/* 导航栏组件样式 */
.navbar {
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    padding: 0 var(--spacing-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
}

.nav-brand i {
    margin-right: var(--spacing-sm);
    color: var(--primary-color);
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 0;
}

.nav-item {
    margin: 0 var(--spacing-md);
    position: relative;
}

.nav-item a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 16px;
    font-weight: 600; /* 固定字重，避免切换时重排抖动 */
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    transition: color 0.2s ease, background-color 0.2s ease;
    display: flex;
    align-items: center;
    line-height: 1; /* 稳定行高 */
}

.nav-item a i {
    margin-right: var(--spacing-xs);
    font-size: 14px;
}

.nav-item a:hover {
    color: var(--primary-color);
    background-color: var(--bg-hover);
}

.nav-item.active a {
    color: var(--primary-color);
    background-color: rgba(30, 136, 229, 0.1);
    font-weight: 600;
}

.nav-item a::after {
    content: '';
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: -6px;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 2px;
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.2s ease;
}
.nav-item.active a::after,
.nav-item a:hover::after {
    transform: scaleX(1);
}

/* 导航操作区域样式 */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-name {
    font-weight: 500;
    color: var(--text-primary);
}

.profile-link {
    display: flex;
    align-items: center;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 14px;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: background-color 0.3s ease;
}

.profile-link:hover {
    background-color: var(--bg-hover);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-primary);
    border: none;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 13px;
    transition: background-color 0.3s ease;
}

.btn-secondary:hover {
    background-color: var(--border-color);
}

.nav-item a:hover {
    color: #3498db;
    background-color: #f5f7fa;
}

.nav-item.active a {
    color: #3498db;
    background-color: #e8f4fd;
}

.nav-item a::after {
    content: '';
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: -6px;
    height: 2px;
    background-color: #3498db;
    border-radius: 2px;
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.2s ease;
}
.nav-item.active a::after,
.nav-item a:hover::after {
    transform: scaleX(1);
}

.navbar-user {
    display: flex;
    align-items: center;
}

.user-info {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 8px 12px;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.user-info:hover {
    background-color: #f5f7fa;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: #3498db;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    margin-right: 8px;
}

.user-name {
    font-size: 14px;
    font-weight: 500;
    color: #333;
}

.navbar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #333;
    cursor: pointer;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .navbar-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background-color: white;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        padding: 15px 0;
    }
    
    .navbar-menu.active {
        display: flex;
    }
    
    .nav-item {
        margin: 5px 0;
        text-align: center;
    }
    
    .nav-item a {
        justify-content: center;
        padding: 10px 15px;
    }
    
    .nav-item.active a::after {
        bottom: 5px;
    }
    
    .navbar-toggle {
        display: block;
    }
}

@media (max-width: 768px) {
    .navbar-container {
        padding: 0 15px;
    }
    
    .navbar-logo {
        font-size: 1.2rem;
    }
    
    .user-info {
        padding: 6px 10px;
    }
    
    .user-avatar {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }
    
    .user-name {
        display: none;
    }
}

@media (max-width: 480px) {
    .navbar {
        padding: 0 10px;
    }
    
    .navbar-logo {
        font-size: 1.1rem;
    }
    
    .navbar-logo i {
        margin-right: 5px;
    }
}

/* 动画效果 */
.nav-item {
    transition: transform 0.2s ease;
}

.nav-item:hover {
    transform: translateY(-1px);
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    .navbar {
        background-color: #1e293b;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    }
    
    .navbar-logo {
        color: #e2e8f0;
    }
    
    .nav-item a {
        color: #cbd5e1;
    }
    
    .nav-item a:hover {
        color: #38bdf8;
        background-color: #334155;
    }
    
    .nav-item.active a {
        color: #38bdf8;
        background-color: #0e7490;
    }
    
    .user-info {
        color: #cbd5e1;
    }
    
    .user-info:hover {
        background-color: #334155;
    }
    
    .user-name {
        color: #cbd5e1;
    }
    
    .navbar-menu.active {
        background-color: #1e293b;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    }
}