/* ==========================================================================
   YUVA NOTES — DESIGN SYSTEM
   Youth Vision in Action • Modern Clean Light Workspace
   STRICT LIGHT MODE ONLY (No dark styles under any circumstances)
   ========================================================================== */

:root {
  /* Force light color scheme */
  color-scheme: light;

  /* Pure & Soft iOS Light Canvas Surfaces */
  --bg-app: #F8F9FC;
  --bg-canvas: #F4F6FB;
  --bg-surface: #FFFFFF;
  --bg-surface-translucent: rgba(255, 255, 255, 0.82);
  --bg-surface-glass: rgba(255, 255, 255, 0.72);
  --bg-subtle: #F1F3F8;
  --bg-hover: #EAEEF5;
  --bg-active: #E1E6F0;

  /* Typography Colors */
  --text-primary: #1C1E23;
  --text-secondary: #5F6676;
  --text-tertiary: #8E95A5;
  --text-quaternary: #BAC0CE;

  /* YUVA Brand Accents (Aligned with Main Website Design System) */
  --saffron-primary: #FF9933;
  --saffron-light: #FFB366;
  --saffron-dark: #E67300;
  --saffron-pale: #FFE5CC;
  --green-primary: #138808;
  --green-light: #22C55E;
  --green-dark: #0F6606;
  --green-pale: #D1FAE5;
  --navy-chakra: #000080;
  --navy-dark: #00005C;

  --yuva-orange: #FF9933;
  --yuva-orange-light: #FFE5CC;
  --yuva-orange-hover: #E67300;
  --yuva-blue: #000080;
  --yuva-blue-light: #EBF4FF;
  --yuva-blue-hover: #00005C;
  --yuva-green: #138808;
  --yuva-green-light: #D1FAE5;

  /* Semantic UI Colors */
  --success: #138808;
  --success-bg: #D1FAE5;
  --danger: #EF4444;
  --danger-bg: #FEF2F2;
  --warning: #FF9933;
  --warning-bg: #FFE5CC;

  /* Apple-Style Pastel Sticky-Note Tones */
  --color-default: #FFFFFF;
  --color-rose: #FFF1F3;
  --color-peach: #FFF5EC;
  --color-yellow: #FEF9E7;
  --color-mint: #EDFAF2;
  --color-sky: #F0F6FF;
  --color-lavender: #F6F1FF;
  --color-coral: #FFF0EB;

  /* Borders & Dividers */
  --border-subtle: rgba(0, 0, 0, 0.055);
  --border-card: rgba(0, 0, 0, 0.07);
  --border-focus: rgba(24, 90, 219, 0.45);
  --border-glass: rgba(255, 255, 255, 0.95);

  /* Shadows (Multi-layered subtle Apple depth) */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.035);
  --shadow-sm: 0 2px 6px -1px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 6px 18px -2px rgba(0, 0, 0, 0.05), 0 2px 6px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 14px 34px -4px rgba(0, 0, 0, 0.07), 0 4px 12px -2px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 24px 50px -10px rgba(0, 0, 0, 0.1), 0 8px 20px -4px rgba(0, 0, 0, 0.04);
  --shadow-lift: 0 18px 38px -6px rgba(0, 0, 0, 0.08), 0 6px 14px -3px rgba(0, 0, 0, 0.04);
  --shadow-orange-glow: 0 8px 24px -4px rgba(255, 107, 0, 0.35);

  /* Radii */
  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 9999px;

  /* Transitions */
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.25, 0.8, 0.25, 1);
  --trans-fast: 0.15s var(--ease-smooth);
  --trans-base: 0.24s var(--ease-spring);
  --trans-spring: 0.45s var(--ease-spring);

  /* Typography */
  --font-display: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "SF Pro Display", "Outfit", system-ui, sans-serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Plus Jakarta Sans", "SF Pro Text", "Inter", system-ui, sans-serif;
  --font-mono: "SF Mono", Menlo, Consolas, "JetBrains Mono", monospace;
}

/* Base reset & box-sizing */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Luxury Custom Minimal Scrollbars (Zero Arrow Buttons, Floating Pill) */
* {
  scrollbar-width: thin;
  scrollbar-color: rgba(148, 163, 184, 0.4) transparent;
}

::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.35);
  border-radius: 9999px;
  border: 1px solid transparent;
  background-clip: padding-box;
  transition: background-color 0.2s ease;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(100, 116, 139, 0.65);
}

::-webkit-scrollbar-thumb:active {
  background: rgba(255, 153, 51, 0.85); /* Saffron brand accent */
}

::-webkit-scrollbar-button {
  display: none !important;
  width: 0 !important;
  height: 0 !important;
}

::-webkit-scrollbar-corner {
  background: transparent;
}

@media (max-width: 767px) {
  ::-webkit-scrollbar {
    width: 3px;
    height: 3px;
  }
}

/* Category Filter Chips Global Rules - Clean wrap on desktop, zero ugly scrollbars */
.filter-chips-row {
  display: flex !important;
  align-items: center !important;
  gap: 6px !important;
  flex-wrap: wrap !important;
  overflow-x: visible !important;
  overflow-y: visible !important;
  scrollbar-width: none !important;
  -ms-overflow-style: none !important;
}

.filter-chips-row::-webkit-scrollbar {
  display: none !important;
  width: 0 !important;
  height: 0 !important;
}

/* Subtle Apple Glass Atmosphere */
.glass-surface {
  background: var(--bg-surface-translucent);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--border-glass);
}

/* ==========================================================================
   APP LAYOUT (Modern Desktop App: Fixed Non-Scrolling Shell)
   ========================================================================== */
.app-container {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  position: relative;
}

/* --------------------------------------------------------------------------
   SIDEBAR NAVIGATION & CONCENTRIC CORNER RADIUS ARCHITECTURE
   Formula: Inner Radius = Outer Radius - Padding
   ========================================================================== */
.sidebar {
  --sidebar-pad-x: 16px;
  --sidebar-pad-y: 18px;
  --sidebar-radius-outer: 32px;
  --sidebar-radius-inner: calc(var(--sidebar-radius-outer) - var(--sidebar-pad-x)); /* 32px - 16px = 16px */

  width: 260px;
  flex-shrink: 0;
  height: 100vh;
  max-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: var(--sidebar-pad-y) var(--sidebar-pad-x) !important;
  background: #FFFFFF;
  border-right: 1px solid #E2E8F0;
  border-top-right-radius: var(--sidebar-radius-outer) !important;
  border-bottom-right-radius: var(--sidebar-radius-outer) !important;
  overflow: hidden !important; /* Sidebar root NEVER scrolls */
  box-shadow: 4px 0 24px -4px rgba(0, 0, 0, 0.04);
}

/* Concentric nested radius for sidebar footer card */
.sidebar .sidebar-footer-card > div {
  border-radius: var(--sidebar-radius-inner) !important;
}

.sidebar .nav-item {
  border-radius: calc(var(--sidebar-radius-inner) - 2px) !important;
}

/* Zero Scrollbar Invariance for Sidebar */
.sidebar,
.sidebar *,
#tags-list-container,
.tags-list-container {
  scrollbar-width: none !important;
  -ms-overflow-style: none !important;
}

.sidebar::-webkit-scrollbar,
.sidebar *::-webkit-scrollbar,
#tags-list-container::-webkit-scrollbar,
.tags-list-container::-webkit-scrollbar {
  display: none !important;
  width: 0 !important;
  height: 0 !important;
}

/* Brand Capsule */
.brand-capsule {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 6px;
  margin-bottom: 10px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--text-primary);
  user-select: none;
  flex-shrink: 0;
}

.brand-logo-wrapper {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #FFFFFF;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 0, 0, 0.06);
  flex-shrink: 0;
  padding: 3px;
  overflow: hidden;
}

.brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

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

.brand-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.08rem;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 5px;
  line-height: 1.15;
}

.brand-title .badge-yuva {
  color: #FF6B00;
}

.brand-title .badge-notes {
  color: var(--text-primary);
}

.brand-subtitle {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-tertiary);
  letter-spacing: 0.02em;
}

/* Quick New Note Button in Sidebar */
.btn-new-note-sidebar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 9px 14px;
  background: linear-gradient(135deg, var(--yuva-orange) 0%, #FF5A00 100%);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 12px -2px rgba(255, 107, 0, 0.35);
  transition: transform var(--trans-fast), box-shadow var(--trans-fast);
  margin-bottom: 12px;
  flex-shrink: 0;
}

.btn-new-note-sidebar:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px -2px rgba(255, 107, 0, 0.45);
}

.btn-new-note-sidebar:active {
  transform: translateY(0);
}

.btn-new-note-sidebar kbd {
  background: rgba(255, 255, 255, 0.25);
  padding: 2px 5px;
  border-radius: 4px;
  font-size: 0.68rem;
  font-family: var(--font-mono);
}

/* Navigation Lists */
.nav-section-title {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: 700;
  color: var(--text-tertiary);
  padding: 0 8px 4px 8px;
  flex-shrink: 0;
}

.nav-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 10px;
  flex-shrink: 0;
}

.nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 10px;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--trans-fast);
  user-select: none;
  border: 1px solid transparent;
}

.nav-item-content {
  display: flex;
  align-items: center;
  gap: 9px;
}

.nav-item-content i {
  font-size: 1.05rem;
  color: var(--text-tertiary);
  transition: color var(--trans-fast);
}

.nav-item .nav-count {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 1.5px 6px;
  border-radius: var(--radius-pill);
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-tertiary);
  transition: all var(--trans-fast);
}

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

.nav-item:hover .nav-item-content i {
  color: var(--text-primary);
}

.nav-item.active {
  background: #FFFFFF;
  color: var(--yuva-blue);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  border-color: rgba(0, 0, 0, 0.05);
}

.nav-item.active .nav-item-content i {
  color: var(--yuva-blue);
}

.nav-item.active .nav-count {
  background: var(--yuva-blue-light);
  color: var(--yuva-blue);
}

/* Tags List with zero scrollbar */
.tags-list-container {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  gap: 2px;
  overscroll-behavior: contain;
  scrollbar-width: none !important; /* Hide scrollbar Firefox */
  -ms-overflow-style: none !important; /* Hide scrollbar IE/Edge */
}

.tags-list-container::-webkit-scrollbar {
  display: none !important; /* Hide scrollbar Chrome/Safari */
  width: 0 !important;
  height: 0 !important;
}

.tag-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 8px;
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--trans-fast);
}

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

.tag-item.active {
  background: #FFFFFF;
  color: var(--yuva-orange);
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.tag-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--yuva-orange);
  display: inline-block;
  margin-right: 6px;
  flex-shrink: 0;
}

/* Sidebar Footer */
.sidebar-footer {
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px solid #E2E8F0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.sidebar-btn-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--trans-fast);
}

.sidebar-btn-icon:hover {
  background: #FFFFFF;
  color: var(--text-primary);
  box-shadow: var(--shadow-xs);
  border-color: var(--border-subtle);
}

/* --------------------------------------------------------------------------
   MAIN CONTENT AREA (Only this container scrolls)
   -------------------------------------------------------------------------- */
.main-wrapper {
  flex: 1;
  height: 100vh;
  max-height: 100vh;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow-y: auto; /* ONLY the main note content canvas scrolls */
  overflow-x: hidden;
  background: var(--bg-app);
}

/* --------------------------------------------------------------------------
   TOP NAVIGATION BAR
   -------------------------------------------------------------------------- */
.topbar {
  height: 74px;
  position: sticky;
  top: 0;
  z-index: 25;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  border-bottom: 1px solid var(--border-subtle);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
  max-width: 580px;
}

.mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* Apple-Style Global Search Bar */
.search-container {
  position: relative;
  width: 100%;
}

