/* admin.css */
:root {
    --primary-color: #4361ee;
    --primary-light: #4895ef;
    --primary-dark: #3a0ca3;
    --secondary-color: #3f37c9;
    --success-color: #4cc9f0;
    --danger-color: #f72585;
    --warning-color: #f8961e;
    --info-color: #7209b7;
    --text-primary: #2b2d42;
    --text-secondary: #5e6c84;
    --text-light: #ffffff;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-sidebar: #2b2d42;
    --bg-card: #ffffff;
    --question-bg: rgba(67, 97, 238, 0.08);
    --answer-bg: #f8f9fa;
    --border-color: #e9ecef;
    --code-bg: #f6f8fa;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 999px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    transition: var(--transition-normal);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* 头部样式 */
.admin-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.admin-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path fill="rgba(255,255,255,0.05)" d="M0,0 L100,0 L100,100 L0,100 Z"></path></svg>');
    background-size: cover;
    opacity: 0.3;
}

.header-content {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.header-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.8rem;
    font-weight: 700;
    color: white;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header-title i {
    font-size: 2rem;
    color: white;
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.btn {
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-sm);
    border: none;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
    font-size: 0.9rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

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

.btn-danger:hover {
    background-color: #d11a6b;
    transform: translateY(-2px);
}

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

.btn-success:hover {
    background-color: #3ab0d6;
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid white;
    color: white;
}

.btn-outline:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* 搜索框 */
.search-box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    gap: var(--spacing-md);
}

#searchInput {
    flex: 1;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition-fast);
}

#searchInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.2);
}

.select-all {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* 卡片布局 */
.themes-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.theme-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
    height: 240px;
    display: flex;
    flex-direction: column;
    border-top: 4px solid var(--primary-color);
}

.theme-card[data-session-color] {
    border-top-color: var(--session-color);
    background: linear-gradient(135deg, rgba(var(--session-rgb), 0.1), rgba(var(--session-rgb), 0.05));
}

.theme-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 20px rgba(0,0,0,0.15);
    z-index: 10;
}

@keyframes cardEntrance {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.theme-card {
    animation: cardEntrance 0.8s ease-out;
    animation-fill-mode: backwards;
}

.theme-card:nth-child(1) { animation-delay: 0.1s; }
.theme-card:nth-child(2) { animation-delay: 0.2s; }
.theme-card:nth-child(3) { animation-delay: 0.3s; }
.theme-card:nth-child(4) { animation-delay: 0.4s; }
.theme-card:nth-child(5) { animation-delay: 0.5s; }
.theme-card:nth-child(6) { animation-delay: 0.6s; }
.theme-card:nth-child(7) { animation-delay: 0.7s; }
.theme-card:nth-child(8) { animation-delay: 0.8s; }
.theme-card:nth-child(9) { animation-delay: 0.9s; }
.theme-card:nth-child(10) { animation-delay: 1.0s; }

.theme-header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: var(--spacing-sm);
}

.theme-content {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-size: 0.95rem;
    line-height: 1.6;
    flex-grow: 1;
}

.theme-footer {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: auto;
}

.theme-meta {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    white-space: nowrap;
}

.theme-meta i {
    font-size: 0.7rem;
}

.theme-actions {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    background: rgba(0, 0, 0, 0.5);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    cursor: pointer;
    transition: var(--transition-fast);
    border: none;
}

.action-btn:hover {
    background: var(--danger-color);
    transform: scale(1.1);
}

.record-check {
    cursor: pointer;
}

/* 模态框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--bg-card);
    border-radius: var(--radius-md);
    width: 90%;
    max-width: 900;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    transform: translateY(-20px);
    transition: var(--transition-normal);
    padding: var(--spacing-lg);
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal-body {
    margin-bottom: var(--spacing-md);
}

.question-section, .answer-section {
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
}

.section-content {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    line-height: 1.8;
    font-size: 1rem;
}

/* Markdown 样式 */
.markdown-content {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
}

.markdown-content h1, 
.markdown-content h2, 
.markdown-content h3, 
.markdown-content h4, 
.markdown-content h5, 
.markdown-content h6 {
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    font-weight: 600;
    line-height: 1.25;
}

