/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

/* 导航栏 */
.navbar {
    background-color: #2c3e50;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-title {
    font-size: 1.5rem;
    font-weight: 600;
}

.nav-menu {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav-link:hover {
    background-color: rgba(255,255,255,0.1);
}

/* 主内容区 */
.main-content {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* 按钮样式 */
.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s;
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-secondary {
    background-color: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

.btn-block {
    width: 100%;
}

.btn-danger {
    background-color: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background-color: #c0392b;
}

/* 登录页面 */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 2rem;
}

.login-box {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.login-box h1 {
    margin-bottom: 1rem;
    text-align: center;
}

.login-hint {
    text-align: center;
    color: #666;
    margin-bottom: 1.5rem;
}

/* 表单样式 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.form-group textarea {
    resize: vertical;
}

.form-hint {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: #666;
}

.form-hint code {
    background-color: #f4f4f4;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.85em;
    color: #c7254e;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 1.5rem;
}

.error-message {
    background-color: #fee;
    color: #c33;
    padding: 1rem;
    border-radius: 4px;
    margin-top: 1rem;
}

/* 页面头部 */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-header h2 {
    font-size: 2rem;
}

/* 仪表盘 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.stat-card h3 {
    font-size: 1rem;
    color: #666;
    margin-bottom: 0.5rem;
}

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

.section {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 1.5rem;
}

.section h3 {
    margin-bottom: 1rem;
}

/* 分类树 */
.category-tree {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.category-item {
    padding: 0.75rem;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.category-item:hover {
    background-color: #f9f9f9;
}

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

.category-actions {
    display: flex;
    gap: 0.5rem;
}

.category-children {
    margin-left: 2rem;
    border-left: 2px solid #eee;
    padding-left: 1rem;
}

/* 消息列表 */
.messages-list {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.message-item {
    padding: 1rem;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.message-item:hover {
    background-color: #f9f9f9;
}

.message-info {
    flex: 1;
}

.message-type {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background-color: #ecf0f1;
    border-radius: 4px;
    font-size: 0.875rem;
    margin-right: 0.5rem;
}

.filter-section {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* 按钮配置样式 */
.buttons-list {
    margin-bottom: 1rem;
}

.button-item {
    background: #f9f9f9;
    padding: 1rem;
    margin-bottom: 0.75rem;
    border-radius: 6px;
    border: 1px solid #e0e0e0;
}

.button-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.button-item-title {
    font-weight: 500;
    color: #333;
}

.button-item-actions {
    display: flex;
    gap: 0.5rem;
}

.button-item-row {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: 0.75rem;
    align-items: end;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

.btn-danger-sm {
    background-color: #e74c3c;
    color: white;
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.btn-danger-sm:hover {
    background-color: #c0392b;
}

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

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 2rem;
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.modal-large {
    max-width: 800px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #eee;
}

.close {
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    color: #999;
}

.close:hover {
    color: #333;
}

/* 统计页面 */
.stats-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 2rem;
}

.stats-section {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 1.5rem;
}

.stats-section h3 {
    margin-bottom: 1rem;
}

.popular-list {
    list-style: none;
}

.popular-item {
    padding: 0.75rem;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
        padding: 1rem;
    }
}