/**
 * WT-Notes: app.css
 * Comprehensive stylesheet for Werktuigbouwkunde Technical Notes SPA.
 * Single-document focused layout (Notion-style), touch ergonomic (>=44px), zero horizontal overflow,
 * KaTeX formula protection, Dark/Light engineering theme, magic beautifier, and clean print engine.
 */

:root {
  /* Apple Human Interface Guidelines (HIG) Light Theme */
  --bg-app: #F5F5F7;           /* Apple System Light Gray */
  --bg-sidebar: #FFFFFF;       /* Apple clean sidebar surface */
  --bg-surface: #FFFFFF;       /* Pure White Container */
  --bg-surface-secondary: #F5F5F7;
  --bg-card: #FFFFFF;
  --bg-toolbar: rgba(255, 255, 255, 0.85); /* Glassmorphic backdrop-blur */
  --bg-input: #FFFFFF;
  --bg-code: #F2F2F7;          /* System Gray 6 */
  --border-color: rgba(0, 0, 0, 0.08); /* Apple subtle line */
  --border-strong: rgba(0, 0, 0, 0.16);
  --border-subtle: rgba(0, 0, 0, 0.04);
  --border-focus: #007AFF;
  
  --text-primary: #1D1D1F;      /* Apple Near Black */
  --text-secondary: #86868B;    /* Apple secondary gray */
  --text-muted: #86868B;
  --text-sidebar: #1D1D1F;
  --text-sidebar-muted: #86868B;

  /* Engineering Domain Colors (Muted Apple HIG compatible) */
  --color-statica: #007AFF;    /* Apple System Blue */
  --color-thermo: #FF3B30;     /* Apple System Red */
  --color-stroming: #5856D6;   /* Apple System Purple */
  --color-materiaal: #34C759;  /* Apple System Green */
  --color-constructie: #FF9500;/* Apple System Orange */
  --color-algemeen: #8E8E93;   /* Apple System Gray */

  --accent-color: #007AFF;
  --accent-hover: #0062CC;
  --accent-light: rgba(0, 122, 255, 0.08);
  --accent-primary: #007AFF;
  --accent-primary-hover: #0062CC;
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F5F7;
  --bg-tertiary: #E5E5EA;
  --success: #34C759;
  --warning: #FF9500;
  --danger: #FF3B30;

  --sidebar-width: 290px;
  --header-height: 56px;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  
  /* Apple Soft Diffuse Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
}

/* Apple Human Interface Guidelines (HIG) OLED Dark Theme */
[data-theme="dark"] {
  --bg-app: #000000;           /* Apple Pure OLED Black */
  --bg-sidebar: #121214;       /* Gelaagd Apple Dark Gray */
  --bg-surface: #1C1C1E;       /* Apple System Gray 6 Dark */
  --bg-surface-secondary: #2C2C2E;
  --bg-card: #2C2C2E;          /* Gelaagd donkergrijs met matte afwerking */
  --bg-toolbar: rgba(28, 28, 30, 0.85); /* Glassmorphic */
  --bg-input: #1C1C1E;
  --bg-code: #1C1C1E;
  --border-color: rgba(255, 255, 255, 0.10); /* border-white/10 */
  --border-strong: rgba(255, 255, 255, 0.18);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-focus: #0A84FF;

  --text-primary: #F5F5F7;      /* Helderwit */
  --text-secondary: #98989D;    /* Gedimd grijs */
  --text-muted: #98989D;
  --text-sidebar: #F5F5F7;
  --text-sidebar-muted: #98989D;

  --accent-color: #0A84FF;
  --accent-hover: #409CFF;
  --accent-light: rgba(10, 132, 255, 0.15);
  --accent-primary: #0A84FF;
  --accent-primary-hover: #409CFF;
  --bg-primary: #000000;
  --bg-secondary: #1C1C1E;
  --bg-tertiary: #2C2C2E;

  --success: #30D158;
  --warning: #FF9F0A;
  --danger: #FF453A;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.65);
}

/* Base Reset & Box Sizing */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  height: 100%;
  width: 100%;
  overflow-x: hidden;
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.5;
  font-size: 15px;
}

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

/* =========================================================================
   Sidebar: Clean Navigation (Zero Clutter)
   ========================================================================= */
.sidebar {
  width: var(--sidebar-width);
  height: 100%;
  background-color: var(--bg-sidebar);
  color: var(--text-sidebar);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  border-right: 1px solid var(--border-color);
  z-index: 100;
  transition: margin-left 0.25s cubic-bezier(0.4, 0, 0.2, 1), transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar.collapsed {
  margin-left: calc(-1 * var(--sidebar-width));
}

.sidebar-header {
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.btn-sidebar-collapse {
  width: 28px;
  height: 28px;
  min-width: 28px;
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  transition: all 0.15s ease;
}

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

.brand-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #2563eb, #0891b2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.05rem;
  color: #ffffff;
}

.sidebar-actions {
  display: flex;
  gap: 6px;
}

.btn-icon {
  min-height: 36px;
  min-width: 36px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-sidebar-muted);
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all 0.15s ease;
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

.btn-new-note {
  margin: 12px 14px;
  min-height: 40px;
  background: linear-gradient(135deg, var(--accent-color), #1d4ed8);
  color: #ffffff;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.25);
  transition: all 0.15s ease;
}

.btn-new-note:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.search-box {
  padding: 0 14px 10px 14px;
  position: relative;
}

.search-input {
  width: 100%;
  height: 36px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 6px;
  padding: 6px 12px 6px 34px;
  color: #ffffff;
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.15s ease;
}

.search-input:focus {
  border-color: var(--accent-color);
  background: rgba(255, 255, 255, 0.12);
}

.search-icon {
  position: absolute;
  left: 24px;
  top: 9px;
  font-size: 0.85rem;
  color: var(--text-sidebar-muted);
  pointer-events: none;
}

/* Category Filter Chips */
.category-filters {
  display: flex;
  gap: 5px;
  padding: 0 14px 10px 14px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}

.category-filters::-webkit-scrollbar {
  display: none;
}

.chip {
  padding: 4px 9px;
  border-radius: 16px;
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-sidebar-muted);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}

.chip:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
}

.chip.active {
  background: var(--accent-color);
  color: #ffffff;
}

/* Notes List */
.notes-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.note-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 10px 12px;
  cursor: pointer;
  transition: all 0.15s ease;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.note-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
}

.note-item.active {
  background: rgba(37, 99, 235, 0.18);
  border-color: var(--accent-color);
}

.note-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.note-item-title {
  font-weight: 600;
  font-size: 0.88rem;
  color: #ffffff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

.note-item-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  color: var(--text-sidebar-muted);
}

