:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --dark-gradient: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.37);
    --text-primary: #ffffff;
    --text-secondary: #b8b9ba;
    --text-muted: #8a8b8d;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%);
    min-height: 100vh;
    color: var(--text-primary);
    overflow-x: hidden;
    position: relative;
}

.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.7;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    top: -250px;
    left: -250px;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #f093fb, #f5576c);
    bottom: -200px;
    right: -200px;
    animation-delay: -7s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

.premium-nav {
    padding: 1.5rem 0;
    backdrop-filter: blur(20px);
    background: rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.logo-text {
    font-family: 'Poppins', sans-serif;
    font-weight: 800;
    font-size: 1.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-sub {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 0.1em;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: 1px;
}

.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.game-header {
    text-align: center;
    margin-bottom: 3rem;
}

.game-title {
    font-family: 'Poppins', sans-serif;
    font-size: 3rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.game-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.game-dashboard {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: 2rem;
    align-items: start;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 1.5rem;
    padding: 2rem;
    box-shadow: var(--glass-shadow);
}

.score-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.score-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.player-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
}

.player-x {
    background: var(--primary-gradient);
}

.player-o {
    background: var(--secondary-gradient);
}

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

.score-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.score-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
}

.score-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.game-board-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: center;
}

.game-status {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.game-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.cell {
    width: 100px;
    height: 100px;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 1rem;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cell:hover:not(.disabled) {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.cell.x {
    color: #667eea;
    background: rgba(102, 126, 234, 0.2);
}

.cell.o {
    color: #f093fb;
    background: rgba(240, 147, 251, 0.2);
}

.cell.disabled {
    cursor: not-allowed;
    opacity: 0.8;
}

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

.control-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.control-btn.primary {
    background: var(--accent-gradient);
    color: white;
}

.control-btn.secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.control-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.stats-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-align: center;
}

.stats-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

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

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.winner-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.winner-modal.show {
    display: flex;
}

.modal-content {
    max-width: 400px;
    width: 90%;
    text-align: center;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.winner-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.winner-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.winner-message {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn-icon {
    font-size: 1rem;
}

@media (max-width: 768px) {
    .game-dashboard {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .game-title {
        font-size: 2rem;
    }
    
    .game-subtitle {
        font-size: 1rem;
    }
    
    .cell {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }
    
    .game-board {
        gap: 0.5rem;
    }
    
    .nav-container {
        padding: 0 1rem;
    }
    
    .main-container {
        padding: 1rem;
    }
    
    .glass-card {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .cell {
        width: 70px;
        height: 70px;
        font-size: 1.75rem;
    }
    
    .game-controls {
        flex-direction: column;
        align-items: center;
    }
    
    .control-btn {
        width: 100%;
        max-width: 200px;
    }
}