/* =============================================================================
   B ACADEMY — Design System v1.0
   Primary: #5A3CF0 | Accent: #FF6B4A | Success: #15BE8B
   Fonts: Baloo Da 2 (display) + Hind Siliguri (body) + Plus Jakarta Sans (latin)
   ============================================================================= */

/* ── CSS Variables ─────────────────────────────────────────────────────────── */
:root {
  /* Brand colors */
  --c-primary:       #5A3CF0;
  --c-primary-2:     #8B6CFF;
  --c-primary-dark:  #3D22D6;
  --c-primary-light: #EEE9FF;
  --c-accent:        #FF6B4A;
  --c-accent-light:  #FFF0ED;
  --c-success:       #15BE8B;
  --c-success-light: #E6FBF5;
  --c-warning:       #F59E0B;
  --c-warning-light: #FFFBEB;
  --c-error:         #EF4444;
  --c-error-light:   #FEF2F2;
  --c-info:          #3B82F6;

  /* Neutrals */
  --c-ink:           #111428;
  --c-ink-light:     #374151;
  --c-ink-muted:     #6B7280;
  --c-ink-faint:     #9CA3AF;
  --c-surface:       #F3F0FD;
  --c-surface-2:     #FFFFFF;
  --c-border:        #E5E7EB;
  --c-border-focus:  #5A3CF0;

  /* Typography */
  --font-display: 'Baloo Da 2', 'Hind Siliguri', sans-serif;
  --font-body:    'Hind Siliguri', 'Noto Sans Bengali', sans-serif;
  --font-latin:   'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Font sizes (fluid) */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

  /* Spacing (8-pt scale) */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.25rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;

  /* Radius */
  --r-sm:   8px;
  --r-md:   12px;
  --r-lg:   18px;
  --r-xl:   24px;
  --r-full: 9999px;

  /* Shadows */
  --shadow-xs:      0 1px 2px rgba(0,0,0,.06);
  --shadow-sm:      0 1px 4px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:      0 4px 16px rgba(0,0,0,.10), 0 2px 6px rgba(0,0,0,.06);
  --shadow-lg:      0 12px 32px rgba(90, 60, 240, 0.15), 0 4px 12px rgba(0,0,0,.06);
  --shadow-primary: 0 8px 24px rgba(90,60,240,.35);
  --shadow-card:    0 8px 30px rgba(0, 0, 0, 0.04);
  
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);

  /* Transitions */
  --t-fast:   150ms ease;
  --t-base:   200ms ease;
  --t-slow:   350ms ease;
  --t-spring: cubic-bezier(.34,1.56,.64,1);

  /* Layout */
  --max-w:        1200px;
  --nav-h:        68px;
  --bottom-nav-h: 60px;
}

/* ── Reset ─────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; max-width: 100%; overflow-x: hidden; }
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--c-ink);
  background: var(--c-surface-2);
  min-height: 100vh;
  max-width: 100%;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img, video { max-width: 100%; display: block; }
a { color: var(--c-primary); text-decoration: none; transition: color var(--t-base); }
a:hover { color: var(--c-primary-dark); }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* ── Typography ────────────────────────────────────────────────────────────── */
h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-ink);
  overflow-wrap: break-word;
  word-break: break-word;
}
p, .course-title, .ccp-title { overflow-wrap: break-word; }
h1 { font-size: clamp(1.75rem, 4vw, var(--text-5xl)); }
h2 { font-size: clamp(1.4rem, 3vw, var(--text-4xl)); }
h3 { font-size: clamp(1.2rem, 2.5vw, var(--text-3xl)); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
p  { margin-bottom: var(--sp-4); color: var(--c-ink-light); }
p:last-child { margin-bottom: 0; }
.latin { font-family: var(--font-latin); }
.display { font-family: var(--font-display); }
.text-primary { color: var(--c-primary) !important; }
.text-accent  { color: var(--c-accent) !important; }
.text-success { color: var(--c-success) !important; }
.text-muted   { color: var(--c-ink-muted) !important; }
.text-danger  { color: var(--c-error) !important; }
.font-bold    { font-weight: 700; }
.font-semi    { font-weight: 600; }
.text-center  { text-align: center; }
.text-sm      { font-size: var(--text-sm); }
.text-xs      { font-size: var(--text-xs); }
.text-lg      { font-size: var(--text-lg); }
.text-xl      { font-size: var(--text-xl); }

/* ── Layout ────────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-4);
}
@media (min-width: 768px) { .container { padding: 0 var(--sp-6); } }
@media (min-width: 1280px) { .container { padding: 0 var(--sp-8); } }

.d-none     { display: none !important; }
.d-flex     { display: flex !important; }
.d-grid     { display: grid !important; }
.d-block    { display: block !important; }
@media (min-width: 768px) {
  .d-md-flex  { display: flex !important; }
  .d-md-none  { display: none !important; }
  .d-md-block { display: block !important; }
  .d-none { display: none !important; }
}
@media (min-width: 768px) {
  .d-md-inline { display: inline !important; }
}

.flex     { display: flex; }
.flex-col { flex-direction: column; }
.items-center  { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.gap-2  { gap: var(--sp-2); }
.gap-3  { gap: var(--sp-3); }
.gap-4  { gap: var(--sp-4); }
.gap-6  { gap: var(--sp-6); }
.gap-8  { gap: var(--sp-8); }
.mt-4   { margin-top: var(--sp-4); }
.mb-4   { margin-bottom: var(--sp-4); }
.mt-6   { margin-top: var(--sp-6); }
.mt-8   { margin-top: var(--sp-8); }
.mt-2   { margin-top: var(--sp-2); }

/* Grid system */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-6); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-6); }
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); gap: var(--sp-4); }
}
@media (max-width: 480px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Section */
.section { padding: var(--sp-16) 0; }
.section-sm { padding: var(--sp-10) 0; }
.section-header { margin-bottom: var(--sp-10); }
.section-header.flex { display: flex; align-items: flex-end; justify-content: space-between; flex-wrap: wrap; gap: var(--sp-4); }
.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--c-primary);
  background: var(--c-primary-light);
  padding: var(--sp-1) var(--sp-3);
  border-radius: var(--r-full);
  margin-bottom: var(--sp-3);
}
.section-title { font-size: clamp(1.4rem, 3vw, 2.2rem); }
.section-sub   { color: var(--c-ink-muted); margin-top: var(--sp-2); font-size: var(--text-lg); }
.view-all-link {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--c-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  white-space: nowrap;
  padding: 10px 20px;
  background: rgba(90, 60, 240, 0.08);
  border-radius: var(--r-full);
  transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
}
.view-all-link:hover { 
  background: var(--c-primary);
  color: #fff;
  transform: translateX(4px);
  box-shadow: 0 4px 12px rgba(90, 60, 240, 0.25);
}

/* ── Buttons ────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 0.65rem 1.5rem;
  border-radius: var(--r-full);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1;
  transition: all var(--t-base);
  cursor: pointer;
  border: 2px solid transparent;
  white-space: nowrap;
  text-decoration: none;
}
.btn:disabled { opacity: .5; pointer-events: none; }
.btn-sm { padding: 0.5rem 1.125rem; font-size: var(--text-sm); }
.btn-lg { padding: 0.875rem 2rem; font-size: var(--text-lg); }
.btn-xl { padding: 1rem 2.5rem; font-size: var(--text-xl); }
.btn-block { width: 100%; }

.btn-primary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover {
  background: var(--c-primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(90,60,240,.40);
}
.btn-primary:active { transform: translateY(0); }

.btn-accent {
  background: var(--c-accent);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255,107,74,.30);
}
.btn-accent:hover { background: #e85a38; color: #fff; transform: translateY(-2px); }

.btn-success {
  background: var(--c-success);
  color: #fff;
}
.btn-success:hover { background: #12a578; color: #fff; transform: translateY(-2px); }

.btn-outline {
  background: transparent;
  color: var(--c-primary);
  border-color: var(--c-primary);
}
.btn-outline:hover {
  background: var(--c-primary);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--c-ink-light);
  border-color: var(--c-border);
}
.btn-ghost:hover { background: var(--c-surface); color: var(--c-ink); }

