/* 
 * DATACENTER WEBSITE TEMPLATE
 * Modern Enterprise Cloud Infrastructure Design System
 * Colors: Deep Navy, Electric Blue, Cyan, Neon Teal/Purple
 */

/* ==========================================
   CSS VARIABLES & DESIGN TOKENS
   ========================================== */

:root {
  /* Primary Colors - Datacenter Theme */
  --navy-deep: #0a1128;
  --navy-mid: #1a1f3a;
  --navy-light: #2a3555;
  
  /* Electric & Neon Accents */
  --electric-blue: #0066ff;
  --cyan-bright: #00d4ff;
  --neon-teal: #00ffcc;
  --purple-glow: #8b5cf6;
  --purple-light: #a78bfa;
  
  /* Neutrals */
  --white: #ffffff;
  --off-white: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--navy-deep) 0%, var(--electric-blue) 100%);
  --gradient-accent: linear-gradient(135deg, var(--cyan-bright) 0%, var(--purple-glow) 100%);
  --gradient-glow: radial-gradient(circle at 50% 50%, rgba(0, 212, 255, 0.15) 0%, transparent 70%);
  --gradient-mesh: radial-gradient(at 40% 20%, rgba(0, 102, 255, 0.2) 0px, transparent 50%),
                    radial-gradient(at 80% 0%, rgba(139, 92, 246, 0.2) 0px, transparent 50%),
                    radial-gradient(at 0% 50%, rgba(0, 255, 204, 0.15) 0px, transparent 50%);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Space Grotesk', 'Inter', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* 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);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-glow-blue: 0 0 30px rgba(0, 102, 255, 0.3);
  --shadow-glow-cyan: 0 0 30px rgba(0, 212, 255, 0.3);
  --shadow-glow-purple: 0 0 30px rgba(139, 92, 246, 0.3);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

body {
  font-family: var(--font-primary);
  background-color: var(--navy-deep);
  color: var(--off-white);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--white);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin-bottom: var(--spacing-sm);
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  margin-bottom: var(--spacing-sm);
}

h5 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

h6 {
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--cyan-bright);
  font-weight: 600;
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--gray-300);
  font-size: 1rem;
  line-height: 1.7;
}

.text-large {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  line-height: 1.8;
}

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

.label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 600;
  color: var(--cyan-bright);
  display: inline-block;
  margin-bottom: var(--spacing-xs);
}

/* ==========================================
   LAYOUT & GRID
   ========================================== */

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-wide {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-narrow {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-3xl) 0;
  position: relative;
}

.section-sm {
  padding: var(--spacing-2xl) 0;
}

.section-lg {
  padding: clamp(5rem, 12vw, 8rem) 0;
}

.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));
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

/* ==========================================
   BUTTONS
   ========================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
  font-family: var(--font-primary);
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(0, 102, 255, 0.3);
}

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

.btn-accent {
  background: var(--gradient-accent);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(0, 212, 255, 0.3);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 212, 255, 0.4);
}

.btn-outline {
  background: transparent;
  border-color: var(--electric-blue);
  color: var(--electric-blue);
}

.btn-outline:hover {
  background: var(--electric-blue);
  color: var(--white);
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  color: var(--white);
  backdrop-filter: blur(10px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

/* ==========================================
   CARDS & GLASSMORPHISM
   ========================================== */

.card {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.card-glow {
  box-shadow: var(--shadow-glow-blue);
}

.card-glow:hover {
  box-shadow: var(--shadow-glow-cyan);
}

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

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 17, 40, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background: rgba(10, 17, 40, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
  font-family: var(--font-heading);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  color: var(--gray-300);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  transition: color var(--transition-base);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: width var(--transition-base);
}

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

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

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 0.375rem;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-toggle span {
  width: 25px;
  height: 2px;
  background: var(--white);
  transition: all var(--transition-base);
}

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

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: var(--navy-deep);
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-mesh);
  opacity: 0.6;
  z-index: 0;
}

.hero-grid {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(rgba(0, 212, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.05) 1px, transparent 1px);
  background-size: 50px 50px;
  opacity: 0.3;
  z-index: 0;
}

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

.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  color: var(--gray-300);
  margin-bottom: var(--spacing-xl);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

/* ==========================================
   STATS SECTION
   ========================================== */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-2xl) 0;
}

.stat-card {
  text-align: center;
  padding: var(--spacing-lg);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.stat-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateY(-5px);
}

.stat-number {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: 0.95rem;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
}

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

.feature-card {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateY(-8px);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-accent);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  font-size: 1.75rem;
}

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

.feature-description {
  color: var(--gray-400);
  line-height: 1.7;
}

/* ==========================================
   PRICING CARDS
   ========================================== */

.pricing-card {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
}

.pricing-card.featured {
  background: rgba(0, 102, 255, 0.1);
  border-color: var(--electric-blue);
  transform: scale(1.05);
}

.pricing-card.featured::before {
  content: 'POPULAR';
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: var(--gradient-accent);
  color: var(--white);
  padding: 0.375rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.pricing-card:hover {
  transform: translateY(-10px) scale(1.02);
  border-color: var(--cyan-bright);
}

.pricing-name {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--cyan-bright);
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: var(--spacing-xs);
}

.pricing-price span {
  font-size: 1.25rem;
  color: var(--gray-400);
  font-weight: 400;
}

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

.pricing-features li {
  padding: 0.75rem 0;
  color: var(--gray-300);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

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

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

.footer {
  background: var(--navy-mid);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-col h4 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
  color: var(--white);
}

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

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--gray-400);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

.footer-bottom {
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: var(--gray-500);
  font-size: 0.9rem;
}

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

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes glow {
  0%, 100% {
    opacity: 0.5;
  }
  50% {
    opacity: 1;
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================
   UTILITIES
   ========================================== */

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

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

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

.mt-0 { margin-top: 0; }
.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-0 { margin-bottom: 0; }
.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); }

.bg-dark {
  background: var(--navy-deep);
}

.bg-light {
  background: var(--navy-mid);
}

.bg-gradient {
  background: var(--gradient-primary);
}

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

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 17, 40, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .mobile-toggle {
    display: flex;
  }
  
  .mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .mobile-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .section {
    padding: var(--spacing-2xl) 0;
  }
}

@media (max-width: 480px) {
  :root {
    font-size: 14px;
  }
  
  .container,
  .container-wide,
  .container-narrow {
    padding: 0 var(--spacing-sm);
  }
}

/* ==========================================
   BACKGROUND EFFECTS
   ========================================== */

.particles-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
}

.circuit-lines {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(90deg, transparent 49%, rgba(0, 212, 255, 0.1) 50%, transparent 51%),
    linear-gradient(transparent 49%, rgba(0, 212, 255, 0.1) 50%, transparent 51%);
  background-size: 100px 100px;
  opacity: 0.1;
}

.glow-orb {
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  pointer-events: none;
}

.glow-orb-1 {
  background: var(--electric-blue);
  top: 20%;
  left: 10%;
  animation: float 8s ease-in-out infinite;
}

.glow-orb-2 {
  background: var(--purple-glow);
  top: 60%;
  right: 10%;
  animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-30px);
  }
}