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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(to bottom, #87CEEB, #E0F6FF);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

#gameContainer {
    position: relative;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    overflow: hidden;
}

#gameCanvas {
    display: block;
    background: #5C94FC;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

#hud {
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    display: flex;
    justify-content: space-between;
    color: white;
    font-size: 18px;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    pointer-events: none;
    z-index: 10;
}

#hud > div {
    background: rgba(0, 0, 0, 0.3);
    padding: 8px 16px;
    border-radius: 4px;
}

#soundToggle {
    background: rgba(0, 0, 0, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    font-size: 20px;
    padding: 4px 12px;
    border-radius: 4px;
    cursor: pointer;
    pointer-events: all;
    transition: all 0.3s ease;
}

#soundToggle:hover {
    background: rgba(0, 0, 0, 0.5);
    border-color: rgba(255, 255, 255, 0.6);
    transform: scale(1.1);
}

.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    z-index: 100;
}

.screen.hidden {
    display: none;
}

.screen h1 {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.7);
    color: #FFD700;
}

.screen p {
    font-size: 20px;
    margin: 10px 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
}

.screen button {
    margin-top: 30px;
    padding: 15px 40px;
    font-size: 24px;
    font-weight: bold;
    color: white;
    background: linear-gradient(to bottom, #4CAF50, #45a049);
    border: 3px solid #2e7d32;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.screen button:hover {
    background: linear-gradient(to bottom, #5fbf63, #4CAF50);
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.screen button:active {
    transform: scale(0.98);
}

#menuScreen {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

#gameOverScreen {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

#levelCompleteScreen {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

/* Mobile touch controls */
.mobile-controls {
    position: absolute;
    bottom: 30px;
    left: 0;
    right: 0;
    display: none;
    justify-content: space-between;
    align-items: flex-end;
    padding: 0 30px;
    z-index: 50;
    pointer-events: none;
}

.mobile-controls > div {
    pointer-events: all;
}

.control-left {
    display: flex;
    gap: 20px;
    align-items: center;
}

.control-right {
    display: flex;
    align-items: center;
}

.control-btn {
    width: 80px;
    height: 80px;
    font-size: 28px;
    font-weight: bold;
    background: rgba(0, 0, 0, 0.6);
    border: 4px solid rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    color: white;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    transition: all 0.1s ease;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn:active {
    background: rgba(255, 255, 255, 0.9);
    color: #333;
    transform: scale(0.9);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.4);
}

.jump-btn {
    width: 100px;
    height: 100px;
    font-size: 18px;
    font-weight: 900;
    background: rgba(76, 175, 80, 0.9);
    border-color: rgba(255, 255, 255, 0.9);
    border-width: 5px;
}

.jump-btn:active {
    background: rgba(139, 195, 74, 1);
    color: white;
}

/* Show mobile controls on touch devices and small screens */
@media (hover: none) and (pointer: coarse), (max-width: 768px) {
    .mobile-controls {
        display: flex;
    }
}

/* Responsive canvas for mobile */
@media (max-width: 768px) {
    body {
        align-items: flex-start;
        padding: 0;
        overflow: hidden;
    }

    #gameContainer {
        width: 100vw;
        height: 100vh;
        position: relative;
        display: flex;
        flex-direction: column;
    }

    #gameCanvas {
        width: 100%;
        height: 60vh;
        max-height: 60vh;
        flex-shrink: 0;
    }

    #hud {
        top: 10px;
        font-size: 14px;
    }

    #hud > div {
        padding: 6px 12px;
    }

    #soundToggle {
        font-size: 18px;
        padding: 4px 10px;
    }

    .screen h1 {
        font-size: 32px;
        margin-bottom: 15px;
    }

    .screen p {
        font-size: 14px;
        margin: 8px 0;
    }

    .screen button {
        font-size: 18px;
        padding: 10px 25px;
        margin-top: 20px;
    }
}