.btn-white {
  background: #fff;
  color: var(--c-primary);
  box-shadow: var(--shadow-md);
}
.btn-white:hover { background: var(--c-surface); color: var(--c-primary-dark); transform: translateY(-2px); }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--r-full);
  color: var(--c-ink-light);
  cursor: pointer;
  transition: all var(--t-base);
  background: none;
  border: none;
}
.icon-btn:hover { background: var(--c-surface); color: var(--c-ink); }

/* ── Forms ──────────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: var(--sp-5); }
.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: var(--sp-2);
}
.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--c-border);
  border-radius: var(--r-md);
  font-size: var(--text-base);
  font-family: var(--font-body);
  color: var(--c-ink);
  background: var(--c-surface-2);
  transition: border-color var(--t-base), box-shadow var(--t-base);
  outline: none;
  -webkit-appearance: none;
}
.form-control:focus {
  border-color: var(--c-border-focus);
  box-shadow: 0 0 0 3px rgba(90,60,240,.15);
}
.form-control::placeholder { color: var(--c-ink-faint); }
.form-control.is-error { border-color: var(--c-error); }
.form-control.is-success { border-color: var(--c-success); }
.form-hint { font-size: var(--text-xs); color: var(--c-ink-muted); margin-top: var(--sp-1); }
.form-error { font-size: var(--text-xs); color: var(--c-error); margin-top: var(--sp-1); }
.input-wrap { position: relative; }
.input-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--c-ink-faint);
  pointer-events: none;
}
.input-wrap .form-control { padding-left: 2.75rem; }
.input-wrap .form-control.has-right { padding-right: 2.75rem; }
.input-icon-right {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--c-ink-faint);
  cursor: pointer;
}

/* OTP input */
.otp-group {
  display: flex;
  gap: var(--sp-3);
  justify-content: center;
  flex-wrap: wrap;
}
.otp-input {
  width: 52px;
  height: 56px;
  text-align: center;
  font-size: var(--text-2xl);
  font-weight: 700;
  border: 2px solid var(--c-border);
  border-radius: var(--r-md);
  outline: none;
  transition: all var(--t-base);
}
@media (max-width: 430px) {
  .otp-group { gap: var(--sp-2); }
  .otp-input { width: 13.5vw; max-width: 44px; height: 48px; font-size: var(--text-xl); }
}
.otp-input:focus { border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(90,60,240,.15); }
.otp-input.filled { border-color: var(--c-primary); background: var(--c-primary-light); }

/* ── Cards ──────────────────────────────────────────────────────────────────── */
.card {
  background: var(--c-surface-2);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--c-border);
  overflow: hidden;
  transition: transform var(--t-base), box-shadow var(--t-base);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Course card */
.course-card {
  background: var(--c-surface-2);
  border-radius: calc(var(--r-xl) + 4px);
  border: 1px solid rgba(0,0,0,0.04);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.03);
  transition: transform 0.3s cubic-bezier(0.25, 1, 0.5, 1), box-shadow 0.3s cubic-bezier(0.25, 1, 0.5, 1);
  display: flex;
  flex-direction: column;
}
.course-card:hover { 
  transform: translateY(-6px) scale(1.01); 
  box-shadow: 0 16px 40px rgba(90, 60, 240, 0.12), 0 4px 12px rgba(0,0,0,0.04); 
}
.course-card:hover .course-thumb img { transform: scale(1.08); }

.course-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--c-surface);
}
.course-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--t-slow);
}
.course-badge {
  position: absolute;
  top: var(--sp-3);
  left: var(--sp-3);
  padding: var(--sp-1) var(--sp-3);
  border-radius: var(--r-full);
  font-size: var(--text-xs);
  font-weight: 700;
  background: var(--c-primary);
  color: #fff;
}
.course-badge.free  { background: var(--c-success); }
.course-badge.live  { background: var(--c-accent); }
.course-badge.sale  { background: var(--c-warning); color: var(--c-ink); }
.course-play-btn {
  position: absolute;
  bottom: var(--sp-3);
  right: var(--sp-3);
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,.9);
  border-radius: var(--r-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-primary);
  opacity: 0;
  transform: scale(.8);
  transition: all var(--t-base);
}
.course-card:hover .course-play-btn { opacity: 1; transform: scale(1); }

.course-body {
  padding: var(--sp-4);
  display: flex;
  flex-direction: column;
  flex: 1;
}
.course-category {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--c-primary);
  margin-bottom: var(--sp-2);
}
.course-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--c-ink);
  line-height: 1.4;
  margin-bottom: var(--sp-3);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.course-teacher {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-3);
  font-size: var(--text-sm);
  color: var(--c-ink-muted);
}
.course-teacher img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
}
.course-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: var(--text-xs);
  color: var(--c-ink-muted);
  margin-bottom: var(--sp-4);
  flex-wrap: wrap;
}
.course-meta-item { display: flex; align-items: center; gap: var(--sp-1); }
.course-meta-item .material-icons-round { font-size: 14px; }

.course-footer {
  margin-top: auto;
  padding-top: var(--sp-3);
  border-top: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.course-price { display: flex; align-items: baseline; gap: var(--sp-2); }
.price-current {
  font-family: var(--font-latin);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--c-primary);
}
.price-free { color: var(--c-success); }
.price-old {
  font-family: var(--font-latin);
  font-size: var(--text-sm);
  color: var(--c-ink-faint);
  text-decoration: line-through;
}

/* Stars */
.stars { display: inline-flex; gap: 1px; }
.star { font-size: 14px; line-height: 1; }
.star-full  { color: #F59E0B; }
.star-half  { color: #F59E0B; opacity: .5; }
.star-empty { color: #D1D5DB; }
.stars-mini .star { font-size: 11px; }
.rating-wrap { display: flex; align-items: center; gap: var(--sp-2); }
.rating-val {
  font-family: var(--font-latin);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--c-warning);
}
.rating-count { font-size: var(--text-xs); color: var(--c-ink-muted); }

/* ── Navbar ─────────────────────────────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1600;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  transition: box-shadow var(--t-base);
}
.navbar.scrolled { box-shadow: var(--shadow-md); }
.navbar-inner {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  text-decoration: none;
  min-width: 0;
}
.brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-2));
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: var(--font-latin);
  font-size: 1.25rem;
  font-weight: 800;
}
.brand-icon-sm { width: 32px; height: 32px; font-size: 1rem; border-radius: var(--r-sm); }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; overflow: hidden; }
.brand-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--c-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
  max-width: 100%;
}
.brand-tagline { font-size: 10px; color: var(--c-ink-muted); display: none; }
@media (min-width: 768px) { .brand-tagline { display: block; } }

.navbar-categories {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.navbar-categories::-webkit-scrollbar { display: none; }
.nav-cat {
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--r-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--c-ink-light);
  white-space: nowrap;
  transition: all var(--t-base);
}
.nav-cat:hover, .nav-cat.active {
  background: var(--c-primary-light);
  color: var(--c-primary);
}
.navbar-right {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-left: auto;
  flex-shrink: 0;
}

/* Dropdowns */
.dropdown-menu {
  position: absolute;
  top: calc(100% + var(--sp-2));
  right: 0;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-md);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--t-base);
  z-index: 1000;
  padding: var(--sp-2) 0;
}
.dropdown-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown-header {
  padding: var(--sp-2) var(--sp-4);
  font-size: var(--text-sm);
  border-bottom: 1px solid var(--c-border);
  margin-bottom: var(--sp-2);
  display: flex;
  flex-direction: column;
}
.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  font-size: var(--text-sm);
  color: var(--c-ink);
  text-decoration: none;
  transition: var(--t-fast);
}
.dropdown-item:hover {
  background: var(--c-surface);
  color: var(--c-primary);
}
.dropdown-divider {
  height: 1px;
  background: var(--c-border);
  margin: var(--sp-1) 0;
}
.user-menu-wrap, .notif-wrap { position: relative; }
.user-menu-btn {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--sp-1);
  border-radius: var(--r-full);
  transition: var(--t-fast);
}
.user-menu-btn:hover { background: var(--c-surface); }
.user-avatar-sm {
  width: 36px; height: 36px; border-radius: 50%; object-fit: cover;
}
.user-name-sm { font-weight: 600; font-size: var(--text-sm); }

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--c-ink);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-1);
}
@media (min-width: 768px) {
  .mobile-menu-toggle { display: none; }
}


