/* ==========================================================================
   Design System & Base Styling
   ========================================================================== */

:root {
  /* App UI Theme Variables (Modern Dark Glassmorphism) */
  --bg-app: #080c14;
  --bg-panel: rgba(17, 24, 39, 0.75);
  --bg-toolbar: rgba(15, 23, 42, 0.85);
  --bg-sidebar: rgba(11, 17, 30, 0.9);
  --border-ui: rgba(255, 255, 255, 0.08);
  --border-focus: #3b82f6;
  
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --accent-blue: #3b82f6;
  --accent-blue-hover: #1d4ed8;
  --accent-blue-glow: rgba(59, 130, 246, 0.35);
  --accent-emerald: #10b981;
  --accent-purple: #8b5cf6;
  --accent-danger: #ef4444;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-neon: 0 0 15px var(--accent-blue-glow);
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Scrollbar Style */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.1);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

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

body {
  font-family: 'Outfit', 'Inter', 'Noto Sans KR', sans-serif;
  background-color: var(--bg-app);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
}

/* ==========================================================================
   Application Layout
   ========================================================================== */

.app-layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100%;
  position: relative;
  background-image: radial-gradient(circle at 10% 20%, rgba(59, 130, 246, 0.05) 0%, transparent 40%),
                    radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 40%);
}

/* Header */
.app-header {
  height: 64px;
  background-color: var(--bg-toolbar);
  border-bottom: 1px solid var(--border-ui);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  backdrop-filter: blur(12px);
  z-index: 10;
  flex-shrink: 0;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-neon);
}

.brand-icon i {
  color: #fff;
  font-size: 1.1rem;
}

.brand-text h1 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.brand-text h1 .accent-text {
  background: linear-gradient(90deg, var(--accent-blue) 0%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-text .tagline {
  font-size: 0.72rem;
  color: var(--text-secondary);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Dropdown */
.dropdown-wrapper {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background-color: #111827;
  border: 1px solid var(--border-ui);
  border-radius: var(--radius-md);
  padding: 6px 0;
  min-width: 190px;
  list-style: none;
  box-shadow: var(--shadow-lg);
  display: none;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.dropdown-menu.active {
  display: block;
  animation: dropdownFadeIn 0.15s cubic-bezier(0, 0, 0.2, 1) forwards;
}

@keyframes dropdownFadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.dropdown-menu li {
  padding: 10px 16px;
  font-size: 0.88rem;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: var(--transition-fast);
}

.dropdown-menu li i {
  width: 16px;
  color: var(--text-secondary);
}

.dropdown-menu li:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--accent-blue);
}

.dropdown-menu li:hover i {
  color: var(--accent-blue);
}

/* ==========================================================================
   Buttons and Forms
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  background-color: transparent;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue) 0%, #2563eb 100%);
  color: #fff;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--border-ui);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--text-secondary);
}

.btn-icon {
  background-color: transparent;
  border-color: transparent;
  color: var(--text-secondary);
}

.btn-icon:hover {
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.05);
}

.btn-danger {
  background-color: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

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

/* Custom Select Dropdowns */
.select-wrapper {
  position: relative;
}

.select-wrapper select {
  appearance: none;
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-ui);
  color: var(--text-primary);
  padding: 8px 32px 8px 12px;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  outline: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.select-wrapper select option,
.form-group select option {
  background-color: #111827;
  color: #f3f4f6;
}

.select-wrapper select:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: var(--text-secondary);
}

.select-wrapper select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.15);
}

.select-arrow {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  font-size: 0.7rem;
  color: var(--text-secondary);
}

/* Screenreader text utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ==========================================================================
   Workspace Container & Resizing
   ========================================================================== */

.workspace-container {
  display: flex;
  flex: 1;
  width: 100%;
  height: calc(100vh - 64px);
  position: relative;
  overflow: hidden;
}

/* Sidebar slide navigator */
.sidebar-navigator {
  width: 220px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-ui);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  backdrop-filter: blur(10px);
  transition: transform var(--transition-normal);
}

