html,
body {
    width: 100vw;
    height: 100vh;
    margin: 0;
    padding: 0;
    overflow: hidden;
    touch-action: none;
}

body {
    background: #111;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

#hearts {
    position: absolute;
    left: 50%;
    top: 12px;
    transform: translateX(-50%);
    font-size: 2.2rem;
    letter-spacing: 8px;
    z-index: 2;
    user-select: none;
    pointer-events: none;
}

#popup {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.85);
    color: #fff;
    padding: 36px 48px;
    border-radius: 16px;
    font-size: 2.2rem;
    text-align: center;
    z-index: 10;
    box-shadow: 0 0 24px #0ff;
}

#popup button {
    margin-top: 24px;
    font-size: 1.2rem;
    padding: 8px 24px;
    border-radius: 8px;
    border: none;
    background: #0ff;
    color: #111;
    cursor: pointer;
}

#game-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px #0f0, 0 0 40px #0ff;
    border-radius: 10px;
    overflow: hidden;
    background: #222;
    max-width: 100vw;
    max-height: 90vh;
    padding-top: 48px;
}

#game-canvas {
    display: block;
    background: #222;
    border-radius: 10px;
    outline: none;
    max-width: 100vw;
    max-height: 90vh;
    width: auto;
    height: auto;
}