/* ====================================================================
   GURAY SICID LEARNING PLATFORM — PUBLIC WEBSITE STYLESHEET
   Aesthetics: Deep Dark Navy-Blue, Neon Blue/Cyan Accents, Glassmorphism
   ==================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg-dark: #070b14;
  --bg-card: rgba(15, 23, 42, 0.72);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --bg-elevated: #0f172a;
  --bg-glass: rgba(15, 23, 42, 0.65);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(56, 189, 248, 0.28);
  --border-cyan: #38bdf8;
  
  --primary: #0284c7;
  --primary-hover: #0369a1;
  --primary-gradient: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  --cyan-gradient: linear-gradient(135deg, #38bdf8 0%, #06b6d4 100%);
  --accent-cyan: #38bdf8;
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  
  --text-main: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-dim: #475569;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-glow: 0 0 35px rgba(2, 132, 199, 0.3);
  --shadow-cyan-glow: 0 0 40px rgba(56, 189, 248, 0.22);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-elevated: 0 20px 40px -15px rgba(0, 0, 0, 0.7);
  
  --font-main: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-main);
  background-color: var(--bg-dark);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  background-color: var(--bg-dark);
  color: var(--text-main);
  overflow-x: hidden;
  position: relative;
  line-height: 1.6;
}

/* Ambient Background Lights & Grid */
.ambient-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.ambient-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(56, 189, 248, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.03) 1px, transparent 1px);
  background-size: 55px 55px;
  mask-image: radial-gradient(circle at 50% 30%, black 40%, transparent 80%);
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.45;
  animation: orbDrift 18s ease-in-out infinite alternate;
}

.orb-top-left {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(2, 132, 199, 0.35) 0%, transparent 70%);
  top: -150px;
  left: -150px;
}

.orb-top-right {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.28) 0%, transparent 70%);
  top: 10%;
  right: -200px;
  animation-duration: 22s;
  animation-direction: reverse;
}

.orb-center {
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.15) 0%, transparent 70%);
  top: 55%;
  left: 15%;
  animation-duration: 26s;
}

@keyframes orbDrift {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, -30px) scale(1.08); }
  100% { transform: translate(-30px, 40px) scale(0.95); }
}

/* Base Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 10;
}

/* ====================================================================
   NAVIGATION BAR
   ==================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(7, 11, 20, 0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all 0.3s ease;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: var(--text-main);
  transition: opacity 0.2s;
}

.nav-brand:hover {
  opacity: 0.95;
}

.brand-icon-wrap {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(2, 132, 199, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-md);
  box-shadow: 0 0 16px rgba(2, 132, 199, 0.2);
}

.brand-icon-img {
  width: 30px;
  height: 30px;
  display: block;
}

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

.brand-name {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.brand-tag {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-cyan);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

/* Navigation Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s ease;
  position: relative;
  padding: 0.5rem 0;
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--cyan-gradient);
  border-radius: var(--radius-full);
}

/* Right Controls */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.lang-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 0.45rem 0.95rem;
  color: var(--text-main);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: all 0.2s ease;
  font-family: var(--font-main);
}

.lang-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(56, 189, 248, 0.3);
}

.btn-login {
  background: var(--primary-gradient);
  color: #ffffff;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 4px 15px rgba(2, 132, 199, 0.35);
  transition: all 0.25s ease;
}

.btn-login:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(2, 132, 199, 0.5);
  filter: brightness(1.08);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.4rem;
}

/* Mobile Menu Drawer */
.mobile-drawer {
  position: fixed;
  inset: 0;
  background: rgba(7, 11, 20, 0.95);
  backdrop-filter: blur(20px);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  padding: 2rem 1.5rem;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-drawer.open {
  transform: translateX(0);
}

.mobile-drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2.5rem;
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.mobile-nav-link {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  text-decoration: none;
}

/* ====================================================================
   BUTTONS & ACCENTS
   ==================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.8rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all 0.25s ease;
  cursor: pointer;
  border: none;
  font-family: var(--font-main);
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 20px rgba(2, 132, 199, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(2, 132, 199, 0.6);
  filter: brightness(1.1);
}

.btn-cyan {
  background: var(--cyan-gradient);
  color: #082f49;
  font-weight: 800;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 4px 20px rgba(56, 189, 248, 0.4);
}

.btn-cyan:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(56, 189, 248, 0.6);
  filter: brightness(1.05);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1.1rem;
  font-size: 0.84rem;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.42rem 1.15rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: var(--accent-cyan);
  margin-bottom: 1.5rem;
}

.hero-badge-anim {
  animation: floatBadge 3.5s ease-in-out infinite alternate;
  box-shadow: 0 0 22px rgba(56, 189, 248, 0.2), inset 0 0 14px rgba(56, 189, 248, 0.1);
  transition: all 0.3s ease;
}

