:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --game-gradient: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%);
    --neon-blue: #00f5ff;
    --neon-pink: #ff006e;
    --neon-green: #39ff14;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.6);
}

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

body {
    background: var(--primary-gradient);
    background-size: 400% 400%;
    color: var(--text-primary);
    font-family: 'Space Grotesk', sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    animation: gradientShift 8s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* Animated stars background */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.stars::before,
.stars::after {
    content: '';
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 50%;
    animation: twinkle 3s infinite;
}

.stars::before {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
    box-shadow: 
        100px 200px 0 var(--neon-blue),
        200px 100px 0 var(--neon-pink),
        300px 300px 0 var(--neon-green),
        400px 50px 0 var(--text-primary),
        500px 250px 0 var(--neon-blue),
        600px 150px 0 var(--neon-pink),
        700px 350px 0 var(--neon-green);
}

.stars::after {
    top: 40%;
    left: 60%;
    animation-delay: 1.5s;
    box-shadow: 
        150px 100px 0 var(--neon-pink),
        250px 200px 0 var(--neon-green),
        350px 50px 0 var(--neon-blue),
        450px 300px 0 var(--text-primary),
        550px 150px 0 var(--neon-pink),
        650px 250px 0 var(--neon-green);
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

.container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header Styles */
.game-header {
    text-align: center;
    margin-bottom: 2rem;
}

.game-title {
    position: relative;
    display: inline-block;
}

.title-text {
    font-family: 'Orbitron', monospace;
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 900;
    letter-spacing: 0.2em;
    background: linear-gradient(45deg, var(--neon-blue), var(--neon-pink), var(--neon-green));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: neonGlow 2s ease-in-out infinite alternate, gradientShift 3s ease-in-out infinite;
    display: block;
    text-shadow: 0 0 30px rgba(0, 245, 255, 0.5);
}

.title-subtitle {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(0.9rem, 2vw, 1.2rem);
    font-weight: 300;
    letter-spacing: 0.3em;
    color: var(--text-secondary);
    display: block;
    margin-top: 0.5rem;
    text-transform: uppercase;
}

@keyframes neonGlow {
    from { 
        filter: drop-shadow(0 0 20px rgba(0, 245, 255, 0.7));
        transform: scale(1);
    }
    to { 
        filter: drop-shadow(0 0 30px rgba(255, 0, 110, 0.7));
        transform: scale(1.02);
    }
}

/* Game Area Styles */
.game-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.game-wrapper {
    position: relative;
    display: inline-block;
}

#pong {
    display: block;
    background: var(--game-gradient);
    border: 3px solid transparent;
    border-radius: 20px;
    box-shadow: 
        0 0 50px rgba(0, 0, 0, 0.5),
        inset 0 0 50px rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    position: relative;
    background-clip: padding-box;
}

#pong::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    background: linear-gradient(45deg, var(--neon-blue), var(--neon-pink), var(--neon-green), var(--neon-blue));
    background-size: 200% 200%;
    border-radius: 20px;
    z-index: -1;
    animation: borderGlow 3s linear infinite;
}

@keyframes borderGlow {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

#pong:hover {
    transform: scale(1.02);
    box-shadow: 
        0 0 60px rgba(0, 245, 255, 0.3),
        inset 0 0 50px rgba(255, 255, 255, 0.15);
}

/* Score Display */
.game-overlay {
    position: absolute;
    top: -60px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.score-display {
    display: flex;
    align-items: center;
    gap: 2rem;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    padding: 1rem 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

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

.score-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.score-value {
    font-family: 'Orbitron', monospace;
    font-size: 2rem;
    font-weight: 700;
    color: var(--neon-blue);
    text-shadow: 0 0 10px rgba(0, 245, 255, 0.5);
}

.score-divider {
    width: 2px;
    height: 40px;
    background: linear-gradient(to bottom, transparent, var(--neon-pink), transparent);
}

/* Game Controls */
.game-controls {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    padding: 1.5rem;
    max-width: 400px;
    width: 100%;
}

.control-group h3 {
    font-family: 'Orbitron', monospace;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--neon-green);
    text-align: center;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

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

.control-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.control-item:hover {
    background: rgba(0, 245, 255, 0.1);
    transform: translateY(-2px);
}

.control-item kbd {
    background: linear-gradient(145deg, #2a2a2a, #1a1a1a);
    color: var(--text-primary);
    padding: 0.5rem 0.8rem;
    border-radius: 8px;
    font-family: 'Orbitron', monospace;
    font-weight: 600;
    font-size: 0.9rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 2px 4px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.control-item span {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
}

/* Footer */
.game-footer {
    text-align: center;
    margin-top: 2rem;
}

.credit {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 25px;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.credit:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.credit-icon {
    font-size: 1.2rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-5px); }
    60% { transform: translateY(-3px); }
}

/* Responsive Design */
@media (max-width: 900px) {
    .container {
        padding: 1rem;
    }
    
    #pong {
        width: 100%;
        max-width: 90vw;
        height: auto;
        aspect-ratio: 8/5;
    }
    
    .score-display {
        position: static;
        transform: none;
        margin-bottom: 1rem;
        padding: 0.8rem 1.5rem;
        gap: 1.5rem;
    }
    
    .game-overlay {
        position: static;
        top: auto;
        left: auto;
        transform: none;
        margin-bottom: 1rem;
    }
    
    .controls-grid {
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }
    
    .control-item {
        flex-direction: row;
        justify-content: center;
        padding: 0.6rem;
    }
    
    .control-item kbd {
        margin-right: 0.8rem;
    }
}

@media (max-width: 600px) {
    .title-text {
        font-size: 2.5rem;
    }
    
    .score-display {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .score-divider {
        width: 40px;
        height: 2px;
        background: linear-gradient(to right, transparent, var(--neon-pink), transparent);
    }
}

/* Loading animation for when game starts */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}

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

/* Focus styles for better accessibility */
#pong:focus,
.control-item:focus-within {
    outline: 2px solid var(--neon-blue);
    outline-offset: 4px;
}