/* ==========================================================================
   Aetheria Labs - Global Design System & Stylesheet
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800;900&display=swap');

:root {
  /* Color Palette - Deep Cyberpunk & Glassmorphic Dark Mode */
  --bg-primary: #05070e;
  --bg-secondary: #0a0e1a;
  --bg-surface: #101628;
  --bg-surface-hover: #161f38;
  
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-cyan: #00f2fe;
  --accent-blue: #4facfe;
  --accent-violet: #8a2be2;
  --accent-pink: #ff0844;
  --accent-emerald: #10b981;
  
  --gradient-main: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 50%, var(--accent-violet) 100%);
  --gradient-glow: linear-gradient(135deg, rgba(0, 242, 254, 0.4) 0%, rgba(138, 43, 226, 0.4) 100%);
  --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  
  /* Glassmorphism Tokens */
  --glass-bg: rgba(16, 22, 40, 0.65);
  --glass-bg-heavy: rgba(10, 14, 26, 0.85);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(0, 242, 254, 0.35);
  --glass-blur: blur(16px);
  
  /* Shadows & Glows */
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.7);
  --glow-cyan: 0 0 25px rgba(0, 242, 254, 0.3);
  --glow-violet: 0 0 25px rgba(138, 43, 226, 0.3);
  
  /* Typography & Layout */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --container-width: 1280px;
  --header-height: 80px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-surface-hover);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-blue);
}

/* Selection */
::selection {
  background: var(--accent-violet);
  color: #ffffff;
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-primary);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul {
  list-style: none;
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Gradient & Highlight Texts */
.text-gradient {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.text-gradient-cyan {
  background: linear-gradient(90deg, #fff 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Glowing Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.825rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.25);
  color: var(--accent-cyan);
  box-shadow: var(--glow-cyan);
  margin-bottom: 20px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  outline: none;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn-primary {
  background: var(--gradient-main);
  color: #ffffff;
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.3);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, var(--accent-violet) 0%, var(--accent-cyan) 100%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: -1;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 242, 254, 0.6), 0 0 15px rgba(138, 43, 226, 0.4);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-glass {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
  box-shadow: var(--glow-cyan);
}

/* Header & Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: var(--glass-bg-heavy);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 900;
  font-size: 1.25rem;
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.5);
  position: relative;
}

.logo-icon::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 12px;
  background: var(--gradient-main);
  z-index: -1;
  opacity: 0.4;
  filter: blur(6px);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--gradient-main);
  transition: width var(--transition-normal);
  border-radius: var(--radius-full);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 1001;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero-bg-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.15) 0%, rgba(138, 43, 226, 0.05) 50%, transparent 70%);
  filter: blur(80px);
  z-index: 0;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 60px 0;
}

.hero-title {
  font-size: clamp(2.75rem, 6vw, 4.75rem);
  font-weight: 900;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 40px;
  font-weight: 400;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

/* Glass Cards & 3D Tilt */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.glass-card:hover {
  border-color: var(--glass-border-hover);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), 0 0 25px rgba(0, 242, 254, 0.15);
  transform: translateY(-6px);
}

.tilt-card {
  transform-style: preserve-3d;
  will-change: transform;
}

/* Section Common Styles */
.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 64px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.25rem);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
}

/* Grid Layouts */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 30px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(480px, 1fr));
  gap: 40px;
}

/* Feature Icons */
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--accent-cyan);
  margin-bottom: 24px;
  box-shadow: inset 0 0 15px rgba(0, 242, 254, 0.15);
}

/* Interactive Sandbox / Live Preview Widget */
.sandbox-widget {
  background: var(--glass-bg-heavy);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(0, 242, 254, 0.1);
  overflow: hidden;
  margin-top: 60px;
}

.sandbox-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--glass-border);
}

.sandbox-dots {
  display: flex;
  gap: 8px;
}

.sandbox-dot {
  width: 12px; height: 12px; border-radius: 50%;
}

.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.sandbox-tabs {
  display: flex;
  gap: 12px;
}

.sandbox-tab {
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sandbox-tab.active, .sandbox-tab:hover {
  background: rgba(0, 242, 254, 0.1);
  border-color: rgba(0, 242, 254, 0.3);
  color: var(--accent-cyan);
}

.sandbox-body {
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

/* Stats / ROI Counter Section */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-card {
  padding: 32px 20px;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 8px;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
}

/* Interactive Compute Calculator (Pricing Page) */
.calculator-box {
  max-width: 850px;
  margin: 0 auto 60px;
  padding: 48px;
  background: var(--glass-bg-heavy);
  border: 1px solid rgba(0, 242, 254, 0.3);
  border-radius: var(--radius-lg);
  box-shadow: 0 0 50px rgba(0, 242, 254, 0.15);
}

.slider-container {
  margin: 36px 0;
}

.range-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 10px;
  border-radius: 5px;
  background: var(--bg-surface);
  outline: none;
  border: 1px solid var(--glass-border);
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-cyan);
  cursor: pointer;
  box-shadow: 0 0 15px var(--accent-cyan);
  border: 3px solid #ffffff;
  transition: transform var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* FAQ Accordion */
.accordion {
  max-width: 800px;
  margin: 0 auto;
}

.accordion-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.accordion-item:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.accordion-header {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
}

.accordion-icon {
  transition: transform var(--transition-normal);
  color: var(--accent-cyan);
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 0 24px;
  color: var(--text-secondary);
}

.accordion-item.active .accordion-body {
  padding-bottom: 24px;
}

/* Architecture Stack Tabs */
.arch-tabs {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.arch-tab-btn {
  padding: 12px 28px;
  border-radius: var(--radius-full);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.arch-tab-btn.active, .arch-tab-btn:hover {
  background: rgba(0, 242, 254, 0.15);
  border-color: var(--accent-cyan);
  color: #ffffff;
  box-shadow: var(--glow-cyan);
}

/* Forms & Inputs */
.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-primary);
}

.form-input, .form-textarea {
  width: 100%;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: rgba(16, 22, 40, 0.8);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  outline: none;
  transition: all var(--transition-fast);
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.2);
}

/* Toast Alert */
.toast-container {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 9999;
}

.toast {
  background: var(--glass-bg-heavy);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--accent-cyan);
  padding: 16px 24px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg), var(--glow-cyan);
  display: flex;
  align-items: center;
  gap: 12px;
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-normal);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--glass-border);
  padding: 80px 0 32px;
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 64px;
}

.footer-logo-text {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-top: 16px;
  max-width: 320px;
}

.footer-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--glass-border);
  padding-top: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Responsive Rules */
@media (max-width: 1024px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .sandbox-body {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-actions {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .navbar.mobile-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: var(--glass-bg-heavy);
    backdrop-filter: var(--glass-blur);
    padding: 32px 24px;
    border-bottom: 1px solid var(--glass-border);
    gap: 24px;
  }
  .navbar.mobile-open .nav-actions {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: calc(var(--header-height) + 260px);
    left: 0;
    width: 100%;
    background: var(--glass-bg-heavy);
    padding: 0 24px 32px;
    border-bottom: 1px solid var(--glass-border);
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}