:root {
  --bg: #030712;
  --fg: #f9fafb;
  --muted: #9ca3af;
  --accent: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.15);
  --card-bg: rgba(17, 24, 39, 0.7);
  --card-border: rgba(255, 255, 255, 0.1);
  --glass: rgba(255, 255, 255, 0.03);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg);
  background-image: 
    radial-gradient(circle at 50% -20%, #1e293b 0%, transparent 50%),
    radial-gradient(circle at 0% 100%, #0f172a 0%, transparent 40%);
  color: var(--fg);
  min-height: 100vh;
  line-height: 1.5;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

/* Hero Section */
.hero {
  text-align: center;
  margin-bottom: 5rem;
  animation: fadeInDown 0.8s ease-out;
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(to bottom, #fff 30%, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
}

.hero .subtitle {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto;
}

/* Grid Layout */
.section-group {
  margin-bottom: 4rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--accent-glow), transparent);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  perspective: 1000px;
}

/* App Card Styling */
.card {
  position: relative;
  text-decoration: none;
  color: inherit;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: var(--accent);
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5), 0 0 20px var(--accent-glow);
}

.card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    600px circle at var(--mouse-x) var(--mouse-y),
    rgba(255, 255, 255, 0.06),
    transparent 40%
  );
  border-radius: 24px;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
  z-index: 3;
}

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

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 24px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent, rgba(255,255,255,0.05));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.icon {
  width: 80px;
  height: 80px;
  background: var(--glass);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  transition: transform 0.3s ease;
  box-shadow: inset 0 0 10px rgba(255,255,255,0.05);
}

.card:hover .icon {
  transform: rotate(-5deg) scale(1.1);
  background: var(--accent-glow);
}

.icon img {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.meta .title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: #fff;
}

.meta .desc {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.6;
}

/* Animations */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Background Decoration */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 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='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.02;
  pointer-events: none;
  z-index: 10;
}

/* Responsive Tweaks */
@media (max-width: 640px) {
  .container {
    padding: 2rem 1rem;
  }
  .grid {
    grid-template-columns: 1fr;
  }
  .card {
    padding: 1.5rem;
  }
}