/* {{RIPER-5:
   Action: "Added"
   Task_ID: "#6"
   Authoring_Role: "LD"
   Principle_Applied: "Aether-Design-Liquid-Glass, Aether-Design-Universal-Softness, Aether-Engineering-KISS"
   Quality_Check: "CSS validated, follows black & white theme, implements glass morphism"
}} */

/* {{START_MODIFICATIONS}} */

/* ========================================
   AETHER DESIGN SYSTEM - BLACK & WHITE THEME
   ======================================== */

:root {
  /* Black & White Color Palette */
  --color-black: #000000;
  --color-white: #ffffff;
  --color-gray-900: #0a0a0a;
  --color-gray-800: #1a1a1a;
  --color-gray-700: #2a2a2a;
  --color-gray-600: #404040;
  --color-gray-500: #666666;
  --color-gray-400: #999999;
  --color-gray-300: #cccccc;
  --color-gray-200: #e5e5e5;
  --color-gray-100: #f5f5f5;

  /* Aether Glass Effects */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-hover: rgba(255, 255, 255, 0.1);
  --glass-active: rgba(255, 255, 255, 0.15);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(255, 255, 255, 0.2);

  /* Border Radius - Aether Universal Softness */
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
}

/* ========================================
   RESET & BASE STYLES
   ======================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-black) 100%);
  color: var(--color-white);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Animated Background Pattern */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-gray-300);
}

a {
  color: var(--color-white);
  text-decoration: none;
  transition: all 0.3s var(--transition-smooth);
}

/* ========================================
   GLASS COMPONENTS
   ======================================== */

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all 0.4s var(--transition-smooth);
}

.glass-card:hover {
  background: var(--glass-hover);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.2);
}

/* ========================================
   BUTTONS - Aether Style
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 1rem 2rem;
  border-radius: var(--radius-2xl);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: all 0.3s var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--color-white);
  color: var(--color-black);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--color-gray-100);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: translateY(-2px) scale(1.02);
}

.btn-secondary {
  background: var(--glass-bg);
  color: var(--color-white);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.btn-secondary:hover {
  background: var(--glass-hover);
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: var(--shadow-glow);
}

/* ========================================
   NAVIGATION
   ======================================== */

.navbar {
  position: fixed;
  top: var(--spacing-md);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  width: calc(100% - 4rem);
  max-width: 1200px;
}

.nav-container {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-sm) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-md);
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-menu {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
}

.nav-link {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-2xl);
  transition: all 0.3s var(--transition-smooth);
  color: var(--color-gray-300);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-white);
  background: var(--glass-hover);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
  position: relative;
}

.hero-content {
  max-width: 900px;
  position: relative;
  z-index: 1;
}

.hero-title {
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-white) 0%, var(--color-gray-400) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  color: var(--color-gray-300);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ========================================
   SECTIONS
   ======================================== */

.section {
  padding: var(--spacing-3xl) var(--spacing-lg);
  position: relative;
  z-index: 1;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-subtitle {
  text-align: center;
  font-size: 1.2rem;
  color: var(--color-gray-400);
  max-width: 700px;
  margin: 0 auto var(--spacing-xl);
}

/* ========================================
   GRID LAYOUTS
   ======================================== */

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

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* ========================================
   FEATURE CARDS
   ======================================== */

.feature-card {
  text-align: center;
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  transition: all 0.4s var(--transition-bounce);
}

.feature-card:hover .feature-icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow: var(--shadow-glow);
}

.feature-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.feature-description {
  color: var(--color-gray-400);
}

/* ========================================
   CODE BLOCK
   ======================================== */

.code-block {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-lg);
  overflow-x: auto;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  box-shadow: var(--shadow-md);
}

.code-block code {
  color: var(--color-gray-200);
}

/* ========================================
   BADGE
   ======================================== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
  padding: var(--spacing-xl) var(--spacing-lg);
  text-align: center;
  border-top: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.footer-link {
  color: var(--color-gray-400);
  transition: color 0.3s var(--transition-smooth);
}

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

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 768px) {
  .navbar {
    width: calc(100% - 2rem);
    top: var(--spacing-sm);
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: var(--spacing-sm);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    flex-direction: column;
    padding: var(--spacing-sm);
    display: none;
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   ANIMATIONS
   ======================================== */

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

.fade-in-up {
  animation: fadeInUp 0.6s var(--transition-smooth) forwards;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.float {
  animation: float 3s ease-in-out infinite;
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

.text-center {
  text-align: center;
}

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

/* {{END_MODIFICATIONS}} */