/* ============================================================
   Cyber Polygon — design system
   ============================================================ */
:root {
  --blue-600: #2563eb;
  --blue-500: #3b82f6;
  --blue-400: #60a5fa;
  --cyan-400: #22d3ee;
  --navy-950: #070d1a;
  --navy-900: #0b1220;
  --navy-800: #111c33;
  --navy-700: #1c2a47;
  --ink-900: #0f172a;
  --ink-700: #334155;
  --ink-500: #64748b;
  --line: #e2e8f0;
  --bg: #ffffff;
  --bg-alt: #f6f8fb;
  --amber-500: #f59e0b;
  --green-500: #10b981;

  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: "Space Grotesk", "Inter", sans-serif;

  --radius: 16px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .05);
  --shadow-md: 0 10px 30px -12px rgba(15, 23, 42, .18);
  --container: 1160px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink-700);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink-900);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  padding: 13px 26px;
  border-radius: 999px;
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
  cursor: pointer;
}
.btn svg { width: 17px; height: 17px; }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--blue-600);
  color: #fff;
  box-shadow: 0 6px 18px -6px rgba(37, 99, 235, .55);
}
.btn-primary:hover { background: var(--blue-500); }

.btn-sm { padding: 9px 20px; font-size: 14px; }

.btn-light {
  background: #fff;
  color: var(--navy-900);
  box-shadow: 0 8px 24px -8px rgba(2, 8, 23, .5);
}
.btn-light:hover { color: var(--blue-600); }

.btn-ghost {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .35);
  background: rgba(255, 255, 255, .06);
  backdrop-filter: blur(4px);
}
.btn-ghost:hover { background: rgba(255, 255, 255, .14); border-color: rgba(255,255,255,.55); }

.btn-outline {
  color: var(--blue-600);
  border: 1.5px solid #c7d7f5;
  background: #fff;
}
.btn-outline:hover { border-color: var(--blue-600); background: #f5f9ff; }

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 232, 240, .8);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--blue-600), #1e40af);
  color: #fff;
  box-shadow: 0 4px 12px -4px rgba(37, 99, 235, .6);
}
.brand-mark svg { width: 21px; height: 21px; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink-900);
}
.brand-light .brand-name { color: #fff; }

.site-nav { display: flex; align-items: center; gap: 26px; }
.site-nav > a:not(.btn) {
  text-decoration: none;
  color: var(--ink-700);
  font-weight: 500;
  font-size: 15px;
  transition: color .15s ease;
}
.site-nav > a:not(.btn):hover,
.site-nav > a.active { color: var(--blue-600); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}
.nav-toggle span {
  width: 22px; height: 2px;
  background: var(--ink-900);
  border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero ============ */
.hero {
  position: relative;
  background: var(--navy-950);
  color: #fff;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(800px 420px at 50% -10%, rgba(37, 99, 235, .45), transparent 65%),
    radial-gradient(600px 380px at 85% 110%, rgba(34, 211, 238, .12), transparent 60%),
    linear-gradient(180deg, var(--navy-900), var(--navy-950));
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, .07) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 30%, transparent 75%);
}
.hero-inner {
  position: relative;
  text-align: center;
  padding: 108px 24px 88px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 500;
  color: #bfdbfe;
  background: rgba(59, 130, 246, .12);
  border: 1px solid rgba(96, 165, 250, .35);
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 28px;
}
.hero-badge svg { width: 16px; height: 16px; }
.hero-title {
  font-size: clamp(46px, 8vw, 84px);
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.025em;
  background: linear-gradient(180deg, #fff 55%, #93c5fd);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-subtitle {
  max-width: 720px;
  margin: 20px auto 0;
  font-size: clamp(17px, 2.4vw, 21px);
  color: #cbd5e1;
  line-height: 1.55;
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 38px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 860px;
  margin: 72px auto 0;
  padding-top: 40px;
  border-top: 1px solid rgba(148, 163, 184, .18);
}
.stat { display: grid; gap: 2px; }
.stat-value {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: #fff;
}
.stat-label { font-size: 13.5px; color: #94a3b8; }

/* ============ Sections ============ */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }

.section-head {
  max-width: 760px;
  margin: 0 auto 56px;
  text-align: center;
}
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--blue-600);
  background: #eaf1fe;
  border: 1px solid #d3e2fc;
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
}
.section-lead {
  margin-top: 16px;
  font-size: 17px;
  color: var(--ink-500);
}

/* ============ Scope ============ */
.scope-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: start;
}
.scope-text p + p { margin-top: 16px; }
.scope-text strong { color: var(--ink-900); }

.quote {
  margin-top: 28px;
  padding: 22px 26px;
  border-left: 4px solid var(--blue-600);
  background: linear-gradient(90deg, #eef4fe, #f8fafc);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.quote p {
  font-family: var(--font-display);
  font-size: 17.5px;
  font-weight: 500;
  color: var(--navy-800);
  line-height: 1.5;
}

.scope-cards { display: grid; gap: 22px; }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}
.card h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  margin-bottom: 18px;
}
.card-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.card-icon svg { width: 20px; height: 20px; }
.icon-warn { background: #fef3e2; color: var(--amber-500); }
.icon-check { background: #e5f7f0; color: var(--green-500); }

.challenge-card { border-top: 3px solid var(--amber-500); }
.solution-card { border-top: 3px solid var(--green-500); }

.list { list-style: none; display: grid; gap: 12px; }
.list li {
  position: relative;
  padding-left: 28px;
  font-size: 15.5px;
}
.list li::before {
  position: absolute;
  left: 0;
  top: 1px;
  font-weight: 700;
}
.list-dot li::before { content: "•"; color: var(--amber-500); font-size: 22px; line-height: 1; }
.list-check li::before { content: "✓"; color: var(--green-500); }

/* ============ Features (dark) ============ */
.section-dark {
  background:
    radial-gradient(720px 400px at 15% 0%, rgba(37, 99, 235, .22), transparent 60%),
    radial-gradient(600px 400px at 90% 100%, rgba(34, 211, 238, .1), transparent 60%),
    var(--navy-900);
  color: #cbd5e1;
}
.section-dark .section-head h2 { color: #fff; }
.section-dark .section-lead { color: #94a3b8; }
.section-dark .eyebrow {
  color: #93c5fd;
  background: rgba(59, 130, 246, .12);
  border-color: rgba(96, 165, 250, .3);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.feature-card {
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(148, 163, 184, .16);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(96, 165, 250, .5);
  background: rgba(59, 130, 246, .08);
}
.feature-icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(59, 130, 246, .28), rgba(34, 211, 238, .18));
  border: 1px solid rgba(96, 165, 250, .35);
  color: var(--blue-400);
  margin-bottom: 18px;
}
.feature-icon svg { width: 23px; height: 23px; }
.feature-card h3 { color: #fff; font-size: 17.5px; margin-bottom: 10px; }
.feature-card p { font-size: 14.5px; color: #94a3b8; }

.benefits {
  margin-top: 56px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(148, 163, 184, .16);
  border-radius: var(--radius);
  padding: 36px;
}
.benefits h3 { color: #fff; font-size: 21px; margin-bottom: 22px; }
.benefit-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 32px;
}
.benefit-grid li {
  position: relative;
  padding-left: 30px;
  font-size: 15px;
  color: #cbd5e1;
}
.benefit-grid li strong { color: var(--cyan-400); }
.benefit-grid li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: -1px;
  width: 20px; height: 20px;
  border-radius: 6px;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--cyan-400);
  background: rgba(34, 211, 238, .12);
  border: 1px solid rgba(34, 211, 238, .3);
}

/* ============ Objectives timeline ============ */
.timeline {
  list-style: none;
  max-width: 760px;
  margin: 0 auto;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 23px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue-400), var(--blue-600) 60%, #dbeafe);
}
.timeline-item {
  position: relative;
  display: flex;
  gap: 26px;
  padding: 0 0 36px 0;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-num {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  width: 48px; height: 48px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: #fff;
  background: linear-gradient(135deg, var(--blue-500), #1e40af);
  box-shadow: 0 0 0 5px #fff, 0 6px 14px -4px rgba(37, 99, 235, .5);
}
.timeline-body {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 26px;
  flex: 1;
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.timeline-item:hover .timeline-body {
  transform: translateX(4px);
  border-color: #bfd5f9;
  box-shadow: var(--shadow-md);
}
.timeline-body h3 { font-size: 17.5px; margin-bottom: 4px; }
.timeline-body p { font-size: 15px; color: var(--ink-500); }

