/* ============================================
   TECHFLEX INSTITUTE – STYLES.CSS
   Design System: Royal Blue + Teal Gradient
   Fonts: Outfit (headings) + Inter (body)
============================================ */

/* ----------- CSS CUSTOM PROPERTIES ----------- */
:root {
  --blue-900: #0F172A;
  --blue-800: #1E293B;
  --blue-700: #1E40AF;
  --blue-600: #2563EB;
  --blue-500: #3B82F6;
  --blue-400: #60A5FA;
  --teal-500: #0EA5E9;
  --teal-400: #38BDF8;
  --cyan-400: #22D3EE;
  --white: #FFFFFF;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-400: #94A3B8;
  --gray-600: #475569;
  --gray-700: #334155;
  --dark: #020817;
  
  --gradient-primary: linear-gradient(135deg, var(--blue-700) 0%, var(--teal-500) 100%);
  --gradient-dark: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
  --gradient-hero: linear-gradient(135deg, #020817 0%, #0F172A 50%, #0c1a3a 100%);
  
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.3);
  --shadow-lg: 0 15px 50px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 30px rgba(14, 165, 233, 0.25);
  --shadow-blue: 0 8px 32px rgba(37, 99, 235, 0.35);
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ----------- RESET & BASE ----------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--dark);
  color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--blue-900); }
::-webkit-scrollbar-thumb { background: var(--gradient-primary); border-radius: 10px; }

a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 96px 0; }

/* ----------- TYPOGRAPHY ----------- */
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--teal-400);
  padding: 6px 16px;
  border: 1px solid rgba(14, 165, 233, 0.3);
  border-radius: var(--radius-full);
  background: rgba(14, 165, 233, 0.07);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.15;
  margin-bottom: 16px;
  color: var(--white);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--gray-400);
  max-width: 560px;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header .section-subtitle {
  margin: 0 auto;
}

/* ----------- GLASS / UTILITY ----------- */
.glass-card {
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
}

/* ----------- BUTTONS ----------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}

.btn-lg { padding: 16px 36px; font-size: 1rem; }
.btn-sm { padding: 9px 18px; font-size: 0.85rem; }
.btn-full { width: 100%; justify-content: center; }

.btn-primary {
  background: var(--gradient-primary);
  color: var(--white);
  box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(37, 99, 235, 0.5);
}

.btn-glass {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(10px);
  border-color: rgba(255,255,255,0.15);
  color: var(--white);
}
.btn-glass:hover {
  background: rgba(255,255,255,0.12);
  border-color: var(--teal-400);
  transform: translateY(-2px);
}

.btn-outline-nav {
  border: 2px solid rgba(14, 165, 233, 0.5);
  color: var(--teal-400);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
}
.btn-outline-nav:hover {
  background: rgba(14, 165, 233, 0.1);
  border-color: var(--teal-400);
}

.btn-white {
  background: var(--white);
  color: var(--blue-700);
  font-weight: 700;
}
.btn-white:hover {
  background: var(--gray-100);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(255,255,255,0.25);
}

.btn-glass-white {
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(10px);
  border: 2px solid rgba(255,255,255,0.3);
  color: var(--white);
}
.btn-glass-white:hover {
  background: rgba(255,255,255,0.2);
  transform: translateY(-2px);
}

/* ----------- SCROLL REVEAL ----------- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.15s; }
.reveal-delay-2 { transition-delay: 0.3s; }
.reveal-delay-3 { transition-delay: 0.45s; }
.reveal-delay-4 { transition-delay: 0.6s; }

