/* ==========================================================================
   Expert Guru — Design System & Stylesheet
   Modern, Premium, Production-Grade SaaS UI
   Inspired by Linear, Stripe, Framer, Vercel
   ========================================================================== */

/* ---------------- 1. DESIGN TOKENS ---------------- */
:root {
  /* Brand Primary (Refined Royal Indigo / Violet) */
  --eg-primary: #4f46e5;
  --eg-primary-hover: #4338ca;
  --eg-primary-dark: #3730a3;
  --eg-primary-light: #6366f1;
  --eg-primary-tint: #eef2ff;
  --eg-primary-tint-strong: #e0e7ff;
  --eg-primary-border: #c7d2fe;

  /* Accent & Warm Highlights (Refined Amber / Honey Gold) */
  --eg-accent: #f59e0b;
  --eg-accent-hover: #d97706;
  --eg-accent-dark: #b45309;
  --eg-accent-tint: #fffbeb;
  --eg-accent-border: #fde68a;

  /* Secondary & Informational (Vibrant Sky) */
  --eg-secondary: #0284c7;
  --eg-secondary-hover: #0369a1;
  --eg-secondary-tint: #f0f9ff;
  --eg-secondary-border: #bae6fd;

  /* Functional Status */
  --eg-success: #10b981;
  --eg-success-hover: #059669;
  --eg-success-tint: #ecfdf5;
  --eg-success-border: #a7f3d0;
  --eg-error: #f43f5e;
  --eg-error-tint: #fff1f2;
  --eg-error-border: #fecdd3;
  --eg-warning: #f59e0b;

  /* Slate Neutral Scale */
  --neutral-0: #ffffff;
  --neutral-50: #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-150: #e8eef5;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-400: #94a3b8;
  --neutral-500: #64748b;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;
  --neutral-950: #020617;

  /* Semantic Aliases */
  --eg-paper: var(--neutral-0);
  --eg-dark: var(--neutral-900);
  --eg-dark-surface: var(--neutral-950);
  --eg-muted: var(--neutral-500);
  --eg-subtle: var(--neutral-600);
  --eg-line: var(--neutral-200);
  --eg-line-subtle: var(--neutral-150);
  --eg-line-strong: var(--neutral-300);
  --eg-tint: var(--neutral-50);
  --eg-tint-strong: var(--neutral-100);

  /* Subject Themes (Balanced, Premium HSL values) */
  --subj-maths: #4f46e5;
  --subj-maths-tint: #eef2ff;
  --subj-maths-border: #c7d2fe;

  --subj-english: #0284c7;
  --subj-english-tint: #f0f9ff;
  --subj-english-border: #bae6fd;

  --subj-hindi: #d97706;
  --subj-hindi-tint: #fffbeb;
  --subj-hindi-border: #fde68a;

  --subj-science: #0d9488;
  --subj-science-tint: #f0fdfa;
  --subj-science-border: #99f6e4;

  --subj-evs: #e11d48;
  --subj-evs-tint: #fff1f2;
  --subj-evs-border: #fecdd3;

  /* Typography Stack */
  --font-head: 'Plus Jakarta Sans', 'Poppins', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-hindi: 'Noto Sans Devanagari', 'Baloo 2', system-ui, sans-serif;

  /* Elevation Shadows (Stripe / Linear multi-layer quality) */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.07), 0 1px 2px -1px rgba(15, 23, 42, 0.05);
  --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.04), 0 8px 24px -6px rgba(15, 23, 42, 0.05);
  --shadow-soft: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 12px 30px -4px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 6px 16px -2px rgba(15, 23, 42, 0.08), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 14px 28px -4px rgba(15, 23, 42, 0.1), 0 6px 12px -2px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 24px 48px -12px rgba(15, 23, 42, 0.18), 0 8px 16px -4px rgba(15, 23, 42, 0.08);
  --shadow-lifted: 0 20px 40px -12px rgba(79, 70, 229, 0.22);
  --shadow-btn: 0 1px 2px rgba(0, 0, 0, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.25);
  --shadow-dropdown: 0 12px 36px -6px rgba(15, 23, 42, 0.14), 0 0 0 1px rgba(15, 23, 42, 0.06);

  /* Border Radii */
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 22px;
  --radius-2xl: 30px;
  --radius-full: 9999px;

  /* Layout */
  --maxw: 1200px;
  --header-height: 68px;

  /* Animation & Transitions */
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 150ms var(--ease-spring);
  --transition-base: 220ms var(--ease-spring);
  --transition-slow: 350ms var(--ease-spring);

  /* Subtle Modern Gradients */
  --grad-primary: linear-gradient(135deg, #6366f1 0%, #4f46e5 50%, #4338ca 100%);
  --grad-warm: linear-gradient(135deg, #fbbf24 0%, #f59e0b 60%, #d97706 100%);
  --grad-hero-overlay: linear-gradient(180deg, rgba(15, 23, 42, 0.72) 0%, rgba(15, 23, 42, 0.85) 60%, rgba(2, 6, 23, 0.94) 100%);
  --grad-glow: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.15), transparent 70%);
}

/* ---------------- 2. RESET & FOUNDATIONS ---------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--neutral-800);
  background-color: var(--eg-paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection {
  background-color: var(--eg-primary-tint-strong);
  color: var(--eg-primary-dark);
}

:lang(hi), .hi {
  font-family: var(--font-hindi);
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6, .font-head {
  font-family: var(--font-head);
  color: var(--neutral-900);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.025em;
}

h1 { font-size: clamp(2.25rem, 4.5vw, 3.5rem); letter-spacing: -0.035em; font-weight: 800; line-height: 1.15; }
h2 { font-size: clamp(1.75rem, 3vw, 2.35rem); letter-spacing: -0.03em; font-weight: 700; line-height: 1.2; }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); letter-spacing: -0.02em; font-weight: 700; line-height: 1.3; }
h4 { font-size: 1.125rem; letter-spacing: -0.015em; font-weight: 600; }

