/* ==========================================================================
   VERTEX SOLUTIONS - INDUSTRIAL CORPORATE DESIGN SYSTEM
   Tagline: BUILDING A MORE RESILIENT TOMORROW
   ========================================================================== */

/* Modern Premium Typography: Outfit (Headings) + Plus Jakarta Sans (Body) + JetBrains Mono (Technical/Specs) */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&family=Outfit:wght@400;500;600;700;800;900&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  /* Brand Palette derived from Vertex logo */
  --color-navy: #0B192C;
  --color-navy-dark: #06101E;
  --color-navy-light: #162B48;
  --color-corporate-blue: #0F4C81;
  --color-corporate-blue-light: #1E6091;
  --color-cyan: #0284C7;
  --color-cyan-bright: #00C2FF;
  --color-lime: #10B981;
  --color-lime-bright: #84CC16;

  /* Neutral Spectrum */
  --color-white: #FFFFFF;
  --color-offwhite: #F8FAFC;
  --color-gray-50: #F1F5F9;
  --color-gray-100: #E2E8F0;
  --color-gray-200: #CBD5E1;
  --color-gray-300: #94A3B8;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1E293B;
  --color-gray-900: #0F172A;

  /* Premium Industrial Typography System */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', "SF Mono", "Roboto Mono", monospace;

  /* Spacing System */
  --space-xs: 0.5rem;   /* 8px */
  --space-sm: 1rem;     /* 16px */
  --space-md: 1.5rem;   /* 24px */
  --space-lg: 2.5rem;   /* 40px */
  --space-xl: 4rem;     /* 64px */
  --space-2xl: 6rem;    /* 96px */

  /* Layout Boundaries */
  --container-max-width: 1280px;
  --header-height: 84px;
  --header-height-sticky: 70px;

  /* Engineering Visual Elements */
  --border-subtle: 1px solid var(--color-gray-100);
  --border-technical: 1px solid rgba(15, 76, 129, 0.15);
  --border-dark-subtle: 1px solid rgba(255, 255, 255, 0.1);
  --shadow-subtle: 0 4px 20px -2px rgba(11, 25, 44, 0.05);
  --shadow-card: 0 10px 30px -5px rgba(11, 25, 44, 0.08);
  --shadow-sticky: 0 4px 25px rgba(11, 25, 44, 0.12);
  --transition-standard: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: var(--color-white);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-navy);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.4rem, 4vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.75rem);
  font-weight: 700;
}

h3 {
  font-size: clamp(1.3rem, 2vw, 1.75rem);
  font-weight: 700;
}

h4 {
  font-size: 1.25rem;
  font-weight: 600;
}

p {
  margin-bottom: 1rem;
  color: var(--color-gray-600);
  font-size: 1rem;
  line-height: 1.7;
}

p.lead {
  font-size: 1.18rem;
  font-weight: 400;
  color: var(--color-gray-700);
  line-height: 1.75;
}

a {
  color: var(--color-corporate-blue);
  text-decoration: none;
  transition: var(--transition-standard);
}

a:hover {
  color: var(--color-cyan);
}

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

/* Technical & Grid Layout Helpers */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.grid {
  display: grid;
  gap: 2rem;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-12 { grid-template-columns: repeat(12, 1fr); }

@media (max-width: 992px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Technical Label / Eyebrow Badge */
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-corporate-blue);
  margin-bottom: 1rem;
}

.section-eyebrow::before {
  content: "";
  display: inline-block;
  width: 12px;
  height: 2px;
  background-color: var(--color-lime);
}

.section-title {
  margin-bottom: 1.25rem;
  text-transform: uppercase;
}

.section-subtitle {
  max-width: 720px;
  font-size: 1.125rem;
  color: var(--color-gray-600);
  margin-bottom: 2.5rem;
}

/* Subtle Technical Grid Overlay Background */
.bg-technical-grid {
  background-image: 
    linear-gradient(to right, rgba(15, 76, 129, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(15, 76, 129, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}

.bg-navy {
  background-color: var(--color-navy);
  color: var(--color-white);
}

.bg-navy h1, .bg-navy h2, .bg-navy h3, .bg-navy h4 {
  color: var(--color-white);
}

.bg-navy p {
  color: var(--color-gray-300);
}

.bg-offwhite {
  background-color: var(--color-offwhite);
}

.bg-slate {
  background-color: var(--color-gray-50);
}

/* Accessibility focus styles */
:focus-visible {
  outline: 3px solid var(--color-cyan);
  outline-offset: 3px;
}

/* Motion preference fallback */
@media (prefers-reduced-motion: reduce) {
  *, ::before, ::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}