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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

#gameContainer {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    padding: 20px;
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

#gameHeader {
    text-align: center;
    width: 100%;
}

#gameHeader h1 {
    color: #fff;
    font-size: 2.5em;
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.5),
                 0 4px 8px rgba(0, 0, 0, 0.5);
    margin-bottom: 15px;
    letter-spacing: 2px;
}

#gameStatus {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
    flex-wrap: wrap;
}

.status-panel {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 15px 25px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    min-width: 200px;
}

.panel-label {
    color: #fff;
    font-size: 0.9em;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.8;
}

.health-bar {
    width: 100%;
    height: 12px;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 8px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

.health-fill {
    height: 100%;
    transition: width 0.3s ease-out;
    border-radius: 6px;
    position: relative;
    overflow: hidden;
}

.health-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.3) 50%,
        transparent 100%);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.player-health {
    background: linear-gradient(90deg, #00ff88, #00cc6a);
    box-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.ai-health {
    background: linear-gradient(90deg, #ff4757, #ff3344);
    box-shadow: 0 0 10px rgba(255, 71, 87, 0.5);
}

.score {
    color: #fff;
    font-size: 1.1em;
    font-weight: bold;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.vs-panel {
    display: flex;
    align-items: center;
    justify-content: center;
}

.vs-text {
    font-size: 2em;
    font-weight: bold;
    background: linear-gradient(135deg, #ffd700, #ffaa00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
    filter: drop-shadow(0 0 10px rgba(255, 215, 0, 0.5));
}

#canvasContainer {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5),
                inset 0 0 100px rgba(255, 255, 255, 0.05);
    border: 3px solid rgba(255, 255, 255, 0.1);
}

#gameCanvas {
    display: block;
    background: #1a1a1a;
    cursor: crosshair;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    transition: opacity 0.3s ease;
}

.overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.overlay-content {
    text-align: center;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.game-title {
    font-size: 3.5em;
    color: #ffd700;
    text-shadow: 0 0 30px rgba(255, 215, 0, 0.5),
                 0 4px 8px rgba(0, 0, 0, 0.5);
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.3em;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 30px;
    letter-spacing: 3px;
}

.controls-info {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.control-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.key {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 45px;
    height: 45px;
    background: linear-gradient(145deg, #2a2a3a, #1a1a2a);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: #fff;
    font-weight: bold;
    font-size: 0.9em;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3),
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.control-desc {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1em;
    min-width: 100px;
    text-align: left;
}

.start-btn {
    padding: 18px 50px;
    font-size: 1.3em;
    font-weight: bold;
    color: #fff;
    background: linear-gradient(135deg, #ffd700, #ffaa00);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(255, 215, 0, 0.3);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.start-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(255, 215, 0, 0.4);
}

.start-btn:active {
    transform: translateY(-1px);
}

.difficulty-selector {
    margin-top: 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.difficulty-selector span {
    color: rgba(255, 255, 255, 0.8);
    margin-right: 5px;
}

.diff-btn {
    padding: 10px 20px;
    font-size: 0.9em;
    color: rgba(255, 255, 255, 0.7);
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.diff-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.diff-btn.active {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-color: #667eea;
    color: #fff;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.winner-title {
    font-size: 3em;
    margin-bottom: 20px;
    animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.winner-title.victory {
    color: #00ff88;
    text-shadow: 0 0 30px rgba(0, 255, 136, 0.5);
}

.winner-title.defeat {
    color: #ff4757;
    text-shadow: 0 0 30px rgba(255, 71, 87, 0.5);
}

.final-score {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.3em;
    margin-bottom: 30px;
}

#gameInfo {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
    justify-content: center;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.05);
    padding: 10px 20px;
    border-radius: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.info-icon {
    font-size: 1.2em;
}

.info-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9em;
}

@media (max-width: 900px) {
    #gameHeader h1 {
        font-size: 1.8em;
    }

    .status-panel {
        min-width: 150px;
        padding: 10px 15px;
    }

    .game-title {
        font-size: 2em;
    }

    .controls-info {
        padding: 15px;
    }
}