:root {
    --primary-bg: #000;
    --primary-text: #fff;
    --neon-green: #39FF14;
    --neon-red: #FF3131;
    --neon-cyan: #00FFFF;
    --neon-yellow: #FFFF33;
    --retro-font: 'Press Start 2P', cursive;
}

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

body {
    background-color: var(--primary-bg);
    color: var(--primary-text);
    font-family: var(--retro-font);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
    user-select: none;
}

#game-container {
    position: relative;
    width: 800px;
    height: 600px;
    border: 4px solid var(--neon-cyan);
    box-shadow: 0 0 15px var(--neon-cyan);
}

canvas {
    display: block;
    background-color: #000;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10;
    text-align: center;
}

.hidden {
    display: none !important;
}

h1 {
    font-size: 40px;
    color: var(--neon-cyan);
    margin-bottom: 40px;
    text-shadow: 3px 3px var(--neon-red);
}

h2 {
    font-size: 30px;
    margin-bottom: 20px;
}

.menu-section {
    margin-bottom: 20px;
}

label {
    font-size: 14px;
    margin-right: 15px;
    color: var(--neon-green);
}

select {
    font-family: var(--retro-font);
    background-color: #222;
    color: #fff;
    padding: 8px;
    border: 2px solid var(--neon-cyan);
    cursor: pointer;
}

button {
    font-family: var(--retro-font);
    font-size: 20px;
    padding: 15px 30px;
    background-color: var(--neon-green);
    color: #000;
    border: none;
    cursor: pointer;
    margin-top: 20px;
    box-shadow: 4px 4px #005f00;
}

button:hover {
    background-color: #2ecc71;
    transform: translateY(2px);
    box-shadow: 2px 2px #005f00;
}

#hud {
    position: absolute;
    top: 20px;
    width: 100%;
    display: flex;
    justify-content: space-around;
    font-size: 16px;
    color: var(--neon-cyan);
    pointer-events: none;
}

#input-area {
    position: absolute;
    bottom: 30px;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

#math-input {
    font-family: var(--retro-font);
    font-size: 24px;
    background-color: #111;
    border: 3px solid var(--neon-green);
    color: var(--neon-green);
    padding: 10px;
    width: 200px;
    text-align: center;
    outline: none;
}

#mc-container {
    display: flex;
    gap: 15px;
}

.mc-button {
    font-family: var(--retro-font);
    font-size: 18px;
    padding: 12px 20px;
    background-color: #222;
    color: var(--neon-green);
    border: 2px solid var(--neon-green);
    cursor: pointer;
    min-width: 80px;
}

.mc-button:hover {
    background-color: var(--neon-green);
    color: #000;
}

#feedback-message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
    color: var(--neon-red);
    text-shadow: 2px 2px #000;
    pointer-events: none;
    text-align: center;
    white-space: pre-wrap;
}

#name-entry {
    margin: 20px 0;
}

#player-name {
    font-family: var(--retro-font);
    font-size: 18px;
    padding: 10px;
    background-color: #111;
    border: 2px solid var(--neon-cyan);
    color: var(--neon-cyan);
    text-align: center;
    outline: none;
    width: 250px;
}

#score-tabs {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
}

.tab-btn {
    font-family: var(--retro-font);
    font-size: 10px;
    padding: 8px 12px;
    background-color: #222;
    color: #fff;
    border: 1px solid #444;
    cursor: pointer;
    margin-top: 0;
    box-shadow: none;
}

.tab-btn.active {
    background-color: var(--neon-cyan);
    color: #000;
    border: 1px solid var(--neon-cyan);
}

#high-scores-table {
    width: 90%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

#high-scores-table th, #high-scores-table td {
    padding: 10px;
    font-size: 12px;
    text-align: center;
    border-bottom: 1px solid #333;
}

#high-scores-table th {
    color: var(--neon-yellow);
}

#high-scores-table td:nth-child(2) {
    color: var(--neon-cyan);
}

#high-scores-table td:nth-child(3) {
    color: var(--neon-green);
}