/**
 * sidebar.css — Sidebar, pin, summon, and overlay chrome.
 * Split from style.css with rule order preserved.
 */
/* ==================== 左侧导航栏 ==================== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    z-index: 3000; /* 还原侧边栏自然层级，不再与全屏搜索 Overlay 竞争 */
    transition: width var(--sidebar-transition), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease;
    overflow: hidden;
}

/* --- Task 6.2: 智能折叠逻辑 (Sidebar Folded/Mini Mode) --- */
body.sidebar-folded .sidebar {
    width: var(--sidebar-mini-width);
}

body.sidebar-folded .sidebar:hover {
    width: var(--sidebar-width);
    box-shadow: 20px 0 50px rgba(0, 0, 0, 0.4);
    z-index: 4501;
}

body.sidebar-folded .sidebar-title,
body.sidebar-folded .sidebar:not(:hover) .sidebar-pin-btn,
body.sidebar-folded .sidebar:not(:hover) .nav-label,
body.sidebar-folded .sidebar:not(:hover) .sidebar-user-info span,
body.sidebar-folded .sidebar:not(:hover) .sidebar-quick-logout,
body.sidebar-folded .sidebar:not(:hover) .sidebar-admin-toolbar .nav-label,
body.sidebar-folded .sidebar:not(:hover) .admin-tools-submenu .nav-label,
body.sidebar-folded .sidebar:not(:hover) .nav-count {
    opacity: 0;
    visibility: hidden;
    width: 0;
    margin: 0;
    position: absolute;
}

body.sidebar-folded .sidebar:hover .sidebar-title,
body.sidebar-folded .sidebar:hover .sidebar-pin-btn,
body.sidebar-folded .sidebar:hover .nav-label,
body.sidebar-folded .sidebar:hover .sidebar-user-info span,
body.sidebar-folded .sidebar:hover .sidebar-quick-logout,
body.sidebar-folded .sidebar:hover .sidebar-admin-toolbar .nav-label,
body.sidebar-folded .sidebar:hover .admin-tools-submenu .nav-label,
body.sidebar-folded .sidebar:hover .nav-count {
    opacity: 1;
    visibility: visible;
    width: auto;
    position: static;
    transition: opacity 0.3s ease 0.1s;
}

body.sidebar-folded .sidebar-header {
    justify-content: center;
    padding: 20px 0 16px;
}

body.sidebar-folded .sidebar:hover .sidebar-header {
    justify-content: flex-start;
    padding: 20px 16px 16px;
}

body.sidebar-folded .sidebar-nav-item {
    justify-content: center;
    padding: 10px 0;
    margin: 4px 6px;
    border-radius: 12px;
}

body.sidebar-folded .sidebar-nav-item .nav-icon {
    margin: 0;
    font-size: 1.2rem;
}

body.sidebar-folded .sidebar:hover .sidebar-nav-item {
    justify-content: flex-start;
    padding: 10px 14px;
    margin: 4px 8px;
}

body.sidebar-folded .sidebar-user-section {
    padding: 12px 0;
    display: flex;
    justify-content: center;
}

body.sidebar-folded .sidebar:hover .sidebar-user-section {
    padding: 12px;
    display: block;
}

body.sidebar-folded .sidebar-admin-toolbar {
    padding: 6px 4px;
    justify-content: center;
    flex-direction: column;
    gap: 10px;
    background: transparent;
    border: none;
}

body.sidebar-folded .sidebar:hover .sidebar-admin-toolbar {
    padding: 4px;
    flex-direction: row;
    gap: 6px;
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--glass-border);
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px 16px 16px;
    border-bottom: 1px solid var(--glass-border);
    flex-shrink: 0;
}

.sidebar-logo {
    font-size: 24px;
    flex-shrink: 0;
}

.sidebar-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 10px 8px;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.15) transparent;
}

.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.15);
    border-radius: 4px;
}

.sidebar-nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 10px;
    color: var(--text-dim);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    border: 1px solid transparent;
    margin-bottom: 3px;
    user-select: none;
}

