:root {
    --color-primary: #0071e3;
    --color-primary-hover: #0077ed;
    --color-bg: #ffffff;
    --color-bg-secondary: #f5f5f7;
    --color-bg-tertiary: #f8fafc;
    --color-text: #1d1d1f;
    --color-text-secondary: #6e6e73;
    --color-border: #d2d2d7;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.1);
    --header-height: 60px;
    --toolbar-height: 50px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", sans-serif;
    color: var(--color-text);
    background-color: var(--color-bg);
    background-image: radial-gradient(circle at 0% 0%, rgba(0, 113, 227, 0.08), transparent 42%);
    overflow: hidden;
}

/* ==================== 顶部工具栏 ==================== */
.editor-header {
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.84);
    backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    gap: 20px;
}

.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--color-text);
    font-weight: 600;
}

.logo img {
    width: 28px;
    height: 28px;
}

.header-center {
    flex: 1;
    max-width: 400px;
}

#docTitle {
    width: 100%;
    padding: 8px 16px;
    border: 1px solid rgba(15, 23, 42, 0.1);
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 8px;
    font-size: 14px;
    outline: none;
}

#docTitle:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.12);
}

.btn-icon {
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    border-radius: 6px;
    color: var(--color-text);
    transition: background-color 0.2s;
}

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

.btn-primary {
    padding: 8px 20px;
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: opacity 0.2s;
    box-shadow: 0 10px 24px rgba(0, 113, 227, 0.24);
}

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

/* ==================== 工具栏 ==================== */
.toolbar {
    height: var(--toolbar-height);
    background-color: rgba(245, 245, 247, 0.86);
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
    display: flex;
    align-items: center;
    padding: 0 20px;
    gap: 8px;
    overflow-x: auto;
}

.toolbar-group {
    display: flex;
    gap: 4px;
}

.toolbar-divider {
    width: 1px;
    height: 24px;
    background-color: var(--color-border);
    margin: 0 8px;
}

.toolbar-btn {
    padding: 6px 12px;
    background: linear-gradient(180deg, #ffffff 0%, var(--color-bg-tertiary) 100%);
    border: 1px solid rgba(15, 23, 42, 0.1);
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toolbar-btn:hover {
    background: #ffffff;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.toolbar-btn svg {
    stroke-width: 2;
}

/* ==================== 编辑器容器 ==================== */
.editor-container {
    display: flex;
    height: calc(100vh - var(--header-height) - var(--toolbar-height));
}

.editor-pane, .preview-pane {
    flex: 1;
    overflow: hidden;
}

.editor-pane {
    border-right: 1px solid var(--color-border);
}

#markdownEditor {
    width: 100%;
    height: 100%;
    padding: 20px;
    border: none;
    outline: none;
    font-family: "Consolas", "Monaco", monospace;
    font-size: 14px;
    line-height: 1.7;
    resize: none;
}

.preview-pane {
    background: linear-gradient(180deg, #eef4ff 0%, #f5f5f7 100%);
    overflow-y: auto;
}

.preview-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
    background: #ffffff;
    border-left: 1px solid rgba(15, 23, 42, 0.08);
    min-height: 100%;
}

/* ==================== Markdown 样式 ==================== */
.preview-content h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-border);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.preview-content h2 {
    font-size: 24px;
    font-weight: 600;
    margin-top: 32px;
    margin-bottom: 12px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--color-border);
}

.preview-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin-top: 24px;
    margin-bottom: 8px;
}

.preview-content p {
    margin-bottom: 16px;
    line-height: 1.7;
}

.preview-content ul, .preview-content ol {
    margin-bottom: 16px;
    padding-left: 24px;
}

.preview-content li {
    margin-bottom: 8px;
}

.preview-content code {
    background-color: #f6f8fa;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}

.preview-content pre {
    background: linear-gradient(135deg, #0f172a 0%, #172554 100%);
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 16px;
}

.preview-content pre code {
    background: none;
    padding: 0;
    color: #c9d1d9;
}

.preview-content img {
    max-width: 100%;
    border-radius: 8px;
    margin: 16px 0;
}

.preview-content blockquote {
    border-left: 4px solid var(--color-primary);
    padding-left: 16px;
    margin: 16px 0;
    color: var(--color-text-secondary);
}

.preview-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
}

.preview-content th, .preview-content td {
    padding: 12px;
    border: 1px solid var(--color-border);
}

.preview-content th {
    background-color: var(--color-bg-secondary);
    font-weight: 600;
}

/* ==================== 配置面板 ==================== */
.config-panel {
    position: fixed;
    right: 0;
    top: calc(var(--header-height) + var(--toolbar-height));
    bottom: 0;
    width: 300px;
    background-color: #ffffff;
    border-left: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: -10px 0 28px rgba(15, 23, 42, 0.08);
    transform: translateX(100%);
    transition: transform 0.3s;
    z-index: 100;
}

.config-panel.active {
    transform: translateX(0);
}

.config-toggle {
    position: absolute;
    left: -40px;
    top: 20px;
    width: 40px;
    height: 40px;
    background: linear-gradient(180deg, #ffffff 0%, var(--color-bg-tertiary) 100%);
    border: 1px solid rgba(15, 23, 42, 0.1);
    border-right: none;
    border-radius: 8px 0 0 8px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    font-size: 10px;
    color: var(--color-text-secondary);
}

.config-content {
    padding: 20px;
    overflow-y: auto;
    height: 100%;
}

.config-content h3 {
    margin-bottom: 20px;
    font-size: 16px;
}

.config-group {
    margin-bottom: 16px;
}

.config-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.config-group input,
.config-group textarea,
.config-group select {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 14px;
    outline: none;
}

.config-group input:focus,
.config-group textarea:focus,
.config-group select:focus {
    border-color: var(--color-primary);
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    .editor-container {
        flex-direction: column;
    }
    
    .editor-pane {
        border-right: none;
        border-bottom: 1px solid var(--color-border);
    }
    
    .preview-pane {
        display: none;
    }
    
    .preview-pane.active {
        display: block;
    }
    
    .config-panel {
        width: 100%;
    }
}