/* ============================================================
   Alpha Classes - Modern Education Platform Stylesheet
   Inspired by Unacademy / modern ed-tech platforms
   ============================================================ */

/* --- Custom Properties (Theme Tokens) --- */
:root {
  /* Primary palette */
  --primary: #0d7a6b;
  --primary-light: #0f9484;
  --primary-dark: #0a5c50;
  --primary-2: #0a4a3a;
  --primary-bg: #f0faf7;

  /* Accent / CTA */
  --accent: #f59e0b;
  --accent-hover: #d97706;
  --accent-dark: #b45309;

  /* Neutrals */
  --dark: #0f172a;
  --gray-900: #111827;
  --gray-700: #374151;
  --gray-600: #4b5563;
  --gray-500: #6b7280;
  --gray-400: #9ca3af;
  --gray-300: #d1d5db;
  --gray-200: #e5e7eb;
  --gray-100: #f3f4f6;
  --gray-50: #f9fafb;
  --white: #ffffff;

  /* Semantic */
  --success: #10b981;
  --success-bg: #ecfdf5;
  --success-text: #065f46;
  --danger: #ef4444;
  --danger-bg: #fef2f2;
  --warning-bg: #fffbeb;
  --warning-text: #92400e;
  --info: #6366f1;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08), 0 2px 4px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.1), 0 4px 8px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 48px rgba(15, 23, 42, 0.12);

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.35s ease;

  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

/* --- Global Reset & Base --- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  height: auto;
  overflow: auto;
}

body {
  font-family: var(--font-body);
  line-height: 1.6;
  color: var(--gray-900);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  height: auto;
  overflow: auto;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--gray-900);
  font-weight: 700;
  line-height: 1.25;
}

h2, h3 {
  color: var(--gray-900);
}

p {
  color: var(--gray-600);
}

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

img {
  max-width: 100%;
  height: auto;
}

/* --- Skip Link (Accessibility) --- */
.skip-link {
  position: absolute;
  top: -50px;
  left: 16px;
  background: var(--primary);
  color: var(--white);
  padding: 10px 20px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  z-index: 10000;
  font-weight: 600;
  font-size: 0.875rem;
  transition: top var(--transition-base);
}

.skip-link:focus {
  top: 0;
  color: var(--white);
}

/* --- Focus Styles (Accessibility) --- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

/* --- Navbar --- */
.bg-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%) !important;
}

.navbar {
  box-shadow: 0 2px 16px rgba(13, 122, 107, 0.15);
  padding-top: 0.6rem;
  padding-bottom: 0.6rem;
  backdrop-filter: blur(8px);
  transition: box-shadow var(--transition-base);
}

.navbar .navbar-brand {
  white-space: nowrap;
  margin-right: 0.75rem;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.navbar .navbar-collapse {
  justify-content: flex-end;
}

.navbar .navbar-nav {
  gap: 0;
}

.navbar .nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  white-space: nowrap;
  padding: 0.6rem 0.5rem !important;
  opacity: 0.85;
  transition: opacity var(--transition-fast);
  position: relative;
}

.navbar .nav-link:hover {
  opacity: 1;
}

.navbar .nav-link.active {
  font-weight: 700;
  opacity: 1;
}

.navbar .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0.5rem;
  right: 0.5rem;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
}

@media (min-width: 1200px) {
  .navbar .container-fluid {
    align-items: center;
    flex-wrap: nowrap;
  }
  .navbar .navbar-collapse {
    flex-grow: 1;
    min-width: 0;
  }
  .navbar .navbar-nav {
    flex-wrap: nowrap;
    justify-content: flex-end;
    width: 100%;
  }
}

@media (max-width: 1199.98px) {
  .navbar .navbar-nav {
    padding-top: 0.75rem;
    gap: 2px;
  }
  .navbar .nav-link {
    padding-left: 0 !important;
    padding-right: 0 !important;
    padding-top: 0.5rem !important;
    padding-bottom: 0.5rem !important;
    border-radius: var(--radius-sm);
  }
  .navbar .nav-link:hover {
    background: rgba(255, 255, 255, 0.08);
    padding-left: 0.75rem !important;
  }
  .navbar .nav-link.active::after {
    display: none;
  }
}

/* --- Hero / Header Sections --- */
header.bg-primary,
section.hero,
section.bg-primary {
  position: relative !important;
  height: auto !important;
  min-height: 0 !important;
  max-height: none !important;
  overflow: visible !important;
}

header.bg-primary,
section.hero {
  padding-top: 2rem !important;
  padding-bottom: 2rem !important;
}

header .display-4,
header .display-5,
header .display-6,
section.hero .display-4,
section.hero .display-5,
section.hero .display-6 {
  font-size: clamp(1.75rem, 3vw, 2.5rem) !important;
  line-height: 1.15 !important;
  font-weight: 800 !important;
  letter-spacing: -0.02em;
}

