/* ===========================
   CSS Reset & Base Styles
   =========================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Color Palette - Bright Theme */
  --primary-color: #667eea;
  --primary-light: #a5b4fc;
  --primary-dark: #4c51bf;
  --secondary-color: #f093fb;
  --secondary-light: #fce7f3;
  --accent-color: #4fd1c5;
  --accent-light: #b2f5ea;
  
  /* Neutral Colors */
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-900: #111827;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

body {
  font-family: var(--font-sans);
  color: var(--gray-900);
  background: linear-gradient(135deg, #fdfcfb 0%, #e2d1c3 100%);
  background-attachment: fixed;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ===========================
   Header
   =========================== */
.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: var(--spacing-md) 0;
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  gap: var(--spacing-lg);
}

.nav a {
  color: var(--gray-700);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width var(--transition-base);
}

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

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

/* ===========================
   Hero Section
   =========================== */
.hero {
  padding: var(--spacing-2xl) 0;
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.hero-text {
  animation: fadeInUp 0.8s ease-out;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--gray-600);
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
}

.hero-image {
  animation: fadeInRight 0.8s ease-out;
}

.hero-illustration {
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  filter: drop-shadow(0 20px 40px rgba(102, 126, 234, 0.2));
  animation: float 3s ease-in-out infinite;
}

/* ===========================
   CTA Button
   =========================== */
.cta-button {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--white);
  text-decoration: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1.125rem;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.cta-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left var(--transition-slow);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.cta-button:hover::before {
  left: 100%;
}

.cta-button.large {
  padding: var(--spacing-md) var(--spacing-2xl);
  font-size: 1.25rem;
}

/* ===========================
   Apps Section
   =========================== */
.apps-section {
  padding: var(--spacing-2xl) 0;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-sm);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--gray-600);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xl);
}

.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.app-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  cursor: pointer;
  animation: fadeInUp 0.6s ease-out backwards;
}

.app-card:nth-child(1) { animation-delay: 0.1s; }
.app-card:nth-child(2) { animation-delay: 0.2s; }
.app-card:nth-child(3) { animation-delay: 0.3s; }
.app-card:nth-child(4) { animation-delay: 0.4s; }

.app-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.app-card-placeholder {
  border: 2px dashed var(--gray-300);
  background: var(--gray-50);
  opacity: 0.7;
}

.app-icon {
  width: 100px;
  height: 100px;
  margin: 0 auto var(--spacing-md);
  transition: transform var(--transition-base);
}

.app-card:hover .app-icon {
  transform: scale(1.1) rotate(5deg);
}

.app-icon svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.app-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--gray-900);
  text-align: center;
}

.app-description {
  color: var(--gray-600);
  text-align: center;
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.app-platforms {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
}

.platform-badge {
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--white);
}

.platform-badge.ios {
  background: linear-gradient(135deg, #667eea, #764ba2);
}

.platform-badge.android {
  background: linear-gradient(135deg, #4fd1c5, #38b2ac);
}

/* ===========================
   Contact Section
   =========================== */
.contact-section {
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

/* ===========================
   Footer
   =========================== */
.footer {
  background: var(--gray-900);
  color: var(--white);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-2xl);
}

.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-links a {
  color: var(--gray-300);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ===========================
   Animations
   =========================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-description {
    font-size: 1.125rem;
  }
  
  .nav {
    gap: var(--spacing-md);
  }
  
  .nav a {
    font-size: 0.875rem;
  }
  
  .apps-grid {
    grid-template-columns: 1fr;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .footer .container {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .logo {
    font-size: 1.25rem;
  }
  
  .nav {
    gap: var(--spacing-sm);
  }
  
  .cta-button {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1rem;
  }
  
  .cta-button.large {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.125rem;
  }
}