/* ===================================================
   NAVBAR
=================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 18px 0;
  transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(2, 8, 23, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 12px 0;
  box-shadow: 0 4px 30px rgba(0,0,0,0.4);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo img {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
}
/* Full logo image (with built-in text) */
.nav-logo-full {
  width: auto !important;
  height: 44px !important;
  border-radius: 10px !important;
  object-fit: contain !important;
  background: rgba(255,255,255,0.92);
  padding: 3px 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}
.footer-logo .nav-logo-full {
  background: rgba(255,255,255,0.92);
  border-radius: 10px !important;
  padding: 3px 10px;
}
.nav-logo span {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--gray-200);
  letter-spacing: -0.3px;
}
.nav-logo strong {
  color: var(--white);
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-links a {
  color: var(--gray-400);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: var(--radius-full);
  transition: var(--transition);
}
.nav-links a:hover {
  color: var(--white);
  background: rgba(255,255,255,0.07);
}

.nav-cta { flex-shrink: 0; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===================================================
   HERO
=================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--gradient-hero);
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: floatOrb 8s ease-in-out infinite;
}
.orb-1 {
  width: 500px;
  height: 500px;
  background: rgba(37, 99, 235, 0.25);
  top: -100px;
  left: -100px;
  animation-delay: 0s;
}
.orb-2 {
  width: 400px;
  height: 400px;
  background: rgba(14, 165, 233, 0.2);
  top: 30%;
  right: -80px;
  animation-delay: 3s;
}
.orb-3 {
  width: 300px;
  height: 300px;
  background: rgba(124, 58, 237, 0.15);
  bottom: 10%;
  left: 35%;
  animation-delay: 6s;
}

@keyframes floatOrb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(20px, -20px) scale(1.05); }
  66% { transform: translate(-10px, 15px) scale(0.97); }
}

/* Particle canvas */
.particles {
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(circle, rgba(255,255,255,0.08) 1px, transparent 1px),
    radial-gradient(circle, rgba(14, 165, 233, 0.06) 1px, transparent 1px);
  background-size: 60px 60px, 90px 90px;
  background-position: 0 0, 30px 30px;
  animation: particleMove 25s linear infinite;
}
@keyframes particleMove {
  from { background-position: 0 0, 30px 30px; }
  to { background-position: 60px 60px, 90px 90px; }
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-top: 120px;
  padding-bottom: 80px;
  text-align: center;
  max-width: 820px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(14, 165, 233, 0.12);
  border: 1px solid rgba(14, 165, 233, 0.35);
  color: var(--teal-400);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 28px;
  animation: badgePulse 3s ease-in-out infinite;
}
.hero-badge i { color: #FBBF24; }
@keyframes badgePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(14, 165, 233, 0.3); }
  50% { box-shadow: 0 0 0 8px rgba(14, 165, 233, 0); }
}

.hero-title {
  font-size: clamp(3rem, 6vw, 5.2rem);
  font-weight: 900;
  letter-spacing: -2px;
  line-height: 1.05;
  margin-bottom: 24px;
  color: var(--white);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--gray-400);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-xl);
  padding: 24px 40px;
  width: fit-content;
  margin: 0 auto;
}

.hero-stat {
  text-align: center;
  padding: 0 32px;
}
.hero-stat-num {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stat span { 
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--teal-400);
}
.hero-stat p {
  font-size: 0.8rem;
  color: var(--gray-400);
  margin-top: 2px;
}
.hero-stat-divider {
  width: 1px;
  height: 50px;
  background: rgba(255,255,255,0.1);
}

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--gray-400);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: scrollBounce 2s ease-in-out infinite;
}
.scroll-mouse {
  width: 24px;
  height: 38px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}
.scroll-wheel {
  width: 3px;
  height: 8px;
  background: var(--teal-400);
  border-radius: 2px;
  animation: scrollWheel 2s ease-in-out infinite;
}
@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}
@keyframes scrollWheel {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(12px); }
}