.badge {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
}

.badge-statica { background: rgba(37, 99, 235, 0.2); color: #60a5fa; border: 1px solid #3b82f6; }
.badge-thermo { background: rgba(220, 38, 38, 0.2); color: #f87171; border: 1px solid #ef4444; }
.badge-stroming { background: rgba(8, 145, 178, 0.2); color: #38bdf8; border: 1px solid #06b6d4; }
.badge-materiaal { background: rgba(5, 150, 105, 0.2); color: #34d399; border: 1px solid #10b981; }
.badge-constructie { background: rgba(217, 119, 6, 0.2); color: #fbbf24; border: 1px solid #f59e0b; }
.badge-algemeen { background: rgba(100, 116, 139, 0.2); color: #cbd5e1; border: 1px solid #64748b; }

.note-item-preview {
  font-size: 0.76rem;
  color: var(--text-sidebar-muted);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.empty-notes-state {
  padding: 24px 12px;
  text-align: center;
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 10px 14px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-btn-row {
  display: flex;
  gap: 6px;
}

.btn-sidebar-footer {
  flex: 1;
  min-height: 32px;
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.74rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  transition: all 0.15s ease;
}

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

/* =========================================================================
   Main Workspace: Single-Document Centered View
   ========================================================================= */
.main-workspace {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-width: 0;
  background: var(--bg-app);
  overflow: hidden;
}

.workspace-header {
  height: var(--header-height);
  padding: 0 20px;
  background: var(--bg-toolbar);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-shrink: 0;
  z-index: 50;
}

/* Sidebar eradication on home screen dashboard */
body.screen-dashboard #sidebar,
body.screen-dashboard #sidebar-backdrop,
body.screen-dashboard .btn-hamburger,
body.screen-dashboard #header-editor-view {
  display: none !important;
}

/* Screen Layout Containers */
.editor-screen-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  width: 100%;
  overflow: hidden;
}

.header-dashboard-view {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-editor-view {
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  overflow: hidden;
  justify-self: start;
}

.header-brand-tag {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  user-select: none;
  flex-shrink: 0;
}

.header-brand-icon {
  font-size: 1rem;
  color: var(--accent-primary);
  font-weight: 700;
}

.header-brand-name {
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.header-wtb-badge {
  font-size: 0.65rem;
  font-weight: 800;
  padding: 2px 5px;
  background: var(--accent-primary);
  color: #ffffff;
  border-radius: 4px;
  letter-spacing: 0.05em;
}

.wtb-pill-sidebar {
  font-size: 0.65rem;
  font-weight: 800;
  padding: 2px 6px;
  background: var(--accent-light);
  color: var(--accent-primary);
  border-radius: 4px;
  margin-left: 4px;
}

.btn-hamburger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  min-width: 32px;
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

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

.btn-back-dashboard {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 32px;
  padding: 0 12px;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

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

.btn-back-dashboard:active {
  transform: scale(0.96);
}

.dashboard-breadcrumb-tag {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-surface-secondary);
  padding: 4px 12px;
  border-radius: 9999px;
  border: 1px solid var(--border-color);
  margin-left: 10px;
}

.btn-dash-hero-primary {
  padding: 8px 18px;
  background: var(--accent-primary);
  color: #ffffff;
  border: none;
  border-radius: 12px;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.25);
  transition: all 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.btn-dash-hero-primary:hover {
  background: var(--accent-primary-hover);
  transform: translateY(-1px);
}

.btn-dash-hero-primary:active {
  transform: scale(0.96);
}

.header-doc-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  flex: 1 1 auto;
}

.note-title-input {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 4px 8px;
  width: 100%;
  min-width: 60px;
  max-width: 200px;
  flex: 1 1 auto;
  outline: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: all 0.15s ease;
}

.note-title-input:hover {
  background: var(--bg-surface-secondary);
}

.note-title-input:focus {
  background: var(--bg-surface);
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px var(--accent-light);
  max-width: 260px;
}

.note-category-select {
  height: 28px;
  padding: 0 8px;
  border-radius: 9999px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface-secondary);
  color: var(--text-secondary);
  font-size: 0.74rem;
  font-weight: 500;
  outline: none;
  max-width: 130px;
  flex-shrink: 1;
  text-overflow: ellipsis;
  cursor: pointer;
  transition: all 0.15s ease;
}

.note-category-select:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.header-center {
  display: flex;
  align-items: center;
  justify-content: center;
  justify-self: center;
  flex-shrink: 0;
}

/* Apple HIG Segmented Control: 3 Work Modes Switcher */
.work-mode-switcher {
  display: inline-flex;
  align-items: center;
  background: rgba(120, 120, 128, 0.12);
  border: 1px solid rgba(0, 0, 0, 0.04);
  border-radius: 9999px;
  padding: 3px;
  gap: 2px;
}

[data-theme="dark"] .work-mode-switcher {
  background: rgba(118, 118, 128, 0.22);
  border-color: rgba(255, 255, 255, 0.08);
}

.work-mode-pill {
  padding: 4px 14px;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 500;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
  white-space: nowrap;
}

.work-mode-pill:hover {
  color: var(--text-primary);
}

.work-mode-pill:active {
  transform: scale(0.96);
}

.work-mode-pill.active {
  background: #ffffff !important;
  color: #1D1D1F !important;
  font-weight: 600;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12), 0 0 1px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .work-mode-pill.active {
  background: #636366 !important;
  color: #ffffff !important;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
}

.header-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  justify-self: end;
  gap: 6px;
  min-width: 0;
  flex-shrink: 0;
}

.save-status-indicator {
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
  margin-left: 6px;
  flex-shrink: 0;
}

.toolkit-pill-group {
  display: inline-flex;
  align-items: center;
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  padding: 2px;
  gap: 2px;
}

.btn-toolkit {
  height: 26px;
  padding: 0 10px;
  background: transparent;
  border: none;
  border-radius: 9999px;
  font-size: 0.76rem;
  font-weight: 500;
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

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

.btn-toolkit:active {
  transform: scale(0.96);
}

.btn-subtle-hdr {
  height: 30px;
  padding: 0 12px;
  background: var(--bg-surface-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

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

.btn-subtle-hdr:active {
  transform: scale(0.96);
}

/* Apple HIG Segmented Theme Switch (Sun & Moon) */
.btn-theme-segmented {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 30px;
  padding: 2px;
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  border-radius: 980px;
  cursor: pointer;
  gap: 2px;
  box-sizing: border-box;
  outline: none;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  vertical-align: middle;
  user-select: none;
}

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

.btn-theme-segmented:active {
  transform: scale(0.96);
}

.theme-seg-option {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 24px;
  border-radius: 980px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.theme-icon-svg {
  display: block;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), stroke 0.2s ease;
}

/* Light Theme Active State (Sun highlighted) */
:root:not([data-theme="dark"]) .btn-theme-segmented .opt-sun {
  background: #ffffff;
  color: #ff9500;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 1px rgba(0, 0, 0, 0.06);
}

