@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

html {
  scroll-behavior: smooth;
}

#track-dropdown-section,
#semester-selector-section,
#program-level-section,
#step-1-degree-section,
#step-2-department-section,
#step-3-subject-section,
#step-4-semester-section,
#subjects-list-section,
#filter-summary-bar,
#subjects-grid {
  scroll-margin-top: 75px;
}

@media (min-width: 640px) {
  #track-dropdown-section,
  #semester-selector-section,
  #program-level-section,
  #step-1-degree-section,
  #step-2-department-section,
  #step-3-subject-section,
  #step-4-semester-section,
  #subjects-list-section,
  #filter-summary-bar,
  #subjects-grid {
    scroll-margin-top: 85px;
  }
}

:root, [data-theme="dark"], [data-theme="minimal"] {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Clean Minimal Dark Theme Default */
  --bg-primary: #09090b;
  --bg-secondary: #121215;
  --bg-tertiary: #18181b;
  --bg-card: #111217;
  --bg-card-hover: #16171d;
  --border-subtle: #27272a;
  --border-highlight: #3b82f6;

  --text-main: #f4f4f5;
  --text-muted: #a1a1aa;
  --text-dim: #71717a;

  --accent-primary: #3b82f6;
  --accent-secondary: #60a5fa;
  --accent-violet: #818cf8;
  --accent-glow: transparent;

  --badge-bg: rgba(255, 255, 255, 0.06);
  --badge-text: #e4e4e7;

  /* Professional Dark Mesh Gradient Background */
  --bg-gradient: 
    radial-gradient(ellipse 90% 50% at 50% -10%, rgba(99, 102, 241, 0.25), transparent 70%),
    radial-gradient(circle at 10% 25%, rgba(59, 130, 246, 0.15) 0%, transparent 45%),
    radial-gradient(circle at 90% 35%, rgba(139, 92, 246, 0.18) 0%, transparent 45%),
    radial-gradient(circle at 50% 65%, rgba(99, 102, 241, 0.08) 0%, transparent 55%),
    radial-gradient(circle at 85% 85%, rgba(14, 165, 233, 0.08) 0%, transparent 40%),
    linear-gradient(180deg, #080911 0%, #0d0f1a 45%, #06070c 100%);
}

[data-theme="dark"] .glass-panel,
[data-theme="minimal"] .glass-panel {
  background: #111217 !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  border-color: #27272a !important;
  box-shadow: none !important;
}

[data-theme="dark"] .glass-panel:hover,
[data-theme="minimal"] .glass-panel:hover {
  background: #16171d !important;
  border-color: #3f3f46 !important;
  box-shadow: none !important;
}

[data-theme="dark"] header,
[data-theme="dark"] #about-section,
[data-theme="minimal"] header,
[data-theme="minimal"] #about-section {
  background-color: #0c0d12 !important;
  border-color: #27272a !important;
  backdrop-filter: none !important;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 1);
  --border-subtle: #e2e8f0;
  --border-highlight: rgba(99, 102, 241, 0.5);

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;

  --accent-primary: #2563eb;
  --accent-secondary: #4f46e5;
  --accent-violet: #7c3aed;
  --accent-glow: rgba(99, 102, 241, 0.15);

  --badge-bg: rgba(79, 70, 229, 0.08);
  --badge-text: #4338ca;

  /* Professional Light Mesh Gradient Background */
  --bg-gradient: 
    radial-gradient(ellipse 90% 50% at 50% -10%, rgba(99, 102, 241, 0.12), transparent 70%),
    radial-gradient(circle at 10% 25%, rgba(59, 130, 246, 0.09) 0%, transparent 45%),
    radial-gradient(circle at 90% 35%, rgba(139, 92, 246, 0.09) 0%, transparent 45%),
    radial-gradient(circle at 50% 70%, rgba(226, 232, 240, 0.5) 0%, transparent 60%),
    linear-gradient(180deg, #f8fafc 0%, #f1f5f9 55%, #e2e8f0 100%);
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  background-size: 100% 100%;
  color: var(--text-main);
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Subtle Architectural Grid Texture */
.bg-grid-pattern {
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95) 0%, rgba(0, 0, 0, 0.8) 60%, rgba(0, 0, 0, 0.6) 100%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95) 0%, rgba(0, 0, 0, 0.8) 60%, rgba(0, 0, 0, 0.6) 100%);
  pointer-events: none;
  z-index: 0;
}

