/* 
  Infinite World - Ethereal Canvas Design System
  Aesthetic: Premium Light Mode, Alive, Minimalist Masterpiece
*/

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

:root {
  /* Colors */
  --bg-color: #ffffff;
  --surface-color: #fdfdff;
  --surface-border: rgba(0, 0, 0, 0.04);
  --text-primary: #0a0b10;
  --text-secondary: #6b7280;
  --accent-primary: #4f46e5; /* Indigo */
  --accent-secondary: #06b6d4; /* Cyan */
  --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
  --glow-color: rgba(79, 70, 229, 0.05);
  
  /* Shadows */
  --shadow-soft: 0 10px 40px rgba(0, 0, 0, 0.03);
  --shadow-luminous: 0 20px 60px rgba(79, 70, 229, 0.08);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 10rem;
  
  /* Animations */
  --transition-smooth: 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Ambient Glow Background */
.ambient-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: 
    radial-gradient(circle at 80% 20%, rgba(79, 70, 229, 0.03) 0%, transparent 40%),
    radial-gradient(circle at 20% 80%, rgba(6, 182, 212, 0.03) 0%, transparent 40%);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Typography Masterpiece */
h1, h2, h3 {
  letter-spacing: -0.04em;
  font-weight: 800;
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Navbar Ethereal */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  height: 80px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--surface-border);
  z-index: 1000;
  display: flex;
  align-items: center;
}

nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  margin-left: 30px;
  text-decoration: none;
  transition: 0.2s;
}

.nav-links a:hover {
  color: var(--accent-primary);
}

/* Hero Section */
.hero {
  padding-top: 180px;
  padding-bottom: 120px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(3.5rem, 10vw, 6.5rem);
  line-height: 0.95;
  margin-bottom: var(--spacing-md);
}

.hero p {
  color: var(--text-secondary);
  font-size: 1.3rem;
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
  font-weight: 500;
}

/* Feature Stack (New Layout) */
.feature-stack {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.feature-card {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
  background: var(--surface-color);
  padding: 60px;
  border-radius: 48px;
  border: 1px solid var(--surface-border);
  box-shadow: var(--shadow-soft);
  text-decoration: none;
  color: inherit;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow: var(--shadow-luminous);
  background: #fff;
}

.feature-card.reverse {
  direction: rtl;
}

.feature-card.reverse .card-content {
  direction: ltr;
}

@media (max-width: 992px) {
  .feature-card {
    grid-template-columns: 1fr;
    padding: 40px;
    gap: 40px;
    text-align: center;
  }
}

/* Card Elements */
.app-visual {
  width: 100%;
  aspect-ratio: 16/10;
  background: #f8faff;
  border-radius: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.app-icon-large {
  width: 120px;
  height: 120px;
  border-radius: 28px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.06);
}

.card-content h3 {
  font-size: 2.2rem;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.card-content p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 30px;
}

.feature-badge {
  display: inline-block;
  padding: 8px 16px;
  background: rgba(79, 70, 229, 0.05);
  color: var(--accent-primary);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

/* Mouse Glow Effect */
.mouse-glow {
  position: absolute;
  top: var(--y, -100%);
  left: var(--x, -100%);
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--glow-color) 0%, transparent 70%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: 1;
}

/* Buttons */
.btn {
  padding: 16px 32px;
  border-radius: 18px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  transition: var(--transition-smooth);
  cursor: pointer;
}

.btn-primary {
  background: var(--text-primary);
  color: #fff;
  border: none;
}

.btn-primary:hover {
  background: var(--accent-primary);
  transform: scale(1.05);
}

/* Footer */
footer {
  padding: var(--spacing-xl) 0 var(--spacing-md);
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}