.search-icon-wrapper {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
  pointer-events: none;
}

.search-icon-wrapper svg {
  width: 17px;
  height: 17px;
}

.search-input {
  width: 100%;
  height: 42px;
  padding: 0 42px 0 40px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  color: var(--text-primary);
  outline: none;
  box-shadow: var(--shadow-xs);
  transition: all var(--trans-fast);
}

.search-input:focus {
  background: #FFFFFF;
  border-color: var(--yuva-blue);
  box-shadow: 0 0 0 3px rgba(24, 90, 219, 0.12), var(--shadow-sm);
}

.search-input::placeholder {
  color: var(--text-tertiary);
}

.search-clear-btn {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  display: none;
  padding: 4px;
  border-radius: 50%;
}

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

.search-kbd-hint {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--bg-subtle);
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: 6px;
  pointer-events: none;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

/* Topbar Right Controls */
.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Segmented View Control */
.view-mode-toggle {
  display: flex;
  background: var(--bg-subtle);
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.view-btn {
  width: 34px;
  height: 32px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--trans-fast);
}

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

.view-btn.active {
  background: #FFFFFF;
  color: var(--text-primary);
  box-shadow: var(--shadow-xs);
}

.sort-select-wrapper {
  position: relative;
}

.sort-select {
  appearance: none;
  -webkit-appearance: none;
  height: 38px;
  padding: 0 32px 0 14px;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  outline: none;
  transition: all var(--trans-fast);
  box-shadow: var(--shadow-xs);
}

.sort-select:hover,
.sort-select:focus {
  border-color: var(--text-tertiary);
  color: var(--text-primary);
}

.sort-select-arrow {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--text-tertiary);
}

.topbar-icon-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--trans-fast);
  box-shadow: var(--shadow-xs);
  position: relative;
}

.topbar-icon-btn:hover {
  color: var(--text-primary);
  background: #FFFFFF;
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

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

.topbar-icon-btn svg {
  width: 17px;
  height: 17px;
}

/* --------------------------------------------------------------------------
   CONTENT CANVAS & NOTE GRIDS
   -------------------------------------------------------------------------- */
.content-canvas {
  padding: 32px;
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
}

#brain-graph-canvas {
  touch-action: none !important;
  user-select: none !important;
  -webkit-user-select: none !important;
}

/* Welcome / Hero Banner (Gentle Apple Light Gradient) */
.hero-greeting {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 28px;
}

.greeting-text-block h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2rem;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.15;
}

.greeting-text-block p {
  color: var(--text-secondary);
  font-size: 0.96rem;
  margin-top: 4px;
}

/* Live Quick Stat Pills */
.hero-stats-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.stat-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-xs);
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.stat-pill strong {
  color: var(--text-primary);
  font-weight: 700;
}

.stat-pill svg {
  width: 15px;
  height: 15px;
  color: var(--yuva-orange);
}

/* Section Dividers & Headers */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 28px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title svg {
  width: 17px;
  height: 17px;
  color: var(--yuva-orange);
}

.section-badge-count {
  font-size: 0.76rem;
  font-weight: 600;
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-tertiary);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

/* --------------------------------------------------------------------------
   STICKY NOTE CARDS & GRID
   -------------------------------------------------------------------------- */
.notes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 22px;
  margin-bottom: 36px;
}

/* ==========================================================================
   ELEGANT NOTION / APPLE STYLE LIST MODE
   ========================================================================== */
.notes-grid.list-view,
.notes-grid.list-layout {
  display: flex !important;
  flex-direction: column !important;
  grid-template-columns: none !important;
  gap: 10px !important;
}

.notes-grid.list-view .note-card,
.notes-grid.list-layout .note-card {
  display: flex !important;
  flex-direction: row !important;
  align-items: center !important;
  justify-content: space-between !important;
  min-height: 58px !important;
  max-height: 68px !important;
  padding: 10px 18px !important;
  border-radius: 14px !important;
  background: #FFFFFF !important;
  border: 1px solid #E2E8F0 !important;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02) !important;
  gap: 16px !important;
  overflow: hidden !important;
}

.notes-grid.list-view .note-card:hover,
.notes-grid.list-layout .note-card:hover {
  transform: translateY(-1px) !important;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05) !important;
  border-color: #CBD5E1 !important;
}

.notes-grid.list-view .note-card::before,
.notes-grid.list-layout .note-card::before {
  top: 0;
  left: 0;
  bottom: 0;
  width: 4.5px;
  height: 100%;
  border-radius: 14px 0 0 14px;
}

/* Left Group: Badge, Pin, Title */
.notes-grid.list-view .note-header,
.notes-grid.list-layout .note-header {
  display: flex !important;
  flex-direction: row !important;
  align-items: center !important;
  gap: 10px !important;
  margin-bottom: 0 !important;
  flex: 0 0 32% !important;
  min-width: 180px !important;
}

.notes-grid.list-view .note-header-top,
.notes-grid.list-layout .note-header-top {
  display: flex !important;
  align-items: center !important;
  gap: 8px !important;
  width: auto !important;
  margin-bottom: 0 !important;
  flex-shrink: 0 !important;
}

.notes-grid.list-view .note-title,
.notes-grid.list-layout .note-title {
  font-size: 0.92rem !important;
  font-weight: 700 !important;
  color: #0F172A !important;
  white-space: nowrap !important;
  overflow: hidden !important;
  text-overflow: ellipsis !important;
  margin: 0 !important;
  flex: 1 !important;
}

/* Middle: Content Preview Text */
.notes-grid.list-view .note-content-preview,
.notes-grid.list-layout .note-content-preview {
  flex: 1 1 auto !important;
  max-height: 20px !important;
  font-size: 0.82rem !important;
  color: #64748B !important;
  white-space: nowrap !important;
  overflow: hidden !important;
  text-overflow: ellipsis !important;
  margin: 0 !important;
  padding: 0 !important;
  mask-image: none !important;
  -webkit-mask-image: none !important;
}

.notes-grid.list-view .note-content-preview *,
.notes-grid.list-layout .note-content-preview * {
  display: inline !important;
  margin: 0 !important;
  padding: 0 !important;
  font-size: 0.82rem !important;
}

/* Right Items: Tags & DNA (compact) */
.notes-grid.list-view .note-dna-strip,
.notes-grid.list-layout .note-dna-strip {
  display: none !important;
}

.notes-grid.list-view .note-tags-row,
.notes-grid.list-layout .note-tags-row {
  display: flex !important;
  flex-wrap: nowrap !important;
  gap: 4px !important;
  margin: 0 !important;
  flex-shrink: 0 !important;
}

/* Far Right Footer: Timestamp & Actions */
.notes-grid.list-view .note-footer,
.notes-grid.list-layout .note-footer {
  display: flex !important;
  align-items: center !important;
  gap: 12px !important;
  border-top: none !important;
  padding-top: 0 !important;
  margin-top: 0 !important;
  flex-shrink: 0 !important;
}

.notes-grid.list-view .note-time,
.notes-grid.list-layout .note-time {
  font-size: 0.75rem !important;
  color: #94A3B8 !important;
  white-space: nowrap !important;
}

/* Compact Grid Variant */
.notes-grid.compact-view {
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

.notes-grid.compact-view .note-card {
  padding: 16px;
  min-height: 160px;
}

.notes-grid.compact-view .note-title {
  font-size: 1rem;
}

/* The Individual Tactile Note Card — Modern Premium SaaS Aesthetic */
.note-card {
  position: relative;
  background: #FFFFFF;
  border-radius: 16px;
  padding: 20px 22px 18px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 220px;
  border: 1px solid #E5E7EB;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.04), 0 1px 2px -1px rgba(0, 0, 0, 0.02);
  cursor: pointer;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.15s ease;
  user-select: none;
  overflow: hidden;
}

/* Subtle Top Color Accent Line */
.note-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3.5px;
  background: #E5E7EB;
  border-radius: 16px 16px 0 0;
  transition: background 0.2s ease;
}

.note-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px -4px rgba(16, 24, 40, 0.08), 0 4px 8px -2px rgba(16, 24, 40, 0.03);
  border-color: #D1D5DB;
}

.note-card:active {
  transform: scale(0.99);
}

/* Refined Pastel Color Palette with Top Accents */
.note-card.color-default {
  background: #FFFFFF;
  border-color: #E5E7EB;
}
.note-card.color-default::before {
  background: #E5E7EB;
}

.note-card.color-rose {
  background: #FFF8F9;
  border-color: #FECDD3;
}
.note-card.color-rose::before {
  background: #F43F5E;
}

.note-card.color-peach {
  background: #FFFAF5;
  border-color: #FED7AA;
}
.note-card.color-peach::before {
  background: #FF6B00;
}

.note-card.color-yellow {
  background: #FEFDF5;
  border-color: #FDE68A;
}
.note-card.color-yellow::before {
  background: #F59E0B;
}

.note-card.color-mint {
  background: #F6FCF8;
  border-color: #A7F3D0;
}
.note-card.color-mint::before {
  background: #10B981;
}

.note-card.color-sky {
  background: #F6FAFF;
  border-color: #BAE6FD;
}
.note-card.color-sky::before {
  background: #0284C7;
}

.note-card.color-lavender {
  background: #FAF7FF;
  border-color: #DDD6FE;
}
.note-card.color-lavender::before {
  background: #8B5CF6;
}

.note-card.color-coral {
  background: #FFF8F6;
  border-color: #FFCCD5;
}
.note-card.color-coral::before {
  background: #FB7185;
}

/* Note Card Header */
.note-header {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  width: 100%;
  margin-bottom: 10px;
}

.note-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  margin-bottom: 6px;
}

.note-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.015em;
  color: #0F172A;
  line-height: 1.38;
  width: 100%;
  display: block;
  word-break: break-word;
}

.note-pin-btn {
  background: transparent;
  border: none;
  color: #9CA3AF;
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--trans-fast);
  flex-shrink: 0;
}

.note-pin-btn:hover {
  color: var(--yuva-orange);
  background: rgba(255, 107, 0, 0.08);
}

.note-pin-btn.pinned {
  color: var(--yuva-orange);
}

.note-pin-btn svg {
  width: 17px;
  height: 17px;
  stroke-width: 2.2;
}

/* Note Content Preview (Robust, Non-collapsing layout) */
.note-content-preview {
  color: #4B5563;
  font-size: 0.88rem;
  line-height: 1.55;
  flex-grow: 1;
  margin-bottom: 14px;
  max-height: 135px;
  overflow: hidden;
  position: relative;
  mask-image: linear-gradient(180deg, #000 70%, transparent 100%);
  -webkit-mask-image: linear-gradient(180deg, #000 70%, transparent 100%);
}

.note-preview-empty {
  color: #9CA3AF;
  font-style: italic;
  font-size: 0.84rem;
}

/* Checklist Items on Card Preview */
.note-checklist-preview {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 8px;
}

.note-checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.86rem;
  line-height: 1.4;
  color: #374151;
  cursor: pointer;
}

.note-checklist-item input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin-top: 2px;
  border-radius: 4px;
  border: 1.5px solid #CBD5E1;
  accent-color: var(--yuva-orange);
  cursor: pointer;
  flex-shrink: 0;
}

.note-checklist-item.completed {
  color: #9CA3AF;
  text-decoration: line-through;
}

.note-checklist-more {
  font-size: 0.74rem;
  color: #9CA3AF;
  font-weight: 500;
  margin-left: 24px;
}

/* Text Snippet Paragraphs */
.note-text-snippet p {
  margin-bottom: 6px;
  color: #4B5563;
  font-size: 0.87rem;
  line-height: 1.5;
}

