:root {
  --bg: #06141f;
  --bg-alt: #0b1f2d;
  --card: #0f2435;
  --accent: #21b477;
  --accent-soft: rgba(33, 180, 119, 0.15);
  --text-main: #f5f9ff;
  --text-muted: #9fb2c8;
  --border-subtle: #1f3345;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.4);
  --radius-lg: 18px;
  --radius-pill: 999px;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background: radial-gradient(circle at top, #12263a 0, #040b12 55%, #01060b 100%);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 5vw;
  background: linear-gradient(to bottom, rgba(4, 11, 18, 0.95), rgba(4, 11, 18, 0.7));
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(61, 104, 148, 0.4);
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo {
  width: 44px;
  height: 44px;
  border-radius: 999px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.6);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.brand-name {
  font-weight: 650;
  letter-spacing: 0.06em;
  font-size: 0.85rem;
  text-transform: uppercase;
}

.brand-tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.main-nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-link {
  font-size: 0.85rem;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  color: var(--text-muted);
  transition: all 0.18s ease-out;
  background: transparent;
}

.nav-link:hover {
  color: var(--text-main);
  border-color: rgba(117, 189, 255, 0.4);
  background: rgba(3, 157, 122, 0.12);
}

.hero {
  padding: 4rem 7vw 3rem;
}

.hero-inner {
  max-width: 880px;
  margin: 0 auto;
  background: radial-gradient(circle at top left, rgba(67, 209, 149, 0.28), transparent 58%),
              linear-gradient(135deg, #071220, #050c16);
  border-radius: 26px;
  padding: 2.8rem 2.3rem;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(68, 159, 214, 0.38);
}

.hero h1 {
  font-size: clamp(1.9rem, 3vw, 2.4rem);
  line-height: 1.25;
  margin-bottom: 0.85rem;
}

.hero-tagline {
  font-size: 0.99rem;
  color: var(--text-muted);
  max-width: 640px;
}

main {
  padding: 0 7vw 3.5rem;
}

.section-block {
  margin: 1.7rem auto;
  max-width: 920px;
}

.section-inner {
  background: linear-gradient(145deg, rgba(7, 25, 38, 0.96), rgba(2, 10, 18, 0.98));
  border-radius: var(--radius-lg);
  padding: 1.9rem 1.8rem;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(40, 97, 150, 0.6);
}

.section-inner h2 {
  font-size: 1.3rem;
  margin-bottom: 0.4rem;
}

.section-lead {
  font-size: 0.94rem;
  color: var(--text-muted);
  margin-bottom: 0.7rem;
}

.section-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.45rem 1.5rem;
  margin-top: 0.4rem;
}

.section-list li {
  position: relative;
  padding-left: 1.05rem;
  font-size: 0.9rem;
  color: #d1e0f5;
}

.section-list li::before {
  content: "●";
  position: absolute;
  left: 0;
  top: 0.07rem;
  font-size: 0.55rem;
  color: var(--accent);
}

.site-footer {
  border-top: 1px solid rgba(34, 77, 118, 0.85);
  padding: 1.8rem 7vw 2.4rem;
  background: radial-gradient(circle at top, #091521, #03070d 60%);
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
}

.site-footer p + p {
  margin-top: 0.5rem;
}

.copyright {
  color: #7aa3cf;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

@media (max-width: 720px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.7rem;
  }

  .hero {
    padding-inline: 5vw;
  }

  main {
    padding-inline: 5vw;
  }

  .section-inner {
    padding: 1.5rem 1.3rem;
  }
}