[data-theme="light"] .bg-grid-pattern {
  background-image: 
    linear-gradient(to right, rgba(15, 23, 42, 0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(15, 23, 42, 0.035) 1px, transparent 1px);
}

/* Ambient Floating Glow Orbs */
.ambient-orb {
  position: fixed;
  border-radius: 9999px;
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
}

.ambient-orb-1 {
  top: -120px;
  left: 20%;
  width: 650px;
  height: 520px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.22) 0%, rgba(59, 130, 246, 0.08) 50%, transparent 70%);
  animation: floatOrb 20s ease-in-out infinite alternate;
}

.ambient-orb-2 {
  top: 35%;
  right: -120px;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.18) 0%, rgba(236, 72, 153, 0.06) 50%, transparent 70%);
  animation: floatOrb 24s ease-in-out infinite alternate-reverse;
}

.ambient-orb-3 {
  bottom: 5%;
  left: -120px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.15) 0%, rgba(16, 185, 129, 0.06) 50%, transparent 70%);
  animation: floatOrb 22s ease-in-out infinite alternate;
}

[data-theme="light"] .ambient-orb-1 {
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, rgba(59, 130, 246, 0.04) 50%, transparent 70%);
}
[data-theme="light"] .ambient-orb-2 {
  background: radial-gradient(circle, rgba(168, 85, 247, 0.10) 0%, rgba(236, 72, 153, 0.03) 50%, transparent 70%);
}
[data-theme="light"] .ambient-orb-3 {
  background: radial-gradient(circle, rgba(14, 165, 233, 0.08) 0%, rgba(16, 185, 129, 0.03) 50%, transparent 70%);
}

@keyframes floatOrb {
  0% { transform: translateY(0px) scale(1); }
  50% { transform: translateY(25px) scale(1.04); }
  100% { transform: translateY(-20px) scale(0.96); }
}

/* Glassmorphism panel */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-panel:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-highlight);
  box-shadow: 0 16px 36px -12px var(--accent-glow);
}

/* Hero Radial Glow */
.hero-glow {
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 750px;
  height: 450px;
  background: radial-gradient(circle at center, rgba(99, 102, 241, 0.18) 0%, rgba(59, 130, 246, 0.12) 35%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}

[data-theme="light"] .hero-glow {
  background: radial-gradient(circle at center, rgba(99, 102, 241, 0.08) 0%, rgba(59, 130, 246, 0.05) 35%, transparent 70%);
}

/* ========================================================
   LIGHT MODE HIGH-CONTRAST & TEXT COLOR FIXES
   Resolves the issue of white text on light backgrounds
   ======================================================== */
[data-theme="light"] .text-white,
[data-theme="light"] .text-gray-100,
[data-theme="light"] .text-gray-200 {
  color: #0f172a !important; /* Deep rich slate for maximum contrast */
}

/* Ensure colored badges and solid CTA buttons keep crisp white text on light theme */
[data-theme="light"] .bg-indigo-600,
[data-theme="light"] .bg-blue-600,
[data-theme="light"] .bg-amber-600,
[data-theme="light"] .bg-emerald-600,
[data-theme="light"] .bg-cyan-600,
[data-theme="light"] button.bg-indigo-600,
[data-theme="light"] button.bg-cyan-600,
[data-theme="light"] button.bg-blue-600,
[data-theme="light"] button.bg-amber-600,
[data-theme="light"] button.bg-emerald-600,
[data-theme="light"] .bg-indigo-600 *,
[data-theme="light"] .bg-cyan-600 *,
[data-theme="light"] .bg-blue-600 *,
[data-theme="light"] .bg-amber-600 *,
[data-theme="light"] .bg-emerald-600 * {
  color: #ffffff !important;
}