/* Tag Pills on Card */
.note-tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.note-tag-pill {
  font-size: 0.72rem;
  font-weight: 500;
  padding: 2.5px 8px;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.04);
  color: #4B5563;
  border: 1px solid rgba(0, 0, 0, 0.06);
  letter-spacing: 0.01em;
}

/* Note Card Footer */
.note-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 10px;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  font-size: 0.76rem;
  color: #9CA3AF;
  font-weight: 500;
}

.note-time {
  color: #9CA3AF;
}

/* Quick Action Menu Bar on Card */
.note-actions {
  display: flex;
  align-items: center;
  gap: 3px;
  opacity: 0.35;
  transition: opacity 0.15s ease;
}

.note-card:hover .note-actions {
  opacity: 1;
}

.note-action-btn {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: transparent;
  border: none;
  color: #6B7280;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
}

.note-action-btn:hover {
  background: rgba(0, 0, 0, 0.07);
  color: #111827;
  transform: scale(1.06);
}

.note-action-btn.delete:hover {
  color: #EF4444;
  background: #FEF2F2;
}

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

/* Drag Handle */
.drag-handle {
  cursor: grab;
}

.drag-handle:active {
  cursor: grabbing;
}

.sortable-ghost {
  opacity: 0.4;
  transform: scale(0.96);
}

.sortable-chosen {
  box-shadow: var(--shadow-xl);
}

/* Empty State Canvas */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 64px 20px;
  text-align: center;
}

.empty-illustration {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  margin-bottom: 20px;
  border: 1px solid var(--border-card);
  color: var(--yuva-orange);
}

.empty-illustration svg {
  width: 44px;
  height: 44px;
}

.empty-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.empty-desc {
  font-size: 0.94rem;
  color: var(--text-secondary);
  max-width: 380px;
  line-height: 1.5;
  margin-bottom: 24px;
}

.btn-empty-action {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  background: var(--yuva-blue);
  color: #FFFFFF;
  font-weight: 600;
  font-size: 0.92rem;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(24, 90, 219, 0.3);
  transition: all var(--trans-fast);
}

.btn-empty-action:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(24, 90, 219, 0.4);
}

/* --------------------------------------------------------------------------
   FLOATING ACTION BUTTON (Mobile & Desktop Quick Add)
   -------------------------------------------------------------------------- */
.fab-new-note {
  position: fixed;
  right: 32px;
  bottom: 32px;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--yuva-orange) 0%, #FF5100 100%);
  color: #FFFFFF;
  border: none;
  box-shadow: 0 10px 30px -3px rgba(255, 107, 0, 0.5), 0 4px 10px rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 40;
  transition: transform var(--trans-spring), box-shadow var(--trans-fast);
}

.fab-new-note:hover {
  transform: scale(1.08) translateY(-2px);
  box-shadow: 0 16px 36px -4px rgba(255, 107, 0, 0.65);
}

.fab-new-note:active {
  transform: scale(0.95);
}

.fab-new-note svg {
  width: 26px;
  height: 26px;
  stroke-width: 2.5;
}

/* --------------------------------------------------------------------------
   IOS-STYLE SHEET MODAL (Note Editor)
   -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(24, 28, 36, 0.28);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--trans-base), visibility var(--trans-base);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-sheet {
  background: #FFFFFF;
  width: 100%;
  max-width: 860px;
  max-height: 90vh;
  border-radius: var(--radius-xl);
  box-shadow: 0 24px 60px -12px rgba(0, 0, 0, 0.22), 0 8px 24px -4px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--border-glass);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.95) translateY(24px);
  transition: transform var(--trans-spring), background var(--trans-base);
}

.modal-overlay.active .modal-sheet {
  transform: scale(1) translateY(0);
}

/* Modal Header Bar */
.modal-header {
  position: relative;
  z-index: 60;
  padding: 18px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
}

.modal-header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Autosave Capsule Indicator */
.autosave-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-tertiary);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: var(--bg-subtle);
  transition: all var(--trans-fast);
}

.autosave-status.saving {
  color: var(--yuva-orange);
  background: var(--yuva-orange-light);
}

.autosave-status.saved {
  color: var(--success);
  background: var(--success-bg);
}

.autosave-status svg {
  width: 13px;
  height: 13px;
}

.modal-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-btn {
  height: 36px;
  padding: 0 14px;
  border-radius: var(--radius-pill);
  font-size: 0.86rem;
  font-weight: 600;
  border: 1px solid var(--border-subtle);
  background: #FFFFFF;
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all var(--trans-fast);
}

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

.modal-btn.primary {
  background: var(--yuva-orange);
  color: #FFFFFF;
  border-color: var(--yuva-orange);
}

.modal-btn.primary:hover {
  background: var(--yuva-orange-hover);
}

.modal-btn.icon-only {
  width: 36px;
  padding: 0;
  justify-content: center;
}

/* Modal Body */
.modal-body {
  padding: 24px 28px;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Title Input */
.editor-title-input {
  width: 100%;
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  border: none;
  background: transparent;
  outline: none;
  padding: 4px 0 12px 0;
}

.editor-title-input::placeholder {
  color: var(--text-quaternary);
}

/* Metadata Controls Bar inside Sheet */
.editor-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid #E2E8F0;
  margin-bottom: 14px;
  flex-shrink: 0;
}

/* Note Pastel Color Palette Picker */
.color-picker-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  min-height: 38px;
  padding: 6px 4px;
}

.color-swatch-btn,
.color-dot-btn {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2.5px solid #FFFFFF;
  box-shadow: 0 0 0 1px #CBD5E1, 0 1px 3px rgba(0, 0, 0, 0.08);
  cursor: pointer;
  transition: all 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
  outline: none;
  padding: 0;
  flex-shrink: 0;
  position: relative;
}

.color-swatch-btn:hover,
.color-dot-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 0 0 1.5px #94A3B8, 0 2px 6px rgba(0, 0, 0, 0.14);
}

.color-swatch-btn.selected,
.color-swatch-btn.active,
.color-dot-btn.active {
  transform: scale(1.12);
  box-shadow: 0 0 0 2px #FFFFFF, 0 0 0 4px #FF6B00, 0 3px 8px rgba(255, 107, 0, 0.35) !important;
}

/* Tag Input Pill System */
.tags-editor-wrapper {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  flex-shrink: 0;
}

.editor-tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: rgba(0, 0, 0, 0.06);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.editor-tag-chip button {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-tertiary);
  display: flex;
  padding: 0;
}

.editor-tag-chip button:hover {
  color: var(--danger);
}

.tag-text-input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.82rem;
  color: var(--text-primary);
  min-width: 90px;
}

/* Markdown Toolbar */
.markdown-toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  background: #F1F5F9;
  border: 1px solid #E2E8F0;
  border-radius: 12px;
  margin-bottom: 14px;
  flex-shrink: 0;
  min-height: 42px;
  box-sizing: border-box;
  overflow-x: auto;
}

.md-tool-btn {
  width: 32px;
  height: 30px;
  border-radius: 6px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--trans-fast);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  flex-shrink: 0;
}

.md-tool-btn:hover {
  background: #FFFFFF;
  color: var(--text-primary);
  box-shadow: var(--shadow-xs);
}

.md-tool-divider {
  width: 1px;
  height: 18px;
  background: rgba(0, 0, 0, 0.1);
  margin: 0 4px;
  flex-shrink: 0;
}

/* Editor View Selector (Edit / Split / Preview) */
.editor-view-tabs {
  margin-left: auto;
  display: flex;
  background: #FFFFFF;
  padding: 2px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-subtle);
}

.editor-tab-btn {
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all var(--trans-fast);
}

.editor-tab-btn.active {
  background: var(--bg-app);
  color: var(--text-primary);
  box-shadow: var(--shadow-xs);
}

/* Editor Content Area */
.editor-content-container {
  display: flex;
  gap: 20px;
  flex: 1;
  min-height: 280px;
}

.editor-textarea {
  flex: 1;
  width: 100%;
  border: none;
  background: transparent;
  outline: none;
  resize: none;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text-primary);
}

.editor-textarea::placeholder {
  color: var(--text-quaternary);
}

/* Live Markdown Rendered Pane */
.editor-preview-pane {
  flex: 1;
  border-left: 1px solid rgba(0, 0, 0, 0.06);
  padding-left: 20px;
  overflow-y: auto;
  font-size: 0.98rem;
  line-height: 1.65;
  color: var(--text-primary);
}

.editor-preview-pane.hidden {
  display: none;
}

.editor-content-container.preview-only .editor-textarea {
  display: none;
}

.editor-content-container.preview-only .editor-preview-pane {
  border-left: none;
  padding-left: 0;
}

/* Markdown Rendering Elements */
.editor-preview-pane h1,
.editor-preview-pane h2,
.editor-preview-pane h3,
.editor-preview-pane h4 {
  font-family: var(--font-display);
  font-weight: 700;
  margin: 18px 0 8px 0;
  line-height: 1.3;
}

.editor-preview-pane h1 {
  font-size: 1.5rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  padding-bottom: 6px;
}

.editor-preview-pane h2 {
  font-size: 1.3rem;
}

.editor-preview-pane h3 {
  font-size: 1.15rem;
}

.editor-preview-pane p {
  margin-bottom: 12px;
}

.editor-preview-pane ul,
.editor-preview-pane ol {
  padding-left: 24px;
  margin-bottom: 12px;
}

.editor-preview-pane li {
  margin-bottom: 4px;
}

.editor-preview-pane blockquote {
  border-left: 3.5px solid var(--yuva-orange);
  padding-left: 14px;
  color: var(--text-secondary);
  font-style: italic;
  margin: 12px 0;
  background: rgba(255, 107, 0, 0.03);
  padding-top: 4px;
  padding-bottom: 4px;
  border-radius: 0 8px 8px 0;
}

.editor-preview-pane pre {
  background: #F4F6F9;
  border: 1px solid rgba(0, 0, 0, 0.07);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  margin: 12px 0;
}

.editor-preview-pane code {
  font-family: var(--font-mono);
  background: rgba(0, 0, 0, 0.05);
  padding: 2px 6px;
  border-radius: 5px;
  font-size: 0.88em;
}

.editor-preview-pane table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 0.9rem;
}

.editor-preview-pane th,
.editor-preview-pane td {
  border: 1px solid rgba(0, 0, 0, 0.08);
  padding: 8px 12px;
  text-align: left;
}

.editor-preview-pane th {
  background: rgba(0, 0, 0, 0.03);
  font-weight: 600;
}

/* Modal Footer */
.modal-footer {
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  background: rgba(255, 255, 255, 0.85);
  font-size: 0.78rem;
  color: var(--text-tertiary);
}

.editor-stats {
  display: flex;
  gap: 16px;
}

/* --------------------------------------------------------------------------
   SECONDARY MODALS (Shortcuts, Stats, Backup & Settings)
   -------------------------------------------------------------------------- */
.sheet-compact {
  max-width: 520px;
}

.settings-section {
  margin-bottom: 22px;
}

.settings-section-title {
  font-family: var(--font-display);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  font-weight: 700;
  margin-bottom: 12px;
}

.settings-card {
  background: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.settings-row-info h4 {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
}

.settings-row-info p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Apple-Style Toggle Switch */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 26px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: #D1D5DB;
  transition: .3s var(--ease-spring);
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .3s var(--ease-spring);
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

input:checked+.slider {
  background-color: var(--yuva-orange);
}

input:checked+.slider:before {
  transform: translateX(18px);
}

/* Keyboard Shortcuts Modal Table */
.shortcuts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.shortcut-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg-canvas);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.shortcut-item span {
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.shortcut-item kbd {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  background: #FFFFFF;
  border: 1px solid rgba(0, 0, 0, 0.12);
  padding: 3px 7px;
  border-radius: 6px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  color: var(--text-primary);
}

