/* ==========================================
   YoYoTuition - Mobile WebView App Stylesheet
   Modern, Touch-Optimized Native Mobile App Experience
   ========================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');
@import url('https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css');

:root {
  --app-primary: #FF5E00;
  --app-primary-hover: #E05200;
  --app-primary-light: #FFF0E6;
  --app-secondary: #4F46E5;
  --app-secondary-light: #EEF2FF;
  --app-dark: #0F172A;
  --app-slate: #475569;
  --app-muted: #94A3B8;
  --app-light-bg: #F8FAFC;
  --app-card-bg: #FFFFFF;
  --app-border: #E2E8F0;
  --app-success: #10B981;
  
  --app-radius-sm: 8px;
  --app-radius-md: 14px;
  --app-radius-lg: 20px;
  --app-radius-full: 9999px;

  --app-shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --app-shadow-md: 0 8px 20px rgba(15, 23, 42, 0.08);
  --app-shadow-lg: 0 16px 32px rgba(15, 23, 42, 0.12);
  --app-shadow-primary: 0 8px 20px rgba(255, 94, 0, 0.25);

  --app-header-height: 60px;
  --app-bottom-nav-height: 64px;
}

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

html, body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif !important;
  background-color: var(--app-light-bg) !important;
  color: var(--app-dark) !important;
  -webkit-tap-highlight-color: transparent;
  -webkit-font-smoothing: antialiased;
  touch-action: manipulation;
  overflow-x: hidden !important;
  margin: 0 !important;
  padding: 0 !important;
}

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

body {
  padding-top: calc(var(--app-header-height) + env(safe-area-inset-top, 0px)) !important;
  padding-bottom: calc(var(--app-bottom-nav-height) + env(safe-area-inset-bottom, 0px) + 20px) !important;
}

.site-wrap {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Native Mobile Top App Header */
.app-top-header {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  height: calc(var(--app-header-height) + env(safe-area-inset-top, 0px)) !important;
  padding-top: env(safe-area-inset-top, 0px) !important;
  background: rgba(255, 255, 255, 0.96) !important;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--app-border) !important;
  z-index: 1030 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  padding-left: 16px !important;
  padding-right: 16px !important;
  transition: all 0.3s ease;
}

.app-brand {
  display: flex !important;
  align-items: center !important;
  gap: 10px !important;
  text-decoration: none !important;
}

.app-brand img {
  height: 36px !important;
  max-height: 36px !important;
  width: auto !important;
  object-fit: contain !important;
}

.app-brand-title {
  font-weight: 800 !important;
  font-size: 1.15rem !important;
  background: linear-gradient(135deg, var(--app-primary), #FF2A00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.3px;
}

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

.app-icon-btn {
  width: 40px !important;
  height: 40px !important;
  border-radius: var(--app-radius-full) !important;
  background: var(--app-light-bg) !important;
  border: 1px solid var(--app-border) !important;
  color: var(--app-dark) !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  font-size: 1.1rem !important;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0 !important;
  text-decoration: none !important;
}

.app-icon-btn:active {
  transform: scale(0.92);
  background: var(--app-primary-light) !important;
  color: var(--app-primary) !important;
}

/* Mobile Side Drawer Overlay */
.app-drawer-overlay {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  background: rgba(15, 23, 42, 0.5) !important;
  backdrop-filter: blur(4px);
  z-index: 1040 !important;
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.app-drawer-overlay.active {
  opacity: 1 !important;
  visibility: visible !important;
  pointer-events: auto !important;
}

.app-drawer {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  width: 285px !important;
  max-width: 82vw !important;
  height: 100vh !important;
  background: var(--app-card-bg) !important;
  z-index: 1050 !important;
  transform: translateX(-100%) !important;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex !important;
  flex-direction: column !important;
  box-shadow: var(--app-shadow-lg) !important;
  padding-top: env(safe-area-inset-top, 0px) !important;
}

.app-drawer.active {
  transform: translateX(0) !important;
}

.app-drawer-header {
  padding: 24px 20px 20px !important;
  background: linear-gradient(135deg, var(--app-primary) 0%, #FF8038 100%) !important;
  color: #fff !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 12px !important;
}

.app-drawer-header img {
  height: 40px !important;
  max-height: 40px !important;
  width: auto !important;
  align-self: flex-start !important;
  filter: brightness(0) invert(1);
  object-fit: contain !important;
}

.app-drawer-header .tagline {
  font-size: 0.85rem !important;
  opacity: 0.9 !important;
  font-weight: 500 !important;
}

.app-drawer-nav {
  padding: 16px 12px !important;
  flex: 1 !important;
  overflow-y: auto !important;
}

.app-drawer-link {
  display: flex !important;
  align-items: center !important;
  gap: 14px !important;
  padding: 12px 16px !important;
  border-radius: var(--app-radius-md) !important;
  color: var(--app-dark) !important;
  font-weight: 600 !important;
  font-size: 0.95rem !important;
  text-decoration: none !important;
  transition: all 0.2s ease;
  margin-bottom: 4px !important;
}

.app-drawer-link i {
  font-size: 1.25rem !important;
  color: var(--app-slate) !important;
  width: 24px !important;
  text-align: center !important;
}

.app-drawer-link:active, .app-drawer-link.active {
  background: var(--app-primary-light) !important;
  color: var(--app-primary) !important;
}

.app-drawer-link:active i, .app-drawer-link.active i {
  color: var(--app-primary) !important;
}

.app-drawer-divider {
  height: 1px !important;
  background: var(--app-border) !important;
  margin: 12px 0 !important;
}

/* Horizontal Scroll Category Pills */
.app-horizontal-scroll {
  display: flex !important;
  flex-wrap: nowrap !important;
  overflow-x: auto !important;
  -webkit-overflow-scrolling: touch !important;
  gap: 10px !important;
  padding-bottom: 8px !important;
  margin-bottom: 20px !important;
  width: 100% !important;
  scrollbar-width: none !important;
  -ms-overflow-style: none !important;
}

.app-horizontal-scroll::-webkit-scrollbar {
  display: none !important;
}

.app-cat-pill {
  flex: 0 0 auto !important;
  padding: 10px 18px !important;
  border-radius: 9999px !important;
  background: #FFFFFF !important;
  border: 1px solid var(--app-border) !important;
  color: #475569 !important;
  font-size: 0.84rem !important;
  font-weight: 700 !important;
  text-decoration: none !important;
  white-space: nowrap !important;
  display: inline-flex !important;
  align-items: center !important;
  gap: 6px !important;
  transition: all 0.2s ease !important;
  cursor: pointer !important;
}

.app-cat-pill.active {
  background: var(--app-primary) !important;
  color: #FFFFFF !important;
  border-color: var(--app-primary) !important;
  box-shadow: var(--app-shadow-primary) !important;
}

/* Fixed Mobile Bottom Navigation Tab Bar */
.app-bottom-nav {
  position: fixed !important;
  bottom: 0 !important;
  left: 0 !important;
  right: 0 !important;
  height: calc(var(--app-bottom-nav-height) + env(safe-area-inset-bottom, 0px)) !important;
  padding-bottom: env(safe-area-inset-bottom, 0px) !important;
  background: rgba(255, 255, 255, 0.96) !important;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--app-border) !important;
  z-index: 1030 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-around !important;
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.04) !important;
}

.app-tab-item {
  flex: 1 !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 3px !important;
  height: 100% !important;
  color: var(--app-muted) !important;
  text-decoration: none !important;
  font-size: 0.72rem !important;
  font-weight: 600 !important;
  transition: all 0.2s ease;
  position: relative !important;
}

.app-tab-item i {
  font-size: 1.35rem !important;
  transition: transform 0.2s ease;
}

.app-tab-item.active {
  color: var(--app-primary) !important;
}

.app-tab-item.active i {
  transform: translateY(-2px);
}

.app-tab-item.active::after {
  content: '' !important;
  position: absolute !important;
  top: 0 !important;
  width: 24px !important;
  height: 3px !important;
  background: var(--app-primary) !important;
  border-radius: 0 0 4px 4px !important;
}

.app-tab-item:active {
  transform: scale(0.92);
}

/* Mobile Hero Component */
.app-hero-card {
  background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 50%, #31103F 100%) !important;
  border-radius: var(--app-radius-lg) !important;
  padding: 32px 24px !important;
  color: #fff !important;
  position: relative !important;
  overflow: hidden !important;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.25) !important;
  margin-bottom: 24px !important;
  border: 1px solid rgba(255, 255, 255, 0.1) !important;
}

