/* --- CSS Variables (Design System) --- */
:root {
  --primary-blue: #2563EB;
  --primary-blue-hover: #1D4ED8;
  --accent-orange: #F97316;
  --accent-orange-hover: #EA580C;
  --bg-white: #FFFFFF;
  --bg-badge: #EFF6FF;
  --bg-badge-hover: #DBEAFE;
  --text-gray: #475569;
  --text-dark: #0F172A;
  --text-muted: #94A3B8;
  --bg-surface: #F8FAFC;
  --border-gray: #E2E8F0;
  --shadow-card: 0 10px 40px -10px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 20px 40px -10px rgba(0, 0, 0, 0.12);
  --font-main: 'Inter', sans-serif;
  --transition: 0.25s ease;
}

/* --- Base & Reset --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  color: var(--text-gray);
  background-color: var(--bg-white);
  line-height: 1.6;
}

h1, h2, h3, h4, .logo {
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.2;
}

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

a:hover {
  color: var(--primary-blue);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-border {
  border-bottom: 1px solid var(--border-gray);
  padding: 120px 0;
}

.eyebrow {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: var(--primary-blue);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 12px;
}

.hidden-mobile {
  display: block;
}

.relative {
  position: relative;
}

/* Utilities */
.text-center { text-align: center; margin-left: auto; margin-right: auto; }
.mb-2 { margin-bottom: 2rem; }
.mt-4 { margin-top: 4rem; }
.max-w-800 { max-width: 800px; margin-left: auto; margin-right: auto; }

/* --- Global Icons (Lucide) --- */
.lucide {
  width: 28px;
  height: 28px;
  stroke: var(--primary-blue);
  stroke-width: 2;
}
.small-icon {
  width: 16px;
  height: 16px;
  display: inline-block;
  vertical-align: middle;
  margin-right: 4px;
}

/* --- Animations & Motion (Global Rules) --- */
@media (prefers-reduced-motion: no-preference) {
  .fade-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
  }
  .fade-up.visible {
    opacity: 1;
    transform: translateY(0);
  }
  
  .slide-in-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
  }
  .slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
  }

  .slide-in-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
  }
  .slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
  }

  /* Staggers */
  .delay-100 { transition-delay: 100ms; }
  .delay-200 { transition-delay: 200ms; }
  .delay-300 { transition-delay: 300ms; }
  .delay-400 { transition-delay: 400ms; }
  .delay-500 { transition-delay: 500ms; }

  @keyframes floatBadge {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
  }
  .float-badge {
    animation: floatBadge 3s ease-in-out infinite;
  }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-weight: 600;
  border-radius: 8px;
  font-size: 15px;
  letter-spacing: 0.01em;
  transition: all 200ms;
  cursor: pointer;
  text-align: center;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

.btn-primary {
  background-color: var(--primary-blue);
  color: var(--bg-white);
  border: 1px solid var(--primary-blue);
}

.btn-primary:hover {
  background-color: var(--primary-blue-hover);
  border-color: var(--primary-blue-hover);
  color: var(--bg-white);
}
.btn-primary .lucide {
  stroke: var(--bg-white);
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-blue);
  border: 1.5px solid var(--primary-blue);
}

.btn-secondary:hover {
  background-color: var(--primary-blue);
  color: var(--bg-white);
}
.btn-secondary:hover .lucide {
  stroke: var(--bg-white);
}

.full-width-btn {
  width: 100%;
}

.btn-icon .lucide {
  width: 20px;
  height: 20px;
  margin-left: 8px;
  transition: transform 200ms ease;
}
.btn-icon:hover .lucide {
  transform: translateX(4px);
}

/* --- Section Headers --- */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.section-subtitle {
  font-size: 1.125rem;
}

.center-btn {
  text-align: center;
  margin-top: 3rem;
}

/* --- Navbar --- */
.navbar {
  padding: 16px 0;
  border-bottom: 1px solid var(--border-gray);
  position: sticky;
  top: 0;
  background-color: var(--bg-white);
  z-index: 100;
  transition: box-shadow 0.3s ease;
}

.navbar.scrolled {
  box-shadow: 0 1px 16px rgba(0,0,0,0.06);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary-blue);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav-links a:not(.btn) {
  font-weight: 500;
}

.nav-links a:not(.btn):hover {
  color: var(--primary-blue);
}

.hamburger {
  display: none;
  cursor: pointer;
  z-index: 101;
}

.hamburger .lucide {
  stroke: var(--text-dark);
}

/* --- Hero Section --- */
.hero {
  padding: 120px 0 100px 0;
  border-bottom: 1px solid var(--border-gray);
  overflow: hidden;
}