/* Statistics Visual Meter */
.stats-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}

.stat-box {
  background: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  flex-direction: column;
}

.stat-box-val {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.1;
}

.stat-box-lbl {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-tertiary);
  margin-top: 4px;
}

/* Storage Bar */
.storage-bar-track {
  width: 100%;
  height: 10px;
  background: var(--bg-subtle);
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin: 10px 0 6px 0;
}

.storage-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--yuva-blue) 0%, var(--yuva-orange) 100%);
  border-radius: var(--radius-pill);
  transition: width var(--trans-spring);
}

/* --------------------------------------------------------------------------
   APPLE-STYLE CAPSULE TOAST NOTIFICATIONS
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.toast-capsule {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-pill);
  box-shadow: 0 10px 30px -4px rgba(0, 0, 0, 0.12), 0 2px 6px rgba(0, 0, 0, 0.04);
  color: var(--text-primary);
  font-size: 0.88rem;
  font-weight: 600;
  animation: toastPopIn 0.35s var(--ease-spring);
  pointer-events: auto;
}

.toast-capsule svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.toast-capsule.success svg {
  color: var(--success);
}

.toast-capsule.info svg {
  color: var(--yuva-blue);
}

.toast-capsule.warning svg {
  color: var(--warning);
}

.toast-capsule.danger svg {
  color: var(--danger);
}

@keyframes toastPopIn {
  0% {
    transform: translateY(-20px) scale(0.92);
    opacity: 0;
  }

  100% {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

/* --------------------------------------------------------------------------
   MOBILE RESPONSIVENESS & BOTTOM TAB BAR
   -------------------------------------------------------------------------- */
.mobile-bottom-bar {
  display: none;
}
/* --------------------------------------------------------------------------
   SENIOR UI/UX & KNOWLEDGE OPERATING SYSTEM STYLES
   -------------------------------------------------------------------------- */

/* Idea Evolution Card Badges & Types */
.note-type-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.type-note { background: #F1F5F9; color: #475569; }
.type-task { background: #ECFDF5; color: #059669; }
.type-flashcard { background: #EEF2FF; color: #4F46E5; }
.type-question { background: #FFFBEB; color: #D97706; }
.type-idea { background: #FEF3C7; color: #B45309; }
.type-checklist { background: #F0FDF4; color: #16A34A; }
.type-revision { background: #FAF5FF; color: #9333EA; }

/* 3D Interactive Flashcard Flip Animation */
.flashcard-wrapper {
  perspective: 1000px;
  min-height: 135px;
  height: 135px;
  cursor: pointer;
  margin: 4px 0 6px 0;
  user-select: none;
}

.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  transform-style: preserve-3d;
}

.flashcard-wrapper.flipped .flashcard-inner {
  transform: rotateY(180deg);
}

.flashcard-front,
.flashcard-back {
  position: absolute;
  inset: 0;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: stretch;
  border-radius: 12px;
  padding: 11px 13px;
  box-sizing: border-box;
}

.flashcard-front {
  background: #F8FAFC;
  border: 1.5px dashed #CBD5E1;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}

.flashcard-front:hover {
  border-color: #94A3B8;
  background: #F1F5F9;
}

.flashcard-back {
  background: #EEF2FF;
  border: 1.5px solid #C7D2FE;
  transform: rotateY(180deg);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.08);
}

.flashcard-text {
  overflow-y: auto;
  font-size: 0.775rem;
  line-height: 1.45;
}

/* Question Callout Box */
.question-box-preview {
  border-radius: 12px;
  background: #FFFBEB;
  border: 1px solid #FDE68A;
  padding: 12px 14px;
}

/* Note DNA Capsule Strip */
.note-dna-strip {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px dashed rgba(0, 0, 0, 0.06);
}

.dna-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2.5px 8px;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  line-height: 1.3;
}

.dna-chip:hover {
  transform: translateY(-1px);
}

.dna-chip-action {
  background: #ECFDF5;
  color: #047857;
  border-color: #A7F3D0;
}

.dna-chip-date {
  background: #FEF3C7;
  color: #B45309;
  border-color: #FDE68A;
}

.dna-chip-subject {
  background: #EEF2FF;
  color: #4338CA;
  border-color: #C7D2FE;
}

.dna-chip-concept {
  background: #FAF5FF;
  color: #7E22CE;
  border-color: #E9D5FF;
}

.dna-chip-formula {
  background: #F0FDF4;
  color: #15803D;
  border-color: #BBF7D0;
}

.dna-chip-ref {
  background: #F1F5F9;
  color: #475569;
  border-color: #E2E8F0;
}

/* Brain Graph Knowledge Network */
.graph-view-canvas {
  background-color: #F8FAFC;
  background-image: radial-gradient(#E2E8F0 1.2px, transparent 1.2px);
  background-size: 28px 28px;
}

/* View Transition Smooth Animation */
.view-transition-enter {
  animation: viewFadeIn 0.28s cubic-bezier(0.16, 1, 0.3, 1) forwards !important;
}

@keyframes viewFadeIn {
  0% {
    opacity: 0;
    transform: translateY(6px) scale(0.995);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Study Path Roadmap */
.study-path-timeline::before {
  content: '';
  position: absolute;
  top: 16px;
  bottom: 16px;
  left: 23px;
  width: 3px;
  background: linear-gradient(to bottom, #10B981, #059669, #3B82F6, #FF6B00);
  border-radius: 999px;
}

.study-path-step {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 20px;
  animation: studyStepCascade 0.38s cubic-bezier(0.16, 1, 0.3, 1) backwards;
  animation-delay: calc(var(--step-index, 0) * 65ms);
}

@keyframes studyStepCascade {
  0% {
    opacity: 0;
    transform: translateY(16px) scale(0.97);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.step-marker {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: #FFFFFF;
  border: 2px solid #10B981;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  color: #059669;
  flex-shrink: 0;
  z-index: 2;
  transition: transform 0.2s ease;
}

.study-path-step:hover .step-marker {
  transform: scale(1.08);
  background: #ECFDF5;
}

.step-card {
  flex: 1;
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 18px;
  padding: 18px 22px;
  box-shadow: var(--shadow-xs);
  transition: all 0.2s ease;
}

.step-card:hover {
  box-shadow: var(--shadow-md);
  border-color: #CBD5E1;
  transform: translateY(-2px);
}

/* Spatial 2D Canvas Surface */
.spatial-canvas-board.bg-dots {
  background-color: #F8FAFC;
  background-image: radial-gradient(#CBD5E1 1.2px, transparent 1.2px);
  background-size: 24px 24px;
}

.spatial-card {
  position: absolute;
  width: 260px;
  min-height: 180px;
  background: #FFFFFF;
  border-radius: 16px;
  padding: 16px;
  border: 1px solid #E2E8F0;
  box-shadow: 0 8px 20px -4px rgba(0, 0, 0, 0.08);
  cursor: grab;
  user-select: none;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.spatial-card:hover {
  box-shadow: 0 14px 28px -4px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px) rotate(-0.5deg);
  z-index: 10;
}

.spatial-card:active,
.spatial-card.is-dragging {
  cursor: grabbing !important;
  transform: scale(1.03) translateY(-4px) !important;
  box-shadow: 0 16px 32px -4px rgba(0, 0, 0, 0.16) !important;
  z-index: 100 !important;
}

/* Spatial Sticky Color Variations */
.spatial-card.color-yellow { background: #FEFCE8; border-color: #FEF08A; }
.spatial-card.color-blue { background: #EFF6FF; border-color: #BFDBFE; }
.spatial-card.color-green { background: #F0FDF4; border-color: #BBF7D0; }
.spatial-card.color-purple { background: #FAF5FF; border-color: #E9D5FF; }
.spatial-card.color-rose { background: #FFF1F2; border-color: #FECDD3; }
.spatial-card.color-amber { background: #FFFBEB; border-color: #FDE68A; }
.spatial-card.color-teal { background: #F0FDFA; border-color: #99F6E4; }
.spatial-card.color-orange { background: #FFF7ED; border-color: #FFEDD5; }

/* Related Notes Carousel */
.related-mini-card {
  flex-shrink: 0;
  width: 200px;
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 12px;
  padding: 10px 12px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.related-mini-card:hover {
  border-color: #FF6B00;
  box-shadow: var(--shadow-xs);
  transform: translateY(-2px);
}

/* 🪄 Focus Mode Typography Styles */
.focus-font-serif {
  font-family: 'Newsreader', Georgia, serif !important;
}

.focus-font-mono {
  font-family: 'JetBrains Mono', monospace !important;
}

.focus-font-sans {
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif !important;
}

/* ==========================================================================
   ULTRA-RESPONSIVE ARCHITECTURE & MULTI-DEVICE DESIGN SYSTEM
   ========================================================================== */

/* Touch-friendly base hit targets & safety */
@media (hover: none) and (pointer: coarse) {
  .note-card .note-actions {
    opacity: 0.95 !important;
    transform: none !important;
    visibility: visible !important;
  }
  
  .note-actions button,
  .btn,
  .nav-item,
  .tag-sidebar-row {
    min-height: 38px;
  }
}

/* Safe word breaking for small screens & foreign content */
.note-title,
.section-title,
.hero-greeting-card h1,
.daily-hero-card h2,
.modal-header h3 {
  overflow-wrap: break-word;
  word-break: break-word;
  hyphens: auto;
}

pre, code, .katex-display {
  max-width: 100%;
  overflow-x: auto;
}

/* --------------------------------------------------------------------------
   BREAKPOINT 1: LAPTOPS & INTERMEDIATE DESKTOPS (1024px - 1279px)
   -------------------------------------------------------------------------- */
@media (max-width: 1279px) {
  .dashboard-flex-container {
    flex-direction: column !important;
    gap: 24px !important;
    padding: 20px 24px 60px 24px !important;
  }

  .utility-panel {
    width: 100% !important;
    display: grid !important;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)) !important;
    gap: 20px !important;
  }

  .notes-grid {
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)) !important;
    gap: 18px !important;
  }
}

/* --------------------------------------------------------------------------
   BREAKPOINT 2: TABLETS & COMPACT LAPTOPS (768px - 1023px)
   -------------------------------------------------------------------------- */
@media (max-width: 1023px) {
  .sidebar {
    --sidebar-pad-x: 16px;
    --sidebar-pad-y: 20px;
    --sidebar-radius-outer: 36px;
    --sidebar-radius-inner: calc(var(--sidebar-radius-outer) - var(--sidebar-pad-x)); /* 36px - 16px = 20px */

    position: fixed !important;
    top: 0 !important;
    bottom: 0 !important;
    left: 0 !important;
    z-index: 100 !important;
    transform: translate3d(-105%, 0, 0) !important;
    pointer-events: none !important;
    transition: transform 0.48s cubic-bezier(0.25, 1, 0.5, 1), 
                box-shadow 0.48s ease !important;
    width: 294px !important;
    max-width: 85vw !important;
    padding: var(--sidebar-pad-y) var(--sidebar-pad-x) !important;
    border-top-right-radius: var(--sidebar-radius-outer) !important;
    border-bottom-right-radius: var(--sidebar-radius-outer) !important;
    border-right: 1px solid rgba(226, 232, 240, 0.85) !important;
    box-shadow: none !important;
    will-change: transform;
    -webkit-overflow-scrolling: touch !important;
  }

  .sidebar.open {
    transform: translate3d(0, 0, 0) !important;
    pointer-events: auto !important;
    box-shadow: 16px 0 50px -10px rgba(15, 23, 42, 0.22), 0 0 0 1px rgba(0, 0, 0, 0.04) !important;
    transition: transform 0.52s cubic-bezier(0.22, 1, 0.36, 1), 
                box-shadow 0.52s ease !important;
  }

