:root {
    --bg-color: #050510;
    --text-color: #e0e0ff;
    --neon-green: oklch(0.85 0.15 150);
    --neon-pink: oklch(0.65 0.25 330);
    --neon-blue: oklch(0.7 0.15 250);
    --neon-gold: oklch(0.85 0.2 80);
    --neon-red: oklch(0.6 0.25 20);
    --neon-ghost: oklch(0.85 0.1 200); /* Cyan-ish */
    --neon-poison: oklch(0.6 0.25 300); /* Purple */
    --grid-color: rgba(255, 255, 255, 0.03);
    --canvas-bg: #0a0a1a;
}

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

body {
    font-family: system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
    touch-action: none; /* Prevent scroll on mobile swipe */
}

.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 1rem;
    max-width: 100%;
}

header {
    text-align: center;
    width: 100%;
}

h1 {
    font-size: 2.5rem;
    color: var(--neon-pink);
    text-shadow: 0 0 10px var(--neon-pink), 0 0 20px var(--neon-pink);
    margin-bottom: 0.5rem;
    letter-spacing: 2px;
}

.score-board {
    display: flex;
    justify-content: space-between;
    width: 100%;
    max-width: 400px;
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--neon-blue);
    text-shadow: 0 0 5px var(--neon-blue);
}

.canvas-wrapper {
    position: relative;
    border: 2px solid var(--neon-blue);
    border-radius: 8px;
    box-shadow: 0 0 15px var(--neon-blue), inset 0 0 10px var(--neon-blue);
    background-color: var(--canvas-bg);
    overflow: hidden;
}

canvas {
    display: block;
    /* Grid background pattern */
    background-image: 
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 20px 20px;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(5, 5, 16, 0.85);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
    transition: opacity 0.3s;
}

.overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.menu {
    text-align: center;
    background: rgba(10, 10, 30, 0.9);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--neon-pink);
    box-shadow: 0 0 20px rgba(255, 20, 147, 0.3);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.menu.hidden {
    display: none;
}

.menu h2 {
    color: var(--neon-green);
    text-shadow: 0 0 10px var(--neon-green);
    font-size: 2rem;
}

.menu p {
    color: #ccc;
    font-size: 1rem;
}

.neon-button {
    background: transparent;
    color: var(--neon-blue);
    border: 2px solid var(--neon-blue);
    padding: 0.8rem 1.5rem;
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 6px;
    cursor: pointer;
    text-transform: uppercase;
    transition: all 0.2s ease;
    margin-top: 1rem;
    outline: none;
}

.neon-button:hover, .neon-button:focus {
    background: var(--neon-blue);
    color: var(--bg-color);
    box-shadow: 0 0 15px var(--neon-blue);
}

.mobile-controls {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.row {
    display: flex;
    gap: 0.5rem;
}

.control-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--neon-blue);
    color: var(--neon-blue);
    font-size: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.control-btn:active {
    background: var(--neon-blue);
    color: var(--bg-color);
    box-shadow: 0 0 10px var(--neon-blue);
}

.mobile-hint {
    display: none;
}

/* Responsive adjustments */
@media (max-width: 600px) {
    .mobile-controls {
        display: flex;
    }
    .mobile-hint {
        display: block;
        color: var(--neon-blue);
        margin-top: 0.5rem;
    }
    .canvas-wrapper {
        max-width: 95vw;
        max-height: 95vw;
    }
    canvas {
        width: 100%;
        height: auto;
    }
}

/* Difficulty Selector */
.difficulty-selector {
    margin-bottom: 1rem;
    color: var(--neon-blue);
}

.difficulty-selector select {
    background: transparent;
    border: 1px solid var(--neon-blue);
    color: var(--neon-blue);
    padding: 0.3rem;
    border-radius: 4px;
    outline: none;
    font-size: 1rem;
    cursor: pointer;
}

.difficulty-selector select option {
    background: var(--bg-color);
    color: var(--neon-blue);
}

/* Legend */
.legend {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 1rem;
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    display: inline-block;
}

