/* --- Glassmorphism UI - Final Polished Version --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;700&display=swap');

:root {
    --font-main: 'Inter', sans-serif;
    --border-radius: 20px;
    --transition-speed: 0.3s ease;
    --sidebar-width: 280px;
}

/* 1. 全局 & 背景 */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { height: 100%; }
body {
    font-family: var(--font-main);
    background-color: #111827;
    color: #ffffff;
    height: 100%;
    line-height: 1.6;
}
/* 在桌面端，主应用页面本身不滚动，由内部容器滚动 */
body:not(.login-page) { overflow: hidden; }

.page-background {
    position: fixed; top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(135deg, #ff00ff, #00ffff);
    z-index: -2; overflow: hidden;
}
.page-background::before, .page-background::after {
    content: ''; position: absolute;
    width: clamp(300px, 40vw, 600px); height: clamp(300px, 40vw, 600px);
    border-radius: 50%; opacity: 0.6; filter: blur(80px); z-index: -1;
}
.page-background::before {
    top: -10%; left: -10%;
    background: linear-gradient(45deg, #f87171, #60a5fa);
    animation: move-blob 15s infinite alternate;
}
.page-background::after {
    bottom: -10%; right: -10%;
    background: linear-gradient(45deg, #34d399, #fbbf24);
    animation: move-blob 20s infinite alternate-reverse;
}
@keyframes move-blob {
    from { transform: translate(0, 0) scale(1); }
    to { transform: translate(100px, 50px) scale(1.2); }
}

.is-loading > *:not(.page-background) {
    display: none !important;
}

/* 2. 玻璃拟态效果 */
.glass-pane {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    transition: var(--transition-speed);
}

/* 3. 通用组件 */
.button, button {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 0.5rem; padding: 12px 24px; font-weight: 700;
    border-radius: 12px; cursor: pointer; border: none;
    transition: all 0.3s; color: white;
    background: rgba(255, 255, 255, 0.1);
    white-space: nowrap;
}
.button:hover, button:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}
.button.button-primary { background: rgba(99, 102, 241, 0.8); }
.button.button-primary:hover { background: rgba(99, 102, 241, 1); }
button:disabled { cursor: not-allowed; opacity: 0.7; transform: none; }

.button-icon {
    padding: 0; width: 38px; height: 38px;
    font-size: 1rem; border-radius: 50%;
    flex-shrink: 0;
}
.button-icon.danger:hover { background: rgba(239, 68, 68, 0.2); }

#action-btn {
    padding: 0 20px; width: auto; height: 44px;
    font-size: 1rem; gap: 0.5rem; border-radius: 12px;
}
#action-btn i { font-size: 1.2rem; margin: 0; }

input, textarea, select {
    width: 100%; background: transparent; border: none;
    border-bottom: 2px solid rgba(255, 255, 255, 0.2);
    padding: 10px 4px; color: white; font-size: 1rem;
    transition: border-color 0.3s;
    border-radius: 0;
}
input:focus, textarea:focus, select:focus { outline: none; border-bottom-color: white; }
input::placeholder, textarea::placeholder { color: rgba(255, 255, 255, 0.7); }

select {
    -webkit-appearance: none; -moz-appearance: none; appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 1em;
    padding-right: 2rem;
}
select option { background: rgba(30, 41, 59, 0.95); color: #f1f5f9; }

label { display: block; margin-bottom: 0.5rem; font-weight: 700; }
.form-group { margin-bottom: 1rem; }
.error-message, .modal-error-message { color: #f87171; text-align: center; min-height: 1.2em; font-weight: 700; margin-top: 1rem; }
.empty-message { text-align: center; padding: 4rem 0; font-size: 1.2rem; opacity: 0.7; }

/* 4. 布局 */
body.login-page { display: flex; align-items: center; justify-content: center; padding: 1rem; }
.auth-box { width: 100%; max-width: 384px; padding: 2rem; text-align: center; }
.auth-title { font-size: 2.25rem; font-weight: 700; margin-bottom: 1rem; }
.auth-subtitle { margin-bottom: 1.5rem; opacity: 0.8; }
.auth-box .full-width { width: 100%; padding: 14px; }
#login-form .button { margin-top: 1.5rem; }

