/* 
  AI Resume Builder - Premium Design System
  Focus: Modern SaaS, High-Contrast, Professional, and Trustworthy
*/

:root {
  /* Color Palette - Deep Navy & Vibrant Blue */
  --primary-hsl: 221, 83%, 53%;
  --primary: hsl(var(--primary-hsl));
  --primary-dark: hsl(221, 83%, 43%);
  --primary-light: hsl(221, 83%, 95%);
  
  --secondary-hsl: 199, 89%, 48%;
  --secondary: hsl(var(--secondary-hsl));
  
  --accent-hsl: 262, 83%, 58%;
  --accent: hsl(var(--accent-hsl));
  
  /* Neutral Grays */
  --bg-white: #ffffff;
  --bg-soft: #f8fafc;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  
  /* Status Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  
  /* Typography */
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Outfit', var(--font-main);
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Shadows & Effects */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-premium: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Overrides */
[data-theme="dark"] {
  --bg-white: #0f172a;
  --bg-soft: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  --border: #334155;
  --primary-light: rgba(59, 130, 246, 0.1);
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-soft);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, .display-font {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
}

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

button {
  cursor: pointer;
  border: none;
  outline: none;
  font-family: inherit;
  transition: var(--transition-fast);
}

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Typography Utilities */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-muted { color: var(--text-muted); }
.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Button Variants */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  gap: 0.5rem;
}

.btn-primary {
  background-color: var(--primary);
  color: white;
  box-shadow: 0 4px 14px 0 rgba(var(--primary-hsl), 0.39);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(var(--primary-hsl), 0.45);
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--border);
  color: var(--text-main);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background-color: var(--primary-light);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

/* Section Spacing */
section {
  padding: var(--space-3xl) 0;
}

/* Animation Classes */
.fade-in {
  animation: fadeIn 0.6s ease-out forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}