body {
    margin: 0;
    padding: 0;
    background-color: #000;
    color: #f1f3f5;
    font-family: Arial, sans-serif;
    overflow: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    pointer-events: auto; /* Ensure clicks are enabled */
}

#container {
    text-align: center;
    z-index: 10;
    position: relative;
    pointer-events: none; /* Allow clicks to pass through to body */
}

#container * {
    pointer-events: auto; /* Re-enable for interactive elements like button */
}

h1 {
    font-size: 2rem;
    margin-bottom: 10px;
    transition: opacity 1s ease-out;
}

p {
    font-size: 1rem;
    margin-bottom: 20px;
    transition: opacity 1s ease-out;
}

.bubble {
    position: absolute;
    border-radius: 50%;
    box-shadow: 0 10px 26px rgba(0,0,0,0.38), inset -8px -6px 20px rgba(255,255,255,0.06);
    opacity: 0.98;
    pointer-events: auto;
    transform-origin: center;
    animation: float 3s ease-out forwards;
    will-change: transform, opacity, left, top;
    background-repeat: no-repeat;
    background-size: cover;
}

.bubble:hover {
    opacity: 1;
    cursor: pointer;
}

@keyframes float {
    0% { transform: translateY(0); opacity: 0.8; }
    100% { transform: translateY(-100vh); opacity: 0; }
}

@media (max-width: 768px) {
    h1 { font-size: 1.5rem; }
    p { font-size: 0.9rem; }
}

#instructions {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: rgba(255, 255, 255, 0.5);
    font-family: sans-serif;
    font-size: 2em;
    text-align: center;
    pointer-events: none;
    transition: opacity 1s;
}

.back-link {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 9999; /* ensure it's above the canvas */
    pointer-events: auto; /* ensure it receives taps */
    background-color: var(--button-bg);
    color: var(--button-text);
    padding: 10px 15px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 1em;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.3s, box-shadow 0.3s;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

@media (hover: hover) {
    .back-link:hover {
        background-color: var(--button-hover-bg);
        box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    }
}

.back-link:active {
    background-color: var(--button-active-bg);
    transform: translateY(1px);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

canvas {
    display: block;
}