.hero-center {
  padding: 160px 0 100px 0;
  text-align: center;
  border-bottom: 1px solid var(--border-gray);
}
.hero-center .hero-title {
  max-width: 800px;
  margin: 0 auto 1.5rem auto;
}
.hero-center .hero-desc {
  max-width: 700px;
  margin: 0 auto 2rem auto;
}

.hero-container {
  display: flex;
  align-items: center;
  gap: 4rem;
}

.hero-content {
  flex: 1;
}

.hero-title {
  font-size: 64px;
  margin-bottom: 1.5rem;
  line-height: 1.1;
  font-weight: 800;
  max-width: 600px;
}
/* JS animated words */
.hero-word {
  display: inline-block;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}
.hero-word.visible {
  opacity: 1;
  transform: translateY(0);
}

.hero-desc {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  max-width: 600px;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}
.hero-cta.visible {
  opacity: 1;
  transform: translateY(0);
}

.hero .btn {
  padding: 14px 28px;
  font-size: 1.125rem;
}

/* Abstract HTML/CSS Dashboard Mockup */
.hero-illustration {
  flex: 1;
  display: flex;
  justify-content: center;
  position: relative;
  height: 480px;
  perspective: 1000px;
  z-index: 1;
}

.mockup-dashboard {
  width: 100%;
  max-width: 560px;
  height: 400px;
  background: var(--bg-white);
  border: 1px solid var(--border-gray);
  border-radius: 12px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.08);
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 2;
  transform: rotateY(-5deg) rotateX(5deg);
  transform-style: preserve-3d;
}

.mockup-header {
  height: 40px;
  border-bottom: 1px solid var(--border-gray);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
}
.mockup-dots span {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #E5E7EB;
  margin-right: 4px;
}
.mockup-search {
  height: 20px;
  flex: 1;
  background: #F3F4F6;
  border-radius: 4px;
}

.mockup-body {
  display: flex;
  flex: 1;
  padding: 16px;
  gap: 16px;
}

.mockup-sidebar {
  width: 60px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.mockup-nav-item {
  height: 12px;
  background: #F3F4F6;
  border-radius: 4px;
}
.mockup-nav-item.active {
  background: var(--bg-badge);
}

.mockup-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mockup-card {
  border: 1px solid var(--border-gray);
  border-radius: 8px;
  padding: 12px;
}

.mockup-chart-card {
  height: 140px;
  display: flex;
  flex-direction: column;
}

.mockup-title {
  font-size: 10px;
  color: var(--text-gray);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.mockup-chart {
  flex: 1;
  display: flex;
  align-items: flex-end;
  gap: 8px;
}
.mockup-chart .bar {
  flex: 1;
  background: #E5E7EB;
  border-radius: 2px 2px 0 0;
}
.mockup-chart .bar.primary {
  background: var(--primary-blue);
}

.mockup-row-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.mockup-metric {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-dark);
}

.mockup-list {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  justify-content: center;
}
.mockup-list-item {
  display: flex;
  align-items: center;
  gap: 8px;
}
.mockup-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-badge);
}
.mockup-line {
  height: 8px;
  background: #F3F4F6;
  flex: 1;
  border-radius: 4px;
}

/* Floating Badges inside mockup */
.hero-float-badge {
  position: absolute;
  background: white;
  border: 1px solid var(--border-gray);
  padding: 6px 12px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  display: flex;
  align-items: center;
  z-index: 10;
  animation: float 3s ease-in-out infinite;
}

.badge-green { top: -20px; right: 20px; color: #16A34A; animation-delay: 0s; }
.badge-blue { top: 140px; left: -30px; color: #2563EB; animation-delay: 1s; }
.badge-amber { bottom: -20px; right: 40px; color: #F59E0B; animation-delay: 2s; }

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

/* --- Social Proof Bar --- */
.social-proof {
  padding: 2rem 0;
  border-bottom: 1px solid var(--border-gray);
  overflow: hidden;
  position: relative;
  background-color: var(--bg-white);
}

.social-proof::before,
.social-proof::after {
  content: "";
  position: absolute;
  top: 0;
  width: 150px;
  height: 100%;
  z-index: 2;
  pointer-events: none;
}
.social-proof::before {
  left: 0;
  background: linear-gradient(to right, var(--bg-white) 0%, transparent 100%);
}
.social-proof::after {
  right: 0;
  background: linear-gradient(to left, var(--bg-white) 0%, transparent 100%);
}