/* Search bar */
.search-bar-wrap {
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--t-slow);
  border-top: 1px solid transparent;
  background: var(--c-surface);
}
.search-bar-wrap.open {
  max-height: 70px;
  border-top-color: var(--c-border);
}
.search-bar-form {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) 0;
}
.search-icon { color: var(--c-ink-faint); }
.search-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: var(--text-base);
  color: var(--c-ink);
  outline: none;
  font-family: var(--font-body);
}
.search-input::placeholder { color: var(--c-ink-faint); }

/* Mobile nav */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background: var(--c-surface-2);
  z-index: 2000;
  box-shadow: var(--shadow-lg);
  transition: right var(--t-slow);
  overflow-y: auto;
}
.mobile-nav.open { right: 0; }
.mobile-nav-inner { padding: var(--sp-8) var(--sp-6) var(--sp-6); }
.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-2);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--c-ink-light);
  border-radius: var(--r-md);
  transition: all var(--t-base);
  text-decoration: none;
}
.mobile-nav-link:hover { background: var(--c-surface); color: var(--c-primary); }
.mobile-nav-divider { height: 1px; background: var(--c-border); margin: var(--sp-4) 0; }

/* Overlay */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 1500;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base);
}
.overlay.show { opacity: 1; pointer-events: all; }

/* ── Dropdowns ───────────────────────────────────────────────────────────────── */
.notif-wrap, .user-menu-wrap { position: relative; }
.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 240px;
  background: var(--c-surface-2);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--c-border);
  overflow: hidden;
  opacity: 0;
  transform: translateY(-8px) scale(.97);
  pointer-events: none;
  transition: opacity .2s cubic-bezier(.22,1,.36,1), transform .2s cubic-bezier(.22,1,.36,1);
  z-index: 200;
}
.dropdown-menu.open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: all;
}
.dropdown-header {
  padding: var(--sp-4);
  font-weight: 700;
  color: var(--c-ink);
  border-bottom: 1px solid var(--c-border);
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}
.dropdown-header small { font-weight: 400; color: var(--c-ink-muted); font-size: var(--text-xs); }
.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  color: var(--c-ink-light);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: background var(--t-fast);
}
.dropdown-item:hover { background: var(--c-surface); color: var(--c-ink); }
.dropdown-item .material-icons-round { font-size: 18px; color: var(--c-ink-muted); }
.dropdown-divider { height: 1px; background: var(--c-border); margin: var(--sp-2) 0; }
.dropdown-empty { padding: var(--sp-6); text-align: center; color: var(--c-ink-muted); font-size: var(--text-sm); }

/* Sidebar profile dropdown (admin/teacher panels) — fixed so the sidebar's
   overflow-y:auto (which forces overflow-x clipping) can't cut it off */
.sidebar-user-dropdown {
  position: fixed !important;
  top: auto !important;
  left: 16px;
  width: 232px;
  min-width: 0;
}

/* Notification dropdown */
.notif-dropdown { min-width: 320px; }

/* On phones, anchor every navbar dropdown to the viewport edges (not the
   trigger button) so a min-width menu can never bleed off-screen. */
@media (max-width: 480px) {
  .dropdown-menu {
    position: fixed;
    top: calc(var(--nav-h) + 8px);
    left: var(--sp-4);
    right: var(--sp-4);
    min-width: 0;
    width: auto;
    max-width: none;
  }
}
.notif-item {
  display: flex;
  flex-direction: column;
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--c-border);
  transition: background var(--t-fast);
}
.notif-item:hover { background: var(--c-surface); }
.notif-item.unread { background: var(--c-primary-light); }
.notif-title { font-size: var(--text-sm); font-weight: 600; color: var(--c-ink); }
.notif-time  { font-size: var(--text-xs); color: var(--c-ink-muted); margin-top: var(--sp-1); }

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 var(--sp-1);
  border-radius: var(--r-full);
  font-size: 10px;
  font-weight: 700;
  font-family: var(--font-latin);
}
.badge-notif {
  position: absolute;
  top: -4px;
  right: -4px;
  background: var(--c-error);
  color: #fff;
}

/* User avatar */
.user-menu-btn {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-1) var(--sp-2);
  border-radius: var(--r-full);
  border: 2px solid var(--c-border);
  background: transparent;
  cursor: pointer;
  transition: all var(--t-base);
}
.user-menu-btn:hover { border-color: var(--c-primary); background: var(--c-primary-light); }
.user-avatar-sm {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}
.user-name-sm { font-size: var(--text-sm); font-weight: 600; color: var(--c-ink); }

/* ── Hero Section ────────────────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, #0D0B2E 0%, #1A0A5E 40%, #2D1B8A 70%, #1A0A5E 100%);
  color: #fff;
  padding: var(--sp-20) 0;
  position: relative;
  overflow: hidden;
  min-height: 560px;
  display: flex;
  align-items: center;
}
.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(90,60,240,.35) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255,107,74,.20) 0%, transparent 70%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-12);
  align-items: center;
  position: relative;
  z-index: 1;
}
@media (max-width: 768px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .hero { min-height: 0; padding: var(--sp-12) 0; }
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--r-full);
  padding: var(--sp-2) var(--sp-4);
  font-size: var(--text-sm);
  font-weight: 600;
  color: rgba(255,255,255,.9);
  margin-bottom: var(--sp-5);
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  color: #fff;
  margin-bottom: var(--sp-5);
}
.hero-title span { color: var(--c-accent); }
.hero-subtitle {
  font-size: var(--text-lg);
  color: rgba(255,255,255,.75);
  line-height: 1.7;
  margin-bottom: var(--sp-8);
}
.hero-actions { display: flex; gap: var(--sp-4); flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: var(--sp-6);
  margin-top: var(--sp-10);
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat-num {
  font-family: var(--font-latin);
  font-size: var(--text-3xl);
  font-weight: 800;
  color: #fff;
  display: block;
}
.hero-stat-label { font-size: var(--text-sm); color: rgba(255,255,255,.6); }

.hero-visual { position: relative; }
.hero-card {
  background: rgba(255,255,255,.10);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--r-xl);
  padding: var(--sp-5);
  color: #fff;
}
.hero-card-img { border-radius: var(--r-lg); margin-bottom: var(--sp-4); }
.hero-card-students {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  background: rgba(255,255,255,.1);
  border-radius: var(--r-full);
  padding: var(--sp-2) var(--sp-4);
  margin-top: var(--sp-4);
}
.hero-avatars { display: flex; }
.hero-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,.3);
  margin-left: -8px;
  background: var(--c-primary-2);
  object-fit: cover;
}
.hero-avatar:first-child { margin-left: 0; }

/* ── Stats Bar ───────────────────────────────────────────────────────────────── */
.stats-bar {
  background: var(--c-surface-2);
  border-bottom: 1px solid var(--c-border);
  padding: var(--sp-6) 0;
}
.stats-bar-inner {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-6);
}
.stat-item { text-align: center; }
.stat-num {
  font-family: var(--font-latin);
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--c-primary);
  display: block;
  line-height: 1;
}
.stat-label { font-size: var(--text-sm); color: var(--c-ink-muted); margin-top: var(--sp-1); }

/* ── Category pills ─────────────────────────────────────────────────────────── */
.cat-pills {
  display: flex;
  gap: var(--sp-3);
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: var(--sp-8);
}
.cat-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-5);
  border-radius: var(--r-full);
  border: 2px solid var(--c-border);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--c-ink-light);
  cursor: pointer;
  transition: all var(--t-base);
  text-decoration: none;
}
.cat-pill:hover, .cat-pill.active {
  border-color: var(--c-primary);
  background: var(--c-primary-light);
  color: var(--c-primary);
}
.cat-pill .material-icons-round { font-size: 18px; }

/* ── Horizontal scroll rail ─────────────────────────────────────────────────── */
.scroll-rail {
  display: flex;
  gap: var(--sp-4);
  overflow-x: auto;
  padding-bottom: var(--sp-3);
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.scroll-rail::-webkit-scrollbar { display: none; }
.scroll-rail > * { scroll-snap-align: start; flex-shrink: 0; }
.scroll-rail .course-card { width: 280px; }

