/**
 * 自动隐藏页眉样式
 * 可复用的页眉隐藏/展开功能
 *
 * 使用方法：
 * 1. 在页面中引入此CSS文件
 * 2. 在页眉元素上添加 class="auto-hide-header" id="autoHideHeader"
 * 3. 引入 auto-hide-header.js 初始化功能
 */

/* 防止页面闪烁的关键样式 - 初始隐藏状态（不使用!important以便JavaScript覆盖） */
#autoHideHeader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    transform: translateY(-100%);
    visibility: hidden;
    opacity: 0;
    z-index: var(--z-auto-hide-header, 9500);
}

/* 自动隐藏页眉样式 - JavaScript接管后的ready状态 */
.auto-hide-header.ready {
    transition: transform 0.3s cubic-bezier(0.4, 0.0, 0.2, 1),
                visibility 0.3s ease,
                opacity 0.3s ease;
}

/* 显示状态 - 使用!important确保能覆盖初始状态 */
.auto-hide-header.ready.show {
    transform: translateY(0) !important;
    visibility: visible !important;
    opacity: 1 !important;
}

/* 导航栏基础样式 */
.auto-hide-header .top-nav.modern-header {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    padding: 1rem 0;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e0e6ed;
}

[data-theme="dark"] .auto-hide-header .top-nav.modern-header {
    background: rgba(26, 32, 44, 0.95);
    border-bottom: 1px solid #4a5568;
}

.auto-hide-header .nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.auto-hide-header .nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c3e50;
    transition: all 0.3s ease;
}

[data-theme="dark"] .auto-hide-header .nav-logo {
    color: #ffffff;
}

.auto-hide-header .nav-logo:hover {
    color: #4ECDC4;
}

.auto-hide-header .nav-logo i {
    color: #4ECDC4;
    margin-right: 0.5rem;
    font-size: 1.3rem;
}

.auto-hide-header .nav-center {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.auto-hide-header .nav-link.modern-link {
    color: #2c3e50;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 10px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
}

[data-theme="dark"] .auto-hide-header .nav-link.modern-link {
    color: #ffffff;
}

.auto-hide-header .nav-link.modern-link:hover {
    background: #f8f9fa;
    color: #4ECDC4;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .auto-hide-header .nav-link.modern-link:hover {
    background: #2d3748;
}

.auto-hide-header .nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.auto-hide-header .nav-dropdown {
    position: relative;
    display: inline-block;
}

/* 下拉菜单预加载状态 - 提供即时视觉反馈 */
.auto-hide-header .dropdown-preload .nav-link {
    background: rgba(78, 205, 196, 0.08);
    transform: translateY(-1px);
    transition: all 0.1s ease-out;
}

.auto-hide-header .dropdown-preload .user-toggle {
    background: rgba(78, 205, 196, 0.08);
    transform: translateY(-1px);
    transition: all 0.1s ease-out;
}

/* 鼠标接近状态 - 微妙的预热效果 */
.auto-hide-header .dropdown-near .nav-link,
.auto-hide-header .dropdown-near .user-toggle {
    filter: brightness(1.05);
    transition: filter 0.2s ease-out;
}

/* 下拉菜单样式 - 增加间距减少意外触发 */
.auto-hide-header .modern-dropdown,
.auto-hide-header .dropdown-content {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    background: rgba(255, 255, 255, 0.98);
    min-width: 200px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    border-radius: 16px;
    padding: 0.8rem;
    z-index: var(--z-header-dropdown, 9600);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    margin-top: 0;
}

/* 创建下拉菜单与页眉之间的连接区域 - 减少触发灵敏度 */
.auto-hide-header .nav-dropdown::before {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 8px;
    pointer-events: auto;
    z-index: 9998;
}

/* 用户下拉菜单连接区域 - 减少触发灵敏度 */
.auto-hide-header .user-dropdown::before {
    content: '';
    position: absolute;
    top: 100%;
    right: 0;
    width: 100%;
    height: 8px;
    pointer-events: auto;
    z-index: 9998;
}

[data-theme="dark"] .auto-hide-header .modern-dropdown,
[data-theme="dark"] .auto-hide-header .dropdown-content {
    background: rgba(44, 62, 80, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.auto-hide-header .nav-dropdown:hover .modern-dropdown,
.auto-hide-header .nav-dropdown:hover .dropdown-content,
.auto-hide-header .modern-dropdown.show,
.auto-hide-header .dropdown-content.show {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
    animation: fadeInDown 0.2s ease;
    transition: opacity 0.1s ease-in, visibility 0.1s ease-in, transform 0.1s ease-in;
}

.auto-hide-header .dropdown-item-modern,
.auto-hide-header .dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.75rem 1rem;
    color: #2c3e50;
    text-decoration: none;
    border-radius: 10px;
    transition: all 0.25s ease;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.2rem;
}

[data-theme="dark"] .auto-hide-header .dropdown-item-modern,
[data-theme="dark"] .auto-hide-header .dropdown-item {
    color: #ffffff;
}