[data-theme="light"] .text-gray-300 {
  color: #334155 !important;
}

[data-theme="light"] .text-blue-300,
[data-theme="light"] .text-blue-300\/90 {
  color: #2563eb !important;
}

[data-theme="light"] .text-gray-400 {
  color: #64748b !important;
}

[data-theme="light"] .text-gray-500 {
  color: #64748b !important;
}

/* Light Mode Card & Container Backgrounds */
[data-theme="light"] .bg-white\/5,
[data-theme="light"] .bg-white\/10 {
  background-color: #f1f5f9 !important;
  border-color: #e2e8f0 !important;
}

[data-theme="light"] .bg-white\/15,
[data-theme="light"] .bg-white\/20 {
  background-color: #e2e8f0 !important;
  border-color: #cbd5e1 !important;
}

[data-theme="light"] .bg-black\/20,
[data-theme="light"] .bg-black\/30,
[data-theme="light"] .bg-black\/40 {
  background-color: #f8fafc !important;
  border-color: #e2e8f0 !important;
}

[data-theme="light"] .bg-\[\#0a0a0f\]\/80,
[data-theme="light"] .bg-\[\#0a0a0f\] {
  background-color: rgba(255, 255, 255, 0.92) !important;
}

[data-theme="light"] .bg-\[\#08080c\],
[data-theme="light"] .bg-\[\#08080d\]\/90,
[data-theme="light"] .bg-\[\#090a12\]\/75,
[data-theme="light"] .bg-\[\#0d0d14\],
[data-theme="light"] .bg-\[\#12121a\],
[data-theme="light"] #about-section {
  background-color: #ffffff !important;
}

/* Light Mode Search Bar Polish */
[data-theme="light"] input#main-search-input {
  background-color: #ffffff !important;
  color: #0f172a !important;
  border-color: #cbd5e1 !important;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05) !important;
}

[data-theme="light"] .group:hover input#main-search-input,
[data-theme="light"] input#main-search-input:hover {
  border-color: #94a3b8 !important;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1) !important;
}

[data-theme="light"] .group:focus-within input#main-search-input,
[data-theme="light"] input#main-search-input:focus {
  border-color: #64748b !important;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1) !important;
}

/* Hero Search Button & Search Controls Mobile Sizing */
#hero-search-btn {
  height: 24px !important;
  min-height: 24px !important;
  max-height: 24px !important;
  padding: 0 9px !important;
  font-size: 10px !important;
  font-weight: 700 !important;
  border-radius: 8px !important;
  right: 6px !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  line-height: 1 !important;
}

#search-clear-btn {
  right: 50px !important;
}

@media (max-width: 639px) {
  #main-search-input,
  #main-search-input::placeholder {
    font-size: 11px !important;
  }
}

@media (min-width: 640px) {
  #hero-search-btn {
    height: 32px !important;
    min-height: 32px !important;
    max-height: 32px !important;
    padding: 0 14px !important;
    font-size: 12px !important;
    border-radius: 12px !important;
    right: 8px !important;
  }

  #search-clear-btn {
    right: 72px !important;
  }
}

[data-theme="light"] .border-white\/5,
[data-theme="light"] .border-white\/10,
[data-theme="light"] .border-white\/15,
[data-theme="light"] .border-white\/20 {
  border-color: #e2e8f0 !important;
}

/* Step 2 & 3 Bootstrap-style Card Components in Light Mode */
[data-theme="light"] #semester-selector-section,
[data-theme="light"] #track-dropdown-section,
[data-theme="light"] #program-level-section {
  background-color: rgba(255, 255, 255, 0.92) !important;
  border-color: #e2e8f0 !important;
  box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05) !important;
}

[data-theme="light"] #track-quick-buttons,
[data-theme="light"] #program-quick-buttons {
  background-color: #f1f5f9 !important;
  border-color: #e2e8f0 !important;
}

[data-theme="light"] .bg-indigo-600\/20 {
  background-color: rgba(99, 102, 241, 0.12) !important;
  color: #4338ca !important;
}
[data-theme="light"] .bg-indigo-600\/20:hover {
  background-color: #4f46e5 !important;
  color: #ffffff !important;
}

