/* Modern AI Theme CSS Variables and Base Styles */

:root {
  /* Primary Colors */
  --primary-blue: #2A3B8F;
  --primary-teal: #19E5D9;
  --primary-purple: #7B42F6;
  
  /* Secondary Colors */
  --dark-navy: #1A1A35;
  --bright-cyan: #00C2FF;
  --off-white: #F5F9FF;
  
  /* Gradient Combinations */
  --gradient-primary: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
  --gradient-secondary: linear-gradient(135deg, var(--primary-teal), var(--bright-cyan));
  
  /* Typography */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Roboto', sans-serif;
  --font-code: 'Space Mono', monospace;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
  
  /* Z-index layers */
  --z-nav: 1000;
  --z-modal: 2000;
  --z-tooltip: 3000;
}

/* Base Typography */
body {
  font-family: var(--font-body);
  color: var(--dark-navy);
  background-color: var(--off-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

h2 {
  font-size: 2.5rem;
}

h3 {
  font-size: 2rem;
}

h4 {
  font-size: 1.5rem;
}

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

code {
  font-family: var(--font-code);
  background-color: rgba(0, 0, 0, 0.05);
  padding: 0.2em 0.4em;
  border-radius: var(--radius-sm);
}

/* Modern Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all var(--transition-medium);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--off-white);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--gradient-secondary);
  color: var(--dark-navy);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Card Styles */
.card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-medium);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Modern Form Elements */
.input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  transition: border-color var(--transition-fast);
}

.input:focus {
  outline: none;
  border-color: var(--primary-teal);
}

/* Grid and Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

/* Animation Utility Classes */
.fade-in {
  opacity: 0;
  animation: fadeIn var(--transition-medium) forwards;
}

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

.slide-up {
  transform: translateY(20px);
  opacity: 0;
  animation: slideUp var(--transition-medium) forwards;
}

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

/* Responsive Breakpoints */
@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  h3 {
    font-size: 1.75rem;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
}