:root {
  --bg: #eef4ff;
  --bg-soft: #e4edff;
  --surface: #f7f9fd;
  --surface-alt: #ffffff;
  --text-dark: #111a2d;
  --text-light: #f4f8ff;
  --muted-dark: #5b6885;
  --muted-light: #b6c5e4;
  --line: rgba(18, 31, 56, 0.14);
  --line-light: rgba(181, 199, 232, 0.26);
  --accent: #4a90ff;
  --shadow-lg: 0 26px 64px rgba(7, 16, 32, 0.32);
  --shadow-md: 0 12px 34px rgba(12, 24, 46, 0.14);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Source Sans 3", sans-serif;
  color: var(--text-dark);
  background: linear-gradient(180deg, #f8fbff 0%, #f1f6ff 48%, #eaf1ff 100%);
}

.container {
  width: min(1160px, 92vw);
  margin-inline: auto;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 100;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: 0;
  box-shadow: none;
  transition: background 0.25s ease, backdrop-filter 0.25s ease;
}

.site-header.is-scrolled {
  background: rgba(8, 16, 31, 0.48);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #f4f8ff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
}

.brand img {
  width: 42px;
  border-radius: 10px;
}

.brand span,
h1,
h2,
h3 {
  font-family: "Montserrat", sans-serif;
}

.brand span {
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  font-weight: 800;
  letter-spacing: 0.05em;
}

.site-nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.site-nav a {
  color: #f4f8ff;
  text-decoration: none;
  font-size: 0.93rem;
  font-weight: 600;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
}

.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  align-items: center;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
      112deg,
      rgba(8, 16, 31, 0.72) 0%,
      rgba(8, 16, 31, 0.56) 54%,
      rgba(8, 16, 31, 0.5) 100%
    ),
    url("./main.jpg");
  background-size: cover;
  background-position: center 30%;
}

.hero-inner {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: clamp(32px, 8vw, 84px) 0;
}

.label {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.72rem;
  font-weight: 700;
  color: #9fc2ff;
}

h1 {
  margin: 16px 0 0;
  font-size: clamp(2.4rem, 6vw, 5.2rem);
  line-height: 0.98;
  letter-spacing: -0.03em;
  max-width: 11ch;
}

.hero h1 {
  color: #f3f8ff;
}

.hero-copy p {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: clamp(1.04rem, 1.9vw, 1.24rem);
  line-height: 1.62;
  color: var(--muted-light);
}

.hero-link {
  margin-top: 26px;
  display: inline-block;
  border: 1px solid rgba(157, 194, 255, 0.36);
  background: rgba(14, 30, 56, 0.72);
  color: #eaf2ff;
  text-decoration: none;
  font-weight: 700;
  padding: 10px 18px;
  border-radius: 999px;
}

.section {
  padding: 84px 0;
  scroll-margin-top: 88px;
}

.section-light {
  background: linear-gradient(180deg, #f4f7fc 0%, #edf2fb 100%);
  color: var(--text-dark);
}

.section-head {
  max-width: 760px;
}

h2 {
  margin: 14px 0 0;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.cards-grid {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.feature-card {
  background: var(--surface-alt);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow-md);
}

h3 {
  margin: 0;
  font-size: 1.08rem;
}

.feature-card p {
  margin: 10px 0 0;
  color: var(--muted-dark);
  line-height: 1.58;
}

.section-dark {
  background: linear-gradient(150deg, #142c54 0%, #1f3f70 100%);
  color: var(--text-light);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
  align-items: center;
}

.section-dark .muted {
  margin-top: 16px;
  color: var(--muted-light);
  line-height: 1.6;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.timeline li {
  padding: 8px 0 12px;
  border-radius: 0;
  border: 0;
  border-bottom: 1px solid rgba(181, 199, 232, 0.28);
  background: transparent;
  box-shadow: none;
  display: flex;
  gap: 10px;
  align-items: center;
}

.timeline strong {
  min-width: 34px;
  font-size: 0.78rem;
  color: #9fc2ff;
  font-weight: 700;
}

.timeline span {
  font-weight: 600;
  letter-spacing: 0.01em;
}

.section-image {
  background: #0b162a;
  padding: 0;
}

.image-band {
  width: 100%;
  position: relative;
  min-height: 520px;
  display: grid;
  align-items: end;
  background: linear-gradient(
      114deg,
      rgba(8, 16, 31, 0.9) 0%,
      rgba(8, 16, 31, 0.6) 55%,
      rgba(8, 16, 31, 0.44) 100%
    ),
    url("https://images.unsplash.com/photo-1522202176988-66273c2fd55f?auto=format&fit=crop&w=1900&q=80");
  background-size: cover;
  background-position: center;
  box-shadow: none;
}

.text-block {
  padding-top: clamp(72px, 10vw, 120px);
  padding-bottom: clamp(44px, 7vw, 88px);
  max-width: 740px;
}

.text-block h2 {
  color: #f2f7ff;
}

.text-block p {
  margin: 14px 0 0;
  color: #c5d5f2;
  font-size: 1.05rem;
  line-height: 1.65;
}

.contact-section {
  background: linear-gradient(180deg, #081327 0%, #0a1730 100%);
  padding-top: 36px;
  padding-bottom: 62px;
}

.contact-inner {
  padding: 10px 0;
}

.contact-inner h2 {
  color: #ffffff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.28);
}

.contact-inner p {
  margin: 10px 0 0;
  color: #e6f0ff;
}

.contact-inner a {
  display: inline-block;
  margin-top: 10px;
  color: #ffffff;
  text-decoration: none;
  font-weight: 700;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 1.25s ease, transform 1.25s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 {
  transition-delay: 0.22s;
}

.delay-2 {
  transition-delay: 0.38s;
}

@media (max-width: 1020px) {
  .cards-grid {
    grid-template-columns: 1fr 1fr;
  }

  .split {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .site-header {
    position: fixed;
  }

  .nav-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 14px 0;
  }

  .hero {
    min-height: 100vh;
  }

  .section {
    padding: 56px 0;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .image-band {
    min-height: 420px;
  }
}