/* index.css - 仅用于图书管理系统首页/仪表板 */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

body {
    background-color: #f5f7fa;
    color: #333;
    font-size: 16px;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: #4a89dc;
}

ul {
    list-style: none;
}

/* 应用容器 */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* 侧边导航栏 */
.sidebar {
    width: 250px;
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 20px 0;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.logo-container {
    padding: 0 20px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo {
    width: 60px;
    height: auto;
    margin-bottom: 10px;
}

.logo-container h2 {
    font-size: 1.2rem;
    margin: 10px 0;
    color: #ecf0f1;
    font-weight: 500;
}

.nav-links li {
    margin-bottom: 5px;
}

.nav-links li a {
    padding: 10px 20px;
    display: flex;
    align-items: center;
    color: #bdc3c7;
    transition: all 0.3s ease;
}

.nav-links li a i {
    margin-right: 10px;
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

.nav-links li a:hover, .nav-links li.active a {
    background-color: #34495e;
    color: #ecf0f1;
    border-left: 3px solid #4a89dc;
}

.nav-category {
    padding: 10px 20px;
    font-size: 0.85rem;
    text-transform: uppercase;
    color: #7f8c8d;
    margin-top: 15px;
    margin-bottom: 5px;
}

/* 主内容区 */
.main-content {
    flex: 1;
    margin-left: 250px;
    padding: 20px;
}

/* 顶部导航栏 */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}

.search-container {
    position: relative;
    width: 300px;
}

.search-input {
    padding: 10px 15px 10px 40px;
    width: 100%;
    border: 1px solid #e1e4e8;
    border-radius: 20px;
    font-size: 14px;
    transition: all 0.3s ease;
}

.search-input:focus {
    border-color: #4a89dc;
    box-shadow: 0 0 0 3px rgba(74, 137, 220, 0.1);
    outline: none;
}

.search-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #8492a6;
}

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

.notifications {
    margin-right: 20px;
    position: relative;
    cursor: pointer;
}

.notifications i {
    font-size: 1.2rem;
    color: #606266;
}

.badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background-color: #f56c6c;
    color: white;
    font-size: 0.7rem;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-info {
    display: flex;
    align-items: center;
    position: relative;
    cursor: pointer;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #4a89dc;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-right: 10px;
    font-size: 1.2rem;
}

.user-details {
    display: flex;
    flex-direction: column;
}

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

.user-role {
    font-size: 0.8rem;
    color: #8492a6;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: white;
    border-radius: 4px;
    box-shadow: 0 2px 12px 0 rgba(0,0,0,0.1);
    padding: 10px 0;
    min-width: 150px;
    display: none;
    z-index: 10;
}

.user-info.active .dropdown-menu {
    display: block;
}

.dropdown-menu a {
    display: block;
    padding: 8px 15px;
    color: #606266;
    transition: all 0.3s ease;
}

.dropdown-menu a:hover {
    background-color: #f5f7fa;
}

.dropdown-menu a i {
    margin-right: 8px;
    width: 16px;
    text-align: center;
}

/* 欢迎区域 */
.welcome-section {
    background: linear-gradient(to right, #4a89dc, #5d9cec);
    color: white;
    padding: 30px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.welcome-section h1 {
    font-size: 1.8rem;
    margin-bottom: 5px;
}

.welcome-section p {
    font-size: 1rem;
    opacity: 0.9;
}

/* 统计卡片样式 */
.stats-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    padding: 20px;
    display: flex;
    align-items: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.stat-icon {
    font-size: 2rem;
    color: #4a89dc;
    margin-right: 15px;
    width: 40px;
    text-align: center;
}

.stat-info h3 {
    font-size: 0.9rem;
    color: #606266;
    margin-bottom: 5px;
}

.stat-number {
    font-size: 1.8rem;
    font-weight: 600;
    color: #2c3e50;
}

/* 主要内容区域 */
.main-sections {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.content-section {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    padding: 20px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #edf2f7;
}

