/* <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark>
   NEON RIDER - RETRO STYLE
   <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark> */

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

:root {
    --neon-pink: #FF10F0;
    --neon-cyan: #00F0FF;
    --neon-purple: #B026FF;
    --neon-yellow: #FFF01F;
    --neon-green: #39FF14;
    --dark-bg: #0a0a0a;
    --grid-color: #1a1a2e;
}

body {
    margin: 0;
    padding: 0;
    background: var(--dark-bg);
    font-family: 'Courier New', monospace;
    color: var(--neon-cyan);
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.game-container {
    position: relative;
    width: 100%;
    max-width: 800px;
    height: 600px;
    background: var(--dark-bg);
    border: 2px solid var(--neon-cyan);
    box-shadow: 
        0 0 20px var(--neon-cyan),
        inset 0 0 20px rgba(0, 240, 255, 0.1);
}

/* <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark>
   CANVAS
   <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark> */

#gameCanvas {
    display: block;
    width: 100%;
    height: 100%;
    background: var(--dark-bg);
}

/* <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark>
   SCREENS
   <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark> */

.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(10, 10, 10, 0.95);
    z-index: 10;
    transition: opacity 0.3s ease;
}

.screen.hidden {
    display: none;
}

/* <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark>
   NEON TEXT EFFECTS
   <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark> */

.neon-title {
    font-size: 4rem;
    font-weight: bold;
    color: var(--neon-pink);
    text-shadow: 
        0 0 10px var(--neon-pink),
        0 0 20px var(--neon-pink),
        0 0 30px var(--neon-pink),
        0 0 40px var(--neon-pink);
    margin-bottom: 20px;
    letter-spacing: 8px;
    animation: flicker 3s infinite alternate;
}

@keyframes flicker {
    0%, 18%, 22%, 25%, 53%, 57%, 100% {
        text-shadow: 
            0 0 10px var(--neon-pink),
            0 0 20px var(--neon-pink),
            0 0 30px var(--neon-pink),
            0 0 40px var(--neon-pink);
    }
    20%, 24%, 55% {
        text-shadow: none;
    }
}

.subtitle {
    font-size: 1.2rem;
    color: var(--neon-cyan);
    margin-bottom: 30px;
    text-shadow: 0 0 10px var(--neon-cyan);
}

.neon-text {
    color: var(--neon-yellow);
    text-shadow: 
        0 0 10px var(--neon-yellow),
        0 0 20px var(--neon-yellow);
}

/* <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark>
   BUTTONS
   <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark> */

.neon-button {
    background: transparent;
    border: 2px solid var(--neon-cyan);
    color: var(--neon-cyan);
    padding: 15px 40px;
    font-size: 1.5rem;
    font-family: 'Courier New', monospace;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 3px;
    transition: all 0.3s ease;
    box-shadow: 
        0 0 10px var(--neon-cyan),
        inset 0 0 10px rgba(0, 240, 255, 0.1);
}

.neon-button:hover {
    background: var(--neon-cyan);
    color: var(--dark-bg);
    box-shadow: 
        0 0 20px var(--neon-cyan),
        0 0 30px var(--neon-cyan),
        inset 0 0 20px rgba(0, 240, 255, 0.5);
    transform: scale(1.05);
}

.neon-button:active {
    transform: scale(0.98);
}

/* <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark>
   CONTROLS INFO
   <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark> */

.controls-info {
    background: rgba(26, 26, 46, 0.5);
    border: 1px solid var(--neon-purple);
    padding: 20px 40px;
    margin: 20px 0;
    border-radius: 5px;
    box-shadow: 
        0 0 10px var(--neon-purple),
        inset 0 0 10px rgba(176, 38, 255, 0.1);
}

.controls-info p {
    margin: 5px 0;
    color: var(--neon-purple);
    font-size: 1rem;
    text-shadow: 0 0 5px var(--neon-purple);
}

/* <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark>
   HIGH SCORE
   <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark> */

.high-score {
    margin-top: 30px;
    font-size: 1.2rem;
    color: var(--neon-yellow);
    text-shadow: 0 0 10px var(--neon-yellow);
}