.h-xl {
  font-size: clamp(2.25rem, 4.2vw, 3.25rem);
  letter-spacing: -0.035em;
  font-weight: 800;
  margin: 16px 0;
  line-height: 1.15;
}

.h-lg {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  letter-spacing: -0.025em;
  font-weight: 700;
  margin: 12px 0 16px;
  line-height: 1.22;
}

.lead {
  font-size: 1.125rem;
  color: var(--neutral-600);
  max-width: 62ch;
  line-height: 1.65;
  font-weight: 400;
}

a {
  color: var(--eg-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--eg-primary-hover);
  text-decoration: none;
}

p {
  margin: 0 0 14px;
}

p:last-child {
  margin-bottom: 0;
}

img, svg, video {
  max-width: 100%;
  display: block;
}

/* Accessibility Focus Rings */
:focus-visible {
  outline: 2px solid var(--eg-primary);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  top: -999px;
  left: 16px;
  background: var(--eg-primary);
  color: #fff;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  z-index: 9999;
  font-weight: 600;
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 16px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------------- 3. LAYOUT & CONTAINERS ---------------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: 80px 0;
  position: relative;
}

.section-tight {
  padding: 48px 0;
  position: relative;
}

.bg-tint {
  background-color: var(--neutral-50);
  border-top: 1px solid var(--eg-line-subtle);
  border-bottom: 1px solid var(--eg-line-subtle);
}

.bg-dark {
  background-color: var(--neutral-900);
  color: var(--neutral-200);
}

.bg-dark h1, .bg-dark h2, .bg-dark h3, .bg-dark h4 {
  color: #ffffff;
}

.bg-dark a {
  color: #ffffff;
}

.band-primary {
  background: var(--grad-primary);
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.band-primary h1, .band-primary h2, .band-primary h3, .band-primary h4 {
  color: #ffffff;
}

.band-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  opacity: 0.6;
}

.band-primary .container {
  position: relative;
  z-index: 2;
}

/* Subtle Wave Edges Replacement (Crisp, Modern Transition) */
.wave-edge {
  display: none; /* Replaced with crisp edge dividers for high-end SaaS feel */
}

/* Eyebrow Pill Badges */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.075em;
  text-transform: uppercase;
  color: var(--eg-primary);
  background: var(--eg-primary-tint);
  border: 1px solid var(--eg-primary-border);
  padding: 5px 13px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.eyebrow-on-dark {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.22);
  color: #ffffff;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* ---------------- 4. BUTTONS & BADGES ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14.5px;
  line-height: 1;
  padding: 12px 22px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  transition: all var(--transition-fast);
}

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

.btn-primary {
  background-color: var(--eg-primary);
  color: #ffffff !important;
  box-shadow: var(--shadow-btn), var(--shadow-sm);
  border-color: rgba(0, 0, 0, 0.08);
}

.btn-primary:hover {
  background-color: var(--eg-primary-hover);
  box-shadow: var(--shadow-btn), var(--shadow-md);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: #ffffff;
  color: var(--neutral-800) !important;
  border-color: var(--neutral-300);
  box-shadow: var(--shadow-xs);
}

.btn-outline:hover {
  background-color: var(--neutral-50);
  border-color: var(--neutral-400);
  color: var(--neutral-900) !important;
}

.btn-accent {
  background: var(--grad-warm);
  color: #2e1700 !important;
  font-weight: 700;
  box-shadow: 0 1px 3px rgba(245, 158, 11, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.btn-accent:hover {
  filter: brightness(1.05);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
  transform: translateY(-1px);
}

.btn-ghost {
  background-color: transparent;
  color: var(--neutral-700) !important;
  border-color: transparent;
}

.btn-ghost:hover {
  background-color: var(--neutral-100);
  color: var(--neutral-900) !important;
}

.btn-outline-light {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.75);
  color: #ffffff !important;
  transform: translateY(-1px);
}

.bg-dark .btn-outline {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff !important;
  border-color: rgba(255, 255, 255, 0.45);
}

.bg-dark .btn-outline:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.75);
  color: #ffffff !important;
  transform: translateY(-1px);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 13px;
  border-radius: var(--radius-sm);
  min-height: 34px;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
  border-radius: var(--radius-lg);
  min-height: 48px;
}

.btn-block {
  width: 100%;
}

/* FREE Badge Pills */
.pill-free {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--eg-accent-tint);
  color: #92400e;
  border: 1px solid var(--eg-accent-border);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: var(--radius-full);
}

.ribbon-free {
  position: absolute;
  top: 14px;
  right: 14px;
  background: var(--eg-accent-tint);
  color: #92400e;
  border: 1px solid var(--eg-accent-border);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.04em;
  padding: 3px 9px;
  border-radius: var(--radius-full);
  z-index: 2;
}

.ribbon-free::after {
  display: none;
}

/* ---------------- 5. SITE HEADER & NAVIGATION ---------------- */
.announce {
  background-color: var(--neutral-900);
  color: var(--neutral-200);
  font-size: 13px;
  text-align: center;
  padding: 8px 16px;
  position: relative;
  z-index: 60;
  border-bottom: 1px solid var(--neutral-800);
}

.announce a {
  color: #ffffff;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.announce a:hover {
  color: var(--eg-accent);
}

.announce .close-announce {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--neutral-400);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  padding: 6px;
  border-radius: var(--radius-xs);
  transition: color var(--transition-fast);
}

.announce .close-announce:hover {
  color: #ffffff;
}

header.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--eg-line);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: var(--header-height);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex: none;
}

