/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Comic Sans MS', cursive, sans-serif;
    overflow: hidden;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4, #feca57);
    background-size: 400% 400%;
    animation: gradientShift 8s ease infinite;
}

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

/* Start Overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.start-content {
    text-align: center;
    color: white;
    padding: 2rem;
    border-radius: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.start-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.start-content p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.start-button, .fullscreen-button {
    font-size: 1.5rem;
    padding: 1rem 2rem;
    margin: 0.5rem;
    border: none;
    border-radius: 50px;
    background: linear-gradient(45deg, #ff6b6b, #feca57);
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.start-button:hover, .fullscreen-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

/* Game Container */
.game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

/* Score Display */
.score-display {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    padding: 1rem 2rem;
    border-radius: 50px;
    font-size: 2rem;
    font-weight: bold;
    color: #333;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    animation: pulse 2s ease-in-out infinite;
}

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

/* Canvas */
.game-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* Exit Fullscreen Button */
.exit-fullscreen-button {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 100;
    font-size: 1rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 25px;
    background: rgba(255, 255, 255, 0.9);
    color: #333;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

.exit-fullscreen-button:hover {
    background: rgba(255, 255, 255, 1);
    transform: translateY(-2px);
}

/* Fullscreen styles */
.game-container:fullscreen {
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4, #feca57);
    background-size: 400% 400%;
    animation: gradientShift 8s ease infinite;
}

.game-container:-webkit-full-screen {
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4, #feca57);
    background-size: 400% 400%;
    animation: gradientShift 8s ease infinite;
}

.game-container:-moz-full-screen {
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4, #feca57);
    background-size: 400% 400%;
    animation: gradientShift 8s ease infinite;
}

/* Responsive design */
@media (max-width: 768px) {
    .start-content h1 {
        font-size: 2rem;
    }
    
    .start-content p {
        font-size: 1.2rem;
    }
    
    .start-button, .fullscreen-button {
        font-size: 1.2rem;
        padding: 0.8rem 1.5rem;
    }
    
    .score-display {
        font-size: 1.5rem;
        padding: 0.8rem 1.5rem;
    }
}