.app-hero-card::before {
  content: '' !important;
  position: absolute !important;
  top: -40% !important;
  right: -25% !important;
  width: 320px !important;
  height: 320px !important;
  background: radial-gradient(circle, rgba(255,94,0,0.45) 0%, rgba(255,94,0,0) 70%) !important;
  border-radius: 50% !important;
  pointer-events: none !important;
}

.app-hero-card::after {
  content: '' !important;
  position: absolute !important;
  bottom: -30% !important;
  left: -20% !important;
  width: 280px !important;
  height: 280px !important;
  background: radial-gradient(circle, rgba(79,70,229,0.4) 0%, rgba(79,70,229,0) 70%) !important;
  border-radius: 50% !important;
  pointer-events: none !important;
}

.app-hero-badge-wrap {
  display: flex !important;
  flex-wrap: wrap !important;
  gap: 8px !important;
  margin-bottom: 16px !important;
}

.app-hero-badge {
  display: inline-flex !important;
  align-items: center !important;
  gap: 6px !important;
  padding: 6px 14px !important;
  background: rgba(255, 94, 0, 0.22) !important;
  border: 1px solid rgba(255, 94, 0, 0.45) !important;
  color: #FF9E66 !important;
  font-size: 0.82rem !important;
  font-weight: 700 !important;
  border-radius: var(--app-radius-full) !important;
  text-transform: uppercase !important;
  letter-spacing: 0.5px !important;
}

.app-hero-badge.blue-badge {
  background: rgba(99, 102, 241, 0.22) !important;
  border-color: rgba(99, 102, 241, 0.45) !important;
  color: #A5B4FC !important;
}

.app-hero-title {
  font-size: 1.95rem !important;
  font-weight: 800 !important;
  line-height: 1.25 !important;
  margin-bottom: 12px !important;
  color: #FFFFFF !important;
  letter-spacing: -0.5px !important;
}

.app-hero-subtitle {
  font-size: 1rem !important;
  color: #CBD5E1 !important;
  margin-bottom: 24px !important;
  line-height: 1.6 !important;
  max-width: 680px;
}

/* Quick Search Widget inside/under Hero */
.app-quick-search-card {
  background: rgba(255, 255, 255, 0.98) !important;
  border-radius: var(--app-radius-md) !important;
  padding: 18px !important;
  box-shadow: 0 12px 28px rgba(0,0,0,0.12) !important;
  margin-bottom: 24px !important;
  border: 1px solid var(--app-border) !important;
}

.app-quick-search-card label {
  font-size: 0.78rem !important;
  font-weight: 800 !important;
  text-transform: uppercase !important;
  color: var(--app-slate) !important;
  margin-bottom: 6px !important;
  display: block;
}

/* Stats Counter Bar */
.app-stats-bar {
  display: grid !important;
  grid-template-columns: repeat(3, 1fr) !important;
  gap: 12px !important;
  background: #FFFFFF !important;
  border: 1px solid var(--app-border) !important;
  border-radius: var(--app-radius-md) !important;
  padding: 16px 12px !important;
  margin-bottom: 24px !important;
  box-shadow: var(--app-shadow-sm) !important;
  text-align: center !important;
}

.app-stat-item .number {
  font-size: 1.35rem !important;
  font-weight: 800 !important;
  color: var(--app-primary) !important;
  line-height: 1.2 !important;
}

.app-stat-item .label {
  font-size: 0.75rem !important;
  font-weight: 600 !important;
  color: var(--app-slate) !important;
  margin-top: 2px !important;
}

/* Mobile Quick Action Grid */
.app-action-grid {
  display: grid !important;
  grid-template-columns: repeat(2, 1fr) !important;
  gap: 16px !important;
  margin-bottom: 28px !important;
}

.app-action-card {
  background: var(--app-card-bg) !important;
  border: 1.5px solid var(--app-border) !important;
  border-radius: var(--app-radius-md) !important;
  padding: 20px 18px !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: flex-start !important;
  gap: 14px !important;
  text-decoration: none !important;
  color: var(--app-dark) !important;
  box-shadow: var(--app-shadow-sm) !important;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.app-action-card:hover, .app-action-card:active {
  transform: translateY(-4px);
  box-shadow: var(--app-shadow-md) !important;
  border-color: var(--app-primary) !important;
}

.app-action-icon {
  width: 52px !important;
  height: 52px !important;
  border-radius: 14px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  font-size: 1.5rem !important;
  flex-shrink: 0;
}

