/**
 * ImageLightbox - 图片灯箱效果样式
 * 
 * @version 1.0.0
 */

/* 灯箱遮罩层 */
.image-lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.image-lightbox-overlay.is-active {
    opacity: 1;
    visibility: visible;
}

/* 灯箱容器 */
.image-lightbox-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    max-width: 90%;
    max-height: 90%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

/* 灯箱图片 */
.image-lightbox-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transform: scale(1);
    transition: transform 0.3s ease, opacity 0.3s ease;
    opacity: 0;
    cursor: grab;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    border-radius: 4px;
}

.image-lightbox-image.is-loaded {
    opacity: 1;
}

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

/* 加载指示器 */
.image-lightbox-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: image-lightbox-spin 1s linear infinite;
}

@keyframes image-lightbox-spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* 导航按钮 */
.image-lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background-color: rgba(0, 0, 0, 0.5);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, background-color 0.3s ease;
    z-index: 10;
}

.image-lightbox-overlay:hover .image-lightbox-nav {
    opacity: 1;
    visibility: visible;
}

.image-lightbox-nav:hover {
    background-color: rgba(0, 0, 0, 0.8);
}

.image-lightbox-nav.prev {
    left: 20px;
}

.image-lightbox-nav.next {
    right: 20px;
}

.image-lightbox-nav::before {
    content: '';
    width: 0;
    height: 0;
    border-style: solid;
}

.image-lightbox-nav.prev::before {
    border-width: 8px 12px 8px 0;
    border-color: transparent #fff transparent transparent;
    margin-left: 4px;
}

.image-lightbox-nav.next::before {
    border-width: 8px 0 8px 12px;
    border-color: transparent transparent transparent #fff;
    margin-right: 4px;
}

/* 关闭按钮 */
.image-lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background-color: rgba(0, 0, 0, 0.5);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, background-color 0.3s ease;
    z-index: 10;
}

.image-lightbox-overlay:hover .image-lightbox-close {
    opacity: 1;
    visibility: visible;
}

.image-lightbox-close:hover {
    background-color: rgba(0, 0, 0, 0.8);
}

.image-lightbox-close::before,
.image-lightbox-close::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 2px;
    background-color: #fff;
    transform: rotate(45deg);
}

.image-lightbox-close::after {
    transform: rotate(-45deg);
}

/* 缩放控制 */
.image-lightbox-zoom {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.5);
    border-radius: 20px;
    padding: 8px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 10;
}

.image-lightbox-overlay:hover .image-lightbox-zoom {
    opacity: 1;
    visibility: visible;
}

.image-lightbox-zoom-btn {
    width: 30px;
    height: 30px;
    background-color: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease;
}

.image-lightbox-zoom-btn:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.image-lightbox-zoom-level {
    color: #fff;
    font-size: 12px;
    min-width: 40px;
    text-align: center;
}

/* 图片计数器 */
.image-lightbox-counter {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.5);
    color: #fff;
    padding: 6px 12px;
    border-radius: 15px;
    font-size: 12px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 10;
}

.image-lightbox-overlay:hover .image-lightbox-counter {
    opacity: 1;
    visibility: visible;
}

/* 错误提示 */
.image-lightbox-error {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: #fff;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    max-width: 300px;
    font-size: 14px;
}

/* 禁用动画 */
.image-lightbox-no-animation .image-lightbox-overlay,
.image-lightbox-no-animation .image-lightbox-container,
.image-lightbox-no-animation .image-lightbox-image,
.image-lightbox-no-animation .image-lightbox-nav,
.image-lightbox-no-animation .image-lightbox-close,
.image-lightbox-no-animation .image-lightbox-zoom,
.image-lightbox-no-animation .image-lightbox-counter {
    transition: none;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .image-lightbox-container {
        max-width: 95%;
        max-height: 95%;
    }
    
    .image-lightbox-nav {
        width: 40px;
        height: 40px;
    }
    
    .image-lightbox-nav.prev {
        left: 10px;
    }
    
    .image-lightbox-nav.next {
        right: 10px;
    }
    
    .image-lightbox-close {
        width: 35px;
        height: 35px;
        top: 10px;
        right: 10px;
    }
    
    .image-lightbox-zoom {
        bottom: 10px;
        padding: 6px 12px;
    }
    
    .image-lightbox-zoom-btn {
        width: 25px;
        height: 25px;
        font-size: 14px;
    }
    
    .image-lightbox-counter {
        top: 10px;
        font-size: 11px;
    }
}

@media (max-width: 480px) {
    .image-lightbox-nav {
        opacity: 1;
        visibility: visible;
    }
    
    .image-lightbox-close {
        opacity: 1;
        visibility: visible;
    }
    
    .image-lightbox-zoom {
        opacity: 1;
        visibility: visible;
    }
    
    .image-lightbox-counter {
        opacity: 1;
        visibility: visible;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .image-lightbox-nav,
    .image-lightbox-close,
    .image-lightbox-zoom,
    .image-lightbox-counter {
        opacity: 1;
        visibility: visible;
    }
}

/* 无动画支持 */
@media (prefers-reduced-motion: reduce) {
    .image-lightbox-overlay,
    .image-lightbox-container,
    .image-lightbox-image,
    .image-lightbox-nav,
    .image-lightbox-close,
    .image-lightbox-zoom,
    .image-lightbox-counter {
        transition: none;
    }
    
    .image-lightbox-loading {
        animation: none;
    }
}