/* ==========================================================================
   Design System & Premium Theme Variables
   ========================================================================== */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-display: 'Outfit', sans-serif;
  --font-mono: 'Fira Code', Courier, monospace;

  /* Harmonious Dark Palette */
  --bg-app: #0b0f19;
  --bg-sidebar: #111827;
  --bg-panel: #1f2937;
  --bg-input: #374151;
  --bg-active: #374151;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #6366f1;
  
  /* Text colors */
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  /* Accents */
  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-success: #10b981;
  --color-success-hover: #059669;
  --color-danger: #ef4444;
  --color-danger-hover: #dc2626;
  --color-warning: #f59e0b;
  --color-warning-hover: #d97706;
  
  /* Shadows & Glassmorphism */
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.5);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
  --blur-glass: blur(12px);
  --bg-glass: rgba(31, 41, 55, 0.7);

  /* Animation Durations */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Custom Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-app);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-input);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ==========================================================================
   App Layout
   ========================================================================== */
.app-container {
  display: flex;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  position: relative;
}

/* Sidebar */
.app-sidebar {
  width: 320px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: transform var(--transition-normal);
  z-index: 10;
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
}

.brand h1 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, #fff 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Sidebar Filters */
.sidebar-filters {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.search-box {
  position: relative;
  width: 100%;
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-muted);
}

.search-box input {
  width: 100%;
  padding: 0.6rem 0.75rem 0.6rem 2.25rem;
  background-color: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.search-box input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.filter-group select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  background-color: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-group select:focus {
  border-color: var(--border-focus);
}

/* Tutorial List */
.tutorial-list-container {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem 0.5rem;
}

.tutorial-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tutorial-item {
  padding: 0.85rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.tutorial-item:hover {
  background-color: rgba(255, 255, 255, 0.03);
}

.tutorial-item.active {
  background-color: var(--bg-active);
  border-color: rgba(99, 102, 241, 0.3);
}

.tutorial-item-title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tutorial-item-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tutorial-item-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
}

.item-category {
  color: var(--color-primary);
  background-color: rgba(99, 102, 241, 0.15);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-weight: 500;
}

.item-date {
  color: var(--text-muted);
}

.empty-list {
  display: none;
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 1rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: rgba(0, 0, 0, 0.1);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.online {
  background-color: var(--color-success);
  box-shadow: 0 0 8px var(--color-success);
}

.status-dot.offline {
  background-color: var(--color-warning);
  box-shadow: 0 0 8px var(--color-warning);
}

.status-text {
  color: var(--text-secondary);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
  color: #fff;
  outline: none;
}

.btn svg {
  width: 16px;
  height: 16px;
}

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

.btn-secondary {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  background-color: var(--bg-active);
}

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

.btn-danger {
  background-color: rgba(239, 68, 68, 0.15);
  color: var(--color-danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}
.btn-danger:hover {
  background-color: var(--color-danger);
  color: #fff;
}

.btn-large {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  border-radius: 8px;
}

.new-btn {
  background-color: var(--color-primary);
  border: none;
  color: #fff;
  padding: 0.5rem 0.9rem;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.new-btn:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-1px);
}

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

.settings-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.4rem;
  border-radius: 6px;
  display: flex;
  transition: all var(--transition-fast);
}

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

.settings-btn svg {
  width: 18px;
  height: 18px;
}

/* ==========================================================================
   Main Area & Sections
   ========================================================================== */
.app-main {
  flex: 1;
  height: 100%;
  position: relative;
  overflow: hidden;
  background-color: var(--bg-app);
}

.content-view {
  display: none;
  flex-direction: column;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.content-view.active {
  display: flex;
  opacity: 1;
}

/* Content Header */
.content-header {
  height: 64px;
  padding: 0 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: justify;
  align-items: center;
  justify-content: space-between;
  background-color: rgba(22, 28, 45, 0.2);
  backdrop-filter: var(--blur-glass);
}

.breadcrumb-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  overflow: hidden;
  max-width: 60%;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.4rem;
  border-radius: 6px;
}

.mobile-toggle svg {
  width: 20px;
  height: 20px;
}

.meta-category {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  flex-shrink: 0;
}

.breadcrumb-separator {
  color: var(--text-muted);
}

.meta-title-short {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.action-buttons {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ==========================================================================
   Welcome Screen (Intro)
   ========================================================================== */
.welcome-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 100%;
  padding: 2rem;
  max-width: 550px;
  margin: 0 auto;
}

.welcome-icon {
  width: 80px;
  height: 80px;
  border-radius: 20px;
  background-color: rgba(99, 102, 241, 0.1);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.2);
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}

