:root {
    --primary: #FF006E;
    --secondary: #00FF88;
    --tertiary: #00D4FF;
    --accent: #FFD700;
    --highlight: #FF0080;
    --bg-dark: #0a0a0a;
    --bg-medium: #1a1a1a;
    --bg-light: #2a2a2a;
    --text-light: #ffffff;
    --text-medium: #cccccc;
    --text-dark: #888888;
    --border-radius: 12px;
    --shadow: 0 4px 20px rgba(255, 0, 110, 0.3);
    --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%, var(--bg-medium) 100%);
    color: var(--text-light);
    min-height: 100vh;
    overflow-x: hidden;
    padding-bottom: 80px;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 0, 110, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 255, 136, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(0, 212, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

header {
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--primary);
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

header h1 {
    font-size: 1.5rem;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    margin-bottom: 0.5rem;
}

.score-display {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-medium);
}

.score-display span {
    background: rgba(255, 0, 110, 0.2);
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    border: 1px solid var(--primary);
}

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

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

.screen.active {
    display: block;
}

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

.content-container {
    background: rgba(26, 26, 26, 0.8);
    border-radius: var(--border-radius);
    padding: 2rem;
    border: 1px solid var(--primary);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}

.content-container h2 {
    color: var(--secondary);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    text-align: center;
}

/* Game Styles */
.game-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

#game-canvas {
    border: 2px solid var(--primary);
    border-radius: var(--border-radius);
    background: #000;
    box-shadow: var(--shadow);
    max-width: 100%;
    height: auto;
}

.game-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.8);
    border-radius: var(--border-radius);
    backdrop-filter: blur(5px);
}

.game-menu {
    background: linear-gradient(135deg, var(--bg-medium), var(--bg-light));
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 2px solid var(--primary);
    box-shadow: var(--shadow);
    max-width: 300px;
    width: 90%;
}

.game-menu h2 {
    color: var(--secondary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.game-menu p {
    color: var(--text-medium);
    margin-bottom: 1.5rem;
}

.game-btn {
    background: linear-gradient(45deg, var(--primary), var(--highlight));
    color: var(--text-light);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    margin: 0.5rem;
    min-width: 200px;
    box-shadow: 0 4px 15px rgba(255, 0, 110, 0.3);
}

.game-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(255, 0, 110, 0.5);
}

.game-btn:active {
    transform: translateY(0);
}

.hidden {
    display: none !important;
}

.tutorial-content {
    text-align: left;
    margin: 1rem 0;
}

.tutorial-content ul {
    margin: 0.5rem 0;
    padding-left: 1rem;
}

.tutorial-content li {
    margin: 0.25rem 0;
    color: var(--text-medium);
}

.game-controls {
    display: block;
}

.control-pad {
    display: grid;
    grid-template-rows: auto auto auto;
    gap: 0.5rem;
    align-items: center;
    justify-content: center;
}

.horizontal-controls {
    display: flex;
    gap: 3rem;
}

.control-btn {
    background: linear-gradient(45deg, var(--tertiary), var(--secondary));
    color: var(--text-light);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.control-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 25px rgba(0, 212, 255, 0.5);
}

.control-btn:active {
    transform: scale(0.95);
}

#new-record {
    color: var(--accent);
    font-weight: bold;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Leaderboard Styles */
.leaderboard-container {
    display: grid;
    gap: 2rem;
}

.personal-best, .recent-scores {
    background: rgba(42, 42, 42, 0.5);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--tertiary);
}

.personal-best h3, .recent-scores h3 {
    color: var(--accent);
    margin-bottom: 1rem;
    text-align: center;
}

.score-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: rgba(255, 0, 110, 0.1);
    border-radius: 8px;
    border: 1px solid var(--primary);
    margin-bottom: 0.5rem;
}

.rank {
    font-weight: bold;
    color: var(--accent);
    min-width: 30px;
}

.score {
    font-weight: bold;
    color: var(--secondary);
    font-size: 1.1rem;
}

.date {
    color: var(--text-dark);
    font-size: 0.8rem;
}

.no-scores {
    text-align: center;
    color: var(--text-dark);
    font-style: italic;
    padding: 2rem;
}

/* Settings Styles */
.settings-container {
    display: grid;
    gap: 1.5rem;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: rgba(42, 42, 42, 0.5);
    border-radius: var(--border-radius);
    border: 1px solid var(--tertiary);
}

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

.toggle-switch {
    position: relative;
    width: 50px;
    height: 24px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--text-dark);
    transition: var(--transition);
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition);
    border-radius: 50%;
}

input:checked + .slider {
    background: linear-gradient(45deg, var(--primary), var(--secondary));
}