.auto-hide-header .dropdown-item-modern:hover,
.auto-hide-header .dropdown-item:hover {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.12) 0%, rgba(78, 205, 196, 0.08) 100%);
    color: #4ECDC4;
    transform: translateX(6px) scale(1.02);
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.15);
}

.auto-hide-header .dropdown-item-modern i,
.auto-hide-header .dropdown-item i {
    width: 18px;
    text-align: center;
    opacity: 0.8;
    font-size: 1rem;
    transition: all 0.25s ease;
}

.auto-hide-header .dropdown-item-modern:hover i,
.auto-hide-header .dropdown-item:hover i {
    opacity: 1;
    transform: scale(1.1);
    color: #4ECDC4;
}

.auto-hide-header .dropdown-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, #e0e6ed 50%, transparent 100%);
    margin: 0.8rem 0;
    border: none;
}

[data-theme="dark"] .auto-hide-header .dropdown-divider {
    background: linear-gradient(90deg, transparent 0%, #4a5568 50%, transparent 100%);
}

.auto-hide-header .dropdown-section-header {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.5rem;
    margin-bottom: 0.3rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.auto-hide-header .dropdown-section-header i {
    font-size: 0.8rem;
    color: #4ECDC4;
}

/* 用户按钮样式 */
.auto-hide-header .user-toggle.modern-btn {
    background: transparent;
    border: 2px solid #4ECDC4;
    color: #4ECDC4;
    padding: 0.6rem 1.2rem;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-size: 0.9rem;
}

[data-theme="dark"] .auto-hide-header .user-toggle.modern-btn {
    border-color: #4ECDC4;
    color: #4ECDC4;
}

.auto-hide-header .user-toggle.modern-btn:hover {
    background: #4ECDC4;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

/* 用户下拉菜单定位 - 增加间距减少意外触发 */
.auto-hide-header .user-dropdown .dropdown-content {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: auto;
    right: 0;
    transform: translateX(0) translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    background: rgba(255, 255, 255, 0.98);
    min-width: 200px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    border-radius: 16px;
    padding: 0.8rem;
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    margin-top: 0;
    z-index: var(--z-header-dropdown, 9600);
}

[data-theme="dark"] .auto-hide-header .user-dropdown .dropdown-content {
    background: rgba(44, 62, 80, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.auto-hide-header .user-dropdown:hover .dropdown-content {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(0) translateY(0);
    animation: fadeInDown 0.2s ease;
}

/* 用户下拉菜单项样式 */
.auto-hide-header .user-dropdown .dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.75rem 1rem;
    color: #2c3e50;
    text-decoration: none;
    border-radius: 10px;
    transition: all 0.25s ease;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.2rem;
}

[data-theme="dark"] .auto-hide-header .user-dropdown .dropdown-item {
    color: #ffffff;
}

.auto-hide-header .user-dropdown .dropdown-item:hover {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.12) 0%, rgba(78, 205, 196, 0.08) 100%);
    color: #4ECDC4;
    transform: translateX(6px) scale(1.02);
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.15);
}

.auto-hide-header .user-dropdown .dropdown-item i {
    width: 18px;
    text-align: center;
    opacity: 0.8;
    font-size: 1rem;
    transition: all 0.25s ease;
}

.auto-hide-header .user-dropdown .dropdown-item:hover i {
    opacity: 1;
    transform: scale(1.1);
    color: #4ECDC4;
}

/* 主题切换项样式 */
.auto-hide-header .theme-toggle-item {
    cursor: pointer;
}

.auto-hide-header .logout-item:hover {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(239, 68, 68, 0.2) 100%);
    color: #dc2626;
}

/* 扩展页眉交互区域，包含下拉菜单空间 */
.auto-hide-header::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 12px;
    pointer-events: none;
    z-index: 9997;
}

/* 为导航下拉菜单创建保护区域 - 减少触发范围 */
.auto-hide-header .nav-dropdown::after {
    content: '';
    position: absolute;
    top: 80%;
    left: 0;
    right: 0;
    height: 50px;
    pointer-events: auto;
    z-index: 9998;
}

/* 用户下拉菜单使用极小的保护区域，减少意外触发 */
.auto-hide-header .user-dropdown::after {
    content: '';
    position: absolute;
    top: 100%;
    right: 0;
    width: 100%;
    height: 8px;
    pointer-events: auto;
    z-index: 9998;
}

/* 动画定义 */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .auto-hide-header .nav-content {
        padding: 0 1rem;
    }

    .auto-hide-header .nav-center {
        gap: 0.5rem;
    }

    .auto-hide-header .nav-link.modern-link {
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
    }

    .auto-hide-header .modern-dropdown,
    .auto-hide-header .dropdown-content {
        min-width: 180px;
        padding: 0.5rem;
    }

    .auto-hide-header .dropdown-item-modern,
    .auto-hide-header .dropdown-item {
        padding: 0.6rem 0.8rem;
        font-size: 0.85rem;
    }
}