[data-theme="light"] .bg-blue-600\/20 {
  background-color: rgba(59, 130, 246, 0.12) !important;
  color: #1d4ed8 !important;
}
[data-theme="light"] .bg-blue-600\/20:hover {
  background-color: #2563eb !important;
  color: #ffffff !important;
}

/* Inputs in Light Mode */
[data-theme="light"] input,
[data-theme="light"] textarea,
[data-theme="light"] select {
  background-color: #ffffff !important;
  color: #0f172a !important;
  border-color: #cbd5e1 !important;
}

[data-theme="light"] input::placeholder,
[data-theme="light"] textarea::placeholder {
  color: #94a3b8 !important;
}

/* Modal and Drawers in Light Mode */
[data-theme="light"] #subject-detail-modal > div,
[data-theme="light"] #search-modal > div,
[data-theme="light"] #bookmarks-drawer > div {
  background-color: #ffffff !important;
  border-color: #e2e8f0 !important;
  color: #0f172a !important;
}

[data-theme="light"] #reader-modal-content {
  background-color: #f8fafc !important;
  color: #0f172a !important;
}

/* Dropdown Option Theme Consistency */
select option {
  background-color: #12131f;
  color: #f8fafc;
}

[data-theme="light"] select option {
  background-color: #ffffff;
  color: #0f172a;
}

[data-theme="minimal"] select option {
  background-color: #121215;
  color: #f4f4f5;
}

/* Response Time & Rendering Optimization: Lazy layout containment for off-screen cards */
#subjects-grid > div {
  content-visibility: auto;
  contain-intrinsic-size: 240px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.3);
  border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(148, 163, 184, 0.5);
}

/* Custom Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* ========================================================
   DEPARTMENT CARD HOVER & INTERACTION ANIMATIONS
   ======================================================== */
.dept-card {
  transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.22s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.22s cubic-bezier(0.16, 1, 0.3, 1),
              background-color 0.22s ease;
  will-change: transform, box-shadow;
  position: relative;
  overflow: hidden;
}

.dept-card:not(.dept-card-selected):hover {
  transform: translateY(-4px) scale(1.02);
  border-color: rgba(99, 102, 241, 0.75);
  box-shadow: 0 12px 24px -6px rgba(99, 102, 241, 0.25), 0 0 16px 2px rgba(99, 102, 241, 0.15);
}

.dept-card:active {
  transform: translateY(-1px) scale(0.99);
}

.dept-card .dept-icon {
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), color 0.2s ease;
}

.dept-card:not(.dept-card-selected):hover .dept-icon {
  transform: scale(1.15) rotate(-3deg);
}

.dept-card .dept-code {
  transition: color 0.2s ease;
}

.dept-card .dept-name {
  transition: color 0.2s ease;
}

/* Selected Department Card */
.dept-card.dept-card-selected {
  transform: translateY(-2px) scale(1.02) !important;
}

/* Department Cards - Milky White in Light Mode (unselected only) */
[data-theme="light"] .dept-card:not(.dept-card-selected):not(.bg-indigo-600) {
  background-color: #ffffff;
  border-color: #e2e8f0;
  box-shadow: 0 2px 8px -2px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .dept-card:not(.dept-card-selected):not(.bg-indigo-600):hover {
  background-color: #ffffff;
  box-shadow: 0 8px 20px -4px rgba(0, 0, 0, 0.08), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
}

.code-font {
  font-family: var(--font-mono);
}

/* Searchable Subject Combobox in Light Mode */
[data-theme="light"] #combobox-trigger {
  background-color: #ffffff !important;
  border-color: #cbd5e1 !important;
  color: #0f172a !important;
}

[data-theme="light"] #combobox-selected-text {
  color: #0f172a !important;
}

[data-theme="light"] #combobox-menu {
  background-color: #ffffff !important;
  border-color: #cbd5e1 !important;
  box-shadow: 0 15px 35px -5px rgba(0, 0, 0, 0.15), 0 5px 15px -3px rgba(0, 0, 0, 0.08) !important;
}

[data-theme="light"] #combobox-search-input {
  background-color: #f8fafc !important;
  border-color: #cbd5e1 !important;
  color: #0f172a !important;
}