.sidebar-nav-item .nav-icon {
    font-size: 18px;
    flex-shrink: 0;
    width: 22px;
    text-align: center;
}

.sidebar-nav-item .nav-label {
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-nav-item:hover:not(.active) {
    background: rgba(255, 255, 255, 0.08);
}

.sidebar-nav-item.active {
    background: var(--primary);
    color: white;
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 15px rgba(57, 157, 255, 0.45);
    font-weight: 600;
    transform: translateX(4px);
}

/* 侧边栏分组样式 (Task 4.1) */
.sidebar-group {
    margin-bottom: 20px;
    padding: 0 8px;
}

.sidebar-group-title {
    padding: 8px 12px 6px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--text-dim);
    opacity: 0.45;
    pointer-events: none;
}

/* 管理员模式侧边栏视觉区分 */
body.admin-mode .sidebar {
    border-left: 4px solid var(--primary);
    background: linear-gradient(180deg, rgba(30, 45, 65, 0.95) 0%, rgba(15, 15, 20, 0.98) 100%);
}

body.light-theme.admin-mode .sidebar {
    border-left-color: var(--primary);
    background: linear-gradient(180deg, rgba(245, 248, 255, 0.98) 0%, rgba(255, 255, 255, 0.98) 100%);
}

.sidebar-nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 20%;
    height: 60%;
    width: 4px;
    background: white;
    border-radius: 0 4px 4px 0;
}

.sidebar-nav-item.hidden-item {
    opacity: 0.4;
    text-decoration: line-through;
}

.sidebar-footer {
    padding: 12px 8px;
    border-top: 1px solid var(--glass-border);
    flex-shrink: 0;
    background: var(--sidebar-bg);
    backdrop-filter: blur(10px);
    /* Task 28.1: 锚点化底部区域 */
    position: sticky;
    bottom: 0;
    z-index: 10;
    overflow: visible !important;
}

.sidebar-admin-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow: visible !important;
}

.sidebar-nav-label {
    padding: 12px 14px 8px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.25);
    letter-spacing: 1.2px;
    user-select: none;
}

.admin-tool-btn {
    opacity: 0.8;
    background: transparent;
    border: 1px solid transparent;
}

.admin-tool-btn:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
}

.admin-tool-btn.active {
    background: rgba(57, 157, 255, 0.1) !important;
    color: var(--primary) !important;
    border-color: rgba(57, 157, 255, 0.2) !important;
    box-shadow: none !important;
    transform: none !important;
}

.admin-tool-btn.active::before {
    display: none;
}

.admin-tool-btn.disabled {
    opacity: 0.3;
    cursor: not-allowed;
    filter: grayscale(1);
}

.sidebar-user-section {
    padding: 12px;
    border-bottom: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.02);
    flex-shrink: 0;
}

.sidebar-user-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: var(--glass-bg);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.sidebar-user-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(57, 157, 255, 0.25);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(57, 157, 255, 0.15);
}

body.light-theme .sidebar-user-card:hover {
    background: rgba(255, 255, 255, 0.65);
    border-color: rgba(57, 157, 255, 0.4);
    box-shadow: 0 4px 15px rgba(57, 157, 255, 0.12);
}

.sidebar-user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    cursor: pointer;
    min-width: 0;
}

.user-avatar-wrapper {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(57, 157, 255, 0.15), rgba(57, 157, 255, 0.05));
    border: 1px solid rgba(57, 157, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.sidebar-user-card:hover .user-avatar-wrapper {
    transform: scale(1.05);
    background: linear-gradient(135deg, rgba(57, 157, 255, 0.25), rgba(57, 157, 255, 0.1));
    border-color: rgba(57, 157, 255, 0.4);
}

.user-avatar-wrapper i {
    font-size: 16px;
    color: var(--primary);
}

.user-meta-box {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.user-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: flex;
    align-items: center;
}

body.light-theme .user-name {
    color: #2c3e50;
}

.user-uid {
    font-size: 10px;
    opacity: 0.5;
    font-family: monospace;
}

.user-role-badge {
    font-size: 8px;
    font-weight: bold;
    padding: 1px 5px;
    border-radius: 4px;
    margin-left: 6px;
    line-height: 1.2;
    flex-shrink: 0;
    letter-spacing: 0.5px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar-quick-logout {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.sidebar-quick-logout:hover {
    background: rgba(231, 76, 60, 0.15);
    color: #e74c3c;
    transform: scale(1.08);
}

