/* =============================================
   DEPLOYREADY — Design Tokens & Styles
   Dark mode only. Navy + Teal GovCon aesthetic.
   ============================================= */

:root {
  /* Typography */
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Fluid Type Scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);

  /* Spacing (4px base) */
  --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;

  /* Colors — Dark Navy Theme */
  --color-bg: #0F172A;
  --color-surface: #1E293B;
  --color-surface-2: #283548;
  --color-surface-offset: #162032;
  --color-border: rgba(148, 163, 184, 0.12);
  --color-border-strong: rgba(148, 163, 184, 0.2);
  --color-divider: rgba(148, 163, 184, 0.08);

  /* Text */
  --color-text: #E2E8F0;
  --color-text-muted: #94A3B8;
  --color-text-faint: #64748B;

  /* Primary Accent — Teal */
  --color-primary: #0D9488;
  --color-primary-hover: #0F766E;
  --color-primary-active: #115E59;
  --color-primary-glow: rgba(13, 148, 136, 0.15);

  /* Danger */
  --color-danger: #EF4444;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* Transition */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* =============================================
   CONTAINER
   ============================================= */
.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-8);
  }
}

/* =============================================
   HEADER
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .header-inner {
    padding: var(--space-4) var(--space-8);
  }
}

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}

.logo-link .logo-icon {
  width: 28px;
  height: 28px;
}

.logo-text {
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.header-nav {
  display: none;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .header-nav {
    display: flex;
  }
}

.header-nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 400;
  letter-spacing: 0.01em;
}

.header-nav a:hover {
  color: var(--color-text);
}

.header-actions {
  display: none;
  margin-left: auto;
}

@media (min-width: 768px) {
  .header-actions {
    display: flex;
  }
}

.mobile-menu-btn {
  display: flex;
  margin-left: auto;
  color: var(--color-text-muted);
  padding: var(--space-2);
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }
}

.mobile-menu {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.mobile-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-base);
  padding: var(--space-2) 0;
}

.mobile-nav a:hover {
  color: var(--color-text);
}

/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-5);
  white-space: nowrap;
  line-height: 1.4;
}

.btn-sm {
  padding: var(--space-1) var(--space-4);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border: 1px solid transparent;
}

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

.btn-primary:active {
  background: var(--color-primary-active);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-strong);
}

.btn-ghost:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
  background: rgba(148, 163, 184, 0.05);
}

/* =============================================
   BADGE
   ============================================= */
.badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-primary-glow);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid rgba(13, 148, 136, 0.2);
  letter-spacing: 0.02em;
}

/* =============================================
   SECTION COMMON
   ============================================= */
.section {
  padding-block: clamp(var(--space-12), 6vw, var(--space-24));
}

.section-header {
  margin-bottom: clamp(var(--space-8), 4vw, var(--space-16));
}

.section-eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.1;
  margin-bottom: var(--space-4);
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 56ch;
  line-height: 1.7;
}

/* =============================================
   HERO
   ============================================= */
.hero {
  position: relative;
  padding: clamp(var(--space-20), 10vw, var(--space-32)) 0 clamp(var(--space-12), 6vw, var(--space-24));
  overflow: hidden;
}

.hero-bg-pattern {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(13, 148, 136, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(13, 148, 136, 0.04), transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .hero-content {
    padding-inline: var(--space-8);
  }
}

.hero-badge {
  margin-bottom: var(--space-6);
}

.hero-headline {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.08;
  margin-bottom: var(--space-6);
  max-width: 18ch;
}

.hero-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 52ch;
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.stat-number {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}

.stat-divider {
  width: 1px;
  height: 2.5rem;
  background: var(--color-border-strong);
}

/* =============================================
   PROBLEM SECTION
   ============================================= */
.section-problem {
  background: var(--color-surface-offset);
}

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

@media (min-width: 640px) {
  .problem-grid {
    grid-template-columns: 1fr 1fr;
  }
  .problem-card-wide {
    grid-column: 1 / -1;
  }
}

.problem-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.problem-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(239, 68, 68, 0.08);
  color: #EF4444;
}