.welcome-icon svg {
  width: 40px;
  height: 40px;
}

.welcome-screen h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.welcome-screen p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.welcome-screen .subtitle {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 2rem;
}

/* ==========================================================================
   Reader Mode Container
   ========================================================================== */
.content-body {
  flex: 1;
  overflow-y: auto;
  padding: 2rem;
  position: relative;
}

.tutorial-article {
  max-width: 800px;
  margin: 0 auto;
  padding-bottom: 4rem;
}

.tutorial-title {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 1rem;
  color: #fff;
}

.tutorial-meta-row {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.meta-label {
  color: var(--text-muted);
}

.meta-badge {
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
}

.meta-badge.category {
  background-color: rgba(99, 102, 241, 0.15);
  color: var(--color-primary);
}

.meta-value {
  color: var(--text-secondary);
  font-weight: 500;
}

.tutorial-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.tag-badge {
  background-color: var(--bg-panel);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.tag-badge:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
}

/* ==========================================================================
   Rendered Markdown Styling (Reading Panel & Preview)
   ========================================================================== */
.tutorial-markdown-output {
  font-size: 1rem;
  color: rgba(243, 244, 246, 0.9);
}

.tutorial-markdown-output p {
  margin-bottom: 1.25rem;
}

.tutorial-markdown-output h1,
.tutorial-markdown-output h2,
.tutorial-markdown-output h3,
.tutorial-markdown-output h4 {
  font-family: var(--font-display);
  color: #fff;
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.tutorial-markdown-output h1 { font-size: 1.75rem; }
.tutorial-markdown-output h2 { 
  font-size: 1.4rem; 
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.4rem;
}
.tutorial-markdown-output h3 { font-size: 1.15rem; }

.tutorial-markdown-output ul,
.tutorial-markdown-output ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.tutorial-markdown-output li {
  margin-bottom: 0.5rem;
}

.tutorial-markdown-output strong {
  color: #fff;
  font-weight: 600;
}

/* Inline Code */
.tutorial-markdown-output :not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background-color: rgba(255, 255, 255, 0.08);
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  color: #f43f5e;
}

/* Interactive Command Blocks (Console style) */
.command-block-wrapper {
  position: relative;
  margin: 1.5rem 0;
  background-color: #05070c;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-left: 4px solid var(--color-success);
  border-radius: 6px;
  overflow: hidden;
}

.command-block-header {
  background-color: rgba(255, 255, 255, 0.02);
  padding: 0.4rem 1rem;
  display: flex;
  justify-content: justify;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.command-block-content {
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: #a7f3d0; /* Emerald green text for commands */
  overflow-x: auto;
  white-space: pre;
}

/* Standard Code Block */
.code-block-wrapper {
  position: relative;
  margin: 1.5rem 0;
  background-color: #0f172a;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  overflow: hidden;
}

.code-block-header {
  background-color: rgba(255, 255, 255, 0.02);
  padding: 0.4rem 1rem;
  display: flex;
  justify-content: justify;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  font-size: 0.7rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.code-block-content {
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #e2e8f0;
  overflow-x: auto;
  white-space: pre;
}

/* Copy button for code/command blocks */
.copy-code-btn {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  transition: all var(--transition-fast);
}

.copy-code-btn:hover {
  background-color: rgba(255, 255, 255, 0.15);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
}

.copy-code-btn.success {
  background-color: var(--color-success);
  color: #fff;
  border-color: transparent;
}

/* Alert Boxes / Note blockquote */
.alert-box {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  border-radius: 6px;
  border-left: 4px solid var(--color-primary);
  background-color: rgba(99, 102, 241, 0.08);
}

.alert-box.warning {
  border-left-color: var(--color-warning);
  background-color: rgba(245, 158, 11, 0.08);
}

.alert-box-title {
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.alert-box.info .alert-box-title { color: #818cf8; }
.alert-box.warning .alert-box-title { color: #fbbf24; }

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

.alert-box-content p:last-child {
  margin-bottom: 0;
}

/* Images */
.tutorial-markdown-output img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 1.5rem 0;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  display: block;
}

/* ==========================================================================
   Editing Mode Layout
   ========================================================================== */
.editor-pane-container {
  flex: 1;
  display: flex;
  height: calc(100vh - 64px);
  overflow: hidden;
}

/* Left Pane: Editor Form */
.editor-left-pane {
  flex: 1;
  height: 100%;
  overflow-y: auto;
  padding: 1.5rem;
  border-right: 1px solid var(--border-color);
}