:root:not([data-theme="dark"]) .btn-theme-segmented .opt-moon {
  background: transparent;
  color: rgba(60, 60, 67, 0.45);
}

:root:not([data-theme="dark"]) .btn-theme-segmented:hover .opt-moon {
  color: rgba(60, 60, 67, 0.85);
}

/* Dark Theme Active State (Moon highlighted) */
[data-theme="dark"] .btn-theme-segmented {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.14);
}

[data-theme="dark"] .btn-theme-segmented .opt-sun {
  background: transparent;
  color: rgba(235, 235, 245, 0.35);
  box-shadow: none;
}

[data-theme="dark"] .btn-theme-segmented:hover .opt-sun {
  color: rgba(235, 235, 245, 0.75);
}

[data-theme="dark"] .btn-theme-segmented .opt-moon {
  background: #2C2C2E;
  color: #0A84FF;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5), inset 0 0 0 1px rgba(10, 132, 255, 0.3);
}

/* Compatibility anchors for test runners */
.btn-beautify {
  min-height: 32px;
  padding: 0 14px;
  background: var(--accent-primary);
  color: #ffffff;
  border: none;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.view-mode-switcher {
  display: inline-flex;
  background: var(--bg-toolbar);
  border: 1px solid var(--border-color);
  border-radius: 7px;
  padding: 3px;
  gap: 2px;
}

.view-mode-pill {
  padding: 4px 10px;
  border-radius: 5px;
  border: none;
  background: transparent;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.15s ease;
}

.view-mode-pill:hover {
  color: var(--text-primary);
}

.view-mode-pill.active {
  background: var(--bg-surface);
  color: var(--accent-primary);
}

/* =========================================================================
   Quick Formula & Formatting Toolbar ("De Snelle WT-Balk")
   ========================================================================= */
.editor-toolbar {
  padding: 6px 16px;
  background: var(--bg-toolbar);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.toolbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 32px;
}

.toolbar-left-group, .toolbar-right-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: nowrap;
}

.toolbar-pill-group {
  display: inline-flex;
  align-items: center;
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2px;
  gap: 1px;
}

.toolbar-btn {
  height: 26px;
  padding: 0 8px;
  background: transparent;
  border: none;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: all 0.15s ease;
  white-space: nowrap;
}

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

.toolbar-btn:active {
  transform: scale(0.95);
}

.btn-palette-toggle {
  height: 30px;
  padding: 0 10px;
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  transition: all 0.15s ease;
}

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

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

.palette-icon {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.btn-palette-toggle.active .palette-icon {
  color: #ffffff;
}

.btn-danger-action:hover {
  color: var(--danger) !important;
  background: rgba(255, 59, 48, 0.1) !important;
}

/* Formula Chips Ribbon (Collapsible) */
.formula-ribbon {
  display: none;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  white-space: nowrap;
  padding: 8px 4px 6px 4px;
  border-top: 1px solid var(--border-subtle);
  scrollbar-width: thin;
}

.formula-ribbon.open {
  display: flex;
  animation: ribbonSlideDown 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes ribbonSlideDown {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.formula-ribbon::-webkit-scrollbar {
  height: 4px;
}

.formula-ribbon::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 9999px;
}

.ribbon-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-right: 2px;
}

.formula-chip {
  padding: 4px 10px;
  border-radius: 9999px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface-secondary);
  font-size: 0.76rem;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  transition: all 0.15s ease;
}

.formula-chip:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: var(--accent-light);
  transform: translateY(-1px);
}

.formula-chip:active {
  transform: scale(0.96);
}

.formula-chip.greek {
  font-family: var(--font-mono);
  font-weight: 600;
  min-width: 28px;
  justify-content: center;
  color: #5856D6;
  background: rgba(88, 86, 214, 0.08);
  border-color: rgba(88, 86, 214, 0.2);
}

.formula-chip.greek:hover {
  background: #5856D6;
  color: #ffffff;
}

/* =========================================================================
   Single-Document Unified Workspace (Centered Notion/Docs style)
   ========================================================================= */
.editor-panes-container {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 0;
  overflow-y: auto;
  background: var(--bg-app);
  padding: 18px 24px 36px 24px;
  gap: 12px;
}

/* Both Panes centered as clean single sheets */
.editor-pane, .preview-pane {
  max-width: 880px;
  width: 100%;
  min-height: calc(100vh - 180px);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: visible;
  display: flex;
  flex-direction: column;
}

/* Live Math HUD: Floating Formula & Solution Inspector */
.live-math-hud {
  margin: 14px 20px 4px 20px;
  padding: 12px 16px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(99, 102, 241, 0.08));
  border: 1px solid rgba(37, 99, 235, 0.25);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
  animation: hudSlideDown 0.16s ease-out;
}

[data-theme="dark"] .live-math-hud {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.15), rgba(99, 102, 241, 0.12));
  border-color: rgba(56, 189, 248, 0.3);
}

@keyframes hudSlideDown {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.hud-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.hud-badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-color);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 4px;
}

.hud-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.hud-output {
  font-size: 1.15rem;
  color: var(--text-primary);
  min-height: 28px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hud-calc-hint {
  font-size: 0.85rem;
  color: #059669;
  font-weight: 600;
  margin-top: 4px;
}

[data-theme="dark"] .hud-calc-hint {
  color: #34d399;
}

.note-editor-textarea {
  flex: 1;
  width: 100%;
  min-height: calc(100vh - 200px);
  padding: 24px 28px;
  border: none;
  outline: none;
  resize: none;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  line-height: 1.75;
  tab-size: 2;
}

.note-preview-container {
  flex: 1;
  padding: 24px 32px;
  line-height: 1.6;
  font-size: 0.96rem;
  color: var(--text-primary);
}

/* Top Banner in Preview Mode */
.preview-mode-banner {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #ffffff;
  padding: 8px 16px;
  display: none;
  align-items: center;
  justify-content: space-between;
  border-radius: 9px 9px 0 0;
  font-size: 0.82rem;
  font-weight: 600;
}

.btn-preview-edit {
  background: #ffffff;
  color: #065f46;
  border: none;
  padding: 4px 12px;
  border-radius: 5px;
  font-weight: 700;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-preview-edit:hover {
  background: #ecfdf5;
}

/* Markdown & KaTeX Typography */
.note-preview-container h1 {
  font-size: 1.7rem;
  font-weight: 800;
  margin: 0 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-color);
  color: var(--accent-color);
}

.note-preview-container h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 22px 0 10px 0;
  color: var(--text-primary);
}

.note-preview-container h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 16px 0 6px 0;
}

.note-preview-container p {
  margin-bottom: 14px;
}

.note-preview-container ul, .note-preview-container ol {
  margin-left: 20px;
  margin-bottom: 14px;
}

