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

:root {
  --navy-deepest: #020810;
  --navy-deep:    #050d1a;
  --navy-base:    #0a1628;
  --navy-mid:     #0d1f3c;
  --navy-light:   #132848;

  --glass-bg:     rgba(13, 31, 60, 0.55);
  --glass-border: rgba(79, 195, 247, 0.12);
  --glass-hover:  rgba(13, 31, 60, 0.75);

  --blue-primary: #1e90ff;
  --blue-bright:  #00b4ff;
  --blue-glow:    #0066cc;
  --blue-accent:  #4fc3f7;
  --cyan:         #00d4ff;

  --text-primary:   #e0e8ff;
  --text-secondary: #8aa4c8;
  --text-muted:     #4a6080;

  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  28px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--navy-deepest);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

/* ============================================================
   BACKGROUND ORBS
   ============================================================ */
.bg-orb {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
}

.orb-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(30, 144, 255, 0.18) 0%, transparent 70%);
  top: -200px;
  right: -200px;
}

.orb-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 180, 255, 0.12) 0%, transparent 70%);
  bottom: 10%;
  left: -150px;
}

.orb-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(79, 195, 247, 0.10) 0%, transparent 70%);
  top: 40%;
  left: 40%;
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 24px;
  background: rgba(2, 8, 16, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.logo-bracket {
  color: var(--blue-accent);
}

.logo-text {
  color: var(--text-primary);
  margin: 0 2px;
}

.nav-links {
  display: flex;
  gap: 8px;
}

.nav-link {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color 0.2s, background 0.2s;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--glass-bg);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 24px 80px;
}

.hero-inner {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue-accent);
  background: rgba(79, 195, 247, 0.1);
  border: 1px solid rgba(79, 195, 247, 0.25);
  border-radius: 100px;
  padding: 6px 18px;
  margin-bottom: 28px;
  animation: fadeSlideDown 0.7s ease both;
}

.hero-title {
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 20px;
  animation: fadeSlideDown 0.7s 0.1s ease both;
}

.hero-title-accent {
  background: linear-gradient(135deg, var(--blue-primary) 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto 40px;
  line-height: 1.7;
  animation: fadeSlideDown 0.7s 0.2s ease both;
}

.hero-cta-group {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
  animation: fadeSlideDown 0.7s 0.3s ease both;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--blue-primary), var(--blue-bright));
  box-shadow: 0 0 30px rgba(30, 144, 255, 0.35), 0 4px 16px rgba(0, 0, 0, 0.3);
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 45px rgba(30, 144, 255, 0.5), 0 8px 24px rgba(0, 0, 0, 0.4);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}

.btn-ghost:hover {
  background: var(--glass-hover);
  border-color: rgba(79, 195, 247, 0.25);
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  animation: fadeSlideDown 0.7s 0.4s ease both;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--blue-accent), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--glass-border);
}

/* ============================================================
   SECTIONS SHARED
   ============================================================ */
.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue-accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
}

/* ============================================================
   MODULES SECTION
   ============================================================ */
.modules {
  position: relative;
  z-index: 1;
  padding: 100px 0;
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 56px;
}

/* Module Cards */
.module-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 32px;
  border-radius: var(--radius-xl);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  opacity: 0;
  transform: translateY(24px);
}

.module-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.module-card:hover {
  border-color: rgba(79, 195, 247, 0.3);
  box-shadow: 0 0 60px rgba(30, 144, 255, 0.12), 0 20px 40px rgba(0, 0, 0, 0.3);
  transform: translateY(-4px);
}

.module-glow {
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(30, 144, 255, 0.15) 0%, transparent 70%);
  pointer-events: none;
  transition: opacity 0.3s;
}

.module-card:hover .module-glow {
  opacity: 1.5;
}

.module-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px;
}

.module-number {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--blue-accent);
  background: rgba(79, 195, 247, 0.1);
  border: 1px solid rgba(79, 195, 247, 0.2);
  border-radius: 6px;
  padding: 4px 10px;
}

.module-icon {
  width: 44px;
  height: 44px;
  color: var(--blue-accent);
  opacity: 0.7;
  transition: opacity 0.2s;
}

.module-card:hover .module-icon {
  opacity: 1;
}

.module-icon svg {
  width: 100%;
  height: 100%;
}

.module-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.3;
}

.module-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 24px;
}

.module-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--blue-accent);
  background: rgba(79, 195, 247, 0.08);
  border: 1px solid rgba(79, 195, 247, 0.15);
  border-radius: 4px;
  padding: 3px 9px;
}

.module-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  border-top: 1px solid var(--glass-border);
}

.module-cta {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--blue-bright);
}

.arrow-icon {
  width: 20px;
  height: 20px;
  color: var(--blue-bright);
  transition: transform 0.2s;
}

.module-card:hover .arrow-icon {
  transform: translateX(4px);
}

/* ============================================================
   FEATURES SECTION
   ============================================================ */
.features {
  position: relative;
  z-index: 1;
  padding: 80px 0 120px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 56px;
}

.feature-card {
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.feature-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.feature-icon {
  width: 44px;
  height: 44px;
  margin-bottom: 20px;
  color: var(--blue-accent);
}

.feature-icon svg {
  width: 100%;
  height: 100%;
}

.feature-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--glass-border);
  padding: 40px 24px;
  background: rgba(2, 8, 16, 0.6);
  backdrop-filter: blur(12px);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--text-muted);
}

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

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeSlideDown {
  from {
    opacity: 0;
    transform: translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .modules-grid {
    grid-template-columns: 1fr;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none;
  }

  .hero-stats {
    gap: 20px;
  }
}

@media (max-width: 600px) {
  .hero {
    padding: 100px 16px 60px;
  }

  .section-inner {
    padding: 0 16px;
  }

  .modules {
    padding: 60px 0;
  }

  .features {
    padding: 60px 0 80px;
  }

  .module-card {
    padding: 24px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-cta-group {
    flex-direction: column;
    align-items: center;
  }

  .btn-primary, .btn-ghost {
    width: 100%;
    justify-content: center;
    max-width: 280px;
  }
}