/* ============================================
   DESIGN SYSTEM - Mineral Earth Theme
   IT Services Company Website
   ============================================ */

/* ----------------------------------------
   CSS CUSTOM PROPERTIES (Design Tokens)
   ---------------------------------------- */
:root {
  /* Primary Colors - Terracotta Family */
  --color-primary: #C4654A;
  --color-primary-light: #E8A090;
  --color-primary-dark: #8B4332;
  --color-primary-hover: #D4755A;
  
  /* Secondary Colors - Sage Family */
  --color-secondary: #7A8B6E;
  --color-secondary-light: #A4B396;
  --color-secondary-dark: #5A6B4E;
  
  /* Accent Colors - Deep Teal */
  --color-accent: #3D6B6B;
  --color-accent-light: #5A8A8A;
  --color-accent-dark: #2D5555;
  
  /* Neutral Colors - Warm Stone */
  --color-neutral-900: #2D2D2D;
  --color-neutral-800: #3D3D3D;
  --color-neutral-700: #5A5A5A;
  --color-neutral-600: #6A6A6A;
  --color-neutral-500: #7A7A7A;
  --color-neutral-400: #9A9A9A;
  --color-neutral-300: #BABABA;
  --color-neutral-200: #DADAD8;
  --color-neutral-100: #F7F5F2;
  --color-neutral-50: #FFFDF9;
  
  /* Semantic Colors */
  --color-success: #5A8B6E;
  --color-warning: #C4954A;
  --color-error: #C45A5A;
  --color-info: #5A7A8B;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
  --gradient-hero: linear-gradient(160deg, var(--color-neutral-50) 0%, var(--color-neutral-100) 50%, var(--color-secondary-light) 100%);
  --gradient-card: linear-gradient(180deg, var(--color-neutral-50) 0%, var(--color-neutral-100) 100%);
  --gradient-overlay: linear-gradient(180deg, rgba(45, 45, 45, 0) 0%, rgba(45, 45, 45, 0.9) 100%);
  
  /* Typography */
  --font-heading: 'Outfit', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  
  /* Font Sizes - Fluid Typography */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 3.5rem);
  --text-5xl: clamp(3rem, 2rem + 5vw, 5rem);
  
  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Line Heights */
  --leading-tight: 1.2;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(45, 45, 45, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(45, 45, 45, 0.08), 0 2px 4px -1px rgba(45, 45, 45, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(45, 45, 45, 0.1), 0 4px 6px -2px rgba(45, 45, 45, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(45, 45, 45, 0.1), 0 10px 10px -5px rgba(45, 45, 45, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(45, 45, 45, 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgba(45, 45, 45, 0.06);
  --shadow-primary: 0 4px 14px rgba(196, 101, 74, 0.3);
  --shadow-card: 0 4px 20px rgba(45, 45, 45, 0.08);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  --transition-slower: 500ms ease;
  
  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  
  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1440px;
}

/* ----------------------------------------
   CSS RESET & BASE STYLES
   ---------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--color-neutral-700);
  background-color: var(--color-neutral-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ----------------------------------------
   TYPOGRAPHY
   ---------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--color-neutral-900);
  margin-bottom: var(--space-4);
}

h1 {
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--text-4xl);
  letter-spacing: -0.01em;
}

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

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

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

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

p {
  margin-bottom: var(--space-4);
  color: var(--color-neutral-600);
}

.lead {
  font-size: var(--text-xl);
  line-height: var(--leading-relaxed);
  color: var(--color-neutral-600);
}

.text-small {
  font-size: var(--text-sm);
}

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

.text-muted {
  color: var(--color-neutral-400);
}

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

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

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

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

a:hover {
  color: var(--color-accent-light);
}

strong {
  font-weight: var(--font-semibold);
  color: var(--color-neutral-900);
}

/* ----------------------------------------
   LAYOUT UTILITIES
   ---------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.container-narrow {
  max-width: var(--container-lg);
}

.container-wide {
  max-width: var(--container-2xl);
}

.section {
  padding-top: var(--space-20);
  padding-bottom: var(--space-20);
}

.section-sm {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

.section-lg {
  padding-top: var(--space-32);
  padding-bottom: var(--space-32);
}

/* 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-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.gap-10 { gap: var(--space-10); }
.gap-12 { gap: var(--space-12); }

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

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

@media (min-width: 640px) {
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
  .lg\:grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
  .lg\:grid-cols-6 { grid-template-columns: repeat(6, 1fr); }
}

/* Spacing Utilities */
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mt-16 { margin-top: var(--space-16); }

.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }

.mx-auto { margin-left: auto; margin-right: auto; }

.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

/* Background Utilities */
.bg-white { background-color: var(--color-neutral-50); }
.bg-cream { background-color: var(--color-neutral-100); }
.bg-primary { background-color: var(--color-primary); }
.bg-secondary { background-color: var(--color-secondary); }
.bg-accent { background-color: var(--color-accent); }
.bg-gradient-hero { background: var(--gradient-hero); }

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

/* ----------------------------------------
   RESPONSIVE BREAKPOINTS
   ---------------------------------------- */
@media (max-width: 639px) {
  .container {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
  
  .section {
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
  }
  
  .section-lg {
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
  }
}

/* ----------------------------------------
   FOCUS STATES (Accessibility)
   ---------------------------------------- */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ----------------------------------------
   SELECTION
   ---------------------------------------- */
::selection {
  background-color: var(--color-primary-light);
  color: var(--color-neutral-900);
}

/* ----------------------------------------
   SCROLLBAR (Webkit)
   ---------------------------------------- */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-neutral-100);
}

::-webkit-scrollbar-thumb {
  background: var(--color-neutral-300);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-neutral-400);
}