body {
    margin: 0;
    overflow: hidden;
    background-color: #f0f0f0;
    font-family: Arial, sans-serif;
    touch-action: none; /* Prevents default touch actions like scrolling */
    overscroll-behavior: none; /* Prevent rubber-banding on mobile */
}
#gameCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh; /* Use dynamic viewport height on modern mobile browsers */
}
#dateDisplay, #scoreDisplay {
    position: absolute;
    padding: 5px 10px;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    border-radius: 5px;
    font-size: 16px;
    z-index: 1;
}
#dateDisplay {
    top: 10px;
    left: 10px;
}
#scoreDisplay {
    top: 10px;
    right: 10px;
}
#resetBtn, #pauseBtn, #startCampaignBtn {
    position: absolute;
    padding: 3px 6px;
    font-size: 12px;
    cursor: pointer;
    z-index: 1;
}
#resetBtn { bottom: 10px; left: 10px; }
#pauseBtn { bottom: 10px; left: 70px; }
#startCampaignBtn { bottom: 10px; left: 130px; }
#flagsMenu, #citiesMenu, #interceptedMenu {
    position: absolute;
    top: 40px;
    z-index: 2;
    background-color: rgba(255, 255, 255, 0.6);
    color: black;
    padding: 10px;
    border-radius: 5px;
    font-size: 14px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    pointer-events: none; /* allow touch input to pass through on mobile */
}
#flagsMenu {
    left: 10px;
    top: 10px; /* Position inside the Canadian flag area */
    width: 200px;
    background-color: rgba(240, 240, 255, 0.7); /* Slight blue tint */
}
#citiesMenu {
    right: 10px;
    top: auto; /* Remove top position */
    bottom: 50px; /* Position inside Mexican flag area */
    width: 200px;
    background-color: rgba(240, 255, 240, 0.7); /* Slight green tint */
}
#interceptedMenu {
    right: auto; /* Remove right alignment */
    left: 10px; /* Position on left side */
    top: auto; /* Remove top position */
    bottom: 50px; /* Position inside Mexican flag area */
    width: 200px;
    background-color: rgba(255, 240, 240, 0.7); /* Slight red tint */
}
#flagsMenu h3, #citiesMenu h3, #interceptedMenu h3 {
    margin: 0 0 10px 0;
    font-size: 16px;
    color: black;
    text-align: center;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    padding-bottom: 4px;
}
#flagsMenu div, #citiesMenu div, #interceptedMenu div {
    margin-bottom: 5px;
}
#flagsMenu img, #interceptedMenu img {
    vertical-align: middle;
    margin-right: 5px;
}
/* Mobile adjustments */
@media (max-width: 600px) {
    #dateDisplay, #scoreDisplay {
        font-size: 12px;
        padding: 4px 6px;
    }
    
    /* Position menus inside flag areas on mobile */
    #flagsMenu {
        left: 5px;
        top: 5px; /* Inside Canadian flag area */
    }
    
    #interceptedMenu {
        left: 50%;
        transform: translateX(-50%);
        top: auto; /* Remove top position */
        bottom: 50px; /* Inside Mexican flag area */
    }
    
    #citiesMenu {
        right: 5px;
        top: auto; /* Remove top position */
        bottom: 50px; /* Inside Mexican flag area */
    }
    
    /* Improved button styling on mobile */
    #resetBtn, #pauseBtn, #startCampaignBtn {
        font-size: 14px;
        padding: 8px 10px;
        border-radius: 4px;
        border: none;
        background-color: rgba(0, 0, 0, 0.7);
        color: white;
        margin-right: 5px;
        z-index: 10; /* Ensure buttons are above other elements */
    }
    
    #resetBtn { bottom: 15px; left: 10px; }
    #pauseBtn { bottom: 15px; left: 80px; }
    #startCampaignBtn { 
        bottom: 15px; 
        left: 150px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 150px;
    }
    
    /* Mobile menu layout */
    #flagsMenu,
    #interceptedMenu,
    #citiesMenu {
        width: 30%;
        max-width: 120px;
        min-width: 90px;
        font-size: 10px;
        padding: 5px;
        border: 1px solid rgba(0, 0, 0, 0.2);
    }
    
    #flagsMenu h3, 
    #citiesMenu h3, 
    #interceptedMenu h3 {
        font-size: 11px;
        margin-bottom: 5px;
        font-weight: bold;
        text-align: center;
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        padding-bottom: 3px;
    }
    
    #flagsMenu img, 
    #interceptedMenu img {
        width: 15px;
        height: 10px;
    }
    
    #flagsMenu div, 
    #citiesMenu div, 
    #interceptedMenu div {
        padding: 3px 0;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        border-bottom: 1px dotted rgba(0, 0, 0, 0.1);
    }
} 

/* Extra small devices */
@media (max-width: 375px) {
    #resetBtn, #pauseBtn, #startCampaignBtn {
        padding: 6px 8px;
        font-size: 12px;
    }
    
    #resetBtn { bottom: 10px; left: 5px; }
    #pauseBtn { bottom: 10px; left: 60px; }
    #startCampaignBtn { bottom: 10px; left: 120px; max-width: 120px; }
    
    #flagsMenu,
    #citiesMenu,
    #interceptedMenu {
        width: 30%;
        min-width: 80px;
        padding: 3px;
        font-size: 9px;
    }
    
    #flagsMenu { left: 2px; }
    #citiesMenu { right: 2px; }
    
    #flagsMenu div, 
    #citiesMenu div, 
    #interceptedMenu div {
        font-size: 9px;
    }
    
    #flagsMenu h3, 
    #citiesMenu h3, 
    #interceptedMenu h3 {
        font-size: 10px;
        padding-bottom: 2px;
        margin-bottom: 3px;
    }
} 

/* Super small devices */
@media (max-width: 320px) {
    #resetBtn, #pauseBtn, #startCampaignBtn {
        padding: 4px 6px;
        font-size: 10px;
    }
    
    #resetBtn { bottom: 5px; left: 3px; }
    #pauseBtn { bottom: 5px; left: 45px; }
    #startCampaignBtn { bottom: 5px; left: 95px; max-width: 100px; }
    
    #flagsMenu,
    #citiesMenu,
    #interceptedMenu {
        width: 30%;
        min-width: 70px;
        max-width: 90px;
        padding: 2px;
        font-size: 8px;
    }
    
    #flagsMenu h3, 
    #citiesMenu h3, 
    #interceptedMenu h3 {
        font-size: 9px;
        padding-bottom: 1px;
        margin-bottom: 2px;
    }
    
    #flagsMenu img, 
    #interceptedMenu img {
        width: 12px;
        height: 8px;
    }
    
    #flagsMenu div, 
    #citiesMenu div, 
    #interceptedMenu div {
        font-size: 7px;
        line-height: 1.2;
        padding: 2px 0;
    }
}