.logo-img {
  height: 44px;
  width: auto;
  display: block;
}

.logo-footer .logo-img {
  height: 52px;
}

nav.main-nav {
  display: flex;
  align-items: center;
}

nav.main-nav > ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
}

nav.main-nav > ul > li {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 14px;
  color: var(--neutral-700);
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover, .nav-link[aria-expanded="true"] {
  color: var(--neutral-900);
  background-color: var(--neutral-100);
}

.nav-link[aria-current="page"] {
  color: var(--eg-primary);
  font-weight: 600;
}

.caret {
  width: 7px;
  height: 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--transition-fast);
  margin-top: -3px;
  opacity: 0.65;
}

.nav-link[aria-expanded="true"] .caret {
  transform: rotate(-135deg);
  margin-top: 3px;
}

/* Mega Menus */
.mega {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  background: #ffffff;
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-dropdown);
  padding: 20px;
  display: none;
  min-width: 540px;
  animation: fadeInDown 180ms var(--ease-spring);
}

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

.mega.open {
  display: block;
}

.mega-grid {
  display: grid;
  gap: 20px;
}

.mega-cols-2 {
  grid-template-columns: 1.3fr 1fr;
}

.mega-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--neutral-400);
  margin-bottom: 10px;
}

.mega-classgrid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.mega-classgrid a {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 4px;
  border-radius: var(--radius-sm);
  background: var(--neutral-50);
  border: 1px solid var(--eg-line);
  font-weight: 600;
  font-size: 13px;
  color: var(--neutral-800);
  transition: all var(--transition-fast);
}

.mega-classgrid a:hover {
  background: var(--eg-primary-tint);
  border-color: var(--eg-primary-border);
  color: var(--eg-primary);
}

.mega-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.mega-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 10px;
  border-radius: var(--radius-xs);
  font-size: 13.5px;
  color: var(--neutral-700);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.mega-list a:hover {
  background: var(--neutral-100);
  color: var(--neutral-900);
  padding-left: 12px;
}

.mega-promo {
  background: var(--neutral-50);
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

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

.hamburger {
  display: none;
  background: #ffffff;
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-sm);
  width: 40px;
  height: 40px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  padding: 8px;
}

.hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background-color: var(--neutral-800);
  margin: 3.5px auto;
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* Mobile Nav Drawer */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
}

.mobile-nav.open {
  display: block;
}

.mobile-nav .scrim {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: fadeIn 200ms ease;
}

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

.mobile-nav .panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(85vw, 360px);
  height: 100%;
  background: #ffffff;
  overflow-y: auto;
  padding: 24px;
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  animation: slideInRight 220ms var(--ease-spring);
}

@keyframes slideInRight {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}

.mobile-nav details {
  border-bottom: 1px solid var(--eg-line);
  padding: 10px 0;
}

.mobile-nav summary {
  font-weight: 600;
  font-size: 15px;
  padding: 6px 4px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  color: var(--neutral-800);
}

.mobile-nav summary::-webkit-details-marker {
  display: none;
}

.mobile-nav ul {
  list-style: none;
  margin: 6px 0 6px;
  padding-left: 10px;
}

.mobile-nav ul li a {
  display: block;
  padding: 8px 6px;
  color: var(--neutral-600);
  font-size: 14px;
  font-weight: 500;
}

.mobile-nav .mn-top > a {
  display: block;
  padding: 14px 4px;
  font-weight: 600;
  font-size: 15px;
  color: var(--neutral-800);
  border-bottom: 1px solid var(--eg-line);
}

/* ---------------- 5b. BREADCRUMBS ---------------- */
.breadcrumbs {
  padding: 12px 0 6px;
  background-color: transparent;
  font-size: 13px;
  line-height: 1.4;
  position: relative;
  z-index: 10;
  width: 100%;
}

.breadcrumbs .container {
  display: flex !important;
  align-items: center !important;
  width: 100% !important;
}

.breadcrumbs-list {
  display: flex !important;
  flex-wrap: wrap !important;
  align-items: center !important;
  list-style: none !important;
  list-style-type: none !important;
  margin: 0 !important;
  padding: 0 !important;
  gap: 4px 0;
}

.breadcrumbs-item {
  display: inline-flex !important;
  align-items: center !important;
  list-style: none !important;
  list-style-type: none !important;
  color: var(--neutral-500);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
}

.breadcrumbs-item a {
  color: var(--neutral-500);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: color var(--transition-fast);
  padding: 2px 0;
}

.breadcrumbs-item a:hover {
  color: var(--eg-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.breadcrumbs-sep {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  margin: 0 7px;
  color: var(--neutral-400);
  user-select: none;
  line-height: 1;
}

.breadcrumbs-sep svg {
  display: block;
  width: 9px;
  height: 9px;
  opacity: 0.65;
}

.breadcrumbs-item.current span,
.breadcrumbs-item[aria-current="page"] span {
  color: var(--neutral-700);
  font-weight: 600;
  display: inline-block;
}

@media (max-width: 640px) {
  .breadcrumbs {
    padding: 10px 0 4px;
    font-size: 12px;
  }

  .breadcrumbs-item {
    font-size: 12px;
  }

  .breadcrumbs-sep {
    margin: 0 5px !important;
  }

  .breadcrumbs-sep svg {
    width: 8px;
    height: 8px;
  }

  .breadcrumbs-item.current span {
    max-width: 200px !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
  }
}

/* ---------------- 6. HERO SECTIONS ---------------- */
/* Video Hero Section */
.hero-video-section {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #ffffff;
  background-color: var(--neutral-950);
}

.hero-video-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  z-index: 0;
  opacity: 0.65;
}