#app-layout { display: flex; height: 100vh; padding: 1.5rem; gap: 1.5rem; }
.sidebar { width: var(--sidebar-width); flex-shrink: 0; padding: 1.5rem; display: flex; flex-direction: column; transition: margin-left var(--transition-speed); }
.sidebar-header { padding-bottom: 1rem; margin-bottom: 1rem; border-bottom: 1px solid rgba(255,255,255,0.2); }
.category-nav { list-style: none; }
.category-nav.dynamic { flex-grow: 1; overflow-y: auto; padding-right: 10px;}
#sidebar-footer-nav { margin-top: auto; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,0.2); }
.category-nav li { display: flex; align-items: center; gap: 0.75rem; padding: 12px; border-radius: 10px; cursor: pointer; font-weight: 700; transition: var(--transition-speed); }
.category-nav li:hover { background: rgba(255, 255, 255, 0.15); }
.category-nav li.active { background: rgba(255, 255, 255, 0.2); }
.star-icon { margin-left: auto; padding: 5px; cursor: pointer; opacity: 0.7; transition: var(--transition-speed); z-index: 5; position: relative;}
.star-icon:hover, .star-icon.is-default { opacity: 1; transform: scale(1.2); }
.star-icon.is-default { color: #fbbf24; }
.main-content { flex-grow: 1; display: flex; flex-direction: column; gap: 1.5rem; min-width: 0; }
.header { display: flex; align-items: center; gap: 1rem; padding: 0.75rem 1.5rem; }
.header-right { margin-left: auto; display: flex; align-items: center; gap: 0.75rem; }
.search-bar { flex-grow: 1; }
.search-bar form { display: flex; align-items: center; }
.search-bar select { width: 130px; flex-shrink: 0; border-radius: 0; border-right: 2px solid rgba(255,255,255,0.5); }
.search-bar input { padding-left: 1rem; }

#bookmarks-grid { flex-grow: 1; overflow-y: auto; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1rem; padding: 0 10px 10px 0; align-content: start; }
.bookmark-card { padding: 1.25rem; text-decoration: none; color: white; display: flex; flex-direction: column; }
.bookmark-card:hover { transform: translateY(-5px); box-shadow: 0 12px 40px rgba(31, 38, 135, 0.4); }
.bookmark-card h3 { display: flex; align-items: center; gap: 12px; font-size: 1.1rem; font-weight: 700; flex-shrink: 0; word-break: break-all; }
.bookmark-card img { width: 24px; height: 24px; border-radius: 6px; flex-shrink: 0; }
.bookmark-card p { font-size: 0.9rem; opacity: 0.8; margin-top: 0.75rem; flex-grow: 1; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; word-break: break-all; }
.bookmark-level-separator { grid-column: 1 / -1; height: 0; border-top: 1px solid rgba(255, 255, 255, 0.15); margin: 1rem 0 0.5rem 0; }

#admin-page-container { display: flex; flex-direction: column; height: 100vh; padding: 1.5rem; gap: 1.5rem; }
.admin-header { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.5rem; flex-shrink: 0; }
.admin-header h1 { font-size: 1.5rem; }
.admin-panel-container { flex-grow: 1; display: flex; overflow: hidden; }
.admin-panel-nav { width: 240px; flex-shrink: 0; padding: 1rem; border-top-right-radius: 0; border-bottom-right-radius: 0; background: rgba(255,255,255,0.1); }
.admin-panel-content { flex-grow: 1; padding: 1.5rem; border-top-left-radius: 0; border-bottom-left-radius: 0; background: rgba(0,0,0,0.1); display: flex; flex-direction: column; overflow: hidden; }
.admin-panel-nav a { display: flex; align-items: center; gap: 0.75rem; padding: 12px; border-radius: 10px; text-decoration: none; color: white; margin-bottom: 0.5rem; font-weight: 700; }
.admin-panel-nav a.active, .admin-panel-nav a:hover { background: rgba(255, 255, 255, 0.15); }
.admin-tab-content { display: none; flex-grow: 1; flex-direction: column; overflow: hidden; }
.admin-tab-content.active { display: flex; animation: fadeIn 0.5s; }
.admin-panel-actions { margin-top: auto; border-top: 1px solid rgba(255,255,255,0.2); padding-top: 1rem; display: flex; gap: 1rem; }
.category-admin-header, .bookmark-admin-header { display: flex; align-items: center; gap: 1rem; padding: 0.75rem; font-weight: 700; border-bottom: 1px solid rgba(255, 255, 255, 0.1); flex-shrink: 0;}
#category-admin-list, #bookmark-admin-list-container ul { list-style: none; }
#category-admin-list li, #bookmark-admin-list-container li { display: flex; align-items: center; gap: 1rem; padding: 0.5rem 0.75rem; border-bottom: 1px solid rgba(255,255,255,0.1);}
.category-admin-header span:nth-child(1), .cat-order-input, .bm-sort-order { flex: 0 0 50px; text-align: center; }
.category-admin-header span:nth-child(2), .cat-name-cell, .bm-name-input { flex-grow: 1; }
.category-admin-header span:nth-child(3), .cat-parent-select, .bm-category-select { flex: 0 0 220px; }
.category-admin-header span:nth-child(4), #category-admin-list li .cat-actions, #bookmark-admin-list-container li .bm-admin-actions { flex: 0 0 100px; display: flex; justify-content: flex-end; }
#user-management-container { display: grid; grid-template-columns: 1fr 2fr; gap: 2rem; height: 100%; overflow: hidden;}
.user-list-container, .user-form-container { display: flex; flex-direction: column; overflow: hidden; }
#user-list { list-style: none; overflow-y: auto; flex-grow: 1; border: 1px solid rgba(255,255,255,0.2); border-radius: 12px; }
#user-list li { padding: 0.75rem 1rem; border-bottom: 1px solid rgba(255,255,255,0.2); cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
#user-list li:last-child { border-bottom: none; }
#user-list li:hover, #user-list li.selected { background-color: rgba(255, 255, 255, 0.1); }
.user-form-container form { height: 100%; display: flex; flex-direction: column; }
.form-group-inline { display: grid; grid-template-columns: 120px 1fr; align-items: center; gap: 1rem; margin-bottom: 1rem; }
.form-group-inline label { margin-bottom: 0; text-align: right; font-weight: normal; opacity: 0.8; }
.form-group.flex-grow { flex-grow: 1; min-height: 0; display: flex; flex-direction: column; }
.input-with-feedback { position: relative; display: flex; align-items: center; }
.feedback-text { position: absolute; right: 10px; font-size: 0.8em; }
#user-form-categories.checkbox-group { flex-grow: 1; overflow-y: auto; border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 12px; padding: 1rem; }
.checkbox-group.horizontal { display: flex; flex-direction: row; flex-wrap: wrap; gap: 1rem; border: none; padding: 0; align-items: center; }
.checkbox-group div { display: flex; align-items: center; gap: 0.25rem; }
.checkbox-group input[type="checkbox"], .checkbox-group input[type="radio"] { width: auto; margin: 0; flex-shrink: 0; }