.hero-badge-anim:hover {
  background: rgba(56, 189, 248, 0.18);
  border-color: rgba(56, 189, 248, 0.6);
  box-shadow: 0 0 28px rgba(56, 189, 248, 0.35);
}

.badge-sparkle {
  display: inline-block;
  font-size: 0.85rem;
  animation: sparkleTwinkle 2.5s ease-in-out infinite;
}

@keyframes sparkleTwinkle {
  0%, 100% { transform: scale(0.9) rotate(0deg); opacity: 0.8; }
  50% { transform: scale(1.25) rotate(15deg); opacity: 1; }
}

@keyframes floatBadge {
  0% { transform: translateY(0); }
  100% { transform: translateY(-4px); }
}

.badge-pill-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.25); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

/* ====================================================================
   HERO SECTION
   ==================================================================== */
.hero-section {
  padding: 5.5rem 0 4.5rem;
  text-align: center;
  position: relative;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto 3.8rem;
}

/* Hero Staggered Entrance Animations */
.hero-content > * {
  animation: heroEntranceFadeUp 0.85s cubic-bezier(0.16, 1, 0.3, 1) backwards;
}
.hero-content > .badge-pill { animation-delay: 0.08s; }
.hero-content > .hero-title { animation-delay: 0.18s; }
.hero-content > .hero-description { animation-delay: 0.32s; }
.hero-content > .hero-ctas { animation-delay: 0.46s; }
.hero-content > .hero-proof { animation-delay: 0.6s; }
.hero-mockup-wrap {
  animation: heroEntranceFadeUp 1s cubic-bezier(0.16, 1, 0.3, 1) 0.72s backwards;
}

@keyframes heroEntranceFadeUp {
  0% {
    opacity: 0;
    transform: translateY(28px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-title {
  font-size: clamp(2.4rem, 5.8vw, 4.2rem);
  font-weight: 850;
  line-height: 1.14;
  letter-spacing: -0.035em;
  margin-bottom: 1.6rem;
  color: #ffffff;
}

.hero-title-prefix {
  display: inline-block;
  background: linear-gradient(180deg, #ffffff 40%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-rotator-wrapper {
  display: inline-block;
  position: relative;
  min-height: 1.2em;
  vertical-align: bottom;
  perspective: 800px;
}

.hero-rotating-word {
  display: inline-block;
  will-change: transform, opacity, filter;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.26s ease, filter 0.26s ease;
}

.text-gradient {
  background: linear-gradient(135deg, #38bdf8 0%, #60a5fa 50%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-shimmer {
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 25%, #c084fc 50%, #38bdf8 75%, #60a5fa 100%);
  background-size: 250% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: textGradientFlow 7s linear infinite;
  filter: drop-shadow(0 0 25px rgba(56, 189, 248, 0.45));
}

@keyframes textGradientFlow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.rotator-flip-out {
  opacity: 0;
  transform: translateY(-24px) rotateX(45deg) scale(0.95);
  filter: blur(5px);
}

.rotator-flip-in {
  animation: rotatorFlipIn 0.32s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes rotatorFlipIn {
  0% {
    opacity: 0;
    transform: translateY(24px) rotateX(-45deg) scale(0.95);
    filter: blur(5px);
  }
  100% {
    opacity: 1;
    transform: translateY(0) rotateX(0deg) scale(1);
    filter: blur(0);
  }
}

.hero-description {
  font-size: clamp(1.08rem, 2.1vw, 1.28rem);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2.75rem;
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
}

.hero-ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 2.25rem;
}

.btn-glow-pulse {
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(56, 189, 248, 0.4), 0 0 0 1px rgba(255, 255, 255, 0.2) inset;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-glow-pulse::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -60%;
  width: 40%;
  height: 200%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.4),
    transparent
  );
  transform: rotate(25deg);
  transition: all 0.65s ease;
}

.btn-glow-pulse:hover::after {
  left: 140%;
}

.btn-glow-pulse:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 30px rgba(56, 189, 248, 0.55), 0 0 25px rgba(56, 189, 248, 0.4);
}

.btn-arrow {
  display: inline-block;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-glow-pulse:hover .btn-arrow {
  transform: translateX(4px);
}

.cta-play-icon {
  transition: transform 0.25s ease;
}

.btn-glow-pulse:hover .cta-play-icon {
  transform: scale(1.2);
}

.hero-proof {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.proof-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.05rem;
  border-radius: var(--radius-full);
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.84rem;
  font-weight: 600;
  color: #cbd5e1;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25);
  transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

.proof-pill:hover {
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.4);
  color: #ffffff;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(2, 132, 199, 0.3);
}

