/* ==================== Markdown 编辑器样式 ==================== */

/* 页面整体布局 */
.md-page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.md-page .navbar {
    position: relative;
}

.md-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: calc(100vh - var(--navbar-height));
    overflow: hidden;
}

/* ==================== 工具栏 ==================== */
.md-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 16px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    gap: 8px;
    min-height: 44px;
    flex-shrink: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.md-toolbar::-webkit-scrollbar {
    height: 0;
}

.md-toolbar-left,
.md-toolbar-right {
    display: flex;
    align-items: center;
    gap: 2px;
    flex-shrink: 0;
}

.md-tool-sep {
    width: 1px;
    height: 20px;
    background: var(--border);
    margin: 0 4px;
    flex-shrink: 0;
}

.md-tool-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    flex-shrink: 0;
    position: relative;
}

.md-tool-btn:hover {
    background: rgba(79, 142, 247, 0.12);
    color: var(--text-primary);
}

.md-tool-btn:active {
    background: rgba(79, 142, 247, 0.2);
    transform: scale(0.95);
}

.md-tool-btn.active {
    background: rgba(79, 142, 247, 0.2);
    color: var(--primary);
}

/* 工具提示 */
.md-tool-btn::after {
    content: attr(title);
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-dark);
    color: var(--text-primary);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-fast);
    border: 1px solid var(--border);
    z-index: 100;
}

.md-tool-btn:hover::after {
    opacity: 1;
}

/* ==================== 主体区域 ==================== */
.md-body {
    flex: 1;
    display: flex;
    overflow: hidden;
    position: relative;
}

.md-editor-pane,
.md-preview-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    max-width: 100%;
}

.md-editor-pane {
    flex: 0 0 calc(50% - 2px);
}

.md-preview-pane {
    flex: 1;
}

/* 面板标题栏 */
.md-pane-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 0.3px;
    flex-shrink: 0;
    min-height: 36px;
}

.md-preview-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.md-pane-info {
    font-size: 11px;
    color: var(--text-secondary);
    opacity: 0.7;
}

.md-pane-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.md-pane-btn:hover {
    background: rgba(79, 142, 247, 0.12);
    color: var(--text-primary);
}

.md-pane-btn.active {
    background: rgba(79, 142, 247, 0.2);
    color: var(--primary);
}

/* ==================== 编辑区 ==================== */
.md-input {
    flex: 1;
    width: 100%;
    padding: 20px;
    background: var(--bg-dark);
    color: var(--text-primary);
    border: none;
    resize: none;
    font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    line-height: 1.75;
    outline: none;
    tab-size: 4;
    overflow-y: auto;
    -webkit-font-smoothing: antialiased;
}

.md-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.4;
}

.md-input::-webkit-scrollbar {
    width: 8px;
}

.md-input::-webkit-scrollbar-track {
    background: transparent;
}

.md-input::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.md-input::-webkit-scrollbar-thumb:hover {
    background: #4a5568;
}

/* ==================== 拖拽分隔条 ==================== */
.md-resizer {
    width: 4px;
    background: var(--border);
    cursor: col-resize;
    transition: background var(--transition-fast);
    flex-shrink: 0;
    position: relative;
    z-index: 10;
}

.md-resizer:hover,
.md-resizer.resizing {
    background: var(--primary);
}

.md-resizer::after {
    content: '';
    position: absolute;
    left: -4px;
    right: -4px;
    top: 0;
    bottom: 0;
}

/* ==================== 预览区 ==================== */
.md-preview {
    flex: 1;
    padding: 20px 28px;
    background: var(--bg-dark);
    overflow-y: auto;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.md-preview::-webkit-scrollbar {
    width: 8px;
}

.md-preview::-webkit-scrollbar-track {
    background: transparent;
}

.md-preview::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.md-preview::-webkit-scrollbar-thumb:hover {
    background: #4a5568;
}

/* ==================== Markdown 渲染内容样式 ==================== */
.md-preview h1 {
    font-size: 2em;
    font-weight: 700;
    margin: 0 0 0.5em;
    padding-bottom: 0.3em;
    border-bottom: 2px solid var(--border);
    color: var(--text-primary);
    line-height: 1.3;
}

