/* CSS Variables for Light and Dark Themes */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f6f8fa;
    --bg-tertiary: #eaeef2;
    --border-color: #d0d7de;
    --text-primary: #24292f;
    --text-secondary: #57606a;
    --accent-color: #0969da;
    --accent-hover: #0550ae;
    --accent-light: #ddf4ff;
    --badge-live-bg: #dafbe1;
    --badge-live-text: #1a7f37;
    --badge-live-dot: #1a7f37;
    --badge-off-bg: #ffebe9;
    --badge-off-text: #cf222e;
    --badge-off-dot: #cf222e;
    --modal-overlay: rgba(0, 0, 0, 0.5);
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    --font-mono: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
}

[data-theme="dark"] {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --border-color: #30363d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent-color: #58a6ff;
    --accent-hover: #1f6feb;
    --accent-light: #153e75;
    --badge-live-bg: rgba(56, 139, 253, 0.15);
    --badge-live-text: #58a6ff;
    --badge-live-dot: #58a6ff;
    --badge-off-bg: rgba(248, 81, 73, 0.15);
    --badge-off-text: #f85149;
    --badge-off-dot: #f85149;
    --modal-overlay: rgba(0, 0, 0, 0.7);
}

/* Global Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    height: 100vh;
    overflow: hidden;
}

/* App Layout */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar Styles */
.sidebar {
    width: 320px;
    min-width: 320px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: margin-left 0.3s ease;
}

.sidebar.collapsed {
    margin-left: -320px;
}

.sidebar-header {
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 1.2rem;
    color: var(--accent-color);
}

.workspace-section {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.workspace-buttons {
    display: flex;
    gap: 8px;
}

.workspace-buttons .primary-btn {
    flex: 1;
    padding: 8px 10px;
    font-size: 0.8rem;
}

.workspace-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.section-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 600;
    letter-spacing: 0.5px;
}

.path-display {
    font-size: 0.85rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-family: var(--font-mono);
}

.search-section {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
}

.search-box {
    display: flex;
    align-items: center;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 6px 10px;
    gap: 8px;
    position: relative;
}

.search-icon {
    color: var(--text-secondary);
    flex-shrink: 0;
}

.search-box input {
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.85rem;
    width: 100%;
    outline: none;
}

.clear-btn {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-secondary);
    cursor: pointer;
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
}

.clear-btn:hover {
    background-color: var(--bg-tertiary);
}

.tree-section {
    flex: 1;
    overflow-y: auto;
    padding: 12px 8px;
}

/* File Tree Component */
.file-tree {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.empty-tree-message {
    padding: 16px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-align: center;
    line-height: 1.4;
}

.tree-node {
    display: flex;
    flex-direction: column;
}

.tree-row {
    display: flex;
    align-items: center;
    padding: 6px 8px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    user-select: none;
    gap: 6px;
    color: var(--text-primary);
    text-decoration: none;
}

.tree-row:hover {
    background-color: var(--bg-tertiary);
}

.tree-row.active {
    background-color: var(--accent-light);
    color: var(--accent-color);
    font-weight: 500;
}

.tree-row.active svg {
    color: var(--accent-color);
}

.tree-indent {
    width: 16px;
    flex-shrink: 0;
}

.tree-arrow {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    color: var(--text-secondary);
    transition: transform 0.15s ease;
}

.tree-arrow.expanded {
    transform: rotate(90deg);
}

.tree-arrow.hidden {
    visibility: hidden;
}

.tree-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    color: var(--text-secondary);
}

.tree-label {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.tree-children {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* Buttons */
.primary-btn, .secondary-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    border: 1px solid var(--border-color);
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.primary-btn {
    background-color: var(--accent-color);
    color: #ffffff;
    border-color: rgba(27, 31, 36, 0.15);
}

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

.secondary-btn {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

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

.icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 6px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Main Content Area */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    background-color: var(--bg-primary);
    overflow: hidden;
}

.content-header {
    height: 56px;
    border-bottom: 1px solid var(--border-color);
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-primary);
    flex-shrink: 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
    overflow: hidden;
}

.file-info {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    overflow: hidden;
}

.file-icon {
    flex-shrink: 0;
}

.status-badges {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Status Badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.status-badge .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.status-badge.connected {
    background-color: var(--badge-live-bg);
    color: var(--badge-live-text);
}

.status-badge.connected .dot {
    background-color: var(--badge-live-dot);
    box-shadow: 0 0 0 0 rgba(26, 127, 55, 0.4);
    animation: pulse 1.5s infinite;
}

.status-badge.disconnected {
    background-color: var(--badge-off-bg);
    color: var(--badge-off-text);
}

.status-badge.disconnected .dot {
    background-color: var(--badge-off-dot);
}

@keyframes pulse {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(26, 127, 55, 0.7);
    }
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 6px rgba(26, 127, 55, 0);
    }
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(26, 127, 55, 0);
    }
}

