@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css");
@import url("https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap");

:root {
  --font-sans: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
  --font-en: 'Outfit', sans-serif;
  
  /* Color Tokens */
  --bg-base: #030712;
  --bg-surface: rgba(17, 24, 39, 0.7);
  --bg-surface-hover: rgba(31, 41, 55, 0.8);
  --bg-card: rgba(15, 23, 42, 0.65);
  --bg-modal: rgba(10, 15, 30, 0.95);
  
  --primary: #3b82f6;
  --primary-glow: rgba(59, 130, 246, 0.4);
  --secondary: #a855f7;
  --secondary-glow: rgba(168, 85, 247, 0.4);
  --accent: #06b6d4;
  --accent-glow: rgba(6, 182, 212, 0.4);
  
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(59, 130, 246, 0.5);
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  
  --shadow-neon: 0 0 20px rgba(59, 130, 246, 0.15);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

/* Reset & Global */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-base);
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.6;
}

/* Background elements */
.bg-glow-blobs {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -2;
  pointer-events: none;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
  animation: float-blob 20s infinite alternate ease-in-out;
}

.blob-1 {
  width: 500px;
  height: 500px;
  background: var(--primary);
  top: -100px;
  right: -50px;
}

.blob-2 {
  width: 600px;
  height: 600px;
  background: var(--secondary);
  bottom: 10%;
  left: -100px;
  animation-duration: 25s;
}

.blob-3 {
  width: 400px;
  height: 400px;
  background: var(--accent);
  top: 40%;
  right: 15%;
  animation-duration: 18s;
}

@keyframes float-blob {
  0% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(40px, -60px) scale(1.1);
  }
  100% {
    transform: translate(-20px, 30px) scale(0.95);
  }
}

/* Grid overlay background */
.bg-grid {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center top;
  z-index: -1;
  pointer-events: none;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-base);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* Typography Utilities */
h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
}

.font-en {
  font-family: var(--font-en);
}

.text-gradient-primary {
  background: linear-gradient(135deg, #60a5fa 0%, #a855f7 50%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-secondary {
  background: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.highlight {
  color: var(--accent);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-normal);
  text-decoration: none;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4), 0 0 15px rgba(168, 85, 247, 0.3);
}

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

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
}

/* Navigation bar */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition-normal);
}

header.scrolled {
  background: rgba(3, 7, 18, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 0;
}

header:not(.scrolled) {
  padding: 20px 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo span {
  font-family: var(--font-en);
}

.logo-icon {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
}

.nav-menu {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-menu a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-fast);
  font-size: 0.95rem;
  position: relative;
  padding: 4px 0;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: var(--transition-fast);
}

.nav-menu a:hover {
  color: var(--text-primary);
}

.nav-menu a:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Sections Global */
section {
  position: relative;
  padding: 100px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 9999px;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Scroll Animation Elements */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Hero Section */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 140px;
  padding-bottom: 60px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
  width: 100%;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.hero-tag .pulse {
  width: 8px;
  height: 8px;
  background-color: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent);
  animation: pulse-dot 1.5s infinite;
}

@keyframes pulse-dot {
  0% { transform: scale(0.95); opacity: 0.5; }
  50% { transform: scale(1.2); opacity: 1; box-shadow: 0 0 14px var(--accent); }
  100% { transform: scale(0.95); opacity: 0.5; }
}

.hero-title {
  font-size: 3.5rem;
  line-height: 1.2;
  margin-bottom: 24px;
  font-weight: 800;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
  width: 100%;
}

/* Terminal Mockup */
.terminal-mockup {
  width: 100%;
  max-width: 500px;
  background: rgba(10, 11, 20, 0.9);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(10px);
}

.terminal-header {
  background: rgba(255, 255, 255, 0.03);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.terminal-dot.red { background-color: #ef4444; }
.terminal-dot.yellow { background-color: #f59e0b; }
.terminal-dot.green { background-color: #10b981; }

.terminal-title {
  font-family: var(--font-en);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: 8px;
}

.terminal-body {
  padding: 16px;
  font-family: 'Consolas', 'Courier New', Courier, monospace;
  font-size: 0.85rem;
  color: #10b981;
}

.terminal-line {
  margin-bottom: 8px;
  display: flex;
  align-items: center;
}

.terminal-prompt {
  color: var(--secondary);
  margin-right: 8px;
  user-select: none;
}

.terminal-text {
  color: #e2e8f0;
}

.terminal-text.output {
  color: var(--accent);
}

.terminal-text.comment {
  color: var(--text-muted);
}

.typing-cursor {
  display: inline-block;
  width: 8px;
  height: 15px;
  background-color: var(--accent);
  margin-left: 4px;
  animation: cursor-blink 1s infinite;
}