.proof-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #38bdf8;
  box-shadow: 0 0 8px #38bdf8;
}

/* Interactive Hero Preview Mockup */
.hero-mockup-wrap {
  max-width: 1040px;
  margin: 0 auto;
  position: relative;
}

/* Floating Highlight Badges */
.floating-mockup-badge {
  position: absolute;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1.15rem;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-md);
  backdrop-filter: blur(14px);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.5), 0 0 20px rgba(56, 189, 248, 0.15);
  pointer-events: none;
}

.badge-top-left {
  top: -18px;
  left: -20px;
  animation: floatTopLeft 5s ease-in-out infinite alternate;
}

.badge-bottom-right {
  bottom: -18px;
  right: -20px;
  animation: floatBottomRight 5.5s ease-in-out infinite alternate;
}

.float-icon {
  font-size: 1.35rem;
  background: rgba(56, 189, 248, 0.15);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}

.float-meta {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.float-meta strong {
  font-size: 0.85rem;
  color: #ffffff;
  line-height: 1.2;
}

.float-meta small {
  font-size: 0.72rem;
  color: #94a3b8;
}

@keyframes floatTopLeft {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-6px, -10px); }
}

@keyframes floatBottomRight {
  0% { transform: translate(0, 0); }
  100% { transform: translate(6px, 10px); }
}

@media (max-width: 900px) {
  .floating-mockup-badge {
    display: none;
  }
}

.mockup-live-badge {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.75rem;
  color: #38bdf8;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: pulseDot 1.8s infinite;
}

.hero-mockup-glow {
  position: absolute;
  inset: -15px;
  background: radial-gradient(circle at 50% 50%, rgba(2, 132, 199, 0.35) 0%, transparent 75%);
  filter: blur(40px);
  z-index: 1;
}

.mockup-frame {
  position: relative;
  z-index: 2;
  background: var(--bg-elevated);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-elevated), 0 0 0 1px rgba(255, 255, 255, 0.05);
}

.mockup-header-bar {
  background: rgba(15, 23, 42, 0.95);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mockup-dots {
  display: flex;
  gap: 6px;
}

.mockup-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.dot-red { background: #ef4444; }
.dot-amber { background: #f59e0b; }
.dot-green { background: #10b981; }

.mockup-url-bar {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 0.35rem 1.5rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: monospace;
}

/* Mockup Content Grid */
.mockup-content {
  padding: 1.5rem;
  background: #090e1a;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 1.25rem;
  min-height: 440px;
  text-align: left;
}

.mockup-sidebar {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.mockup-sidebar-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

.mockup-sidebar-item.active {
  background: rgba(2, 132, 199, 0.2);
  color: #38bdf8;
  font-weight: 700;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.mockup-main {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.mockup-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.mockup-stat-card {
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.mockup-stat-val {
  font-size: 1.4rem;
  font-weight: 800;
  color: #ffffff;
}

.mockup-stat-lbl {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.mockup-course-banner {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.2) 0%, rgba(15, 23, 42, 0.8) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ====================================================================
   SECTION HEADINGS & LAYOUTS
   ==================================================================== */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-alt {
  background: rgba(15, 23, 42, 0.35);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 4rem;
}

.section-title {
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: #ffffff;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ====================================================================
   FEATURES GRID
   ==================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.75rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--cyan-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-card), 0 0 25px rgba(2, 132, 199, 0.15);
}

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

.feature-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  background: rgba(2, 132, 199, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.25);
  color: var(--accent-cyan);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.75rem;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.feature-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.feature-point {
  font-size: 0.84rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.feature-point svg {
  color: var(--accent-cyan);
  flex-shrink: 0;
}

/* ====================================================================
   COURSES SHOWCASE CARDS
   ==================================================================== */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
}

.course-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.course-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-card), 0 0 30px rgba(56, 189, 248, 0.2);
}

.course-thumb-wrap {
  height: 200px;
  position: relative;
  overflow: hidden;
}

.course-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.course-card:hover .course-thumb {
  transform: scale(1.05);
}

.course-code-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(7, 11, 20, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--accent-cyan);
}

.course-year-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(2, 132, 199, 0.85);
  backdrop-filter: blur(8px);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  color: #ffffff;
}

.course-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.course-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.75rem;
}

.course-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.course-lessons-preview {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.lesson-preview-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-secondary);
  padding: 0.35rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.lesson-preview-item:last-child {
  border-bottom: none;
}

.course-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

.course-prof {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.course-prof-img {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  object-fit: cover;
}

/* ====================================================================
   HOW IT WORKS SECTION
   ==================================================================== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  position: relative;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  position: relative;
  transition: all 0.3s ease;
}