/* ===================================================
   MARQUEE
=================================================== */
.marquee-bar {
  background: var(--gradient-primary);
  overflow: hidden;
  padding: 14px 0;
  position: relative;
}
.marquee-track {
  display: flex;
  gap: 48px;
  width: max-content;
  animation: marquee 30s linear infinite;
}
.marquee-track span {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.88rem;
  white-space: nowrap;
  color: rgba(255,255,255,0.9);
  letter-spacing: 0.03em;
}
.marquee-track i { color: rgba(255,255,255,0.7); font-size: 0.6rem; }
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ===================================================
   ABOUT
=================================================== */
.about { background: var(--dark); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.about-card-stack {
  position: relative;
  min-height: 400px;
}

.about-img-card {
  padding: 48px 36px;
  text-align: center;
  position: relative;
}
.about-icon-big {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: white;
  margin: 0 auto 24px;
  box-shadow: var(--shadow-blue);
}
.about-img-card h3 {
  font-size: 1.4rem;
  margin-bottom: 12px;
  color: var(--white);
}
.about-img-card p { color: var(--gray-400); font-size: 0.95rem; }

.about-badge-floating {
  position: absolute;
  background: rgba(255,255,255,0.07);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-full);
  padding: 10px 18px;
  font-size: 0.82rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--white);
  animation: floatBadge 4s ease-in-out infinite;
  box-shadow: var(--shadow-md);
}
.badge-1 { top: -20px; right: -10px; animation-delay: 0s; }
.badge-2 { bottom: 20px; left: -20px; animation-delay: 1.5s; }
.badge-3 { bottom: -20px; right: 20px; animation-delay: 3s; }
.about-badge-floating i { color: var(--teal-400); }

@keyframes floatBadge {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.about-desc {
  color: var(--gray-400);
  font-size: 1.02rem;
  line-height: 1.75;
  margin-bottom: 32px;
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 36px;
}
.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1rem;
  flex-shrink: 0;
}
.about-feature h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 3px;
}
.about-feature p { color: var(--gray-400); font-size: 0.88rem; }

/* ===================================================
   STATS
=================================================== */
.stats-section {
  padding: 64px 0;
  background: linear-gradient(135deg, #0F172A 0%, #1a2744 100%);
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
}
.stat-item {
  text-align: center;
  padding: 32px 20px;
  position: relative;
}
.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: rgba(255,255,255,0.08);
}
.stat-icon {
  width: 56px;
  height: 56px;
  background: var(--gradient-primary);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: white;
  margin: 0 auto 16px;
  box-shadow: var(--shadow-blue);
}
.stat-number {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}
.stat-suffix {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--teal-400);
  display: inline-block;
}
.stat-label {
  color: var(--gray-400);
  font-size: 0.88rem;
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ===================================================
   COURSES
=================================================== */
.courses-section { background: var(--dark); }

.course-filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 48px;
}
.filter-btn {
  padding: 9px 22px;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--gray-400);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  transition: var(--transition);
}
.filter-btn:hover {
  color: var(--white);
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.15);
}
.filter-btn.active {
  background: var(--gradient-primary);
  color: var(--white);
  border-color: transparent;
  box-shadow: var(--shadow-blue);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

/* 3D Flip Card */
.course-card {
  perspective: 1200px;
  height: 320px;
}
.course-card.hidden { display: none; }

.course-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.65s cubic-bezier(0.4, 0, 0.2, 1);
}
.course-card:hover .course-card-inner {
  transform: rotateY(180deg);
}

.course-card-front,
.course-card-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid rgba(255,255,255,0.07);
}

.course-card-front {
  background: linear-gradient(145deg, rgba(30,40,70,0.8) 0%, rgba(15,23,42,0.9) 100%);
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.course-card-back {
  background: var(--gradient-primary);
  transform: rotateY(180deg);
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow: hidden;
}

.course-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--c1), var(--c2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: white;
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.course-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  background: rgba(14, 165, 233, 0.12);
  color: var(--teal-400);
  border: 1px solid rgba(14, 165, 233, 0.25);
  width: fit-content;
}

.course-card-front h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
}
.course-card-front p {
  font-size: 0.82rem;
  color: var(--gray-400);
  line-height: 1.4;
}

