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

body {
    background: #0a0a0f;
    color: #00ff00;
    font-family: 'Courier New', monospace;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
    overflow: hidden;
}

.container {
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

h1 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 30px;
    text-shadow: 0 0 10px #00ff00;
    letter-spacing: 6px;
    flex-shrink: 0;
}

.main-panel {
    display: flex;
    gap: 60px;
    background: #111;
    border: 2px solid #333;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.1);
    flex: 1;
    align-items: stretch;
}

.reactor-view {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.reactor-vessel {
    width: 300px;
    height: 400px;
    background: linear-gradient(180deg, #1a1a2e 0%, #0f0f1a 100%);
    border: 3px solid #444;
    border-radius: 10px;
    position: relative;
    overflow: hidden;
}

.reactor-core {
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
    height: 300px;
    background: #1a1a1a;
    border: 2px solid #333;
    border-radius: 5px;
    overflow: hidden;
}

.core-glow {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: radial-gradient(ellipse at bottom, rgba(0, 150, 255, 0.3) 0%, transparent 70%);
    pointer-events: none;
    transition: all 0.3s;
}

.control-rods {
    display: flex;
    justify-content: space-around;
    padding: 0 20px;
    height: 100%;
    position: relative;
    z-index: 2;
}

.rod {
    width: 20px;
    height: 80%;
    background: linear-gradient(180deg, #666 0%, #444 50%, #666 100%);
    border-radius: 3px;
    transform: translateY(-100%);
    transition: transform 0.2s ease-out;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
}

.rod-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
}

.rod-btn {
    width: 200px;
    padding: 20px;
    font-family: 'Courier New', monospace;
    font-size: 1.2rem;
    font-weight: bold;
    border: 2px solid;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.1s;
}

.rod-btn.up {
    background: #1a3a1a;
    border-color: #00aa00;
    color: #00ff00;
}

.rod-btn.up:hover {
    background: #2a5a2a;
    box-shadow: 0 0 10px rgba(0, 255, 0, 0.3);
}

.rod-btn.down {
    background: #3a1a1a;
    border-color: #aa0000;
    color: #ff4444;
}

.rod-btn.down:hover {
    background: #5a2a2a;
    box-shadow: 0 0 10px rgba(255, 0, 0, 0.3);
}

.rod-btn:active {
    transform: scale(0.95);
}

.rod-position {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    background: #1a1a1a;
    border: 1px solid #333;
    border-radius: 5px;
    font-size: 0.8rem;
}

.rod-position span:last-child {
    font-size: 1.5rem;
    font-weight: bold;
    color: #00ffff;
}

.gauges-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.gauge {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.gauge label {
    font-size: 0.8rem;
    color: #888;
    letter-spacing: 1px;
}

.gauge-bar {
    height: 40px;
    background: #1a1a1a;
    border: 1px solid #333;
    border-radius: 3px;
    overflow: hidden;
}

.gauge-fill {
    height: 100%;
    width: 25%;
    transition: width 0.1s, background 0.3s;
}

.gauge-fill.power {
    background: linear-gradient(90deg, #004400, #00ff00);
}

.gauge-fill.temp {
    background: linear-gradient(90deg, #0066ff, #00ffff);
}

.gauge-fill.temp.warning {
    background: linear-gradient(90deg, #ff8800, #ffaa00);
}

.gauge-fill.temp.danger {
    background: linear-gradient(90deg, #ff0000, #ff4444);
}

.gauge-bar.velocity-bar {
    position: relative;
}

.gauge-center-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #666;
    transform: translateX(-50%);
    z-index: 1;
}

.gauge-fill.velocity {
    position: absolute;
    top: 0;
    height: 100%;
    transition: width 0.1s, left 0.1s, background 0.3s;
}

.gauge-fill.velocity.positive {
    background: linear-gradient(90deg, #00aa00, #00ff00);
}

.gauge-fill.velocity.negative {
    background: linear-gradient(90deg, #ff4444, #aa0000);
}

.gauge-value {
    font-size: 1.5rem;
    font-weight: bold;
    text-align: right;
}

.status-display {
    padding: 25px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: bold;
    background: #0a1a0a;
    border: 2px solid #00aa00;
    border-radius: 5px;
    color: #00ff00;
    letter-spacing: 2px;
}

.status-display.warning {
    background: #1a1a0a;
    border-color: #aaaa00;
    color: #ffff00;
    animation: pulse 1s infinite;
}

.status-display.danger {
    background: #1a0a0a;
    border-color: #aa0000;
    color: #ff0000;
    animation: pulse 0.5s infinite;
}

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

.scores {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

.score-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    background: #1a1a1a;
    border: 1px solid #333;
    border-radius: 5px;
}

.score-item span:first-child {
    font-size: 0.7rem;
    color: #666;
}

.score-item span:last-child {
    font-size: 1.8rem;
    font-weight: bold;
    color: #ffff00;
}

.az5-btn {
    width: 100%;
    padding: 30px;
    font-family: 'Courier New', monospace;
    font-size: 2rem;
    font-weight: bold;
    background: linear-gradient(180deg, #aa0000 0%, #660000 100%);
    border: 3px solid #ff0000;
    border-radius: 10px;
    color: white;
    cursor: pointer;
    text-shadow: 0 0 10px #ff0000;
    box-shadow: 0 0 20px rgba(255, 0, 0, 0.3);
    transition: all 0.1s;
    margin-top: auto;
}

.az5-btn:hover {
    background: linear-gradient(180deg, #cc0000 0%, #880000 100%);
    box-shadow: 0 0 30px rgba(255, 0, 0, 0.5);
}

.az5-btn:active {
    transform: scale(0.95);
}

.az5-btn small {
    font-size: 0.7rem;
    opacity: 0.8;
}

.instructions {
    margin-top: 20px;
    padding: 15px;
    background: #111;
    border: 1px solid #333;
    border-radius: 5px;
    font-size: 0.85rem;
    color: #888;
    text-align: center;
}

.instructions p {
    margin: 5px 0;
}

.game-over-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

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

.game-over-modal {
    background: #111;
    border: 3px solid #333;
    border-radius: 15px;
    padding: 40px;
    text-align: center;
    max-width: 500px;
}

.game-over-modal h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.game-over-modal h2.success {
    color: #00ff00;
    text-shadow: 0 0 20px #00ff00;
}

.game-over-modal h2.failure {
    color: #ff0000;
    text-shadow: 0 0 20px #ff0000;
}

.game-over-modal p {
    font-size: 1.2rem;
    margin: 10px 0;
    color: #aaa;
}

#finalScore {
    font-size: 2rem;
    color: #ffff00;
    font-weight: bold;
}

#restartBtn {
    margin-top: 30px;
    padding: 15px 40px;
    font-family: 'Courier New', monospace;
    font-size: 1.2rem;
    font-weight: bold;
    background: #1a3a1a;
    border: 2px solid #00aa00;
    border-radius: 5px;
    color: #00ff00;
    cursor: pointer;
    transition: all 0.2s;
}

#restartBtn:hover {
    background: #2a5a2a;
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.3);
}