/* Base Styles */
:root {
  /* Color system */
  --primary-50: #e6f0f9;
  --primary-100: #cce1f3;
  --primary-200: #99c3e7;
  --primary-300: #66a4db;
  --primary-400: #3386cf;
  --primary-500: #0068c3;
  --primary-600: #0056a4;
  --primary-700: #004585;
  --primary-800: #003366;
  --primary-900: #002247;
  
  --secondary-50: #fef9e6;
  --secondary-100: #fdf3cc;
  --secondary-200: #fbe899;
  --secondary-300: #f9dc66;
  --secondary-400: #f8d033;
  --secondary-500: #f7c400;
  --secondary-600: #f7c948;
  --secondary-700: #daa800;
  --secondary-800: #b28900;
  --secondary-900: #8a6a00;
  
  --accent-50: #f9e6e9;
  --accent-100: #f3ccd3;
  --accent-200: #e799a7;
  --accent-300: #db667b;
  --accent-400: #cf334f;
  --accent-500: #c30023;
  --accent-600: #c8102e;
  --accent-700: #a4001e;
  --accent-800: #850018;
  --accent-900: #660012;
  
  --success-500: #10b981;
  --warning-500: #f59e0b;
  --error-500: #ef4444;
  
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  /* Font system */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  
  /* Spacing system (8px grid) */
  --space-1: 0.25rem; /* 4px */
  --space-2: 0.5rem;  /* 8px */
  --space-3: 0.75rem; /* 12px */
  --space-4: 1rem;    /* 16px */
  --space-5: 1.25rem; /* 20px */
  --space-6: 1.5rem;  /* 24px */
  --space-8: 2rem;    /* 32px */
  --space-10: 2.5rem; /* 40px */
  --space-12: 3rem;   /* 48px */
  --space-16: 4rem;   /* 64px */
  --space-20: 5rem;   /* 80px */
  --space-24: 6rem;   /* 96px */
  
  /* Border radius */
  --radius-sm: 0.25rem; /* 4px */
  --radius-md: 0.375rem; /* 6px */
  --radius-lg: 0.5rem;  /* 8px */
  --radius-xl: 0.75rem; /* 12px */
  --radius-2xl: 1rem;   /* 16px */
  
  /* Shadow */
  --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: 250ms ease;
  --transition-slow: 350ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--gray-800);
  background-color: var(--gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--primary-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-700);
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-4) 0;
  font-weight: 700;
  line-height: 1.2;
  color: var(--gray-900);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin: 0 0 var(--space-4) 0;
}

ul, ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: 100%;
  line-height: 1.15;
  margin: 0;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

/* Utility Classes */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header h2 {
  font-size: 2.25rem;
  margin-bottom: var(--space-3);
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background-color: var(--primary-600);
  border-radius: 2px;
}

.section-header p {
  font-size: 1.125rem;
  color: var(--gray-600);
  max-width: 600px;
  margin: var(--space-4) auto 0;
}

.section-header.left-aligned {
  text-align: left;
}

.section-header.left-aligned h2::after {
  left: 0;
  transform: none;
}

/* Button Styles */
.primary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  background-color: var(--primary-600);
  color: white;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.primary-btn:hover {
  background-color: var(--primary-700);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.primary-btn svg {
  margin-left: var(--space-2);
  transition: transform var(--transition-normal);
}

.primary-btn:hover svg {
  transform: translateX(4px);
}

.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  background-color: transparent;
  color: var(--primary-600);
  font-weight: 600;
  border: 2px solid var(--primary-600);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.secondary-btn:hover {
  background-color: var(--primary-50);
  color: var(--primary-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.text-link {
  color: var(--primary-600);
  font-weight: 500;
  position: relative;
  display: inline-block;
}

.text-link::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 2px;
  bottom: -2px;
  left: 0;
  background-color: var(--primary-600);
  transform: scaleX(0);
  transform-origin: bottom right;
  transition: transform var(--transition-normal);
}

.text-link:hover::after {
  transform: scaleX(1);
  transform-origin: bottom left;
}

/* Sections */
section {
  padding: var(--space-16) 0;
}

@media screen and (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  h3 {
    font-size: 1.25rem;
  }
  
  section {
    padding: var(--space-12) 0;
  }
  
  .section-header {
    margin-bottom: var(--space-8);
  }
}