.sidebar-header {
  height: 48px;
  border-bottom: 1px solid var(--border-ui);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  color: var(--text-secondary);
}

.sidebar-header h3 {
  font-size: 0.88rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-text-icon {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.btn-text-icon:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.navigator-slides {
  flex: 1;
  overflow-y: auto;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Resizer */
.workspace-resizer {
  width: 4px;
  background-color: var(--border-ui);
  cursor: col-resize;
  position: relative;
  z-index: 5;
  transition: background-color var(--transition-fast);
}

.workspace-resizer:hover,
.workspace-resizer.resizing {
  background-color: var(--accent-blue);
  box-shadow: 0 0 10px var(--accent-blue-glow);
}

.resizer-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 12px;
  height: 36px;
  border-radius: var(--radius-full);
  background-color: #1f2937;
  border: 1px solid var(--border-ui);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  pointer-events: none;
}

.resizer-handle::before,
.resizer-handle::after {
  content: '';
  width: 2px;
  height: 12px;
  background-color: var(--text-muted);
}

/* Panels */
.panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-panel);
}

.panel-editor {
  width: 45%; /* default ratio */
  min-width: 300px;
}

.panel-preview {
  flex: 1;
  min-width: 350px;
  position: relative;
}

.panel-toolbar {
  height: 48px;
  background-color: var(--bg-toolbar);
  border-bottom: 1px solid var(--border-ui);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  flex-shrink: 0;
  backdrop-filter: blur(8px);
}

.panel-toolbar.justify-between {
  justify-content: space-between;
}

.panel-title-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Toolbar items */
.toolbar-section {
  display: flex;
  align-items: center;
  gap: 4px;
}

.toolbar-section.flex-end {
  margin-left: auto;
}

.toolbar-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 8px;
  font-size: 0.88rem;
  cursor: pointer;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.toolbar-btn:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.toolbar-btn:active {
  background-color: rgba(255, 255, 255, 0.1);
}

.toolbar-btn.btn-badge {
  padding: 6px 10px;
  gap: 6px;
  background-color: rgba(59, 130, 246, 0.06);
  border: 1px solid rgba(59, 130, 246, 0.15);
  color: #93c5fd;
  font-size: 0.78rem;
  font-weight: 500;
}

.toolbar-btn.btn-badge:hover {
  background-color: rgba(59, 130, 246, 0.12);
  border-color: rgba(59, 130, 246, 0.3);
  color: #fff;
}

.toolbar-divider {
  width: 1px;
  height: 16px;
  background-color: var(--border-ui);
  margin: 0 4px;
}

.editor-stats {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.stat-dot {
  width: 4px;
  height: 4px;
  background-color: var(--text-muted);
  border-radius: var(--radius-full);
}

/* ==========================================================================
   Editor Area
   ========================================================================== */

.editor-content-wrapper {
  flex: 1;
  position: relative;
  overflow: hidden;
  background-color: #0b0f17;
}

#markdown-editor {
  width: 100%;
  height: 100%;
  background-color: transparent;
  border: none;
  resize: none;
  outline: none;
  color: #e2e8f0;
  font-family: 'Fira Code', Consolas, Monaco, monospace;
  font-size: 0.88rem;
  line-height: 1.6;
  padding: 20px;
  overflow-y: auto;
  scrollbar-gutter: stable;
}

/* ==========================================================================
   Preview Area
   ========================================================================== */

.view-mode-tabs {
  display: flex;
  background-color: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-md);
  padding: 3px;
  margin-left: 12px;
  border: 1px solid var(--border-ui);
}

.tab-btn {
  background: none;
  border: none;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

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

.tab-btn.active {
  background-color: rgba(255, 255, 255, 0.08);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.error-badge {
  background-color: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
  font-size: 0.76rem;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Preview display container */
.preview-display-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  background-color: #0b0f19;
  display: flex;
  align-items: center;
  justify-content: center;
}

.slide-view-viewport {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

/* Slide scale and wrap */
.slide-wrapper {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

