#container {
    margin: 0;
    padding: 0;
    background-color: #1a1a1a;
    color: #ffffff;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}
.viewer-container {
    position: relative;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: grab;
    max-width: 100vw;
    max-height: 100vh;
}

.viewer-container:active {
    cursor: grabbing;
}

.image-wrapper {
    position: relative;
    transform-origin: center center;
    will-change: transform;
}

img {
    display: block;
    max-width: 90vw;
    max-height: 90vh;
    user-select: none;
    pointer-events: none;
}

.zoom-controls {
    position: absolute;
    top: 15px;
    right: 15px;
    display: flex;
    gap: 6px;
    background: rgba(0, 0, 0, 0.6);
    padding: 6px;
    border-radius: 8px;
    backdrop-filter: blur(4px);
    z-index: 10;
}

.zoom-btn {
    background: transparent;
    border: none;
    color: #ffffff;
    width: 32px;
    height: 32px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: background 0.2s;
}

.zoom-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.2);
}

.zoom-btn:disabled {
    color: #666666;
    cursor: not-allowed;
    background: transparent;
}