  /* Concentric inner nested radius on mobile/tablet */
  .sidebar .sidebar-footer-card > div {
    border-radius: var(--sidebar-radius-inner) !important;
  }

  .sidebar .nav-item {
    border-radius: calc(var(--sidebar-radius-inner) - 4px) !important;
  }

  .sidebar-backdrop {
    position: fixed !important;
    inset: 0 !important;
    background: rgba(15, 23, 42, 0.45) !important;
    backdrop-filter: blur(6px) !important;
    -webkit-backdrop-filter: blur(6px) !important;
    z-index: 90 !important;
    opacity: 0 !important;
    pointer-events: none !important;
    transition: opacity 0.48s cubic-bezier(0.25, 1, 0.5, 1) !important;
    will-change: opacity;
  }

  .sidebar-backdrop.active {
    opacity: 1 !important;
    pointer-events: auto !important;
    transition: opacity 0.52s cubic-bezier(0.22, 1, 0.36, 1) !important;
  }

  .topbar {
    padding: 0 20px !important;
    height: 68px !important;
  }

  .content-canvas {
    padding: 16px 20px 80px 20px !important;
  }

  .notes-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)) !important;
    gap: 16px !important;
  }

  .fab-new-note {
    bottom: calc(76px + env(safe-area-inset-bottom, 0px)) !important;
    right: 24px !important;
  }

  .main-wrapper {
    padding-bottom: calc(76px + env(safe-area-inset-bottom, 0px)) !important;
  }
}

/* --------------------------------------------------------------------------
   BREAKPOINT 3: MOBILE DEVICES (480px - 767px)
   -------------------------------------------------------------------------- */
@media (max-width: 767px) {
  .topbar {
    padding: 0 10px !important;
    height: 60px !important;
    gap: 6px !important;
  }

  .content-canvas {
    padding: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
  }

  .dashboard-flex-container {
    padding: 10px 8px 80px 8px !important;
    gap: 12px !important;
    width: 100% !important;
  }

  .search-container input {
    height: 38px !important;
    font-size: 0.85rem !important;
    padding-left: 36px !important;
    padding-right: 32px !important;
    border-radius: 14px !important;
  }

  .hero-greeting-card {
    padding: 14px 12px !important;
    border-radius: 20px !important;
    flex-direction: column !important;
    gap: 12px !important;
  }

  .hero-greeting-card h1 {
    font-size: clamp(1.2rem, 5vw, 1.5rem) !important;
  }

  .scenic-quote-card {
    width: 100% !important;
  }

  .stats-cards-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 8px !important;
  }

  .stat-card {
    padding: 10px 8px !important;
    border-radius: 16px !important;
    gap: 8px !important;
  }

  .stat-card > div:first-child {
    width: 36px !important;
    height: 36px !important;
    font-size: 1rem !important;
    border-radius: 10px !important;
  }

  .stat-card .text-2xl {
    font-size: 1.25rem !important;
  }

  .notes-grid {
    grid-template-columns: 1fr !important;
    gap: 10px !important;
  }

  .notes-grid .note-card {
    min-height: auto !important;
    padding: 14px !important;
  }

  /* Filter chips horizontal scroll */
  .filter-chips-row {
    width: 100% !important;
    overflow-x: auto !important;
    white-space: nowrap !important;
    flex-wrap: nowrap !important;
    padding-bottom: 4px !important;
    -webkit-overflow-scrolling: touch !important;
    scrollbar-width: none !important;
  }

  .filter-chips-row::-webkit-scrollbar {
    display: none !important;
  }

  .filter-controls-row {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 10px !important;
  }

  .filter-controls-row > div:last-child {
    width: 100% !important;
    display: flex !important;
    justify-content: flex-end !important;
  }

  /* iOS-Style Full-Screen Mobile Note Editor */
  #editor-modal {
    padding: 0 !important;
    align-items: flex-end !important;
  }

  #editor-modal.active .modal-sheet {
    width: 100% !important;
    max-width: 100% !important;
    height: 100% !important;
    height: 100dvh !important;
    max-height: 100dvh !important;
    border-radius: 0 !important;
    margin: 0 !important;
    border: none !important;
  }

  #editor-modal .modal-header {
    padding: 10px 14px !important;
    background: #FFFFFF !important;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06) !important;
    position: sticky !important;
    top: 0 !important;
    z-index: 30 !important;
  }

  #editor-modal .markdown-toolbar {
    position: sticky !important;
    top: 48px !important;
    z-index: 25 !important;
    background: rgba(248, 250, 252, 0.96) !important;
    backdrop-filter: blur(8px) !important;
    -webkit-backdrop-filter: blur(8px) !important;
    border-radius: 12px !important;
    padding: 4px 8px !important;
    margin: 0 0 10px 0 !important;
  }

  #editor-modal .modal-body {
    padding: 12px 14px max(80px, env(safe-area-inset-bottom, 24px)) 14px !important;
  }

  #editor-modal .editor-split-container {
    flex-direction: column !important;
  }

  #editor-modal .editor-preview-pane {
    display: none;
  }

  #editor-modal .editor-split-container.is-preview-active #editor-content {
    display: none !important;
  }

  #editor-modal .editor-split-container.is-preview-active .editor-preview-pane {
    display: block !important;
  }

  /* Mobile Bottom-Sheet for Popups & Dialogs */
  .modal-overlay {
    align-items: flex-end !important;
    padding: 0 !important;
  }

  .modal-overlay.active .modal-sheet:not(#editor-modal .modal-sheet) {
    width: 100% !important;
    max-width: 100% !important;
    border-radius: 28px 28px 0 0 !important;
    margin: 0 !important;
    max-height: 88dvh !important;
    padding: 20px 18px max(24px, env(safe-area-inset-bottom, 16px)) 18px !important;
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.15) !important;
  }

  /* Utility Cards in Mobile */
  .utility-panel {
    display: flex !important;
    flex-direction: column !important;
    gap: 14px !important;
  }

  .utility-card {
    padding: 16px !important;
    border-radius: 20px !important;
  }
}

/* --------------------------------------------------------------------------
   BREAKPOINT 4: VERY SMALL MOBILE SCREENS (< 480px / 320px - 479px)
   -------------------------------------------------------------------------- */
@media (max-width: 479px) {
  .topbar {
    padding: 0 10px !important;
    height: 56px !important;
  }

  .dashboard-flex-container {
    padding: 12px 10px 80px 10px !important;
    gap: 16px !important;
  }

  .hero-greeting-card {
    padding: 14px !important;
  }

  .hero-greeting-card h1 {
    font-size: 1.15rem !important;
  }

  .stats-cards-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 8px !important;
  }

  .stat-card {
    padding: 10px !important;
    gap: 8px !important;
  }

  .stat-card > div:first-child {
    width: 32px !important;
    height: 32px !important;
    font-size: 0.9rem !important;
  }

  .stat-card .text-2xl {
    font-size: 1.1rem !important;
  }

  .stat-card .text-xs {
    font-size: 0.7rem !important;
  }

  #btn-hold-to-delete {
    min-width: 150px !important;
    padding: 8px 12px !important;
    font-size: 0.75rem !important;
  }

  .subject-chip-btn {
    padding: 6px 8px !important;
    font-size: 0.72rem !important;
  }

  .topic-checkbox-btn {
    padding: 4px 8px !important;
    font-size: 0.72rem !important;
  }

  .fab-new-note {
    width: 48px !important;
    height: 48px !important;
    bottom: calc(70px + env(safe-area-inset-bottom, 0px)) !important;
    right: 14px !important;
  }

  .fab-new-note i {
    font-size: 1.25rem !important;
  }
}

/* --------------------------------------------------------------------------
   ACCESSIBILITY & PREFERS-REDUCED-MOTION
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  .sidebar,
  .topbar,
  .fab-new-note,
  .modal-header-actions,
  .markdown-toolbar,
  .modal-footer,
  .note-actions,
  .mobile-bottom-bar,
  .graph-controls-overlay,
  .spatial-controls-bar {
    display: none !important;
  }

  body,
  .app-container,
  .main-wrapper,
  .modal-sheet {
    background: #FFFFFF !important;
    color: #000000 !important;
    box-shadow: none !important;
    border: none !important;
  }
}

/* --------------------------------------------------------------------------
   ZEN FOCUS MODE & AUTHENTIC BLACKBOARD / CHALKBOARD THEME
   -------------------------------------------------------------------------- */
/* Hide scrollbars across Focus Mode while keeping full scroll functionality */
.focus-modal-overlay,
.focus-canvas-wrapper,
.focus-board-frame,
.focus-textarea,
.focus-preview-pane,
.focus-modal-overlay * {
  scrollbar-width: none !important; /* Firefox */
  -ms-overflow-style: none !important; /* IE and Edge */
}

.focus-modal-overlay::-webkit-scrollbar,
.focus-canvas-wrapper::-webkit-scrollbar,
.focus-board-frame::-webkit-scrollbar,
.focus-textarea::-webkit-scrollbar,
.focus-preview-pane::-webkit-scrollbar,
.focus-modal-overlay *::-webkit-scrollbar {
  display: none !important; /* Chrome, Safari, Edge, Opera */
  width: 0 !important;
  height: 0 !important;
}

/* Online Google Chalkboard Font Classes */
.focus-font-chalk,
.focus-font-chalk * {
  font-family: 'Kalam', 'Caveat', cursive !important;
  letter-spacing: 0.4px !important;
}

.focus-font-sketch,
.focus-font-sketch * {
  font-family: 'Cabin Sketch', cursive !important;
  font-weight: 700 !important;
  letter-spacing: 0.6px !important;
}

.focus-font-hand,
.focus-font-hand * {
  font-family: 'Patrick Hand', 'Architects Daughter', cursive !important;
  letter-spacing: 0.3px !important;
}

.focus-font-sans,
.focus-font-sans * {
  font-family: 'Plus Jakarta Sans', 'Outfit', sans-serif !important;
  letter-spacing: normal !important;
}

/* Light Theme Focus (Default) */
.focus-modal-overlay:not(.blackboard-mode) {
  background-color: #FAFAF9;
  color: #1C1917;
}

.focus-modal-overlay:not(.blackboard-mode) .focus-board-frame {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 20px;
  box-shadow: 0 20px 45px -15px rgba(0, 0, 0, 0.08);
}

.focus-modal-overlay:not(.blackboard-mode) .focus-title {
  color: #1E293B;
}

.focus-modal-overlay:not(.blackboard-mode) .focus-divider {
  background: linear-gradient(90deg, #FF6B00, #FCD34D, transparent);
  height: 2px;
}

.focus-modal-overlay:not(.blackboard-mode) .focus-format-bar {
  background-color: #F1F5F9;
  border-color: #CBD5E1;
  color: #475569;
}

.focus-modal-overlay:not(.blackboard-mode) .focus-format-bar .focus-fmt-btn:hover {
  background-color: #E2E8F0;
  color: #0F172A;
}

.focus-board-frame.is-split {
  max-width: 82rem !important;
}

.focus-board-frame.is-split .focus-editor-container {
  display: flex !important;
  flex-direction: row !important;
  gap: 2rem !important;
}

.focus-board-frame.is-split .focus-textarea,
.focus-board-frame.is-split .focus-preview-pane {
  flex: 1 !important;
  width: 50% !important;
  min-width: 0 !important;
  display: block !important;
}

.focus-modal-overlay:not(.blackboard-mode) .focus-board-frame.is-split .focus-preview-pane {
  border-left: 1px dashed #CBD5E1;
  padding-left: 1.5rem;
}

.focus-modal-overlay.blackboard-mode .focus-board-frame.is-split .focus-preview-pane {
  border-left: 1px dashed rgba(254, 240, 138, 0.25);
  padding-left: 1.5rem;
}