.section-header h2 {
    font-size: 1.2rem;
    color: #2c3e50;
}

.view-all {
    font-size: 0.85rem;
    color: #4a89dc;
    display: flex;
    align-items: center;
}

.view-all i {
    margin-left: 5px;
    transition: transform 0.3s ease;
}

.view-all:hover i {
    transform: translateX(3px);
}

/* 图书卡片样式 */
.book-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.book-card {
    display: flex;
    border: 1px solid #edf2f7;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.book-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.book-cover {
    width: 100px;
    height: 140px;
    min-width: 100px;
    background-color: #f5f7fa;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-info {
    padding: 15px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.book-title {
    font-size: 1rem;
    margin-bottom: 5px;
    color: #2c3e50;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-author {
    font-size: 0.85rem;
    color: #606266;
    margin-bottom: 10px;
}

.book-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
}

.book-category {
    background-color: #e5f1ff;
    color: #4a89dc;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
}

.book-status {
    font-size: 0.75rem;
    font-weight: 500;
}

.book-status.available {
    color: #67c23a;
}

.book-status.borrowed {
    color: #e6a23c;
}

.borrow-btn {
    background-color: #4a89dc;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    margin-top: auto;
    transition: background-color 0.3s ease;
}

.borrow-btn:hover {
    background-color: #357bc8;
}

/* 通知公告样式 */
.notice-item {
    display: flex;
    padding: 15px 0;
    border-bottom: 1px solid #edf2f7;
}

.notice-item:last-child {
    border-bottom: none;
}

.notice-icon {
    font-size: 1.5rem;
    color: #4a89dc;
    margin-right: 15px;
    display: flex;
    align-items: flex-start;
    padding-top: 5px;
}

.notice-content h3 {
    font-size: 1rem;
    color: #2c3e50;
    margin-bottom: 5px;
}

.notice-content p {
    font-size: 0.9rem;
    color: #606266;
    margin-bottom: 10px;
}

.notice-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.notice-time {
    font-size: 0.8rem;
    color: #8492a6;
}

.renew-btn {
    background-color: #ecf5ff;
    color: #4a89dc;
    border: 1px solid #d9ecff;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.renew-btn:hover {
    background-color: #4a89dc;
    color: white;
    border-color: #4a89dc;
}

/* 热门图书区域 */
.popular-section {
    margin-top: 20px;
}

.popular-books {
    display: flex;
    overflow-x: auto;
    gap: 15px;
    padding-bottom: 10px;
}

.popular-book-item {
    display: flex;
    background-color: #f8fafc;
    border-radius: 8px;
    padding: 15px;
    min-width: 280px;
    position: relative;
}

.rank-badge {
    position: absolute;
    top: -10px;
    left: 10px;
    background-color: #4a89dc;
    color: white;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 0.8rem;
    font-weight: bold;
}

.book-cover.small {
    width: 60px;
    height: 90px;
    min-width: 60px;
    margin-right: 15px;
}

.book-details {
    flex: 1;
}

.book-stats {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-top: 10px;
}

.book-stats span {
    font-size: 0.8rem;
    color: #8492a6;
}

.book-stats i {
    margin-right: 5px;
}

/* 响应式调整 */
@media (max-width: 1200px) {
    .stats-container {
        grid-template-columns: repeat(2, 1fr);
    }

    .main-sections {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 70px;
        overflow: hidden;
    }

    .logo-container {
        padding: 10px;
    }

    .logo-container h2 {
        display: none;
    }

    .nav-links li a span {
        display: none;
    }

    .nav-links li a i {
        margin-right: 0;
    }

    .nav-category {
        display: none;
    }

    .main-content {
        margin-left: 70px;
    }

    .search-container {
        width: 180px;
    }

    .book-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .stats-container {
        grid-template-columns: 1fr;
    }

    .top-bar {
        flex-direction: column;
        gap: 15px;
    }

    .search-container {
        width: 100%;
    }

    .user-details {
        display: none;
    }
}