/*主页*/
.user-nav-container {
    background-color: var(--bg-color-panel);
    border-bottom: 1px solid var(--border-color-panel);
    padding: 5px 0;
}
.user-nav {
    display: flex;
    justify-content: flex-end;
}
.user-nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}
.user-nav-item {
    margin: 0 5px;
}
.user-nav-item a {
    display: flex;
    align-items: center;
    color: var(--font-color-link);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.3s;
}
.user-nav-item a:hover {
    color: var(--font-color-hover);
}
@media (min-width: 768px) {
    .user-nav-item {
        margin: 0 15px;
    }
    .user-nav-item .glyphicon {
        margin-right: 5px;
    }
    .user-nav-item a {
        padding: 3px 8px;
    }
}
@media (max-width: 767px) {
    .user-nav {
        justify-content: center;
    }
    .user-nav-list {
        flex-wrap: wrap;
    }
    .nav-text {
        display: none;
    }
    .user-nav-item .glyphicon {
        margin-right: 0;
        font-size: 14px;
    }
    .user-nav-item a {
        padding: 5px;
    }
}

/*书架*/
.bookshelf-container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 15px;
}
.bookshelf-header {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color-panel);
}
.bookshelf-header h2 {
    color: var(--font-color-link);
    margin: 0;
    font-size: 24px;
}
.bookshelf-empty {
    text-align: center;
    padding: 50px 20px;
    color: #999;
}
.bookshelf-empty .glyphicon {
    font-size: 48px;
    margin-bottom: 15px;
    color: #ddd;
}
.bookshelf-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 20px;
    margin-top: 20px;
}
@media (min-width: 768px) {
    .bookshelf-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
        gap: 30px;
    }
}
.book-item {
    background: var(--bg-color-panel);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-panel);
    border: 1px solid var(--border-color-panel);
    overflow: hidden;
    transition: transform 0.2s;
    text-align: center;
}
.book-item:hover {
    transform: translateY(-5px);
}
.book-cover {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background-color: #f5f5f5;
}
.book-info {
    padding: 15px;
}
.book-title {
    margin: 0 0 8px 0;
    font-size: 15px;
    font-weight: bold;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.book-author {
    font-size: 13px;
    color: #666;
    margin-bottom: 12px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.book-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 15px 15px;
}
.remove-book {
    color: #ff6b6b;
    cursor: pointer;
    font-size: 14px;
}
.remove-book:hover {
    color: #ff0000;
}
@media (max-width: 767px) {
    .bookshelf-container {
        margin: 10px auto;
        padding: 0 10px;
    }
    .bookshelf-header h2 {
        font-size: 20px;
        text-align: center;
    }
    .bookshelf-grid {
        grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
        gap: 15px;
    }
    .book-cover {
        height: 150px;
    }
    .book-info {
        padding: 10px;
    }
    .book-title {
        font-size: 13px;
        margin: 0 0 5px 0;
    }
    .book-author {
        font-size: 11px;
        margin-bottom: 8px;
    }
    .book-actions {
        padding: 0 10px 10px;
    }
    .read-link, .remove-book {
        font-size: 12px;
    }
    .bookshelf-empty {
        padding: 30px 10px;
    }
    .bookshelf-empty .glyphicon {
        font-size: 36px;
    }
    .bookshelf-empty h4 {
        font-size: 16px;
    }
    .bookshelf-empty p {
        font-size: 14px;
    }
}