/* NexGen GxP AI — Website Stylesheet */
/* Version 1.0 | 2026-03-30 */

/* =============================================
   CSS Custom Properties (Design Tokens)
   ============================================= */
:root {
  /* Brand Colors */
  --color-navy:       #0B1F3A;
  --color-blue:       #1E6FBF;
  --color-green:      #00C48C;
  --color-cloud:      #F4F7FB;
  --color-steel:      #8A9BB0;
  --color-midnight:   #060F1C;
  --color-ice:        #7FB8E8;
  --color-text:       #2C3E50;
  --color-text-light: #5A6A7A;
  --color-white:      #FFFFFF;
  --color-border:     #D8E2EE;

  /* Typography */
  --font-sans: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  /* Spacing */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;
  --space-4xl: 6rem;

  /* Layout */
  --max-width: 1120px;
  --nav-height: 72px;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(11,31,58,0.08);
  --shadow-md: 0 4px 16px rgba(11,31,58,0.12);
  --shadow-lg: 0 8px 32px rgba(11,31,58,0.16);

  /* Transitions */
  --transition: 0.2s ease;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol { list-style: none; }

/* =============================================
   Typography
   ============================================= */
h1, h2, h3, h4, h5 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-navy);
}

h1 { font-size: clamp(2rem, 4vw, 3.25rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; font-weight: 600; }

p { margin-bottom: var(--space-md); }
p:last-child { margin-bottom: 0; }

.text-lg   { font-size: 1.125rem; line-height: 1.65; }
.text-sm   { font-size: 0.875rem; }
.text-mono { font-family: var(--font-mono); }
.text-muted { color: var(--color-text-light); }
.text-center { text-align: center; }

/* =============================================
   Layout
   ============================================= */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-4xl) 0;
}

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

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

.section--cloud {
  background: var(--color-cloud);
}

.section--midnight {
  background: var(--color-midnight);
  color: var(--color-white);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

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

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* =============================================
   Navigation
   ============================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

.nav__logo-mark {
  width: 40px;
  height: 40px;
}

.nav__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.nav__logo-primary {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-navy);
  letter-spacing: -0.03em;
}

.nav__logo-secondary {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.6875rem;
  color: var(--color-blue);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav__links a {
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--color-text);
  transition: color var(--transition);
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--color-blue);
}

.nav__cta {
  margin-left: var(--space-md);
}

/* =============================================
   Buttons
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.6875rem 1.375rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9375rem;
  line-height: 1;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-green);
  color: var(--color-navy);
  border-color: var(--color-green);
}

.btn--primary:hover {
  background: #00a878;
  border-color: #00a878;
  color: var(--color-navy);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,196,140,0.3);
}

.btn--secondary {
  background: transparent;
  color: var(--color-blue);
  border-color: var(--color-blue);
}

.btn--secondary:hover {
  background: var(--color-blue);
  color: var(--color-white);
}

.btn--outline-white {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.4);
}

.btn--outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.7);
  color: var(--color-white);
}

.btn--lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

/* =============================================
   Cards
   ============================================= */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card__icon {
  width: 44px;
  height: 44px;
  margin-bottom: var(--space-lg);
  color: var(--color-green);
}

.card__title {
  margin-bottom: var(--space-sm);
}

/* =============================================
   Hero Section
   ============================================= */
.hero {
  background: var(--color-navy);
  padding: var(--space-4xl) 0 var(--space-3xl);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(30,111,191,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0,196,140,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(0,196,140,0.12);
  border: 1px solid rgba(0,196,140,0.3);
  border-radius: 100px;
  padding: 0.3125rem 0.875rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-green);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-xl);
}

.hero__eyebrow::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--color-green);
  border-radius: 50%;
}

.hero__headline {
  font-size: clamp(2.25rem, 4.5vw, 3.5rem);
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.1;
  max-width: 800px;
  margin-bottom: var(--space-xl);
}

.hero__headline em {
  font-style: normal;
  color: var(--color-green);
}

.hero__subheadline {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-ice);
  max-width: 600px;
  margin-bottom: var(--space-2xl);
}

.hero__cta-group {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-3xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid rgba(255,255,255,0.08);
}

.hero__badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-steel);
  letter-spacing: 0.05em;
}

.hero__badge strong {
  color: var(--color-ice);
  font-weight: 500;
}

/* =============================================
   Pain Points / Features
   ============================================= */
.pain-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--color-green);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.section-intro {
  max-width: 640px;
  margin: 0 auto var(--space-3xl);
  text-align: center;
}

.section-intro p {
  color: var(--color-text-light);
  font-size: 1.0625rem;
}

/* =============================================
   Regulatory Badges
   ============================================= */
.reg-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}

.reg-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.4375rem 0.875rem;
  background: rgba(30,111,191,0.08);
  border: 1px solid rgba(30,111,191,0.2);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-blue);
  letter-spacing: 0.05em;
}

.reg-badge--dark {
  background: rgba(30,111,191,0.15);
  border-color: rgba(30,111,191,0.3);
  color: var(--color-ice);
}

/* =============================================
   Comparison Table
   ============================================= */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.compare-table thead {
  background: var(--color-navy);
  color: var(--color-white);
}

.compare-table th {
  padding: 1rem 1.25rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
}

.compare-table th:first-child {
  color: var(--color-steel);
  font-weight: 400;
}

.compare-table th.highlight {
  color: var(--color-green);
}

.compare-table td {
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

.compare-table tr:last-child td { border-bottom: none; }

.compare-table tbody tr:hover {
  background: var(--color-cloud);
}

.check { color: var(--color-green); font-weight: 700; }
.cross { color: var(--color-steel); }

/* =============================================
   Footer
   ============================================= */
.footer {
  background: var(--color-midnight);
  color: var(--color-steel);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-3xl);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  margin-bottom: var(--space-xl);
}

.footer__brand p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-steel);
  max-width: 300px;
  margin-top: var(--space-md);
}

.footer__col h4 {
  color: var(--color-white);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
}

.footer__col ul li + li { margin-top: var(--space-sm); }

.footer__col a {
  color: var(--color-steel);
  font-size: 0.9375rem;
  transition: color var(--transition);
}

.footer__col a:hover { color: var(--color-white); }

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
}

.footer__bottom p { margin: 0; color: var(--color-steel); }

/* =============================================
   Forms
   ============================================= */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--color-navy);
  margin-bottom: var(--space-xs);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.6875rem 0.875rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-white);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px rgba(30,111,191,0.12);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* =============================================
   Page Header (inner pages)
   ============================================= */
.page-header {
  background: var(--color-navy);
  padding: var(--space-3xl) 0;
}

.page-header__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-green);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.page-header h1 {
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.page-header p {
  color: var(--color-ice);
  font-size: 1.125rem;
  max-width: 600px;
  line-height: 1.7;
}

/* =============================================
   Utilities
   ============================================= */
.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); }
.mt-2xl { margin-top: var(--space-2xl); }

.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); }

.divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-2xl) 0;
}

/* =============================================
   Responsive
   ============================================= */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  :root { --space-4xl: 3.5rem; --space-3xl: 2.5rem; }

  .container { padding: 0 var(--space-lg); }
  .grid-2,
  .grid-3 { grid-template-columns: 1fr; }
  .nav__links { display: none; }
  .hero__cta-group { flex-direction: column; align-items: flex-start; }
  .footer__grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .footer__bottom { flex-direction: column; gap: var(--space-sm); text-align: center; }
}