    background: linear-gradient(135deg, var(--success-green), #00CC6A);
    color: white;
    border-color: #00CC6A;
}

.difficulty-2 {
    background: linear-gradient(135deg, var(--warning-yellow), #FFB800);
    color: white;
    border-color: #FFB800;
}

.difficulty-3 {
    background: linear-gradient(135deg, var(--accent-orange), #FF7A00);
    color: white;
    border-color: #FF7A00;
}

.difficulty-4 {
    background: linear-gradient(135deg, var(--accent-purple), #9333EA);
    color: white;
    border-color: #9333EA;
}

.difficulty-5 {
    background: linear-gradient(135deg, var(--error-red), #DC2626);
    color: white;
    border-color: #DC2626;
}

/* Melhorias de acessibilidade */
.option-btn:focus,
.category-btn:focus,
.nav-item:focus {
    outline: 2px solid var(--primary-blue); /* Changed from --primary-color to --primary-blue */
    outline-offset: 2px;
}

.option-btn[aria-pressed="true"] {
    background: var(--primary-blue); /* Changed from --primary-color to --primary-blue */
    color: white;
    transform: scale(1.02);
}

/* Estados de loading */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-blue); /* Changed from --primary-color to --primary-blue */
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Melhorias para dispositivos móveis */
@media (max-width: 768px) {
    .app-main {
        padding: 0.8rem;
    }
    
    .logo-container {
        gap: 0.5rem;
    }
    
    .app-logo {
        width: 32px;
        height: 32px;
    }
    
    .header-content h1 {
        font-size: 1.3rem;
    }
    
    .user-info {
        font-size: 0.8rem;
        gap: 0.5rem;
    }
    
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
    }
    
    .stat-item {
        padding: 0.8rem 0.5rem;
    }
    
    .stat-value {
        font-size: 1.2rem;
    }
    
    .overview-cards {
        grid-template-columns: 1fr;
    }
    
    .category-stats-grid {
        grid-template-columns: 1fr;
    }
    
    .achievements-grid {
        grid-template-columns: 1fr;
    }
    
    .medals-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .ranking-tabs {
        flex-direction: column;
    }
    
    .nav-item {
        font-size: 0.6rem;
        padding: 0.3rem;
    }
    
    .nav-item i {
        font-size: 1rem;
    }

    .message {
        top: 10px;
        right: 10px;
        left: 10px;
        max-width: none;
        transform: translateY(-100%);
    }
    
    .message.show {
        transform: translateY(0);
    }
    
    .difficulty-badge {
        font-size: 0.7rem;
        padding: 0.2rem 0.6rem;
    }
}

@media (max-width: 480px) {
    .puzzle-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .mission-progress {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .result-content {
        margin: 1rem;
        padding: 1.5rem;
    }
    
    .rank-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.3rem;
    }
    
    .overview-card {
        flex-direction: column;
        text-align: center;
    }

    .message {
        font-size: 0.9rem;
        padding: 0.8rem 1rem;
    }
}