.marquee-wrapper {
  display: flex;
  width: 100%;
}

.marquee-content {
  display: flex;
  align-items: center;
  gap: 4rem;
  white-space: nowrap;
  animation: marquee 30s linear infinite;
  padding-left: 4rem;
}

.marquee-item {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-gray);
}
.marquee-dot {
  font-size: 15px;
  color: var(--text-gray);
  opacity: 0.5;
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* --- Services --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 3rem;
  align-items: stretch;
}

.service-card {
  border: 1px solid var(--border-gray);
  border-radius: 16px;
  padding: 36px;
  background-color: var(--bg-white);
  transition: transform 0.25s ease, border-color 0.25s ease;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-blue);
}

.service-card:hover .icon-wrapper {
  background-color: var(--bg-badge-hover);
}

.service-card .service-desc {
  flex: 1;
}

.icon-wrapper {
  background-color: var(--bg-badge);
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  transition: background-color 0.25s ease;
}

.service-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

/* --- Stats Section --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  text-align: center;
  margin-top: 3rem;
}

.stats-flex {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4rem 2rem;
  margin-top: 3rem;
  text-align: center;
}
.stats-flex .stat-item {
  flex: 1 1 200px;
  max-width: 250px;
}

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

.stat-number-wrapper {
  display: flex;
  align-items: baseline;
  justify-content: center;
  margin-bottom: 0.5rem;
}

.stat-number, .stat-suffix {
  font-size: 72px;
  font-weight: 800;
  color: var(--primary-blue);
  line-height: 1;
}

.stat-icon {
  margin-left: 8px;
  width: 32px;
  height: 32px;
}

.stat-label {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-dark);
}

.stat-subtext {
  font-size: 0.875rem;
  color: var(--text-gray);
  margin-top: 0.5rem;
}

/* --- How It Works --- */
.timeline-container {
  position: relative;
  margin-top: 3rem;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  position: relative;
  z-index: 1;
}

.timeline-line {
  position: absolute;
  top: 28px;
  left: 0;
  height: 2px;
  width: 0%;
  border-top: 2px dashed var(--primary-blue);
  z-index: 0;
  transition: width 0.8s ease;
}

.timeline-step {
  display: flex;
  flex-direction: column;
  padding-top: 80px;
  position: relative;
  text-align: left;
}

.step-number {
  position: absolute;
  top: 0;
  left: 0;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}
.step-number .lucide {
  width: 24px;
  height: 24px;
  stroke: var(--bg-white);
}

.step-pulse {
  animation: pulse-ring 0.4s ease-out;
}

@keyframes pulse-ring {
  0% { transform: scale(1); }
  50% { transform: scale(1.15); }
  100% { transform: scale(1); }
}

.step-title {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

/* --- Grids (Portfolio, Courses, Blog) --- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4rem;
  align-items: center;
}

.card {
  border: 1px solid var(--border-gray);
  border-radius: 4px;
  background-color: var(--bg-white);
  display: flex;
  flex-direction: column;
  transition: border-color 0.25s ease;
}

.img-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: 4px 4px 0 0;
  height: 200px;
}

.card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.img-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--primary-blue);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.portfolio-card:hover .card-img {
  transform: scale(1.05);
}
.portfolio-card:hover .img-overlay {
  opacity: 0.1;
}

.card-content {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

.card-desc {
  margin-bottom: 1.5rem;
}

.card-content .portfolio-btn {
  margin-top: auto;
}

.tags {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.tag {
  background-color: var(--bg-badge);
  color: var(--primary-blue);
  padding: 0.25rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 20px;
  transform: scale(0.8);
  opacity: 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.tag.visible {
  transform: scale(1);
  opacity: 1;
}

/* Course Specific */
.course-card {
  border-top: 3px solid var(--primary-blue);
}

.play-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 52px;
  height: 52px;
  background-color: rgba(0,0,0,0.35);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease;
}
.play-overlay .lucide {
  width: 24px;
  height: 24px;
  stroke: var(--bg-white);
  fill: var(--bg-white);
}
.course-card:hover .play-overlay {
  transform: translate(-50%, -50%) scale(1.1);
}

.course-meta {
  display: flex;
  margin-bottom: 1rem;
}

.difficulty-badge {
  display: flex;
  align-items: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-dark);
}
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
}
.dot-green { background-color: #10B981; }
.dot-yellow { background-color: #FBBF24; }
.dot-red { background-color: #EF4444; }

