/* ==========================================================
   DocMorph - Offline Markdown & Documentation Converter Styles
   Vanilla CSS Design System (Strictly No Emojis)
   ========================================================== */

:root {
  --bg-app: #0d1117;
  --bg-surface: #161b22;
  --bg-card: #1c2128;
  --bg-subtle: #21262d;
  --bg-code: #0b0e14;
  --border-main: #30363d;
  --border-focus: #58a6ff;
  --text-primary: #f0f6fc;
  --text-secondary: #c9d1d9;
  --text-muted: #8b949e;
  --accent-primary: #388bfd;
  --accent-hover: #58a6ff;
  --accent-subtle: rgba(56, 139, 253, 0.15);
  --success: #238636;
  --warning: #d29922;
  --danger: #f85149;
  --info: #1f6feb;
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 28px rgba(0, 0, 0, 0.5);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --header-height: 60px;
}

body.light-theme {
  --bg-app: #f6f8fa;
  --bg-surface: #ffffff;
  --bg-card: #f8f9fa;
  --bg-subtle: #eaeef2;
  --bg-code: #f3f4f6;
  --border-main: #d0d7de;
  --border-focus: #0969da;
  --text-primary: #1f2328;
  --text-secondary: #24292f;
  --text-muted: #57606a;
  --accent-primary: #0969da;
  --accent-hover: #1f6feb;
  --accent-subtle: rgba(9, 105, 218, 0.1);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 24px rgba(0, 0, 0, 0.12);
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-app);
  color: var(--text-secondary);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.app-header {
  height: var(--header-height);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  flex-shrink: 0;
  z-index: 50;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-logo {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-primary), #6e40c9);
  color: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.brand-subtitle {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
}

.offline-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(35, 134, 54, 0.15);
  border: 1px solid rgba(35, 134, 54, 0.4);
  color: #3fb950;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  margin-left: 0.5rem;
}

.status-dot {
  width: 6px;
  height: 6px;
  background-color: #3fb950;
  border-radius: 50%;
  display: inline-block;
}

/* Header Buttons */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.84rem;
  font-weight: 500;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}

.btn-primary {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

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

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

.btn-secondary:hover {
  background: var(--bg-subtle);
  border-color: var(--border-focus);
}

.btn-icon {
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-main);
  padding: 0.45rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
}

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

.btn-group {
  display: inline-flex;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-main);
}

.btn-group .btn {
  border-radius: 0;
  border: none;
  border-right: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-group .btn:last-child {
  border-right: none;
}

/* Theme Toggle */
.theme-toggle .icon-sun {
  display: block;
}
.theme-toggle .icon-moon {
  display: none;
}
body.light-theme .theme-toggle .icon-sun {
  display: none;
}
body.light-theme .theme-toggle .icon-moon {
  display: block;
}

/* Dropdown */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 4px);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-sm);
  min-width: 170px;
  box-shadow: var(--shadow-md);
  z-index: 100;
  overflow: hidden;
}

.dropdown-content.show {
  display: block;
}

.dropdown-item {
  padding: 0.6rem 0.9rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.15s ease;
}

.dropdown-item:hover {
  background-color: var(--accent-subtle);
  color: var(--text-primary);
}

/* App Body Layout */
.app-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Left Sidebar - Documents */
.sidebar-docs {
  width: 240px;
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-main);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 0.9rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-main);
}

.sidebar-title {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.btn-sm {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-main);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.btn-sm:hover {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

.doc-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.doc-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid transparent;
}

.doc-item:hover {
  background-color: var(--bg-subtle);
  color: var(--text-primary);
}

.doc-item.active {
  background-color: var(--accent-subtle);
  color: var(--accent-hover);
  border-color: rgba(56, 139, 253, 0.4);
  font-weight: 600;
}

.doc-item-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 150px;
}

.doc-item-delete {
  opacity: 0;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.1rem 0.3rem;
  font-size: 0.9rem;
  border-radius: 4px;
}

.doc-item:hover .doc-item-delete {
  opacity: 1;
}

.doc-item-delete:hover {
  color: var(--danger);
  background: rgba(248, 81, 73, 0.15);
}