.note-preview-container blockquote {
  border-left: 4px solid var(--accent-color);
  padding: 8px 14px;
  background: var(--bg-code);
  border-radius: 0 6px 6px 0;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.note-preview-container code {
  font-family: var(--font-mono);
  background: var(--bg-code);
  padding: 2px 5px;
  border-radius: 4px;
  font-size: 0.88em;
}

.note-preview-container pre {
  background: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 12px;
  overflow-x: auto;
  margin-bottom: 14px;
}

.note-preview-container img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  margin: 10px 0;
  box-shadow: var(--shadow-sm);
}

/* KaTeX Formula Handling: Crisp, Proportional Engineering Typography */
.katex-display {
  overflow-x: auto !important;
  overflow-y: hidden !important;
  padding: 6px 0 !important;
  margin: 10px 0 !important;
  text-align: left !important;
  padding-left: 10px !important;
  font-size: 1.05em !important;
}

.katex-display > .katex {
  text-align: left !important;
  font-size: 1.0em !important;
}

.katex {
  font-size: 1.0em !important;
}

/* Toast Notification Floating Pill */
.app-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(40px);
  background: #0f172a;
  color: #ffffff;
  padding: 10px 22px;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(0,0,0,0.3);
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(255,255,255,0.15);
}

.app-toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* =========================================================================
   Visual Formula Assistant (Modal & Catalog)
   ========================================================================= */
.fa-modal-content {
  max-width: 820px;
  width: 95vw;
}

.fa-tabs-bar {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
  margin-bottom: 14px;
}

.fa-tab-btn {
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

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

.fa-catalog-section {
  margin-bottom: 18px;
}

.fa-catalog-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.fa-catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 10px;
}

.fa-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px 12px;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.fa-card:hover {
  border-color: var(--accent-color);
  background: var(--accent-light);
  transform: translateY(-1px);
}

.fa-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.fa-card-name {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-primary);
}

.fa-card-btn {
  font-size: 0.72rem;
  color: var(--accent-color);
  font-weight: 700;
}

.fa-card-latex {
  padding: 6px 0;
  text-align: center;
  min-height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.fa-card-desc {
  font-size: 0.74rem;
  color: var(--text-muted);
}

.fa-builder-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.fa-builder-preview-box {
  background: var(--bg-toolbar);
  border: 2px dashed var(--accent-color);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

/* =========================================================================
   Modals & Engineering Tool Dialogs
   ========================================================================= */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.40);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s cubic-bezier(0.25, 0.1, 0.25, 1);
}

[data-theme="dark"] .modal-backdrop {
  background: rgba(0, 0, 0, 0.75);
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.22);
  width: 100%;
  max-width: 620px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.96) translateY(8px);
  transition: all 0.25s cubic-bezier(0.25, 0.1, 0.25, 1);
}

[data-theme="dark"] .modal-box {
  background: #1C1C1E;
  border-color: rgba(255, 255, 255, 0.10);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.7);
}

.modal-backdrop.open .modal-box {
  transform: scale(1) translateY(0);
}

.modal-header {
  padding: 18px 22px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.01em;
}

.modal-body {
  padding: 20px 22px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-footer {
  padding: 14px 22px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* Unit Converter & Formula Helper Input Forms */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

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

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

.form-control {
  height: 42px;
  padding: 0 12px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface-secondary);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: all 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.form-control:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.calc-result-box {
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 18px;
  text-align: center;
}

.calc-result-val {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 2px;
  letter-spacing: -0.02em;
}

/* Template Cards Grid */
.templates-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.template-card {
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 16px;
  background: var(--bg-surface);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.template-card:hover {
  border-color: var(--accent-primary);
  background: var(--accent-light);
  transform: translateY(-1px);
}

.template-card:active {
  transform: scale(0.98);
}
}

.template-card-title {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.template-card-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* =========================================================================
   Responsive Breakpoints & Layout Adaptations
   ========================================================================= */
@media (max-width: 1080px) {
  .header-editor-view {
    gap: 8px;
  }
  .note-title-input {
    max-width: 140px;
  }
  .note-category-select {
    max-width: 110px;
  }
  .btn-toolkit {
    padding: 0 8px;
    font-size: 0.74rem;
  }
  .toolbar-row {
    gap: 8px;
  }
}

@media (max-width: 768px) {
  .btn-hamburger {
    display: inline-flex;
  }

  .sidebar {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    transform: translateX(-100%);
    box-shadow: 4px 0 15px rgba(0, 0, 0, 0.3);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
  }

  .sidebar-backdrop.open {
    display: block;
  }

  .workspace-header {
    padding: 0 10px;
  }

  .header-editor-view {
    gap: 6px;
  }

  .note-title-input {
    font-size: 0.88rem;
    max-width: 120px;
  }

  .note-category-select {
    display: none;
  }

  .work-mode-pill {
    padding: 3px 10px;
    font-size: 0.75rem;
  }

  .btn-toolkit {
    padding: 0 6px;
    font-size: 0.72rem;
  }

  .editor-toolbar {
    padding: 6px 10px;
  }

  .toolbar-row {
    flex-wrap: wrap;
    gap: 6px;
  }

  .editor-panes-container {
    padding: 8px;
  }

  .editor-pane, .preview-pane {
    min-height: calc(100vh - 170px);
  }

  .note-editor-textarea {
    padding: 16px;
  }

  .note-preview-container {
    padding: 16px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .btn-back-dashboard span {
    display: none;
  }
  .btn-back-dashboard {
    padding: 0 8px;
  }
  .save-status-indicator {
    display: none;
  }
}

/* =========================================================================
   Navigation Screen Switcher & Dashboard Header Styles
   ========================================================================= */
.nav-screen-switcher {
  display: flex;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2px;
  gap: 2px;
  margin-right: 8px;
}

.btn-nav-screen {
  padding: 5px 12px;
  border-radius: 6px;
  border: none;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  color: var(--text-secondary);
  background: transparent;
}

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

.btn-nav-screen.active {
  background: #0284c7 !important;
  color: #ffffff !important;
  box-shadow: 0 1px 4px rgba(2, 132, 199, 0.3);
}

.btn-nav-dashboard-sidebar {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 12px;
  margin-bottom: 12px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.btn-nav-dashboard-sidebar:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent-primary);
}

.btn-export-report {
  background: #059669;
  color: #ffffff;
  border: none;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
  display: flex;
  align-items: center;
  gap: 4px;
}

.btn-export-report:hover {
  background: #047857;
}

/* =========================================================================
   Screen 1: Projects Dashboard Styles
   ========================================================================= */
.dashboard-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  width: 100%;
  padding: 24px 32px;
  overflow-y: auto;
  background: var(--bg-app);
}

/* Mode 3: In-Workspace Rapportage Pane */
.report-pane {
  max-width: 900px;
  width: 100%;
  min-height: calc(100vh - 180px);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  box-shadow: var(--shadow-md);
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.report-workspace-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 12px 18px;
  background: var(--bg-toolbar);
  border-bottom: 1px solid var(--border-color);
}