.hero-video-overlay {
  position: absolute;
  inset: 0;
  background: var(--grad-hero-overlay);
  z-index: 1;
}

.hero-video-content {
  position: relative;
  z-index: 2;
  padding: 88px 0 56px;
  max-width: 820px;
}

.hero-video-content .lead {
  color: var(--neutral-300);
  font-size: 1.2rem;
  line-height: 1.65;
}

.hero-video-content .h-xl {
  color: #ffffff;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.watch-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: none;
  border: none;
  color: #ffffff;
  font-weight: 600;
  font-size: 14.5px;
  cursor: pointer;
  margin-top: 24px;
  padding: 0;
  font-family: var(--font-body);
  transition: opacity var(--transition-fast);
}

.watch-link:hover {
  opacity: 0.85;
}

.watch-ico {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
  font-size: 12px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  transition: transform var(--transition-fast);
}

.watch-link:hover .watch-ico {
  transform: scale(1.08);
  border-color: #ffffff;
}

/* Formula Highlights Row */
.formula-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 40px;
  flex-wrap: wrap;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  width: fit-content;
}

.formula-item {
  display: flex;
  flex-direction: column;
}

.formula-item strong {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.1;
}

.formula-item span {
  font-size: 12px;
  color: var(--neutral-300);
}

.formula-item.formula-result strong {
  color: var(--eg-accent);
}

.formula-op {
  font-size: 18px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.45);
}

/* Standard Editorial Hero */
.hero {
  padding: 56px 0 64px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-art {
  aspect-ratio: 1/1;
  border-radius: var(--radius-2xl);
  background: var(--neutral-50);
  border: 1px solid var(--eg-line);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-card);
}

.photo-frame {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--eg-line);
  background: var(--neutral-100);
}

.photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.float-badge {
  position: absolute;
  background: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--eg-line);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 13.5px;
  color: var(--neutral-900);
  z-index: 2;
}

.float-badge .ico-circle {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex: none;
}

.float-badge.fb-top { top: 20px; left: -16px; }
.float-badge.fb-bottom { bottom: 20px; right: -16px; }

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
  z-index: 0;
  pointer-events: none;
}

.blob-1 {
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.25), transparent 70%);
  top: -100px;
  right: -80px;
}

.blob-2 {
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(2, 132, 199, 0.2), transparent 70%);
  bottom: -80px;
  left: -60px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  background: #ffffff;
  border: 1px solid var(--eg-line);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-xs);
  color: var(--neutral-700);
}

.chip::before {
  content: '✓';
  color: var(--eg-success);
  font-weight: 800;
  font-size: 12px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 28px;
}

/* ---------------- 7. CARDS & GRIDS ---------------- */
.grid {
  display: grid;
  gap: 24px;
}

.grid-5 { grid-template-columns: repeat(5, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #ffffff;
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  position: relative;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.card:hover {
  border-color: var(--neutral-300);
  box-shadow: var(--shadow-soft);
}

.card-link {
  display: flex;
  flex-direction: column;
  color: inherit;
  text-decoration: none;
}

.card-link:hover {
  text-decoration: none;
  transform: translateY(-2px);
}

/* Modern Subject Cards */
.subject-card {
  position: relative;
  overflow: hidden;
  background: #ffffff;
  display: flex;
  flex-direction: column;
}

.subject-card .glyph {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.subject-card:hover .glyph {
  transform: scale(1.05);
}

.subject-card.c-maths .glyph { background: var(--subj-maths); }
.subject-card.c-english .glyph { background: var(--subj-english); }
.subject-card.c-hindi .glyph { background: var(--subj-hindi); }
.subject-card.c-science .glyph { background: var(--subj-science); }
.subject-card.c-evs .glyph { background: var(--subj-evs); }

.tag-class {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--neutral-500);
  margin-bottom: 8px;
}

/* Free Library Cards */
.lib-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.lib-card h3 {
  color: var(--neutral-900);
  transition: color var(--transition-fast);
}

.lib-card:hover h3 {
  color: var(--eg-primary);
}

.res-types {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.res-types span {
  font-size: 11.5px;
  background: var(--neutral-100);
  color: var(--neutral-700);
  border: 1px solid var(--eg-line);
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  font-weight: 600;
}

/* Step Cards */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step-card {
  padding: 24px;
  background: #ffffff;
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-lg);
}

.step-card .step-num {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  color: var(--eg-primary);
  background: var(--eg-primary-tint);
  border: 1px solid var(--eg-primary-border);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.band-primary .step-card {
  background: rgba(255, 255, 255, 0.96);
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 12px 28px -4px rgba(15, 23, 42, 0.2);
}

.band-primary .step-card h3 {
  color: var(--neutral-900);
}

/* Trust Stats */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
  text-align: center;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: #ffffff;
  border: 1px solid var(--eg-line);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
  font-size: 20px;
}

.stat-num {
  font-family: var(--font-head);
  font-size: 36px;
  font-weight: 800;
  color: var(--neutral-900);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 13.5px;
  color: var(--neutral-500);
  margin-top: 4px;
  font-weight: 500;
}

/* ---------------- 8. TABS & SEGMENTED CONTROLS ---------------- */
.tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--eg-line);
  margin-bottom: 24px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-btn {
  background: none;
  border: none;
  padding: 10px 16px;
  font-weight: 600;
  font-size: 14.5px;
  color: var(--neutral-500);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  font-family: var(--font-body);
  transition: all var(--transition-fast);
  white-space: nowrap;
  min-height: 44px;
}

.tab-btn:hover {
  color: var(--neutral-900);
}

.tab-btn[aria-selected="true"] {
  color: var(--eg-primary);
  border-bottom-color: var(--eg-primary);
  font-weight: 700;
}