.step-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
}

.step-number {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 1.25rem;
  box-shadow: 0 0 18px rgba(2, 132, 199, 0.4);
}

.step-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.6rem;
}

.step-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ====================================================================
   FAQ ACCORDION
   ==================================================================== */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.25s ease;
}

.faq-item.open {
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  text-align: left;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-main);
}

.faq-icon {
  font-size: 1.25rem;
  transition: transform 0.3s ease;
  color: var(--accent-cyan);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 1.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

.faq-item.open .faq-answer {
  max-height: 250px;
  padding-bottom: 1.25rem;
}

/* ====================================================================
   CALL TO ACTION BANNER
   ==================================================================== */
.cta-banner {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.25) 0%, rgba(37, 99, 235, 0.15) 50%, rgba(15, 23, 42, 0.9) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 4rem 2.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-glow);
}

.cta-banner-content {
  max-width: 680px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

/* ====================================================================
   FOOTER
   ==================================================================== */
.site-footer {
  background: #05080e;
  border-top: 1px solid var(--border-subtle);
  padding: 5rem 0 2.5rem;
  position: relative;
  z-index: 10;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-top: 1rem;
  max-width: 340px;
}

.footer-heading {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-link:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* ====================================================================
   DEMO PAGE SPECIFICS
   ==================================================================== */
.demo-banner-strip {
  background: linear-gradient(90deg, #d97706 0%, #0284c7 100%);
  color: #ffffff;
  padding: 0.65rem 1.5rem;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  text-align: center;
}

.demo-tabs-nav {
  display: flex;
  gap: 0.75rem;
  background: var(--bg-card);
  padding: 0.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  margin-bottom: 2.5rem;
  overflow-x: auto;
}

.demo-tab-btn {
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
  font-family: var(--font-main);
}

.demo-tab-btn.active {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 2px 10px rgba(2, 132, 199, 0.4);
}

/* ====================================================================
   TUTORIALS PAGE SPECIFICS
   ==================================================================== */
.tut-lang-switcher {
  display: inline-flex;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 0.4rem;
  gap: 0.5rem;
  margin-bottom: 3rem;
}

.tut-lang-btn {
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-full);
  font-size: 0.92rem;
  font-weight: 700;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-main);
}

.tut-lang-btn.active {
  background: var(--cyan-gradient);
  color: #082f49;
  font-weight: 800;
}

.tut-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 2rem;
}

.tut-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
}

.tut-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-card);
}

.tut-video-frame {
  position: relative;
  height: 220px;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tut-video-frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tut-badge-lang {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 800;
  background: rgba(7, 11, 20, 0.85);
  border: 1px solid var(--border-subtle);
  color: var(--accent-cyan);
}

/* ====================================================================
   RESPONSIVE MEDIA QUERIES
   ==================================================================== */
@media (max-width: 992px) {
  .nav-links { display: none; }
  .mobile-toggle { display: block; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .mockup-content { grid-template-columns: 1fr; }
  .mockup-sidebar { display: none; }
}

@media (max-width: 640px) {
  .hero-section { padding: 3.5rem 0 2rem; }
  .hero-ctas { flex-direction: column; width: 100%; }
  .hero-ctas .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .mockup-stats-row { grid-template-columns: 1fr; }
  .tut-grid { grid-template-columns: 1fr; }
}

/* ====================================================================
   SCROLL REVEAL & MICRO-ANIMATIONS
   ==================================================================== */
.reveal-item {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: var(--reveal-stagger, 0s);
  will-change: opacity, transform;
}

.reveal-item.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Card Hover Spring & Glow Accents */
.feature-card {
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.35s ease, border-color 0.35s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: rgba(56, 189, 248, 0.45);
  box-shadow: 0 20px 45px rgba(2, 132, 199, 0.22);
}

.feature-icon-box {
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), background 0.3s ease;
}

.feature-card:hover .feature-icon-box {
  transform: scale(1.15) rotate(4deg);
  background: rgba(56, 189, 248, 0.22);
  border-color: rgba(56, 189, 248, 0.5);
}

.course-preview-card {
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.35s ease, border-color 0.35s ease;
}

.course-preview-card:hover {
  transform: translateY(-8px);
  border-color: rgba(56, 189, 248, 0.45);
  box-shadow: 0 20px 45px rgba(2, 132, 199, 0.22);
}

.step-card {
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.35s ease, border-color 0.35s ease;
}

.step-card:hover {
  transform: translateY(-6px);
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 16px 36px rgba(2, 132, 199, 0.2);
}

.cta-banner {
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease;
}

.cta-banner:hover {
  transform: translateY(-4px);
  box-shadow: 0 25px 60px rgba(2, 132, 199, 0.3);
}