.report-workspace-meta {
  display: flex;
  gap: 8px;
  flex: 1;
  min-width: 280px;
}

.report-workspace-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.report-paper-wrapper {
  padding: 24px;
  overflow-y: auto;
  flex: 1;
  background: var(--bg-app);
}

.dashboard-hero {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding: 28px 32px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

[data-theme="dark"] .dashboard-hero {
  background: #1C1C1E;
  border-color: rgba(255, 255, 255, 0.10);
}

.dashboard-hero-text h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  letter-spacing: -0.015em;
}

.dashboard-hero-text p {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.dashboard-hero-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn-dash-primary {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-primary);
  color: #ffffff;
  border: none;
  padding: 10px 20px;
  border-radius: 12px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.25);
  transition: all 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

.btn-dash-primary:active {
  transform: scale(0.96);
}

.btn-dash-secondary {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-surface-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 10px 16px;
  border-radius: 12px;
  font-size: 0.84rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

.btn-dash-secondary:active {
  transform: scale(0.96);
}

.dashboard-filter-section {
  margin-bottom: 20px;
}

.discipline-tabs-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.disc-tab {
  padding: 8px 18px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.disc-tab:hover {
  color: var(--text-primary);
  background: var(--bg-surface-secondary);
}

.disc-tab:active {
  transform: scale(0.96);
}

.disc-tab.active {
  background: #007AFF !important;
  color: #ffffff !important;
  border-color: #007AFF !important;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.25);
}

[data-theme="dark"] .disc-tab.active {
  background: #0A84FF !important;
  color: #ffffff !important;
  border-color: #0A84FF !important;
  box-shadow: 0 2px 8px rgba(10, 132, 255, 0.35);
}

.dash-search-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.subcategories-chip-bar {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
}

.dash-subcat-chip {
  padding: 5px 16px;
  border-radius: 9999px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.dash-subcat-chip:hover {
  color: var(--text-primary);
  background: var(--bg-surface-secondary);
}

.dash-subcat-chip:active {
  transform: scale(0.95);
}

.dash-subcat-chip.active {
  background: #1D1D1F !important;
  color: #ffffff !important;
  border-color: #1D1D1F !important;
  font-weight: 600;
}

[data-theme="dark"] .dash-subcat-chip.active {
  background: #F5F5F7 !important;
  color: #000000 !important;
  border-color: #F5F5F7 !important;
  font-weight: 600;
}

.dash-search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 8px 14px;
  min-width: 280px;
  transition: all 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.dash-search-box:focus-within {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.dash-search-box input {
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 0.84rem;
  outline: none;
  width: 100%;
}

.dash-section-header {
  margin-bottom: 14px;
}

.dash-projects-count {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.dashboard-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 16px;
  margin-bottom: 40px;
}

.dash-project-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
  cursor: pointer;
}

[data-theme="dark"] .dash-project-card {
  background: #2C2C2E;
  border-color: rgba(255, 255, 255, 0.10);
}

.dash-project-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-primary);
}

.dash-project-card:active {
  transform: scale(0.98);
}

.dash-project-card.is-pinned {
  border-left: 4px solid var(--warning);
}

.card-top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.card-quick-actions {
  display: flex;
  gap: 4px;
}

.btn-card-icon {
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  padding: 4px;
  border-radius: 4px;
  color: var(--text-muted);
  transition: background 0.1s, color 0.1s;
}

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

.btn-card-icon.danger:hover {
  color: var(--danger);
}

.card-project-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.3;
}

.card-project-preview {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
  flex: 1;
}

.card-footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
  margin-top: 6px;
}

.card-meta-info {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.74rem;
  color: var(--text-muted);
}

.card-vls-pill {
  background: rgba(2, 132, 199, 0.12);
  color: #0284c7;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.7rem;
}

.card-btn-group {
  display: flex;
  gap: 6px;
}

.btn-card-report {
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.76rem;
  font-weight: 500;
  padding: 5px 10px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

.btn-card-report:active {
  transform: scale(0.96);
}

.btn-card-open {
  background: var(--accent-primary);
  color: #ffffff;
  border: none;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

.btn-card-open:active {
  transform: scale(0.96);
}

.dash-empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 24px;
  background: var(--bg-surface);
  border: 1px dashed var(--border-color);
  border-radius: 20px;
}

/* =========================================================================
   Report Export Modal Styles
   ========================================================================= */
.report-modal-content {
  max-width: 920px;
  width: 95%;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
  overflow: hidden;
}

[data-theme="dark"] .report-modal-content {
  background: #1C1C1E;
  border-color: rgba(255, 255, 255, 0.10);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.75);
}

.report-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 22px;
  border-bottom: 1px solid var(--border-color);
}

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

.btn-report-act {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 7px 14px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface-secondary);
  color: var(--text-primary);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

.btn-report-act:active {
  transform: scale(0.96);
}

.btn-report-act.primary-cta {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
  font-weight: 600;
}

.btn-report-act.primary-cta:hover {
  background: var(--accent-primary-hover);
}

.report-preview-scroll-area {
  overflow-y: auto;
  padding: 24px 16px;
  background: var(--bg-app);
  flex: 1;
}

[data-theme="dark"] .report-preview-scroll-area {
  background: #000000;
}

.report-paper-sheet {
  max-width: 780px;
  margin: 0 auto;
  background: #ffffff;
  color: #1D1D1F;
  padding: 48px;
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.6;
}

.report-header-banner {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 2px solid #0284c7;
  padding-bottom: 12px;
  margin-bottom: 20px;
}

.report-brand-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: #0284c7;
  letter-spacing: 0.05em;
}

.report-brand-sub {
  font-size: 0.72rem;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.report-org-info {
  text-align: right;
  font-size: 0.8rem;
  color: #64748b;
  line-height: 1.4;
}

table.report-title-block {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
  font-size: 0.84rem;
}

table.report-title-block td {
  border: 1px solid #cbd5e1;
  padding: 6px 10px;
}

table.report-title-block .tb-label {
  background: #f1f5f9;
  font-weight: 600;
  width: 20%;
  color: #334155;
}

.report-content-body {
  margin-bottom: 36px;
  font-size: 0.95rem;
}

.report-content-body h1 {
  font-size: 1.35rem;
  color: #0f172a;
  border-bottom: 1px solid #e2e8f0;
  padding-bottom: 4px;
  margin-top: 22px;
  margin-bottom: 12px;
}

.report-content-body h2 {
  font-size: 1.15rem;
  color: #1e293b;
  margin-top: 18px;
  margin-bottom: 10px;
}

.report-content-body h3 {
  font-size: 1rem;
  color: #0284c7;
  margin-top: 14px;
  margin-bottom: 8px;
}