/* ── Teacher card ────────────────────────────────────────────────────────────── */
.teacher-card {
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
  text-align: center;
  transition: all var(--t-base);
  cursor: pointer;
  text-decoration: none;
  display: block;
}
.teacher-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--c-primary); }
.teacher-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto var(--sp-4);
  border: 3px solid var(--c-primary-light);
}
.teacher-name { font-family: var(--font-display); font-size: var(--text-base); font-weight: 700; color: var(--c-ink); margin-bottom: var(--sp-1); }
.teacher-designation { font-size: var(--text-sm); color: var(--c-ink-muted); margin-bottom: var(--sp-3); }
.teacher-stats { display: flex; justify-content: center; gap: var(--sp-4); }
.teacher-stat { font-size: var(--text-xs); color: var(--c-ink-muted); display: flex; align-items: center; gap: 3px; }
.teacher-stat strong { color: var(--c-primary); font-family: var(--font-latin); }

/* ── Testimonials ────────────────────────────────────────────────────────────── */
.testimonial-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-card);
  transition: var(--t-base);
  padding: var(--sp-6);
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.testimonial-quote {
  font-size: var(--text-base);
  color: var(--c-ink-light);
  line-height: 1.7;
  margin-bottom: var(--sp-5);
  position: relative;
}
.testimonial-quote::before {
  content: '"';
  font-size: 4rem;
  color: var(--c-primary-light);
  font-family: serif;
  line-height: 1;
  position: absolute;
  top: -10px;
  left: -5px;
}
.testimonial-author { display: flex; align-items: center; gap: var(--sp-3); }
.testimonial-avatar { width: 48px; height: 48px; border-radius: 50%; object-fit: cover; }
.testimonial-name { font-weight: 700; color: var(--c-ink); font-size: var(--text-sm); }
.testimonial-batch { font-size: var(--text-xs); color: var(--c-ink-muted); }

/* ── Dashboard ───────────────────────────────────────────────────────────────── */
.dashboard-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  min-height: calc(100vh - var(--nav-h));
}
@media (max-width: 1024px) { .dashboard-layout { grid-template-columns: 1fr; } }

.dash-sidebar {
  background: var(--c-surface-2);
  border-right: 1px solid var(--c-border);
  padding: var(--sp-6) 0;
  position: sticky;
  top: var(--nav-h);
  height: calc(100vh - var(--nav-h));
  overflow-y: auto;
}
@media (max-width: 1024px) { .dash-sidebar { display: none; } }

.dash-nav-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-6);
  color: var(--c-ink-light);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: all var(--t-base);
  text-decoration: none;
}
.dash-nav-item:hover { background: var(--c-surface); color: var(--c-primary); }
.dash-nav-item.active {
  background: var(--c-primary-light);
  color: var(--c-primary);
  border-right: 3px solid var(--c-primary);
}
.dash-nav-item .material-icons-round { font-size: 20px; }
.dash-nav-section {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--c-ink-faint);
  padding: var(--sp-4) var(--sp-6) var(--sp-2);
}

.dash-content { padding: var(--sp-8); }
@media (max-width: 768px) { .dash-content { padding: var(--sp-4); } }

.dash-welcome {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-2));
  border-radius: var(--r-xl);
  padding: var(--sp-6) var(--sp-8);
  color: #fff;
  margin-bottom: var(--sp-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  overflow: hidden;
  position: relative;
}
.dash-welcome::after {
  content: '';
  position: absolute;
  right: -40px;
  top: -40px;
  width: 200px;
  height: 200px;
  background: rgba(255,255,255,.08);
  border-radius: 50%;
}
.dash-welcome-title { font-size: var(--text-2xl); font-weight: 800; margin-bottom: var(--sp-1); }
.dash-welcome-sub { color: rgba(255,255,255,.75); font-size: var(--text-sm); }

.stat-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-4); margin-bottom: var(--sp-8); }
@media (max-width: 1024px) { .stat-cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px)  { .stat-cards { grid-template-columns: 1fr; } }

.stat-card {
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
  display: flex;
  gap: var(--sp-4);
  align-items: flex-start;
}
.stat-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.stat-card-icon .material-icons-round { font-size: 24px; }
.stat-card-icon.primary { background: var(--c-primary-light); color: var(--c-primary); }
.stat-card-icon.accent  { background: var(--c-accent-light); color: var(--c-accent); }
.stat-card-icon.success { background: var(--c-success-light); color: var(--c-success); }
.stat-card-icon.warning { background: var(--c-warning-light); color: var(--c-warning); }
.stat-card-value { font-family: var(--font-latin); font-size: var(--text-3xl); font-weight: 800; color: var(--c-ink); line-height: 1; }
.stat-card-label { font-size: var(--text-sm); color: var(--c-ink-muted); margin-top: var(--sp-1); }

/* Progress bar */
.progress-bar {
  height: 8px;
  background: var(--c-border);
  border-radius: var(--r-full);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--c-primary), var(--c-primary-2));
  border-radius: var(--r-full);
  transition: width var(--t-slow);
}
.progress-fill.success { background: linear-gradient(90deg, var(--c-success), #0ea572); }
.progress-fill.accent  { background: linear-gradient(90deg, var(--c-accent), #e85a38); }

/* ── Alert / Flash ───────────────────────────────────────────────────────────── */
.flash-container {
  position: fixed;
  top: calc(var(--nav-h) + var(--sp-4));
  right: var(--sp-4);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  max-width: 380px;
  width: calc(100% - var(--sp-8));
}
.alert {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-4);
  border-radius: var(--r-md);
  font-size: var(--text-sm);
  font-weight: 500;
  box-shadow: var(--shadow-md);
  animation: slideInRight .3s var(--t-spring);
}
.alert .material-icons-round { font-size: 20px; flex-shrink: 0; }
.alert span:not(.material-icons-round):not(.alert-close) { flex: 1; }
.alert-success { background: var(--c-success-light); color: #0a5940; border: 1px solid #a7f3d0; }
.alert-success .material-icons-round { color: var(--c-success); }
.alert-error   { background: var(--c-error-light); color: #7f1d1d; border: 1px solid #fecaca; }
.alert-error .material-icons-round { color: var(--c-error); }
.alert-warning { background: var(--c-warning-light); color: #78350f; border: 1px solid #fde68a; }
.alert-warning .material-icons-round { color: var(--c-warning); }
.alert-info    { background: #EFF6FF; color: #1e3a5f; border: 1px solid #bfdbfe; }
.alert-close { background: none; border: none; cursor: pointer; padding: 0; opacity: .5; font-size: 14px; margin-left: auto; }
.alert-close:hover { opacity: 1; }

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ── Auth pages ──────────────────────────────────────────────────────────────── */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: stretch;
  background: var(--c-surface);
}
.auth-left {
  flex: 1;
  background: linear-gradient(135deg, #0D0B2E, #2D1B8A);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--sp-12);
  color: #fff;
  display: none;
}
@media (min-width: 1024px) { .auth-left { display: flex; } }
.auth-right {
  flex: 0 0 auto;
  width: 100%;
  max-width: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-8) var(--sp-6);
}
@media (min-width: 1024px) { .auth-right { width: 480px; } }
.auth-box { width: 100%; }
.auth-title { font-size: var(--text-3xl); font-weight: 800; margin-bottom: var(--sp-2); }
.auth-sub { color: var(--c-ink-muted); margin-bottom: var(--sp-8); }
.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin: var(--sp-6) 0;
  color: var(--c-ink-muted);
  font-size: var(--text-sm);
}
.auth-divider::before, .auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--c-border);
}
.auth-footer { text-align: center; margin-top: var(--sp-6); font-size: var(--text-sm); color: var(--c-ink-muted); }
.auth-footer a { font-weight: 700; }

/* ── Video Player ────────────────────────────────────────────────────────────── */
.player-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  min-height: calc(100vh - var(--nav-h));
  background: #0D0B2E;
}
@media (max-width: 1024px) { .player-layout { grid-template-columns: 1fr; background: var(--c-surface-2); } }

.player-main { display: flex; flex-direction: column; }
.video-wrap {
  position: relative;
  background: #000;
  aspect-ratio: 16/9;
}
.video-wrap iframe, .video-wrap video {
  width: 100%;
  height: 100%;
  border: none;
}
.player-info { padding: var(--sp-6); color: #fff; flex: 1; }
@media (max-width: 1024px) { .player-info { background: var(--c-surface-2); color: var(--c-ink); } }
.player-title { font-size: var(--text-xl); font-weight: 700; margin-bottom: var(--sp-2); }
.player-meta  { font-size: var(--text-sm); color: rgba(255,255,255,.6); }
@media (max-width: 1024px) { .player-meta { color: var(--c-ink-muted); } }