.drop-zone {
  margin: 0.75rem;
  padding: 1rem 0.5rem;
  border: 2px dashed var(--border-main);
  border-radius: var(--radius-sm);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  transition: all 0.2s ease;
}

.drop-zone.dragover {
  border-color: var(--accent-primary);
  background-color: var(--accent-subtle);
  color: var(--text-primary);
}

/* Center Workspace */
.workspace-container {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-app);
  overflow: hidden;
}

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

.pane-header {
  height: 48px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-main);
  padding: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.pane-title-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.pane-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.doc-title-input {
  background: var(--bg-card);
  border: 1px solid var(--border-main);
  color: var(--text-primary);
  font-size: 0.82rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  font-family: inherit;
  width: 200px;
}

.doc-title-input:focus {
  outline: none;
  border-color: var(--border-focus);
}

.formatting-toolbar {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.fmt-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-main);
  color: var(--text-secondary);
  padding: 0.2rem 0.45rem;
  font-size: 0.75rem;
  border-radius: 4px;
  cursor: pointer;
}

.fmt-btn:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
  border-color: var(--border-focus);
}

.editor-wrapper {
  flex: 1;
  display: flex;
  position: relative;
  overflow: hidden;
}

.editor-textarea {
  flex: 1;
  width: 100%;
  height: 100%;
  background: var(--bg-app);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
  padding: 1.25rem;
  border: none;
  resize: none;
  outline: none;
  white-space: pre-wrap;
  word-break: break-word;
  tab-size: 2;
}

.pane-footer {
  height: 32px;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
  font-size: 0.74rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.stats-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sync-scroll-toggle label {
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* Preview Pane */
.badge-preview {
  font-size: 0.72rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--accent-subtle);
  color: var(--accent-hover);
  font-weight: 600;
}

.preview-mode-switch {
  display: flex;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-main);
  overflow: hidden;
}

.mode-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.78rem;
  padding: 0.25rem 0.65rem;
  cursor: pointer;
  font-weight: 500;
}

.mode-btn.active {
  background: var(--accent-primary);
  color: #fff;
}

.preview-content-wrapper {
  flex: 1;
  overflow-y: auto;
  padding: 2rem;
  background: var(--bg-surface);
}

.doc-paper {
  max-width: 820px;
  margin: 0 auto;
  line-height: 1.7;
}

.text-paper {
  max-width: 820px;
  margin: 0 auto;
}

.plain-text-preview {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.6;
  white-space: pre-wrap;
  color: var(--text-primary);
  background: var(--bg-code);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-main);
}

/* Rendered Documentation Elements */
.doc-paper h1,
.doc-paper h2,
.doc-paper h3,
.doc-paper h4 {
  color: var(--text-primary);
  font-weight: 600;
  margin-top: 1.8rem;
  margin-bottom: 0.75rem;
  position: relative;
}

.doc-paper h1 {
  font-size: 2.1rem;
  border-bottom: 1px solid var(--border-main);
  padding-bottom: 0.5rem;
}

.doc-paper h2 {
  font-size: 1.55rem;
  border-bottom: 1px solid var(--border-main);
  padding-bottom: 0.4rem;
}

.doc-paper h3 {
  font-size: 1.25rem;
}

.doc-paper p {
  margin-bottom: 1.1rem;
}

.doc-paper ul,
.doc-paper ol {
  margin-bottom: 1.1rem;
  padding-left: 1.75rem;
}

.doc-paper li {
  margin-bottom: 0.35rem;
}

.doc-paper a {
  color: var(--accent-hover);
  text-decoration: none;
}

.doc-paper a:hover {
  text-decoration: underline;
}

.doc-paper hr {
  height: 1px;
  background-color: var(--border-main);
  border: none;
  margin: 2rem 0;
}

/* Code Blocks */
.code-block-wrapper {
  position: relative;
  margin: 1.25rem 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-main);
  background: var(--bg-code);
  overflow: hidden;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.4rem 0.85rem;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-main);
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.copy-code-btn {
  background: transparent;
  border: 1px solid var(--border-main);
  color: var(--text-secondary);
  font-size: 0.72rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
}

