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

:root {
    --bg: #000000;
    --bg-dim: #0a0a0a;
    --primary: #00ff41;
    --primary-mid: #00cc33;
    --primary-dim: #00aa2d;
    --secondary: #00aaff;
    --tertiary: #ffaa00;
    --quaternary: #ff00aa;
    --text: #00ff41;
    --text-dim: #008822;
    --glow: rgba(0, 255, 65, 0.6);
}

body {
    background: var(--bg);
    font-family: 'Courier New', 'Consolas', monospace;
    color: var(--text);
    overflow: hidden;
    width: 100vw;
    height: 100vh;
}

#game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

#game-canvas {
    display: block;
    background: var(--bg);
}

/* HUD Styles */
#hud {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: 15px 25px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    pointer-events: none;
    z-index: 10;
}

#hud-left, #hud-right {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

#hud-center {
    text-align: center;
}

.hud-title {
    font-size: 14px;
    letter-spacing: 4px;
    color: var(--primary);
    text-shadow: 0 0 10px var(--glow);
    margin-bottom: 10px;
}

.hud-item {
    display: flex;
    gap: 10px;
    align-items: baseline;
}

.hud-label {
    font-size: 12px;
    color: var(--text-dim);
    letter-spacing: 2px;
}

.hud-value {
    font-size: 24px;
    color: var(--primary);
    text-shadow: 0 0 10px var(--glow);
    min-width: 60px;
}

.hud-unit {
    font-size: 12px;
    color: var(--text-dim);
    letter-spacing: 1px;
}

.position-label {
    font-size: 10px;
    color: var(--text-dim);
    letter-spacing: 3px;
    display: block;
}

.position-number {
    font-size: 36px;
    font-weight: bold;
    color: var(--primary);
    text-shadow: 0 0 15px var(--glow), 0 0 30px var(--glow);
}

/* Overlay Base Styles */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
}

.overlay.hidden {
    display: none;
}

.overlay-content {
    text-align: center;
    padding: 40px;
}

.title-text {
    font-size: 48px;
    letter-spacing: 8px;
    color: var(--primary);
    text-shadow: 0 0 20px var(--glow), 0 0 40px var(--glow);
    margin-bottom: 10px;
}

.subtitle-text {
    font-size: 16px;
    letter-spacing: 6px;
    color: var(--text-dim);
    margin-bottom: 40px;
}

.controls-info {
    margin: 30px 0;
    text-align: left;
    display: inline-block;
}

.control-row {
    font-size: 14px;
    color: var(--text-dim);
    margin: 10px 0;
    letter-spacing: 1px;
}

.key {
    display: inline-block;
    background: var(--bg-dim);
    border: 1px solid var(--primary-dim);
    padding: 4px 10px;
    color: var(--primary);
    min-width: 30px;
    text-align: center;
    box-shadow: 0 0 5px var(--glow);
}

/* Difficulty Selector */
.difficulty-selector {
    margin: 25px 0;
    text-align: center;
}

.difficulty-label {
    display: block;
    font-size: 12px;
    color: var(--text-dim);
    letter-spacing: 3px;
    margin-bottom: 10px;
}

.difficulty-options {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.difficulty-btn {
    background: var(--bg-dim);
    border: 1px solid var(--primary-dim);
    color: var(--text-dim);
    padding: 8px 20px;
    font-family: inherit;
    font-size: 14px;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.2s;
}

.difficulty-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.difficulty-btn.active {
    background: var(--primary-dim);
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: 0 0 10px var(--glow);
}

.start-prompt {
    font-size: 16px;
    color: var(--primary);
    letter-spacing: 3px;
    margin-top: 40px;
    animation: pulse 1.5s ease-in-out infinite;
}

/* Countdown Overlay */
#countdown-overlay {
    background: rgba(0, 0, 0, 0.7);
}

#countdown-text {
    font-size: 120px;
    font-weight: bold;
    color: var(--primary);
    text-shadow: 0 0 30px var(--glow), 0 0 60px var(--glow), 0 0 90px var(--glow);
    animation: countdownPulse 1s ease-out;
}

/* Finish Overlay */
#results-list {
    margin: 30px 0;
    text-align: left;
    display: inline-block;
}

.result-row {
    font-size: 18px;
    margin: 12px 0;
    padding: 8px 20px;
    letter-spacing: 2px;
    border-left: 3px solid transparent;
}

.result-row.player {
    color: var(--primary);
    border-left-color: var(--primary);
    text-shadow: 0 0 10px var(--glow);
}

.result-row.opponent {
    color: var(--text-dim);
}

.result-position {
    display: inline-block;
    width: 50px;
    font-weight: bold;
}

.result-name {
    display: inline-block;
    width: 120px;
}

.result-time {
    color: var(--primary-dim);
}

/* Animations */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes countdownPulse {
    0% { transform: scale(1.5); opacity: 0; }
    50% { transform: scale(1); opacity: 1; }
    100% { transform: scale(0.9); opacity: 0.8; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Responsive */
@media (max-width: 768px) {
    .title-text {
        font-size: 32px;
        letter-spacing: 4px;
    }

    .hud-value {
        font-size: 18px;
    }

    .position-number {
        font-size: 28px;
    }

    #countdown-text {
        font-size: 80px;
    }
}