.problem-content h3 {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.problem-content p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* =============================================
   FEATURES SECTION
   ============================================= */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

.feature-card {
  padding: var(--space-6);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  position: relative;
}

.feature-card:hover {
  border-color: var(--color-border-strong);
  background: var(--color-surface-2);
}

.feature-number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--space-4);
  letter-spacing: 0.04em;
}

.feature-card h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.25;
}

.feature-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* =============================================
   HOW IT WORKS
   ============================================= */
.section-how {
  background: var(--color-surface-offset);
}

.steps-grid {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .steps-grid {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-4);
  }
}

.step-card {
  flex: 1;
  padding: var(--space-6);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.step-number {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--color-primary-glow);
  color: var(--color-primary);
  font-weight: 700;
  font-size: var(--text-lg);
  margin-bottom: var(--space-4);
  border: 1px solid rgba(13, 148, 136, 0.25);
}

.step-card h3 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.step-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

.step-connector {
  display: none;
  align-items: center;
  padding-top: var(--space-8);
}

@media (min-width: 768px) {
  .step-connector {
    display: flex;
  }
}

/* =============================================
   AUDIENCE / WHO IT'S FOR
   ============================================= */
.audience-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .audience-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .audience-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

.audience-card {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.audience-card svg {
  margin-bottom: var(--space-4);
  width: 24px;
  height: 24px;
}

.audience-card h3 {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.audience-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* =============================================
   TRUST / SOCIAL PROOF
   ============================================= */
.section-trust {
  background: var(--color-surface-offset);
}

.trust-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}

@media (min-width: 768px) {
  .trust-layout {
    grid-template-columns: 1.3fr 1fr;
    gap: var(--space-16);
    align-items: start;
  }
}

.trust-main .section-eyebrow {
  margin-bottom: var(--space-3);
}

.trust-main .section-title {
  margin-bottom: var(--space-6);
}

.trust-bio {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.trust-bio strong {
  color: var(--color-text);
  font-weight: 600;
}

.trust-stat-callout {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-5);
  background: var(--color-primary-glow);
  border: 1px solid rgba(13, 148, 136, 0.2);
  border-radius: var(--radius-lg);
}

.trust-stat-number {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.trust-stat-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.certs-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
}

.certs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.cert-badge {
  padding: var(--space-4);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.cert-abbr {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.cert-full {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.4;
}

.powered-by {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.powered-by strong {
  color: var(--color-text);
  font-weight: 600;
}

.powered-shield {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* =============================================
   CTA SECTION
   ============================================= */
.section-cta {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.cta-block {
  text-align: center;
  max-width: 600px;
  margin-inline: auto;
}

.cta-headline {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.cta-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  margin-inline: auto;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
}

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-10) 0 var(--space-6);
  background: var(--color-surface-offset);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-brand .logo-link {
  margin-bottom: var(--space-3);
}

.footer-brand .logo-icon {
  width: 20px;
  height: 20px;
}

.footer-brand .logo-text {
  font-size: var(--text-xs);
}

.footer-company {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-links h4 {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-3);
}

.footer-links a {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  text-decoration: none;
  padding: var(--space-1) 0;
}

.footer-links a:hover {
  color: var(--color-text-muted);
}

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  max-width: 100%;
}

.footer-copy {
  margin-top: var(--space-2);
}

/* =============================================
   SCROLL ANIMATIONS
   ============================================= */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.stagger > .fade-up:nth-child(2) { transition-delay: 60ms; }
.stagger > .fade-up:nth-child(3) { transition-delay: 120ms; }
.stagger > .fade-up:nth-child(4) { transition-delay: 180ms; }
.stagger > .fade-up:nth-child(5) { transition-delay: 240ms; }
.stagger > .fade-up:nth-child(6) { transition-delay: 300ms; }

/* =============================================
   SUBTLE GRID PATTERN ON HERO
   ============================================= */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black, transparent);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black, transparent);
}

/* =============================================
   HEADER SCROLL STATES
   ============================================= */
.site-header.scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(15, 23, 42, 0.97);
}