.app-action-icon.orange {
  background: var(--app-primary-light) !important;
  color: var(--app-primary) !important;
}

.app-action-icon.blue {
  background: var(--app-secondary-light) !important;
  color: var(--app-secondary) !important;
}

.app-action-icon.green {
  background: #E6F4EA !important;
  color: #137333 !important;
}

.app-action-icon.purple {
  background: #F3E8FF !important;
  color: #7E22CE !important;
}

.app-action-title {
  font-weight: 800 !important;
  font-size: 1.05rem !important;
  color: var(--app-dark) !important;
  margin: 0 !important;
  line-height: 1.3 !important;
}

.app-action-desc {
  font-size: 0.84rem !important;
  color: var(--app-slate) !important;
  margin-top: 4px !important;
  margin-bottom: 0 !important;
  line-height: 1.4 !important;
}

/* Mobile Section Header */
.app-section-header {
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  margin-bottom: 16px !important;
}

.app-section-title {
  font-size: 1.3rem !important;
  font-weight: 800 !important;
  color: var(--app-dark) !important;
  margin: 0 !important;
  letter-spacing: -0.3px !important;
}

.app-section-subtitle {
  font-size: 0.88rem !important;
  color: var(--app-slate) !important;
  margin-top: 4px !important;
}

/* Mobile Native Card System */
.app-card {
  background: var(--app-card-bg) !important;
  border: 1px solid var(--app-border) !important;
  border-radius: var(--app-radius-lg) !important;
  padding: 24px 20px !important;
  box-shadow: var(--app-shadow-sm) !important;
  margin-bottom: 24px !important;
}

/* Feature Pillar Cards */
.app-feature-grid {
  display: grid !important;
  grid-template-columns: repeat(1, 1fr) !important;
  gap: 16px !important;
}

.app-feature-card {
  background: #F8FAFC !important;
  border: 1px solid var(--app-border) !important;
  border-radius: var(--app-radius-md) !important;
  padding: 20px !important;
  transition: all 0.25s ease;
}

.app-feature-card:hover {
  background: #FFFFFF !important;
  box-shadow: var(--app-shadow-md) !important;
  border-color: var(--app-primary-light) !important;
}

/* Course Visual Cards Grid */
.app-course-grid {
  display: grid !important;
  grid-template-columns: repeat(2, 1fr) !important;
  gap: 14px !important;
}

.app-course-item-card {
  background: #FFFFFF !important;
  border: 1px solid var(--app-border) !important;
  border-radius: var(--app-radius-md) !important;
  overflow: hidden !important;
  text-decoration: none !important;
  color: var(--app-dark) !important;
  transition: all 0.25s ease;
  display: flex !important;
  flex-direction: column !important;
}

.app-course-item-card:hover, .app-course-item-card:active {
  transform: translateY(-3px);
  box-shadow: var(--app-shadow-md) !important;
  border-color: var(--app-primary) !important;
}

.app-course-item-card img {
  width: 100% !important;
  height: 120px !important;
  object-fit: cover !important;
}

.app-course-item-card .content {
  padding: 12px 14px !important;
}

.app-course-item-card h4 {
  font-size: 0.95rem !important;
  font-weight: 700 !important;
  margin: 0 !important;
  color: var(--app-dark) !important;
}

/* Touch-Optimized Form Controls */
.app-form-group {
  margin-bottom: 18px !important;
}

/* Clean Checkbox Alignment */
.app-checkbox-group {
  display: flex !important;
  align-items: center !important;
  gap: 10px !important;
  margin-top: 16px !important;
  margin-bottom: 24px !important;
}

.app-checkbox-group input[type="checkbox"] {
  width: 20px !important;
  height: 20px !important;
  min-width: 20px !important;
  min-height: 20px !important;
  margin: 0 !important;
  cursor: pointer !important;
  accent-color: var(--app-primary) !important;
  flex-shrink: 0 !important;
}

.app-checkbox-group label {
  margin: 0 !important;
  font-size: 0.9rem !important;
  font-weight: 500 !important;
  color: var(--app-dark) !important;
  cursor: pointer !important;
  user-select: none !important;
  line-height: 1.4 !important;
}

.app-form-label {
  display: block !important;
  font-size: 0.88rem !important;
  font-weight: 700 !important;
  color: var(--app-dark) !important;
  margin-bottom: 8px !important;
}

.app-input-wrapper {
  position: relative !important;
  display: flex !important;
  align-items: center !important;
}

