body {
    font-family: 'Courier New', monospace;
    margin: 0;
    padding: 20px;
    background-color: #1a1a1a;
    color: #00ff00;
    text-align: center;
}

.welcome-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #1a1a1a;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    text-align: center;
}

.welcome-screen h1 {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 0 0 20px #00ff00;
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { text-shadow: 0 0 20px #00ff00; }
    to { text-shadow: 0 0 30px #00ff00, 0 0 40px #00ff00; }
}

.welcome-buttons {
    display: flex;
    gap: 20px;
    margin-top: 30px;
}

.welcome-button {
    background-color: #333;
    color: #00ff00;
    border: 3px solid #00ff00;
    padding: 15px 30px;
    margin: 10px;
    cursor: pointer;
    font-family: 'Courier New', monospace;
    font-size: 20px;
    transition: all 0.3s ease;
}

.welcome-button:hover {
    background-color: #00ff00;
    color: #000;
    transform: scale(1.05);
}

.game-container {
    display: none;
    max-width: 1200px;
    margin: 0 auto;
}

.game-header {
    margin-bottom: 20px;
}

.stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
    font-size: 18px;
    font-weight: bold;
    flex-wrap: wrap;
    gap: 10px;
}

.stats div {
    background-color: #333;
    padding: 10px 20px;
    border-radius: 5px;
    border: 2px solid #00ff00;
    min-width: 120px;
    transition: all 0.3s ease;
}

.lives {
    border-color: #ff6600 !important;
    color: #ff6600;
}

.fuel-bonus {
    background-color: #004400 !important;
    border-color: #00ff88 !important;
    color: #00ff88 !important;
    transform: scale(1.1);
    text-shadow: 0 0 15px #00ff88;
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.5);
}

.life-bonus {
    background-color: #440022 !important;
    border-color: #ff6600 !important;
    color: #ff6600 !important;
    transform: scale(1.1);
    text-shadow: 0 0 15px #ff6600;
    box-shadow: 0 0 20px rgba(255, 102, 0, 0.5);
}

.game-board-container {
    position: relative;
    display: inline-block;
}

.game-board {
    display: grid;
    grid-template-columns: repeat(35, 25px);
    grid-template-rows: repeat(25, 25px);
    gap: 1px;
    justify-content: center;
    background-color: #444;
    padding: 15px;
    border: 3px solid #00ff00;
    margin: 0 auto;
}

.cell {
    width: 25px;
    height: 25px;
    border: 1px solid #666;
}

.cell.clean {
    background-color: #AA6720;
}

.cell.dirty {
    background-color: #2a2a2a;
}

.cell.player {
    background-color: #00ff00;
    border: 2px solid #ffffff;
}

.controls {
    margin-top: 20px;
}

.button {
    background-color: #333;
    color: #00ff00;
    border: 2px solid #00ff00;
    padding: 10px 20px;
    margin: 5px;
    cursor: pointer;
    font-family: 'Courier New', monospace;
    font-size: 16px;
}

.button:hover {
    background-color: #00ff00;
    color: #000;
}

.button:disabled {
    background-color: #555;
    color: #888;
    border-color: #888;
    cursor: not-allowed;
}

.instructions {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #1a1a1a;
    border: 3px solid #00ff00;
    padding: 30px;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    z-index: 1000;
}

.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 999;
}

.close-btn {
    float: right;
    background: none;
    border: none;
    color: #00ff00;
    font-size: 24px;
    cursor: pointer;
}

.game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #ff0000;
    font-size: 24px;
    background-color: #1a1a1a;
    border: 3px solid #ff0000;
    padding: 20px;
    text-align: center;
    z-index: 100;
    text-shadow: 0 0 10px #ff0000;
}

.modal {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #1a1a1a;
    border: 3px solid #ffaa00;
    padding: 30px;
    text-align: center;
    z-index: 200;
    color: #ffaa00;
    font-size: 18px;
    min-width: 300px;
}

.pause-modal {
    border-color: #ff6600;
    color: #ff6600;
}

.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 199;
}

.leaderboard-modal {
    border-color: #00ff00;
    color: #00ff00;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
}

.leaderboard-table {
    font-family: 'Courier New', monospace;
    text-align: left;
    margin: 20px 0;
    border-collapse: collapse;
    width: 100%;
}

.leaderboard-table th,
.leaderboard-table td {
    padding: 8px 16px;
    border-bottom: 1px solid #333;
}

.leaderboard-table th {
    color: #00ff00;
    border-bottom: 2px solid #00ff00;
}

.leaderboard-table .rank {
    text-align: right;
    width: 40px;
}

.leaderboard-table .name {
    width: 150px;
}

.leaderboard-table .score {
    text-align: right;
    width: 100px;
}

.new-record {
    background-color: #004400 !important;
    color: #00ff88 !important;
    animation: highlight 1s ease-in-out infinite alternate;
}

@keyframes highlight {
    from { background-color: #004400; }
    to { background-color: #006600; }
}

.name-input {
    background-color: #333;
    color: #00ff00;
    border: 2px solid #00ff00;
    padding: 10px;
    font-family: 'Courier New', monospace;
    font-size: 16px;
    text-align: center;
    width: 200px;
    margin: 10px;
}

.name-input:focus {
    outline: none;
    box-shadow: 0 0 10px #00ff00;
}

h1 {
    color: #00ff00;
    text-shadow: 0 0 10px #00ff00;
}

.instructions h3 {
    color: #00ff00;
    margin-top: 20px;
}

.instructions ul {
    text-align: left;
}