/* ==========================================================================
   RIFID SOFTWARE LLC - BASE CSS
   Shared foundation for all sites
   ========================================================================== */

/* ==========================================================================
   CSS RESET (Modern Minimal)
   ========================================================================== */

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

* {
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  line-height: 1.5;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

/* ==========================================================================
   CSS VARIABLES (Root)
   ========================================================================== */

:root {
  /* Corporate Neutral Palette */
  --warm-white: #fdfcfb;
  --warm-white-200: #f7f6f4;
  --warm-white-300: #f0efec;
  --text-primary: #2b2b2b;
  --text-secondary: #5a5a5a;
  --text-tertiary: #7a7a7a;
  --border-light: #e8e7e5;
  --border-medium: #d0cfc9;
  --border-dark: #b0afa9;
  --accent-corporate: #7a8069;
  
  /* Spacing Scale */
  --space-xs: 0.5rem;     /* 8px */
  --space-sm: 1rem;       /* 16px */
  --space-md: 1.5rem;     /* 24px */
  --space-lg: 2rem;       /* 32px */
  --space-xl: 3rem;       /* 48px */
  --space-2xl: 4rem;      /* 64px */
  --space-3xl: 6rem;      /* 96px */
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* Typography Scale */
  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-lg: 1.125rem;    /* 18px */
  --text-xl: 1.25rem;     /* 20px */
  --text-2xl: 1.5rem;     /* 24px */
  --text-3xl: 1.875rem;   /* 30px */
  --text-4xl: 2.25rem;    /* 36px */
  --text-5xl: 3rem;       /* 48px */
  --text-6xl: 3.75rem;    /* 60px */
  
  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --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);
  
  /* Z-index Scale */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal: 400;
  --z-tooltip: 500;
}

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--warm-white);
}

/* Headings - All Title Case per spec */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--text-primary);
}

h1 {
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
}

h2 {
  font-size: var(--text-4xl);
  font-weight: var(--font-semibold);
}

h3 {
  font-size: var(--text-3xl);
}

h4 {
  font-size: var(--text-2xl);
}

h5 {
  font-size: var(--text-xl);
}

h6 {
  font-size: var(--text-lg);
}

/* Paragraph */
p {
  margin-bottom: var(--space-md);
  line-height: var(--leading-relaxed);
}

p:last-child {
  margin-bottom: 0;
}

/* Links */
a {
  color: var(--accent-corporate);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

a:focus-visible {
  outline: 2px solid var(--accent-corporate);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Lists */
ul, ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
}

li {
  margin-bottom: var(--space-xs);
  line-height: var(--leading-relaxed);
}

/* Strong/Bold */
strong, b {
  font-weight: var(--font-semibold);
}

/* Small text */
small {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* Code */
code {
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 0.9em;
  padding: 0.125rem 0.25rem;
  background-color: var(--warm-white-200);
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   LAYOUT UTILITIES
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  max-width: 800px;
}

.container-wide {
  max-width: 1400px;
}

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

.section-sm {
  padding: var(--space-2xl) 0;
}

.section-lg {
  padding: 4rem 0;
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-end {
  justify-content: flex-end;
}

.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* Grid Utilities */
.grid {
  display: grid;
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Text Utilities */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.text-secondary {
  color: var(--text-secondary);
}

.text-tertiary {
  color: var(--text-tertiary);
}

/* Display Utilities */
.hidden {
  display: none;
}

.block {
  display: block;
}

.inline-block {
  display: inline-block;
}

/* Spacing Utilities */
.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */

/* Mobile First Approach */

/* Tablet (768px and up) */
@media (max-width: 768px) {
  :root {
    --text-5xl: 2.25rem;  /* 36px on mobile */
    --text-4xl: 1.875rem; /* 30px on mobile */
    --text-3xl: 1.5rem;   /* 24px on mobile */
  }
  
  .container {
    padding: 0 var(--space-md);
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
  
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
}

/* Desktop (1024px and up) */
@media (min-width: 1024px) {
  .section {
    padding: 5rem 0;
  }
}

/* ==========================================================================
   ACCESSIBILITY
   ========================================================================== */

/* Skip to main content link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent-corporate);
  color: white;
  padding: 8px;
  text-decoration: none;
  z-index: var(--z-modal);
}

.skip-link:focus {
  top: 0;
}

/* Focus visible styles for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--accent-corporate);
  outline-offset: 2px;
}

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

/* Screen reader only utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}