/* Subtle gradient overlay for hero depth */
header.bg-primary::before,
section.hero.bg-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 20%, rgba(255, 255, 255, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

/* --- Cards --- */
.card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  overflow: hidden;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-body {
  padding: 1.5rem;
}

/* --- Buttons --- */
.btn {
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  letter-spacing: 0.01em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover)) !important;
  border-color: var(--accent) !important;
  color: var(--dark) !important;
  font-weight: 700;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-hover), var(--accent-dark)) !important;
  border-color: var(--accent-hover) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

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

.btn-outline-primary {
  color: var(--primary) !important;
  border-color: var(--primary) !important;
  background: transparent !important;
}

.btn-outline-primary:hover {
  background: var(--primary) !important;
  border-color: var(--primary) !important;
  color: var(--white) !important;
  transform: translateY(-1px);
}

.upgrade-cta-btn {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover)) !important;
  border: none !important;
  color: var(--dark) !important;
  font-weight: 700 !important;
  border-radius: var(--radius-full) !important;
  padding: 0.75rem 2rem !important;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
}

.upgrade-cta-btn:hover {
  background: linear-gradient(135deg, var(--accent-hover), var(--accent-dark)) !important;
  color: var(--white) !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
}

/* --- Breadcrumbs --- */
.materials-breadcrumb {
  margin-bottom: 1.75rem;
}

.materials-breadcrumb .breadcrumb {
  margin-bottom: 0;
  background: var(--gray-50);
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.materials-breadcrumb .breadcrumb-item + .breadcrumb-item::before {
  color: var(--gray-400);
}

.materials-breadcrumb .breadcrumb-item a {
  color: var(--primary);
  font-weight: 500;
}

.materials-breadcrumb .breadcrumb-item a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* --- Folder Cards (Materials & Video Browser) --- */
.folder-card {
  position: relative;
  height: 100%;
  padding: 1.5rem 1.25rem;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.folder-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-lg);
}

.folder-card:active {
  transform: translateY(-2px);
}

.folder-card h5 {
  margin-bottom: 0.35rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-900);
}

.folder-card p {
  margin-bottom: 0;
  color: var(--gray-500);
  font-size: 0.85rem;
}

.folder-icon,
.empty-icon {
  display: inline-block;
  font-size: 2.2rem;
  margin-bottom: 0.65rem;
  line-height: 1;
}

.folder-card .premium-badge,
.folder-card .free-badge {
  position: absolute;
  top: 10px;
  right: 10px;
}

/* --- Empty State --- */
.empty-state {
  padding: 3rem 1.5rem;
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius-lg);
  background: var(--gray-50);
  text-align: center;
}

.empty-state h5 {
  color: var(--gray-700);
  margin-bottom: 0.5rem;
}

.empty-state p {
  color: var(--gray-500);
}

/* --- Badges --- */
.premium-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: var(--white);
  font-size: 0.6rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  letter-spacing: 0.6px;
  text-transform: uppercase;
  vertical-align: middle;
  margin-left: 6px;
  line-height: 1.4;
}

.free-badge {
  display: inline-block;
  background: var(--success);
  color: var(--white);
  font-size: 0.6rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  letter-spacing: 0.6px;
  text-transform: uppercase;
  vertical-align: middle;
  margin-left: 6px;
  line-height: 1.4;
}

.free-sample-badge {
  display: inline-block;
  background: var(--info);
  color: var(--white);
  font-size: 0.55rem;
  font-weight: 800;
  padding: 3px 7px;
  border-radius: var(--radius-full);
  letter-spacing: 0.4px;
  text-transform: uppercase;
  vertical-align: middle;
  margin-left: 6px;
  line-height: 1.4;
}

/* LIVE badge with pulsing red dot */
.badge-live {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--danger);
  color: var(--white);
  font-size: 0.6rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  vertical-align: middle;
  margin-left: 6px;
}

.badge-live::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--white);
  border-radius: 50%;
  animation: pulse-dot 1.5s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

/* NEW badge */
.badge-new {
  display: inline-block;
  background: #3b82f6;
  color: var(--white);
  font-size: 0.6rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  vertical-align: middle;
  margin-left: 6px;
}

/* --- Content Gating / Lock Overlay --- */
.content-locked {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
}

.content-locked > *:not(.lock-overlay) {
  filter: blur(5px);
  pointer-events: none;
  user-select: none;
}

.lock-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(2px);
  z-index: 10;
  border-radius: inherit;
}

.lock-overlay-content {
  text-align: center;
  padding: 1.5rem;
}

.lock-icon-large {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  display: block;
}