/* Authentic Academic Blackboard / Chalkboard Dark Mode */
.focus-modal-overlay.blackboard-mode {
  background-color: #111814 !important;
  background-image: 
    radial-gradient(ellipse at 50% 10%, rgba(35, 52, 43, 0.8) 0%, rgba(14, 20, 17, 0.98) 75%),
    radial-gradient(#203027 1px, transparent 1px) !important;
  background-size: 100% 100%, 28px 28px !important;
  color: #F8FAFC !important;
}

.focus-modal-overlay.blackboard-mode .focus-topbar {
  background-color: rgba(14, 20, 17, 0.95) !important;
  border-bottom-color: #24342b !important;
}

.focus-modal-overlay.blackboard-mode #focus-mode-badge {
  background-color: #1e2c24 !important;
  color: #86EFAC !important;
  border: 1px solid #32473b !important;
}

.focus-modal-overlay.blackboard-mode #focus-read-estimate {
  color: #94A3B8 !important;
}

.focus-modal-overlay:not(.blackboard-mode) .focus-mode-join,
.focus-modal-overlay:not(.blackboard-mode) .focus-font-join {
  background-color: #F1F5F9 !important;
  border-color: #E2E8F0 !important;
}

.focus-modal-overlay:not(.blackboard-mode) .focus-mode-join button,
.focus-modal-overlay:not(.blackboard-mode) .focus-font-join button {
  background-color: transparent !important;
  color: #64748B !important;
  border: none !important;
}

.focus-modal-overlay:not(.blackboard-mode) .focus-mode-join button:hover,
.focus-modal-overlay:not(.blackboard-mode) .focus-font-join button:hover {
  background-color: rgba(0, 0, 0, 0.05) !important;
  color: #0F172A !important;
}

.focus-modal-overlay:not(.blackboard-mode) .focus-mode-join button.active,
.focus-modal-overlay:not(.blackboard-mode) .focus-font-join button.active {
  background-color: #FFFFFF !important;
  color: #0F172A !important;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1) !important;
}

.focus-modal-overlay.blackboard-mode .focus-mode-join,
.focus-modal-overlay.blackboard-mode .focus-font-join {
  background-color: #16201b !important;
  border-color: #2b3d32 !important;
}

.focus-modal-overlay.blackboard-mode .focus-mode-join button,
.focus-modal-overlay.blackboard-mode .focus-font-join button {
  background-color: transparent !important;
  color: #94A3B8 !important;
  border: none !important;
  box-shadow: none !important;
}

.focus-modal-overlay.blackboard-mode .focus-mode-join button:hover,
.focus-modal-overlay.blackboard-mode .focus-font-join button:hover {
  background-color: rgba(255, 255, 255, 0.08) !important;
  color: #F8FAFC !important;
}

.focus-modal-overlay.blackboard-mode .focus-mode-join button.active,
.focus-modal-overlay.blackboard-mode .focus-font-join button.active {
  background-color: #283a30 !important;
  color: #FEF08A !important;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5) !important;
}

.focus-modal-overlay.blackboard-mode #focus-theme-btn {
  background-color: #202e26 !important;
  color: #FEF08A !important;
  border-color: #384e41 !important;
}

.focus-modal-overlay.blackboard-mode #focus-exit-btn {
  background-color: #223229 !important;
  color: #F8FAFC !important;
  border: 1px solid #3c5447 !important;
}

.focus-modal-overlay.blackboard-mode #focus-exit-btn:hover {
  background-color: #2d4236 !important;
}

/* Blackboard Board Frame with Wood Edge Styling */
.focus-modal-overlay.blackboard-mode .focus-board-frame {
  background-color: #15201a;
  background-image: 
    radial-gradient(ellipse at 40% 25%, rgba(42, 64, 52, 0.7) 0%, rgba(16, 24, 20, 0.98) 75%),
    radial-gradient(#26392f 1.2px, transparent 1.2px);
  background-size: 100% 100%, 28px 28px;
  border: 10px solid #281d15;
  border-radius: 22px;
  box-shadow: 
    0 25px 65px -10px rgba(0, 0, 0, 0.8),
    inset 0 0 50px rgba(0, 0, 0, 0.6),
    inset 0 0 120px rgba(10, 15, 12, 0.7),
    0 0 0 2px #443022,
    0 0 0 4px #1c140e;
}

/* Blackboard Chalk Typography & Natural Chalk Texture */
.focus-modal-overlay.blackboard-mode .focus-title {
  font-family: 'Kalam', 'Cabin Sketch', 'Caveat', cursive !important;
  color: #FFFFFF !important;
  text-shadow: 
    0 0 1px rgba(255, 255, 255, 0.95),
    0 0 8px rgba(254, 240, 138, 0.45),
    1px 1px 3px rgba(0, 0, 0, 0.85);
  letter-spacing: 0.5px;
}

.focus-modal-overlay.blackboard-mode .focus-title::placeholder {
  color: #4a6256 !important;
}

.focus-modal-overlay.blackboard-mode .focus-divider {
  background: linear-gradient(90deg, #FDE047 0%, #86EFAC 45%, #93C5FD 80%, transparent 100%) !important;
  box-shadow: 0 0 12px rgba(253, 224, 71, 0.55);
  opacity: 0.9;
  height: 2px;
}

.focus-modal-overlay.blackboard-mode .focus-textarea {
  color: #F8FAFC !important;
  text-shadow: 
    0 0 1px rgba(255, 255, 255, 0.85),
    0 0 5px rgba(248, 250, 252, 0.22),
    1px 1px 2px rgba(0, 0, 0, 0.9);
  caret-color: #FEF08A;
  line-height: 1.85;
  letter-spacing: 0.4px;
}

.focus-modal-overlay.blackboard-mode .focus-textarea::placeholder {
  color: #455d51 !important;
}

/* Blackboard Chalk Markdown & KaTeX Preview Styling */
.focus-modal-overlay.blackboard-mode .focus-preview-pane {
  color: #F8FAFC !important;
  line-height: 1.85;
  letter-spacing: 0.4px;
}

.focus-modal-overlay.blackboard-mode .focus-preview-pane h1,
.focus-modal-overlay.blackboard-mode .focus-preview-pane h2,
.focus-modal-overlay.blackboard-mode .focus-preview-pane h3 {
  font-family: 'Kalam', 'Cabin Sketch', cursive !important;
  color: #FEF08A !important;
  text-shadow: 0 0 3px rgba(254, 240, 138, 0.65), 1px 1px 2px rgba(0,0,0,0.85);
  border-bottom: 2px dashed rgba(254, 240, 138, 0.3) !important;
  padding-bottom: 6px;
  margin-top: 1.2em;
  margin-bottom: 0.6em;
}

.focus-modal-overlay.blackboard-mode .focus-preview-pane strong {
  color: #FEF08A !important;
  text-shadow: 0 0 2px rgba(254, 240, 138, 0.5);
}

.focus-modal-overlay.blackboard-mode .focus-preview-pane em {
  color: #86EFAC !important;
  text-shadow: 0 0 2px rgba(134, 239, 172, 0.4);
}

.focus-modal-overlay.blackboard-mode .focus-preview-pane del {
  color: #F87171 !important;
  opacity: 0.8;
}

.focus-modal-overlay.blackboard-mode .focus-preview-pane ul,
.focus-modal-overlay.blackboard-mode .focus-preview-pane ol {
  padding-left: 1.8rem;
  margin: 0.8em 0;
}

.focus-modal-overlay.blackboard-mode .focus-preview-pane li::marker {
  color: #FDE047;
}

.focus-modal-overlay.blackboard-mode .focus-preview-pane code {
  font-family: 'JetBrains Mono', monospace !important;
  background: #0d1411 !important;
  color: #86EFAC !important;
  border: 1px solid #23342b !important;
  padding: 2px 8px;
  border-radius: 6px;
}

.focus-modal-overlay.blackboard-mode .focus-preview-pane pre {
  background: #0d1411 !important;
  border: 1px solid #23342b !important;
  border-radius: 14px;
  box-shadow: inset 0 0 20px rgba(0,0,0,0.5);
  padding: 14px 18px;
}

.focus-modal-overlay.blackboard-mode .focus-preview-pane blockquote {
  border-left: 4px solid #FDE047 !important;
  background: rgba(254, 240, 138, 0.08) !important;
  color: #F1F5F9 !important;
  border-radius: 0 12px 12px 0;
  padding: 10px 18px;
  margin: 1.2em 0;
}

.focus-modal-overlay.blackboard-mode .focus-preview-pane hr {
  border-color: rgba(254, 240, 138, 0.35) !important;
  border-style: dashed;
  margin: 1.6em 0;
}

.focus-modal-overlay.blackboard-mode .focus-preview-pane .katex {
  color: #FEF9C3 !important;
  font-size: 1.22em;
  text-shadow: 0 0 3px rgba(254, 249, 195, 0.65), 1px 1px 2px rgba(0,0,0,0.85);
}

.focus-modal-overlay.blackboard-mode .focus-preview-pane .katex-display {
  padding: 18px 26px;
  background: rgba(12, 19, 16, 0.8);
  border-radius: 16px;
  border: 1.5px dashed rgba(254, 240, 138, 0.45);
  box-shadow: inset 0 0 25px rgba(0,0,0,0.5);
  margin: 1.6em 0;
}

/* ==========================================================================
   IOS 18 MODERN LIGHT NOTES DASHBOARD SYSTEM
   ========================================================================== */

/* Digital Sticky Note Cards for Pinned Section */
.sticky-note-card {
  position: relative;
  border-radius: 1.25rem;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 180px;
  box-shadow: 0 2px 10px -2px rgba(0, 0, 0, 0.04);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  border-width: 1px;
}

.sticky-note-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 25px -4px rgba(0, 0, 0, 0.08);
}

.sticky-note-card.sticky-yellow {
  background-color: #FEF9C3;
  border-color: #FEF08A;
  color: #713F12;
}

.sticky-note-card.sticky-rose {
  background-color: #FFE4E6;
  border-color: #FECDD3;
  color: #881337;
}

.sticky-note-card.sticky-sky {
  background-color: #E0F2FE;
  border-color: #BAE6FD;
  color: #0C4A6E;
}

.sticky-note-card.sticky-mint {
  background-color: #DCFCE7;
  border-color: #BBF7D0;
  color: #14532D;
}

.sticky-note-card.sticky-purple {
  background-color: #F3E8FF;
  border-color: #E9D5FF;
  color: #581C87;
}

/* Category Filter Chips */
.chip-filter-btn {
  cursor: pointer;
  user-select: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.chip-filter-btn.active {
  background-color: #000080 !important;
  color: #FFFFFF !important;
  border-color: #000080 !important;
  box-shadow: 0 2px 8px -1px rgba(0, 0, 128, 0.35);
}

/* Mini Interactive Calendar Grid */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  text-align: center;
}

.calendar-grid .cal-header-day {
  font-size: 11px;
  font-weight: 700;
  color: #94A3B8;
  padding: 4px 0;
  text-transform: uppercase;
}

.calendar-grid .cal-cell {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 500;
  color: #334155;
  border-radius: 9999px;
  cursor: pointer;
  position: relative;
  transition: all 0.15s ease;
  user-select: none;
}

.calendar-grid .cal-cell:hover:not(.empty) {
  background-color: #F1F5F9;
  color: #0F172A;
}

.calendar-grid .cal-cell.today-active {
  background-color: #000080 !important;
  color: #FFFFFF !important;
  font-weight: 700 !important;
  box-shadow: 0 2px 8px -1px rgba(0, 0, 128, 0.4);
}

.calendar-grid .cal-cell.has-notes::after {
  content: '';
  position: absolute;
  bottom: 2px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: #FF9933;
}