[data-theme="light"] .combobox-item {
  color: #334155 !important;
}

[data-theme="light"] .combobox-item:hover {
  background-color: #f1f5f9 !important;
  color: #0f172a !important;
}

/* ========================================================
   MOBILE & TABLET RESPONSIVE OPTIMIZATIONS
   ======================================================== */

/* Global Mobile/Tablet Touch Experience: Instant taps with zero 300ms latency */
* {
  -webkit-tap-highlight-color: transparent;
}

button, a, input, select, textarea {
  touch-action: manipulation;
}

/* Safe Area Insets for Modern Edge-to-Edge Displays & Notches */
body {
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

header {
  padding-top: env(safe-area-inset-top, 0px);
}

/* Horizontal smooth touch scrollers */
.touch-scroll-x {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
  scrollbar-width: none;
  overscroll-behavior-x: contain;
}
.touch-scroll-x::-webkit-scrollbar {
  display: none;
}

/* Vertical smooth touch scroller */
.touch-scroll-y {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-y: contain;
}

/* Fluid Hero Single-Line Heading */
.hero-single-line {
  font-size: clamp(1.05rem, 3.85vw, 3.25rem);
  white-space: nowrap;
  display: inline-block;
  line-height: 1.2;
}

@media (max-width: 480px) {
  /* On narrow phones, allow smooth wrapping to prevent horizontal text clipping */
  .hero-single-line {
    white-space: normal;
    display: block;
    font-size: clamp(1.15rem, 5vw, 1.75rem);
  }
}

/* Tactile mobile feedback on touch devices */
@media (hover: none) and (pointer: coarse) {
  button:active, a:active {
    opacity: 0.9;
  }
}

@media (max-width: 640px) {
  /* Prevent horizontal overflow and body wobble on mobile phones */
  html, body {
    max-width: 100vw;
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
  }

  /* Prevent iOS Safari auto-zoom on input focus while keeping compact selects compact */
  input:not(#main-search-input),
  select:not(#minor-dept-select):not(#mdc-dept-select),
  textarea {
    font-size: 16px !important;
  }

  #minor-dept-select,
  #mdc-dept-select {
    font-size: 12px !important;
    min-height: 32px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  #minor-dept-dropdown-wrapper,
  #mdc-dept-dropdown-wrapper {
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.375rem !important;
  }
  
  /* Standard 42px touch target height for primary interactive buttons & selects */
  select:not(#minor-dept-select):not(#mdc-dept-select),
  button:not(#search-clear-btn):not(#hero-search-btn):not([onclick*="close"]):not([onclick*="clear"]):not(.shrink-0):not(.dept-card):not(#semester-pills-container button):not(#track-pills-bar button):not(#track-scroll-left-btn):not(#track-scroll-right-btn):not(.save-subject-btn) {
    min-height: 42px;
  }

  /* Compact buttons in guided steps & cards */
  #semester-pills-container button,
  #track-pills-bar button,
  #track-scroll-left-btn,
  #track-scroll-right-btn,
  .save-subject-btn {
    min-height: unset !important;
  }
  
  /* Mobile padding optimization */
  .glass-panel {
    padding: 0.85rem !important;
    border-radius: 1rem !important;
  }

  #subject-hero-card {
    padding: 0.75rem 0.85rem !important;
    border-radius: 0.875rem !important;
  }

  /* Modals on small mobile screens */
  #subject-detail-modal > div,
  #search-modal > div {
    max-height: 95vh !important;
    width: 98% !important;
    margin: auto !important;
    border-radius: 1.25rem !important;
  }

  #reader-modal-content {
    padding: 0.75rem !important;
  }

  /* Department cards on small phones - compact minimal styling */
  .dept-card {
    min-height: 54px !important;
    padding: 0.5rem 0.6rem !important;
    border-radius: 0.75rem !important;
  }

  .dept-card .dept-name {
    font-size: 10.5px !important;
    line-height: 1.2 !important;
  }

  /* Bookmarks drawer full width on mobile */
  #bookmarks-drawer > div {
    width: 100% !important;
    max-width: 100% !important;
  }
}