.report-signoff-block {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid #cbd5e1;
  padding-top: 24px;
  margin-top: 36px;
}

.signoff-box {
  flex: 1;
  border: 1px dashed #94a3b8;
  border-radius: 6px;
  padding: 14px;
}

.signoff-title {
  font-size: 0.84rem;
  font-weight: 600;
  color: #475569;
  margin-bottom: 24px;
}

.signoff-line {
  border-bottom: 1px solid #0f172a;
  margin-bottom: 8px;
  height: 16px;
}

.signoff-sub {
  font-size: 0.74rem;
  color: #64748b;
}

.report-watermark {
  text-align: center;
  font-size: 0.72rem;
  color: #94a3b8;
  margin-top: 24px;
  border-top: 1px solid #f1f5f9;
  padding-top: 12px;
}

/* =========================================================================
   Print & PDF Export Styling (@media print)
   ========================================================================= */
/* ==========================================================================
   VLS Diagram Dock (Invoer Mode) & Rendered Figure Cards (Preview/Report)
   ========================================================================== */
.editor-vls-dock {
  margin: 14px 18px 4px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.vls-dock-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.vls-dock-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--bg-surface-secondary);
  border-bottom: 1px solid var(--border-color);
}

.vls-dock-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.vls-dock-badge {
  background: var(--color-primary);
  color: #ffffff;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

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

.vls-dock-actions {
  display: flex;
  gap: 6px;
}

.vls-dock-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 3px 8px;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.vls-dock-btn:hover {
  background: var(--bg-surface-secondary);
  border-color: var(--border-focus);
  color: var(--text-primary);
}

.vls-dock-btn.danger {
  color: #ef4444;
}

.vls-dock-btn.danger:hover {
  background: rgba(239, 68, 68, 0.1);
  border-color: #ef4444;
}

.vls-dock-img-wrapper {
  background: var(--bg-app);
  padding: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.vls-dock-img {
  max-width: 100%;
  max-height: 380px;
  height: auto;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  background: #ffffff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* VLS Diagram Card for KaTeX Preview and Report Pane */
.vls-diagram-card {
  margin: 16px 0;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  overflow: hidden;
  background: #ffffff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.vls-diagram-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: #f1f5f9;
  border-bottom: 1px solid #e2e8f0;
}

.vls-diagram-badge {
  background: #0284c7;
  color: #ffffff;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.vls-diagram-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: #1e293b;
}

.vls-rendered-img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  padding: 12px;
  background: #ffffff;
}

.vls-diagram-placeholder {
  padding: 24px;
  text-align: center;
  color: #64748b;
  font-size: 0.85rem;
  background: #f8fafc;
}

[data-theme="dark"] .vls-diagram-card {
  background: #1e293b;
  border-color: #334155;
}

[data-theme="dark"] .vls-diagram-header {
  background: #0f172a;
  border-bottom-color: #334155;
}

[data-theme="dark"] .vls-diagram-title {
  color: #f8fafc;
}

[data-theme="dark"] .vls-diagram-placeholder {
  background: #0f172a;
  color: #94a3b8;
}

/* =========================================================================
   Apple HIG Live Formula Detection Toast & Indicator
   ========================================================================= */
.apple-live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 122, 255, 0.10);
  color: var(--accent-primary);
  border: 1px solid rgba(0, 122, 255, 0.22);
  padding: 4px 14px;
  border-radius: 9999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  opacity: 0;
  transform: translateY(-4px) scale(0.96);
  transition: all 0.25s cubic-bezier(0.25, 0.1, 0.25, 1);
  pointer-events: none;
}

.apple-live-badge.active {
  opacity: 1;
  transform: translateY(0) scale(1);
}

[data-theme="dark"] .apple-live-badge {
  background: rgba(10, 132, 255, 0.18);
  border-color: rgba(10, 132, 255, 0.35);
  color: #38bdf8;
}

/* ==========================================================================
   Apple HIG Firebase Authentication & Cloud Sync Styling
   ========================================================================== */

.btn-auth-trigger {
  font-weight: 500;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.header-user-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  font-size: 0.78rem;
  max-width: 240px;
  transition: all 0.2s ease;
}

.user-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #30D158;
  box-shadow: 0 0 6px rgba(48, 209, 88, 0.5);
  flex-shrink: 0;
}

.user-email-label {
  color: var(--text-primary);
  font-weight: 500;
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cloud-sync-chip {
  display: inline-flex;
  align-items: center;
  font-size: 0.68rem;
  font-weight: 600;
  color: #007AFF;
  background: rgba(0, 122, 255, 0.12);
  padding: 1px 7px;
  border-radius: 9999px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  flex-shrink: 0;
}

[data-theme="dark"] .cloud-sync-chip {
  color: #0A84FF;
  background: rgba(10, 132, 255, 0.18);
}

.btn-logout-hdr {
  background: none;
  border: none;
  padding: 2px 7px;
  border-radius: 6px;
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-logout-hdr:hover {
  color: var(--danger);
  background: rgba(255, 59, 48, 0.08);
}

.auth-modal-box {
  max-width: 440px;
  width: 90%;
  border-radius: 24px;
  padding: 0;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
}

.auth-header-copy {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.auth-brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: 9999px;
  background: var(--accent-light);
  color: var(--accent-color);
  font-size: 0.72rem;
  font-weight: 600;
  width: fit-content;
  margin-bottom: 4px;
}

.auth-brand-icon {
  font-size: 0.8rem;
  font-weight: 700;
}

.auth-subtitle {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.4;
}

.auth-modal-body {
  padding: 20px 24px 28px 24px;
}

.auth-tab-row {
  display: flex;
  background: var(--bg-surface-secondary);
  padding: 3px;
  border-radius: 12px;
  margin-bottom: 20px;
  border: 1px solid var(--border-color);
}

.auth-tab-pill {
  flex: 1;
  border: none;
  background: transparent;
  padding: 8px 12px;
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 9px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.auth-tab-pill.active {
  background: var(--bg-surface);
  color: var(--text-primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.auth-alert {
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 0.82rem;
  line-height: 1.4;
  margin-bottom: 16px;
  display: none;
}

.auth-alert.error {
  background: rgba(255, 59, 48, 0.1);
  color: var(--danger);
  border: 1px solid rgba(255, 59, 48, 0.2);
}

.auth-alert.success {
  background: rgba(52, 199, 89, 0.1);
  color: var(--success);
  border: 1px solid rgba(52, 199, 89, 0.2);
}

.auth-input {
  width: 100%;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 0.9rem;
  box-sizing: border-box;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.auth-input:focus {
  border-color: var(--accent-color);
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-light);
}

.btn-auth-submit {
  width: 100%;
  padding: 12px 18px;
  background: var(--accent-color);
  color: #FFFFFF;
  border: none;
  border-radius: 14px;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-auth-submit:hover {
  background: var(--accent-hover);
}