/* Single Slide View vs Scroll list */
.preview-display-container.scroll-mode-on {
  overflow-y: auto;
  display: block;
}

.preview-display-container.scroll-mode-on .slide-view-viewport {
  flex-direction: column;
  height: auto;
  gap: 30px;
  padding: 40px 20px;
  align-items: center;
  justify-content: flex-start;
}

.preview-display-container.scroll-mode-on .slide-wrapper {
  width: 100%;
  height: 280px; /* arbitrary containing box for scaling */
  flex-shrink: 0;
  max-width: 600px;
}

/* Player controls at bottom */
.preview-player-controls {
  height: 56px;
  background-color: var(--bg-toolbar);
  border-top: 1px solid var(--border-ui);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  flex-shrink: 0;
  backdrop-filter: blur(8px);
}

.player-left, .player-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.player-center {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.player-btn {
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-ui);
  color: var(--text-primary);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.player-btn:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: var(--text-secondary);
  color: var(--accent-blue);
}

.player-btn.btn-highlight {
  width: auto;
  height: auto;
  padding: 8px 18px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
  border: none;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
  color: #fff;
}

.player-btn.btn-highlight:hover {
  transform: translateY(-1px);
  color: #fff;
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.45);
}

.player-page-indicator {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  min-width: 60px;
  text-align: center;
}

/* ==========================================================================
   Presenter Console Style
   ========================================================================== */

.presenter-console-panel {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  background-color: #0b0f19;
  height: 100%;
}

.presenter-flex-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  gap: 16px;
}

.presenter-top-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 250px;
}

.presenter-main-slide {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.presenter-top-section .presenter-slide-outer {
  flex: 1;
  width: 100%;
  aspect-ratio: auto;
}

.presenter-bottom-section {
  height: 220px;
  display: flex;
  flex-direction: row;
  gap: 16px;
  border-top: 1px solid var(--border-ui);
  padding-top: 16px;
  flex-shrink: 0;
}

.presenter-next-slide {
  width: 320px;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.presenter-next-slide .presenter-slide-outer {
  flex: 1;
  aspect-ratio: auto;
}

.presenter-notes {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 200px;
}

.presenter-timer-controls {
  width: 260px;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.presenter-section-title {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-weight: 600;
}

.presenter-slide-outer {
  background-color: #000;
  border: 1px solid var(--border-ui);
  border-radius: var(--radius-md);
  aspect-ratio: 16/9;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
}

.notes-content-box {
  background-color: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-ui);
  border-radius: var(--radius-md);
  padding: 16px;
  flex: 1;
  min-height: 120px;
  overflow-y: auto;
  font-size: 0.95rem;
  line-height: 1.6;
  color: #cbd5e1;
}

.no-notes-placeholder {
  color: var(--text-muted);
  font-style: italic;
}

.timer-box {
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-ui);
  border-radius: var(--radius-md);
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 12px;
}

.timer-display {
  font-family: 'Fira Code', monospace;
  font-size: 1.8rem;
  font-weight: 700;
  color: #38bdf8;
  letter-spacing: -1px;
}

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

.btn-timer {
  background-color: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #93c5fd;
  padding: 6px 12px;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-timer:hover {
  background-color: rgba(59, 130, 246, 0.3);
  color: #fff;
}

.btn-timer-reset {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--border-ui);
  color: var(--text-secondary);
}

.btn-timer-reset:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

/* ==========================================================================
   Slide Thumbnails Navigator
   ========================================================================== */

.nav-slide-card {
  width: 100%;
  aspect-ratio: 16/9;
  background-color: #000;
  border: 2px solid var(--border-ui);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.nav-slide-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.nav-slide-card.active {
  border-color: var(--accent-blue);
  box-shadow: 0 0 12px var(--accent-blue-glow);
}

.nav-slide-card-badge {
  position: absolute;
  top: 6px;
  left: 6px;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-sm);
  background-color: rgba(0, 0, 0, 0.65);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-slide-thumbnail-wrapper {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