.md-preview h2 {
    font-size: 1.6em;
    font-weight: 700;
    margin: 1.2em 0 0.5em;
    padding-bottom: 0.25em;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    line-height: 1.35;
}

.md-preview h3 {
    font-size: 1.3em;
    font-weight: 600;
    margin: 1em 0 0.4em;
    color: var(--text-primary);
    line-height: 1.4;
}

.md-preview h4 {
    font-size: 1.1em;
    font-weight: 600;
    margin: 0.8em 0 0.3em;
    color: var(--text-primary);
}

.md-preview h5,
.md-preview h6 {
    font-size: 1em;
    font-weight: 600;
    margin: 0.6em 0 0.2em;
    color: var(--text-secondary);
}

.md-preview p {
    margin: 0.6em 0;
    line-height: 1.75;
    color: var(--text-primary);
}

.md-preview strong {
    font-weight: 700;
    color: #fff;
}

.md-preview em {
    font-style: italic;
    color: #c9d1d9;
}

.md-preview del {
    text-decoration: line-through;
    opacity: 0.6;
}

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

.md-preview a:hover {
    border-bottom-color: var(--primary);
}

/* 列表 */
.md-preview ul,
.md-preview ol {
    padding-left: 1.8em;
    margin: 0.5em 0;
    color: var(--text-primary);
}

.md-preview li {
    margin: 0.25em 0;
    line-height: 1.7;
}

.md-preview li::marker {
    color: var(--text-secondary);
}

.md-preview ul ul,
.md-preview ol ol,
.md-preview ul ol,
.md-preview ol ul {
    margin: 0.1em 0;
}

/* 行内代码 */
.md-preview code:not(pre code) {
    background: rgba(110, 118, 129, 0.2);
    color: #ffa657;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    font-size: 0.9em;
}

/* 代码块 */
.md-preview pre {
    background: #161B22;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin: 1em 0;
    overflow-x: auto;
    position: relative;
}

.md-preview pre code {
    background: none;
    color: #e6edf3;
    padding: 0;
    border-radius: 0;
    font-size: 13px;
    line-height: 1.65;
    font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
}

.md-preview pre::-webkit-scrollbar {
    height: 6px;
}

.md-preview pre::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

/* 引用 */
.md-preview blockquote {
    border-left: 4px solid var(--primary);
    padding: 8px 16px;
    margin: 1em 0;
    background: rgba(79, 142, 247, 0.05);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
}

.md-preview blockquote p {
    margin: 0.3em 0;
    color: inherit;
}

.md-preview blockquote strong {
    color: var(--text-primary);
}

/* 表格 */
.md-preview table {
    width: 100%;
    border-collapse: collapse;
    margin: 1em 0;
    font-size: 0.95em;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.md-preview thead {
    background: var(--bg-card);
}

.md-preview th {
    padding: 10px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}

.md-preview td {
    padding: 9px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}

.md-preview tbody tr:hover {
    background: rgba(79, 142, 247, 0.04);
}

.md-preview tbody tr:last-child td {
    border-bottom: none;
}

/* 分割线 */
.md-preview hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 1.5em 0;
}

/* 图片 */
.md-preview img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    margin: 0.5em 0;
}

/* 任务列表 */
.md-preview input[type="checkbox"] {
    margin-right: 0.5em;
    accent-color: var(--primary);
    transform: scale(1.1);
}

.md-preview ul:has(input[type="checkbox"]) {
    list-style: none;
    padding-left: 0;
}

.md-preview ul:has(input[type="checkbox"]) li {
    list-style: none;
}

/* ==================== Toast 提示 ==================== */
.md-toast-container {
    position: fixed;
    top: calc(var(--navbar-height) + 16px);
    right: 16px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.md-toast {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    box-shadow: var(--shadow-md);
    animation: mdToastIn 0.3s ease;
    max-width: 360px;
    word-break: break-word;
}

