/* ==========================================================================
   APPLETREE INFOTECH - PREMIUM TECHNICAL EDUCATION PLATFORM DESIGN SYSTEM
   Modern, High-Performance, Mobile-First, Accessible, Zero-Framework CSS3
   ========================================================================== */

:root {
  /* Brand Color Palette - Deep Luxe Slate & Vibrant High-Tech Glow */
  --color-primary: #0f172a;
  --color-primary-light: #1e293b;
  --color-primary-dark: #070c18;
  --color-primary-muted: #334155;
  
  /* Electric Royal & Sky Accents */
  --color-accent: #0284c7;
  --color-accent-light: #38bdf8;
  --color-accent-hover: #0369a1;
  --color-brand-blue: #2563eb;
  --color-brand-indigo: #4f46e5;
  --color-accent-gradient: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  --color-accent-glow: rgba(14, 165, 233, 0.18);
  
  /* High-Conversion & Status Accents */
  --color-cta: #f97316;
  --color-cta-hover: #ea580c;
  --color-cta-gradient: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
  --color-success: #10b981;
  --color-success-bg: #ecfdf5;
  --color-warning: #f59e0b;
  --color-warning-bg: #fffbeb;
  --color-danger: #ef4444;
  --color-danger-bg: #fef2f2;
  
  /* Neutral Canvas Palette */
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-muted: #f1f5f9;
  --color-surface-hover: #e2e8f0;
  --color-text-main: #0f172a;
  --color-text-muted: #475569;
  --color-text-subtle: #64748b;
  --color-border: #e2e8f0;
  --color-border-subtle: rgba(226, 232, 240, 0.85);
  --color-border-focus: #2563eb;
  
  /* Modern Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  
  /* Container & Radius */
  --container-max: 1240px;
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Layered Modern Elevation Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 2px 4px -1px rgba(15, 23, 42, 0.06), 0 1px 2px -1px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 6px 14px -2px rgba(15, 23, 42, 0.07), 0 2px 6px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 14px 28px -4px rgba(15, 23, 42, 0.09), 0 4px 10px -2px rgba(15, 23, 42, 0.03);
  --shadow-xl: 0 24px 44px -8px rgba(15, 23, 42, 0.12), 0 8px 18px -4px rgba(15, 23, 42, 0.04);
  --shadow-glow: 0 0 24px rgba(37, 99, 235, 0.2);
  
  /* Performance Transitions */
  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 250ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text-main);
  background-color: var(--color-bg);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* Accessible Focus States */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 3px solid var(--color-border-focus);
  outline-offset: 3px;
}

/* Skip Navigation Link */
.skip-to-content {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-primary);
  color: #ffffff;
  padding: var(--space-3) var(--space-5);
  z-index: 9999;
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: top var(--transition-fast);
  text-decoration: none;
  box-shadow: var(--shadow-lg);
}
.skip-to-content:focus {
  top: 1rem;
}

/* Typography Scale */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  font-weight: 800;
  line-height: 1.22;
  margin-bottom: var(--space-4);
  letter-spacing: -0.025em;
}

h1 { font-size: clamp(2rem, 4.5vw + 0.5rem, 3.4rem); letter-spacing: -0.035em; }
h2 { font-size: clamp(1.5rem, 2.5vw + 0.4rem, 2.35rem); margin-top: var(--space-8); }
h3 { font-size: clamp(1.25rem, 1.5vw + 0.3rem, 1.7rem); margin-top: var(--space-6); }
h4 { font-size: 1.2rem; margin-top: var(--space-4); font-weight: 700; }

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-muted);
}

ul, ol {
  margin-bottom: var(--space-5);
  padding-left: var(--space-6);
  color: var(--color-text-muted);
}

li {
  margin-bottom: var(--space-2);
}

strong {
  color: var(--color-text-main);
  font-weight: 700;
}

.hero-section strong,
.hero-card strong,
.section-dark strong,
.top-bar strong,
.site-footer strong,
.location-hero-card strong {
  color: #ffffff;
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1rem, 3vw, 2rem);
  padding-right: clamp(1rem, 3vw, 2rem);
}

/* Header & Top Bar */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border-subtle);
  box-shadow: 0 4px 16px -4px rgba(15, 23, 42, 0.05);
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.top-bar {
  background: linear-gradient(90deg, #070c18 0%, #0f172a 60%, #1e293b 100%);
  color: #cbd5e1;
  padding: 0.55rem 0;
  font-size: 0.85rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.top-bar-location {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: #cbd5e1;
}

@media (max-width: 680px) {
  .top-bar-location {
    display: none;
  }
  .top-bar-inner {
    justify-content: center;
    padding: 0.15rem 0;
  }
}

.top-bar a {
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast);
}

.top-bar a:hover {
  color: var(--color-accent-light);
  text-decoration: none;
}

.top-bar-phone {
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #ffffff !important;
  font-weight: 700 !important;
  letter-spacing: 0.02em;
}

.top-bar-phone:hover {
  background: var(--color-cta);
  border-color: var(--color-cta);
}

.nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 0;
  gap: var(--space-4);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-primary);
}

