/* --- Global Reset & Variables --- */
:root {
    --bg-dark: #070913;
    --card-bg: rgba(13, 17, 33, 0.65);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-main: #e2e8f0;
    --text-muted: #64748b;
    
    /* Neon Theme Colors */
    --neon-green: #39ff14;
    --neon-green-glow: rgba(57, 255, 20, 0.4);
    --neon-pink: #ff007f;
    --neon-pink-glow: rgba(255, 0, 127, 0.4);
    --neon-gold: #ffb700;
    --neon-gold-glow: rgba(255, 183, 0, 0.4);
    --neon-blue: #00f0ff;
    --neon-blue-glow: rgba(0, 240, 255, 0.4);
    
    --shadow-premium: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow-x: hidden;
    padding: 20px;
}

/* --- Dynamic Cyberpunk Background --- */
.stars-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -3;
    background-image: 
        radial-gradient(white, rgba(255,255,255,.2) 2px, transparent 40px),
        radial-gradient(white, rgba(255,255,255,.15) 1px, transparent 30px),
        radial-gradient(white, rgba(255,255,255,.1) 2px, transparent 40px);
    background-size: 550px 550px, 350px 350px, 250px 250px;
    background-position: 0 0, 40px 60px, 130px 270px;
    opacity: 0.15;
}

.glow-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -2;
    opacity: 0.25;
    pointer-events: none;
    animation: orbFloat 20s infinite alternate ease-in-out;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: var(--neon-green);
    top: -100px;
    right: -100px;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: var(--neon-pink);
    bottom: -150px;
    left: -150px;
    animation-delay: -5s;
}

@keyframes orbFloat {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 80px) scale(1.1); }
}

/* --- Layout Container --- */
.container {
    width: 100%;
    max-width: 1100px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    z-index: 1;
}

/* --- Header Section --- */
header {
    text-align: center;
}

.logo {
    font-family: 'Orbitron', sans-serif;
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: 6px;
    margin-bottom: 6px;
}

.logo span {
    display: inline-block;
    transition: var(--transition-smooth);
}

.logo:hover span {
    transform: scale(1.05) translateY(-2px);
}

.subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    letter-spacing: 4px;
    text-transform: uppercase;
}

/* --- Responsive Layout --- */
.game-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 24px;
    align-items: start;
}

/* --- Glassmorphism UI Panels --- */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-premium);
    padding: 20px;
    margin-bottom: 20px;
    transition: var(--transition-smooth);
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.45);
}

.panel-left {
    display: flex;
    flex-direction: column;
}

/* Scoreboard */
.scoreboard {
    display: flex;
    flex-direction: column;
    gap: 16px;
    border-left: 4px solid var(--neon-green);
}

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

.score-item .label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.digital-value {
    font-family: 'Orbitron', monospace;
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: 2px;
}

.digital-value.small {
    font-size: 1.4rem;
}

.score-divider {
    height: 1px;
    background: linear-gradient(90deg, var(--card-border) 0%, rgba(255,255,255,0.02) 100%);
}

.score-sub-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.score-sub-item {
    display: flex;
    flex-direction: column;
}

.score-sub-item .label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 2px;
}

/* Settings Form */
.settings-panel h3, .legend-panel h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 1px;
    text-transform: uppercase;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 8px;
}

.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.setting-row:last-child {
    margin-bottom: 0;
}

.setting-row label {
    font-size: 0.85rem;
    color: var(--text-main);
}

/* Style Select Options */
select {
    background: rgba(10, 12, 22, 0.8);
    color: var(--text-main);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 6px 10px;
    font-size: 0.85rem;
    outline: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

select:focus {
    border-color: var(--neon-green);
    box-shadow: 0 0 10px var(--neon-green-glow);
}

/* Toggle Switches */
.toggle-switch {
    position: relative;
    width: 48px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-switch label {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(255, 255, 255, 0.1);
    transition: .4s;
    border-radius: 24px;
    border: 1px solid var(--card-border);
}

.toggle-switch label:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

.toggle-switch input:checked + label {
    background-color: rgba(57, 255, 20, 0.2);
    border-color: var(--neon-green);
}

.toggle-switch input:checked + label:before {
    transform: translateX(24px);
    background-color: var(--neon-green);
    box-shadow: 0 0 8px var(--neon-green);
}

/* Legend items */
.legend-items {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.legend-color {
    width: 14px;
    height: 14px;
    border-radius: 4px;
}

.food-normal {
    background: var(--neon-pink);
    box-shadow: 0 0 8px var(--neon-pink-glow);
}

.food-gold {
    background: var(--neon-gold);
    box-shadow: 0 0 8px var(--neon-gold-glow);
}

.food-speed {
    background: var(--neon-blue);
    box-shadow: 0 0 8px var(--neon-blue-glow);
}

.legend-desc {
    font-size: 0.8rem;
    color: var(--text-main);
}

/* --- Center: Game Board --- */
.game-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.canvas-container {
    position: relative;
    border-radius: 20px;
    padding: 6px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.01));
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-premium);
    overflow: hidden;
}

