/* ============================================
   markdown.css —— Markdown 编辑器
   ============================================ */

.app-main {
    display: flex;
    flex-direction: column;
    height: 100vh;
    padding-bottom: 34px; /* 状态栏 */
}

/* ===== 布局 ===== */
.md-layout {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    padding: 1rem;
    min-height: 0;
}

.md-layout.view-edit {
    grid-template-columns: 1fr;
}

.md-layout.view-edit .preview-pane {
    display: none;
}

.md-layout.view-preview {
    grid-template-columns: 1fr;
}

.md-layout.view-preview .editor-pane {
    display: none;
}

.md-pane {
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.pane-actions {
    display: flex;
    gap: 0.4rem;
}

/* ===== 语法工具栏 ===== */
.md-toolbar {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 0.4rem 0.6rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    overflow-x: auto;
    scrollbar-width: none;
    flex-shrink: 0;
}

.md-toolbar::-webkit-scrollbar {
    display: none;
}

.tool-btn {
    min-width: 32px;
    height: 30px;
    padding: 0 0.45rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 7px;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.tool-btn:hover {
    background: rgba(37, 99, 235, 0.08);
    color: var(--text-primary);
}

.tool-btn:active {
    transform: scale(0.92);
}

.tool-divider {
    width: 1px;
    height: 18px;
    background: var(--border-color);
    margin: 0 0.25rem;
    flex-shrink: 0;
}

/* ===== 编辑区 ===== */
.md-editor {
    flex: 1;
    width: 100%;
    padding: 1.1rem 1.25rem;
    border: none;
    border-radius: 0;
    background: transparent;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.8;
    resize: none;
    tab-size: 2;
    overflow-y: auto;
}

.md-editor:focus {
    outline: none;
    border: none;
}

.md-editor::placeholder {
    color: var(--text-muted);
}

/* ===== 预览区 ===== */
.md-preview {
    flex: 1;
    padding: 1.5rem 1.75rem;
    overflow-y: auto;
    font-size: 0.95rem;
    line-height: 1.85;
    word-wrap: break-word;
}

/* --- 预览主题：深色 --- */
.md-preview.preview-dark {
    color: #d8d8e4;
    /* 深色预览自带深底，不再依赖页面背景 */
    background: #0f172a;
}

.md-preview.preview-dark h1,
.md-preview.preview-dark h2,
.md-preview.preview-dark h3,
.md-preview.preview-dark h4,
.md-preview.preview-dark h5,
.md-preview.preview-dark h6 {
    color: #fff;
}

.md-preview.preview-dark a {
    color: var(--accent-cyan);
}

.md-preview.preview-dark code {
    background: rgba(37, 99, 235, 0.08);
    color: #e9d5ff;
}

.md-preview.preview-dark pre {
    background: rgba(0, 0, 0, 0.5);
    border-color: var(--border-color);
}

.md-preview.preview-dark blockquote {
    border-left-color: var(--accent-primary);
    background: rgba(37, 99, 235, 0.14);
    color: #cbd5e1;
}

.md-preview.preview-dark th {
    background: rgba(255, 255, 255, 0.05);
}

.md-preview.preview-dark td,
.md-preview.preview-dark th {
    border-color: var(--border-color);
}

.md-preview.preview-dark hr {
    border-color: var(--border-color);
}

/* --- 预览主题：浅色 --- */
.md-preview.preview-light {
    color: #24292f;
    background: #ffffff;
}

.md-preview.preview-light h1,
.md-preview.preview-light h2,
.md-preview.preview-light h3,
.md-preview.preview-light h4,
.md-preview.preview-light h5,
.md-preview.preview-light h6 {
    color: #101828;
}

.md-preview.preview-light a {
    color: #0969da;
}

.md-preview.preview-light code {
    background: rgba(175, 184, 193, 0.25);
    color: #1f2328;
}

.md-preview.preview-light pre {
    background: #f6f8fa;
    border-color: #d0d7de;
}

.md-preview.preview-light pre code {
    background: transparent;
    color: #1f2328;
}

.md-preview.preview-light blockquote {
    border-left-color: #d0d7de;
    background: #f6f8fa;
    color: #57606a;
}

.md-preview.preview-light th {
    background: #f6f8fa;
}

.md-preview.preview-light td,
.md-preview.preview-light th {
    border-color: #d0d7de;
}

.md-preview.preview-light hr {
    border-color: #d0d7de;
}

.md-preview.preview-light .task-check {
    border-color: #d0d7de;
}

/* --- 预览排版通用 --- */
.md-preview > *:first-child {
    margin-top: 0;
}

.md-preview h1,
.md-preview h2,
.md-preview h3,
.md-preview h4,
.md-preview h5,
.md-preview h6 {
    margin: 1.6em 0 0.6em;
    font-weight: 700;
    line-height: 1.3;
    scroll-margin-top: 80px;
}