.editor-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  height: 100%;
}

.form-row {
  display: flex;
  gap: 1rem;
}

.flex-1 { flex: 1; }
.flex-2 { flex: 2; }

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input[type="text"] {
  padding: 0.65rem 0.75rem;
  background-color: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  outline: none;
  transition: all var(--transition-fast);
}

.form-group input[type="text"]:focus {
  border-color: var(--border-focus);
}

/* Markdown Textarea Container */
.markdown-editor-container {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  background-color: var(--bg-panel);
  flex: 1;
  min-height: 400px;
}

.editor-toolbar {
  background-color: rgba(0, 0, 0, 0.15);
  border-bottom: 1px solid var(--border-color);
  padding: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  align-items: center;
}

.toolbar-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: all var(--transition-fast);
}

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

.toolbar-divider {
  width: 1px;
  height: 16px;
  background-color: var(--border-color);
  margin: 0 0.25rem;
}

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

.markdown-editor-container textarea {
  width: 100%;
  flex: 1;
  border: none;
  background: none;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 1rem;
  resize: none;
  outline: none;
  line-height: 1.5;
}

/* Drag & Drop Overlay inside Editor */
.drag-drop-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(11, 15, 25, 0.95);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 5;
  border: 2px dashed var(--color-primary);
  margin: 4px;
  border-radius: 6px;
  pointer-events: none;
}

.drag-drop-overlay.active {
  display: flex;
}

.overlay-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  color: var(--color-primary);
}

.overlay-content svg {
  width: 48px;
  height: 48px;
  animation: bounce 1.5s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* Right Pane: Realtime Preview */
.editor-right-pane {
  flex: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.preview-header {
  background-color: rgba(0, 0, 0, 0.1);
  border-bottom: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
}

.preview-header h3 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.preview-body {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
}

/* ==========================================================================
   Modals
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: var(--blur-glass);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background-color: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  width: 100%;
  max-width: 500px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform: scale(0.95);
  opacity: 0;
  transition: all var(--transition-normal);
}

.modal-overlay.active .modal {
  transform: scale(1);
  opacity: 1;
}

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

.modal-header h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
}

.close-modal-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.75rem;
  cursor: pointer;
  line-height: 1;
  display: flex;
  align-items: center;
}

.close-modal-btn:hover {
  color: #fff;
}

.modal-body {
  padding: 1.5rem;
}

.modal-section h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: #fff;
}

.section-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.input-with-button {
  display: flex;
  gap: 0.5rem;
}

.input-with-button input {
  flex: 1;
  padding: 0.6rem 0.75rem;
  background-color: var(--bg-sidebar);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: #fff;
  outline: none;
  font-family: var(--font-sans);
}

.input-with-button input:focus {
  border-color: var(--border-focus);
}

.field-help {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

.modal-divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 1.5rem 0;
}

.backup-actions {
  display: flex;
  gap: 0.75rem;
}

.backup-actions .btn {
  flex: 1;
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  background-color: var(--bg-panel);
  border-left: 4px solid var(--color-primary);
  border-radius: 6px;
  padding: 0.75rem 1.25rem;
  color: #fff;
  font-size: 0.9rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transform: translateY(20px);
  opacity: 0;
  animation: slideIn 0.3s forwards;
  min-width: 250px;
  max-width: 400px;
}

@keyframes slideIn {
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.toast.success { border-left-color: var(--color-success); }
.toast.danger { border-left-color: var(--color-danger); }
.toast.warning { border-left-color: var(--color-warning); }

/* ==========================================================================
   Responsive adjustments
   ========================================================================== */
@media (max-width: 1023px) {
  /* Side-by-side collapses to single column scroll */
  .editor-pane-container {
    flex-direction: column;
    overflow-y: auto;
    height: auto;
  }
  
  .editor-left-pane {
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

  .editor-right-pane {
    height: auto;
    min-height: 400px;
  }
}

@media (max-width: 768px) {
  /* Sidebar is overlay on mobile */
  .app-sidebar {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }
  
  .app-sidebar.active {
    transform: translateX(0);
  }

  .mobile-toggle {
    display: flex;
  }

  /* Make header look nicer on mobile */
  .content-header {
    padding: 0 1rem;
  }
  
  .action-buttons span {
    display: none; /* Hide button texts on small mobile */
  }
  
  .action-buttons button {
    padding: 0.5rem;
  }

  .tutorial-article {
    padding: 0.5rem 0.5rem 2rem 0.5rem;
  }
  
  .tutorial-title {
    font-size: 1.75rem;
  }
  
  .backup-actions {
    flex-direction: column;
  }
}