.brand-logo-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 800;
  font-size: 1.25rem;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.28);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.brand-logo:hover .brand-logo-icon {
  transform: scale(1.05);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: clamp(1.2rem, 2vw, 1.45rem);
  font-weight: 800;
  color: var(--color-primary-dark);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.brand-tagline {
  font-size: 0.725rem;
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 2px;
}

.nav-menu {
  display: none;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 992px) {
  .nav-menu {
    display: flex;
  }
}

.nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text-main);
  text-decoration: none;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--color-accent);
  text-decoration: none;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2.5px;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-full);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

@media (max-width: 480px) {
  .header-actions .btn-cta {
    display: none;
  }
}

.btn-menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--color-text-main);
  transition: all var(--transition-fast);
}

.btn-menu-toggle:hover {
  background: var(--color-surface-muted);
  border-color: var(--color-accent-light);
}

@media (min-width: 992px) {
  .btn-menu-toggle {
    display: none;
  }
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -340px;
  width: min(340px, 88vw);
  height: 100vh;
  background: var(--color-surface);
  box-shadow: var(--shadow-xl);
  z-index: 1000;
  transition: right var(--transition-normal);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.mobile-drawer.open {
  right: 0;
}

.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(7, 12, 24, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.mobile-overlay.open {
  opacity: 1;
  visibility: visible;
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-6);
}

.drawer-close {
  background: var(--color-surface-muted);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.drawer-close:hover {
  background: var(--color-surface-hover);
  color: var(--color-primary-dark);
}

.drawer-links {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-6) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.drawer-links a {
  display: block;
  padding: 0.75rem 1rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-main);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.drawer-links a:hover, .drawer-links a.active {
  background: #f0f9ff;
  color: var(--color-accent);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.6rem;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.25;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  min-height: 46px;
  white-space: nowrap;
}

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

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

.btn-primary {
  background: linear-gradient(135deg, #1e3a8a 0%, #0f172a 100%);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.2);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #2563eb 0%, #1e3a8a 100%);
  color: #ffffff;
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.3);
}

.btn-accent {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
}
.btn-accent:hover {
  background: linear-gradient(135deg, #0369a1 0%, #075985 100%);
  color: #ffffff;
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.45);
}

.btn-cta {
  background: var(--color-cta-gradient);
  color: #ffffff !important;
  box-shadow: 0 4px 14px rgba(249, 115, 22, 0.35);
}
.btn-cta:hover {
  background: linear-gradient(135deg, #ea580c 0%, #c2410c 100%);
  box-shadow: 0 6px 20px rgba(249, 115, 22, 0.45);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-border);
  box-shadow: var(--shadow-xs);
}
.btn-secondary:hover {
  background-color: var(--color-surface-muted);
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: var(--shadow-sm);
}

.btn-outline-white {
  background-color: rgba(255, 255, 255, 0.05);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(8px);
}
.btn-outline-white:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: #ffffff;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-sm {
  padding: 0.45rem 0.95rem;
  font-size: 0.85rem;
  min-height: 38px;
}

.btn-lg {
  padding: 0.95rem 2rem;
  font-size: 1.05rem;
  min-height: 52px;
}

.btn-full {
  width: 100%;
}

@media (max-width: 540px) {
  .header-actions > .btn {
    display: none !important;
  }
}

/* Hero Section */
.hero-section {
  background: 
    radial-gradient(circle at 85% 15%, rgba(56, 189, 248, 0.14) 0%, transparent 45%),
    radial-gradient(circle at 15% 85%, rgba(99, 102, 241, 0.12) 0%, transparent 45%),
    linear-gradient(145deg, #070c18 0%, #0c1736 50%, #081024 100%);
  color: #ffffff;
  padding: clamp(3rem, 7vw, 5.5rem) 0 clamp(4rem, 8vw, 6.5rem) 0;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: center;
}

@media (min-width: 992px) {
  .hero-grid {
    grid-template-columns: 1.25fr 0.85fr;
    gap: var(--space-12);
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  color: #7dd3fc;
  border: 1px solid rgba(255, 255, 255, 0.18);
  margin-bottom: var(--space-4);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.hero-title {
  color: #ffffff;
  font-size: clamp(2.2rem, 4.8vw + 0.5rem, 3.75rem);
  font-weight: 900;
  letter-spacing: -0.035em;
  line-height: 1.14;
  margin-bottom: var(--space-5);
  background: linear-gradient(135deg, #ffffff 40%, #bae6fd 80%, #7dd3fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  color: #cbd5e1;
  font-size: clamp(1.05rem, 1.2vw + 0.4rem, 1.3rem);
  line-height: 1.65;
  margin-bottom: var(--space-8);
  max-width: 660px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.hero-highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

@media (min-width: 640px) {
  .hero-highlights {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
  }
}

.highlight-item {
  display: flex;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 0.85rem;
  backdrop-filter: blur(8px);
}

.highlight-number {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-accent-light);
  line-height: 1.2;
}

.highlight-label {
  font-size: 0.8rem;
  color: #94a3b8;
  margin-top: 2px;
}

.hero-card {
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-xl);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
}

/* Search Bar Component */
.search-section {
  margin-top: -38px;
  position: relative;
  z-index: 20;
}

