/* 全局样式 */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f9fafb;
    color: #333;
}

/* 容器布局 */
.container {
    display: flex;
    height: 100vh;
}

/* 左侧菜单栏 */
.sidebar {
    width: 250px;
    background: #1a0dab;
    color: #fff;
    padding: 20px;
}
.sidebar .logo {
    margin-bottom: 20px;
    text-align: center;
}
.sidebar .menu {
    list-style: none;
    padding: 0;
    margin: 0;
}
.sidebar .menu li {
    margin-bottom: 10px;
}
.sidebar .menu a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    display: flex;
    align-items: center;
}
.sidebar .menu a.active {
    font-weight: bold;
}
.sidebar .menu a i {
    margin-right: 10px;
}

/* 右侧内容区域 */
.content {
    flex-grow: 1;
    padding: 40px;
    background: #fff;
}
.content h1 {
    font-size: 24px;
    font-weight: bold;
    color: #1a0dab;
    margin-bottom: 20px;
}

/* 顶部导航栏 */
.navbar {
    display: flex;
    justify-content: space-between; /* 左右两端对齐 */
    align-items: center; /* 垂直居中对齐 */
    padding: 10px 20px; /* 内边距 */
    background-color: #fff; /* 背景颜色 */
    border-bottom: 1px solid #e4e5e6; /* 底部边框 */
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

/* Logo 样式 */
.navbar .logo img {
    display: block;
    max-height: 50px; /* 限制高度 */
}

/* 登录按钮样式 */
.navbar .login-btn {
    color: #1a0dab;
    text-decoration: none;
    font-size: 16px;
    padding: 8px 12px;
    border: 1px solid #1a0dab;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease, color 0.3s ease;
}
.navbar .login-btn:hover {
    background-color: #1a0dab;
    color: #fff;
}

/* 导航菜单容器样式 */
.nav-menu-container {
    max-width: 600px;
    margin: 20px auto;
    padding: 10px 0;
    border-bottom: 1px solid #e4e5e6;
}

/* 导航菜单整体居中 */
.nav-menu-centered {
    display: flex;
    justify-content: center; /* 整体居中 */
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}
.nav-menu-centered .nav-link {
    color: #1a0dab;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}
.nav-menu-centered .nav-link:hover,
.nav-menu-centered .nav-link.active {
    color: #ffcc00;
}

/* 搜索框区域 */
.search-container {
    max-width: 600px;
    margin: 40px auto;
    text-align: center;
}
.search-box {
    width: calc(100% - 80px);
    padding: 14px 20px;
    border: 1px solid #dfe1e5;
    border-radius: 24px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s ease;
}
.search-box:focus {
    border-color: #1a0dab;
    box-shadow: 0 0 8px rgba(26, 13, 171, 0.2);
}
.search-form {
    display: flex;
    justify-content: center;
}
.search-form button {
    padding: 14px 20px;
    background-color: #1a0dab;
    color: #fff;
    border: none;
    border-radius: 24px;
    cursor: pointer;
    margin-left: -80px; /* 调整按钮与输入框重叠 */
}
.search-form button:hover {
    background-color: #160c8f;
}

/* 表单样式 */
.form-group {
    margin-bottom: 15px;
    text-align: left;
}
.form-group label {
    display: block;
    margin-bottom: 5px;
    font-size: 14px;
    color: #545454;
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #dfe1e5;
    border-radius: 4px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s ease;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #1a0dab;
    box-shadow: 0 0 8px rgba(26, 13, 171, 0.2);
}
.form-group textarea {
    resize: vertical; /* 允许垂直调整大小 */
    min-height: 80px;
}

/* 按钮样式 */
.btn-primary {
    width: 100%;
    padding: 12px;
    background-color: #1a0dab;
    color: #fff;
    font-size: 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}
.btn-primary:hover {
    background-color: #160c8f;
}

/* 提示信息样式 */
.message-box {
    font-size: 14px;
    margin-bottom: 20px;
    padding: 10px;
    border-radius: 4px;
    text-align: center;
}
.message-box.success {
    color: green;
    background-color: #e6f9e6;
    border: 1px solid green;
}
.message-box.error {
    color: red;
    background-color: #ffe6e6;
    border: 1px solid red;
}

/* 资源列表 */
.resource-list {
    max-width: 600px; /* 与搜索框宽度一致 */
    margin: 0 auto; /* 居中对齐 */
    padding: 20px;
}
.resource-item {
    margin-bottom: 20px;
}
.resource-title {
    color: #1a0dab;
    text-decoration: none;
    font-size: 16px;
    font-weight: normal; /* 不加粗 */
}
.resource-title:hover {
    text-decoration: underline;
}
.resource-meta {
    color: #545454;
    font-size: 14px;
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 10px; /* 分类和发布者之间的间距 */
}
.resource-meta .category {
    background-color: #e6f4ff; /* 分类背景色 */
    color: #1a0dab; /* 分类文字颜色 */
    padding: 4px 8px;
    border-radius: 16px; /* 小圆角 */
    font-size: 12px;
}
.resource-meta .publisher {
    background-color: #f0f8ff; /* 发布者背景色 */
    color: #006621; /* 发布者文字颜色 */
    padding: 4px 8px;
    border-radius: 16px; /* 小圆角 */
    font-size: 12px;
}

/* 表格样式 */
.resource-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}
.resource-table th,
.resource-table td {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: left;
}
.resource-table th {
    background-color: #f4f4f4;
    font-weight: bold;
}
.resource-table td.truncate {
    max-width: 300px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 分页导航样式 */
.pagination {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 10px;
}
.pagination a, 
.pagination span {
    padding: 8px 12px;
    background-color: #f0f0f0;
    color: #333;
    text-decoration: none;
    border-radius: 4px;
    font-size: 14px;
}
.pagination a:hover {
    background-color: #1a0dab;
    color: #fff;
}
.pagination .active {
    background-color: #1a0dab;
    color: #fff;
}
.pagination .disabled {
    background-color: #ddd;
    color: #aaa;
    cursor: not-allowed;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: auto;
    }
    .content {
        padding: 20px;
    }
    .search-container {
        margin: 20px auto;
    }
}