:root {
    --color-primary: #FF006E;
    --color-secondary: #FB5607;
    --color-accent: #FFBE0B;
    --color-purple: #8338EC;
    --color-blue: #3A86FF;
    --color-white: #FFFFFF;
    --color-black: #000000;
    --color-gray-light: #F5F5F5;
    --color-gray-medium: #CCCCCC;
    --color-gray-dark: #666666;
    --color-background: #1A1A1A;
    --color-surface: #2A2A2A;
    --color-success: #00FF88;
    --color-error: #FF3366;
    --color-warning: #FFAA00;
    
    --shadow-neon-primary: 0 0 10px var(--color-primary), 0 0 20px var(--color-primary), 0 0 30px var(--color-primary);
    --shadow-neon-secondary: 0 0 10px var(--color-secondary), 0 0 20px var(--color-secondary);
    --shadow-neon-accent: 0 0 10px var(--color-accent), 0 0 20px var(--color-accent);
    --shadow-neon-blue: 0 0 10px var(--color-blue), 0 0 20px var(--color-blue);
    --shadow-neon-purple: 0 0 10px var(--color-purple), 0 0 20px var(--color-purple);
    
    --border-radius: 12px;
    --border-radius-small: 8px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-md: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-xxl: 32px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, var(--color-background) 0%, #2A1A3A 100%);
    color: var(--color-white);
    min-height: 100vh;
    padding-bottom: 80px;
    overflow-x: hidden;
}

.app-header {
    background: var(--color-surface);
    padding: var(--spacing-md);
    text-align: center;
    border-bottom: 2px solid var(--color-primary);
    box-shadow: var(--shadow-neon-primary);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-header h1 {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    color: var(--color-primary);
    text-shadow: var(--shadow-neon-primary);
}

.app-main {
    padding: var(--spacing-md);
    max-width: 500px;
    margin: 0 auto;
}

.section {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.section.active {
    display: block;
}

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

/* Game Section */
.game-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    background: var(--color-surface);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-blue);
    box-shadow: var(--shadow-neon-blue);
}

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

.info-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-gray-medium);
    margin-bottom: var(--spacing-xs);
}

.info-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-accent);
    text-shadow: var(--shadow-neon-accent);
}

.game-board-container {
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: center;
}

.game-board {
    display: grid;
    gap: 2px;
    background: var(--color-surface);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 2px solid var(--color-purple);
    box-shadow: var(--shadow-neon-purple);
    max-width: 100%;
    aspect-ratio: 1;
}

.game-board.size-4 { grid-template-columns: repeat(4, 1fr); }
.game-board.size-5 { grid-template-columns: repeat(5, 1fr); }
.game-board.size-6 { grid-template-columns: repeat(6, 1fr); }

.game-cell {
    aspect-ratio: 1;
    border: 1px solid var(--color-gray-medium);
    border-radius: var(--border-radius-small);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-md);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
    min-width: 40px;
    min-height: 40px;
}

.game-cell:hover {
    transform: scale(1.05);
}

.game-cell:active {
    transform: scale(0.95);
}

.game-cell.white {
    background: var(--color-white);
    color: var(--color-black);
    border-color: var(--color-gray-dark);
}

.game-cell.black {
    background: var(--color-black);
    color: var(--color-white);
    border-color: var(--color-primary);
    box-shadow: inset var(--shadow-neon-primary);
}

.game-cell.uncertain {
    background: var(--color-gray-medium);
    color: var(--color-black);
    border-color: var(--color-warning);
}

.game-cell.clue {
    background: var(--color-blue);
    color: var(--color-white);
    font-weight: 700;
    border-color: var(--color-blue);
    box-shadow: var(--shadow-neon-blue);
    cursor: default;
}

.game-cell.clue:hover {
    transform: none;
}

.game-cell.error {
    animation: shake 0.5s ease-in-out;
    border-color: var(--color-error) !important;
    box-shadow: 0 0 10px var(--color-error);
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.game-controls {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.control-btn {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    min-height: 48px;
}

.control-btn:hover {
    transform: translateY(-2px);
}

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

.control-btn.primary {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: var(--shadow-neon-primary);
}

.control-btn.secondary {
    background: var(--color-secondary);
    color: var(--color-white);
    box-shadow: var(--shadow-neon-secondary);
}

.control-btn.accent {
    background: var(--color-accent);
    color: var(--color-black);
    box-shadow: var(--shadow-neon-accent);
}

.control-btn.danger {
    background: var(--color-error);
    color: var(--color-white);
    box-shadow: 0 0 10px var(--color-error);
}

.control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.game-legend {
    display: flex;
    justify-content: space-around;
    background: var(--color-surface);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-dark);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.legend-cell {
    width: 20px;
    height: 20px;
    border-radius: var(--border-radius-small);
    border: 1px solid var(--color-gray-medium);
}

.legend-cell.white { background: var(--color-white); }
.legend-cell.black { background: var(--color-black); }
.legend-cell.uncertain { background: var(--color-gray-medium); }

/* Stats Section */
.stats-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--color-blue);
    box-shadow: var(--shadow-neon-blue);
}

.stat-number {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    color: var(--color-accent);
    text-shadow: var(--shadow-neon-accent);
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-medium);
}

