/* ================================================
   Components CSS - Header & Footer
   Bootstrap 定制样式
   ================================================ */

/* 南大紫色变量 */
:root {
    --nju-purple: #5f2658;
    --nju-purple-dark: #4a1e45;
    --nju-purple-light: #7d3372;
    
    /* 覆盖 Bootstrap 主色为南大紫 */
    --bs-primary: #7d3372;
    --bs-primary-rgb: 125, 51, 114;

    --site-content-max: 1320px;
    --site-side-inset: 40px;
}

/* ================================================
   Bootstrap 按钮样式覆盖
   ================================================ */

/* Primary 按钮 */
.btn-primary {
    background-color: var(--nju-purple-light) !important;
    border-color: var(--nju-purple-light) !important;
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--nju-purple) !important;
    border-color: var(--nju-purple) !important;
}

.btn-primary:active,
.btn-primary.active {
    background-color: var(--nju-purple-dark) !important;
    border-color: var(--nju-purple-dark) !important;
}

/* Outline Primary 按钮 */
.btn-outline-primary {
    color: var(--nju-purple-light) !important;
    border-color: var(--nju-purple-light) !important;
    background-color: transparent !important;
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
    background-color: var(--nju-purple-light) !important;
    border-color: var(--nju-purple-light) !important;
    color: #fff !important;
}

.btn-outline-primary:active,
.btn-outline-primary.active,
.btn-check:checked + .btn-outline-primary,
.btn-check:active + .btn-outline-primary {
    background-color: var(--nju-purple) !important;
    border-color: var(--nju-purple) !important;
    color: #fff !important;
}

/* 确保 focus 状态也是紫色 */
.btn-outline-primary:focus-visible {
    box-shadow: 0 0 0 0.25rem rgba(125, 51, 114, 0.5) !important;
}

.btn-primary:focus-visible {
    box-shadow: 0 0 0 0.25rem rgba(125, 51, 114, 0.5) !important;
}

/* Text Primary */
.text-primary {
    color: var(--nju-purple-light) !important;
}

/* Spinner Primary */
.spinner-border.text-primary {
    color: var(--nju-purple-light) !important;
}

/* ================================================
   Header / Navbar
   ================================================ */

/* 深沉的半透明背景 */
.navbar {
    background-color: rgba(58, 23, 50, 0.85) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding-top: 1.25rem;
    padding-bottom: 1.25rem;
}

/* 限制导航栏内容最大宽度 */
.navbar .container-fluid {
    max-width: 1320px;
    margin: 0 auto;
}

/* 页面左右留白：≥768px 两侧不小于 40px；内容区最大 1320px，更宽视口下仅留白缩小 */
@media (min-width: 768px) {
    .container,
    .navbar .container-fluid {
        max-width: var(--site-content-max);
        width: calc(100% - 2 * var(--site-side-inset));
        margin-left: auto;
        margin-right: auto;
    }
}

/* 导航链接 */
.navbar-nav .nav-link {
    padding: 0.6rem 1rem;
    transition: all 0.3s ease;
}

.navbar-nav .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* 活动状态 */
.navbar-nav .nav-link.active {
    font-weight: 600;
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: 0.25rem;
}

/* Logo 悬停效果 */
.navbar-brand img {
    transition: opacity 0.3s ease;
}

.navbar-brand:hover img {
    opacity: 0.85;
}

/* 移动端菜单按钮 */
.navbar-toggler {
    border-color: rgba(255, 255, 255, 0.5);
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 0.25rem rgba(125, 51, 114, 0.5);
}

/* ================================================
   Footer
   ================================================ */

#footer-placeholder {
    margin-top: 4rem;
}

/* 深沉南大紫背景 + 格子纹 */
.footer-dark {
    background-color: #2a1324;
    background-image: 
        linear-gradient(rgba(125, 51, 114, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(125, 51, 114, 0.05) 1px, transparent 1px);
    background-size: 30px 30px;
    color: #fff;
}

footer a {
    transition: color 0.3s ease;
}

footer a:hover {
    color: var(--nju-purple-light) !important;
}

/* 二维码白底边框 */
.qr-code-wrapper {
    background-color: #fff;
    padding: 4px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    max-width: 170px;
}

.qr-code-wrapper img {
    display: block;
    width: 100%;
    height: auto;
}

/* ================================================
   文本缩进工具类
   ================================================ */

.text-indent-2 {
    text-indent: 2em;
}

/* ================================================
   页面筛选工具栏（展览、藏品等共用）
   ================================================ */

.page-toolbar {
    background: #fff;
    border-bottom: 1px solid #eee;
    padding: 1.25rem 0;
}

.page-toolbar-inner {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.page-search-wrap {
    position: relative;
    max-width: 360px;
}

.page-search-icon {
    position: absolute;
    left: 0.85rem;
    top: 50%;
    transform: translateY(-50%);
    color: #aaa;
    pointer-events: none;
}

.page-search-input {
    padding-left: 2.25rem;
    border-radius: 999px;
    border-color: #ddd;
}

.page-search-input:focus {
    border-color: var(--nju-purple-light);
    box-shadow: 0 0 0 0.2rem rgba(125, 51, 114, 0.15);
}

.page-filter-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.75rem;
}

.page-filter-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: #888;
    flex-shrink: 0;
}

.page-filter-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.page-filter-pill {
    border: 1px solid #ddd;
    background: #fff;
    color: #555;
    font-size: 0.82rem;
    padding: 0.3rem 0.85rem;
    border-radius: 999px;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.page-filter-pill:hover {
    border-color: var(--nju-purple-light);
    color: var(--nju-purple);
}

.page-filter-pill.active {
    background: var(--nju-purple-light);
    border-color: var(--nju-purple-light);
    color: #fff;
}

.page-result-count {
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: #888;
}