@media (min-width: 641px) and (max-width: 1024px) {
  /* Tablet optimizations (iPad Mini, iPad Air, iPad Pro portrait & landscape) */
  .glass-panel {
    padding: 1rem !important;
  }

  /* Tablet touch targets */
  select:not(#minor-dept-select):not(#mdc-dept-select),
  button:not(#search-clear-btn):not(#hero-search-btn):not([onclick*="close"]):not([onclick*="clear"]):not(.shrink-0):not(.dept-card):not(#semester-pills-container button):not(#track-pills-bar button):not(.save-subject-btn) {
    min-height: 40px;
  }

  .save-subject-btn {
    min-height: unset !important;
  }

  .dept-card {
    min-height: 64px !important;
  }
}

@media (max-width: 1024px) {
  .scrollbar-none::-webkit-scrollbar {
    display: none;
  }
  .scrollbar-none {
    -ms-overflow-style: none;
    scrollbar-width: none;
  }
}

/* ===================================================
   Mobile Navigation 3-Line Dropdown Menu
   =================================================== */
#mobile-dropdown-menu {
  background-color: rgba(14, 16, 23, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 20px 45px -10px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(255, 255, 255, 0.05);
}

[data-theme="light"] #mobile-dropdown-menu {
  background-color: rgba(255, 255, 255, 0.98) !important;
  border: 1px solid rgba(0, 0, 0, 0.12) !important;
  box-shadow: 0 20px 45px -10px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0, 0, 0, 0.05) !important;
}

[data-theme="light"] #mobile-dropdown-menu .mobile-nav-item {
  color: #1e293b !important;
}

[data-theme="light"] #mobile-dropdown-menu .mobile-nav-item span.text-white {
  color: #0f172a !important;
}

[data-theme="light"] #mobile-dropdown-menu .mobile-nav-item:hover {
  background-color: rgba(0, 0, 0, 0.05) !important;
}

[data-theme="light"] #mobile-dropdown-menu .mobile-nav-divider {
  background-color: rgba(0, 0, 0, 0.08) !important;
}

/* ===================================================
   Floating Back to Top Button
   =================================================== */
#back-to-top-btn,
#admin-back-to-top-btn,
#subject-back-to-top-btn {
  will-change: transform, opacity;
  box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.45), 0 8px 10px -6px rgba(99, 102, 241, 0.25);
}

#back-to-top-btn:hover,
#admin-back-to-top-btn:hover,
#subject-back-to-top-btn:hover {
  box-shadow: 0 15px 30px -5px rgba(99, 102, 241, 0.6), 0 10px 12px -5px rgba(99, 102, 241, 0.35);
}

[data-theme="light"] #back-to-top-btn,
[data-theme="light"] #admin-back-to-top-btn,
[data-theme="light"] #subject-back-to-top-btn {
  background-color: #4f46e5 !important;
  color: #ffffff !important;
  border-color: rgba(255, 255, 255, 0.4) !important;
  box-shadow: 0 10px 25px -5px rgba(79, 70, 229, 0.35), 0 8px 10px -6px rgba(79, 70, 229, 0.2) !important;
}

[data-theme="light"] #back-to-top-btn:hover,
[data-theme="light"] #admin-back-to-top-btn:hover,
[data-theme="light"] #subject-back-to-top-btn:hover {
  background-color: #4338ca !important;
  box-shadow: 0 15px 30px -5px rgba(79, 70, 229, 0.5), 0 10px 12px -5px rgba(79, 70, 229, 0.25) !important;
}

/* ===================================================
   DBCM Journal Brand Text - Dark Black
   =================================================== */
.dbcm-journal-text {
  color: #000000 !important;
  font-weight: 700 !important;
}

.group:hover .dbcm-journal-text,
a:hover .dbcm-journal-text {
  color: #2563eb !important;
}

[data-theme="dark"] .dbcm-journal-text {
  color: #ffffff !important;
}

[data-theme="dark"] .group:hover .dbcm-journal-text,
[data-theme="dark"] a:hover .dbcm-journal-text {
  color: #60a5fa !important;
}