.tabpanel[hidden] {
  display: none !important;
}

/* ---------------- 9. PRICING CARDS ---------------- */
.price-card {
  text-align: left;
  border: 1px solid var(--eg-line);
  padding: 32px 28px;
  border-radius: var(--radius-xl);
  background: #ffffff;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.price-card.featured {
  border-color: var(--eg-primary);
  box-shadow: 0 0 0 1px var(--eg-primary), var(--shadow-lg);
  position: relative;
  background: #ffffff;
}

.price-card.featured .eyebrow {
  margin-bottom: 10px;
}

.price-amount {
  font-family: var(--font-head);
  font-size: 28px;
  font-weight: 800;
  color: var(--neutral-900);
  margin: 12px 0 18px;
  letter-spacing: -0.02em;
}

.price-amount .illustrative {
  font-size: 12px;
  font-weight: 600;
  color: var(--neutral-500);
  display: block;
  margin-top: 4px;
}

.price-feats {
  list-style: none;
  padding: 0;
  margin: 16px 0 28px;
}

.price-feats li {
  padding: 8px 0;
  border-bottom: 1px solid var(--neutral-100);
  font-size: 14px;
  color: var(--neutral-700);
  display: flex;
  align-items: center;
  gap: 10px;
}

.price-feats li::before {
  content: '✓';
  color: var(--eg-success);
  font-weight: 800;
  font-size: 13px;
  flex: none;
}

/* Contact Channel Cards */
.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
  max-width: 440px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: #ffffff;
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xs);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-fast);
}

.contact-card:hover {
  border-color: var(--eg-primary-border);
  background: var(--eg-primary-tint);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}

.contact-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--neutral-100);
  color: var(--eg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
  transition: all var(--transition-fast);
}

.contact-card:hover .contact-icon {
  background: var(--eg-primary);
  color: #ffffff;
}

/* ---------------- 10. FORMS & VALIDATION ---------------- */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 6px;
  min-width: 0;
}

.field label {
  font-weight: 600;
  font-size: 13px;
  color: var(--neutral-800);
}

.field .req {
  color: var(--eg-error);
}

.field input, .field select, .field textarea, .ws-card input, .ws-card textarea, .lib-toolbar input, .lib-toolbar select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  font-family: var(--font-body);
  color: var(--neutral-900);
  background-color: #ffffff;
  box-shadow: var(--shadow-xs);
  min-height: 42px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.field input:focus, .field select:focus, .field textarea:focus, .lib-toolbar input:focus, .lib-toolbar select:focus {
  outline: none;
  border-color: var(--eg-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15), var(--shadow-xs);
}

.field input:invalid.touched, .field select:invalid.touched, .field textarea:invalid.touched {
  border-color: var(--eg-error);
  box-shadow: 0 0 0 3px rgba(244, 63, 94, 0.15);
}

.field .err {
  font-size: 12px;
  color: var(--eg-error);
  min-height: 16px;
  font-weight: 500;
}

.phone-row {
  display: flex;
  gap: 8px;
  min-width: 0;
}

.phone-row select {
  flex: 0 0 95px;
  min-width: 0;
}

.phone-row input {
  flex: 1 1 auto;
  min-width: 0;
}

.check-row {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 13px;
  color: var(--neutral-600);
  cursor: pointer;
  margin: 10px 0 16px;
}

.check-row input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--eg-primary);
  margin-top: 3px;
  flex: none;
}

.form-success {
  background: var(--eg-success-tint);
  border: 1px solid var(--eg-success-border);
  color: #065f46;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 14px;
  display: none;
  margin-top: 16px;
  animation: fadeIn 200ms ease;
}

.form-success.show {
  display: block;
}

.form-card {
  max-width: 620px;
  margin: 0 auto;
  padding: 32px;
  border-radius: var(--radius-xl);
}

/* ---------------- 11. MODAL DIALOGS ---------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 120;
  padding: 20px;
  animation: fadeIn 150ms ease;
}

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

.modal-box {
  background: #ffffff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--eg-line);
  box-shadow: var(--shadow-xl);
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 32px;
  position: relative;
  animation: scaleUp 200ms var(--ease-spring);
}

@keyframes scaleUp {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  background: var(--neutral-100);
  border: none;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: 16px;
  color: var(--neutral-600);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--neutral-200);
  color: var(--neutral-900);
}

/* ---------------- 12. APP SHOWCASE & DEVICES ---------------- */
.appcard {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 36px;
  align-items: center;
  background: var(--neutral-50);
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-xl);
  padding: 36px;
}

.appcard-full {
  display: block;
  padding: 28px;
}

.appcard-full .appcard-info {
  margin-top: 28px;
  max-width: 680px;
}

.appcard-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 20px;
  padding: 16px;
  background: #ffffff;
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-md);
}

.appcard-stats strong {
  display: block;
  font-size: 16px;
  color: var(--neutral-900);
  font-weight: 700;
}

.appcard-stats span {
  font-size: 12px;
  color: var(--neutral-500);
}

.play-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--neutral-900);
  color: #ffffff !important;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 13.5px;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
  margin-top: 14px;
}

.play-badge:hover {
  background: var(--neutral-800);
  transform: translateY(-1px);
}

.video-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: #000000;
}

.video-frame video {
  width: 100%;
  display: block;
  object-fit: cover;
}

.video-caption {
  font-size: 12.5px;
  color: var(--neutral-500);
  margin-top: 10px;
  text-align: center;
}

.topic-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.topic-thumb {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--eg-line);
  aspect-ratio: 16/9;
}

.topic-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.topic-thumb .topic-label {
  position: absolute;
  left: 12px;
  bottom: 12px;
  background: rgba(15, 23, 42, 0.75);
  color: #ffffff;
  font-size: 12.5px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

