:root {
    --primary-dark: #05386B;
    --primary-medium: #379683;
    --primary-light: #5CDB95;
    --accent-light: #8EE4AF;
    --background-light: #EDF5E1;
    --neon-glow: 0 0 5px currentColor, 0 0 10px currentColor;
    --neon-text-glow: 0 0 3px currentColor, 0 0 6px currentColor;
}

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

html {
    overflow-x: hidden;
    width: 100%;
   
}

body {
    font-family: 'Courier New', monospace;
    background: linear-gradient(135deg, var(--primary-dark) 0%, #000 100%);
    color: var(--background-light);
    min-height: 100vh;
    overflow-x: hidden;
    filter: brightness(0.9);
    margin: 0;
    padding: 0;
    width: 100%;
    box-sizing: border-box;
}

/* Game Container */
.game-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    overflow-x: hidden;
    width: 100%;
    box-sizing: border-box;
    min-height: 100vh;
    justify-content: flex-start;
}

/* Header Styles */
.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 800px;
    padding: 20px 0;
}

.game-title {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-light);
    text-shadow: var(--neon-text-glow);
    letter-spacing: 3px;
    animation: pulse-glow 2s infinite alternate;
}

@keyframes pulse-glow {
    from {
        text-shadow: 0 0 3px var(--primary-light), 0 0 6px var(--primary-light);
    }
    to {
        text-shadow: 0 0 6px var(--primary-light), 0 0 12px var(--primary-light);
    }
}

.score-board {
    display: flex;
    gap: 30px;
}

.score-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 20px;
    border: 2px solid var(--accent-light);
    border-radius: 10px;
    background: rgba(5, 56, 107, 0.2);
    box-shadow: 0 0 6px var(--accent-light);
}

.score-label {
    font-size: 0.9rem;
    color: var(--accent-light);
    margin-bottom: 5px;
}

.score-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-light);
    text-shadow: var(--neon-text-glow);
}

/* Game Area */
.game-area {
    position: relative;
    border: 2px solid var(--primary-light);
    border-radius: 15px;
    box-shadow: 0 0 8px var(--primary-light);
    background: rgba(0, 0, 0, 0.8);
    overflow: hidden;
    width: 100%;
    max-width: 800px;
    min-height: 400px;
    max-height: 70vh;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Large screens - remove height limit */
@media (min-width: 1200px) {
    .game-area {
        max-height: none;
    }
}

#gameCanvas {
    display: block;
    background: #000000;
    border-radius: 10px;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
    object-fit: cover;
}

/* Game Overlay */
.game-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 10;
    cursor: pointer;
    outline: none;
}

.game-overlay.active {
    display: flex;
}

.overlay-content {
    text-align: center;
    padding: 40px;
    border: 2px solid var(--primary-light);
    border-radius: 15px;
    background: rgba(5, 56, 107, 0.8);
    box-shadow: 0 0 10px var(--primary-light);
}

.overlay-title {
    font-size: 2rem;
    color: var(--primary-light);
    text-shadow: var(--neon-text-glow);
    margin-bottom: 20px;
}

.overlay-message {
    font-size: 1.2rem;
    color: var(--accent-light);
}

/* Control Panel */
.control-panel {
    width: 100%;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
}

.game-modes {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.mode-btn {
    padding: 12px 24px;
    background: transparent;
    border: 2px solid var(--primary-medium);
    color: var(--primary-medium);
    font-family: inherit;
    font-size: 1rem;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.mode-btn:hover,
.mode-btn.active {
    background: var(--primary-medium);
    color: var(--primary-dark);
    box-shadow: 0 0 6px var(--primary-medium);
    text-shadow: none;
}

.game-controls {
    display: flex;
    gap: 15px;
}

.control-btn {
    padding: 10px 20px;
    background: transparent;
    border: 2px solid var(--accent-light);
    color: var(--accent-light);
    font-family: inherit;
    font-size: 0.9rem;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.control-btn:hover {
    background: var(--accent-light);
    color: var(--primary-dark);
    box-shadow: 0 0 5px var(--accent-light);
}

/* Mobile Controls */
.mobile-controls {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin: 10px 0;
    padding: 12px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    border: 1px solid rgba(55, 150, 131, 0.2);
}

.mobile-controls-title {
    color: var(--accent-light);
    font-size: 0.8rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 3px;
}

.mobile-controls .dpad-container {
    display: flex;
    gap: 15px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

/* Quando multiplayer está ativo, os controles ficam lado a lado */
.mobile-controls.multiplayer-active .dpad-container {
    flex-direction: row;
    gap: 80px;
}

.dpad {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-rows: 1fr 1fr 1fr;
    gap: 5px;
    width: 120px;
    height: 120px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 16px;
    padding: 8px;
    border: 2px solid rgba(55, 150, 131, 0.3);
    position: relative;
}

.dpad-label {
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-medium);
    color: var(--primary-dark);
    font-size: 0.8rem;
    font-weight: bold;
    padding: 2px 8px;
    border-radius: 10px;
    z-index: 1;
}

.dpad-up {
    grid-column: 2;
    grid-row: 1;
}

.dpad-middle {
    grid-column: 1 / 4;
    grid-row: 2;
    display: flex;
    justify-content: space-between;
}

.dpad-down {
    grid-column: 2;
    grid-row: 3;
}

.dpad-btn {
    width: 32px;
    height: 32px;
    background: rgba(55, 150, 131, 0.3);
    border: 2px solid var(--primary-medium);
    color: var(--primary-light);
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 9px;
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.dpad-btn:active,
.dpad-btn.touch-active {
    background: var(--primary-medium);
    box-shadow: 0 0 8px var(--primary-medium);
    transform: scale(0.9);
}

.multiplayer-dpad {
    pointer-events: auto;
}

.multiplayer-dpad .dpad {
    background: rgba(0, 0, 0, 0.25);
    border: 2px solid rgba(142, 228, 175, 0.4);
}

.multiplayer-dpad .dpad-label {
    background: var(--accent-light);
    color: var(--primary-dark);
}

.multiplayer-dpad .dpad-btn {
    background: rgba(142, 228, 175, 0.3);
    border-color: var(--accent-light);
    color: var(--accent-light);
}

.multiplayer-dpad .dpad-btn:active,
.multiplayer-dpad .dpad-btn.touch-active {
    background: var(--accent-light);
    box-shadow: 0 0 8px var(--accent-light);
}

/* Instructions */
.instructions {
    text-align: center;
    color: var(--accent-light);
    font-size: 0.9rem;
    line-height: 1.6;
}

.instruction-item {
    margin: 5px 0;
}

/* Footer */
.footer {
    margin-top: 40px;
    padding: 20px;
    text-align: center;
    border-top: 1px solid var(--primary-medium);
    background: rgba(5, 56, 107, 0.2);
    width: 100%;
    box-sizing: border-box;
}

.footer p {
    color: var(--accent-light);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .game-container {
        padding: 10px;
        gap: 15px;
    }
    
    .game-title {
        font-size: 1.8rem;
    }
    
    .game-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .game-area {
        max-width: 100%;
        min-height: 300px;
        max-height: 50vh;
        border-radius: 10px;
        border-width: 1px;
        overflow: hidden;
        width: 100%;
    }
    
    #gameCanvas {
        width: 100% !important;
        height: 100% !important;
        max-width: 100% !important;
        max-height: 100% !important;
    }
    
    .mobile-controls {
        display: flex;
    }
    
    .game-modes {
        flex-direction: column;
        width: 100%;
    }
    
    .mode-btn {
        width: 100%;
    }
    
    .control-panel {
        width: 100%;
    }
    
    .score-board {
        gap: 20px;
    }
    
    .instructions {
        font-size: 0.8rem;
    }
    
    .footer {
        margin-top: 20px;
        padding: 15px;
    }
}

@media (max-width: 480px) {
    .game-container {
        padding: 5px;
        gap: 10px;
    }
    