.star-icon {
  width: 18px;
  height: 18px;
  stroke: #F59E0B;
  color: #F59E0B; /* for fill="currentColor" */
}

.students-count {
  display: block;
  font-size: 13px;
  color: var(--text-gray);
  margin-top: 4px;
  margin-bottom: 1rem;
}

/* Blog Specific (Live RSS) */
.blog-card {
  transition: border-color 0.25s ease;
}
.blog-card:hover {
  border-color: var(--primary-blue);
}
.blog-title {
  font-size: 1.25rem;
  color: var(--primary-blue);
  transition: color 0.25s ease;
}
.blog-card:hover .blog-title {
  color: var(--text-dark);
}

.blog-date {
  font-size: 0.875rem;
  color: var(--text-gray);
  margin-bottom: 1rem;
}
.blog-excerpt {
  color: var(--text-gray);
  margin-bottom: 1.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.blog-link {
  color: var(--primary-blue);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
}
.blog-link span {
  transition: transform 0.2s ease;
  display: inline-block;
  margin-left: 4px;
}
.blog-card:hover .blog-link span {
  transform: translateX(4px);
}

/* Skeleton Loading Shimmer */
.skeleton-card {
  background: var(--bg-white);
}
.skeleton {
  background: #f0f0f0;
  border-radius: 4px;
  margin-bottom: 12px;
  background-image: linear-gradient(
    90deg,
    #f0f0f0 0px,
    #e0e0e0 40px,
    #f0f0f0 80px
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite linear;
}
.skeleton-title { height: 28px; width: 80%; }
.skeleton-date { height: 16px; width: 40%; margin-bottom: 1rem; }
.skeleton-text { height: 16px; width: 100%; }
.skeleton.short { width: 70%; margin-bottom: 1.5rem; }
.skeleton-link { height: 16px; width: 30%; }

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

/* --- Portfolio Filter Tags --- */
.filter-tags {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.filter-btn {
  background: var(--bg-white);
  color: var(--primary-blue);
  border: 1px solid var(--primary-blue);
  padding: 8px 20px;
  border-radius: 30px;
  font-weight: 500;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition);
}

.filter-btn:hover {
  background: #EFF6FF;
}

.filter-btn.active {
  background: var(--primary-blue);
  color: var(--bg-white);
}

/* --- Case Study Layout --- */
.case-studies-list {
  display: flex;
  flex-direction: column;
  gap: 4rem;
  margin-top: 3rem;
}

.case-study-card {
  border: 1px solid var(--border-gray);
  border-radius: 16px;
  background: var(--bg-white);
  overflow: hidden;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.case-study-card.hidden {
  display: none;
}

.case-study-image {
  width: 100%;
  height: 350px;
  object-fit: cover;
  border-bottom: 1px solid var(--border-gray);
}

.case-study-header {
  padding: 2rem 3rem;
  border-bottom: 1px solid var(--border-gray);
  background: var(--bg-badge);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.case-study-title-wrapper {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.case-study-title {
  font-size: 1.75rem;
  color: var(--text-dark);
}

.status-badge {
  background: #10B981;
  color: var(--bg-white);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.case-study-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  padding: 3rem;
}

.case-study-section {
  margin-bottom: 2rem;
}

.case-study-section-title {
  font-size: 1.125rem;
  color: var(--text-dark);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.case-study-list {
  list-style: none;
  padding: 0;
}

.case-study-list li {
  margin-bottom: 0.75rem;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.case-study-list li .lucide {
  width: 20px;
  height: 20px;
  stroke: var(--primary-blue);
  flex-shrink: 0;
  margin-top: 2px;
}

.case-study-tech {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-gray);
  font-weight: 500;
  color: var(--text-dark);
}

/* --- Services Page Layout --- */
.service-deep-dive {
  border: 1px solid var(--border-gray);
  border-radius: 8px;
  background: var(--bg-white);
  padding: 3rem;
  margin-bottom: 3rem;
}

.service-deep-dive:nth-child(even) {
  background: var(--bg-badge);
}

.service-dd-eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-blue);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: block;
}

.service-dd-title {
  font-size: 2rem;
  color: var(--text-dark);
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.service-dd-summary {
  font-size: 1.125rem;
  color: var(--text-gray);
  margin-bottom: 2rem;
}

.service-dd-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.service-dd-subtitle {
  font-size: 1.125rem;
  color: var(--text-dark);
  margin-bottom: 1rem;
  font-weight: 600;
}