/* Device Mockups Artwork */
.phone-shell {
  width: 230px;
  background: #ffffff;
  border-radius: 34px;
  padding: 10px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--eg-line);
  flex: none;
}

.phone-screen {
  background: #ffffff;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--eg-line);
}

.tablet-shell {
  width: 360px;
  background: #ffffff;
  border-radius: 22px;
  padding: 12px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--eg-line);
  flex: none;
}

.tablet-screen {
  background: #ffffff;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--eg-line);
}

.mock-header {
  background: var(--eg-primary);
  padding: 12px 14px 18px;
  position: relative;
  color: #ffffff;
}

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

.mock-wave {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  line-height: 0;
}

.mock-wave svg {
  width: 100%;
  height: 14px;
  display: block;
}

.mock-subject-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 14px;
}

.mock-tile {
  aspect-ratio: 1;
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: #ffffff;
  font-size: 9px;
  font-weight: 800;
}

.mock-navbar {
  display: flex;
  justify-content: space-around;
  padding: 10px 4px;
  border-top: 1px solid var(--eg-line);
}

.mock-navitem {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  font-size: 8px;
  font-weight: 700;
  color: var(--neutral-400);
}

.mock-navitem.active {
  color: var(--eg-primary);
}

.mock-greeting {
  padding: 16px 18px 6px;
}

.mock-chips {
  display: flex;
  gap: 6px;
  padding: 0 18px 12px;
  flex-wrap: wrap;
}

.mock-chip {
  font-size: 10px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.mock-chart {
  padding: 4px 18px 20px;
  display: flex;
  align-items: flex-end;
  gap: 10px;
  height: 90px;
}

.mock-chart .bar {
  flex: 1;
  border-radius: 4px 4px 0 0;
  background: var(--neutral-200);
  position: relative;
}

.mock-chart .bar span {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  font-size: 8px;
  color: var(--neutral-500);
  margin-bottom: 2px;
}

/* ---------------- 13. INTERACTIVE QUIZ & GAME ENGINE ---------------- */
.game-box, .quiz-box {
  background: #ffffff;
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.level-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 18px 0 24px;
}

.level-btn {
  flex: 1;
  min-width: 200px;
  background: var(--neutral-50);
  border: 1.5px solid var(--eg-line);
  border-radius: var(--radius-md);
  padding: 16px;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-body);
  transition: all var(--transition-fast);
}

.level-btn:hover {
  background: #ffffff;
  border-color: var(--neutral-300);
}

.level-btn[aria-pressed="true"] {
  border-color: var(--eg-primary);
  background: var(--eg-primary-tint);
  box-shadow: 0 0 0 1px var(--eg-primary);
}

.q-progress {
  font-size: 12.5px;
  color: var(--neutral-500);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.q-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--neutral-900);
  margin-bottom: 20px;
  line-height: 1.4;
}

.q-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.q-opt {
  background: #ffffff;
  border: 1.5px solid var(--eg-line);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--neutral-800);
  cursor: pointer;
  font-family: var(--font-body);
  text-align: left;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-xs);
}

.q-opt:hover:not(:disabled) {
  border-color: var(--neutral-400);
  background: var(--neutral-50);
}

.q-opt.selected {
  border-color: var(--eg-primary);
  background: var(--eg-primary-tint);
  box-shadow: 0 0 0 1px var(--eg-primary);
  color: var(--eg-primary-dark);
}

.q-opt.correct {
  border-color: var(--eg-success);
  background: var(--eg-success-tint);
  color: #065f46;
  box-shadow: 0 0 0 1px var(--eg-success);
}

.q-opt.wrong {
  border-color: var(--eg-error);
  background: var(--eg-error-tint);
  color: #9f1239;
  box-shadow: 0 0 0 1px var(--eg-error);
}

.q-feedback {
  margin-top: 16px;
  font-weight: 700;
  font-size: 15px;
  min-height: 24px;
}

.q-explain {
  font-size: 14px;
  color: var(--neutral-600);
  margin-top: 6px;
}

.score-box {
  text-align: center;
  padding: 24px 0;
}

.score-num {
  font-family: var(--font-head);
  font-size: 48px;
  font-weight: 800;
  color: var(--eg-primary);
  line-height: 1;
  margin-bottom: 6px;
}

.quiz-end-extra {
  text-align: left;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--eg-line);
}

.quiz-end-extra h4 {
  font-size: 14px;
  margin-bottom: 10px;
}

.review-list {
  display: none;
  margin-top: 20px;
  text-align: left;
}

.review-list.shown {
  display: block;
}

.review-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--eg-line);
  font-size: 14px;
}

.review-item .ri-wrong { color: var(--eg-error); font-weight: 600; }
.review-item .ri-right { color: var(--eg-success); font-weight: 600; }

/* ---------------- 14. CLASS 2 CURRICULUM & LESSON PLAYER ---------------- */
.lesson-head {
  padding: 24px 0 12px;
}

.lesson-head-row {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.lesson-head-text {
  flex: 1;
  min-width: 240px;
}

.lesson-head h1 {
  font-size: clamp(24px, 4vw, 32px);
  margin: 4px 0 6px;
}

.lesson-hook {
  font-size: 15.5px;
  font-style: italic;
  color: var(--eg-primary);
  margin: 0 0 8px;
}

.lesson-meta {
  font-size: 13px;
  color: var(--neutral-500);
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.lesson-visual {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.learn-section {
  margin-bottom: 32px;
}

.learn-section h2 {
  font-size: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.learn-section h2 .sec-badge {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--eg-primary-tint);
  color: var(--eg-primary);
  border: 1px solid var(--eg-primary-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 800;
  flex: none;
}

.goal-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.goal-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 15px;
  color: var(--neutral-800);
}

