/* EIS Bridge Branding System v1.0 */

:root {
  --eis-blue: #0057D9;
  --bridge-teal: #00A8A8;
  --signal-yellow: #FFC300;
  --slate-gray: #2E3A45;
  --cloud-white: #F7F9FA;
  --graphite-black: #1A1A1A;

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max-width: 72rem;
  --radius: 0.5rem;
  --shadow-sm: 0 1px 3px rgba(26, 26, 26, 0.08);
  --shadow-md: 0 4px 16px rgba(26, 26, 26, 0.1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--graphite-black);
  background-color: var(--cloud-white);
}

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

a {
  color: var(--eis-blue);
}

a:focus-visible,
.btn:focus-visible {
  outline: 3px solid var(--signal-yellow);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--eis-blue);
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius);
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

/* Header */

.site-header {
  background: #fff;
  border-bottom: 1px solid rgba(46, 58, 69, 0.12);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1rem;
  flex-wrap: wrap;
}

.logo {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.logo-mark {
  color: var(--eis-blue);
}

.logo-text {
  color: var(--graphite-black);
}

.tagline-badge {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--slate-gray);
  background: var(--cloud-white);
  border: 1px solid rgba(0, 87, 217, 0.2);
  border-radius: 999px;
}

/* Hero */

.hero {
  background: linear-gradient(135deg, #fff 0%, var(--cloud-white) 60%, rgba(0, 168, 168, 0.08) 100%);
  border-bottom: 1px solid rgba(46, 58, 69, 0.08);
}

.hero-inner {
  padding-block: 4rem 5rem;
  max-width: 42rem;
}

.hero h1 {
  margin: 0 0 1.25rem;
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--eis-blue);
}

.hero-subheader {
  margin: 0 0 2rem;
  font-size: clamp(1.0625rem, 2.5vw, 1.25rem);
  color: var(--slate-gray);
  max-width: 38rem;
}

/* Buttons */

.btn {
  display: inline-block;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background-color 0.2s, transform 0.15s, box-shadow 0.2s;
}

.btn-primary {
  color: #fff;
  background-color: var(--eis-blue);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: #0046b0;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* Sections */

section {
  padding-block: 4rem;
}

.section-title {
  margin: 0 0 2.5rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--eis-blue);
  text-align: center;
  letter-spacing: -0.02em;
}

/* Audience cards */

.audiences {
  background: #fff;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1.5rem;
}

.audience-card {
  padding: 1.75rem;
  background: var(--cloud-white);
  border-radius: var(--radius);
  border-top: 3px solid var(--bridge-teal);
  box-shadow: var(--shadow-sm);
}

.audience-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--eis-blue);
}

.audience-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--slate-gray);
}

/* Editions */

.editions {
  background: var(--cloud-white);
}

.editions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1.25rem;
}

.edition-card {
  padding: 1.5rem;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid rgba(46, 58, 69, 0.1);
  box-shadow: var(--shadow-sm);
}

.edition-card--featured {
  border-color: var(--eis-blue);
  border-width: 2px;
  background: linear-gradient(to bottom, rgba(0, 87, 217, 0.04), #fff);
}

.edition-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--eis-blue);
}

.edition-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--slate-gray);
}

/* Pillars */

.pillars {
  background: var(--slate-gray);
  color: #fff;
}

.pillars .section-title {
  color: #fff;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1.25rem;
}

.pillar-card {
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  border-left: 3px solid var(--bridge-teal);
}

.pillar-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--signal-yellow);
}

.pillar-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: rgba(247, 249, 250, 0.88);
}

/* CTA band */

.cta-band {
  background: linear-gradient(135deg, var(--eis-blue) 0%, #0046b0 100%);
  color: #fff;
  text-align: center;
}

.cta-inner {
  max-width: 36rem;
}

.cta-band h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.375rem, 3vw, 1.75rem);
  font-weight: 700;
}

.cta-band p {
  margin: 0 0 1.75rem;
  opacity: 0.92;
}

.cta-band .btn-primary {
  background: #fff;
  color: var(--eis-blue);
}

.cta-band .btn-primary:hover {
  background: var(--cloud-white);
  color: #0046b0;
}

/* Footer */

.site-footer {
  background: var(--graphite-black);
  color: rgba(247, 249, 250, 0.85);
  padding-block: 2.5rem;
}

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

.footer-positioning {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  max-width: 40rem;
  margin-inline: auto;
  line-height: 1.65;
}

.footer-disclaimer {
  margin: 0 0 0.75rem;
  font-size: 0.8125rem;
  max-width: 40rem;
  margin-inline: auto;
  line-height: 1.6;
  color: rgba(247, 249, 250, 0.65);
}

.footer-ip {
  margin: 0 0 0.75rem;
  font-size: 0.8125rem;
  color: rgba(0, 168, 168, 0.85);
  letter-spacing: 0.01em;
}

.footer-copy {
  margin: 0;
  font-size: 0.8125rem;
  color: rgba(247, 249, 250, 0.55);
}

.footer-links {
  margin: 0 0 0.75rem;
  font-size: 0.875rem;
}

.footer-links a {
  color: rgba(247, 249, 250, 0.9);
  text-decoration: none;
}

.footer-links a:hover {
  text-decoration: underline;
}

.ip-notice-bar {
  background: rgba(0, 87, 217, 0.08);
  border-bottom: 1px solid rgba(0, 87, 217, 0.12);
  color: var(--slate-gray);
  font-size: 0.8125rem;
  font-weight: 500;
  text-align: center;
  padding: 0.45rem 1rem;
  letter-spacing: 0.01em;
}

.section-lead {
  text-align: center;
  max-width: 42rem;
  margin: -0.5rem auto 2rem;
  color: var(--slate-gray);
  font-size: 1.0625rem;
  line-height: 1.65;
}

.btn-secondary {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--eis-blue);
  background: #fff;
  border: 2px solid var(--eis-blue);
  border-radius: var(--radius);
  text-decoration: none;
  transition: background-color 0.15s, color 0.15s;
}

.btn-secondary:hover {
  background: rgba(0, 87, 217, 0.06);
}

/* Responsive tweaks */

@media (max-width: 480px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-inner {
    padding-block: 2.5rem 3.5rem;
  }

  section {
    padding-block: 3rem;
  }

  .btn {
    display: block;
    text-align: center;
  }
}

@media (min-width: 768px) {
  .pillars-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .pillars-grid .pillar-card:nth-child(4),
  .pillars-grid .pillar-card:nth-child(5) {
    grid-column: span 1;
  }
}

@media (min-width: 1024px) {
  .pillars-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}