.player-sidebar {
  background: var(--c-surface-2);
  border-left: 1px solid var(--c-border);
  overflow-y: auto;
}
.lesson-list-item {
  display: flex;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  cursor: pointer;
  border-bottom: 1px solid var(--c-border);
  transition: background var(--t-fast);
  align-items: flex-start;
}
.lesson-list-item:hover { background: var(--c-surface); }
.lesson-list-item.active { background: var(--c-primary-light); }
.lesson-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--c-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 700;
  flex-shrink: 0;
  color: var(--c-ink-muted);
  font-family: var(--font-latin);
}
.lesson-list-item.active .lesson-num { background: var(--c-primary); color: #fff; }
.lesson-list-item.done .lesson-num { background: var(--c-success); color: #fff; }
.lesson-info { flex: 1; }
.lesson-list-title { font-size: var(--text-sm); font-weight: 600; color: var(--c-ink); line-height: 1.4; }
.lesson-list-meta  { font-size: var(--text-xs); color: var(--c-ink-muted); margin-top: var(--sp-1); display: flex; gap: var(--sp-2); }

/* ── Exam ────────────────────────────────────────────────────────────────────── */
.exam-layout { max-width: 860px; margin: 0 auto; padding: var(--sp-6); }
.exam-header {
  background: var(--c-primary);
  color: #fff;
  padding: var(--sp-5) var(--sp-6);
  border-radius: var(--r-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--sp-6);
}
.exam-timer {
  font-family: var(--font-latin);
  font-size: var(--text-2xl);
  font-weight: 800;
  background: rgba(255,255,255,.15);
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--r-md);
}
.exam-timer.warning { background: rgba(239,68,68,.3); animation: pulse 1s infinite; }

.question-card {
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  margin-bottom: var(--sp-4);
}
.question-num {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: var(--sp-3);
  font-family: var(--font-latin);
}
.question-stem { font-size: var(--text-lg); line-height: 1.6; margin-bottom: var(--sp-5); color: var(--c-ink); }
.option-list { display: flex; flex-direction: column; gap: var(--sp-3); }
.option-item {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-4);
  border: 2px solid var(--c-border);
  border-radius: var(--r-md);
  cursor: pointer;
  transition: all var(--t-base);
}
.option-item:hover { border-color: var(--c-primary); background: var(--c-primary-light); }
.option-item.selected { border-color: var(--c-primary); background: var(--c-primary-light); }
.option-item.correct  { border-color: var(--c-success); background: var(--c-success-light); }
.option-item.wrong    { border-color: var(--c-error); background: var(--c-error-light); }
.option-label {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--c-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-sm);
  flex-shrink: 0;
  font-family: var(--font-latin);
  transition: all var(--t-base);
}
.option-item.selected .option-label { background: var(--c-primary); color: #fff; }
.option-item.correct .option-label  { background: var(--c-success); color: #fff; }
.option-item.wrong .option-label    { background: var(--c-error); color: #fff; }
.option-text { font-size: var(--text-base); color: var(--c-ink); line-height: 1.5; }

.exam-nav { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin: var(--sp-4) 0; }
.exam-nav-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--r-md);
  border: 2px solid var(--c-border);
  background: var(--c-surface-2);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--c-ink-light);
  cursor: pointer;
  transition: all var(--t-base);
  font-family: var(--font-latin);
}
.exam-nav-btn:hover    { border-color: var(--c-primary); color: var(--c-primary); }
.exam-nav-btn.answered { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }
.exam-nav-btn.current  { border-color: var(--c-accent); color: var(--c-accent); }

/* ── Admin ───────────────────────────────────────────────────────────────────── */
.admin-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}
@media (max-width: 1024px) { .admin-layout { grid-template-columns: 1fr; } }
.admin-sidebar {
  background: var(--c-ink);
  color: #fff;
  padding: var(--sp-6) 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
@media (max-width: 1024px) { .admin-sidebar { display: none; } }
.admin-logo {
  padding: 0 var(--sp-6) var(--sp-6);
  border-bottom: 1px solid rgba(255,255,255,.1);
  margin-bottom: var(--sp-4);
}
.admin-nav-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-6);
  color: rgba(255,255,255,.65);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--t-base);
  text-decoration: none;
}
.admin-nav-item:hover { background: rgba(255,255,255,.08); color: #fff; }
.admin-nav-item.active { background: var(--c-primary); color: #fff; }
.admin-nav-item .material-icons-round { font-size: 20px; }
.admin-nav-section {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: rgba(255,255,255,.3);
  padding: var(--sp-5) var(--sp-6) var(--sp-2);
}
.admin-content { padding: var(--sp-8); background: var(--c-surface); min-height: 100vh; }
@media (max-width: 768px) { .admin-content { padding: var(--sp-4); } }

/* Data table */
.data-table-wrap { background: var(--c-surface-2); border-radius: var(--r-lg); box-shadow: var(--shadow-sm); overflow-x: auto; -webkit-overflow-scrolling: touch; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
  background: var(--c-surface);
  padding: var(--sp-3) var(--sp-4);
  text-align: left;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--c-ink-muted);
  border-bottom: 1px solid var(--c-border);
}
.data-table td {
  padding: var(--sp-4);
  border-bottom: 1px solid var(--c-border);
  font-size: var(--text-sm);
  color: var(--c-ink-light);
  vertical-align: middle;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--c-surface); }
.table-actions { display: flex; gap: var(--sp-2); }

/* Status badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 3px var(--sp-3);
  border-radius: var(--r-full);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.status-badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.status-published, .status-active, .status-success { background: var(--c-success-light); color: #0a7a58; }
.status-draft, .status-pending   { background: var(--c-warning-light); color: #92400e; }
.status-archived, .status-expired { background: var(--c-error-light); color: #7f1d1d; }

/* ── Pagination ──────────────────────────────────────────────────────────────── */
.pagination { display: flex; gap: var(--sp-2); justify-content: center; margin-top: var(--sp-8); flex-wrap: wrap; }
.page-btn {
  min-width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-md);
  font-size: var(--text-sm);
  font-weight: 600;
  border: 2px solid var(--c-border);
  color: var(--c-ink-light);
  transition: all var(--t-base);
  font-family: var(--font-latin);
}
.page-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }
.page-btn.active { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }
.page-ellipsis { display: flex; align-items: center; height: 40px; color: var(--c-ink-muted); }

/* ── Bottom nav (mobile) ─────────────────────────────────────────────────────── */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-h);
  background: var(--c-surface-2);
  border-top: 1px solid var(--c-border);
  z-index: 900;
  box-shadow: 0 -4px 16px rgba(0,0,0,.08);
}
@media (max-width: 768px) { .bottom-nav { display: flex; } }
.bottom-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  text-decoration: none;
  color: var(--c-ink-muted);
  font-size: 10px;
  font-weight: 600;
  padding: var(--sp-2) 0;
  transition: color var(--t-base);
}
.bottom-nav-item .material-icons-round { font-size: 22px; }
.bottom-nav-item.active, .bottom-nav-item:hover { color: var(--c-primary); }
body:has(.bottom-nav) .main-content { padding-bottom: var(--bottom-nav-h); }

/* ── Footer ──────────────────────────────────────────────────────────────────── */
.footer {
  background: var(--c-ink);
  color: rgba(255,255,255,.7);
  padding: var(--sp-16) 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--sp-8);
  margin-bottom: var(--sp-10);
}
@media (max-width: 1024px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px)  { .footer-grid { grid-template-columns: 1fr; } }

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  text-decoration: none;
  color: #fff;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  margin-bottom: var(--sp-4);
}
.footer-tagline { font-size: var(--text-lg); color: rgba(255,255,255,.85); font-weight: 600; margin-bottom: var(--sp-3); }
.footer-desc { font-size: var(--text-sm); line-height: 1.7; margin-bottom: var(--sp-5); }
.footer-socials { display: flex; gap: var(--sp-3); }
.social-link {
  width: 36px;
  height: 36px;
  border-radius: var(--r-full);
  background: rgba(255,255,255,.1);
  color: rgba(255,255,255,.7);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--t-base);
}
.social-link:hover { background: var(--c-primary); color: #fff; }