.goal-list .tick {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  background: var(--eg-success-tint);
  color: var(--eg-success);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 12px;
  flex: none;
  margin-top: 2px;
}

/* Place Value Chart */
.pv-chart {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin: 20px 0;
  flex-wrap: wrap;
}

.pv-col {
  width: 90px;
  text-align: center;
}

.pv-label {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 6px 0;
  border-radius: 8px 8px 0 0;
  color: #ffffff;
}

.pv-col.hundreds .pv-label { background: var(--subj-maths); }
.pv-col.tens .pv-label { background: var(--subj-english); }
.pv-col.ones .pv-label { background: var(--subj-hindi); }

.pv-digit {
  font-family: var(--font-head);
  font-size: 34px;
  font-weight: 800;
  background: #ffffff;
  border: 2px solid var(--eg-line);
  border-top: none;
  border-radius: 0 0 8px 8px;
  padding: 8px 0;
  box-shadow: var(--shadow-sm);
}

.pv-col.hundreds .pv-digit { border-color: var(--subj-maths); }
.pv-col.tens .pv-digit { border-color: var(--subj-english); }
.pv-col.ones .pv-digit { border-color: var(--subj-hindi); }

.pv-sum {
  text-align: center;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  margin-top: 10px;
  color: var(--neutral-800);
}

.concept-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 18px auto;
  width: 100px;
  height: 100px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--eg-line);
}

/* Step Worked Examples */
.step-example {
  background: var(--neutral-50);
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 16px;
}

.step-example .ex-q {
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--neutral-900);
}

.step-list {
  list-style: none;
  padding: 0;
  margin: 0 0 14px;
  counter-reset: step;
}

.step-list li {
  display: none;
  padding: 8px 0 8px 34px;
  position: relative;
  font-size: 14.5px;
  border-bottom: 1px dashed var(--eg-line);
}

.step-list li.shown {
  display: block;
}

.step-list li.shown::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 8px;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  background: var(--eg-primary);
  color: #ffffff;
  font-size: 11px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.your-turn-box {
  background: #ffffff;
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.your-turn-box .yt-feedback {
  margin-top: 12px;
  font-weight: 700;
  min-height: 22px;
}

.yt-hint-text {
  background: var(--eg-accent-tint);
  border: 1px solid var(--eg-accent-border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13.5px;
  color: #92400e;
  margin-top: 12px;
  display: none;
}

.yt-hint-text.shown {
  display: block;
}

/* Key Point Cards */
.kp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.kp-card {
  background: #ffffff;
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.kp-card h3 {
  font-size: 15px;
  margin: 0 0 8px;
  color: var(--eg-primary);
}

.kp-card p {
  font-size: 14px;
  color: var(--neutral-700);
}

.kp-card .kp-example {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--eg-line);
  font-size: 13px;
  color: var(--neutral-500);
}

/* Worksheets */
.ws-group-title {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--neutral-400);
  margin: 28px 0 12px;
}

.ws-card {
  background: #ffffff;
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-fast);
}

.ws-card.correct {
  border-color: var(--eg-success);
  background: var(--eg-success-tint);
}

.ws-card.incorrect {
  border-color: var(--eg-error);
  background: var(--eg-error-tint);
}

.ws-card.revealed {
  border-color: var(--eg-secondary);
  background: var(--eg-secondary-tint);
}

.ws-q {
  font-weight: 600;
  margin-bottom: 10px;
  font-size: 14.5px;
  color: var(--neutral-900);
}

.ws-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 24px 0;
}

.ws-summary {
  font-weight: 700;
  margin-bottom: 16px;
  font-size: 15px;
}

/* Reveal Answers Cards */
.ans-card {
  background: #ffffff;
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-card);
}

.ans-q {
  font-weight: 600;
  margin-bottom: 10px;
  font-size: 14.5px;
}

.ans-reveal-content {
  display: none;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--eg-line);
}

.ans-reveal-content.shown {
  display: block;
}

.ans-reveal-content .ans-value {
  font-weight: 700;
  color: var(--eg-success);
}

/* ---------------- 15. LIBRARY SEARCH & TOOLBAR ---------------- */
.lib-toolbar {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr) auto;
  gap: 10px;
  margin-bottom: 16px;
  align-items: center;
}

.lib-meta {
  font-size: 13.5px;
  color: var(--neutral-500);
  margin: 12px 0 20px;
  font-weight: 500;
}

.lib-empty {
  text-align: center;
  padding: 64px 20px;
  color: var(--neutral-500);
  background: var(--neutral-50);
  border: 1px dashed var(--neutral-300);
  border-radius: var(--radius-lg);
  margin: 20px 0;
}

.lib-empty h3 {
  color: var(--neutral-800);
  margin-bottom: 8px;
}

/* ---------------- 16. FAQ ACCORDION ---------------- */
.faq-item {
  border-bottom: 1px solid var(--eg-line);
}

.faq-q {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 18px 4px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-family: var(--font-body);
  color: var(--neutral-900);
  transition: color var(--transition-fast);
}

.faq-q:hover {
  color: var(--eg-primary);
}

.faq-q .ico {
  flex: none;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--eg-line);
  color: var(--neutral-500);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
  transition: all var(--transition-fast);
}

.faq-item.open .faq-q .ico {
  transform: rotate(45deg);
  border-color: var(--eg-primary);
  color: var(--eg-primary);
  background: var(--eg-primary-tint);
}

.faq-a {
  padding: 0 4px 18px;
  color: var(--neutral-600);
  font-size: 15px;
  line-height: 1.6;
  display: none;
  animation: fadeIn 200ms ease;
}

.faq-item.open .faq-a {
  display: block;
}

/* ---------------- 17. TESTIMONIALS ---------------- */
.testi-track {
  display: flex;
  gap: 20px;
  overflow: hidden;
}