@keyframes cursor-blink {
  0%, 100% { opacity: 0; }
  50% { opacity: 1; }
}

/* Hero Visual Section */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image-wrapper {
  position: relative;
  width: 100%;
  border-radius: var(--radius-lg);
  padding: 8px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.25) 0%, rgba(168, 85, 247, 0.25) 100%);
  box-shadow: var(--shadow-neon);
  overflow: hidden;
  animation: float-image 6s infinite ease-in-out;
}

@keyframes float-image {
  0% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
  100% { transform: translateY(0); }
}

.hero-image-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  left: -50%;
  width: 200%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transform: rotate(30deg);
  transition: var(--transition-slow);
}

.hero-image-wrapper:hover::before {
  left: 150%;
}

.hero-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: calc(var(--radius-lg) - 8px);
  object-fit: cover;
  transition: var(--transition-slow);
}

.hero-image-wrapper:hover .hero-img {
  transform: scale(1.02);
}

.floating-badge {
  position: absolute;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  padding: 16px 24px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  z-index: 10;
}

.floating-badge.badge-1 {
  bottom: 30px;
  left: -20px;
  animation: float-badge-1 5s infinite ease-in-out;
}

.floating-badge.badge-2 {
  top: 40px;
  right: -10px;
  animation: float-badge-2 7s infinite ease-in-out alternate;
}

@keyframes float-badge-1 {
  0% { transform: translateY(0) rotate(1deg); }
  50% { transform: translateY(-8px) rotate(-1deg); }
  100% { transform: translateY(0) rotate(1deg); }
}

@keyframes float-badge-2 {
  0% { transform: translateY(0) scale(1); }
  50% { transform: translateY(6px) scale(0.98); }
  100% { transform: translateY(0) scale(1); }
}

.badge-icon {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.badge-info h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.badge-info p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Stats Section */
.stats-section {
  padding-top: 40px;
  padding-bottom: 40px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 32px 24px;
  border-radius: var(--radius-md);
  text-align: center;
  backdrop-filter: blur(10px);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition-normal);
}

.stat-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.15);
  background: var(--bg-surface-hover);
}

.stat-card:hover::after {
  opacity: 1;
}

.stat-num {
  font-family: var(--font-en);
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--text-primary);
  display: flex;
  justify-content: center;
  align-items: baseline;
  background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-num span.plus {
  font-size: 2rem;
  color: var(--accent);
  margin-left: 2px;
  -webkit-text-fill-color: var(--accent);
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Philosophy Section (0 to 1) */
.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}

.philosophy-grid::before {
  content: '';
  position: absolute;
  top: 35%;
  left: 15%;
  right: 15%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
  opacity: 0.2;
  z-index: 0;
}

.phil-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  position: relative;
  z-index: 1;
  backdrop-filter: blur(10px);
  transition: var(--transition-normal);
}

.phil-card:hover {
  transform: translateY(-8px);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

.phil-num {
  font-family: var(--font-en);
  font-size: 3.5rem;
  font-weight: 900;
  margin-bottom: 24px;
  line-height: 1;
  opacity: 0.8;
}

.phil-card:nth-child(1) .phil-num {
  color: var(--primary);
}

.phil-card:nth-child(2) .phil-num {
  color: var(--secondary);
}

.phil-card:nth-child(3) .phil-num {
  color: var(--accent);
}

.phil-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.phil-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* Course Tab Section */
.tab-container {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.tab-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 9999px;
  cursor: pointer;
  transition: var(--transition-normal);
}

.tab-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.course-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.course-card:hover {
  transform: translateY(-8px);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

.course-header {
  padding: 32px 32px 16px;
}

.course-tag {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(6, 182, 212, 0.1);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.course-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.course-desc {
  font-size: 0.925rem;
  color: var(--text-secondary);
}

.course-body {
  padding: 0 32px 32px;
  flex-grow: 1;
}

.curriculum-list {
  list-style: none;
  margin-top: 20px;
}

.curriculum-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.curriculum-list li i {
  color: var(--primary);
  font-size: 0.9rem;
}

.course-footer {
  padding: 24px 32px;
  background: rgba(255, 255, 255, 0.01);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.course-info {
  display: flex;
  flex-direction: column;
}

.course-duration {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.course-type {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Portfolio Section */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.portfolio-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  transition: var(--transition-normal);
}

.portfolio-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.15);
}

.portfolio-visual {
  height: 240px;
  background-size: cover;
  background-position: center;
  position: relative;
}

.portfolio-visual-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, transparent 30%, rgba(3, 7, 18, 0.9) 100%);
}

.portfolio-tags {
  position: absolute;
  top: 20px;
  left: 20px;
  display: flex;
  gap: 8px;
}