.markdown-content h1 { font-size: 2em; border-bottom: 1px solid var(--border-color); }
.markdown-content h2 { font-size: 1.5em; border-bottom: 1px solid var(--border-color); }
.markdown-content h3 { font-size: 1.25em; }
.markdown-content h4 { font-size: 1em; }
.markdown-content h5 { font-size: 0.875em; }
.markdown-content h6 { font-size: 0.85em; color: var(--text-secondary); }

.markdown-content p {
    margin-bottom: 1em;
}

.markdown-content ul, 
.markdown-content ol {
    margin-bottom: 1em;
    padding-left: 2em;
}

.markdown-content li {
    margin-bottom: 0.5em;
}

.markdown-content blockquote {
    margin: 0 0 1em 0;
    padding: 0 1em;
    color: var(--text-secondary);
    border-left: 0.25em solid var(--border-color);
}

.markdown-content pre {
    background-color: var(--code-bg);
    border-radius: var(--radius-sm);
    padding: 1em;
    overflow: auto;
    margin-bottom: 1em;
}

.markdown-content code {
    font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
    background-color: var(--code-bg);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
}

.markdown-content pre code {
    padding: 0;
    background-color: transparent;
}

.markdown-content table {
    border-collapse: collapse;
    width: 100%;
    margin-bottom: 1em;
}

.markdown-content table th,
.markdown-content table td {
    padding: 0.5em 1em;
    border: 1px solid var(--border-color);
}

.markdown-content table tr:nth-child(even) {
    background-color: var(--bg-secondary);
}

.markdown-content img {
    max-width: 100%;
    height: auto;
}

/* 登录模态框 */
.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
    color: var(--text-secondary);
}

.form-control {
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.2);
}

.error-message {
    color: var(--danger-color);
    font-size: 0.9rem;
    margin-top: -0.5rem;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl) 0;
    color: var(--text-secondary);
}

/* 分类统计 */
.category-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.category-stat {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    background-color: rgba(var(--primary-rgb), 0.1);
    color: var(--primary-color);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.category-count {
    font-weight: bold;
    background-color: var(--primary-color);
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
}

/* 响应式调整 */
@media (max-width: 1200px) {
    .themes-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 992px) {
    .themes-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .header-actions {
        width: 100%;
        flex-wrap: wrap;
    }
    
    .btn {
        flex: 1;
        justify-content: center;
    }
    
    .themes-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .themes-grid {
        grid-template-columns: 1fr;
    }
}
.meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}

.meta-item {
    padding: 0.5rem;
    background: rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-sm);
}

/* 调整模态框内部间距 */
.modal-body {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.section-title {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* 增强Markdown内容样式 */
.markdown-content h1, 
.markdown-content h2, 
.markdown-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

.markdown-content p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.markdown-content pre {
    background: var(--code-bg);
    padding: 1rem;
    border-radius: var(--radius-sm);
    overflow-x: auto;
}

.markdown-content code {
    font-family: Consolas, Monaco, 'Andale Mono', monospace;
    background: var(--code-bg);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
}

.stats-header {
    background: linear-gradient(135deg, #4361ee, #3a0ca3);
    padding: 1.5rem 0;
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
}

.stats-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path fill="rgba(255,255,255,0.05)" d="M0,0 L100,0 L100,100 L0,100 Z"></path></svg>');
    background-size: cover;
    opacity: 0.3;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.header-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.75rem;
    font-weight: 600;
    color: white;
    margin: 0;
}

.header-title i {
    font-size: 1.5rem;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

/* 按钮样式 */
.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    text-decoration: none;
    font-size: 0.95rem;
}

.btn-home {
    background: rgba(255,255,255,0.1);
    color: white;
    border: 1px solid rgba(255,255,255,0.3);
}

.btn-home:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}

.btn-ai {
    background: #000000;
    color: white;
    border: none;
}

.btn-ai:hover {
    background: #000000;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .header-title {
        font-size: 1.5rem;
    }
    
    .header-actions {
        width: 100%;
    }
    
    .btn {
        flex: 1;
        justify-content: center;
    }
}