:root {
    --primary-color: #1976d2;
    --secondary-color: #f5f5f5;
    --text-color: #333;
    --sidebar-width: 250px;
    --header-height: 60px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.5;
}

.wrapper {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏样式 */
.sidebar {
    width: var(--sidebar-width);
    background-color: #fff;
    border-right: 1px solid #ddd;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 20px;
    background-color: var(--primary-color);
    color: white;
}

.nav-links {
    list-style: none;
    padding: 20px 0;
}

.nav-links li {
    padding: 10px 20px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.nav-links li:hover {
    background-color: var(--secondary-color);
}

.nav-links li.active {
    background-color: var(--secondary-color);
    border-left: 4px solid var(--primary-color);
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.icon {
    font-size: 1.2em;
}

/* 主要内容区样式 */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
}

.top-bar {
    height: var(--header-height);
    background-color: #fff;
    border-bottom: 1px solid #ddd;
    display: flex;
    align-items: center;
    padding: 0 20px;
    position: fixed;
    top: 0;
    right: 0;
    left: var(--sidebar-width);
    z-index: 100;
}

.toggle-sidebar {
    display: none;
    font-size: 24px;
    cursor: pointer;
    padding: 5px 10px;
}

.search-bar {
    flex: 1;
    margin: 0 20px;
}

.search-bar input {
    width: 100%;
    max-width: 400px;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    outline: none;
}

.search-bar input:focus {
    border-color: var(--primary-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-name {
    font-weight: 500;
}

.logout {
    padding: 6px 12px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.logout:hover {
    background-color: #1565c0;
}

.content {
    padding: 20px;
    margin-top: var(--header-height);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        z-index: 1000;
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .top-bar {
        left: 0;
    }

    .toggle-sidebar {
        display: block;
    }

    .search-bar {
        display: none;
    }
}