.portfolio-tag {
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 9999px;
}

.portfolio-body {
  padding: 32px;
}

.portfolio-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.portfolio-author {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.portfolio-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.portfolio-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.portfolio-link:hover {
  color: var(--text-primary);
  gap: 10px;
}

/* Reviews / Testimonials Slider */
.slider-container {
  position: relative;
  overflow: hidden;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}

.slider-wrapper {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  width: 100%;
}

.slide {
  min-width: 100%;
  box-sizing: border-box;
  padding: 0 10px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 48px;
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  position: relative;
}

.review-card::before {
  content: '“';
  position: absolute;
  top: 15px;
  left: 40px;
  font-size: 8rem;
  font-family: var(--font-en);
  line-height: 1;
  color: var(--primary);
  opacity: 0.1;
}

.review-text {
  font-size: 1.2rem;
  line-height: 1.8;
  color: var(--text-primary);
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
  font-weight: 500;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 16px;
}

.author-img {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  object-fit: cover;
}

.author-info h4 {
  font-size: 1.05rem;
  font-weight: 700;
}

.author-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.slider-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 32px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-fast);
}

.dot.active {
  background: var(--primary);
  width: 24px;
  border-radius: 5px;
}

/* Call to Action Banner */
.cta-section {
  padding-bottom: 120px;
}

.cta-banner {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(168, 85, 247, 0.15) 100%);
  border: 1px solid var(--border-color);
  padding: 80px 40px;
  border-radius: var(--radius-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.1), transparent 50%);
  pointer-events: none;
}

.cta-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 24px;
}

.cta-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Modal styling */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: 20px;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background: var(--bg-modal);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 540px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  transform: translateY(20px);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}

.modal-overlay.open .modal-content {
  transform: translateY(0);
}

.modal-header {
  padding: 32px 32px 20px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid var(--border-color);
}

.modal-title h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.modal-title p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition-fast);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.modal-body {
  padding: 32px;
  overflow-y: auto;
  flex-grow: 1;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.form-input {
  width: 100%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  transition: var(--transition-normal);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.25);
  background: rgba(255, 255, 255, 0.05);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.checkbox-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 8px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  cursor: pointer;
  user-select: none;
}

.checkbox-label input {
  display: none;
}

.checkbox-custom {
  width: 18px;
  height: 18px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  background: rgba(255, 255, 255, 0.03);
  flex-shrink: 0;
}

.checkbox-label input:checked + .checkbox-custom {
  background-color: var(--primary);
  border-color: var(--primary);
}

.checkbox-label input:checked + .checkbox-custom::after {
  content: '✓';
  color: white;
  font-size: 0.75rem;
  font-weight: bold;
}

.form-textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  min-height: 100px;
  resize: vertical;
  transition: var(--transition-normal);
}

.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.25);
  background: rgba(255, 255, 255, 0.05);
}

.modal-footer {
  padding: 24px 32px 32px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* Form success message */
.form-success-wrapper {
  text-align: center;
  padding: 40px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.success-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 24px;
  animation: scale-up 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes scale-up {
  0% { transform: scale(0.5); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.success-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.success-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 320px;
  margin-bottom: 32px;
  line-height: 1.6;
}

/* Footer Section */
footer {
  border-top: 1px solid var(--border-color);
  background: #020617;
  padding: 80px 24px 40px;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.footer-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 280px;
}

.social-links {
  display: flex;
  gap: 12px;
}

.social-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: var(--transition-fast);
  font-size: 0.95rem;
}

.social-btn:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  transform: translateY(-2px);
}

.footer-column h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--text-primary);
  padding-left: 4px;
}

.footer-contact-info {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-contact-info li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.footer-contact-info i {
  color: var(--primary);
  margin-top: 3px;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.copyright {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-bottom-links a:hover {
  color: var(--text-primary);
}

/* Responsiveness */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }
  
  .hero-content {
    align-items: center;
  }
  
  .hero-desc {
    max-width: 100%;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .terminal-mockup {
    max-width: 100%;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .courses-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .portfolio-grid {
    grid-template-columns: 1fr;
  }
  
  .philosophy-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .philosophy-grid::before {
    display: none;
  }
}

@media (max-width: 768px) {
  section {
    padding: 60px 16px;
  }
  
  .hero-section {
    padding-top: 100px;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(3, 7, 18, 0.98);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .nav-actions .btn {
    display: none;
  }
  
  .courses-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-container {
    grid-template-columns: 1fr 1fr;
  }
  
  .review-card {
    padding: 32px 24px;
  }
  
  .cta-banner {
    padding: 48px 24px;
  }
  
  .cta-title {
    font-size: 2rem;
  }
  
  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.1rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-container {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .floating-badge {
    display: none;
  }
}