/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --border-color: #e5e7eb;
    --bg-color: #f9fafb;
    --white: #ffffff;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部导航 */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.header h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.header h1 i {
    margin-right: 8px;
}

.header nav {
    display: flex;
    gap: 1.5rem;
}

.header nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.3s;
}

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

.header nav a.active {
    background-color: var(--primary-color);
    color: var(--white);
}

/* 主内容区 */
.main-content {
    padding: 2rem 20px;
    min-height: calc(100vh - 200px);
}

/* 搜索和筛选 */
.filter-section {
    background-color: var(--white);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.search-box {
    position: relative;
    margin-bottom: 1rem;
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95rem;
    transition: all 0.3s;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.filter-controls {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-controls select {
    flex: 1;
    min-width: 150px;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95rem;
    background-color: var(--white);
    cursor: pointer;
    transition: all 0.3s;
}

.filter-controls select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* 博客列表 */
.blog-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.blog-card {
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 1.5rem;
    transition: all 0.3s;
    cursor: pointer;
    border: 2px solid transparent;
}

.blog-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.blog-card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
}

.blog-card h3 {
    font-size: 1.25rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.blog-status {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.blog-status.published {
    background-color: #d1fae5;
    color: #065f46;
}

.blog-status.draft {
    background-color: #fef3c7;
    color: #92400e;
}

.blog-meta {
    display: flex;
    gap: 1rem;
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.blog-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.blog-meta i {
    font-size: 0.875rem;
}

.blog-content-preview {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.blog-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--bg-color);
    color: var(--primary-color);
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.blog-category {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin: 2rem 0;
}

.pagination button {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background-color: var(--white);
    color: var(--text-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 500;
}

.pagination button:hover:not(:disabled) {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination button.active {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.pagination-info {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* 加载和空状态 */
.loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
    font-size: 1.1rem;
}

.loading i {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

.empty-state p {
    font-size: 1.1rem;
}

/* 管理页面布局 */
.admin-layout {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 2rem;
    align-items: start;
}

.admin-list {
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 1.5rem;
    position: sticky;
    top: 80px;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.admin-header h2 {
    font-size: 1.25rem;
    color: var(--text-color);
}

.admin-blog-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
}

.admin-blog-item {
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
}

.admin-blog-item:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-color);
}

.admin-blog-item.active {
    border-color: var(--primary-color);
    background-color: #eff6ff;
}

.admin-blog-item h4 {
    font-size: 0.95rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.admin-blog-item .blog-meta {
    margin: 0;
}

/* 编辑器 */
.admin-editor {
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 2rem;
}

.editor-placeholder {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-light);
}

.editor-placeholder i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

.editor-placeholder p {
    font-size: 1.1rem;
}

/* 表单样式 */
.blog-form h2 {
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-color);
}

.form-group .required {
    color: var(--danger-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95rem;
    font-family: inherit;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 200px;
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: var(--text-light);
    font-size: 0.875rem;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background-color: var(--bg-color);
    color: var(--text-color);
}

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

.btn-danger {
    background-color: var(--danger-color);
    color: var(--white);
}

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

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    max-width: 400px;
    width: 90%;
    box-shadow: var(--shadow-lg);
}

.modal-content h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-content h3 i {
    color: var(--warning-color);
}

.modal-content p {
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* 页脚 */
.footer {
    background-color: var(--white);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 3rem;
    text-align: center;
    color: var(--text-light);
}

/* 响应式设计 */
@media (max-width: 968px) {
    .admin-layout {
        grid-template-columns: 1fr;
    }

    .admin-list {
        position: relative;
        top: 0;
        max-height: none;
    }

    .blog-list {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .header .container {
        flex-direction: column;
        gap: 1rem;
    }

    .filter-controls {
        flex-direction: column;
    }

    .filter-controls select {
        width: 100%;
    }

    .pagination {
        flex-wrap: wrap;
    }
}