/* ============================================
   CGI GROUP — DESIGN SYSTEM (v2: Black + Helvetica)
   Client Growth Intelligence Group
   ============================================ */

:root {
  /* Core Palette — pure neutrals + logo-matched blue */
  --ink: #000000;
  --slate: #0A0A0A;
  --steel: #1A1A1A;
  --silver: #8A8A8A;
  --mist: #FFFFFF;
  --paper: #FAFAFA;
  --line: #E5E5E5;
  --line-dark: #1F1F1F;
  --signal: #0A1F8F;
  --signal-bright: #1A2F9F;
  --signal-glow: rgba(10, 31, 143, 0.18);

  /* Type — Helvetica everywhere, system mono for labels */
  --sans: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;

  /* Spacing */
  --container: 1280px;
  --gutter: clamp(1.5rem, 4vw, 3rem);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--sans);
  font-weight: 400;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.5;
  font-size: 15px;
  letter-spacing: -0.005em;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ============================================
   TYPOGRAPHY — Helvetica, tight, austere
   ============================================ */

h1, h2, h3, h4 {
  font-family: var(--sans);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.05;
  color: var(--ink);
}

h1 { font-size: clamp(2.5rem, 6vw, 5rem); font-weight: 500; letter-spacing: -0.035em; }
h2 { font-size: clamp(1.85rem, 3.8vw, 3rem); letter-spacing: -0.03em; font-weight: 500; }
h3 { font-size: clamp(1.25rem, 1.9vw, 1.6rem); letter-spacing: -0.02em; font-weight: 500; }
h4 { font-size: 1rem; font-weight: 600; letter-spacing: -0.01em; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2.25rem;
}

.eyebrow::before {
  content: '';
  display: inline-block;
  width: 14px;
  height: 1px;
  background: var(--signal);
  flex-shrink: 0;
}

.on-dark .eyebrow {
  color: var(--silver);
  border-bottom-color: rgba(255, 255, 255, 0.12);
}

/* Legacy compatibility */
.classify {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

p {
  color: var(--steel);
  max-width: 65ch;
  font-size: 0.95rem;
}

p.lead {
  font-size: 1.15rem;
  color: var(--slate);
  line-height: 1.45;
  max-width: 58ch;
  letter-spacing: -0.01em;
}

.on-dark p { color: #B5B5B5; }
.on-dark h1, .on-dark h2, .on-dark h3, .on-dark h4 { color: var(--mist); }

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

section { padding: clamp(4rem, 8vw, 7rem) 0; }

.section-dark {
  background: var(--ink);
  position: relative;
}

.section-dark > .container { position: relative; z-index: 1; }

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 1.1rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-brand-mark {
  width: 38px;
  height: 38px;
  display: block;
  object-fit: contain;
  flex-shrink: 0;
}

.nav-brand-text {
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.015em;
  line-height: 1.1;
}

.nav-brand-text .sub {
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel);
  display: block;
  margin-top: 3px;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
  list-style: none;
}

.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--steel);
  transition: color 0.15s;
  position: relative;
}

.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -7px;
  height: 2px;
  background: var(--signal);
}

.nav-cta {
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.65rem 1.25rem;
  background: var(--ink);
  color: var(--mist);
  transition: background 0.15s;
  letter-spacing: -0.005em;
}

.nav-cta:hover { background: var(--signal); }

.nav-toggle { display: none; }

@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-toggle {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--line);
  }
  .nav-toggle span { width: 18px; height: 1px; background: var(--ink); display: block; position: relative; }
  .nav-toggle span::before, .nav-toggle span::after {
    content: ''; position: absolute; left: 0; right: 0; height: 1px; background: var(--ink);
  }
  .nav-toggle span::before { top: -6px; }
  .nav-toggle span::after { top: 6px; }

  .nav.open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--mist);
    border-bottom: 1px solid var(--line);
    padding: 1.5rem var(--gutter);
    gap: 1.2rem;
    align-items: flex-start;
  }
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.95rem 1.6rem;
  transition: all 0.15s ease;
  border: 1px solid transparent;
  letter-spacing: -0.005em;
}

.btn-primary { background: var(--mist); color: var(--ink); }
.btn-primary:hover { background: var(--signal); color: var(--mist); }

.btn-primary-dark { background: var(--ink); color: var(--mist); }
.btn-primary-dark:hover { background: var(--signal); }

.btn-ghost { background: transparent; color: var(--mist); border-color: rgba(255, 255, 255, 0.25); }
.btn-ghost:hover { border-color: var(--signal); color: var(--signal); background: rgba(10, 31, 143, 0.1); }

.btn-ghost-dark { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-ghost-dark:hover { background: var(--ink); color: var(--mist); }

.btn .arr { transition: transform 0.2s ease; }
.btn:hover .arr { transform: translateX(4px); }

/* ============================================
   CLASSIFICATION HEADER
   ============================================ */

.classify {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  margin-bottom: 2.5rem;
  color: var(--silver);
  flex-wrap: wrap;
}

.classify .pill {
  padding: 0.25rem 0.55rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.classify .pill.signal {
  color: var(--mist);
  background: var(--signal);
  border-color: var(--signal);
}

.classify.light {
  color: var(--steel);
  border-color: var(--line);
}
.classify.light .pill { border-color: var(--line); }
.classify.light .pill.signal {
  color: var(--mist);
  background: var(--signal);
  border-color: var(--signal);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  background: var(--ink);
  color: var(--silver);
  padding: 5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 4rem;
  border-bottom: 1px solid var(--line-dark);
}

.footer-brand .logo-block {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.footer-brand .mark {
  width: 56px;
  height: 56px;
  display: block;
  object-fit: contain;
  flex-shrink: 0;
}

.footer-brand .name {
  font-family: var(--sans);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--mist);
  letter-spacing: -0.015em;
}

.footer-brand .tagline {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver);
  margin-top: 2px;
}

.footer-brand p {
  color: var(--silver);
  font-size: 0.88rem;
  max-width: 38ch;
}

.footer-col h5 {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
  margin-bottom: 1.2rem;
}

.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }
.footer-col a { font-size: 0.88rem; color: var(--silver); transition: color 0.15s; }
.footer-col a:hover { color: var(--mist); }

.footer-bottom {
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--silver);
  gap: 1rem;
  flex-wrap: wrap;
}

@media (max-width: 880px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer-brand { grid-column: span 2; }
}

@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: span 1; }
}

/* ============================================
   PAGE HEADER (interior pages)
   ============================================ */

.page-header {
  background: var(--ink);
  color: var(--mist);
  padding: 8rem 0 5rem;
  position: relative;
}

.page-header .container { position: relative; z-index: 1; }
.page-header h1 { color: var(--mist); margin: 1rem 0 1.5rem; }
.page-header p { color: #B5B5B5; max-width: 55ch; font-size: 1.05rem; }

/* ============================================
   ANIMATIONS
   ============================================ */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

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

.divider {
  height: 1px;
  background: var(--line);
  margin: 4rem 0;
}

.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); }

@media (max-width: 880px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

@media (min-width: 560px) and (max-width: 880px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}


/* ============================================
   PAGE HEADER WATERMARK (interior pages)
   ============================================ */

.page-header { overflow: hidden; }

.page-header-watermark {
  position: absolute;
  top: 50%;
  right: -8%;
  transform: translateY(-50%);
  width: 540px;
  height: 540px;
  opacity: 0.22;
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

@media (max-width: 880px) {
  .page-header-watermark {
    width: 360px;
    height: 360px;
    right: -25%;
    opacity: 0.12;
  }
}