.service-dd-list {
  list-style: none;
  padding: 0;
  margin-bottom: 2rem;
}

.service-dd-list li {
  margin-bottom: 0.75rem;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.service-dd-list li .lucide {
  width: 20px;
  height: 20px;
  stroke: var(--primary-blue);
  flex-shrink: 0;
  margin-top: 2px;
}

.service-dd-block {
  margin-bottom: 2rem;
}

/* --- Industries & Tech Stack --- */
.industry-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}

.industry-tag {
  background: var(--bg-white);
  border: 1px solid var(--border-gray);
  color: var(--text-dark);
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tech-stack-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2rem;
}

.tech-stack-row {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 1.5rem;
  border: 1px solid var(--border-gray);
  border-radius: 8px;
  background: var(--bg-white);
}

.tech-stack-category {
  font-weight: 600;
  color: var(--text-dark);
  min-width: 120px;
  font-size: 1.125rem;
}

.tech-stack-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-stack-item {
  background: var(--bg-badge);
  color: var(--text-dark);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 500;
}

/* --- Course Layout --- */
.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

@media (max-width: 992px) {
  .course-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .course-grid {
    grid-template-columns: 1fr;
  }
}

.course-card-compact {
  border: 1px solid var(--border-gray);
  border-radius: 16px;
  background: var(--bg-white);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 250ms ease, border-color 250ms ease;
  height: 100%;
}

.course-card-compact:hover {
  border-color: var(--primary-blue);
  transform: translateY(-4px);
}

.course-card-compact.hidden {
  display: none;
}

.course-thumb-wrapper {
  position: relative;
  height: 200px;
  width: 100%;
}

.course-thumb-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.course-play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  width: 44px;
  height: 44px;
  opacity: 0.9;
  filter: drop-shadow(0 4px 6px rgba(0,0,0,0.3));
}

.course-badge-overlay {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8125rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.dot-beginner { width: 8px; height: 8px; border-radius: 50%; background-color: #10B981; }
.dot-intermediate { width: 8px; height: 8px; border-radius: 50%; background-color: #F59E0B; }
.dot-advanced { width: 8px; height: 8px; border-radius: 50%; background-color: #EF4444; }

.course-card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.course-title-compact {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--primary-blue);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.course-instructor {
  font-size: 0.875rem;
  color: var(--text-gray);
  margin-bottom: 1rem;
}

.course-meta-line {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  color: var(--text-gray);
  margin-bottom: 0.5rem;
}

.course-rating-stars {
  color: #F59E0B;
}

.course-price-compact {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-blue);
  margin-top: auto;
  padding-top: 1.5rem;
  margin-bottom: 1rem;
}

.btn-enroll {
  width: 100%;
  text-align: center;
  justify-content: center;
}

/* --- Contact & Forms --- */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-gray);
  border-radius: 8px;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  color: var(--text-dark);
  background: var(--bg-white);
  transition: border-color var(--transition);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary-blue);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.contact-info-block {
  margin-bottom: 2rem;
}

.contact-info-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 0.25rem;
}

.contact-info-desc {
  color: var(--text-gray);
}

/* --- FAQ --- */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.faq-item {
  margin-bottom: 2rem;
}

.faq-question {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 0.5rem;
}

.faq-answer {
  color: var(--text-gray);
  line-height: 1.6;
}

/* --- Testimonial --- */
.quote-block {
  padding: 2rem;
  background-color: var(--bg-badge);
  border: 1px solid #DBEAFE;
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.quote-mark {
  position: absolute;
  top: 16px;
  left: 20px;
  font-size: 96px;
  color: var(--primary-blue);
  opacity: 0.08;
  font-family: serif;
  z-index: 0;
  line-height: 1;
}

.quote-text {
  font-size: 1.125rem;
  font-style: italic;
  margin-bottom: 1.5rem;
  color: var(--text-dark);
  position: relative;
  z-index: 1;
}

.quote-author {
  display: flex;
  align-items: center;
  position: relative;
  z-index: 1;
}

.avatar-img {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 2px solid var(--bg-white);
  margin-right: 1rem;
}

.author-details {
  display: flex;
  flex-direction: column;
}

.author-details strong {
  color: var(--primary-blue);
  font-size: 15px;
  font-weight: 500;
}

.author-details span {
  font-size: 13px;
  color: var(--text-gray);
  display: block;
}

/* --- Contact Form --- */
.contact-section {
  background-color: var(--bg-white);
}