.course-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}
.course-topics span {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 10px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--gray-400);
  border-radius: var(--radius-full);
}

.course-cta-hint {
  font-size: 0.75rem;
  color: var(--gray-600);
  display: flex;
  align-items: center;
  gap: 5px;
  animation: hintBlink 2.5s ease-in-out infinite;
}
@keyframes hintBlink {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* Back of card */
.course-card-back h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 4px;
}
.course-card-back ul {
  display: flex;
  flex-direction: column;
  gap: 5px;
  flex: 1;
  overflow: hidden;
}
.course-card-back li {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.9);
  display: flex;
  align-items: center;
  gap: 7px;
}
.course-card-back li i {
  color: rgba(255,255,255,0.6);
  font-size: 0.62rem;
  flex-shrink: 0;
}
.course-card-back .btn {
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.35);
  color: white;
  font-weight: 700;
  margin-top: auto;
  align-self: flex-start;
}
.course-card-back .btn:hover {
  background: rgba(255,255,255,0.35);
  transform: translateY(-2px);
}

.courses-cta { text-align: center; }

/* ===================================================
   WHY US
=================================================== */
.why-us {
  background: linear-gradient(180deg, var(--dark) 0%, #0d1528 100%);
}
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.why-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.why-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: var(--transition);
}
.why-card:hover {
  transform: translateY(-6px);
  border-color: rgba(14, 165, 233, 0.25);
  background: rgba(14, 165, 233, 0.04);
  box-shadow: var(--shadow-glow);
}
.why-card:hover::before { transform: scaleX(1); }

.why-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: white;
  margin-bottom: 20px;
  box-shadow: var(--shadow-blue);
}
.why-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}
.why-card p { color: var(--gray-400); font-size: 0.9rem; line-height: 1.6; }

/* ===================================================
   TESTIMONIALS
=================================================== */
.testimonials {
  background: var(--dark);
  overflow: hidden;
}
.testimonials-slider {
  position: relative;
  overflow: hidden;
}
.testimonial-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.testimonial-card {
  min-width: 100%;
  padding: 48px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-xl);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}
.testimonial-stars {
  display: flex;
  gap: 4px;
  color: #FBBF24;
  font-size: 1rem;
}
.testimonial-card > p {
  font-size: 1.1rem;
  color: var(--gray-300, #CBD5E1);
  line-height: 1.75;
  max-width: 680px;
  font-style: italic;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}
.testimonial-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: white;
}
.testimonial-author strong { display: block; color: var(--white); font-size: 1rem; }
.testimonial-author span { color: var(--gray-400); font-size: 0.85rem; }
.testimonial-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 32px;
}
.testimonial-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.testimonial-btn:hover {
  background: var(--gradient-primary);
  border-color: transparent;
}
.testimonial-dots { display: flex; gap: 8px; }
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  transition: var(--transition);
  cursor: pointer;
}
.dot.active {
  width: 24px;
  border-radius: 4px;
  background: var(--gradient-primary);
}

/* ===================================================
   CTA BANNER
=================================================== */
.cta-banner {
  position: relative;
  overflow: hidden;
  padding: 90px 0;
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
}
.cta-banner-bg { position: absolute; inset: 0; overflow: hidden; }
.cta-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
}
.cta-orb-1 {
  width: 400px; height: 400px;
  background: rgba(37, 99, 235, 0.3);
  left: -100px; top: -100px;
}
.cta-orb-2 {
  width: 350px; height: 350px;
  background: rgba(14, 165, 233, 0.2);
  right: -80px; bottom: -80px;
}
.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
}
.cta-content h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--white);
}
.cta-content p {
  color: var(--gray-400);
  font-size: 1.1rem;
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===================================================
   CONTACT
=================================================== */
.contact { background: var(--dark); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 48px;
  align-items: start;
}
.contact-info-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.ci-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: white;
  flex-shrink: 0;
}
.contact-info-item h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}
.contact-info-item p,
.contact-info-item a {
  color: var(--white);
  font-size: 0.92rem;
  line-height: 1.5;
}
.contact-info-item a:hover { color: var(--teal-400); }

