/* NEON DRIFT - Cyberpunk Arcade Game Styles */
:root {
    /* Acid Neon Palette */
    --neon-cyan: #00f0ff;
    --neon-pink: #ff00ff;
    --neon-lime: #ccff00;
    --neon-orange: #ff6b2b;
    --dark-bg: #0a0a0f;
    --darker-bg: #050508;
    --panel-bg: rgba(20, 20, 35, 0.9);
    --grid-line: rgba(0, 240, 255, 0.1);
    
    /* Typography */
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Rajdhani', sans-serif;
    
    /* Effects */
    --glow-cyan: 0 0 20px rgba(0, 240, 255, 0.5), 0 0 40px rgba(0, 240, 255, 0.3);
    --glow-pink: 0 0 20px rgba(255, 0, 255, 0.5), 0 0 40px rgba(255, 0, 255, 0.3);
    --glow-lime: 0 0 20px rgba(204, 255, 0, 0.5), 0 0 40px rgba(204, 255, 0, 0.3);
}

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

html, body {
    height: 100%;
    overflow: hidden;
    background: var(--darker-bg);
    font-family: var(--font-body);
    color: #fff;
}

/* CRT Scanlines Effect */
.scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.15),
        rgba(0, 0, 0, 0.15) 1px,
        transparent 1px,
        transparent 2px
    );
    animation: scanline-flicker 0.1s infinite;
}

@keyframes scanline-flicker {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.98; }
}

/* Vignette Effect */
.vignette {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 999;
    background: radial-gradient(
        ellipse at center,
        transparent 0%,
        transparent 50%,
        rgba(0, 0, 0, 0.4) 100%
    );
}

/* Game Container */
.game-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background: 
        linear-gradient(180deg, var(--dark-bg) 0%, var(--darker-bg) 100%),
        repeating-linear-gradient(
            90deg,
            var(--grid-line) 0px,
            var(--grid-line) 1px,
            transparent 1px,
            transparent 60px
        ),
        repeating-linear-gradient(
            0deg,
            var(--grid-line) 0px,
            var(--grid-line) 1px,
            transparent 1px,
            transparent 60px
        );
    position: relative;
}

/* Header */
.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: linear-gradient(180deg, rgba(0,0,0,0.8) 0%, transparent 100%);
    border-bottom: 1px solid rgba(0, 240, 255, 0.2);
    z-index: 100;
}

.logo {
    display: flex;
    flex-direction: column;
    line-height: 0.9;
}

.logo-neon {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 900;
    color: var(--neon-cyan);
    text-shadow: var(--glow-cyan);
    letter-spacing: 4px;
}

.logo-drift {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neon-pink);
    text-shadow: var(--glow-pink);
    letter-spacing: 8px;
    margin-left: 4px;
}

.score-board {
    display: flex;
    gap: 40px;
}

.score-item {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.score-item .label {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 2px;
    font-weight: 500;
}

.score-item .value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--neon-lime);
    text-shadow: var(--glow-lime);
    min-width: 80px;
    text-align: right;
}

/* Main Game Area */
.game-main {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

/* Screens */
.screen {
    position: absolute;
    inset: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.screen.hidden {
    opacity: 0;
    pointer-events: none;
    transform: scale(0.95);
}

.screen-content {
    text-align: center;
    padding: 40px;
}

/* Glitch Effect */
.glitch {
    font-family: var(--font-display);
    font-size: 5rem;
    font-weight: 900;
    color: var(--neon-cyan);
    text-shadow: var(--glow-cyan);
    position: relative;
    animation: glitch-skew 3s infinite;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.glitch::before {
    color: var(--neon-pink);
    animation: glitch-1 2s infinite;
    clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
    transform: translateX(-2px);
}

.glitch::after {
    color: var(--neon-lime);
    animation: glitch-2 2s infinite;
    clip-path: polygon(0 65%, 100% 65%, 100% 100%, 0 100%);
    transform: translateX(2px);
}

@keyframes glitch-1 {
    0%, 100% { transform: translateX(-2px); }
    20% { transform: translateX(2px); }
    40% { transform: translateX(-2px); }
    60% { transform: translateX(2px); }
    80% { transform: translateX(-2px); }
}

@keyframes glitch-2 {
    0%, 100% { transform: translateX(2px); }
    20% { transform: translateX(-2px); }
    40% { transform: translateX(2px); }
    60% { transform: translateX(-2px); }
    80% { transform: translateX(2px); }
}

@keyframes glitch-skew {
    0%, 100% { transform: skew(0deg); }
    10% { transform: skew(-2deg); }
    20% { transform: skew(2deg); }
    30% { transform: skew(0deg); }
}