/* Help Section */
.help-content {
    margin-bottom: var(--spacing-xl);
}

.rule-card {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--color-purple);
    box-shadow: var(--shadow-neon-purple);
}

.rule-card h3 {
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.rule-card p, .rule-card li {
    color: var(--color-gray-light);
    line-height: 1.6;
}

.rule-card ul {
    padding-left: var(--spacing-lg);
}

.rule-card li {
    margin-bottom: var(--spacing-sm);
}

/* FAQ Section */
.faq-section {
    margin-top: var(--spacing-xl);
}

.faq-section h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-xl);
    text-align: center;
}

.faq-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.faq-item {
    background: var(--color-surface);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-dark);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: var(--spacing-lg);
    background: transparent;
    border: none;
    color: var(--color-white);
    font-size: var(--font-size-md);
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

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

.faq-icon {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    transition: transform 0.2s ease;
}

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

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-gray-light);
    line-height: 1.6;
    animation: slideDown 0.3s ease-out;
}

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

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

/* Settings Section */
.settings-container {
    margin-bottom: var(--spacing-xl);
}

.setting-group {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--color-gray-dark);
}

.setting-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-md);
    font-weight: 600;
}

.setting-select {
    background: var(--color-background);
    color: var(--color-white);
    border: 1px solid var(--color-gray-medium);
    border-radius: var(--border-radius-small);
    padding: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

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

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

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-gray-dark);
    border-radius: 24px;
    transition: 0.2s;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: var(--color-white);
    border-radius: 50%;
    transition: 0.2s;
}

input:checked + .toggle-slider {
    background: var(--color-primary);
    box-shadow: var(--shadow-neon-primary);
}

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

.settings-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-surface);
    display: flex;
    border-top: 2px solid var(--color-primary);
    box-shadow: 0 -2px 20px rgba(255, 0, 110, 0.3);
    z-index: 1000;
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-sm);
    text-decoration: none;
    color: var(--color-gray-medium);
    transition: all 0.2s ease;
    border-radius: 0;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.nav-item.active {
    color: var(--color-primary);
    text-shadow: var(--shadow-neon-primary);
}

.nav-item i {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.nav-item span {
    font-size: var(--font-size-xs);
    font-weight: 600;
}

/* Notification */
.notification {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-success);
    color: var(--color-black);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: 600;
    z-index: 2000;
    box-shadow: 0 4px 20px rgba(0, 255, 136, 0.3);
    display: none;
    animation: slideInDown 0.3s ease-out;
}

.notification.error {
    background: var(--color-error);
    color: var(--color-white);
    box-shadow: 0 4px 20px rgba(255, 51, 102, 0.3);
}

.notification.warning {
    background: var(--color-warning);
    color: var(--color-black);
    box-shadow: 0 4px 20px rgba(255, 170, 0, 0.3);
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 3000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    animation: fadeIn 0.3s ease-out;
}

.modal-content {
    background: var(--color-surface);
    margin: 15% auto;
    padding: 0;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 400px;
    border: 2px solid var(--color-primary);
    box-shadow: var(--shadow-neon-primary);
    animation: slideInUp 0.3s ease-out;
}

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

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-gray-dark);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    color: var(--color-primary);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    color: var(--color-gray-medium);
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--color-white);
}

.modal-body {
    padding: var(--spacing-lg);
    color: var(--color-gray-light);
    line-height: 1.6;
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-dark);
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

/* Footer */
footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--color-gray-medium);
    font-size: var(--font-size-sm);
    border-top: 1px solid var(--color-gray-dark);
    margin-top: var(--spacing-xl);
}

/* Responsive Design */
@media (max-width: 480px) {
    :root {
        --font-size-xs: 10px;
        --font-size-sm: 12px;
        --font-size-md: 14px;
        --font-size-lg: 16px;
        --font-size-xl: 20px;
        --font-size-xxl: 24px;
    }
    
    .app-main {
        padding: var(--spacing-sm);
    }
    
    .game-controls {
        flex-direction: column;
    }
    
    .stats-container {
        grid-template-columns: 1fr;
    }
    
    .settings-actions {
        flex-direction: column;
    }
    
    .game-legend {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .modal-content {
        margin: 10% auto;
        width: 95%;
    }
}

@media (min-width: 768px) {
    .app-main {
        max-width: 600px;
    }
    
    .game-board {
        max-width: 400px;
    }
    
    .stats-container {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1024px) {
    body {
        padding-bottom: 0;
    }
    
    .bottom-nav {
        position: static;
        border-top: none;
        border-bottom: 2px solid var(--color-primary);
        box-shadow: 0 2px 20px rgba(255, 0, 110, 0.3);
        order: -1;
    }
    
    .app-main {
        max-width: 800px;
        padding-top: var(--spacing-xl);
    }
}

/* 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 {
        --color-background: #000000;
        --color-surface: #1A1A1A;
        --color-gray-medium: #FFFFFF;
        --color-gray-light: #FFFFFF;
    }
}

/* Print styles */
@media print {
    .bottom-nav,
    .game-controls,
    .notification,
    .modal {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .game-board {
        border: 2px solid black;
        box-shadow: none;
    }
}