.footer-heading {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: #fff;
  margin-bottom: var(--sp-4);
}
.footer-links { display: flex; flex-direction: column; gap: var(--sp-3); }
.footer-links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,.6);
  transition: color var(--t-base);
}
.footer-links a:hover { color: #fff; }
.footer-contact { font-size: var(--text-sm); color: rgba(255,255,255,.6); margin-bottom: var(--sp-2); }

.footer-app {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-5) 0;
  border-top: 1px solid rgba(255,255,255,.1);
  flex-wrap: wrap;
  font-size: var(--text-sm);
}
.app-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--r-full);
  border: 1px solid rgba(255,255,255,.2);
  color: rgba(255,255,255,.8);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: all var(--t-base);
}
.app-badge:hover { border-color: var(--c-primary); background: var(--c-primary); color: #fff; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--sp-5) 0;
  border-top: 1px solid rgba(255,255,255,.1);
  font-size: var(--text-sm);
  flex-wrap: wrap;
  gap: var(--sp-3);
}
.footer-made { color: rgba(255,255,255,.4); }

/* ── Chips / Tags ────────────────────────────────────────────────────────────── */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: var(--sp-1) var(--sp-3);
  border-radius: var(--r-full);
  font-size: var(--text-xs);
  font-weight: 600;
  background: var(--c-surface);
  color: var(--c-ink-muted);
  border: 1px solid var(--c-border);
}

/* ── Skeletons ───────────────────────────────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--c-surface) 25%, var(--c-border) 37%, var(--c-surface) 63%);
  background-size: 400px 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: var(--r-sm);
}
@keyframes shimmer {
  0%   { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

/* ── Misc utilities ──────────────────────────────────────────────────────────── */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: .6; }
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.fade-in { animation: fadeIn .4s ease forwards; }

.divider { height: 1px; background: var(--c-border); margin: var(--sp-8) 0; }
.rounded-full { border-radius: var(--r-full) !important; }
.overflow-hidden { overflow: hidden; }
.relative { position: relative; }
.w-full { width: 100%; }
.cursor-pointer { cursor: pointer; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* Demo OTP box */
.demo-otp-box {
  background: var(--c-warning-light);
  border: 2px dashed var(--c-warning);
  border-radius: var(--r-md);
  padding: var(--sp-4);
  text-align: center;
  margin-top: var(--sp-4);
  font-size: var(--text-sm);
}
.demo-otp-box strong {
  font-family: var(--font-latin);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--c-ink);
  display: block;
  letter-spacing: 0.3em;
  margin-top: var(--sp-2);
}

/* Enroll sticky bar */
.enroll-sticky {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--c-surface-2);
  border-top: 1px solid var(--c-border);
  padding: var(--sp-3) var(--sp-4);
  z-index: 800;
  box-shadow: 0 -4px 20px rgba(0,0,0,.10);
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
}
@media (max-width: 768px) { .enroll-sticky { display: flex; } }
.enroll-sticky-price { font-family: var(--font-latin); font-size: var(--text-xl); font-weight: 800; color: var(--c-primary); }

/* Breadcrumb */
.breadcrumb { display: flex; align-items: center; gap: var(--sp-2); font-size: var(--text-sm); color: var(--c-ink-muted); flex-wrap: wrap; margin-bottom: var(--sp-4); }
.breadcrumb a { color: var(--c-ink-muted); }
.breadcrumb a:hover { color: var(--c-primary); }
.breadcrumb-sep { color: var(--c-border); }

/* Tabs */
.tabs { display: flex; border-bottom: 2px solid var(--c-border); gap: 0; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab-btn {
  padding: var(--sp-3) var(--sp-5);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--c-ink-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
  transition: all var(--t-base);
  cursor: pointer;
}
.tab-btn:hover { color: var(--c-primary); }
.tab-btn.active { color: var(--c-primary); border-bottom-color: var(--c-primary); }
.tab-panel { display: none; padding: var(--sp-6) 0; }
.tab-panel.active { display: block; }

/* ── Responsive adjustments ──────────────────────────────────────────────────── */
.main-content { padding-top: 0; }
@media (max-width: 768px) {
  .section { padding: var(--sp-10) 0; }
  .section-sm { padding: var(--sp-8) 0; }
  .hero-actions { gap: var(--sp-3); }
  .hero-actions .btn { width: 100%; }
}

/* =============================================================================
   B ACADEMY — Extended Styles v2.0
   New components: success-stories, leaderboard, profile, exam-center
   ============================================================================= */

/* ── Extra spacing token ─────────────────────────────────────────────────────── */
:root {
  --sp-7:  1.75rem;
  --r-2xl: 32px;
  --c-primary-light-border: rgba(90,60,240,.2);
  --c-warning-light: #FFFBEB;
}

/* ── Btn extras ─────────────────────────────────────────────────────────────── */
.btn-white { background:#fff; color:var(--c-primary); border:1px solid rgba(255,255,255,.3); }
.btn-white:hover { background:rgba(255,255,255,.9); }
.btn-warning { background:var(--c-warning); color:#fff; border:none; }
.btn-warning:hover { background:#D97706; }
.btn-success { background:var(--c-success); color:#fff; border:none; }
.btn-success:hover { background:#0FA574; }
.btn-block { width:100%; justify-content:center; }
.btn-lg { padding:14px 28px; font-size:var(--text-base); }

/* ── Progress bar ────────────────────────────────────────────────────────────── */
.progress-bar {
  height: 6px;
  border-radius: 999px;
  background: var(--c-border);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-primary-2));
  transition: width .4s ease;
}

/* ── Status badges ───────────────────────────────────────────────────────────── */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 700;
}
.status-active   { background: var(--c-success-light); color: var(--c-success); }
.status-archived { background: var(--c-error-light);   color: var(--c-error); }
.status-pending  { background: var(--c-warning-light); color: var(--c-warning); }
.status-draft    { background: var(--c-surface);       color: var(--c-ink-muted); }

/* ── View-all link ───────────────────────────────────────────────────────────── */
.view-all-link {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--c-primary);
  text-decoration: none;
  transition: opacity var(--t-fast);
}
.view-all-link:hover { opacity: .75; }

/* ── Success Stories ─────────────────────────────────────────────────────────── */
.stories-section {
  padding: var(--sp-16) 0;
  background: linear-gradient(180deg, #F8F5FF 0%, #fff 100%);
  position: relative;
  overflow: hidden;
}
.stories-section::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 800px; height: 400px;
  background: radial-gradient(ellipse, rgba(90,60,240,.06) 0%, transparent 70%);
  pointer-events: none;
}
.stories-scroll {
  display: flex;
  gap: var(--sp-5);
  overflow-x: auto;
  padding-bottom: var(--sp-4);
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--c-border) transparent;
  -webkit-overflow-scrolling: touch;
}
.stories-scroll::-webkit-scrollbar { height: 4px; }
.stories-scroll::-webkit-scrollbar-track { background: transparent; }
.stories-scroll::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: 2px; }
.story-card {
  flex: 0 0 300px;
  scroll-snap-align: start;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-xl);
  padding: var(--sp-6);
  position: relative;
  transition: transform .2s, box-shadow .2s;
}
.story-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.story-card::before {
  content: '"';
  position: absolute;
  top: var(--sp-4); right: var(--sp-5);
  font-size: 4rem;
  font-family: Georgia, serif;
  color: var(--c-primary-light);
  line-height: 1;
}
.story-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--c-primary-light);
  margin-bottom: var(--sp-4);
}
.story-quote {
  font-size: var(--text-sm);
  color: var(--c-ink-light);
  line-height: 1.8;
  margin-bottom: var(--sp-4);
}
.story-name { font-weight: 800; font-size: var(--text-sm); color: var(--c-ink); }
.story-role { font-size: var(--text-xs); color: var(--c-ink-muted); }
.story-course-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--c-primary-light);
  color: var(--c-primary);
  font-size: 10px;
  font-weight: 700;
  margin-top: var(--sp-2);
}
.story-stars { color: #F59E0B; font-size: var(--text-sm); margin-bottom: var(--sp-2); }

/* ── Section heading component ───────────────────────────────────────────────── */
.section-heading { text-align: center; margin-bottom: var(--sp-10); }
.section-heading-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--c-primary-light);
  color: var(--c-primary);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 700;
  margin-bottom: var(--sp-3);
  letter-spacing: .05em;
}
.section-heading h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin-bottom: var(--sp-3);
}
.section-heading p {
  color: var(--c-ink-muted);
  font-size: var(--text-base);
  max-width: 560px;
  margin: 0 auto;
}