.contact-social {
  display: flex;
  gap: 12px;
}
.social-btn {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: white;
  transition: var(--transition);
}
.social-btn.fb { background: #1877F2; }
.social-btn.ig { background: linear-gradient(135deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888); }
.social-btn.wa { background: #25D366; }
.social-btn:hover { transform: translateY(-3px) scale(1.08); box-shadow: var(--shadow-md); }

/* Form */
.contact-form {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  color: var(--white);
  font-size: 0.95rem;
  transition: var(--transition);
  outline: none;
  appearance: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--gray-600); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--teal-500);
  background: rgba(14, 165, 233, 0.05);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}
.form-group select option {
  background: var(--blue-900);
  color: var(--white);
}
.form-success {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 16px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-md);
  color: #34D399;
  font-weight: 600;
  font-size: 0.95rem;
}
.form-success.show { display: flex; }

/* ===================================================
   FOOTER
=================================================== */
.footer {
  background: #020712;
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 72px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 56px;
}
.footer-brand p {
  color: var(--gray-400);
  font-size: 0.88rem;
  line-height: 1.7;
  margin: 16px 0 24px;
  max-width: 280px;
}
.footer-logo { margin-bottom: 0; }
.footer-social {
  display: flex;
  gap: 12px;
}
.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-400);
  font-size: 0.9rem;
  transition: var(--transition);
}
.footer-social a:hover {
  background: var(--gradient-primary);
  border-color: transparent;
  color: white;
  transform: translateY(-3px);
}
.footer-links-col h4,
.footer-contact-col h4 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}
.footer-links-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links-col a {
  color: var(--gray-400);
  font-size: 0.88rem;
  transition: var(--transition);
}
.footer-links-col a:hover { color: var(--teal-400); padding-left: 6px; }
.footer-contact-col p {
  color: var(--gray-400);
  font-size: 0.85rem;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
  line-height: 1.5;
}
.footer-contact-col i {
  color: var(--teal-400);
  margin-top: 2px;
  flex-shrink: 0;
}
.footer-contact-col a { color: var(--gray-400); }
.footer-contact-col a:hover { color: var(--teal-400); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 24px 0;
  text-align: center;
  color: var(--gray-600);
  font-size: 0.82rem;
}
.footer-bottom i { color: #F472B6; }

/* ===================================================
   RESPONSIVE
=================================================== */
@media (max-width: 1024px) {
  .courses-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-visual { order: -1; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2)::after { display: none; }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    height: 100vh;
    width: 280px;
    background: rgba(2, 8, 23, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 80px 32px;
    gap: 8px;
    transition: right 0.4s ease;
    border-left: 1px solid rgba(255,255,255,0.08);
  }
  .nav-links.open { right: 0; }
  .nav-links a { font-size: 1.1rem; padding: 12px; width: 100%; }
  .hamburger { display: flex; }
  .nav-cta { display: none; }

  .hero-title { font-size: 2.6rem; letter-spacing: -1px; }
  .hero-stats { padding: 20px 24px; }
  .hero-stat { padding: 0 16px; }
  .hero-stat-num { font-size: 1.8rem; }

  .courses-grid { grid-template-columns: 1fr; }
  .course-card { height: 280px; }
  .why-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  .testimonial-card { padding: 32px 24px; }
  .testimonial-card > p { font-size: 0.97rem; }
}

@media (max-width: 480px) {
  .section { padding: 64px 0; }
  .hero-stats { flex-direction: column; gap: 0; width: 100%; border-radius: var(--radius-lg); }
  .hero-stat-divider { height: 1px; width: 60%; }
  .hero-stat { padding: 16px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .cta-actions { flex-direction: column; align-items: center; }
}