.logout-btn {
    color: #ff6b6b !important;
}

.sidebar-footer .manage-cat-btn {
    width: 100%;
    text-align: left;
    padding: 8px 14px;
    font-size: 13px;
}

/* 移动端侧边栏切换按钮 */
.sidebar-toggle {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1500; /* 高于大部分元素但低于 Modal */
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    width: 45px;
    height: 45px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 1px solid var(--glass-border);
    color: var(--text);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    
    /* 默认平时闲置退缩贴边半遮挡（向左退 25px，保留 20px 在屏幕边缘可碰） */
    opacity: 0.45;
    transform: translateX(-25px);
}

/* 移动端/禅意模式搜索召唤按钮 (Task S.3) */
.summon-search-btn {
    position: fixed;
    top: 20px;
    right: 25px;
    z-index: 2500;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    width: 45px;
    height: 45px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 1px solid var(--glass-border);
    color: var(--text);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    
    /* 默认平时闲置退缩贴边半遮挡（向右退 25px，保留 20px 在屏幕边缘可碰） */
    opacity: 0.45;
    transform: translateX(25px);
}

/* 激活弹出态（正在滚动、侧边栏开启、或处于搜索激活状态时，完全弹出来） */
body.scroll-active .sidebar-toggle,
body.sidebar-open .sidebar-toggle,
body.scroll-active .summon-search-btn,
body.sidebar-open .summon-search-btn,
body.search-active .summon-search-btn {
    opacity: 1;
    transform: translateX(0);
}

.sidebar-toggle:hover {
    background: var(--glass-hover);
    transform: scale(1.05) translateX(0) !important;
    color: var(--primary);
    opacity: 1;
}

.summon-search-btn:hover {
    background: var(--glass-hover);
    transform: scale(1.05) translateX(0) !important;
    color: var(--primary);
    opacity: 1;
}

body.search-active .sidebar-toggle,
body.search-active .summon-search-btn {
    opacity: 0;
    pointer-events: none;
    transform: translateY(-20px);
}

/* 禅意模式静默态隐藏按钮 */
body.zen-active.zen-silent .summon-search-btn {
    opacity: 0;
    pointer-events: none;
    transform: translateY(-20px);
}

body.zen-active:not(.zen-silent) .summon-search-btn {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

/* 移动端常驻显示 (除搜索激活态) */
@media (max-width: 768px) {
    .sidebar-toggle,
    .summon-search-btn {
        width: 40px;
        height: 40px;
        border-radius: 10px;
        top: auto !important; /* 强行屏蔽任何管理员顶栏或公告栏引起的吸顶规则，锁死底部定位 */
    }
    .sidebar-toggle {
        left: auto; /* 重置 desktop 默认的左侧定位 */
        right: 15px; /* 改到右侧 */
        bottom: calc(192px + env(safe-area-inset-bottom, 0px)); /* 完美叠在搜索按钮之上（搜索按钮140px + 高度40px + 12px间距） */
        transform: translateX(35px); /* 一半隐藏在右侧 (15px间距 + 20px半宽度) */
    }
    .summon-search-btn {
        right: 15px;
        bottom: calc(140px + env(safe-area-inset-bottom, 0px)); /* 中下部黄金单手触控区 */
        transform: translateX(35px); /* 一半隐藏在右侧 (15px间距 + 20px半宽度) */
    }
}

/* 极简模式下的游客引导 (UX Bridge) */
.guest-login-bridge {
    margin-top: 15px;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: color 0.3s;
    text-decoration: underline;
    text-underline-offset: 4px;
}

.guest-login-bridge:hover {
    color: var(--primary);
}

.zen-active .sidebar-toggle {
    opacity: 0.6; /* 极简模式下降低干扰 */
}
.zen-active .sidebar-toggle:hover {
    opacity: 1;
}