/* ===================================================
   Breadcrumbs Interactive Switchers & Dropdowns
   =================================================== */
#subject-breadcrumbs button {
  outline: none;
}

[data-theme="light"] #crumb-dept-menu,
[data-theme="light"] #crumb-sem-menu,
[data-theme="light"] #crumb-code-menu {
  background-color: #ffffff !important;
  border: 1px solid #e2e8f0 !important;
  box-shadow: 0 20px 45px -10px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0, 0, 0, 0.05) !important;
  color: #0f172a !important;
}

[data-theme="light"] #crumb-dept-btn,
[data-theme="light"] #crumb-sem-btn,
[data-theme="light"] #crumb-track-btn,
[data-theme="light"] #crumb-code-btn {
  background-color: #ffffff !important;
  border-color: #e2e8f0 !important;
  color: #0f172a !important;
}

[data-theme="light"] #crumb-dept-btn:hover,
[data-theme="light"] #crumb-sem-btn:hover,
[data-theme="light"] #crumb-track-btn:hover,
[data-theme="light"] #crumb-code-btn:hover {
  background-color: #f8fafc !important;
  color: #4f46e5 !important;
}

[data-theme="light"] #subject-code-pill {
  background-color: #f1f5f9 !important;
  border-color: #e2e8f0 !important;
  color: #0f172a !important;
}

[data-theme="light"] #crumb-dept-list button:not(.bg-indigo-600),
[data-theme="light"] #crumb-sem-list button:not(.bg-indigo-600),
[data-theme="light"] #crumb-code-list button:not(.bg-amber-500) {
  color: #1e293b !important;
}

[data-theme="light"] #crumb-dept-list button:hover:not(.bg-indigo-600),
[data-theme="light"] #crumb-sem-list button:hover:not(.bg-indigo-600),
[data-theme="light"] #crumb-code-list button:hover:not(.bg-amber-500) {
  background-color: #f1f5f9 !important;
}

/* ===================================================
   Full-Page PDF Document Reader
   =================================================== */
#document-reader-modal {
  position: fixed !important;
  inset: 0 !important;
  width: 100% !important;
  width: 100vw !important;
  height: 100% !important;
  height: 100dvh !important;
  max-width: 100vw !important;
  max-height: 100% !important;
  max-height: 100dvh !important;
  margin: 0 !important;
  padding: 0 !important;
  border-radius: 0 !important;
  z-index: 9999 !important;
  flex-direction: column !important;
  overflow: hidden !important;
}

#document-reader-modal.hidden {
  display: none !important;
}

#document-reader-modal:not(.hidden) {
  display: flex !important;
}

#document-reader-modal header {
  width: 100% !important;
  max-width: 100% !important;
  margin: 0 !important;
  border-radius: 0 !important;
  flex-shrink: 0 !important;
}

#reader-modal-body {
  width: 100% !important;
  max-width: 100% !important;
  height: auto !important;
  flex: 1 1 0% !important;
  min-height: 0 !important;
  max-height: 100% !important;
  margin: 0 !important;
  border-radius: 0 !important;
  display: flex !important;
  position: relative !important;
  flex-direction: row !important;
  overflow: hidden !important;
}

#reader-image-preview img {
  width: auto;
  height: auto;
  max-width: min(78%, 1100px);
  max-height: 78%;
  object-fit: contain;
  border-radius: 0.75rem;
  box-shadow: 0 20px 55px rgb(0 0 0 / 35%);
}

@media (max-width: 640px) {
  #reader-image-preview img {
    max-width: 88%;
    max-height: 76%;
  }
}

[data-theme="light"] #document-reader-modal header {
  background-color: #ffffff !important;
  border-bottom: 1px solid #e2e8f0 !important;
}

#reader-ai-drawer {
  height: 100% !important;
  max-height: 100% !important;
  border-top-width: 0 !important;
  border-left-width: 1px !important;
  flex-direction: column !important;
  overflow: hidden !important;
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1), max-width 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

#reader-ai-drawer.hidden {
  display: none !important;
}

#reader-ai-drawer:not(.hidden) {
  display: flex !important;
}

#reader-ai-messages {
  flex: 1 1 0% !important;
  min-height: 0 !important;
  overflow-y: auto !important;
}

