/* 頁面容器的 3D 透視效果 */
.page-container {
    perspective: 1000px;
}
/* 單頁樣式與動畫 */
.page {
    transform-style: preserve-3d;
    transition: opacity 0.3s ease, transform 0.5s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    opacity: 1;
}
.page.fade-out {
    opacity: 0;
}
.page.fade-in {
    opacity: 1;
}
.page img {
    user-select: none;
    -webkit-user-drag: none;
}
/* 橫向建議提示樣式 */
.orientation-warning {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    flex-direction: column;
}
/* 左右滑動區域 */
.swipe-area {
    position: absolute;
    top: 0;
    width: 20%;
    height: 100%;
    z-index: 10;
}
.swipe-left {
    left: 0;
}
.swipe-right {
    right: 0;
}
/* 翻頁按鈕樣式 */
.page-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 20;
    opacity: 0.7;
    transition: opacity 0.3s;
}
.page-nav-btn:hover {
    opacity: 1;
}
.prev-btn {
    left: 10px;
}
.next-btn {
    right: 10px;
}
/* 直向時顯示橫向提示 */
@media (orientation: portrait) {
    .orientation-warning {
        display: flex;
    }
}
/* 圖片 Modal 動畫與樣式 */
#imageModal {
    transition: opacity 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
}
#imageModal.hidden {
    opacity: 0;
    pointer-events: none;
}
.modal-content {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.modal-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.5);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}
.modal-prev {
    left: 20px;
}
.modal-next {
    right: 20px;
}
.modal-nav.hidden {
    display: none;
}
.cursor-pointer{
    cursor: pointer;
}