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

select {
    background: var(--bg-light);
    color: var(--text-light);
    border: 1px solid var(--tertiary);
    padding: 0.5rem;
    border-radius: 8px;
    font-size: 1rem;
}

select option {
    background: var(--bg-light);
    color: var(--text-light);
}

.setting-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
}

.danger-btn {
    background: linear-gradient(45deg, #ff4444, #cc0000);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.danger-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(255, 68, 68, 0.5);
}

.secondary-btn {
    background: linear-gradient(45deg, var(--text-dark), var(--bg-light));
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.secondary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(136, 136, 136, 0.3);
}

/* Info Styles */
.info-container {
    display: grid;
    gap: 2rem;
}

.game-info h3 {
    color: var(--secondary);
    margin: 1.5rem 0 1rem 0;
    font-size: 1.2rem;
}

.game-info p {
    color: var(--text-medium);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.game-info ul {
    color: var(--text-medium);
    line-height: 1.6;
    margin-left: 1rem;
}

.game-info li {
    margin-bottom: 0.5rem;
}

/* FAQ Styles */
.faq-section {
    margin-top: 2rem;
}

.faq-section h2 {
    color: var(--accent);
    margin-bottom: 1.5rem;
    text-align: center;
}

.faq-container {
    display: grid;
    gap: 1rem;
}

.faq-item {
    background: rgba(42, 42, 42, 0.5);
    border-radius: var(--border-radius);
    border: 1px solid var(--tertiary);
    overflow: hidden;
}

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

.faq-question:hover {
    background: rgba(0, 212, 255, 0.1);
}

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

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

.faq-answer {
    padding: 0 1rem 1rem 1rem;
    color: var(--text-medium);
    line-height: 1.6;
    animation: slideDown 0.3s ease-in-out;
}

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

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

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    border-top: 2px solid var(--primary);
    display: flex;
    justify-content: space-around;
    padding: 0.5rem 0;
    z-index: 1000;
    box-shadow: 0 -4px 20px rgba(255, 0, 110, 0.3);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition);
    padding: 0.5rem;
    border-radius: 8px;
    min-width: 60px;
}

.nav-item i {
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}

.nav-item span {
    font-size: 0.7rem;
    font-weight: 500;
}

.nav-item:hover,
.nav-item.active {
    color: var(--primary);
    background: rgba(255, 0, 110, 0.1);
    transform: translateY(-2px);
}

/* Footer */
footer {
    text-align: center;
    padding: 1rem;
    color: var(--text-dark);
    font-size: 0.8rem;
    background: rgba(26, 26, 26, 0.5);
    margin-top: 2rem;
    border-top: 1px solid var(--bg-light);
}

/* Responsive Design */
@media (max-width: 480px) {
    header {
        padding: 0.75rem;
    }
    
    header h1 {
        font-size: 1.25rem;
    }
    
    .score-display {
        font-size: 0.8rem;
    }
    
    main {
        padding: 0.5rem;
    }
    
    .content-container {
        padding: 1.5rem;
    }
    
    #game-canvas {
        width: 100%;
        max-width: 350px;
    }
    
    .game-menu {
        padding: 1.5rem;
    }
    
    .control-btn {
        width: 45px;
        height: 45px;
        font-size: 1rem;
    }
    
    .horizontal-controls {
        gap: 2rem;
    }
    
    .setting-actions {
        flex-direction: column;
    }
    
    .nav-item span {
        font-size: 0.6rem;
    }
}

@media (min-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .score-display {
        font-size: 1rem;
    }
    
    main {
        padding: 2rem;
    }
    
    .content-container {
        padding: 3rem;
    }
    
    .leaderboard-container {
        grid-template-columns: 1fr 1fr;
    }
    
    .settings-container {
        max-width: 600px;
        margin: 0 auto;
    }
    
    .game-controls {
        display: none;
    }
    
    #game-canvas {
        width: 400px;
        height: 600px;
    }
}

@media (min-width: 1024px) {
    .info-container {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }
    
    .faq-section {
        grid-column: 1 / -1;
    }
}

/* Touch and Interaction Improvements */
@media (hover: none) and (pointer: coarse) {
    .game-btn,
    .control-btn,
    .nav-item {
        -webkit-tap-highlight-color: transparent;
        touch-action: manipulation;
    }
    
    .game-btn:active,
    .control-btn:active {
        transform: scale(0.95);
    }
}

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

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --primary: #ff0080;
        --secondary: #00ff00;
        --tertiary: #0080ff;
        --accent: #ffff00;
        --bg-dark: #000000;
        --bg-medium: #111111;
        --bg-light: #333333;
        --text-light: #ffffff;
    }
}