.md-toast.success {
    border-left: 3px solid #3fb950;
}

.md-toast.error {
    border-left: 3px solid #f85149;
}

.md-toast.info {
    border-left: 3px solid var(--primary);
}

.md-toast.hide {
    animation: mdToastOut 0.3s ease forwards;
}

@keyframes mdToastIn {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes mdToastOut {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(30px); }
}

/* ==================== 文件操作下拉菜单 ==================== */
.md-dropdown {
    position: fixed;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    padding: 4px 0;
    min-width: 180px;
    z-index: 1000;
    display: none;
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.md-dropdown.show {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.md-dropdown-item {
    display: block;
    width: 100%;
    text-align: left;
    padding: 10px 16px;
    font-size: 13px;
    color: var(--text-primary);
    transition: background var(--transition-fast);
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

.md-dropdown-item:hover {
    background: rgba(79, 142, 247, 0.1);
}

/* ==================== 响应式设计 ==================== */

/* 小于 1024px：编辑器占 45% */
@media (max-width: 1024px) {
    .md-editor-pane {
        flex: 0 0 45%;
    }

    .md-preview {
        padding: 16px 20px;
    }

    .md-input {
        padding: 16px;
        font-size: 13px;
    }

    .md-toolbar {
        padding: 4px 10px;
        gap: 2px;
    }

    .md-tool-btn {
        width: 30px;
        height: 30px;
    }
}

/* 移动端：隐藏工具栏 tooltip（触摸屏没有 hover） */
@media (hover: none) and (pointer: coarse) {
    .md-tool-btn::after {
        display: none !important;
    }
}

/* ----- 小于 768px：上下布局 ----- */
@media (max-width: 768px) {
    .md-body {
        flex-direction: column;
    }

    .md-editor-pane,
    .md-preview-pane {
        flex: none;
        width: 100%;
    }

    .md-editor-pane {
        min-height: 180px;
        max-height: 42vh;
    }

    .md-preview-pane {
        flex: 1;
        min-height: 180px;
    }

    .md-resizer {
        width: 100%;
        height: 4px;
        cursor: row-resize;
    }

    .md-resizer::after {
        left: 0;
        right: 0;
        top: -6px;
        bottom: -6px;
    }

    /* 工具栏：紧凑水平滚动 */
    .md-toolbar {
        flex-wrap: nowrap;
        gap: 1px;
        padding: 3px 6px;
        min-height: 38px;
    }

    .md-tool-sep {
        margin: 0 2px;
        height: 16px;
    }

    .md-tool-btn {
        width: 30px;
        height: 30px;
    }

    .md-tool-btn svg {
        width: 15px;
        height: 15px;
    }

    /* 隐藏低频按钮 */
    .md-tool-btn[data-action="strikethrough"],
    .md-tool-btn[data-action="hr"],
    .md-tool-btn[data-action="table"],
    .md-tool-sep:nth-of-type(3),
    .md-tool-sep:nth-of-type(4) {
        display: none;
    }

    /* 面板标题栏 */
    .md-pane-header {
        padding: 6px 12px;
        font-size: 11px;
        min-height: 30px;
    }

    .md-pane-info {
        font-size: 10px;
        display: none;
    }

    .md-pane-btn {
        width: 26px;
        height: 26px;
    }

    /* 预览区：缩小标题 */
    .md-preview h1 { font-size: 1.35em; margin-bottom: 0.3em; padding-bottom: 0.2em; }
    .md-preview h2 { font-size: 1.15em; margin: 0.8em 0 0.35em; padding-bottom: 0.15em; }
    .md-preview h3 { font-size: 1.05em; margin: 0.6em 0 0.25em; }
    .md-preview h4 { font-size: 0.95em; margin: 0.5em 0 0.2em; }
    .md-preview h5, .md-preview h6 { font-size: 0.9em; }

    .md-preview p {
        margin: 0.4em 0;
        line-height: 1.6;
        font-size: 0.93em;
    }

    .md-preview ul, .md-preview ol {
        padding-left: 1.4em;
        margin: 0.3em 0;
    }

    .md-preview li {
        margin: 0.15em 0;
        line-height: 1.5;
        font-size: 0.93em;
    }

