:root {
  /* Color Variables */
  --color-primary: #3B82F6; /* Blue */
  --color-secondary: #8B5CF6; /* Purple */
  --color-accent: #F59E0B; /* Orange */
  
  --color-dark: #111827; /* Dark background */
  --color-dark-lighter: #1F2937; /* Lighter dark for cards, etc. */
  --color-gray: #4B5563; /* Medium gray for secondary text */
  --color-light-gray: #9CA3AF; /* Light gray for borders, etc. */
  --color-light: #F3F4F6; /* Light background */
  --color-white: #FFFFFF; /* White */
  
  --color-success: #10B981; /* Green for success messages */
  --color-error: #EF4444; /* Red for error messages */
  --color-warning: #F59E0B; /* Orange for warnings */
  --color-info: #3B82F6; /* Blue for info messages */
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  
  /* Font Sizes */
  --font-size-xs: 0.75rem; /* 12px */
  --font-size-sm: 0.875rem; /* 14px */
  --font-size-base: 1rem; /* 16px */
  --font-size-lg: 1.125rem; /* 18px */
  --font-size-xl: 1.25rem; /* 20px */
  --font-size-2xl: 1.5rem; /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem; /* 36px */
  --font-size-5xl: 3rem; /* 48px */
  
  /* Spacing */
  --spacing-xs: 0.25rem; /* 4px */
  --spacing-sm: 0.5rem; /* 8px */
  --spacing-md: 1rem; /* 16px */
  --spacing-lg: 1.5rem; /* 24px */
  --spacing-xl: 2rem; /* 32px */
  --spacing-2xl: 3rem; /* 48px */
  --spacing-3xl: 4rem; /* 64px */
  --spacing-4xl: 6rem; /* 96px */
  
  /* Border Radius */
  --radius-sm: 0.25rem; /* 4px */
  --radius-md: 0.5rem; /* 8px */
  --radius-lg: 1rem; /* 16px */
  --radius-full: 9999px;
  
  /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* Z-index */
  --z-negative: -1;
  --z-elevate: 1;
  --z-dropdown: 10;
  --z-sticky: 100;
  --z-fixed: 1000;
  --z-modal: 2000;
  --z-popover: 5000;
  --z-tooltip: 9000;
}

/* Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-light);
  background-color: var(--color-dark);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  color: var(--color-white);
}

p {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
}

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

a:hover {
  color: var(--color-secondary);
}

img, svg {
  max-width: 100%;
  height: auto;
}

/* Placeholder Styles */
.placeholder {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  overflow: hidden;
}

.particles-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: var(--z-negative);
}

.placeholder__content {
  max-width: 800px;
  width: 100%;
  text-align: center;
  position: relative;
  z-index: var(--z-elevate);
}

/* Logo Styles */

.logo-icon {
  transform-origin: center;
}

.flow-line {
  stroke-dasharray: 100;
  stroke-dashoffset: 100;
  animation-fill-mode: forwards;
}

.flow-line--blue {
  animation: flowLineAnimation 2s ease forwards;
}

.flow-line--purple {
  animation: flowLineAnimation 2s ease forwards 0.3s;
}

.flow-line--orange {
  animation: flowLineAnimation 2s ease forwards 0.6s;
}

@keyframes flowLineAnimation {
  to {
    stroke-dashoffset: 0;
  }
}

/* Title Styles */
.placeholder__title {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--spacing-lg);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 1s ease forwards 1s;
}

.gradient-text {
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-fill-color: transparent;
}

.placeholder__subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-light-gray);
  margin-bottom: var(--spacing-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 1s ease forwards 1.3s;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--font-size-base);
  line-height: 1.5;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  outline: none;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.btn--primary::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 5px;
  background: rgba(255, 255, 255, 0.5);
  opacity: 0;
  border-radius: 100%;
  transform: scale(1, 1) translate(-50%);
  transform-origin: 50% 50%;
}

.btn--primary:hover {
  background-color: var(--color-primary);
  filter: brightness(1.1);
}

.btn--primary:hover::after {
  animation: ripple 1s ease-out;
}

@keyframes ripple {
  0% {
    transform: scale(0, 0);
    opacity: 0.5;
  }
  100% {
    transform: scale(100, 100);
    opacity: 0;
  }
}

.btn--full {
  width: 100%;
}

/* Particle Animation */
.particle {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  will-change: transform, opacity;
}

/* Prefers Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}