:root {
    --primary-blue: #2196F3;
    --primary-green: #4CAF50;
    --primary-amber: #FFC107;
    --primary-red: #F44336;
    --primary-purple: #9C27B0;
    --bg-dark: #121212;
    --bg-card: #1e1e1e;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1a1a2e 50%, #16213e 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding-bottom: 80px;
    overflow-x: hidden;
}

/* Header Styles */
header {
    background: rgba(33, 150, 243, 0.1);
    backdrop-filter: blur(10px);
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

header h1 {
    font-size: 1.5rem;
    background: linear-gradient(45deg, var(--primary-blue), var(--primary-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.lang-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Main Content */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.section {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.section.active {
    display: block;
}

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

/* Home Section */
.welcome-container {
    text-align: center;
    padding: 2rem 0;
}

.welcome-container h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(45deg, var(--primary-blue), var(--primary-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-container p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.mode-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.mode-btn {
    background: linear-gradient(135deg, var(--bg-card), rgba(33, 150, 243, 0.1));
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    padding: 2rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.mode-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

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

.mode-btn:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: var(--primary-blue);
}

.mode-btn.selected {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.mode-btn i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.difficulty-selection {
    margin: 2rem 0;
}

.difficulty-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.difficulty-btn {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 120px;
}

.difficulty-btn:hover {
    transform: translateY(-3px);
    border-color: var(--primary-green);
}

.difficulty-btn.selected {
    background: var(--primary-green);
    transform: translateY(-3px);
}

.difficulty-btn small {
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.start-btn {
    background: linear-gradient(45deg, var(--primary-green), var(--primary-blue));
    border: none;
    color: white;
    padding: 1rem 3rem;
    border-radius: var(--border-radius);
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 2rem;
    position: relative;
    overflow: hidden;
}

.start-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
}

.start-btn:hover::before {
    width: 300px;
    height: 300px;
}

.start-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(76, 175, 80, 0.3);
}

/* Game Section */
.game-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-card);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.game-info {
    display: flex;
    gap: 2rem;
    font-weight: bold;
}

.pause-btn {
    background: var(--primary-amber);
    border: none;
    color: white;
    padding: 0.5rem;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    transition: var(--transition);
}

.pause-btn:hover {
    background: #FF9800;
    transform: scale(1.1);
}

.sequence-display {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    gap: 1rem;
}

.sequence-container {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.05);
    margin: 1rem 0;
}

.sequence-item {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    position: relative;
    overflow: visible;
    margin: 0.5rem;
}

.sequence-item.highlight {
    animation: pulse 0.6s ease-in-out;
    transform: scale(1.2);
    box-shadow: 0 0 20px currentColor;
}

@keyframes pulse {
    0%, 100% { transform: scale(1.2); }
    50% { transform: scale(1.3); }
}

.sequence-item.number {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    color: white;
    font-weight: bold;
}

.sequence-item.color {
    border: 2px solid rgba(255, 255, 255, 0.3);
    position: relative;
}

.sequence-item.color::after {
    content: attr(title);
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    background: rgba(0, 0, 0, 0.8);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-weight: 500;
}

.sequence-item.shape {
    background: var(--bg-card);
    border: 2px solid var(--primary-green);
    color: var(--primary-green);
    font-size: 1.8rem;
}

.sequence-item.shape::after {
    content: attr(title);
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    background: rgba(0, 0, 0, 0.8);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-weight: 500;
}

.sequence-item.sound {
    background: linear-gradient(135deg, var(--primary-amber), var(--primary-red));
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
}

.sequence-item.sound::after {
    content: attr(title);
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    background: rgba(0, 0, 0, 0.8);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-weight: 500;
}

.input-area {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.input-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-height: 80px;
    margin-bottom: 2rem;
}

.user-sequence-display {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    min-height: 100px;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    border: 2px dashed rgba(255, 255, 255, 0.2);
    margin: 1rem 0;
}

.input-buttons {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    padding: 1.5rem;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin: 1rem 0;
}

.input-item {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    background: rgba(255, 255, 255, 0.1);
}

.input-item:hover {
    transform: scale(1.1);
    background: rgba(255, 255, 255, 0.2);
}

/* Estilos específicos para botões de entrada por tipo */
.input-item.number {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    color: white;
    font-weight: bold;
}

.input-item.color {
    border: 2px solid rgba(255, 255, 255, 0.3);
    position: relative;
}

.input-item.color::after {
    content: attr(title);
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    background: rgba(0, 0, 0, 0.8);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-weight: 500;
}

.input-item.shape {
    background: var(--bg-card);
    border: 2px solid var(--primary-green);
    color: var(--primary-green);
    font-size: 1.8rem;
}

.input-item.shape::after {
    content: attr(title);
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    background: rgba(0, 0, 0, 0.8);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-weight: 500;
}

.input-item.sound {
    background: linear-gradient(135deg, var(--primary-amber), var(--primary-red));
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
}

.input-item.sound::after {
    content: attr(title);
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    background: rgba(0, 0, 0, 0.8);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-weight: 500;
}

.user-item {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: bold;
    background: var(--primary-green);
    color: white;
    border: 2px solid var(--primary-green);
    animation: fadeIn 0.3s ease-in-out;
    margin: 0.5rem;
    box-shadow: 0 4px 8px rgba(76, 175, 80, 0.3);
}

.sequence-hidden-message {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-style: italic;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    border: 2px dashed rgba(255, 255, 255, 0.2);
    animation: fadeIn 0.5s ease-in-out;
}

.correct-sequence-message {
    text-align: center;
    font-size: 1.2rem;
    color: var(--primary-red);
    font-weight: bold;
    margin-bottom: 1rem;
    animation: fadeIn 0.5s ease-in-out;
}