    .md-preview pre {
        padding: 10px;
        margin: 0.6em 0;
    }

    .md-preview pre code {
        font-size: 11px;
        line-height: 1.5;
    }

    .md-preview code:not(pre code) {
        font-size: 0.85em;
        padding: 1px 5px;
    }

    .md-preview blockquote {
        padding: 6px 12px;
        margin: 0.6em 0;
        border-left-width: 3px;
    }

    .md-preview table {
        font-size: 0.82em;
    }

    .md-preview th, .md-preview td {
        padding: 6px 8px;
    }

    .md-preview hr {
        margin: 0.8em 0;
    }

    .md-input {
        padding: 10px 12px;
        font-size: 13px;
        line-height: 1.6;
    }

    .md-preview {
        padding: 10px 14px;
    }

    /* Toast：移动端底部显示 */
    .md-toast-container {
        top: auto;
        bottom: 16px;
        right: 8px;
        left: 8px;
    }

    .md-toast {
        max-width: none;
        font-size: 12px;
        padding: 8px 14px;
    }

    /* 文件下拉菜单 */
    .md-dropdown {
        min-width: 150px;
    }

    .md-dropdown-item {
        padding: 10px 14px;
        font-size: 13px;
    }
}

/* ----- 小于 480px：手机端紧凑布局 ----- */
@media (max-width: 480px) {
    :root {
        --navbar-height: 56px;
    }

    .md-main {
        height: calc(100vh - var(--navbar-height));
    }

    .md-body {
        flex-direction: column;
    }

    .md-editor-pane {
        min-height: 140px;
        max-height: 38vh;
    }

    .md-preview-pane {
        min-height: 150px;
    }

    /* 超紧凑工具栏 */
    .md-toolbar {
        gap: 0;
        padding: 2px 4px;
        min-height: 34px;
    }

    .md-tool-sep {
        margin: 0 1px;
        height: 14px;
    }

    .md-tool-btn {
        width: 28px;
        height: 28px;
        border-radius: 4px;
    }

    .md-tool-btn svg {
        width: 14px;
        height: 14px;
    }

    .md-tool-btn[data-action="h1"] span {
        font-size: 13px !important;
    }

    .md-tool-btn[data-action="h2"] span {
        font-size: 11px !important;
    }

    /* 进一步隐藏按钮 */
    .md-tool-btn[data-action="h3"],
    .md-tool-btn[data-action="image"],
    .md-tool-btn[data-action="code"],
    .md-tool-sep {
        display: none;
    }

    /* 工具栏右侧按钮缩小 */
    .md-toolbar-right .md-tool-btn {
        width: 28px;
        height: 28px;
    }

    .md-toolbar-right .md-tool-btn svg {
        width: 14px;
        height: 14px;
    }

    /* 面板标题栏：极简 */
    .md-pane-header {
        padding: 4px 8px;
        font-size: 10px;
        min-height: 26px;
    }

    .md-pane-btn {
        width: 24px;
        height: 24px;
        border-radius: 4px;
    }

    .md-pane-btn svg {
        width: 13px;
        height: 13px;
    }

    /* 预览区：更小的标题 */
    .md-preview h1 { font-size: 1.2em; margin-bottom: 0.2em; padding-bottom: 0.15em; }
    .md-preview h2 { font-size: 1.05em; margin: 0.6em 0 0.25em; padding-bottom: 0.1em; }
    .md-preview h3 { font-size: 0.95em; margin: 0.5em 0 0.2em; }
    .md-preview h4 { font-size: 0.9em; margin: 0.4em 0 0.15em; }
    .md-preview h5, .md-preview h6 { font-size: 0.85em; }

    .md-preview p {
        margin: 0.3em 0;
        line-height: 1.5;
        font-size: 0.88em;
    }

    .md-preview ul, .md-preview ol {
        padding-left: 1.2em;
        margin: 0.2em 0;
    }

    .md-preview li {
        font-size: 0.88em;
        line-height: 1.4;
    }

    .md-preview pre {
        padding: 8px;
        margin: 0.4em 0;
        border-radius: 6px;
    }

    .md-preview pre code {
        font-size: 10.5px;
        line-height: 1.4;
    }