.lock-message {
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}

/* --- Subscription Banners --- */
.subscription-banner {
  padding: 0.65rem 0;
  font-size: 0.875rem;
  font-weight: 500;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.subscription-banner-active {
  background: var(--success-bg);
  color: var(--success-text);
}

.subscription-banner-free {
  background: var(--warning-bg);
  color: var(--warning-text);
}

.subscription-banner-anon {
  background: var(--gray-100);
  color: var(--gray-700);
}

.banner-icon {
  font-size: 1rem;
  vertical-align: middle;
}

/* Nav subscription badge */
.subscription-badge-nav {
  font-size: 0.7rem !important;
  font-weight: 700;
  padding: 0.2rem 0.55rem !important;
  border-radius: var(--radius-full);
  margin-left: 4px;
  letter-spacing: 0.02em;
}

.subscription-badge-nav.badge-active {
  background: var(--success);
  color: var(--white) !important;
  cursor: default;
}

.subscription-badge-nav.badge-upgrade {
  background: var(--accent);
  color: var(--dark) !important;
}

.nav-subscribe-btn {
  background: var(--accent) !important;
  color: var(--dark) !important;
  border-radius: var(--radius-full) !important;
  font-weight: 700 !important;
  margin-left: 8px !important;
  padding: 0.4rem 1rem !important;
  font-size: 0.85rem !important;
  transition: all var(--transition-fast) !important;
}

.nav-subscribe-btn:hover {
  background: var(--accent-hover) !important;
  transform: translateY(-1px);
}

/* --- Profile Page --- */
.profile-status-card {
  border-left: 4px solid;
  border-radius: var(--radius-md);
  transition: box-shadow var(--transition-base);
}

.profile-status-card:hover {
  transform: none;
}

.profile-status-card.status-active {
  border-left-color: var(--success);
  background: var(--success-bg);
}

.profile-status-card.status-inactive {
  border-left-color: var(--danger);
  background: var(--danger-bg);
}

/* Access cards (profile & homepage) */
.access-card {
  text-align: center;
  padding: 1.25rem 0.75rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.access-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.access-card.unlocked {
  border-color: var(--success);
  background: linear-gradient(180deg, #f0fdf4 0%, var(--white) 100%);
}

.access-card.locked {
  border-color: var(--gray-300);
  background: var(--gray-50);
  opacity: 0.65;
}

.access-card-icon {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
  line-height: 1;
}

/* --- Login Page --- */
#loginTabs .nav-link {
  font-size: 0.9rem;
  color: var(--gray-500);
  font-weight: 500;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 0.5rem 1rem;
  transition: all var(--transition-fast);
}

#loginTabs .nav-link:hover {
  color: var(--primary);
  border-bottom-color: rgba(13, 122, 107, 0.3);
}

#loginTabs .nav-link.active {
  color: var(--primary);
  font-weight: 700;
  border-bottom-color: var(--primary);
  background: transparent;
}

/* Letter spacing for OTP input */
.letter-spacing-2 {
  letter-spacing: 0.5em;
}

/* --- Tables (Admin) --- */
table {
  margin-top: 16px;
}

.table {
  border-radius: var(--radius-md);
  overflow: hidden;
}

.table thead th {
  background: var(--gray-50);
  border-bottom: 2px solid var(--gray-200);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--gray-600);
  padding: 0.85rem 1rem;
}

.table tbody td {
  padding: 0.8rem 1rem;
  vertical-align: middle;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--gray-100);
}

.table-striped > tbody > tr:nth-of-type(odd) > td {
  background: rgba(13, 122, 107, 0.02);
}

/* --- Form Section --- */
.form-section {
  background: var(--gray-50);
  padding: 2rem;
  border-radius: var(--radius-lg);
  margin-top: 2rem;
  border: 1px solid var(--gray-200);
}

.form-control,
.form-select {
  border-radius: var(--radius-sm);
  border-color: var(--gray-300);
  padding: 0.6rem 0.85rem;
  font-size: 0.925rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(13, 122, 107, 0.12);
}

.input-group-text {
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  background: var(--gray-50);
  border-color: var(--gray-300);
  font-weight: 600;
  color: var(--gray-600);
}

/* --- Subscription / Pricing Cards --- */
.pricing-card {
  border-radius: var(--radius-lg);
  border: 2px solid var(--gray-200);
  transition: all var(--transition-base);
  overflow: visible;
}

.pricing-card:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-xl);
  transform: translateY(-6px);
}

.pricing-card.popular {
  border-color: var(--accent);
  box-shadow: 0 8px 32px rgba(245, 158, 11, 0.15);
}

.pricing-card.popular:hover {
  box-shadow: 0 12px 40px rgba(245, 158, 11, 0.25);
}

