/**
 * Nexus Talent Group (NTG) Enterprise Landing Page
 * Base CSS: Reset, Typography, Layout Containers & Global Utilities
 */

/* ==========================================================================
   1. Modern CSS Reset & Box Sizing
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: 1.6;
  color: var(--color-text-main);
  background-color: var(--color-bg-white);
  overflow-x: hidden;
  min-height: 100vh;
}

body.modal-open,
body.drawer-open {
  overflow: hidden;
}

/* Image & Media Elements */
img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Form Controls Reset */
input, button, textarea, select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
}

button {
  cursor: pointer;
}

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

ul, ol {
  list-style: none;
}

/* ==========================================================================
   2. Typography System & Hierarchy
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary-navy);
  font-weight: var(--font-weight-bold);
  line-height: 1.25;
  overflow-wrap: break-word;
}

h1 {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-extrabold);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  line-height: 1.35;
}

h4 {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  line-height: 1.4;
}

p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  overflow-wrap: break-word;
}

.text-lead {
  font-size: var(--font-size-md);
  line-height: 1.7;
}

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

.text-white {
  color: var(--color-text-inverse) !important;
}

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

.text-blue {
  color: var(--color-blue-deep) !important;
}

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

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

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

.font-bold {
  font-weight: var(--font-weight-bold);
}

.font-semibold {
  font-weight: var(--font-weight-semibold);
}

.font-medium {
  font-weight: var(--font-weight-medium);
}

.uppercase {
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ==========================================================================
   3. Section & Layout Containers
   ========================================================================== */
section[id] {
  scroll-margin-top: 84px;
  position: relative;
}

.section-padding {
  padding-top: var(--spacing-4xl);
  padding-bottom: var(--spacing-4xl);
}

.section-header {
  margin-bottom: var(--spacing-3xl);
}

.section-header.text-center {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.35rem 0.85rem;
  background-color: var(--color-accent-gold-light);
  color: var(--color-accent-gold-hover);
  border: 1px solid var(--color-accent-gold-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--spacing-sm);
}

.section-eyebrow.eyebrow-navy {
  background-color: var(--color-blue-soft);
  color: var(--color-blue-deep);
  border-color: rgba(11, 83, 148, 0.2);
}

.section-title {
  margin-bottom: var(--spacing-md);
  color: var(--color-primary-navy);
}

.section-subtitle {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Container Specifications */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
}

.container-compact {
  width: 100%;
  max-width: var(--container-compact-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}

.container-fluid {
  width: 100%;
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
}

/* Background Utility Classes */
.bg-white {
  background-color: var(--color-bg-white);
}

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

.bg-navy {
  background-color: var(--color-primary-navy);
  color: var(--color-text-inverse);
}

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

.bg-navy p {
  color: var(--color-text-subtle);
}

/* ==========================================================================
   4. Flexbox & Grid Utility Classes
   ========================================================================== */
.flex {
  display: flex;
}

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

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

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

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

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

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

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

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

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

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

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

.grid {
  display: grid;
}

/* Grid presets */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
}

.grid-2 > *,
.grid-3 > *,
.grid-4 > *,
.contact-layout > *,
.hero-split-grid > * {
  min-width: 0;
}

/* ==========================================================================
   5. Buttons System
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.75rem 1.5rem;
  font-family: var(--font-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.02em;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: all var(--transition-normal);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  line-height: 1.25;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent-gold);
  outline-offset: 2px;
}

/* Primary CTA Button - Gold */
.btn-primary,
.btn-gold {
  background-color: var(--color-accent-gold);
  color: var(--color-primary-navy);
  border-color: var(--color-accent-gold);
  box-shadow: var(--shadow-subtle);
  font-weight: var(--font-weight-bold);
}

.btn-primary:hover,
.btn-gold:hover {
  background-color: var(--color-accent-gold-hover);
  border-color: var(--color-accent-gold-hover);
  color: #FFFFFF;
  box-shadow: var(--shadow-gold-glow);
  transform: translateY(-1px);
}

.btn-primary:active,
.btn-gold:active {
  transform: translateY(0);
}

/* Secondary CTA Button - Corporate Outline / Solid Navy */
.btn-secondary,
.btn-navy {
  background-color: var(--color-primary-navy);
  color: var(--color-text-inverse);
  border-color: var(--color-primary-navy);
}

.btn-secondary:hover,
.btn-navy:hover {
  background-color: var(--color-navy-light);
  border-color: var(--color-navy-light);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary-navy);
  border-color: var(--color-border-subtle);
}

.btn-outline:hover {
  background-color: var(--color-bg-muted);
  border-color: var(--color-border-hover);
}

.btn-outline-gold {
  background-color: transparent;
  color: var(--color-accent-gold);
  border-color: var(--color-accent-gold);
}

.btn-outline-gold:hover {
  background-color: var(--color-accent-gold);
  color: #0F172A;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: var(--font-size-xs);
}

.btn-lg {
  padding: 0.9rem 1.85rem;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.btn:hover svg {
  transform: translateX(2px);
}

/* Accessibility: Screen Reader Only */
.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;
}