/* Nokia Snake Game Styling */
:root {
    --nokia-green: #0f0;
    --nokia-black: #000;
    --nokia-dark-green: #008000;
    --nokia-text-shadow: 0 0 5px rgba(0, 255, 0, 0.7);
}

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

body {
    background-color: var(--nokia-black);
    color: var(--nokia-green);
    font-family: 'Courier New', monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    overflow: hidden;
    touch-action: none;
    overscroll-behavior: contain;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.game-container {
    background-color: var(--nokia-black);
    padding: 20px;
    border-radius: 10px;
    max-width: 600px;
    width: 100%;
}

.game-title {
    color: var(--nokia-green);
    font-family: 'Courier New', monospace;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: var(--nokia-text-shadow);
    animation: pixel-flicker 2s infinite alternate;
}

.game-wrapper {
    background-color: var(--nokia-black);
    border: 3px solid var(--nokia-green);
    padding: 15px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 255, 0, 0.3);
}

#gameCanvas {
    background-color: var(--nokia-black);
    border: 2px solid var(--nokia-green);
    display: block;
    margin: 0 auto;
    width: 100%;
    max-width: 400px;
    height: auto;
    aspect-ratio: 1 / 1;
    box-shadow: var(--nokia-text-shadow);
}

.score-panel {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    color: var(--nokia-green);
    font-size: 1.2em;
    text-shadow: var(--nokia-text-shadow);
}

.game-controls .btn {
    background-color: var(--nokia-green);
    color: var(--nokia-black);
    border: none;
    margin: 0 5px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    font-family: 'Courier New', monospace;
    font-weight: bold;
    letter-spacing: 1px;
}

.game-controls .btn:hover {
    background-color: var(--nokia-dark-green);
    transform: scale(1.05);
    box-shadow: var(--nokia-text-shadow);
}

.game-controls .btn:disabled {
    background-color: #444;
    color: #888;
    cursor: not-allowed;
    transform: none;
}

.game-instructions {
    color: var(--nokia-green);
    background-color: rgba(0, 255, 0, 0.1);
    border: 1px solid var(--nokia-green);
    padding: 10px;
    border-radius: 5px;
    margin-top: 15px;
    text-shadow: 1px 1px 2px rgba(0, 255, 0, 0.3);
}   

.game-instructions h4 {
    color: var(--nokia-green);
    border-bottom: 1px solid var(--nokia-green);
    padding-bottom: 5px;
    text-shadow: var(--nokia-text-shadow);
}

/* Modal Styling */
.modal-content {
    background-color: var(--nokia-black);
    border: 2px solid var(--nokia-green);
}

.modal-header, .modal-footer {
    border-color: var(--nokia-green);
}

.modal-title {
    color: var(--nokia-green);
    text-shadow: var(--nokia-text-shadow);
}

.modal-body .table {
    color: var(--nokia-green);
}

.modal-body .table th {
    color: var(--nokia-green);
    border-color: var(--nokia-green);
}

.modal-body .table td {
    color: var(--nokia-green);
    border-color: var(--nokia-green);
}

.btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* Pixel Flicker Animation */
@keyframes pixel-flicker {
    0%, 100% { 
        opacity: 1; 
        text-shadow: var(--nokia-text-shadow);
    }
    50% { 
        opacity: 0.8; 
        text-shadow: 0 0 3px rgba(0, 255, 0, 0.5);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .game-container {
        padding: 10px;
    }

    .game-title {
        font-size: 1.8rem;
    }

    .score-panel {
        font-size: 1rem;
    }

    .game-controls .btn {
        padding: 8px 12px;
        font-size: 0.9rem;
    }
}

/* Prevent unwanted interactions */
canvas, button {
    -webkit-tap-highlight-color: transparent;
    touch-action: none;
}