.new-high-score {
    color: var(--neon-green);
    font-size: 1.5rem;
    text-shadow: 
        0 0 10px var(--neon-green),
        0 0 20px var(--neon-green);
    animation: pulse 1s infinite;
    margin: 20px 0;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark>
   HUD (Heads Up Display)
   <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark> */

.hud {
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    z-index: 5;
    pointer-events: none;
}

.hud.hidden {
    display: none;
}

.hud-item {
    background: rgba(10, 10, 10, 0.8);
    border: 1px solid var(--neon-cyan);
    padding: 10px 20px;
    border-radius: 5px;
    box-shadow: 
        0 0 10px var(--neon-cyan),
        inset 0 0 10px rgba(0, 240, 255, 0.1);
    min-width: 150px;
}

.hud-item .label {
    display: block;
    font-size: 0.8rem;
    color: var(--neon-cyan);
    margin-bottom: 5px;
    text-shadow: 0 0 5px var(--neon-cyan);
}

.hud-item .value {
    display: block;
    font-size: 1.5rem;
    color: var(--neon-yellow);
    font-weight: bold;
    text-shadow: 0 0 10px var(--neon-yellow);
}

/* <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark>
   SHIELD BAR
   <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark> */

.bar {
    width: 100%;
    height: 20px;
    background: rgba(26, 26, 46, 0.5);
    border: 1px solid var(--neon-green);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
}

.bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--neon-green), var(--neon-cyan));
    box-shadow: 
        0 0 10px var(--neon-green),
        0 0 20px var(--neon-green);
    transition: width 0.3s ease;
}

/* <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark>
   GAME OVER STATS
   <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark> */

.stats {
    background: rgba(26, 26, 46, 0.5);
    border: 1px solid var(--neon-pink);
    padding: 30px 50px;
    margin: 30px 0;
    border-radius: 5px;
    box-shadow: 
        0 0 20px var(--neon-pink),
        inset 0 0 20px rgba(255, 16, 240, 0.1);
}

.stats p {
    margin: 15px 0;
    font-size: 1.3rem;
    color: var(--neon-cyan);
    text-shadow: 0 0 10px var(--neon-cyan);
}

/* <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark>
   RESPONSIVE
   <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark> */

@media (max-width: 768px) {
    .game-container {
        height: 100vh;
        max-width: 100%;
        border: none;
    }

    .neon-title {
        font-size: 2.5rem;
        letter-spacing: 4px;
    }

    .subtitle {
        font-size: 1rem;
    }

    .neon-button {
        font-size: 1.2rem;
        padding: 12px 30px;
    }

    .hud {
        flex-direction: column;
        gap: 10px;
    }

    .hud-item {
        min-width: 120px;
        padding: 8px 15px;
    }

    .controls-info {
        padding: 15px 25px;
    }
}
@keyframes glow {
    0%, 100% {
        box-shadow: 
            0 0 10px var(--neon-cyan),
            0 0 20px var(--neon-cyan);
    }
    50% {
        box-shadow: 
            0 0 20px var(--neon-cyan),
            0 0 40px var(--neon-cyan),
            0 0 60px var(--neon-cyan);
    }
}
/* <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark>
   ADDITIONAL ANIMATIONS
   <mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark><mark>=</mark> */

@keyframes slideDown {
    from {
        transform: translateX(-50%) translateY(-100px);
        opacity: 0;
    }
    to {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
    to {
        transform: translateX(-50%) translateY(-100px);
        opacity: 0;
    }
}

/* Achievement notification styling */
.achievement-notification {
    animation: slideDown 0.5s ease;
}

/* Glowing border animation */
@keyframes borderGlow {
    0%, 100% {
        box-shadow: 
            0 0 20px var(--neon-cyan),
            inset 0 0 20px rgba(0, 240, 255, 0.1);
    }
    50% {
        box-shadow: 
            0 0 40px var(--neon-cyan),
            0 0 60px var(--neon-cyan),
            inset 0 0 30px rgba(0, 240, 255, 0.2);
    }
}

.game-container {
    animation: borderGlow 3s infinite;
}