/* ============ Consortium ============ */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
  max-width: 920px;
  margin: 0 auto;
}
.partner-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 36px 32px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease;
}
.partner-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.partner-role {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--blue-600);
  background: #eaf1fe;
  padding: 5px 14px;
  border-radius: 999px;
}
.partner-logo {
  height: 110px;
  display: grid;
  place-items: center;
  margin: 10px 0 4px;
}
.partner-logo img { max-height: 100px; width: auto; }
.partner-card h3 { font-size: 22px; }
.partner-org { font-weight: 600; font-size: 14.5px; color: var(--ink-900); }
.partner-card > p:not(.partner-role):not(.partner-org) { font-size: 14.5px; color: var(--ink-500); }
.partner-card .btn { margin-top: 12px; }

/* ============ Contact ============ */
.section-contact {
  background:
    radial-gradient(600px 300px at 50% 0%, #eaf1fe, transparent 70%),
    var(--bg);
}
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  max-width: 860px;
  margin: 0 auto;
}
.contact-card {
  display: flex;
  align-items: center;
  gap: 18px;
  text-decoration: none;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 26px;
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.contact-card:hover {
  transform: translateY(-3px);
  border-color: #bfd5f9;
  box-shadow: var(--shadow-md);
}
.contact-icon {
  flex-shrink: 0;
  width: 50px; height: 50px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #eaf1fe, #dbeafe);
  color: var(--blue-600);
}
.contact-icon svg { width: 24px; height: 24px; }
.contact-info { display: grid; gap: 1px; }
.contact-name { font-family: var(--font-display); font-weight: 600; font-size: 16.5px; color: var(--ink-900); }
.contact-role { font-size: 13px; color: var(--ink-500); }
.contact-email { font-size: 14.5px; font-weight: 600; color: var(--blue-600); margin-top: 4px; }

/* ============ Footer ============ */
.site-footer {
  background: var(--navy-950);
  color: #94a3b8;
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-about p { margin-top: 18px; font-size: 14.5px; max-width: 380px; }
.footer-about .brand-mark { box-shadow: none; }

.site-footer h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 16px;
}
.footer-nav { display: grid; gap: 10px; align-content: start; }
.footer-nav a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 14.5px;
  transition: color .15s ease;
  justify-self: start;
}
.footer-nav a:hover { color: #fff; }

.footer-nato {
  display: inline-block;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, .2);
  transition: border-color .15s ease;
}
.footer-nato:hover { border-color: rgba(148, 163, 184, .5); }
.footer-nato img { width: 100%; max-width: 340px; }

.footer-bottom {
  border-top: 1px solid rgba(148, 163, 184, .14);
  padding-top: 22px;
  padding-bottom: 22px;
  font-size: 13.5px;
  text-align: center;
}

/* ============ Reveal animation ============ */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ============ Responsive ============ */
@media (max-width: 960px) {
  .section { padding: 72px 0; }
  .scope-grid { grid-template-columns: 1fr; gap: 40px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-about { grid-column: 1 / -1; }
}

@media (max-width: 680px) {
  .site-nav {
    position: absolute;
    top: 68px;
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    padding: 10px 24px 18px;
    display: none;
  }
  .site-nav.open { display: flex; }
  .site-nav > a:not(.btn) { padding: 12px 0; font-size: 16px; }
  .site-nav > .btn { margin-top: 10px; justify-content: center; }
  .nav-toggle { display: flex; }

  .hero-inner { padding: 80px 24px 64px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 26px; }
  .feature-grid { grid-template-columns: 1fr; }
  .benefit-grid { grid-template-columns: 1fr; }
  .benefits { padding: 26px 22px; }
  .partner-grid, .contact-grid { grid-template-columns: 1fr; }
  .timeline::before { left: 19px; }
  .timeline-num { width: 40px; height: 40px; font-size: 16px; }
  .timeline-item { gap: 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
}