/* ── Leaderboard (course page) ────────────────────────────────────────────────── */
.lb-medal-gold   { color: #F59E0B; }
.lb-medal-silver { color: #9CA3AF; }
.lb-medal-bronze { color: #CD7C2F; }

/* ── Profile two-col responsive ──────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .profile-two-col,
  .teacher-profile-grid,
  .edit-grid { grid-template-columns: 1fr !important; }
}
@media (max-width: 768px) {
  .edit-fields { grid-template-columns: 1fr !important; }
  .exam-info-grid { grid-template-columns: 1fr 1fr !important; }
  .exam-detail-grid { grid-template-columns: 1fr !important; }
  .reviews-grid { grid-template-columns: 1fr !important; }
}

/* ── Micro-animations (Apple-quality) ────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(.94); }
  to   { opacity: 1; transform: scale(1); }
}
.animate-fade-up  { animation: fadeUp  .4s cubic-bezier(.22,1,.36,1) both; }
.animate-fade-in  { animation: fadeIn  .3s ease both; }
.animate-scale-in { animation: scaleIn .3s cubic-bezier(.22,1,.36,1) both; }

/* Stagger children */
.stagger-children > * {
  animation: fadeUp .4s cubic-bezier(.22,1,.36,1) both;
}
.stagger-children > *:nth-child(1) { animation-delay: .05s; }
.stagger-children > *:nth-child(2) { animation-delay: .10s; }
.stagger-children > *:nth-child(3) { animation-delay: .15s; }
.stagger-children > *:nth-child(4) { animation-delay: .20s; }
.stagger-children > *:nth-child(5) { animation-delay: .25s; }
.stagger-children > *:nth-child(6) { animation-delay: .30s; }

/* ── Card hover premium ──────────────────────────────────────────────────────── */
.card {
  transition: box-shadow .25s cubic-bezier(.22,1,.36,1), transform .2s cubic-bezier(.22,1,.36,1);
}
.card:hover {
  box-shadow: 0 8px 40px rgba(90,60,240,.12), 0 2px 8px rgba(0,0,0,.06);
  transform: translateY(-2px);
}

/* ── Gradient text utility ───────────────────────────────────────────────────── */
.gradient-text {
  background: linear-gradient(135deg, var(--c-primary), #C026D3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Glass card variant ──────────────────────────────────────────────────────── */
.glass-card {
  background: rgba(255,255,255,.08);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--r-xl);
}

/* ── Scrollbar global (Webkit) ───────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-ink-faint); }

/* ── Mobile bottom nav ───────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .bottom-nav { padding-bottom: env(safe-area-inset-bottom, 0); }
  .story-card { flex: 0 0 260px; }
  .section-heading h2 { font-size: 1.5rem; }
}

/* ── Accessibility: focus-visible ─────────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
  border-radius: 4px;
}
:focus:not(:focus-visible) { outline: none; }

/* ── Print utility ────────────────────────────────────────────────────────────── */
@media print {
  .navbar, .footer, .mobile-nav, .bottom-nav, .enroll-sticky { display: none !important; }
  .container { max-width: 100%; }
}

/* =============================================================================
   B ACADEMY — Glassmorphism & Motion v3.0
   Liquid glass UI: Apple-quality frosted cards, mesh gradient bg, micro-motion
   ============================================================================= */

/* ── Gradient Mesh Body Background ─────────────────────────────────────────── */
:root {
  --glass-bg:        rgba(255,255,255,0.62);
  --glass-bg-dark:   rgba(13,11,46,0.55);
  --glass-border:    rgba(255,255,255,0.35);
  --glass-shadow:    0 8px 32px rgba(90,60,240,0.14), 0 2px 8px rgba(90,60,240,0.06);
  --glass-blur:      blur(20px) saturate(180%);
  --mesh-1:          radial-gradient(ellipse at 20% 10%,  rgba(174,145,255,0.30) 0%, transparent 55%);
  --mesh-2:          radial-gradient(ellipse at 80% 20%,  rgba(244,114,182,0.22) 0%, transparent 50%);
  --mesh-3:          radial-gradient(ellipse at 10% 80%,  rgba(96,165,250,0.18) 0%, transparent 50%);
  --mesh-4:          radial-gradient(ellipse at 85% 75%,  rgba(90,60,240,0.15) 0%, transparent 50%);
  --c-surface:       #F0ECFF;
  --c-surface-2:     #FFFFFF;
}

body {
  background-color: #F2EEFF;
  background-image: var(--mesh-1), var(--mesh-2), var(--mesh-3), var(--mesh-4);
  background-attachment: fixed;
}

/* ── Glass Card ─────────────────────────────────────────────────────────────── */
.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  box-shadow: var(--glass-shadow);
  transition: transform .25s cubic-bezier(.22,1,.36,1),
              box-shadow .25s cubic-bezier(.22,1,.36,1);
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 48px rgba(90,60,240,0.18), 0 4px 16px rgba(90,60,240,0.08);
}

/* ── Glass Navbar ───────────────────────────────────────────────────────────── */
.navbar {
  background: rgba(255,255,255,0.72) !important;
  backdrop-filter: blur(24px) saturate(200%) !important;
  -webkit-backdrop-filter: blur(24px) saturate(200%) !important;
  border-bottom: 1px solid rgba(90,60,240,0.08) !important;
  box-shadow: 0 2px 20px rgba(90,60,240,0.07) !important;
}
.navbar.scrolled {
  background: rgba(255,255,255,0.90) !important;
  box-shadow: 0 4px 30px rgba(90,60,240,0.12) !important;
}

/* ── Dropdown menus: glass ──────────────────────────────────────────────────── */
.dropdown-menu {
  background: rgba(255,255,255,0.92) !important;
  backdrop-filter: blur(24px) saturate(200%) !important;
  -webkit-backdrop-filter: blur(24px) saturate(200%) !important;
  border: 1px solid rgba(90,60,240,0.10) !important;
  box-shadow: 0 16px 48px rgba(90,60,240,0.16), 0 4px 16px rgba(0,0,0,0.06) !important;
  border-radius: var(--r-xl) !important;
}
.dropdown-menu.open {
  opacity: 1 !important;
  transform: translateY(0) scale(1) !important;
  pointer-events: all !important;
}

/* ── Course cards: glass ────────────────────────────────────────────────────── */
.course-card {
  background: rgba(255,255,255,0.78) !important;
  backdrop-filter: blur(16px) saturate(160%) !important;
  -webkit-backdrop-filter: blur(16px) saturate(160%) !important;
  border: 1px solid rgba(255,255,255,0.55) !important;
  box-shadow: 0 4px 24px rgba(90,60,240,0.10), 0 1px 4px rgba(0,0,0,0.04) !important;
  border-radius: var(--r-xl) !important;
  overflow: hidden;
  transition: transform .25s cubic-bezier(.22,1,.36,1),
              box-shadow .25s cubic-bezier(.22,1,.36,1);
}
.course-card:hover {
  transform: translateY(-5px) scale(1.01);
  box-shadow: 0 24px 64px rgba(90,60,240,0.20), 0 6px 20px rgba(0,0,0,0.06) !important;
}
.course-thumb { position: relative; overflow: hidden; }
.course-thumb img {
  transition: transform .4s cubic-bezier(.22,1,.36,1);
}
.course-card:hover .course-thumb img {
  transform: scale(1.06);
}

/* ── Admin Sidebar: deep glass ───────────────────────────────────────────────── */
.admin-sidebar {
  background: rgba(10,8,40,0.88) !important;
  backdrop-filter: blur(30px) saturate(180%) !important;
  -webkit-backdrop-filter: blur(30px) saturate(180%) !important;
  border-right: 1px solid rgba(255,255,255,0.06) !important;
}

/* ── Stat cards ─────────────────────────────────────────────────────────────── */
.stat-card {
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255,255,255,0.5);
  border-radius: var(--r-xl);
  box-shadow: 0 4px 20px rgba(90,60,240,0.09);
  transition: transform .2s cubic-bezier(.22,1,.36,1), box-shadow .2s;
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(90,60,240,0.15);
}

/* ── Buttons: glass variants ────────────────────────────────────────────────── */
.btn {
  transition: transform .18s cubic-bezier(.22,1,.36,1),
              box-shadow .18s cubic-bezier(.22,1,.36,1),
              background .18s ease,
              border-color .18s ease !important;
}
.btn:active { transform: scale(.96) !important; }