.normal-apple { background-color: var(--neon-pink); box-shadow: 0 0 5px var(--neon-pink); }
.gold-apple { background-color: var(--neon-gold); box-shadow: 0 0 5px var(--neon-gold); }
.ghost-apple { background-color: var(--neon-ghost); box-shadow: 0 0 5px var(--neon-ghost); }
.poison-apple { background-color: var(--neon-poison); box-shadow: 0 0 5px var(--neon-poison); }

/* CRT Effect */
.crt-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        rgba(18, 16, 16, 0) 50%, 
        rgba(0, 0, 0, 0.25) 50%), 
        linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
    background-size: 100% 4px, 6px 100%;
    pointer-events: none;
    z-index: 5;
    opacity: 0.6;
}

/* Screen Shake Animation */
@keyframes shake {
    0% { transform: translate(1px, 1px) rotate(0deg); }
    10% { transform: translate(-1px, -2px) rotate(-1deg); }
    20% { transform: translate(-3px, 0px) rotate(1deg); }
    30% { transform: translate(3px, 2px) rotate(0deg); }
    40% { transform: translate(1px, -1px) rotate(1deg); }
    50% { transform: translate(-1px, 2px) rotate(-1deg); }
    60% { transform: translate(-3px, 1px) rotate(0deg); }
    70% { transform: translate(3px, 1px) rotate(-1deg); }
    80% { transform: translate(-1px, -1px) rotate(1deg); }
    90% { transform: translate(1px, 2px) rotate(0deg); }
    100% { transform: translate(1px, -2px) rotate(-1deg); }
}

.shake {
    animation: shake 0.4s cubic-bezier(.36,.07,.19,.97) both;
}

/* Score Input and List Styles */
#score-input-section {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
    width: 100%;
}

#player-name {
    background: transparent;
    border: 1px solid var(--neon-blue);
    color: var(--neon-blue);
    padding: 0.6rem;
    font-size: 1rem;
    border-radius: 4px;
    outline: none;
    text-align: center;
    width: 100%;
}

#player-name:focus {
    box-shadow: 0 0 10px var(--neon-blue);
}

.small-btn {
    padding: 0.5rem 1rem;
    font-size: 1rem;
    margin-top: 0;
}

#high-score-list-container {
    margin-top: 0.5rem;
    text-align: left;
    background: rgba(0, 0, 0, 0.4);
    padding: 0.8rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    width: 100%;
    max-width: 280px;
}

#high-score-list-container h3 {
    color: var(--neon-pink);
    font-size: 1rem;
    margin-bottom: 0.4rem;
    text-align: center;
}

#high-score-list {
    list-style: none;
    color: #fff;
    font-size: 0.9rem;
    padding: 0;
    max-height: 160px; /* Fixed height for mobile */
    overflow-y: auto;  /* Internal scroll */
    scrollbar-width: thin;
    scrollbar-color: var(--neon-blue) transparent;
}

/* Custom scrollbar for webkit */
#high-score-list::-webkit-scrollbar {
    width: 4px;
}
#high-score-list::-webkit-scrollbar-thumb {
    background: var(--neon-blue);
    border-radius: 10px;
}

#high-score-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.4rem 0.2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.score-item-name-group {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.diff-badge {
    font-size: 0.55rem;
    padding: 1px 4px;
    border-radius: 3px;
    font-weight: bold;
    text-transform: uppercase;
    border: 1px solid transparent;
}

.diff-badge.easy {
    color: var(--neon-green);
    border-color: var(--neon-green);
}

.diff-badge.medium {
    color: var(--neon-blue);
    border-color: var(--neon-blue);
}

.diff-badge.hard {
    color: var(--neon-pink);
    border-color: var(--neon-pink);
}

#high-score-list li:last-child {
    border-bottom: none;
}

/* Compact Menu for Mobile */
@media (max-height: 700px) {
    .menu {
        padding: 1rem;
        gap: 0.5rem;
    }
    .menu h2 {
        font-size: 1.5rem;
    }
    #high-score-list {
        max-height: 120px;
    }
}