/* Inside thumbnail wrapper, we put scaled slide */
.nav-slide-thumbnail-wrapper .slide {
  transform: scale(0.1875); /* scaling for 960x540 -> 180x101.25 */
  transform-origin: center center;
  flex-shrink: 0;
  position: absolute;
}

/* ==========================================================================
   Presentation Screen Style (Actual slide rendering)
   ========================================================================== */

/* The Slide Element */
.slide {
  position: relative;
  width: 960px;
  height: 540px;
  flex-shrink: 0;
  box-sizing: border-box;
  padding: 60px;
  overflow: hidden;
  font-size: 22px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: flex-start;
  line-height: 1.5;
  border: 1px solid var(--border-ui);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  transition: transform 0.05s ease; /* fast resize responsive */
}

/* Presentation slide inner elements */
.slide h1 {
  font-size: 2.5rem;
  margin-bottom: 24px;
  line-height: 1.2;
}

.slide h2 {
  font-size: 1.8rem;
  margin-top: 10px;
  margin-bottom: 18px;
}

.slide h3 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.slide p {
  margin-bottom: 16px;
}

.slide ul, .slide ol {
  margin-bottom: 20px;
  padding-left: 32px;
}

.slide li {
  margin-bottom: 8px;
}

.slide blockquote {
  border-left: 6px solid var(--accent-blue);
  background-color: rgba(59, 130, 246, 0.06);
  padding: 12px 24px;
  margin: 16px 0;
  font-style: italic;
  width: 100%;
}

.slide table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.9rem;
}

.slide th, .slide td {
  border: 1px solid var(--border-ui);
  padding: 10px 14px;
  text-align: left;
}

.slide th {
  font-weight: 600;
  background-color: rgba(255, 255, 255, 0.04);
}

.slide code {
  font-family: 'Fira Code', Monaco, monospace;
  font-size: 0.85em;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  background-color: rgba(0, 0, 0, 0.08);
}

.slide pre {
  width: 100%;
  overflow: hidden;
  margin: 16px 0;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.slide pre code {
  display: block;
  padding: 16px;
  overflow-x: auto;
  background-color: #111827;
  color: #f3f4f6;
  font-size: 0.78rem;
  line-height: 1.5;
}

.slide img {
  max-width: 100%;
  max-height: 280px;
  object-fit: contain;
  margin: 10px auto;
  display: block;
  border-radius: var(--radius-sm);
}

/* Page, header, footer decoration */
.slide-header-node {
  position: absolute;
  top: 24px;
  left: 60px;
  right: 60px;
  font-size: 0.75rem;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 6px;
  text-align: left;
  line-height: 1;
}

.slide-footer-node {
  position: absolute;
  bottom: 24px;
  left: 60px;
  right: 120px;
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: left;
  line-height: 1;
}

.slide-pagination-node {
  position: absolute;
  bottom: 24px;
  right: 60px;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Horizontal ratio adjustments */
.ratio-16-9 .slide { width: 960px; height: 540px; }
.ratio-4-3 .slide { width: 960px; height: 720px; }
.ratio-1-1 .slide { width: 720px; height: 720px; }

/* Slide orientation adjustments for print */
@media print {
  body {
    background-color: #fff;
    color: #000;
    overflow: visible;
    height: auto;
  }
  .app-layout, .presentation-fullscreen-overlay {
    display: none !important;
  }
  .slide-view-viewport {
    display: block !important;
    height: auto !important;
  }
  .slide-wrapper {
    display: block !important;
    height: auto !important;
    page-break-after: always;
    transform: none !important;
    margin: 0 !important;
    padding: 0 !important;
    box-shadow: none !important;
  }
  .slide {
    position: relative !important;
    transform: none !important;
    box-shadow: none !important;
    border: none !important;
    page-break-after: always;
    page-break-inside: avoid;
  }
}

/* ==========================================================================
   Slide Themes (Marp Directives mapping)
   ========================================================================== */

