/* 
 * UI Theme: Dark High-Tech Brutalist
 * Emphasis: Typography, Contrast, Precision
 * Colors: Deep Obsidian, Cyber Emerald (#00FFA3), Ash Gray
 */

:root {
  /* Colors */
  --bg-base: #030303;
  --bg-surface: rgba(18, 18, 18, 0.6);
  --bg-surface-hover: rgba(28, 28, 28, 0.8);
  --text-primary: #f0f0f0;
  --text-secondary: #94a3b8;
  --accent-emerald: #00FFA3;
  --accent-emerald-dim: rgba(0, 255, 163, 0.15);

  /* Typography */
  --font-sans: 'Manrope', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Metrics */
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 32px;

  /* Motion */
  --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  background-color: transparent;
}

/* WebGL Background */
#webgl-canvas-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  pointer-events: none;
  background-color: var(--bg-base);
}

/* Visual Layers: Noise & Grid */
.noise {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

.grid-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: -1;
  background-size: 40px 40px;
  background-image: radial-gradient(circle at 1px 1px, rgba(255, 255, 255, 0.05) 1px, transparent 0);
  mask-image: radial-gradient(ellipse at top, black 40%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at top, black 40%, transparent 80%);
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  transition: background-color var(--transition-fast), backdrop-filter var(--transition-fast);
}

.navbar.scrolled {
  background-color: rgba(3, 3, 3, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.logo-img {
  filter: drop-shadow(0 0 10px rgba(0, 255, 163, 0.4));
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

.logo:hover .logo-img {
  transform: rotate(-10deg) scale(1.1);
  filter: drop-shadow(0 0 20px rgba(0, 255, 163, 0.8));
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

.lang-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.lang-btn:hover {
  border-color: var(--accent-emerald);
  color: var(--accent-emerald);
  background: var(--accent-emerald-dim);
}

/* Hero Section */
.hero {
  padding-top: 180px;
  padding-bottom: 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-xl);
  background: var(--bg-surface);
  border: 1px solid rgba(0, 255, 163, 0.3);
  color: var(--accent-emerald);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  margin-bottom: 2rem;
  text-transform: uppercase;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(3.5rem, 8vw, 6.5rem);
  line-height: 1;
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
}

.accent-text {
  background: linear-gradient(90deg, #FFFFFF 0%, var(--accent-emerald) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: var(--text-secondary);
  max-width: 650px;
  margin-bottom: 3rem;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 6rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--text-primary);
  color: var(--bg-base);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: var(--accent-emerald);
  box-shadow: 0 10px 40px -10px var(--accent-emerald);
}

.btn-secondary {
  background: var(--bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

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

/* App Showcase */
.app-showcase {
  position: relative;
  width: 100%;
  max-width: 1000px;
  border-radius: var(--radius-lg);
  /* Soft border mimicking a window frame */
  border: 1px solid rgba(255, 255, 255, 0.05);
  background: #090909;
  padding: 0.5rem;
  box-shadow: 0 30px 100px -20px rgba(0, 0, 0, 0.8);
}

.app-mockup {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  display: block;
  position: relative;
  z-index: 2;
}

.app-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 80%;
  height: 60%;
  transform: translate(-50%, -50%);
  background: var(--accent-emerald);
  filter: blur(150px);
  opacity: 0.15;
  z-index: 1;
  pointer-events: none;
}

/* Features Section */
.features {
  padding: 120px 2rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  margin-bottom: 4rem;
  letter-spacing: -0.03em;
}

.features-grid {
  display: flex;
  flex-wrap: nowrap;
  gap: 1.5rem;
  overflow-x: auto;
  padding-bottom: 2rem;
  /* Hide scrollbar for clean look */
  -ms-overflow-style: none;
  /* IE and Edge */
  scrollbar-width: none;
  /* Firefox */
}

.features-grid::-webkit-scrollbar {
  display: none;
}

.feature-card {
  flex: 1 1 0;
  min-width: 250px;
  background: var(--bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  padding: 2.5rem;
  transition: all var(--transition-fast);
}

.feature-card:hover {
  background: var(--bg-surface-hover);
  border-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-5px);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  font-family: var(--font-heading);
  color: var(--accent-emerald);
}

.feature-content h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.feature-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Downloads Section */
.downloads-section {
  padding: 60px 2rem 120px;
}

.downloads-box {
  background: linear-gradient(145deg, rgba(18, 18, 18, 0.8), rgba(9, 9, 9, 0.9));
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  padding: 5rem 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.downloads-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-emerald), transparent);
  opacity: 0.3;
}

.downloads-box h2 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.downloads-box p {
  color: var(--text-secondary);
  margin-bottom: 4rem;
  font-size: 1.1rem;
}

.dl-platforms {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.dl-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 3rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  min-width: 220px;
}

.dl-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(0, 255, 163, 0.4);
  box-shadow: 0 10px 30px rgba(0, 255, 163, 0.1);
}

.dl-icon {
  margin-bottom: 1rem;
  color: var(--text-primary);
  transition: color 0.2s;
}

.dl-card:hover .dl-icon {
  color: var(--accent-emerald);
}

.dl-card h3 {
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.dl-format {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Footer */
.footer {
  padding: 3rem 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

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

/* Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

.delay-1 {
  transition-delay: 0.1s;
}

.delay-2 {
  transition-delay: 0.2s;
}

.delay-3 {
  transition-delay: 0.3s;
}

.delay-4 {
  transition-delay: 0.4s;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .nav-content {
    height: 70px;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
    max-width: 300px;
    gap: 1rem;
  }

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

  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}