.btn-primary {
  background: linear-gradient(135deg, var(--c-primary), #7C3AED) !important;
  box-shadow: 0 4px 16px rgba(90,60,240,0.35), 0 1px 4px rgba(90,60,240,0.2) !important;
}
.btn-primary:hover {
  transform: translateY(-1px) !important;
  box-shadow: 0 8px 28px rgba(90,60,240,0.45), 0 2px 8px rgba(90,60,240,0.25) !important;
}

.btn-outline {
  background: rgba(90,60,240,0.06) !important;
  backdrop-filter: blur(8px);
  border: 1.5px solid var(--c-primary) !important;
}
.btn-outline:hover {
  background: rgba(90,60,240,0.12) !important;
}

.btn-ghost {
  background: rgba(255,255,255,0.5) !important;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(90,60,240,0.12) !important;
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.8) !important;
  box-shadow: 0 4px 16px rgba(90,60,240,0.10) !important;
}

/* ── Form controls: glass ────────────────────────────────────────────────────── */
.form-control {
  background: rgba(255,255,255,0.7) !important;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1.5px solid rgba(90,60,240,0.12) !important;
  border-radius: var(--r-md) !important;
  transition: border-color .18s, box-shadow .18s, background .18s !important;
}
.form-control:focus {
  background: rgba(255,255,255,0.95) !important;
  border-color: var(--c-primary) !important;
  box-shadow: 0 0 0 4px rgba(90,60,240,0.10) !important;
  outline: none !important;
}

/* ── Hero sections: premium gradient mesh ──────────────────────────────────── */
.hero-section,
[class*="hero"],
[style*="linear-gradient(135deg,#0D0B2E"] {
  position: relative;
  overflow: hidden;
}

/* ── Mobile nav: glass ───────────────────────────────────────────────────────── */
.mobile-nav {
  background: rgba(255,255,255,0.95) !important;
  backdrop-filter: blur(30px) saturate(200%) !important;
  -webkit-backdrop-filter: blur(30px) saturate(200%) !important;
}

/* ── Data table: glass ───────────────────────────────────────────────────────── */
.data-table-wrap {
  background: rgba(255,255,255,0.65) !important;
  backdrop-filter: blur(16px) !important;
  -webkit-backdrop-filter: blur(16px) !important;
  border: 1px solid rgba(255,255,255,0.45) !important;
  border-radius: var(--r-xl) !important;
  overflow-x: auto !important;
  -webkit-overflow-scrolling: touch;
}
.data-table thead tr {
  background: rgba(90,60,240,0.06) !important;
}
.data-table tbody tr:hover {
  background: rgba(90,60,240,0.04) !important;
}

/* ── Floating "sparkle" blobs (decorative) ───────────────────────────────────── */
.blob-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
  animation: floatOrb 8s ease-in-out infinite;
}
@keyframes floatOrb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(20px, -30px) scale(1.05); }
  66%       { transform: translate(-15px, 20px) scale(.96); }
}

/* ── Page entrance animation ─────────────────────────────────────────────────── */
.main-content {
  animation: pageEnter .4s cubic-bezier(.22,1,.36,1) both;
}
@keyframes pageEnter {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Scroll-reveal utility ───────────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s cubic-bezier(.22,1,.36,1), transform .6s cubic-bezier(.22,1,.36,1);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}
.reveal-delay-1 { transition-delay: .08s; }
.reveal-delay-2 { transition-delay: .16s; }
.reveal-delay-3 { transition-delay: .24s; }
.reveal-delay-4 { transition-delay: .32s; }

/* ── Flash alert: glass ──────────────────────────────────────────────────────── */
.alert {
  background: rgba(255,255,255,0.9) !important;
  backdrop-filter: blur(20px) !important;
  -webkit-backdrop-filter: blur(20px) !important;
  border-radius: var(--r-lg) !important;
  border-left: 4px solid var(--c-primary) !important;
  box-shadow: 0 4px 20px rgba(90,60,240,0.12) !important;
}
.alert-success { border-left-color: var(--c-success) !important; }
.alert-error   { border-left-color: var(--c-error) !important; }
.alert-warning { border-left-color: var(--c-warning) !important; }

/* ── Story cards: glass effect ───────────────────────────────────────────────── */
.story-card {
  background: rgba(255,255,255,0.78) !important;
  backdrop-filter: blur(16px) saturate(160%) !important;
  -webkit-backdrop-filter: blur(16px) saturate(160%) !important;
  border: 1px solid rgba(255,255,255,0.5) !important;
  box-shadow: 0 4px 24px rgba(90,60,240,0.09) !important;
}
.story-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 48px rgba(90,60,240,0.18) !important;
}

/* ── Exam cards: glass ───────────────────────────────────────────────────────── */
.exam-card {
  background: rgba(255,255,255,0.76) !important;
  backdrop-filter: blur(16px) !important;
  -webkit-backdrop-filter: blur(16px) !important;
  border: 1px solid rgba(255,255,255,0.5) !important;
}
.exam-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(90,60,240,0.16) !important;
}

/* ── Progress bar: gradient ──────────────────────────────────────────────────── */
.progress-fill {
  background: linear-gradient(90deg, #5A3CF0, #8B6CFF, #A78BFA) !important;
  background-size: 200% 100%;
  animation: progressShine 2s linear infinite;
}
@keyframes progressShine {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Floating action button ──────────────────────────────────────────────────── */
.fab {
  position: fixed;
  bottom: calc(var(--bottom-nav-h) + 16px);
  right: 20px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-primary), #7C3AED);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 24px rgba(90,60,240,0.45);
  cursor: pointer;
  z-index: 100;
  border: none;
  transition: transform .2s cubic-bezier(.22,1,.36,1), box-shadow .2s;
}
.fab:hover { transform: scale(1.08); box-shadow: 0 10px 36px rgba(90,60,240,0.55); }
.fab:active { transform: scale(.94); }

/* ── Tooltip ─────────────────────────────────────────────────────────────────── */
[data-tooltip] { position: relative; }
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(17,20,40,0.92);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 8px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity .15s;
}
[data-tooltip]:hover::after { opacity: 1; }

/* ── Section dividers ────────────────────────────────────────────────────────── */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(90,60,240,0.15), transparent);
  margin: var(--sp-12) 0;
}

/* ── Tag/Badge new variant ───────────────────────────────────────────────────── */
.badge-glass {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(90,60,240,0.09);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(90,60,240,0.15);
  color: var(--c-primary);
  font-size: var(--text-xs);
  font-weight: 700;
}

/* ── Notification dropdown: glass ────────────────────────────────────────────── */
.notif-dropdown {
  background: rgba(255,255,255,0.95) !important;
  backdrop-filter: blur(28px) saturate(200%) !important;
  -webkit-backdrop-filter: blur(28px) saturate(200%) !important;
}
.notif-item.unread {
  background: rgba(90,60,240,0.05) !important;
  border-left: 3px solid var(--c-primary);
}

/* ── Smooth scroll snapping ──────────────────────────────────────────────────── */
@media (prefers-reduced-motion: no-preference) {
  .snap-x { scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch; }
  .snap-start { scroll-snap-align: start; }
}

/* ── Loading shimmer (glass variant) ─────────────────────────────────────────── */
.skeleton {
  background: linear-gradient(
    90deg,
    rgba(255,255,255,0.4) 25%,
    rgba(255,255,255,0.7) 37%,
    rgba(255,255,255,0.4) 63%
  ) !important;
  background-size: 400px 100% !important;
  animation: shimmerGlass 1.6s ease infinite !important;
  backdrop-filter: blur(8px);
}
@keyframes shimmerGlass {
  0%   { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

/* ── Waved section separator ──────────────────────────────────────────────────── */
.wave-top {
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  overflow: hidden;
  line-height: 0;
}
.wave-bottom {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  overflow: hidden;
  line-height: 0;
  transform: rotate(180deg);
}

/* ── Responsive glass nav (mobile) ───────────────────────────────────────────── */
@media (max-width: 768px) {
  body { background-attachment: scroll; }
  .card { border-radius: var(--r-lg) !important; }
  .course-card { border-radius: var(--r-lg) !important; }
}

@media (min-width: 768px) {
  .mobile-nav { display: none !important; }
}