/* 1. Theme: Default (Elegant Modern Corporate) */
.slide.theme-default {
  background-color: #ffffff;
  color: #1f2937;
  font-family: 'Outfit', 'Inter', sans-serif;
}
.slide.theme-default h1, .slide.theme-default h2, .slide.theme-default h3 {
  color: #0f172a;
}
.slide.theme-default h1 {
  border-bottom: 2px solid #f1f5f9;
  padding-bottom: 12px;
}
.slide.theme-default pre code {
  background-color: #0f172a;
}
.slide.theme-default code {
  background-color: #f1f5f9;
  color: #0f172a;
}
.slide.theme-default th {
  background-color: #f8fafc;
}
.slide.theme-default .slide-header-node {
  border-bottom-color: rgba(0, 0, 0, 0.05);
}

/* 2. Theme: Gaia (Warm & Elegant Cream) */
.slide.theme-gaia {
  background-color: #faf7ee;
  color: #2e302f;
  font-family: 'Outfit', 'Noto Sans KR', sans-serif;
}
.slide.theme-gaia h1, .slide.theme-gaia h2, .slide.theme-gaia h3 {
  color: #8c2525;
}
.slide.theme-gaia h1 {
  font-weight: 700;
  border-bottom: 2px dashed rgba(140, 37, 37, 0.15);
  padding-bottom: 8px;
}
.slide.theme-gaia pre code {
  background-color: #1e1f1c;
}
.slide.theme-gaia code {
  background-color: #f2ede0;
  color: #8c2525;
}
.slide.theme-gaia blockquote {
  border-left-color: #8c2525;
  background-color: rgba(140, 37, 37, 0.04);
}
.slide.theme-gaia th {
  background-color: #f3ede2;
}

/* 3. Theme: Uncover (Bold Neon Centered) */
.slide.theme-uncover {
  background-color: #090e17;
  color: #f3f4f6;
  font-family: 'Outfit', sans-serif;
  justify-content: center;
  align-items: center;
  text-align: center;
}
.slide.theme-uncover h1, .slide.theme-uncover h2, .slide.theme-uncover h3 {
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  width: 100%;
}
.slide.theme-uncover h1 {
  font-size: 3rem;
  margin-bottom: 20px;
}
.slide.theme-uncover h2 {
  font-size: 2rem;
}
.slide.theme-uncover ul, .slide.theme-uncover ol {
  padding-left: 0;
  list-style-position: inside;
  display: inline-block;
  text-align: left;
}
.slide.theme-uncover blockquote {
  border-left: none;
  border-top: 4px solid #00f2fe;
  border-bottom: 4px solid #00f2fe;
  background-color: rgba(0, 242, 254, 0.03);
}

/* 4. Theme: Cyberpunk (Retro Neon Future) */
.slide.theme-cyberpunk {
  background-color: #06020f;
  color: #00ffcc;
  font-family: 'Fira Code', 'Outfit', monospace;
  border: 4px solid #ff007f;
  text-shadow: 0 0 4px rgba(0, 255, 204, 0.25);
}
.slide.theme-cyberpunk h1, .slide.theme-cyberpunk h2, .slide.theme-cyberpunk h3 {
  color: #ff007f;
  text-shadow: 0 0 10px rgba(255, 0, 127, 0.6);
  font-weight: 800;
  text-transform: uppercase;
}
.slide.theme-cyberpunk h1 {
  border-bottom: 3px double #ff007f;
  padding-bottom: 10px;
}
.slide.theme-cyberpunk code {
  background-color: #1a0b2e;
  color: #ffff00;
}
.slide.theme-cyberpunk pre code {
  background-color: #120520;
  border: 1px solid #ff007f;
  box-shadow: 0 0 8px rgba(255, 0, 127, 0.3);
}
.slide.theme-cyberpunk blockquote {
  border-left: 5px solid #ffff00;
  background-color: rgba(255, 255, 0, 0.05);
  color: #fff;
}
.slide.theme-cyberpunk table, .slide.theme-cyberpunk th, .slide.theme-cyberpunk td {
  border-color: #ff007f;
}

