/* ========================================
   Image Viewer - 图片查看器
   ======================================== */

.image-viewer {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: var(--z-modal);
    opacity: 0;
}

.image-viewer.active {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 1;
}

/* ===== 工具栏 ===== */
.viewer-toolbar {
    position: fixed;
    top: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.5);
    padding: 10px;
    border-radius: var(--radius-md);
    display: flex;
    gap: 10px;
    align-items: center;
    opacity: 0;
}

.image-viewer.active .viewer-toolbar {
    opacity: 1;
}

/* ===== 按钮 ===== */
.zoom-button,
.close-button {
    background: none;
    border: none;
    color: var(--color-text);
    font-size: var(--font-xl);
    cursor: pointer;
    padding: 5px 10px;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.zoom-button:hover,
.close-button:hover {
    background-color: var(--bg-hover-light);
}

#scaleText {
    color: var(--color-text);
    font-size: var(--font-md);
    min-width: 50px;
    text-align: center;
}

/* ===== 图片 ===== */
.viewer-image {
    max-width: 90%;
    max-height: 90vh;
    object-fit: contain;
    cursor: grab;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.image-viewer.active .viewer-image {
    opacity: 1;
}

.viewer-image.dragging {
    cursor: grabbing;
    transition: none;
}