.modal-backdrop { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.3); backdrop-filter: blur(5px); z-index: 1000; justify-content: center; align-items: center; padding: 1rem; }
.modal { padding: 2rem; max-width: 500px; width: 100%; position: relative; }
.modal .close-btn { position: absolute; top: 1rem; right: 1rem; font-size: 1.5rem; color: white; cursor: pointer; border: none; background: none; }
.modal-content.small { text-align: center; }
.confirm-buttons { display: flex; justify-content: center; gap: 1rem; margin-top: 1.5rem;}
#bookmark-edit-modal, #confirm-modal { display: none; }

#app-layout.sidebar-collapsed .sidebar { margin-left: calc(-1 * var(--sidebar-width) - 1.5rem); }
#app-layout.sidebar-collapsed { padding-left: 0; }
#mobile-sidebar-toggle { display: none; }

/* 5. 移动端响应式设计 */
@media (max-width: 900px) {
    body:not(.login-page) { overflow: auto; }
    #app-layout, #admin-page-container { height: auto; }

    #app-layout { padding: 0; flex-direction: column; gap: 0; }
    #sidebar-toggle-btn { display: none; }
    #mobile-sidebar-toggle { display: inline-flex; }
    .main-content { padding: 1rem; gap: 1rem; border-radius: 0; }
    .header { padding: 0.75rem; flex-wrap: wrap; gap: 0.75rem; }
    .header-left { flex-grow: 1; }
    .header-right { margin-left: 0; }
    .search-bar { width: 100%; order: 3; }
    .sidebar { position: fixed; top: 0; left: 0; height: 100%; z-index: 2000; transform: translateX(-100%); box-shadow: 4px 0 25px rgba(0,0,0,0.3); }
    #app-layout.sidebar-open .sidebar { transform: translateX(0); }
    #app-layout::after { content: ''; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.5); z-index: 1999; opacity: 0; visibility: hidden; transition: var(--transition-speed); }
    #app-layout.sidebar-open::after { opacity: 1; visibility: visible; }
    
    #admin-page-container { padding: 1rem; gap: 1rem; }
    .admin-header h1 { font-size: 1.2rem; }
    .admin-header .button { padding: 8px 12px; font-size: 0.9rem;}
    .admin-panel-container { flex-direction: column; gap: 1rem; background: transparent; border: none; box-shadow: none; overflow: visible; }
    .admin-panel-nav, .admin-panel-content { width: 100%; border-radius: var(--border-radius); background: rgba(255,255,255,0.1); border: 1px solid rgba(255, 255, 255, 0.1); }
    .admin-panel-content, .admin-tab-content, .user-list-container, #user-list, .user-form-container { overflow: visible; }
    
    .category-admin-header, .bookmark-admin-header { display: none; }
    #category-admin-list li, #bookmark-admin-list-container li {
        display: grid;
        grid-template-columns: 50px 1fr auto;
        grid-template-areas: 
            "sort name actions"
            "sort select actions";
        gap: 0.5rem 1rem;
        padding: 0.75rem;
        margin-bottom: 0.5rem;
        border-radius: 8px;
        background: rgba(255,255,255,0.05);
        border: none;
    }
    .cat-order-input, .bm-sort-order { grid-area: sort; }
    .cat-name-cell, .bm-name-input { grid-area: name; }
    .cat-parent-select, .bm-category-select { grid-area: select; }
    .cat-actions, .bm-admin-actions { grid-area: actions; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0.5rem; }
    #category-admin-list li > *, #bookmark-admin-list-container li > * { margin-bottom: 0; }
    .cat-name-cell { padding-left: 0 !important; }

    #user-management-container { grid-template-columns: 1fr; gap: 1.5rem; height: auto; }
    .form-group-inline { grid-template-columns: 1fr; }
    .form-group-inline label { text-align: left; }
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }


/* --- 用于引导安装界面的样式 --- */
.installer-container {
    text-align: center;
}
.installer-status {
    margin-top: 1.5rem;
    font-weight: bold;
    min-height: 1.5rem;
    transition: color 0.3s;
}