#game-canvas {
    background-color: #0b0c16;
    border-radius: 14px;
    display: block;
    max-width: 100%;
    aspect-ratio: 1/1;
    box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.8);
}

/* --- Overlay Screen Base --- */
.overlay-screen {
    position: absolute;
    top: 6px;
    left: 6px;
    right: 6px;
    bottom: 6px;
    border-radius: 14px;
    background: rgba(7, 9, 19, 0.9);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

.overlay-screen.active {
    opacity: 1;
    pointer-events: auto;
}

.overlay-content {
    text-align: center;
    padding: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    max-width: 80%;
}

.overlay-content h2 {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.5rem;
    font-weight: 900;
    letter-spacing: 2px;
}

.overlay-content p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.key-badge {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    padding: 2px 8px;
    font-family: monospace;
    font-weight: bold;
    color: var(--text-main);
    display: inline-block;
    margin: 0 2px;
}

/* Buttons */
.btn {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    padding: 14px 28px;
    font-size: 0.95rem;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.btn:active {
    transform: scale(0.96);
}

.btn-primary {
    background: var(--neon-green);
    color: #000;
    box-shadow: 0 0 15px var(--neon-green-glow);
}

.btn-primary:hover {
    box-shadow: 0 0 25px var(--neon-green);
    transform: translateY(-2px);
}

.btn-warning {
    background: var(--neon-gold);
    color: #000;
    box-shadow: 0 0 15px var(--neon-gold-glow);
}

.btn-warning:hover {
    box-shadow: 0 0 25px var(--neon-gold);
    transform: translateY(-2px);
}

.btn-danger {
    background: var(--neon-pink);
    color: #fff;
    box-shadow: 0 0 15px var(--neon-pink-glow);
}

.btn-danger:hover {
    box-shadow: 0 0 25px var(--neon-pink);
    transform: translateY(-2px);
}

/* Gameover Score display */
.final-score-box {
    margin: 10px 0;
}

.final-score-box p {
    font-size: 1.2rem;
    color: var(--text-main);
}

.final-score-box span {
    font-family: 'Orbitron', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    display: block;
    margin-top: 8px;
}

.new-record-tag {
    font-size: 0.95rem;
    margin-top: 10px;
    font-weight: bold;
    animation: flash 1s infinite alternate;
}

/* --- Control Panel & Mobile Joystick --- */
.game-controls {
    width: 100%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.desktop-tips {
    display: flex;
    justify-content: center;
    gap: 20px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.desktop-tips strong {
    color: var(--text-main);
    background: rgba(255,255,255,0.05);
    padding: 1px 6px;
    border-radius: 4px;
}

.mobile-joystick {
    display: none; /* Hidden on desktop, shown via media queries */
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
}

.joy-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.joy-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    font-size: 1.2rem;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    touch-action: manipulation;
    user-select: none;
    transition: var(--transition-smooth);
}

.joy-btn:active {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--neon-blue);
    box-shadow: 0 0 15px var(--neon-blue-glow);
    color: var(--neon-blue);
    transform: scale(0.92);
}

.joy-center {
    width: 56px;
    height: 56px;
}

/* --- Footer --- */
footer {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 1px;
    margin-top: 10px;
}

/* --- Neon Glow helper classes --- */
.neon-text-green {
    color: var(--neon-green);
    text-shadow: 0 0 10px var(--neon-green-glow);
}

.neon-text-pink {
    color: var(--neon-pink);
    text-shadow: 0 0 10px var(--neon-pink-glow);
}

.neon-text-gold {
    color: var(--neon-gold);
    text-shadow: 0 0 10px var(--neon-gold-glow);
}

.neon-text-blue {
    color: var(--neon-blue);
    text-shadow: 0 0 10px var(--neon-blue-glow);
}

/* --- Animations --- */
@keyframes pulse {
    0% { transform: scale(1); opacity: 0.9; }
    100% { transform: scale(1.03); opacity: 1; }
}

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

@keyframes flash {
    0% { opacity: 0.4; }
    100% { opacity: 1; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.shake {
    animation: shake 0.6s ease;
}

.hidden {
    display: none !important;
}

/* --- Media Queries --- */
@media (max-width: 900px) {
    body {
        padding: 10px;
    }
    
    .game-layout {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .panel-left {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    
    .glass-card {
        margin-bottom: 0;
    }
    
    .legend-panel {
        grid-column: span 2;
    }
}

@media (max-width: 600px) {
    .panel-left {
        grid-template-columns: 1fr;
    }
    
    .legend-panel {
        grid-column: span 1;
    }
    
    .logo {
        font-size: 2.2rem;
    }
    
    .overlay-content h2 {
        font-size: 1.8rem;
    }
    
    .desktop-tips {
        display: none; /* Hide keyboard hints on small mobile */
    }
    
    .mobile-joystick {
        display: flex; /* Show touch controls on mobile */
    }
}

/* Landscape orientation optimization for mobile */
@media (max-height: 600px) and (orientation: landscape) {
    body {
        align-items: flex-start;
    }
    
    .game-layout {
        grid-template-columns: 240px 1fr;
    }
    
    .panel-left {
        display: flex;
        flex-direction: column;
    }
}