.copy-code-btn:hover {
  background: var(--accent-subtle);
  color: var(--accent-hover);
}

.doc-paper pre {
  padding: 1.2rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.doc-paper code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.2em 0.4em;
  border-radius: 4px;
  background-color: var(--bg-card);
  color: #79c0ff;
}

.doc-paper pre code {
  background-color: transparent;
  padding: 0;
  color: inherit;
}

/* Tables */
.doc-paper table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-main);
}

.doc-paper th,
.doc-paper td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-main);
  text-align: left;
}

.doc-paper th {
  background-color: var(--bg-card);
  color: var(--text-primary);
  font-weight: 600;
}

.doc-paper tr:nth-child(even) {
  background-color: var(--bg-subtle);
}

/* Callouts / Admonitions */
.admonition-box {
  margin: 1.4rem 0;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  border-left: 4px solid;
  background-color: var(--bg-card);
}

.admonition-box.note {
  border-color: var(--info);
  background-color: rgba(31, 111, 235, 0.08);
}

.admonition-box.tip {
  border-color: var(--success);
  background-color: rgba(35, 134, 54, 0.08);
}

.admonition-box.warning {
  border-color: var(--warning);
  background-color: rgba(210, 153, 34, 0.08);
}

.admonition-box.caution,
.admonition-box.danger {
  border-color: var(--danger);
  background-color: rgba(248, 81, 73, 0.08);
}

.admonition-title {
  font-weight: 700;
  font-size: 0.88rem;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Mermaid Diagrams Container */
.mermaid-diagram-box {
  margin: 1.5rem 0;
  padding: 1.5rem;
  background: var(--bg-code);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-md);
  text-align: center;
  overflow-x: auto;
}

/* Right TOC Sidebar */
.sidebar-toc {
  width: 220px;
  background-color: var(--bg-surface);
  border-left: 1px solid var(--border-main);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  padding: 1.25rem 1rem;
  overflow-y: auto;
}

.toc-header {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
}

.toc-nav {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.toc-link {
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 0.2rem 0;
  transition: color 0.15s ease;
}

.toc-link:hover {
  color: var(--accent-hover);
}

.toc-link.h2 {
  padding-left: 0.5rem;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.toc-link.h3 {
  padding-left: 1rem;
  color: var(--text-muted);
  font-size: 0.74rem;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  backdrop-filter: blur(4px);
}

.modal-card {
  width: 90%;
  max-width: 650px;
  background: var(--bg-surface);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title-group {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.modal-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--accent-subtle);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
}

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

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

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  max-height: 70vh;
}

.info-callout {
  background: var(--accent-subtle);
  border-left: 3px solid var(--accent-primary);
  padding: 0.75rem 1rem;
  font-size: 0.84rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 1.25rem;
}

.cli-command-box {
  margin-bottom: 1rem;
}

.cli-cmd-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.cli-command-box pre {
  background: var(--bg-code);
  border: 1px solid var(--border-main);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
}

.cli-command-box code {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: #79c0ff;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-main);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  background: var(--bg-card);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--accent-primary);
  color: var(--text-primary);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  font-size: 0.85rem;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: all 0.25s ease;
  z-index: 300;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* Print Stylesheet */
@media print {
  body {
    background: #fff;
    color: #000;
    overflow: visible;
    height: auto;
  }
  .app-header,
  .sidebar-docs,
  .sidebar-toc,
  .pane-editor,
  .pane-header,
  .pane-footer,
  .modal-overlay,
  .toast {
    display: none !important;
  }
  .workspace-container,
  .pane-preview,
  .preview-content-wrapper {
    overflow: visible;
    padding: 0;
    background: #fff;
  }
  .doc-paper {
    max-width: 100%;
    margin: 0;
    color: #111;
  }
  .doc-paper a {
    color: #000;
    text-decoration: underline;
  }
  .code-block-wrapper,
  .doc-paper pre {
    border: 1px solid #ccc;
    background: #f8f8f8;
    color: #111;
  }
}