.search-box-wrapper {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 0.85rem 1.4rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-box-wrapper:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15), var(--shadow-lg);
}

.search-input {
  width: 100%;
  border: none;
  font-size: 1.05rem;
  padding: var(--space-2) 0;
  color: var(--color-text-main);
  background: transparent;
}
.search-input:focus {
  outline: none;
}

/* Breadcrumb Navigation - Responsive & Touch Scrollable */
.breadcrumb-nav {
  padding: 0.85rem 0;
  font-size: 0.875rem;
  color: var(--color-text-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
  margin-bottom: var(--space-8);
  background: var(--color-surface);
}

.breadcrumbs {
  display: flex;
  align-items: center;
  list-style: none;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.breadcrumbs::-webkit-scrollbar {
  display: none;
}

.breadcrumbs li {
  margin-bottom: 0;
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: var(--space-2);
  color: var(--color-text-subtle);
}

.breadcrumbs a {
  color: var(--color-text-muted);
  text-decoration: none;
}
.breadcrumbs a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.breadcrumbs [aria-current="page"] {
  color: var(--color-primary-dark);
  font-weight: 700;
}

/* Responsive Card Grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: clamp(1rem, 2.5vw, 1.75rem);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr));
  gap: clamp(1rem, 2vw, 1.5rem);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 860px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Course Card - Polished SaaS Aesthetic */
.course-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  position: relative;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.course-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.course-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(2, 132, 199, 0.35);
}

.course-card:hover::before {
  opacity: 1;
}

.card-tag {
  align-self: flex-start;
  background: #f0f9ff;
  color: var(--color-accent);
  border: 1px solid #bae6fd;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.725rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

.card-tag.hot {
  background: #fef2f2;
  color: #dc2626;
  border-color: #fecaca;
}

.course-card h3 {
  margin-top: 0;
  margin-bottom: var(--space-2);
  font-size: 1.3rem;
  line-height: 1.3;
}

.course-card h3 a {
  color: var(--color-primary-dark);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.course-card h3 a:hover {
  color: var(--color-accent);
}

.course-card p {
  font-size: 0.95rem;
  line-height: 1.6;
  flex-grow: 1;
  margin-bottom: var(--space-4);
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  font-size: 0.85rem;
  color: var(--color-text-subtle);
}

/* Section Styling */
.section {
  padding: clamp(3rem, 6vw, 5.5rem) 0;
}

.section-muted {
  background-color: var(--color-surface-muted);
}

.section-dark {
  background: linear-gradient(145deg, #070c18 0%, #0c1736 50%, #081024 100%);
  color: #ffffff;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.section-dark h2, .section-dark h3 {
  color: #ffffff;
}
.section-dark p {
  color: #cbd5e1;
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto clamp(2rem, 4vw, 3.5rem) auto;
}

.section-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(2, 132, 199, 0.2);
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}

.section-header h2 {
  margin-top: 0;
  margin-bottom: var(--space-3);
}

.section-header p {
  font-size: 1.1rem;
  color: var(--color-text-muted);
}

/* Sticky Bottom Mobile Bar */
.mobile-sticky-bar {
  display: flex;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid rgba(226, 232, 240, 0.9);
  box-shadow: 0 -8px 24px rgba(15, 23, 42, 0.08);
  z-index: 90;
  padding: 0.65rem 1rem;
  padding-bottom: max(0.65rem, env(safe-area-inset-bottom));
  gap: var(--space-3);
}

@media (min-width: 768px) {
  .mobile-sticky-bar {
    display: none;
  }
}

.mobile-sticky-bar .btn {
  flex: 1;
  font-size: 0.925rem;
  padding: 0.65rem 0.75rem;
  min-height: 44px;
}

/* Training Center Info Box */
.center-info-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 3vw, 2rem);
  box-shadow: var(--shadow-md);
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

.center-info-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: center;
}

@media (min-width: 768px) {
  .center-info-grid {
    grid-template-columns: 1.25fr 0.75fr;
  }
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.info-icon {
  width: 24px;
  height: 24px;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 2px;
}

/* Footer */
.site-footer {
  background: linear-gradient(145deg, #070c18 0%, #0d1733 60%, #070c18 100%);
  color: #94a3b8;
  padding: clamp(3rem, 6vw, 5rem) 0 var(--space-8) 0;
  margin-top: auto;
  font-size: 0.925rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.4fr repeat(4, 1fr);
  }
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1.05rem;
  margin-top: 0;
  margin-bottom: var(--space-4);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 0.55rem;
}

.footer-links a {
  color: #94a3b8;
  text-decoration: none;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
  display: inline-block;
}

.footer-links a:hover {
  color: #ffffff;
  text-decoration: none;
  padding-left: 4px;
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
  justify-content: space-between;
  text-align: center;
  font-size: 0.85rem;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    text-align: left;
  }
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  list-style: none;
  padding: 0;
  margin: 0;
}

/* Utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

@media print {
  .site-header, .site-footer, .btn, .mobile-sticky-bar {
    display: none !important;
  }
  body {
    background: #ffffff;
    color: #000000;
  }
}