.md-preview h1 {
    font-size: 1.9em;
    padding-bottom: 0.3em;
    border-bottom: 1px solid currentColor;
    border-color: inherit;
}

.md-preview h2 {
    font-size: 1.5em;
    padding-bottom: 0.25em;
}

.md-preview h3 { font-size: 1.25em; }
.md-preview h4 { font-size: 1.1em; }
.md-preview h5 { font-size: 1em; }
.md-preview h6 { font-size: 0.92em; opacity: 0.85; }

.md-preview p {
    margin: 0.85em 0;
}

.md-preview a {
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast);
}

.md-preview a:hover {
    border-bottom-color: currentColor;
}

.md-preview strong { font-weight: 700; }
.md-preview em { font-style: italic; }
.md-preview del { opacity: 0.6; }

.md-preview ul,
.md-preview ol {
    margin: 0.85em 0;
    padding-left: 1.6em;
}

.md-preview li {
    margin: 0.3em 0;
}

.md-preview li > ul,
.md-preview li > ol {
    margin: 0.3em 0;
}

.md-preview code {
    padding: 0.15em 0.4em;
    border-radius: 5px;
    font-family: var(--font-mono);
    font-size: 0.87em;
}

.md-preview pre {
    position: relative;
    margin: 1.1em 0;
    padding: 1rem 1.1rem;
    border: 1px solid;
    border-radius: 10px;
    overflow-x: auto;
    line-height: 1.6;
}

.md-preview pre code {
    padding: 0;
    background: transparent;
    font-size: 0.85rem;
    white-space: pre;
}

.md-preview pre[data-lang]::before {
    content: attr(data-lang);
    position: absolute;
    top: 0.45rem;
    right: 0.7rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    opacity: 0.45;
}

.md-preview blockquote {
    margin: 1.1em 0;
    padding: 0.6em 1em;
    border-left: 3px solid;
    border-radius: 0 8px 8px 0;
}

.md-preview blockquote > *:first-child { margin-top: 0; }
.md-preview blockquote > *:last-child { margin-bottom: 0; }

.md-preview table {
    margin: 1.2em 0;
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9em;
}

.md-preview th,
.md-preview td {
    padding: 0.5em 0.75em;
    border: 1px solid;
    text-align: left;
}

.md-preview th {
    font-weight: 600;
}

.md-preview hr {
    margin: 1.8em 0;
    border: none;
    border-top: 1px solid;
}

.md-preview img {
    max-width: 100%;
    border-radius: 8px;
    margin: 0.5em 0;
}

/* 任务列表 */
.md-preview li.task-item {
    list-style: none;
    margin-left: -1.35em;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.task-check {
    flex-shrink: 0;
    width: 15px;
    height: 15px;
    margin-top: 0.35em;
    border: 1.5px solid var(--text-muted);
    border-radius: 4px;
    display: inline-block;
    position: relative;
}

.task-check.checked {
    background: var(--accent-green);
    border-color: var(--accent-green);
}

.task-check.checked::after {
    content: '';
    position: absolute;
    left: 4px;
    top: 1px;
    width: 4px;
    height: 8px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.md-preview li.task-item.done {
    opacity: 0.55;
    text-decoration: line-through;
}

/* ===== 底部状态栏 ===== */
.status-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0 1.25rem;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    z-index: 90;
}

.status-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 0;
}

.status-item b {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    font-weight: 500;
}

.status-item.muted {
    opacity: 0.6;
}

.status-item.saving {
    color: var(--accent-orange);
}

.status-item.saved {
    color: var(--accent-green);
}

/* ===== 导出下拉菜单 ===== */
.dropdown {
    position: fixed;
    top: 58px;
    right: 1.25rem;
    min-width: 210px;
    padding: 0.35rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(16px);
    z-index: 200;
    display: none;
    flex-direction: column;
    gap: 2px;
}

.dropdown.show {
    display: flex;
    animation: toastIn 0.18s ease;
}

.dropdown-item {
    padding: 0.55rem 0.75rem;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.84rem;
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background: rgba(37, 99, 235, 0.08);
    color: var(--text-primary);
}

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

    .md-layout.view-edit,
    .md-layout.view-preview {
        grid-template-rows: 1fr;
    }
}

@media (max-width: 768px) {
    .md-layout {
        padding: 0.6rem;
        gap: 0.6rem;
    }

    .md-editor {
        font-size: 0.82rem;
        padding: 0.85rem;
    }

    .md-preview {
        padding: 1rem;
        font-size: 0.9rem;
    }

    .status-bar {
        padding: 0 0.75rem;
        font-size: 0.7rem;
    }

    .status-group {
        gap: 0.6rem;
    }

    .status-item.muted {
        display: none;
    }
}