    .game-title {
        font-size: 1.5rem;
        letter-spacing: 2px;
    }
    
    .score-item {
        padding: 8px 15px;
    }
    
    .score-value {
        font-size: 1.2rem;
    }
    
    .mobile-controls {
        margin: 10px 0;
        padding: 10px;
    }
    
    .mobile-controls .dpad-container {
        flex-direction: row;
        gap: 10px;
    }
    
    .mobile-controls.multiplayer-active .dpad-container {
        flex-direction: row;
        gap: 10px;
    }
    
    .dpad {
        width: 110px;
        height: 110px;
        gap: 4px;
        padding: 7px;
    }
    
    .dpad-btn {
        width: 30px;
        height: 30px;
        font-size: 1rem;
    }
    
    .overlay-content {
        padding: 20px;
        margin: 20px;
    }
    
    .overlay-title {
        font-size: 1.5rem;
    }
    
    .overlay-message {
        font-size: 1rem;
    }
    
    .game-area {
        max-width: 100%;
        min-height: 250px;
        max-height: 40vh;
        border-radius: 8px;
        border-width: 1px;
        margin: 0 5px;
        overflow: hidden;
        width: 100%;
    }
    
    #gameCanvas {
        width: 100% !important;
        height: 100% !important;
        max-width: 100% !important;
        max-height: 100% !important;
    }
    
    .footer {
        margin-top: 15px;
        padding: 10px;
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    #gameCanvas {
        image-rendering: pixelated;
        image-rendering: -moz-crisp-edges;
        image-rendering: crisp-edges;
    }
}

/* Extra small screens */
@media (max-width: 360px) {
    .game-container {
        padding: 2px;
        gap: 8px;
    }
    
    .game-title {
        font-size: 1.2rem;
        letter-spacing: 1px;
    }
    
    .score-board {
        gap: 10px;
    }
    
    .score-item {
        padding: 5px 10px;
    }
    
    .score-value {
        font-size: 1rem;
    }
    
    .mobile-controls {
        margin: 5px 0;
        padding: 8px;
    }
    
    .dpad {
        width: 100px;
        height: 100px;
        gap: 3px;
        padding: 6px;
    }
    
    .dpad-btn {
        width: 28px;
        height: 28px;
        font-size: 0.9rem;
    }
    
    .game-area {
        max-width: 100%;
        min-height: 200px;
        max-height: 35vh;
        border-radius: 6px;
        border-width: 1px;
        margin: 0 2px;
        overflow: hidden;
        width: 100%;
    }
    
    #gameCanvas {
        width: 100% !important;
        height: 100% !important;
        max-width: 100% !important;
        max-height: 100% !important;
        border-radius: 6px;
    }
    
    .game-container {
        min-height: auto;
        justify-content: flex-start;
    }
    
    .footer {
        margin-top: 10px;
        padding: 8px;
    }
}

/* Animations */
@keyframes snake-glow {
    0% { box-shadow: 0 0 3px var(--primary-light); }
    50% { box-shadow: 0 0 8px var(--primary-light), 0 0 12px var(--primary-light); }
    100% { box-shadow: 0 0 3px var(--primary-light); }
}

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

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

/* Focus styles for accessibility */
button:focus,
.dpad-btn:focus {
    outline: 2px solid var(--primary-light);
    outline-offset: 2px;
}

/* Prevent horizontal overflow */
@media (max-width: 100vw) {
    body, html, .game-container {
        overflow-x: hidden;
        max-width: 100vw;
    }
}

/* Large screens - better alignment */
@media (min-width: 1200px) {
    .game-container {
        max-width: 1000px;
        padding: 30px;
    }
    
    .game-area {
        max-width: 999px;
        min-height: 600px;
        max-height: none;
    }
    
    #gameCanvas {
        width: 100%;
        height: 100%;
    }
}

/* Extra large screens */
@media (min-width: 1600px) {
    .game-container {
        max-width: 1200px;
        padding: 40px;
    }
    
    .game-area {
        max-width: 1000px;
        min-height: 900px;
        max-height: none;
    }
    
    #gameCanvas {
        width: 100%;
        height: 100%;
    }
}