.calendar-grid .cal-cell.today-active.has-notes::after {
  background-color: #FFFFFF;
}

.calendar-grid .cal-cell.other-month {
  color: #CBD5E1;
  cursor: default;
}

/* Today Agenda List Tasks */
.today-task-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.35rem 0.5rem;
  border-radius: 0.75rem;
  transition: background-color 0.15s ease;
  cursor: pointer;
}

.today-task-item:hover {
  background-color: #F8FAFC;
}

.today-task-item.completed span.task-text {
  text-decoration: line-through;
  color: #94A3B8;
}

/* Tag colored dot list in sidebar */
.tag-sidebar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 500;
  color: #475569;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tag-sidebar-row:hover {
  background-color: #F8FAFC;
  color: #0F172A;
}

.tag-sidebar-row.active {
  background-color: #EBF4FF;
  color: #000080;
  font-weight: 600;
}

/* Utility Cards subtle depth */
.utility-card {
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.utility-card:hover {
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.04);
}

/* ==========================================================================
   3-SECOND HOLD TO DELETE BUTTON
   ========================================================================== */
#btn-hold-to-delete {
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  position: relative;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

#btn-hold-to-delete.is-holding {
  transform: scale(0.97);
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.3);
}

#delete-hold-progress {
  transition: width 0.04s linear;
}

/* ==========================================================================
   PROFILE SUBJECT & TOPIC CHECKBOX CHIPS
   ========================================================================== */
.subject-chip-btn.active {
  background-color: #EBF4FF !important;
  color: #000080 !important;
  border-color: #000080 !important;
  font-weight: 600 !important;
  box-shadow: 0 1px 3px rgba(0, 0, 128, 0.1);
}

.topic-checkbox-btn {
  user-select: none;
  cursor: pointer;
}

.topic-checkbox-btn.is-checked {
  background-color: #EBF4FF !important;
  color: #000080 !important;
  border-color: #000080 !important;
  font-weight: 600 !important;
}

/* ==========================================================================
   📱 ULTRA-RESPONSIVE MULTI-DEVICE DESIGN SYSTEM (PRODUCTION-READY)
   ========================================================================== */

/* Safe-area insets & dynamic viewport anchors */
:root {
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
}

/* Mobile Sidebar Drawer Backdrop */
.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 95;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.48s cubic-bezier(0.25, 1, 0.5, 1);
  will-change: opacity;
}

.sidebar-backdrop.active {
  opacity: 1;
  pointer-events: auto;
  transition: opacity 0.52s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Hide mobile navigation and FAB on Desktop & Tablet (>= 768px) */
.mobile-bottom-nav,
.mobile-fab-btn {
  display: none !important;
}

.mobile-dock-inner {
  display: flex;
  align-items: center;
  justify-content: space-around;
  width: 100%;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(28px) saturate(200%);
  -webkit-backdrop-filter: blur(28px) saturate(200%);
  border: 1.5px solid rgba(255, 255, 255, 0.92);
  border-radius: 9999px;
  padding: 6px 8px;
  box-shadow: 
    0 22px 50px -10px rgba(0, 0, 70, 0.16),
    0 8px 22px -4px rgba(255, 153, 51, 0.12),
    0 2px 6px rgba(0, 0, 0, 0.04),
    inset 0 1.5px 2px rgba(255, 255, 255, 1);
  pointer-events: auto !important;
  gap: 4px;
}

.mobile-tab-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 8px 6px;
  border-radius: 9999px;
  color: #64748B;
  transition: all 0.28s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  touch-action: manipulation;
  cursor: pointer;
  background: transparent;
  border: none;
  gap: 2px;
  text-decoration: none;
}

.mobile-tab-btn:hover {
  color: #000080;
  background: rgba(0, 0, 128, 0.04);
}

.mobile-tab-btn:active {
  transform: scale(0.9);
}

.mobile-tab-btn i {
  font-size: 1.25rem;
  line-height: 1;
  transition: transform 0.28s cubic-bezier(0.34, 1.56, 0.64, 1), color 0.2s ease;
}

.mobile-tab-btn .tab-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.1;
  transition: color 0.2s ease;
}

/* Trending Active Capsule Tab */
.mobile-tab-btn.active {
  background: linear-gradient(135deg, rgba(255, 153, 51, 0.16) 0%, rgba(0, 0, 128, 0.08) 100%) !important;
  color: #000080 !important;
  box-shadow: 0 4px 14px -2px rgba(255, 153, 51, 0.2), inset 0 0 0 1px rgba(255, 153, 51, 0.3);
}

.mobile-tab-btn.active i {
  color: #FF9933;
  transform: scale(1.18) translateY(-1.5px);
}

.mobile-tab-btn.active .tab-label {
  color: #000080;
  font-weight: 700;
}

/* Activate only on Mobile Viewports (< 768px) */
@media (max-width: 767px) {
  .mobile-bottom-nav {
    display: flex !important;
    position: fixed !important;
    bottom: calc(14px + var(--safe-bottom, 0px)) !important;
    left: 14px !important;
    right: 14px !important;
    max-width: 440px !important;
    margin: 0 auto !important;
    height: auto !important;
    padding: 0 !important;
    z-index: 40 !important;
    pointer-events: none !important;
    justify-content: center !important;
  }

  .mobile-fab-btn {
    display: flex !important;
    bottom: calc(88px + var(--safe-bottom, 0px)) !important;
    right: 18px !important;
    box-shadow: 0 14px 30px -4px rgba(255, 153, 51, 0.5), 0 6px 12px -2px rgba(255, 153, 51, 0.3) !important;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease;
  }

  .mobile-fab-btn:active {
    transform: scale(0.92);
  }
}

/* --------------------------------------------------------------------------
   BREAKPOINT 1: LAPTOP & DESKTOP COMPACT (max-width: 1279px)
   -------------------------------------------------------------------------- */
@media (max-width: 1279px) {
  .dashboard-flex-container {
    flex-direction: column !important;
    gap: 1.5rem !important;
  }

  .utility-panel {
    width: 100% !important;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
    space-y: 0 !important;
  }
}

/* --------------------------------------------------------------------------
   BREAKPOINT 2: TABLET (max-width: 1023px)
   -------------------------------------------------------------------------- */
@media (max-width: 1023px) {
  .sidebar {
    position: fixed !important;
    left: 0;
    top: 0;
    bottom: 0;
    width: 280px !important;
    max-width: 85vw !important;
    height: 100% !important;
    height: 100dvh !important;
    z-index: 100 !important;
    transform: translateX(-100%) !important;
    transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1) !important;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25) !important;
  }

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

  .notes-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 1rem !important;
  }

  .stats-cards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.75rem !important;
  }
}

/* --------------------------------------------------------------------------
   BREAKPOINT 3: MOBILE (max-width: 767px)
   -------------------------------------------------------------------------- */
@media (max-width: 767px) {
  .content-canvas {
    padding: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
  }

  .dashboard-flex-container {
    padding: 8px 6px 80px 6px !important;
    gap: 10px !important;
    width: 100% !important;
  }

  .main-wrapper {
    padding-bottom: calc(76px + var(--safe-bottom)) !important;
    padding-left: 0 !important;
    padding-right: 0 !important;
  }

  .hero-greeting-card {
    padding: 1rem 0.875rem !important;
  }

  .stat-card {
    padding: 0.75rem 0.625rem !important;
  }

  .notes-grid {
    grid-template-columns: 1fr !important;
    gap: 0.75rem !important;
  }

  .filter-chips-row {
    display: flex !important;
    align-items: center !important;
    overflow-x: auto !important;
    overflow-y: hidden !important;
    flex-wrap: nowrap !important;
    scrollbar-width: none !important;
    -ms-overflow-style: none !important;
    -webkit-overflow-scrolling: touch !important;
    padding: 2px 2px 4px 2px !important;
    gap: 0.375rem !important;
    max-width: 100% !important;
  }

  .filter-chips-row::-webkit-scrollbar {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
  }

  .chip-filter-btn {
    flex-shrink: 0 !important;
    white-space: nowrap !important;
    height: 32px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
  }

  .filter-controls-row {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.625rem !important;
    overflow: visible !important;
  }

  /* Brain Constellation Graph Mobile Overlays */
  .graph-controls-overlay {
    top: 10px !important;
    left: 10px !important;
    right: 10px !important;
    width: auto !important;
    max-width: calc(100% - 20px) !important;
    padding: 8px 12px !important;
    border-radius: 16px !important;
    justify-content: space-between !important;
  }

  .graph-legend-overlay {
    bottom: calc(34px + var(--safe-bottom, 0px)) !important;
    left: 12px !important;
    right: auto !important;
    padding: 5px 12px !important;
    border-radius: 9999px !important;
    font-size: 10.5px !important;
    gap: 8px !important;
    max-width: calc(100% - 92px) !important;
    white-space: nowrap !important;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08) !important;
  }

  /* Study Path Roadmap on Mobile */
  #view-container-path,
  #view-container-daily {
    padding: 10px 8px 84px 8px !important;
    width: 100% !important;
  }

  .study-path-header {
    gap: 10px !important;
    margin-bottom: 16px !important;
    padding-bottom: 12px !important;
  }

  .study-path-timeline {
    padding-left: 0 !important;
  }

  .study-path-timeline::before {
    left: 17px !important;
    top: 12px !important;
    bottom: 12px !important;
  }

  .study-path-step {
    gap: 12px !important;
  }

  .step-marker {
    width: 36px !important;
    height: 36px !important;
    border-radius: 12px !important;
    font-size: 0.85rem !important;
  }

  .step-card {
    padding: 12px 14px !important;
    border-radius: 16px !important;
  }

  /* Spatial Board Canvas on Mobile */
  .spatial-view-container {
    height: calc(100vh - 60px - var(--safe-bottom)) !important;
    height: calc(100dvh - 60px - var(--safe-bottom)) !important;
  }

  .spatial-controls-bar {
    top: 8px !important;
    left: 10px !important;
    right: 10px !important;
    width: auto !important;
    max-width: calc(100% - 20px) !important;
    padding: 6px 10px !important;
    border-radius: 16px !important;
    justify-content: space-between !important;
    z-index: 30 !important;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08) !important;
  }

  .spatial-canvas-board {
    padding-top: 55px !important;
    padding-bottom: calc(90px + var(--safe-bottom)) !important;
    min-height: 100% !important;
    overflow: auto !important;
    -webkit-overflow-scrolling: touch !important;
  }

  .spatial-card {
    width: 160px !important;
    min-height: 118px !important;
    max-height: 155px !important;
    padding: 9px 10px !important;
    border-radius: 14px !important;
    touch-action: none !important;
    box-shadow: 0 4px 14px -2px rgba(0, 0, 0, 0.08) !important;
    overflow: hidden !important;
  }

  .spatial-card h4 {
    font-size: 12px !important;
    margin-bottom: 2px !important;
    line-height: 1.25 !important;
  }

  .spatial-card p {
    font-size: 10px !important;
    line-height: 1.35 !important;
    -webkit-line-clamp: 3 !important;
  }

  .spatial-card .note-type-badge {
    font-size: 0.6rem !important;
    padding: 1px 4px !important;
  }

  /* iOS-Style Full-Screen Mobile Note Editor */
  #editor-modal .modal-sheet {
    width: 100vw !important;
    max-width: 100vw !important;
    height: 100% !important;
    height: 100dvh !important;
    max-height: 100dvh !important;
    border-radius: 0 !important;
    margin: 0 !important;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    padding: 0 !important;
    display: flex !important;
    flex-direction: column !important;
    z-index: 200 !important;
  }