/* --- Watermark Overlay (Anti-sharing) --- */
.watermark-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998;
  overflow: hidden;
}

.watermark-overlay::before {
  content: attr(data-watermark);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-30deg);
  font-size: 3rem;
  font-weight: 800;
  color: rgba(0, 0, 0, 0.04);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}

/* --- Modal (Upgrade Prompts) --- */
.modal-content {
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

.modal-header {
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
  padding: 1rem 1.5rem;
}

.modal-title {
  font-weight: 700;
  font-size: 1.1rem;
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  border-top: 1px solid var(--gray-200);
  padding: 1rem 1.5rem;
}

/* --- Progress Indicators & Loading --- */
.loading-skeleton {
  background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-200) 50%, var(--gray-100) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.progress-bar-custom {
  height: 6px;
  background: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-custom .progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.spinner-border.text-primary {
  color: var(--primary) !important;
}

/* --- Accordion (FAQ) --- */
.accordion-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md) !important;
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.accordion-button {
  font-weight: 600;
  color: var(--gray-900);
  padding: 1rem 1.25rem;
  font-size: 0.95rem;
}

.accordion-button:not(.collapsed) {
  background: var(--primary-bg);
  color: var(--primary-dark);
  box-shadow: none;
}

.accordion-button:focus {
  box-shadow: none;
  border-color: var(--primary);
}

.accordion-body {
  color: var(--gray-600);
  font-size: 0.925rem;
  line-height: 1.7;
}

/* --- Footer --- */
footer.bg-dark {
  background: var(--dark) !important;
}

footer.bg-dark h5 {
  color: var(--white);
  font-weight: 700;
}

footer.bg-dark p,
footer.bg-dark div {
  color: var(--gray-400);
}

footer.bg-dark a {
  color: rgba(255, 255, 255, 0.85);
  transition: color var(--transition-fast);
}

footer.bg-dark a:hover {
  color: var(--white);
}

footer hr {
  border-color: rgba(255, 255, 255, 0.1);
}

/* --- Utility Classes --- */
.text-primary-custom {
  color: var(--primary) !important;
}

.bg-primary-soft {
  background: var(--primary-bg) !important;
}

.text-accent {
  color: var(--accent) !important;
}

.border-primary-soft {
  border-color: rgba(13, 122, 107, 0.2) !important;
}

.rounded-xl {
  border-radius: var(--radius-xl) !important;
}

.rounded-lg {
  border-radius: var(--radius-lg) !important;
}

/* Gradient text for headings */
.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Section divider */
.section-divider {
  height: 4px;
  width: 48px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: var(--radius-full);
  margin: 0 auto 1.5rem;
}

/* Glass card effect */
.glass-card {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Stat card for hero & homepage */
.stat-highlight {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 1rem;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* --- Responsive Tweaks --- */
@media (max-width: 767.98px) {
  /* Tighter padding on mobile */
  .card-body {
    padding: 1.25rem;
  }

  header.bg-primary,
  section.hero {
    padding-top: 1.5rem !important;
    padding-bottom: 1.5rem !important;
  }

  header .display-4,
  header .display-5,
  header .display-6,
  section.hero .display-4,
  section.hero .display-5,
  section.hero .display-6 {
    font-size: clamp(1.5rem, 5vw, 2rem) !important;
  }

  .folder-card {
    padding: 1.1rem 0.75rem;
  }

  .folder-card h5 {
    font-size: 0.9rem;
  }

  .folder-icon,
  .empty-icon {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
  }

  .empty-state {
    padding: 2rem 1rem;
  }

  .materials-breadcrumb .breadcrumb {
    font-size: 0.8rem;
    padding: 0.5rem 0.75rem;
  }

  .btn-lg {
    padding: 0.65rem 1.25rem;
    font-size: 1rem;
  }
}

@media (max-width: 575.98px) {
  .access-card {
    padding: 0.85rem 0.5rem;
  }

  .access-card-icon {
    font-size: 1.4rem;
  }

  .premium-badge,
  .free-badge,
  .free-sample-badge {
    font-size: 0.5rem;
    padding: 2px 6px;
  }
}

/* --- Animations --- */
@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in-up {
  animation: fade-in-up 0.5s ease-out;
}

/* Smooth hover glow for primary CTA sections */
section.bg-primary .btn-light:hover {
  box-shadow: 0 4px 16px rgba(255, 255, 255, 0.25);
}

/* --- Print Styles --- */
@media print {
  .navbar,
  .skip-link,
  .subscription-banner,
  footer,
  .watermark-overlay {
    display: none !important;
  }

  .card {
    box-shadow: none !important;
    border: 1px solid #ddd !important;
  }

  body {
    font-size: 12pt;
    color: #000;
  }
}