/* Default / Small size */
#reader-ai-drawer:not(.drawer-big),
#reader-ai-drawer.drawer-small {
  width: 78vw !important;
  max-width: 340px !important;
}

/* Big / Expanded size */
#reader-ai-drawer.drawer-big {
  width: 100vw !important;
  max-width: 100vw !important;
}

@media (min-width: 768px) {
  #reader-ai-drawer:not(.drawer-big),
  #reader-ai-drawer.drawer-small {
    width: 420px !important;
    max-width: 420px !important;
  }
  #reader-ai-drawer.drawer-big {
    width: 650px !important;
    max-width: 55vw !important;
  }
}

@media (max-width: 767px) {
  #reader-ai-drawer {
    position: absolute !important;
    right: 0 !important;
    top: 0 !important;
    bottom: 0 !important;
    height: 100% !important;
    max-height: 100% !important;
    z-index: 35 !important;
    box-shadow: -6px 0 28px rgba(0, 0, 0, 0.55) !important;
  }
  #reader-ai-backdrop {
    z-index: 30 !important;
  }
}

/* Global AI Drawer sizing */
#global-ai-drawer {
  height: 100% !important;
  height: 100dvh !important;
}
#global-ai-drawer.hidden {
  display: none !important;
}
#global-ai-drawer:not(.hidden) {
  display: flex !important;
}
#global-ai-drawer > div {
  height: 100% !important;
  height: 100dvh !important;
  max-height: 100% !important;
  max-height: 100dvh !important;
  display: flex !important;
  flex-direction: column !important;
  overflow: hidden !important;
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1), max-width 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
}
#global-ai-messages {
  flex: 1 1 0% !important;
  min-height: 0 !important;
  overflow-y: auto !important;
}
.global-drawer-small {
  width: 100% !important;
  max-width: 30rem !important;
}
.global-drawer-big {
  width: 100% !important;
  max-width: 45rem !important;
}
@media (max-width: 640px) {
  .global-drawer-small {
    width: 82vw !important;
    max-width: 350px !important;
  }
  .global-drawer-big {
    width: 100vw !important;
    max-width: 100vw !important;
  }
}

[data-theme="light"] #reader-ai-drawer {
  background-color: #ffffff !important;
  border-left-color: #e2e8f0 !important;
}

[data-theme="light"] #global-ai-drawer > div {
  background-color: #ffffff !important;
  border-left-color: #e2e8f0 !important;
}

.no-scrollbar::-webkit-scrollbar {
  display: none;
}
.no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

/* ===================================================
   Custom AI Pill Button (Soft Periwinkle Lavender)
   =================================================== */
.ai-pill-btn {
  background: #6c6ae9 !important;
  color: #ffffff !important;
  border-radius: 9999px !important;
  box-shadow: 0 6px 20px -2px rgba(108, 106, 233, 0.42), 0 2px 6px -1px rgba(108, 106, 233, 0.25) !important;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1) !important;
  border: none !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  user-select: none !important;
  -webkit-user-select: none !important;
}

.ai-pill-btn:hover {
  filter: brightness(1.06) !important;
  box-shadow: 0 10px 26px -2px rgba(108, 106, 233, 0.58), 0 4px 10px -2px rgba(108, 106, 233, 0.35) !important;
  transform: translateY(-1px) scale(1.02) !important;
}

.ai-pill-btn:active {
  transform: translateY(0px) scale(0.96) !important;
  filter: brightness(0.98) !important;
}

/* ===================================================
   Floating AI Tutor Widget & Mobile Docking
   =================================================== */
/*#dbcm-floating-ai-btn-container {
  position: fixed !important;
  z-index: 45 !important;
  bottom: calc(1rem + env(safe-area-inset-bottom, 0px)) !important;
  right: 1rem !important;
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
  will-change: transform;
}

@media (min-width: 640px) {
  #dbcm-floating-ai-btn-container {
    bottom: 1.75rem !important;
    right: 1.75rem !important;
  }
}

#subject-back-to-top-btn,
#back-to-top-btn {
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
}