  #editor-modal .modal-header {
    padding: 0.625rem 0.75rem !important;
    padding-top: calc(0.625rem + var(--safe-top)) !important;
    flex-shrink: 0 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    gap: 0.375rem !important;
  }

  #editor-modal .modal-header-left {
    display: flex !important;
    align-items: center !important;
    gap: 0.375rem !important;
    flex-shrink: 0 !important;
  }

  #editor-modal .modal-header-actions {
    display: flex !important;
    align-items: center !important;
    gap: 0.25rem !important;
    flex-shrink: 0 !important;
  }

  #editor-modal .modal-header .btn {
    height: 30px !important;
    min-height: 30px !important;
    border-radius: 10px !important;
    padding: 0 8px !important;
    font-size: 11px !important;
  }

  #editor-modal .modal-header .btn.btn-square {
    width: 30px !important;
    min-width: 30px !important;
    padding: 0 !important;
  }

  #editor-modal .modal-body {
    flex: 1 1 0% !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    padding: 0.875rem !important;
    display: flex !important;
    flex-direction: column !important;
  }

  #editor-modal .editor-dna-bar {
    padding: 6px 10px !important;
    border-radius: 12px !important;
    margin-bottom: 8px !important;
    background: #F8FAFC !important;
  }

  #editor-modal .markdown-toolbar {
    padding: 4px 6px !important;
    overflow-x: auto !important;
    flex-wrap: nowrap !important;
    scrollbar-width: none !important;
    -ms-overflow-style: none !important;
    -webkit-overflow-scrolling: touch !important;
    position: sticky !important;
    top: 0 !important;
    z-index: 10 !important;
    background: #F1F5F9 !important;
    border-radius: 12px !important;
    gap: 3px !important;
    min-height: 38px !important;
  }

  #editor-modal .markdown-toolbar .btn {
    height: 28px !important;
    min-height: 28px !important;
    min-width: 28px !important;
    padding: 0 6px !important;
    border-radius: 7px !important;
    font-size: 11px !important;
  }

  #editor-modal .markdown-toolbar::-webkit-scrollbar {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
  }

  #editor-modal .editor-meta-bar {
    display: flex !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.625rem !important;
    padding-bottom: 0.625rem !important;
  }

  #editor-modal .color-picker-group {
    display: flex !important;
    align-items: center !important;
    gap: 0.5rem !important;
    overflow-x: auto !important;
    scrollbar-width: none !important;
    -webkit-overflow-scrolling: touch !important;
    padding: 6px 4px !important;
    min-height: 40px !important;
  }

  #editor-modal .color-picker-group::-webkit-scrollbar {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
  }

  #editor-modal .tags-editor-wrapper {
    display: flex !important;
    align-items: center !important;
    flex-wrap: wrap !important;
    gap: 0.375rem !important;
    width: 100% !important;
    padding-top: 2px !important;
  }

  #editor-modal .modal-footer {
    padding: 0.5rem 0.75rem !important;
    padding-bottom: calc(0.5rem + var(--safe-bottom)) !important;
    flex-shrink: 0 !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    gap: 0.25rem !important;
    text-align: center !important;
  }

  #editor-modal .editor-stats {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 0.375rem !important;
    font-size: 11px !important;
    flex-wrap: wrap !important;
  }

  /* Mobile Modals: Bottom Sheet Slide-Up */
  #timemachine-modal .modal-sheet,
  #stats-modal .modal-sheet,
  #shortcuts-modal .modal-sheet,
  #settings-modal .modal-sheet,
  #user-profile-modal .modal-sheet,
  #quick-task-modal .modal-sheet,
  #quick-tag-modal .modal-sheet,
  #confirm-delete-modal .modal-sheet,
  #voice-reflection-modal .modal-sheet,
  #evolution-player-modal .modal-sheet {
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100vw !important;
    max-width: 100vw !important;
    max-height: 90dvh !important;
    margin: 0 !important;
    border-radius: 24px 24px 0 0 !important;
    padding: 0.75rem 1.25rem calc(1.5rem + var(--safe-bottom)) 1.25rem !important;
    box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.2) !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
  }
}

/* ==========================================================================
   📱 BOTTOM SHEET DRAG-TO-DISMISS CONTROLLER & HANDLE
   ========================================================================== */
.modal-drag-handle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 6px 0 10px 0;
  margin-top: -2px;
  cursor: grab;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  flex-shrink: 0;
  z-index: 10;
}

.modal-drag-handle:active,
.modal-drag-handle.is-dragging {
  cursor: grabbing;
}

.modal-drag-handle .handle-bar {
  display: block;
  width: 44px;
  height: 5px;
  background-color: #CBD5E1;
  border-radius: 999px;
  transition: background-color 0.2s ease, transform 0.2s ease;
  pointer-events: none;
}

.modal-drag-handle:hover .handle-bar,
.modal-drag-handle.is-dragging .handle-bar {
  background-color: #94A3B8;
  transform: scaleY(1.25);
}

.modal-sheet.is-dragging {
  user-select: none !important;
  -webkit-user-select: none !important;
  will-change: transform;
}

/* --------------------------------------------------------------------------
   BREAKPOINT 4: VERY SMALL MOBILE (max-width: 479px / down to 320px)
   -------------------------------------------------------------------------- */
@media (max-width: 479px) {
  .topbar {
    padding-left: 0.75rem !important;
    padding-right: 0.75rem !important;
  }

  .hero-greeting-card {
    padding: 1rem !important;
    border-radius: 1.25rem !important;
  }

  .hero-greeting-card h1 {
    font-size: clamp(1.2rem, 5vw, 1.5rem) !important;
  }

  .stats-cards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.5rem !important;
  }

  .stat-card {
    padding: 0.75rem !important;
    gap: 0.5rem !important;
    border-radius: 0.875rem !important;
  }

  .stat-card .w-12 {
    width: 2.25rem !important;
    height: 2.25rem !important;
    font-size: 1rem !important;
  }

  .stat-card .text-2xl {
    font-size: 1.25rem !important;
  }

  .stat-card .text-xs {
    font-size: 0.65rem !important;
  }

  .note-card {
    padding: 0.875rem !important;
    border-radius: 1rem !important;
  }

  .note-card-title {
    font-size: 0.95rem !important;
  }

  .note-card-snippet {
    font-size: 0.8rem !important;
    -webkit-line-clamp: 3 !important;
  }

  /* Safe word-wrapping everywhere to prevent horizontal overflow */
  .note-card-title,
  .note-card-snippet,
  .markdown-body,
  .katex-display {
    overflow-wrap: break-word !important;
    word-break: break-word !important;
  }

  pre, code {
    white-space: pre-wrap !important;
    word-break: break-all !important;
  }
}

/* --------------------------------------------------------------------------
   TOUCH-DEVICE ERGONOMICS (Touch Alternatives for Hover Actions)
   -------------------------------------------------------------------------- */
@media (hover: none) and (pointer: coarse) {
  .note-card-actions {
    opacity: 0.9 !important;
    pointer-events: auto !important;
  }

  .btn, .nav-item, .chip-filter-btn, .mobile-tab-btn, .subject-chip-btn, .topic-checkbox-btn {
    min-height: 40px;
  }
}

/* --------------------------------------------------------------------------
   ACCESSIBILITY: PREFERS REDUCED MOTION
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   🎙️ FEATURE 5: LOCAL VOICE REFLECTIONS STUDIO STYLING (PURE LIGHT MODE)
   ========================================================================== */
.voice-stage-box {
  background: linear-gradient(135deg, rgba(255, 247, 237, 0.9) 0%, rgba(254, 243, 199, 0.6) 40%, rgba(239, 246, 255, 0.8) 100%) !important;
  border: 1.5px solid rgba(255, 153, 51, 0.25) !important;
}

#voice-waveform-canvas {
  filter: drop-shadow(0 2px 6px rgba(255, 153, 51, 0.25));
}

.voice-record-btn {
  position: relative;
  overflow: hidden;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.voice-record-btn.recording {
  background: linear-gradient(135deg, #EF4444 0%, #DC2626 100%) !important;
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.35), 0 8px 24px rgba(239, 68, 68, 0.5) !important;
}

.voice-record-btn.recording .voice-rec-dot {
  background-color: #FEE2E2 !important;
  animation: ping 1s cubic-bezier(0, 0, 0.2, 1) infinite;
}

#voice-transcript-output {
  min-height: 120px;
  line-height: 1.6;
}

#voice-transcript-output:focus {
  background-color: #FFFFFF;
}

#voice-interim-preview {
  transition: opacity 0.2s ease;
}

/* ==========================================================================
   ⏳ FEATURE 6: "IDEA EVOLUTION" KEYSTROKE TIME-LAPSE REPLAY STYLING
   ========================================================================== */
.evo-viewport {
  background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
  border: 1px solid #E2E8F0;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.02);
}

.evo-content-view {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.7;
  color: #1E293B;
  min-height: 160px;
}

/* Diff Glow Badges for Keystroke Insertions & Deletions */
.diff-add {
  background-color: rgba(16, 185, 129, 0.18) !important;
  color: #065F46 !important;
  border-bottom: 2px solid #10B981 !important;
  padding: 1px 2px;
  border-radius: 3px;
  text-decoration: none !important;
  font-weight: 600;
  display: inline;
}

.diff-del {
  background-color: rgba(244, 63, 94, 0.15) !important;
  color: #9F1239 !important;
  border-bottom: 2px solid #F43F5E !important;
  padding: 1px 2px;
  border-radius: 3px;
  text-decoration: line-through !important;
  font-weight: 500;
  display: inline;
}

.evo-speed-btn {
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
}

.evo-speed-btn.active {
  background-color: #000080 !important;
  color: #FFFFFF !important;
  box-shadow: 0 1px 3px rgba(0, 0, 128, 0.2);
}

.evo-speed-btn:hover:not(.active) {
  background-color: #F1F5F9;
  color: #0F172A;
}

#evo-scrubber-range {
  cursor: pointer;
}

#evo-scrubber-range::-webkit-slider-thumb {
  width: 18px;
  height: 18px;
  background: #000080;
  box-shadow: 0 2px 6px rgba(0, 0, 128, 0.35);
  border: 2px solid #FFFFFF;
}
/* ============================================================
   PWA INSTALL BANNER
   ============================================================ */
#pwa-install-banner {
  position: fixed;
  bottom: -120px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  width: min(480px, calc(100vw - 32px));
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 20px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.14), 0 2px 8px rgba(0,0,0,0.08);
  padding: 14px 16px;
  transition: bottom 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
  pointer-events: none;
  opacity: 0;
}

#pwa-install-banner.visible {
  bottom: 24px;
  pointer-events: all;
  opacity: 1;
}

.pwa-banner-inner {
  display: flex;
  align-items: center;
  gap: 12px;
}

.pwa-banner-icon { flex-shrink: 0; }

.pwa-banner-copy { flex: 1; min-width: 0; }

.pwa-banner-title {
  font-size: 13px;
  font-weight: 800;
  color: #0f172a;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pwa-banner-sub {
  font-size: 11px;
  color: #64748b;
  margin-top: 1px;
}

.pwa-cta {
  flex-shrink: 0;
  background: linear-gradient(135deg, #FF9933, #E67300);
  color: #ffffff;
  border: none;
  border-radius: 12px;
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
  box-shadow: 0 2px 8px rgba(255, 153, 51, 0.35);
}

.pwa-cta:hover { opacity: 0.9; transform: scale(1.03); }
.pwa-cta:active { transform: scale(0.97); }

.pwa-close {
  flex-shrink: 0;
  background: none;
  border: none;
  color: #94a3b8;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  padding: 4px;
  border-radius: 8px;
  transition: color 0.15s, background 0.15s;
}

.pwa-close:hover { color: #475569; background: #f1f5f9; }