/* Markdown Container */
.markdown-container {
    flex: 1;
    overflow-y: auto;
    padding: 40px;
    display: flex;
    justify-content: center;
}

.markdown-body {
    width: 100%;
    max-width: 100%;
    line-height: 1.6;
    word-wrap: break-word;
}

/* Welcome Screen */
.welcome-screen {
    text-align: center;
    padding: 40px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    color: var(--text-secondary);
}

.welcome-screen h1 {
    font-size: 2.5rem;
    color: var(--accent-color);
    font-weight: 700;
}

.welcome-screen p {
    font-size: 1.1rem;
    max-width: 600px;
    line-height: 1.5;
}

.welcome-steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 500px;
    text-align: left;
    margin-top: 20px;
}

.step {
    display: flex;
    align-items: center;
    gap: 16px;
    background-color: var(--bg-secondary);
    padding: 16px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.step-number {
    width: 32px;
    height: 32px;
    background-color: var(--accent-color);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
    flex-shrink: 0;
}

.step-text {
    font-size: 0.95rem;
    color: var(--text-primary);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--modal-overlay);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    width: 600px;
    max-width: 90%;
    height: 500px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 8px 24px rgba(140, 149, 159, 0.2);
}

.modal-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

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

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

.modal-body {
    padding: 20px 24px;
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.path-input-row {
    display: flex;
    gap: 8px;
}

.path-input-row input {
    flex: 1;
    padding: 8px 12px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    outline: none;
}

.path-input-row input:focus {
    border-color: var(--accent-color);
    background-color: var(--bg-primary);
}

.browser-navigation {
    display: flex;
    align-items: center;
    gap: 12px;
    background-color: var(--bg-secondary);
    padding: 8px 12px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.modal-path-text {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.folder-list {
    flex: 1;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow-y: auto;
    background-color: var(--bg-primary);
}

.folder-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    cursor: pointer;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--border-color);
}

.folder-row:last-child {
    border-bottom: none;
}

.folder-row:hover {
    background-color: var(--bg-secondary);
}

.folder-row svg {
    color: var(--text-secondary);
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* Markdown Typography (GitHub-like) */
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
    margin-top: 24px;
    margin-bottom: 16px;
    font-weight: 600;
    line-height: 1.25;
}

.markdown-body h1 { font-size: 2em; border-bottom: 1px solid var(--border-color); padding-bottom: 0.3em; }
.markdown-body h2 { font-size: 1.5em; border-bottom: 1px solid var(--border-color); padding-bottom: 0.3em; }
.markdown-body h3 { font-size: 1.25em; }
.markdown-body h4 { font-size: 1em; }

.markdown-body p,
.markdown-body blockquote,
.markdown-body ul,
.markdown-body ol,
.markdown-body dl,
.markdown-body table,
.markdown-body pre,
.markdown-body details {
    margin-top: 0;
    margin-bottom: 16px;
}

.markdown-body a {
    color: var(--accent-color);
    text-decoration: none;
}

.markdown-body a:hover {
    text-decoration: underline;
}

.markdown-body code {
    padding: 0.2em 0.4em;
    margin: 0;
    font-size: 85%;
    background-color: var(--bg-secondary);
    border-radius: 6px;
    font-family: var(--font-mono);
}

.markdown-body pre {
    padding: 16px;
    overflow: auto;
    font-size: 85%;
    line-height: 1.45;
    background-color: var(--bg-secondary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.markdown-body pre code {
    background-color: transparent;
    padding: 0;
    margin: 0;
    font-size: 100%;
    word-break: normal;
    white-space: pre;
    border-radius: 0;
}

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

.markdown-body ul,
.markdown-body ol {
    padding-left: 2em;
}

.markdown-body li {
    margin-top: 0.25em;
}

.markdown-body table {
    border-spacing: 0;
    border-collapse: collapse;
    width: 100%;
}

.markdown-body table th,
.markdown-body table td {
    padding: 6px 13px;
    border: 1px solid var(--border-color);
}

.markdown-body table tr {
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
}

.markdown-body table tr:nth-child(2n) {
    background-color: var(--bg-secondary);
}

.markdown-body input[type="checkbox"] {
    margin-right: 0.3em;
    vertical-align: middle;
}

/* Mermaid Diagrams Container */
.mermaid {
    background-color: transparent !important;
    display: flex;
    justify-content: center;
    margin: 20px 0;
}

/* Export Buttons */
.export-buttons {
    display: flex;
    gap: 8px;
}

/* Print Styles for PDF Export */
@media print {
    body, .app-container, .main-content, .markdown-container {
        height: auto !important;
        overflow: visible !important;
        background: white !important;
        color: #000000 !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    .sidebar, .content-header, .status-badges, .export-buttons {
        display: none !important;
    }
    .markdown-body {
        max-width: 100% !important;
        padding: 20mm !important;
    }
}