    .md-preview code:not(pre code) {
        font-size: 0.82em;
        padding: 1px 4px;
        border-radius: 3px;
    }

    .md-preview blockquote {
        padding: 5px 10px;
        margin: 0.4em 0;
        border-left-width: 3px;
    }

    .md-preview blockquote p {
        margin: 0.15em 0;
        font-size: 0.86em;
    }

    .md-preview table {
        font-size: 0.75em;
    }

    .md-preview th, .md-preview td {
        padding: 5px 6px;
    }

    .md-preview hr {
        margin: 0.6em 0;
    }

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

    .md-input {
        padding: 8px 10px;
        font-size: 12px;
        line-height: 1.5;
    }

    .md-input::placeholder {
        font-size: 11px;
    }

    .md-preview {
        padding: 8px 10px;
    }

    .md-preview strong {
        color: var(--text-primary);
    }

    /* 分割线变细 */
    .md-resizer {
        height: 3px;
    }

    /* Toast */
    .md-toast {
        font-size: 11px;
        padding: 7px 12px;
        border-radius: 6px;
    }

    /* 下拉菜单 */
    .md-dropdown {
        min-width: 140px;
        border-radius: 6px;
    }

    .md-dropdown-item {
        padding: 9px 12px;
        font-size: 12px;
    }
}

/* ----- 小于 380px：超小屏（iPhone SE 等） ----- */
@media (max-width: 380px) {
    .md-editor-pane {
        min-height: 120px;
        max-height: 35vh;
    }

    .md-toolbar {
        min-height: 32px;
        padding: 2px 3px;
    }

    .md-tool-btn {
        width: 26px;
        height: 26px;
    }

    .md-tool-btn svg {
        width: 13px;
        height: 13px;
    }

    .md-tool-btn[data-action="ol"],
    .md-tool-btn[data-action="quote"] {
        display: none;
    }

    .md-pane-header {
        padding: 3px 6px;
        font-size: 10px;
        min-height: 24px;
    }

    .md-input {
        padding: 6px 8px;
        font-size: 11px;
    }

    .md-preview {
        padding: 6px 8px;
    }

    .md-preview h1 { font-size: 1.1em; }
    .md-preview h2 { font-size: 1em; }
    .md-preview h3 { font-size: 0.9em; }
    .md-preview p { font-size: 0.84em; line-height: 1.45; }
    .md-preview li { font-size: 0.84em; }
    .md-preview pre code { font-size: 10px; }
    .md-preview table { font-size: 0.7em; }
    .md-preview th, .md-preview td { padding: 4px 5px; }
}

/* ==================== 移动端页脚压缩 ==================== */
@media (max-width: 768px) {
    .md-page .footer {
        padding: 12px 0;
        font-size: 11px;
    }

    .md-page .footer-copy {
        font-size: 11px;
        margin: 0;
    }
}

@media (max-width: 480px) {
    .md-page .footer {
        padding: 8px 0;
        font-size: 10px;
    }

    .md-page .footer-copy {
        font-size: 10px;
    }
}

/* 移动端安全区域适配 (iPhone X+ 刘海屏) */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    @media (max-width: 480px) {
        .md-page .footer {
            padding-bottom: calc(8px + env(safe-area-inset-bottom));
        }

        .md-toast-container {
            bottom: calc(16px + env(safe-area-inset-bottom));
        }
    }
}

/* ==================== 打印样式 ==================== */
@media print {
    .navbar,
    .md-toolbar,
    .md-editor-pane,
    .md-resizer,
    .md-pane-header,
    .footer,
    .md-toast-container,
    .md-dropdown {
        display: none !important;
    }

    .md-body {
        display: block !important;
        overflow: visible !important;
    }

    .md-preview-pane {
        flex: none !important;
        max-width: none !important;
    }

    .md-preview {
        padding: 0 !important;
        overflow: visible !important;
        color: #000 !important;
        background: #fff !important;
    }

    .md-preview * {
        color: #000 !important;
    }

    .md-preview pre {
        border: 1px solid #ccc;
        background: #f5f5f5;
    }

    .md-preview code {
        background: #f0f0f0;
    }
}