/* 5. Theme: Slate (Sleek Dark Developer) */
.slide.theme-slate {
  background-color: #0f172a;
  color: #f1f5f9;
  font-family: 'Outfit', 'Inter', sans-serif;
}
.slide.theme-slate h1, .slide.theme-slate h2, .slide.theme-slate h3 {
  color: #ffffff;
}
.slide.theme-slate h1 {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 12px;
}
.slide.theme-slate code {
  background-color: rgba(255, 255, 255, 0.1);
  color: #38bdf8;
}
.slide.theme-slate pre code {
  background-color: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.05);
}
.slide.theme-slate blockquote {
  border-left-color: #38bdf8;
  background-color: rgba(56, 189, 248, 0.04);
}

/* Slide Lead Class (Vertically Centered Single Slide layout) */
.slide.lead {
  justify-content: center;
  align-items: center;
  text-align: center;
}
.slide.lead h1 {
  font-size: 3.2rem;
  border-bottom: none;
  padding-bottom: 0;
}
.slide.lead h2 {
  font-size: 2.2rem;
}
.slide.lead ul, .slide.lead ol {
  padding-left: 0;
  list-style-position: inside;
  display: inline-block;
  text-align: left;
}

/* ==========================================================================
   Fullscreen presentation overlay
   ========================================================================== */

.presentation-fullscreen-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: #000;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.fullscreen-slide-viewport {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.presentation-floating-controls {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background-color: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.5), var(--shadow-neon);
  opacity: 1;
  transition: opacity 0.5s ease;
  z-index: 10001;
  backdrop-filter: blur(8px);
}

.presentation-floating-controls.idle {
  opacity: 0;
  pointer-events: none;
}

.floating-btn {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.floating-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--accent-blue);
  border-color: rgba(59, 130, 246, 0.3);
}

.floating-btn.active {
  background-color: var(--accent-blue);
  color: #fff;
  border-color: var(--accent-blue);
}

.floating-btn.btn-exit {
  background-color: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.2);
  color: #fca5a5;
}

.floating-btn.btn-exit:hover {
  background-color: rgba(239, 68, 68, 0.25);
  color: #fff;
}

.floating-page-indicator {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 0 6px;
}

.floating-divider {
  width: 1px;
  height: 20px;
  background-color: rgba(255, 255, 255, 0.15);
}

#fs-timer-text {
  font-size: 0.8rem;
  font-weight: 600;
  margin-left: 6px;
}

/* Laser Pointer Overlay */
.laser-pointer-cursor {
  position: absolute;
  width: 16px;
  height: 16px;
  background-color: #ff0000;
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: 10005;
  box-shadow: 0 0 15px 5px #ff0000, 0 0 30px 10px rgba(255, 0, 0, 0.5);
  display: none;
}

/* Slide Transitions (Applied on change in slide mode) */
.slide-transition-fade .slide {
  animation: animFade 0.4s ease-in-out forwards;
}

.slide-transition-slide .slide {
  animation: animSlide 0.4s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

.slide-transition-zoom .slide {
  animation: animZoom 0.45s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes animFade {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes animSlide {
  from { transform: translateX(80px) scale(0.95); opacity: 0.5; }
  to { transform: translateX(0) scale(1); opacity: 1; }
}

@keyframes animZoom {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* ==========================================================================
   Modals
   ========================================================================== */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(5px);
  animation: modalFadeIn 0.2s ease forwards;
}

@keyframes modalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-box {
  width: 90%;
  max-width: 680px;
  background-color: #111827;
  border: 1px solid var(--border-ui);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-lg), 0 20px 25px -5px rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: column;
  max-height: 85vh;
  transform: translateY(-20px);
  animation: modalSlideUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes modalSlideUp {
  to { transform: translateY(0); }
}

.modal-box.modal-small {
  max-width: 420px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-ui);
  padding-bottom: 12px;
}

.modal-header h2 {
  font-size: 1.15rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
}

.modal-close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.modal-close-btn:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.modal-body {
  overflow-y: auto;
  flex: 1;
}

