/* Dark Theme with 3D Style Effects */
/* Premium SaaS Design */

:root {
  /* Dark Theme Colors */
  --bg-primary: #0A0E27;
  --bg-secondary: #141B2D;
  --bg-tertiary: #1E293B;
  --bg-card: rgba(30, 41, 59, 0.6);
  --bg-card-hover: rgba(30, 41, 59, 0.9);
  
  /* Accent Colors */
  --primary: #6366F1;
  --primary-dark: #4F46E5;
  --primary-light: #818CF8;
  --secondary: #8B5CF6;
  --accent: #EC4899;
  --gradient-primary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 50%, #EC4899 100%);
  
  /* Text Colors */
  --text-primary: #FFFFFF;
  --text-secondary: rgba(255, 255, 255, 0.8);
  --text-tertiary: rgba(255, 255, 255, 0.6);
  --text-muted: rgba(255, 255, 255, 0.4);
  
  /* Borders & Shadows */
  --border-color: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(99, 102, 241, 0.5);
  --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(99, 102, 241, 0.2);
  --shadow-xl: 0 16px 48px rgba(99, 102, 241, 0.3);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.4);
  
  /* 3D Effects */
  --transform-3d: perspective(1000px) rotateX(0deg) rotateY(0deg);
  --transform-hover: perspective(1000px) rotateX(-5deg) rotateY(5deg) translateZ(20px);
}

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

body.dark-theme {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', 'Roboto', sans-serif;
  background: #0A0E27 !important;
  color: #FFFFFF !important;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Animated Background */
body.dark-theme::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 40% 20%, rgba(236, 72, 153, 0.1) 0%, transparent 50%);
  animation: gradientShift 20s ease infinite;
  z-index: -1;
  pointer-events: none;
}

@keyframes gradientShift {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(30px, 30px) rotate(120deg); }
  66% { transform: translate(-20px, 20px) rotate(240deg); }
}

/* 3D Card Effects */
.card-3d {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
  position: relative;
  overflow: hidden;
}

.card-3d::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: -1;
}

.card-3d:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.card-3d:hover::before {
  opacity: 0.1;
}

/* 3D Button Effects */
.btn-3d {
  background: var(--gradient-primary);
  color: white;
  padding: 1rem 2rem;
  border: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

.btn-3d::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-3d:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.6);
}

.btn-3d:hover::before {
  width: 300px;
  height: 300px;
}

.btn-3d:active {
  transform: translateY(0) scale(1);
}

/* Glass Morphism Effect */
.glass {
  background: rgba(30, 41, 59, 0.6);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
}

/* Floating Animation */
@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(5deg); }
}

.float-animation {
  animation: float 6s ease-in-out infinite;
}

/* Glow Effects */
.glow {
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.5);
  transition: box-shadow 0.3s ease;
}

.glow:hover {
  box-shadow: 0 0 40px rgba(99, 102, 241, 0.8);
}

/* Section Styles */
.section {
  padding: 5rem 0;
  position: relative;
}

.section-dark {
  background: var(--bg-secondary);
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header Dark Theme */
.header {
  background: rgba(10, 14, 39, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: all 0.3s ease;
}

.header.scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(10, 14, 39, 0.95);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: 3.5rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: 2.5rem;
  color: var(--text-primary);
}

h3 {
  font-size: 1.75rem;
  color: var(--text-secondary);
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: 2rem;
}

.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));
}

/* Responsive */
@media (max-width: 768px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  .container { padding: 0 1rem; }
  .section { padding: 3rem 0; }
}