.tagline {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 8px;
    margin-top: 20px;
    text-transform: uppercase;
}

.instructions {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin: 40px 0;
}

.instruction-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 1rem;
}

.key {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: 4px;
    font-family: var(--font-display);
    font-size: 0.875rem;
    color: var(--neon-cyan);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

/* Buttons */
.btn-start, .btn-restart {
    position: relative;
    padding: 20px 60px;
    background: transparent;
    border: 2px solid var(--neon-cyan);
    color: var(--neon-cyan);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 4px;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn-start:hover, .btn-restart:hover {
    background: var(--neon-cyan);
    color: var(--dark-bg);
    box-shadow: var(--glow-cyan);
    transform: translateY(-2px);
}

.btn-glow {
    position: absolute;
    inset: -2px;
    background: linear-gradient(45deg, var(--neon-cyan), var(--neon-pink), var(--neon-lime));
    opacity: 0;
    z-index: -1;
    filter: blur(20px);
    transition: opacity 0.3s ease;
}

.btn-start:hover .btn-glow,
.btn-restart:hover .btn-glow {
    opacity: 0.5;
}

/* Game Screen */
.game-screen {
    background: radial-gradient(ellipse at center, rgba(0, 240, 255, 0.05) 0%, transparent 70%);
}

#gameCanvas {
    border: 2px solid rgba(0, 240, 255, 0.3);
    box-shadow: 
        0 0 30px rgba(0, 240, 255, 0.2),
        inset 0 0 30px rgba(0, 240, 255, 0.05);
    background: rgba(10, 10, 15, 0.8);
}

.hud {
    position: absolute;
    bottom: 40px;
    left: 40px;
    right: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.energy-bar {
    position: relative;
    width: 300px;
    height: 30px;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: 2px;
    overflow: hidden;
}

.energy-fill {
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-lime));
    box-shadow: 0 0 20px var(--neon-cyan);
    transition: width 0.1s ease;
}

.energy-label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 2px;
    color: rgba(255, 255, 255, 0.8);
    text-shadow: 0 0 5px rgba(0, 0, 0, 0.8);
}

.combo {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 900;
    color: var(--neon-pink);
    text-shadow: var(--glow-pink);
    opacity: 0;
    transform: scale(0.5);
    transition: all 0.2s ease;
}

.combo.active {
    opacity: 1;
    transform: scale(1);
    animation: combo-pulse 0.5s ease;
}

@keyframes combo-pulse {
    0% { transform: scale(1.5); }
    100% { transform: scale(1); }
}

/* Game Over Screen */
.game-over-screen {
    background: radial-gradient(ellipse at center, rgba(255, 0, 0, 0.1) 0%, transparent 70%);
}

.game-over-title {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 900;
    color: var(--neon-orange);
    text-shadow: 0 0 30px var(--neon-orange);
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.final-stats {
    display: flex;
    gap: 60px;
    margin: 40px 0;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 3px;
    margin-bottom: 10px;
}

.stat-value {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: var(--neon-lime);
    text-shadow: var(--glow-lime);
}

/* Footer */
.game-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: linear-gradient(0deg, rgba(0,0,0,0.8) 0%, transparent 100%);
    border-top: 1px solid rgba(0, 240, 255, 0.2);
    z-index: 100;
}

.audio-control {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--neon-cyan);
    opacity: 0.6;
    transition: all 0.3s ease;
}

.audio-control:hover {
    opacity: 1;
    transform: scale(1.1);
}

.audio-control.muted {
    color: var(--neon-pink);
    opacity: 0.4;
}

.audio-control svg {
    width: 24px;
    height: 24px;
}

.fps-counter {
    font-family: var(--font-display);
    font-size: 0.875rem;
    color: var(--neon-lime);
    opacity: 0.7;
}

/* Responsive */
@media (max-width: 768px) {
    .game-header {
        padding: 15px 20px;
    }
    
    .logo-neon {
        font-size: 1.5rem;
    }
    
    .logo-drift {
        font-size: 1rem;
    }
    
    .score-board {
        gap: 20px;
    }
    
    .score-item .value {
        font-size: 1.5rem;
        min-width: 60px;
    }
    
    .glitch {
        font-size: 3rem;
    }
    
    .instructions {
        flex-direction: column;
        gap: 20px;
    }
    
    .final-stats {
        flex-direction: column;
        gap: 30px;
    }
    
    .energy-bar {
        width: 200px;
    }
    
    .hud {
        left: 20px;
        right: 20px;
        bottom: 20px;
    }
}