.contact-bg-pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(var(--bg-badge) 2px, transparent 2px);
  background-size: 24px 24px;
  opacity: 0.6;
  pointer-events: none;
  z-index: 0;
}

.contact-form-wrapper {
  max-width: 560px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  background: var(--bg-white);
  padding: 2rem;
  border-radius: 8px;
  border: 1px solid var(--border-gray);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 500;
  color: var(--text-dark);
}

.form-group input,
.form-group select {
  height: 48px;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-gray);
  border-radius: 4px;
  font-family: var(--font-main);
  font-size: 1rem;
  color: var(--text-dark);
  background-color: var(--bg-white);
  transition: border-color 0.2s ease, outline 0.2s ease, outline-offset 0.2s ease;
  width: 100%;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary-blue);
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.skeleton {
  background: linear-gradient(90deg, #F1F5F9 25%, #E2E8F0 50%, #F1F5F9 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite linear;
  border-radius: 4px;
}

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

.skeleton-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 24px;
  border: 1px solid var(--border-gray);
  border-radius: 16px;
  background: var(--bg-white);
}

.skeleton-title { width: 60%; height: 24px; margin-bottom: 8px; }
.skeleton-date { width: 30%; height: 14px; margin-bottom: 16px; }
.skeleton-text { width: 100%; height: 16px; margin-bottom: 8px; }
.skeleton-text-short { width: 80%; height: 16px; }

select:invalid {
  color: var(--text-gray);
}

.submit-btn {
  transition: background-color 200ms ease;
}

.trust-badge {
  color: var(--text-gray);
  font-size: 0.875rem;
  text-align: center;
  margin-top: 0.5rem;
}

.btn-icon-spin {
  animation: spin 1s linear infinite;
  margin-left: 8px;
  stroke: var(--bg-white);
}

@keyframes spin {
  100% { transform: rotate(360deg); }
}

.hidden { display: none !important; }

/* --- Footer --- */
.footer {
  background-color: var(--bg-badge);
  padding-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 4rem;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-blue);
  margin-bottom: 1rem;
}

.footer-tagline {
  margin-bottom: 1.5rem;
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a {
  color: var(--text-gray);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.footer-social a .lucide {
  width: 20px;
  height: 20px;
  stroke: var(--text-gray);
  transition: stroke 0.2s ease;
}

.footer-social a:hover {
  transform: translateY(-3px);
  background-color: var(--bg-white);
}
.footer-social a:hover .lucide {
  stroke: var(--primary-blue);
}

.footer-heading {
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-contact-info {
  margin-bottom: 0.75rem;
}

.footer-quote-link {
  display: inline-flex;
  margin-top: 0.5rem;
  padding: 6px 16px;
  border-radius: 6px;
  border: 1px solid var(--primary-blue);
  color: var(--primary-blue);
  font-weight: 500;
  transition: background-color 200ms ease, color 200ms ease;
}
.footer-quote-link:hover {
  background-color: var(--primary-blue);
  color: var(--bg-white);
}

.footer-bottom {
  border-top: 1px solid var(--border-gray);
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.875rem;
}

/* --- Responsive --- */
@media (max-width: 992px) {
  .hero-container {
    flex-direction: column;
    text-align: center;
  }
  .hero-desc {
    margin: 0 auto 2rem auto;
  }
  .hero-cta {
    justify-content: center;
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-2, .case-study-body, .service-dd-grid, .faq-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .case-study-header, .case-study-body, .service-deep-dive, .course-card {
    padding: 2rem;
  }
  .tech-stack-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .hidden-mobile {
    display: none;
  }
  .timeline {
    grid-template-columns: 1fr;
  }
  .timeline-line {
    top: 0;
    left: 28px;
    height: 0%;
    width: 2px;
    border-top: none;
    border-left: 2px dashed var(--primary-blue);
    transition: height 0.8s ease;
  }
  .timeline-step {
    padding-top: 0;
    padding-left: 80px;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 250px;
    height: 100vh;
    background-color: var(--bg-white);
    flex-direction: column;
    justify-content: center;
    border-left: 1px solid var(--border-gray);
    transition: 0.3s ease;
    box-shadow: -5px 0 15px rgba(0,0,0,0.05);
  }
  .nav-links.active {
    right: 0;
  }
  .hero-container {
    flex-direction: column-reverse; /* Reverses so image is below text */
  }
  .hero-title {
    font-size: 40px;
  }
  .services-grid, .stats-grid, .grid-3, .grid-2 {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}