body {
    margin: 0;
    padding: 20px;
    font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #27c76a 0%, #36d44e 25%, #93c738 50%, #57f5f2 75%, #1d74ff 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #0f172a;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.game-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 32px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    max-width: 1280px;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.game-container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 3s ease-in-out infinite;
    pointer-events: none;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    50% { transform: translateX(100%) translateY(100%) rotate(45deg); }
    100% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
}

.game-header {
    text-align: center;
    margin-bottom: 32px;
}

.game-header h1 {
    background: linear-gradient(135deg, #66e8ea, #6bd863, #93fb9f);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 0 16px 0;
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    animation: titleGlow 2s ease-in-out infinite alternate;
}

@keyframes titleGlow {
    0% { filter: drop-shadow(0 0 5px rgba(102, 126, 234, 0.3)); }
    100% { filter: drop-shadow(0 0 15px rgba(118, 75, 162, 0.5)); }
}

.game-info {
    display: flex;
    justify-content: space-around;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.8), rgba(249, 250, 251, 0.9));
    padding: 20px;
    border-radius: 16px;
    font-weight: 600;
    color: #374151;
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    position: relative;
}

.game-info > div {
    position: relative;
    padding: 8px 16px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.6);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.game-info > div:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    background: rgba(255, 255, 255, 0.8);
}

#gameCanvas {
    border: 3px solid transparent;
    border-radius: 16px;
    background: linear-gradient(135deg, #87CEEB, #98D8E8, #B0E0E6);
    background-clip: padding-box;
    display: block;
    margin: 0 auto;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.3),
        inset 0 0 20px rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    position: relative;
}

#gameCanvas::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    background: linear-gradient(135deg, #667eea, #764ba2, #f093fb, #f5576c, #4facfe);
    border-radius: 16px;
    z-index: -1;
    animation: borderGlow 3s ease-in-out infinite;
}

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

#gameCanvas:hover {
    transform: translateY(-5px);
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.2),
        0 0 0 1px rgba(255, 255, 255, 0.4),
        inset 0 0 30px rgba(255, 255, 255, 0.3);
}

.game-controls {
    margin-top: 32px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 32px;
}

.instructions {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(249, 250, 251, 0.8));
    padding: 24px;
    border-radius: 16px;
    flex: 1;
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.instructions:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(249, 250, 251, 0.9));
}

.instructions h3 {
    margin: 0 0 16px 0;
    color: #111827;
    font-size: 1.125rem;
    font-weight: 600;
}

.instructions p {
    margin: 8px 0;
    color: #4b5563;
    font-weight: 500;
    line-height: 1.5;
}

.control-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-width: 140px;
}

.control-buttons button {
    padding: 14px 28px;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid transparent;
    border-radius: 12px;
    background: linear-gradient(135deg, #47d5da, #1a9e2b);
    color: #ffffff;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
}

.control-buttons button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.control-buttons button:hover::before {
    left: 100%;
}

.control-buttons button:hover {
    background: linear-gradient(135deg, #75ecf7, #befb93);
    box-shadow: 0 8px 25px rgba(118, 75, 162, 0.4);
    transform: translateY(-2px);
}

.control-buttons button:active {
    background: linear-gradient(135deg, #5ab2d8, #66ea90);
    transform: translateY(0);
}

.control-buttons button:disabled {
    background: linear-gradient(135deg, #9ca3af, #d1d5db);
    cursor: not-allowed;
    opacity: 0.6;
    transform: none;
    box-shadow: 0 2px 8px rgba(156, 163, 175, 0.2);
}

/* Responsive design */
@media (max-width: 1280px) {
    body {
        padding: 16px;
    }
    
    .game-container {
        padding: 24px;
    }
    
    #gameCanvas {
        width: 100%;
        max-width: 1200px;
        height: auto;
    }
    
    .game-controls {
        flex-direction: column;
        gap: 24px;
        align-items: stretch;
    }
    
    .control-buttons {
        flex-direction: row;
        justify-content: center;
        min-width: auto;
    }
}

@media (max-width: 768px) {
    .game-header h1 {
        font-size: 1.875rem;
    }
    
    .game-container {
        padding: 16px;
    }
    
    .instructions {
        padding: 16px;
    }
    
    .control-buttons button {
        padding: 10px 20px;
        font-size: 13px;
    }
}