/* {{RIPER-5:
   Action: "Modified"
   Task_ID: "#1"
   Timestamp: "2026-01-14"
   Authoring_Role: "LD"
   Principle_Applied: "Aether-Design-Liquid-Glass, Aether-Design-Universal-Softness"
   Quality_Check: "Design system implemented with rounded-2xl and backdrop-filter"
}} */

/* ==================== CSS RESET & BASE ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Liquid Glass Colors */
  --glass-white: rgba(255, 255, 255, 0.1);
  --glass-white-strong: rgba(255, 255, 255, 0.15);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: rgba(0, 0, 0, 0.3);
  
  /* Brand Colors */
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  
  /* Background Gradients */
  --bg-dark: #0a0a0f;
  --bg-gradient: linear-gradient(135deg, #0a0a0f 0%, #1a1a2e 50%, #16213e 100%);
  
  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.5);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius - Universal Softness */
  --radius-soft: 1rem; /* rounded-2xl equivalent */
  --radius-full: 9999px; /* rounded-full */
  
  /* Transitions */
  --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-duration: 300ms;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ==================== LIQUID GLASS UTILITIES ==================== */
.glass {
  background: var(--glass-white);
  backdrop-filter: blur(20px) saturate(180%) brightness(1.1);
  -webkit-backdrop-filter: blur(20px) saturate(180%) brightness(1.1);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-soft);
  box-shadow: 0 8px 32px var(--glass-shadow);
}

.glass-strong {
  background: var(--glass-white-strong);
  backdrop-filter: blur(30px) saturate(200%) brightness(1.15);
  -webkit-backdrop-filter: blur(30px) saturate(200%) brightness(1.15);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-soft);
  box-shadow: 0 12px 48px var(--glass-shadow);
}

.glass-hover {
  transition: all var(--transition-duration) var(--transition-smooth);
}

.glass-hover:hover {
  background: var(--glass-white-strong);
  transform: translateY(-2px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4),
              inset 0 1px 2px rgba(255, 255, 255, 0.1);
}

/* ==================== NAVIGATION ==================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-md) 0;
  transition: all var(--transition-duration) var(--transition-smooth);
}

.navbar.scrolled {
  background: var(--glass-white);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 4px 24px var(--glass-shadow);
}

.navbar .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-duration) var(--transition-smooth);
  position: relative;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: var(--radius-full);
}

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

/* ==================== BUTTONS ==================== */
.btn {
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-soft);
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  cursor: pointer;
  border: none;
  transition: all var(--transition-duration) var(--transition-smooth);
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--text-primary);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4),
              inset 0 1px 2px rgba(255, 255, 255, 0.2);
}

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

.btn-secondary:hover {
  background: var(--glass-white-strong);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

/* ==================== HERO SECTION ==================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--spacing-2xl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 50%, rgba(99, 102, 241, 0.15), transparent 50%),
              radial-gradient(circle at 70% 50%, rgba(139, 92, 246, 0.15), transparent 50%);
  pointer-events: none;
}

.hero .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  position: relative;
  z-index: 1;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--text-primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.5;
}

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

/* ==================== SECTIONS ==================== */
.section {
  padding: var(--spacing-2xl) 0;
  position: relative;
}

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

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-xl);
}

/* ==================== CARDS ==================== */
.card {
  background: var(--glass-white);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-soft);
  padding: var(--spacing-lg);
  transition: all var(--transition-duration) var(--transition-smooth);
}

.card:hover {
  background: var(--glass-white-strong);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px var(--glass-shadow),
              inset 0 1px 2px rgba(255, 255, 255, 0.1);
}

.card-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-soft);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
}

.card-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.card-text {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==================== 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));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ==================== PRICING CARDS ==================== */
.pricing-card {
  background: var(--glass-white);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-soft);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-duration) var(--transition-smooth);
  position: relative;
}

.pricing-card.featured {
  border: 2px solid var(--primary);
  background: var(--glass-white-strong);
}

.pricing-card.featured::before {
  content: 'POPULAR';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  padding: 0.25rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 60px var(--glass-shadow);
}

.pricing-plan {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: var(--spacing-xs);
}

.pricing-price span {
  font-size: 1.25rem;
  color: var(--text-secondary);
}

.pricing-features {
  list-style: none;
  margin: var(--spacing-lg) 0;
  text-align: left;
}

.pricing-features li {
  padding: var(--spacing-sm) 0;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.pricing-features li::before {
  content: '✓';
  color: var(--primary);
  font-weight: 700;
  font-size: 1.25rem;
}

/* ==================== FOOTER ==================== */
.footer {
  background: var(--glass-white);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--spacing-xl) 0 var(--spacing-lg);
  margin-top: var(--spacing-2xl);
  border-top: 1px solid var(--glass-border);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
  margin-bottom: var(--spacing-md);
  font-size: 1.25rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

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

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--glass-border);
  color: var(--text-muted);
}

/* ==================== FORMS ==================== */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--glass-white);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-soft);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-duration) var(--transition-smooth);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1),
              inset 0 1px 2px rgba(255, 255, 255, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--glass-strong);
    backdrop-filter: blur(30px) saturate(200%);
    -webkit-backdrop-filter: blur(30px) saturate(200%);
    padding: var(--spacing-lg);
    border-radius: 0 0 var(--radius-soft) var(--radius-soft);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-duration) var(--transition-smooth);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
    text-align: center;
  }
}

/* ==================== 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 {
  animation: float 3s ease-in-out infinite;
}

/* ==================== UTILITIES ==================== */
.text-center {
  text-align: center;
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }