body {
    margin: 0;
    overflow: hidden; /* Prevent scrollbars from appearing during animation */
    display: flex;
    justify-content: center;
    align-items: flex-end; /* Align button to the bottom */
    min-height: 100vh; /* Full viewport height */
    font-family: Arial, sans-serif;
    background-color: #333;
}

.launch-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-end;
}

/* Backgrounds - NO CHANGE HERE */
.background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transition: opacity 2s ease-in-out; /* Smooth transition for background swap */
}

.ground {
    background: linear-gradient(to top, #6b4e3e 0%, #a07d6d 50%, #90a8a8 100%); /* Earthy ground with a hint of sky */
    z-index: 1; /* Keep ground above sky initially */
}

.sky {
    background: linear-gradient(to top, #87CEEB 0%, #0077be 50%, #000033 100%); /* Blue sky fading to dark space */
    z-index: 0; /* Sky initially behind ground */
    opacity: 0; /* Initially invisible */
}

.sky.active {
    opacity: 1; /* Make sky visible */
    z-index: 2; /* Bring sky to front */
}

.ground.hidden {
    opacity: 0; /* Hide ground */
    z-index: 0; /* Send ground to back */
}

/* NEW: Launchpad Styling */
.launchpad {
    position: absolute;
    bottom: 0; /* Position at the very bottom */
    width: 100%; /* Take full width */
    height: 70%; /* Adjust height to fit the launchpad image */
    background: url('launchpad2.jpg') no-repeat center bottom; /* Use your launchpad image */
    background-size: contain; /* Ensure the image fits within the bounds */
    z-index: 2; /* Above ground, below rocket */
    transition: opacity 2s ease-in-out; /* For disappearing */
}

.launchpad.hidden {
    opacity: 0; /* Hide launchpad */
    z-index: 0; /* Send to back */
}


/* Rocket Styling - MODIFIED */
.rocket-wrapper {
    position: absolute;
    bottom: 50px; /* Adjust this value so the rocket sits on the launchpad */
    transform: translateY(0); /* Initial position */
    transition: transform 5s ease-in-out; /* Smooth rocket ascent */
    z-index: 3;
}

.rocket-wrapper.launched {
    transform: translateY(-120vh); /* Move rocket way up */
}

#rocket {
    width: 90px; /* REDUCED SIZE for the rocket to fit the launchpad */
    height: auto;
    display: block;
}

/* Flame Effect - NO CHANGE HERE */
.flame {
    position: absolute;
    bottom: -30px; /* Position below the rocket */
    left: 50%;
    transform: translateX(-50%) scaleY(0); /* Start small and invisible */
    width: 40px; /* Adjusted flame width for smaller rocket */
    height: 80px; /* Max height of the flame */
    background: linear-gradient(to bottom, orange 0%, red 50%, yellow 100%);
    border-radius: 50% 50% 30% 30%; /* Flame shape */
    box-shadow: 0 0 20px 5px orange, 0 0 40px 10px red;
    transition: all 0.3s ease-out; /* Smooth growth */
    opacity: 0;
    z-index: 2;
}

.flame.active {
    transform: translateX(-50%) scaleY(1); /* Grow to full size */
    opacity: 1;
    animation: pulseFlame 0.5s infinite alternate; /* Pulsing effect */
}

.flame.hidden {
    display: none; /* Fully hide when not active */
}

@keyframes pulseFlame {
    from {
        transform: translateX(-50%) scaleY(1) scaleX(1);
    }
    to {
        transform: translateX(-50%) scaleY(1.1) scaleX(0.9);
    }
}


/* Button Styling - NO CHANGE HERE */
#launchButton {
    position: absolute;
    bottom: 20px;
    padding: 15px 30px;
    font-size: 1.2em;
    cursor: pointer;
    background-color: #4CAF50; /* Green */
    color: white;
    border: none;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    transition: background-color 0.3s ease, transform 0.1s ease;
    z-index: 4; /* Keep button on top */
}

#launchButton:hover {
    background-color: #45a049;
}

#launchButton:active {
    transform: translateY(2px);
    box-shadow: 0 2px 3px rgba(0,0,0,0.3);
}

#launchButton:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

/* Helper class to hide elements */
.hidden {
    /* Changed from display: none to opacity: 0 and z-index to allow transition for backgrounds/launchpad */
    opacity: 0;
    z-index: 0;
    pointer-events: none; /* Make it unclickable */
}

/* Re-add specific display:none for flame when it's totally off */
.flame.hidden {
    display: none;
}
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7); /* Semi-transparent black */
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100; /* Make sure it's on top of everything */
}

.modal-content {
    background-color: white;
    padding: 20px 40px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.modal-content h2 {
    color: #333;
}

.modal-content p {
    color: #666;
    margin-bottom: 25px;
}

.modal-content button {
    padding: 12px 25px;
    font-size: 16px;
    background-color: #4CAF50; /* Green */
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}