.btn-auth-submit:active {
  transform: scale(0.98);
}

.btn-auth-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-google-auth {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 11px 16px;
  border-radius: 14px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-sm);
  margin-bottom: 6px;
  box-sizing: border-box;
}

.btn-google-auth:hover {
  background: var(--border-color);
  transform: translateY(-1px);
}

.btn-google-auth:active {
  transform: scale(0.98);
}

.btn-google-auth:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-google-auth .google-icon {
  flex-shrink: 0;
}

.auth-divider {
  display: flex;
  align-items: center;
  margin: 18px 0;
  color: var(--text-muted);
  font-size: 0.76rem;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-color);
}

.auth-divider span {
  padding: 0 10px;
}

.btn-guest-offline {
  width: 100%;
  padding: 10px 16px;
  background: var(--bg-surface-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-guest-offline:hover {
  color: var(--text-primary);
  background: var(--border-color);
}

.btn-guest-offline:active {
  transform: scale(0.98);
}

/* Mandatory Auth Gate & Cloud Status */
.modal-backdrop.mandatory-gate {
  display: flex !important;
  opacity: 1 !important;
  visibility: visible !important;
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  background: rgba(0, 0, 0, 0.72) !important;
  z-index: 99999 !important;
  pointer-events: auto !important;
}

[data-theme="dark"] .modal-backdrop.mandatory-gate {
  background: rgba(0, 0, 0, 0.85) !important;
}

.modal-backdrop.mandatory-gate .auth-modal-box {
  animation: appleGateAppear 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes appleGateAppear {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(8px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.sidebar-cloud-sync-status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 12px;
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  width: 100%;
  box-sizing: border-box;
}

.cloud-sync-label {
  font-size: 0.76rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: -0.01em;
}

@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 11pt;
    line-height: 1.5;
  }

  .sidebar,
  .workspace-header,
  .editor-toolbar,
  .formula-ribbon,
  .modal-backdrop:not(#export-report-modal),
  .modal-header,
  .modal-footer,
  .report-modal-header,
  .btn-toolkit,
  .btn-hamburger,
  .nav-screen-switcher,
  .view-mode-switcher,
  .app-toast,
  #screen-dashboard,
  #screen-editor {
    display: none !important;
  }

  #export-report-modal {
    display: block !important;
    position: static !important;
    background: transparent !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .report-modal-content {
    max-width: 100% !important;
    width: 100% !important;
    box-shadow: none !important;
    border: none !important;
    padding: 0 !important;
    margin: 0 !important;
    max-height: none !important;
  }

  .report-preview-scroll-area {
    background: transparent !important;
    padding: 0 !important;
    overflow: visible !important;
  }

  .report-paper-sheet {
    max-width: 100% !important;
    box-shadow: none !important;
    border: none !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .katex {
    color: #000000 !important;
  }

  .vls-diagram-card,
  img {
    max-width: 100% !important;
    page-break-inside: avoid;
  }
}

/* =========================================================================
   Home Screen & Landing Page (Apple HIG Aesthetic)
   ========================================================================= */
.home-screen-container {
  width: 100%;
  min-height: 100vh;
  background: var(--bg-app);
  color: var(--text-primary);
  overflow-x: hidden;
  position: relative;
  box-sizing: border-box;
}

body.screen-home {
  overflow-y: auto !important;
}

body.screen-home #sidebar,
body.screen-home #sidebar-backdrop,
body.screen-home .workspace-header {
  display: none !important;
}

body.screen-home .main-workspace {
  margin-left: 0 !important;
  width: 100% !important;
  max-width: 100% !important;
}

/* Logo Image Elements */
.brand-logo-img {
  width: 24px;
  height: 24px;
  object-fit: contain;
  border-radius: 6px;
  display: inline-block;
  vertical-align: middle;
}

.auth-logo-icon {
  width: 24px;
  height: 24px;
  object-fit: contain;
  border-radius: 6px;
}

[data-theme="dark"] .brand-logo-img,
[data-theme="dark"] .auth-logo-icon,
[data-theme="dark"] .home-nav-logo-full,
[data-theme="dark"] .footer-logo {
  filter: brightness(0) invert(1);
}

/* Home Navbar */
.home-navbar {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: background 0.3s ease, border-color 0.3s ease;
}

[data-theme="dark"] .home-navbar {
  background: rgba(18, 18, 18, 0.85);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.home-navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.home-nav-brand {
  display: flex;
  align-items: center;
  cursor: pointer;
  text-decoration: none;
}

.home-nav-logo-full {
  height: 32px;
  width: auto;
  object-fit: contain;
  transition: transform 0.2s ease;
}

.home-nav-brand:hover .home-nav-logo-full {
  transform: scale(1.02);
}

.home-nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

@media (max-width: 820px) {
  .home-nav-links {
    display: none;
  }
}

.home-nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

.home-nav-link:hover {
  color: var(--accent-primary);
}

.home-nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-home-subtle {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 7px 14px;
  border-radius: 980px;
  font-size: 0.84rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-home-subtle:hover {
  background: var(--bg-surface-secondary);
}

.home-nav-action-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-home-secondary-nav {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 7px 16px;
  border-radius: 980px;
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-home-secondary-nav:hover {
  background: var(--bg-surface-secondary);
  border-color: var(--accent-primary);
}

.btn-home-primary-nav {
  background: var(--accent-primary);
  color: #ffffff;
  border: none;
  padding: 8px 18px;
  border-radius: 980px;
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.25);
  transition: all 0.15s ease;
}

.btn-home-primary-nav:hover {
  background: #0062cc;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(0, 122, 255, 0.35);
}

.btn-home-app-nav {
  background: var(--accent-primary);
  color: #ffffff;
  border: none;
  padding: 8px 20px;
  border-radius: 980px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 2px 10px rgba(0, 122, 255, 0.3);
  transition: all 0.15s ease;
}

.btn-home-app-nav:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.4);
}

.home-user-greeting {
  font-size: 0.84rem;
  color: var(--text-secondary);
  font-weight: 500;
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Home Hero Section */
.home-hero-wrap {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  padding: 64px 24px 50px;
  text-align: center;
}

.home-hero-glow {
  position: absolute;
  top: -60px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 122, 255, 0.18) 0%, rgba(0, 122, 255, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

[data-theme="dark"] .home-hero-glow {
  background: radial-gradient(circle, rgba(10, 132, 255, 0.22) 0%, rgba(10, 132, 255, 0) 70%);
}

.home-hero-content {
  position: relative;
  z-index: 1;
}

.home-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 980px;
  background: rgba(0, 122, 255, 0.08);
  border: 1px solid rgba(0, 122, 255, 0.2);
  color: var(--accent-primary);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 24px;
}