.app-input-icon {
  position: absolute !important;
  left: 14px !important;
  color: var(--app-muted) !important;
  font-size: 1.15rem !important;
  pointer-events: none !important;
}

.app-form-control {
  width: 100% !important;
  min-height: 52px !important;
  padding: 12px 14px 12px 44px !important;
  background: #F8FAFC !important;
  border: 1.5px solid var(--app-border) !important;
  border-radius: var(--app-radius-md) !important;
  font-family: inherit;
  font-size: 0.98rem !important;
  color: var(--app-dark) !important;
  transition: all 0.2s ease;
  appearance: none;
  -webkit-appearance: none;
}

.app-form-control.no-icon {
  padding-left: 14px !important;
}

.app-form-control:focus {
  background: #FFFFFF !important;
  border-color: var(--app-primary) !important;
  box-shadow: 0 0 0 4px rgba(255, 94, 0, 0.12) !important;
  outline: none;
}

select.app-form-control {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2764748B%27 viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E") !important;
  background-repeat: no-repeat !important;
  background-position: right 14px center !important;
  background-size: 14px !important;
  padding-right: 36px !important;
}

/* Touch Buttons */
.app-btn-primary {
  width: 100% !important;
  min-height: 54px !important;
  padding: 14px 20px !important;
  background: linear-gradient(135deg, var(--app-primary) 0%, #FF2A00 100%) !important;
  color: #FFFFFF !important;
  border: none !important;
  border-radius: var(--app-radius-md) !important;
  font-family: inherit;
  font-size: 1.05rem !important;
  font-weight: 700 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 10px !important;
  box-shadow: var(--app-shadow-primary) !important;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none !important;
}

.app-btn-primary:hover, .app-btn-primary:active {
  transform: translateY(-2px) scale(0.99);
  box-shadow: 0 12px 24px rgba(255, 94, 0, 0.35) !important;
  color: #FFFFFF !important;
}

.app-btn-secondary {
  width: 100% !important;
  min-height: 54px !important;
  padding: 14px 20px !important;
  background: var(--app-secondary-light) !important;
  color: var(--app-secondary) !important;
  border: 1.5px solid rgba(79, 70, 229, 0.15) !important;
  border-radius: var(--app-radius-md) !important;
  font-family: inherit;
  font-size: 1.05rem !important;
  font-weight: 700 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 10px !important;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none !important;
}

.app-btn-secondary:hover, .app-btn-secondary:active {
  transform: translateY(-2px);
  background: #E0E7FF !important;
  color: var(--app-secondary) !important;
}

/* Mobile Alert Box */
.app-alert-error {
  background: #FEF2F2 !important;
  border: 1px solid #FCA5A5 !important;
  color: #991B1B !important;
  padding: 14px 16px !important;
  border-radius: var(--app-radius-md) !important;
  font-size: 0.92rem !important;
  font-weight: 600 !important;
  margin-bottom: 20px !important;
  display: flex !important;
  align-items: center !important;
  gap: 10px !important;
}

/* Mobile Banner Carousel Override */
.app-carousel {
  border-radius: var(--app-radius-lg) !important;
  overflow: hidden !important;
  box-shadow: var(--app-shadow-md) !important;
  margin-bottom: 24px !important;
}

.app-carousel .carousel-item img {
  border-radius: var(--app-radius-lg) !important;
  object-fit: cover !important;
  max-height: 280px !important;
  min-height: 180px !important;
  width: 100% !important;
}

/* Responsive Desktop Layout Scaling */
@media (min-width: 768px) {
  .app-hero-title {
    font-size: 2.3rem !important;
  }
  .app-hero-card {
    padding: 40px 36px !important;
  }
  .app-feature-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }
  .app-course-grid {
    grid-template-columns: repeat(4, 1fr) !important;
  }
}

@media (min-width: 992px) {
  body {
    padding-top: 85px !important;
    padding-bottom: 50px !important;
  }
  .container {
    max-width: 1200px !important;
  }
  .app-bottom-nav {
    display: none !important;
  }
  .app-top-header {
    height: 75px !important;
    padding-left: 40px !important;
    padding-right: 40px !important;
  }
  .app-action-grid {
    grid-template-columns: repeat(4, 1fr) !important;
  }
  .app-hero-title {
    font-size: 2.6rem !important;
  }
  .app-carousel .carousel-item img {
    max-height: 380px !important;
  }
}