body {
    margin: 0;
    padding: 20px;
    background: linear-gradient(135deg, #1a5276 0%, #2e86ab 50%, #a3d9a5 100%);
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.game-container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    text-align: center;
    position: relative;
}

.game-info {
    display: flex;
    justify-content: space-around;
    margin-bottom: 15px;
    font-size: 18px;
    font-weight: bold;
    color: #2c3e50;
}

.score, .round, .arrows {
    background: #f8f9fa;
    padding: 8px 15px;
    border-radius: 20px;
    border: 2px solid #2e86ab;
}

#gameCanvas {
    border: 3px solid #34495e;
    border-radius: 10px;
    background: linear-gradient(to bottom, #87CEEB 0%, #b8d4e8 40%, #90EE90 60%, #228B22 100%);
    display: block;
    margin: 0 auto;
    cursor: crosshair;
}

.power-bar-container {
    width: 300px;
    height: 25px;
    background: #e0e0e0;
    border-radius: 12px;
    margin: 15px auto;
    position: relative;
    overflow: hidden;
    border: 2px solid #34495e;
}

.power-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #27ae60, #f1c40f, #e74c3c);
    border-radius: 10px;
    transition: width 0.05s;
}

.power-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: bold;
    color: #333;
    text-shadow: 1px 1px 2px rgba(255,255,255,0.8);
}

.game-over, .start-screen, .round-screen {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(255, 255, 255, 0.98);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    text-align: center;
    z-index: 100;
}

.hidden {
    display: none !important;
}

.game-over h2 {
    color: #e74c3c;
    margin-bottom: 20px;
    font-size: 32px;
}

.start-screen h2 {
    color: #2e86ab;
    margin-bottom: 20px;
    font-size: 32px;
}

.round-screen h2 {
    color: #27ae60;
    margin-bottom: 20px;
    font-size: 32px;
}

.instruction {
    color: #7f8c8d;
    font-size: 14px;
    margin: 5px 0;
}

button {
    background: linear-gradient(135deg, #2e86ab, #1a5276);
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 18px;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s;
    margin: 10px;
}

button:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.start-screen button {
    background: linear-gradient(135deg, #27ae60, #1e8449);
}

.controls {
    margin-top: 15px;
    color: #7f8c8d;
    font-size: 14px;
}

/* Score popup animation */
@keyframes scorePopup {
    0% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -100%) scale(1.5);
    }
}

.score-popup {
    position: absolute;
    font-size: 48px;
    font-weight: bold;
    color: #f1c40f;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    animation: scorePopup 1s ease-out forwards;
    pointer-events: none;
}