.testi-card {
  min-width: 100%;
  background: var(--neutral-50);
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.testi-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--grad-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-family: var(--font-head);
  flex: none;
}

.testi-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
}

.testi-nav {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 20px;
}

.testi-nav button {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--eg-line);
  background: #ffffff;
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neutral-700);
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-fast);
}

.testi-nav button:hover {
  background: var(--neutral-100);
  color: var(--neutral-900);
}

.testi-dots {
  display: flex;
  gap: 6px;
  justify-content: center;
  margin-top: 12px;
}

.testi-dots span {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--neutral-300);
  transition: all var(--transition-fast);
}

.testi-dots span.active {
  background: var(--eg-primary);
  width: 20px;
}

/* Subtle Placeholder / Notice Note */
.placeholder-note {
  font-size: 12px;
  color: var(--neutral-500);
  background: var(--neutral-100);
  border: 1px solid var(--eg-line);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  display: inline-block;
  margin-top: 12px;
}

/* ---------------- 18. SITE FOOTER ---------------- */
footer.site-footer {
  background: var(--neutral-950);
  color: var(--neutral-400);
  padding: 64px 0 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(4, 1fr);
  gap: 36px;
}

.footer-grid h4 {
  color: #ffffff;
  font-size: 13.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 16px;
}

.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-grid a {
  color: var(--neutral-400);
  font-size: 14px;
  transition: color var(--transition-fast);
}

.footer-grid a:hover {
  color: #ffffff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 48px;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 13px;
  color: var(--neutral-500);
}

.footer-bottom a {
  color: var(--neutral-400);
}

.footer-bottom a:hover {
  color: #ffffff;
}

/* ---------------- 19. FLOATING CONTROLS & STICKY CTA ---------------- */
.fab-whatsapp {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  background: #25D366;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.35);
  z-index: 55;
  border: none;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.fab-whatsapp:hover {
  transform: scale(1.06);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.45);
}

.mobile-sticky-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  display: none;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--eg-line);
  box-shadow: 0 -4px 16px rgba(15, 23, 42, 0.08);
}

/* Utility Helpers */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

.breadcrumbs {
  font-size: 13px;
  color: var(--neutral-500);
  margin-bottom: 20px;
}

.breadcrumbs a {
  color: var(--neutral-600);
}

.breadcrumbs a:hover {
  color: var(--eg-primary);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 450ms var(--ease-spring), transform 450ms var(--ease-spring);
}

[data-reveal].in {
  opacity: 1;
  transform: none;
}

/* ---------------- 20. RESPONSIVE BREAKPOINTS ---------------- */
@media (max-width: 1080px) {
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .appcard-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  nav.main-nav, .header-cta .btn-outline { display: none; }
  .hamburger { display: flex; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .lib-toolbar { grid-template-columns: 1fr 1fr; }
  .mobile-sticky-cta { display: block; }
  .fab-whatsapp { bottom: 76px; right: 16px; width: 46px; height: 46px; font-size: 22px; }
  .q-options { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .section-tight { padding: 36px 0; }
  .appcard { grid-template-columns: 1fr; padding: 24px; }
}

@media (max-width: 640px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .header-row { height: 60px; }
  .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .lib-toolbar { grid-template-columns: 1fr; }
  .modal-box { padding: 22px 18px; }
  .form-card { padding: 22px 16px; }
  .hero-video-section { min-height: 520px; }
  .hero-video-content { padding: 60px 0 40px; }
  .formula-row { gap: 10px; padding: 12px 16px; }
  .formula-op { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .float-badge { display: none; } /* Prevent layout clipping on narrow mobile */
}

@media (max-width: 375px) {
  .grid-5 { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr; }
  .phone-row select { flex: 0 0 80px; }
}

/* ---------------- 21. PRINT STYLES (WORKSHEETS & NOTES) ---------------- */
@media print {
  .announce,
  header.site-header,
  .mobile-nav,
  .modal-overlay,
  .fab-whatsapp,
  .mobile-sticky-cta,
  footer.site-footer,
  .tabs,
  .ws-actions,
  .watch-link,
  .formula-row,
  .video-frame,
  .cta-row,
  .breadcrumbs,
  .btn,
  .hamburger {
    display: none !important;
  }

  body {
    background: #ffffff !important;
    color: #111827 !important;
    font-size: 11pt !important;
    line-height: 1.5 !important;
  }

  .container {
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .tabpanel[hidden] {
    display: none !important;
  }

  .tabpanel {
    display: block !important;
  }

  .lesson-head {
    padding: 12px 0 16px !important;
    border-bottom: 2px solid #111827;
    margin-bottom: 20px;
  }

  .lesson-head h1 {
    font-size: 20pt !important;
    margin: 0 0 4px;
    color: #000000 !important;
  }

  .lesson-visual {
    display: none !important;
  }

  .ws-card {
    border: 1px solid #d1d5db !important;
    border-radius: 4px !important;
    box-shadow: none !important;
    page-break-inside: avoid;
    margin-bottom: 14px;
    padding: 12px 14px !important;
    background: #ffffff !important;
  }

  .ws-card input,
  .ws-card textarea {
    border: none !important;
    border-bottom: 1px dashed #9ca3af !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
    min-height: 28px !important;
  }

  .ws-group-title {
    font-size: 11pt !important;
    font-weight: 800 !important;
    color: #111827 !important;
    margin: 20px 0 10px !important;
    border-bottom: 1px solid #e5e7eb;
    padding-bottom: 4px;
  }

  .kp-card {
    border: 1px solid #e5e7eb !important;
    box-shadow: none !important;
    page-break-inside: avoid;
    margin-bottom: 12px;
  }
}