[data-theme="dark"] .home-badge-pill {
  background: rgba(10, 132, 255, 0.14);
  border-color: rgba(10, 132, 255, 0.3);
}

.badge-dot-live {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #34C759;
  box-shadow: 0 0 8px #34C759;
}

.home-hero-title {
  font-size: 3.4rem;
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.035em;
  color: var(--text-primary);
  margin-bottom: 20px;
}

@media (max-width: 768px) {
  .home-hero-title {
    font-size: 2.3rem;
  }
}

.hero-gradient-text {
  background: linear-gradient(135deg, #007AFF 0%, #5856D6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .hero-gradient-text {
  background: linear-gradient(135deg, #0A84FF 0%, #BF5AF2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.home-hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 36px;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.home-hero-cta-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}

.btn-hero-primary {
  background: var(--accent-primary);
  color: #ffffff;
  border: none;
  padding: 13px 28px;
  border-radius: 980px;
  font-size: 1.02rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  box-shadow: 0 4px 18px rgba(0, 122, 255, 0.35);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-hero-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 122, 255, 0.45);
}

.btn-hero-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 13px 26px;
  border-radius: 980px;
  font-size: 1.02rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-hero-secondary:hover {
  background: var(--bg-surface-secondary);
  border-color: var(--accent-primary);
  transform: translateY(-1px);
}

.home-trust-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.trust-pill {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.trust-icon {
  color: #34C759;
  font-weight: 700;
  font-size: 0.9rem;
}

/* Home Section Layout */
.home-section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 36px;
}

.home-section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  margin-bottom: 8px;
}

.home-section-title {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

@media (max-width: 768px) {
  .home-section-title {
    font-size: 1.7rem;
  }
}

.home-section-desc {
  font-size: 1.02rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* Interactive Demo Section */
.home-demo-section {
  max-width: 1040px;
  margin: 0 auto 80px;
  padding: 0 24px;
}

.home-demo-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.06);
  transition: box-shadow 0.3s ease;
}

[data-theme="dark"] .home-demo-card {
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.demo-card-header {
  background: var(--bg-surface-secondary);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  gap: 14px;
}

.demo-window-controls {
  display: flex;
  gap: 6px;
}

.win-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.dot-red { background: #FF5F56; }
.dot-yellow { background: #FFBD2E; }
.dot-green { background: #27C93F; }

.demo-window-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  flex: 1;
  text-align: center;
}

.demo-status-badge {
  font-size: 0.74rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 980px;
  background: rgba(52, 199, 89, 0.15);
  color: #34C759;
}

.demo-card-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 270px;
}

@media (max-width: 768px) {
  .demo-card-body {
    grid-template-columns: 1fr;
  }
}

.demo-pane {
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.demo-input-pane {
  border-right: 1px solid var(--border-color);
  background: var(--bg-card);
}

@media (max-width: 768px) {
  .demo-input-pane {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
}

.demo-pane-header {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.demo-input-wrapper {
  margin-bottom: 16px;
}

.demo-text-input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface-secondary);
  color: var(--text-primary);
  font-family: var(--font-mono, monospace);
  font-size: 1.05rem;
  box-sizing: border-box;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.demo-text-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
}

.demo-chips-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-weight: 500;
}

.demo-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.demo-chip {
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-mono, monospace);
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.demo-chip:hover {
  background: rgba(0, 122, 255, 0.1);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.demo-output-pane {
  background: var(--bg-surface-secondary);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.demo-result-text {
  font-family: var(--font-mono, monospace);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.demo-result-math {
  font-size: 1.25rem;
  margin-bottom: 16px;
  min-height: 48px;
  display: flex;
  align-items: center;
}

.demo-result-hint {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.4;
  margin-top: auto;
  border-top: 1px dashed var(--border-color);
  padding-top: 12px;
}

/* Features Grid */
.home-features-section {
  max-width: 1140px;
  margin: 0 auto 90px;
  padding: 0 24px;
}

.home-grid-6 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 992px) {
  .home-grid-6 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .home-grid-6 {
    grid-template-columns: 1fr;
  }
}

.home-feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 28px 24px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.home-feature-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 122, 255, 0.4);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.06);
}

[data-theme="dark"] .home-feature-card:hover {
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.feature-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(0, 122, 255, 0.1);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.feature-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.feature-text {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

.feature-text code {
  font-family: var(--font-mono, monospace);
  background: var(--bg-surface-secondary);
  padding: 2px 5px;
  border-radius: 4px;
  font-size: 0.85em;
}

/* Disciplines Section */
.home-disciplines-section {
  max-width: 1140px;
  margin: 0 auto 90px;
  padding: 0 24px;
}

.disciplines-pills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

@media (max-width: 900px) {
  .disciplines-pills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .disciplines-pills-grid {
    grid-template-columns: 1fr;
  }
}

.discipline-showcase-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 22px;
  transition: transform 0.15s ease;
}

.discipline-showcase-card:hover {
  transform: translateY(-2px);
}

.disc-card-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 980px;
  margin-bottom: 12px;
}

.discipline-showcase-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.discipline-showcase-card p {
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* Bottom CTA Card */
.home-bottom-cta {
  max-width: 960px;
  margin: 0 auto 80px;
  padding: 0 24px;
}

.home-bottom-cta-box {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 24px;
  padding: 54px 36px;
  text-align: center;
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

.cta-logo-icon {
  width: 50px;
  height: 50px;
  object-fit: contain;
  margin-bottom: 20px;
}

.home-bottom-cta-box h2 {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 12px;
}

.home-bottom-cta-box p {
  font-size: 1.05rem;
  color: #94a3b8;
  max-width: 600px;
  margin: 0 auto 32px;
}

.btn-cta-large {
  background: #007AFF;
  color: #ffffff;
  border: none;
  padding: 14px 32px;
  border-radius: 980px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  box-shadow: 0 4px 18px rgba(0, 122, 255, 0.4);
  transition: all 0.2s ease;
}

.btn-cta-large:hover {
  transform: translateY(-2px);
  background: #0062cc;
  box-shadow: 0 6px 24px rgba(0, 122, 255, 0.5);
}

/* Home Footer */
.home-footer {
  border-top: 1px solid var(--border-color);
  background: var(--bg-card);
  padding: 36px 24px;
}

.home-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-logo {
  height: 26px;
  width: auto;
  object-fit: contain;
}

.footer-left p {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.footer-right {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.footer-version {
  font-weight: 600;
  color: var(--accent-primary);
}

.footer-dot {
  color: var(--border-color);
}

/* Sidebar Nav Button for Home */
.btn-nav-home-sidebar {
  width: calc(100% - 24px);
  margin: 0 12px 10px 12px;
  padding: 8px 14px;
  border-radius: 10px;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.15s ease;
}

.btn-nav-home-sidebar:hover {
  background: var(--bg-surface-secondary);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}