.fullscreen-button-container {
    position: fixed;
    bottom: 10px;
    right: 10px;
    z-index: 100000;
    pointer-events: auto;
}

.fullscreen-btn {
    width: 4em;
    height: 4em;
    background: rgba(0, 0, 0, 0.5);
    border: 2px solid rgba(0, 0, 0, 0.2);
    border-radius: 50%;
    color: #000;
    cursor: pointer;
    padding: 12px;
    transition: all 0.1s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3),
                inset 0 0 20px rgba(255, 255, 255, 0.08);
    -webkit-tap-highlight-color: transparent;
    transition: background 150ms, border-color 150ms, box-shadow 150ms, scale 150ms;
}

.fullscreen-btn:hover {
    background: rgba(0, 0, 0, 0.7);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.7);
    
}

.fullscreen-btn:active,
.fullscreen-btn.pressed {
    background: rgba(0, 0, 0, 0.3);
    scale: 0.95;
    border-color: rgba(0, 0, 0, 0.5);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5),
                inset 0 0 25px rgba(0, 0, 0, 0.4);
}

.fullscreen-btn:active {
    transform: scale(0.95);
    box-shadow: 0 2px 8px rgba(255, 255, 255, 0.4);
}

.fullscreen-btn svg {
    fill: rgba(240, 179, 83);
    transition: transform 0.2s ease;
    scale: 1.3;
}

.fullscreen-canvas {
    width: 100vw !important;
    height: 100vh !important;
    object-fit: contain;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    z-index: 9999;
}

.fullscreen-mode .body-title {
    display: none !important;
}

:fullscreen .fullscreen-button-container,
:-webkit-full-screen .fullscreen-button-container,
:-moz-full-screen .fullscreen-button-container,
:-ms-fullscreen .fullscreen-button-container {
    bottom: 10px;
    right: 10px;
}