.correct-sequence-display {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    background: rgba(244, 67, 54, 0.1);
    border-radius: var(--border-radius);
    border: 2px solid var(--primary-red);
    animation: fadeIn 0.5s ease-in-out;
}

.correct-item {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    background: var(--primary-red);
    color: white;
    border: 2px solid var(--primary-red);
    animation: pulse 0.6s ease-in-out;
}

.game-controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.submit-btn, .clear-btn {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
}

.submit-btn {
    background: var(--primary-green);
    color: white;
}

.submit-btn:disabled {
    background: rgba(76, 175, 80, 0.3);
    cursor: not-allowed;
}

.submit-btn:not(:disabled):hover {
    background: #45a049;
    transform: translateY(-2px);
}

.clear-btn {
    background: var(--primary-red);
    color: white;
}

.clear-btn:hover {
    background: #d32f2f;
    transform: translateY(-2px);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    margin-top: 2rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-green), var(--primary-blue));
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

.game-message {
    text-align: center;
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--text-secondary);
}

/* Statistics Section */
.stats-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(33, 150, 243, 0.1), transparent);
    transition: left 0.6s;
}

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

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-blue);
}

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

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-primary);
}

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

.progress-chart {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.progress-chart h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.progress-chart canvas {
    width: 100%;
    max-width: 400px;
    height: 200px;
    margin: 0 auto;
    display: block;
}

.export-options {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.export-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.export-btn {
    background: var(--primary-purple);
    border: none;
    color: white;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
}

.export-btn:hover {
    background: #7B1FA2;
    transform: translateY(-2px);
}

/* Settings Section */
.settings-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 1rem;
}

.settings-group {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.settings-group h3 {
    margin-bottom: 1.5rem;
    color: var(--primary-blue);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 0.5rem;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 1.5rem 0;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.setting-item label {
    color: var(--text-primary);
    font-weight: 500;
}

/* Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.2);
    transition: var(--transition);
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: var(--transition);
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-green);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

/* Range Inputs */
input[type="range"] {
    width: 150px;
    height: 5px;
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.2);
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-blue);
    cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-blue);
    cursor: pointer;
    border: none;
}

.setting-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.danger-btn {
    background: var(--primary-red);
    border: none;
    color: white;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.danger-btn:hover {
    background: #d32f2f;
    transform: translateY(-2px);
}

/* FAQ Section */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
}

.faq-item {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    margin: 1rem 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--primary-blue);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    color: var(--text-primary);
    padding: 1.5rem;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 500;
    transition: var(--transition);
}

.faq-question:hover {
    background: rgba(255, 255, 255, 0.05);
}

.faq-icon {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

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

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-secondary);
    line-height: 1.6;
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-answer.show {
    opacity: 1;
    max-height: 200px;
    padding: 1.5rem;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(18, 18, 18, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-around;
    padding: 0.75rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    min-width: 60px;
}

.nav-item:hover {
    color: var(--primary-blue);
    background: rgba(33, 150, 243, 0.1);
}

.nav-item.active {
    color: var(--primary-blue);
    background: rgba(33, 150, 243, 0.2);
}

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

.nav-item span {
    font-size: 0.75rem;
    font-weight: 500;
}

/* Footer */
footer {
    background: var(--bg-card);
    color: var(--text-secondary);
    padding: 2rem 1rem;
    margin-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
}

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

.footer-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.footer-info p {
    margin: 0;
    color: var(--text-secondary);
    display: flex;
    justify-content: center;
    align-items: center;
}

.footer-link {
    color: var(--primary-blue);
    text-decoration: none;
 
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    background: rgba(33, 150, 243, 0.1);
    border: 1px solid rgba(33, 150, 243, 0.2);
    transition: var(--transition);
    font-weight: 500;
    
}

.footer-link:hover {
    background: rgba(33, 150, 243, 0.2);
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    color: var(--primary-blue);
}

.footer-social {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.social-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.75rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.social-link:hover {
    color: var(--primary-blue);
    background: rgba(33, 150, 243, 0.1);
    border-color: var(--primary-blue);
    transform: translateY(-2px);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .header-content h1 {
        font-size: 1.2rem;
    }
    
    .mode-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .difficulty-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .game-info {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }
    
    .footer-info {
        align-items: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .sequence-display {
        padding: 1rem;
        min-height: 150px;
    }
    
    .sequence-container {
        gap: 1rem;
        padding: 0.5rem;
    }
    
    .sequence-item {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .export-buttons {
        flex-direction: column;
    }
    
    .setting-item {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .mode-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .game-controls {
        flex-direction: column;
    }
    
    .sequence-item {
        width: 45px;
        height: 45px;
        font-size: 1rem;
    }
    
    .user-sequence-display {
        min-height: 80px;
        padding: 1rem;
        gap: 1rem;
    }
    
    .input-buttons {
        gap: 1rem;
        padding: 1rem;
    }
    
    .user-item {
        width: 50px;
        height: 50px;
        font-size: 1.1rem;
    }
}

/* Animations */
@keyframes slideInFromBottom {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes bounceIn {
    0% {
        transform: scale(0.3);
        opacity: 0;
    }
    50% {
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.bounce-in {
    animation: bounceIn 0.6s ease-out;
}

/* Loading Spinner */
.spinner {
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top: 3px solid var(--primary-blue);
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

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

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
button:focus,
input:focus,
.nav-item:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --bg-dark: #000000;
        --bg-card: #111111;
        --text-primary: #ffffff;
        --text-secondary: #cccccc;
    }
}