.modal-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

/* Help modal styles */
.help-section {
  margin-bottom: 24px;
}

.help-section h3 {
  font-size: 0.95rem;
  color: var(--accent-blue);
  margin-bottom: 10px;
  font-weight: 600;
}

.help-section ul {
  padding-left: 20px;
  margin-bottom: 12px;
}

.help-section li {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.help-section code {
  background-color: rgba(255, 255, 255, 0.05);
  color: #38bdf8;
  font-family: monospace;
  padding: 1px 5px;
  border-radius: var(--radius-sm);
}

.help-section table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  margin-top: 8px;
}

.help-section th, .help-section td {
  border: 1px solid var(--border-ui);
  padding: 8px 12px;
  text-align: left;
}

.help-section th {
  background-color: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
  font-weight: 600;
}

.help-section td {
  color: var(--text-secondary);
}

.shortcuts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.shortcut-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  background-color: rgba(0, 0, 0, 0.15);
  padding: 8px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-ui);
}

.shortcut-item kbd {
  background-color: #374151;
  color: #fff;
  border: 1px solid #4b5563;
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  font-size: 0.72rem;
  box-shadow: 0 2px 0 rgba(0,0,0,0.3);
}

/* History Modal List */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.history-item-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-ui);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.history-item-card:hover {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: rgba(255,255,255,0.15);
}

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

.history-item-title {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-primary);
}

.history-item-meta {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.history-item-actions {
  display: flex;
  gap: 8px;
}

.no-history-msg {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 30px;
  font-style: italic;
}

.modal-actions-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  border-top: 1px solid var(--border-ui);
  padding-top: 16px;
  margin-top: 12px;
}

/* Directive Modal Form */
.directive-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-group input[type="text"],
.form-group select {
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-ui);
  color: var(--text-primary);
  padding: 10px 14px;
  font-size: 0.88rem;
  border-radius: var(--radius-md);
  outline: none;
  transition: var(--transition-fast);
}

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

/* ==========================================================================
   Responsive & Mobile Adjustments
   ========================================================================== */

@media (max-width: 1024px) {
  .sidebar-navigator {
    width: 60px; /* tiny sidebar icon view or hide */
    padding: 0;
  }
  .sidebar-header h3, .sidebar-header #btn-add-slide-sidebar, .nav-slide-card-badge {
    display: none;
  }
  .nav-slide-card {
    border-radius: var(--radius-sm);
  }
  .navigator-slides {
    padding: 10px 6px;
    gap: 8px;
  }
  .nav-slide-thumbnail-wrapper {
    display: none;
  }
  .nav-slide-card::after {
    content: attr(data-index);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-size: 0.9rem;
    font-weight: 700;
  }
}

@media (max-width: 768px) {
  .app-header {
    height: auto;
    flex-direction: column;
    padding: 12px;
    gap: 12px;
  }
  .header-actions {
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
  }
  .header-actions select {
    padding: 6px 24px 6px 8px;
  }
  .workspace-container {
    flex-direction: column;
    height: calc(100vh - 120px);
  }
  .sidebar-navigator {
    display: none; /* Hide slide thumbnails sidebar completely on phone */
  }
  .panel-editor, .panel-preview {
    width: 100% !important;
    height: 50% !important;
  }
  .workspace-resizer {
    height: 8px;
    width: 100%;
    cursor: row-resize;
  }
  .resizer-handle {
    transform: translate(-50%, -50%) rotate(90deg);
  }
  
  /* presentation mobile overlays */
  .presentation-floating-controls {
    bottom: 12px;
    padding: 6px 10px;
    gap: 6px;
    width: 90%;
    justify-content: space-around;
  }
  .floating-btn {
    width: 32px;
    height: 32px;
  }
  .presentation-floating-controls .floating-page-indicator {
    font-size: 0.8rem;
  }
  .presentation-floating-controls #fs-btn-laser,
  .presentation-floating-controls #fs-btn-confetti {
    display: none; /* hide laser pointer and confetti on mobile */
  }
}