:root {
  --bg-top: #020617;
  --bg-bottom: #0f172a;
  --text: #e5e7eb;
  --muted: #94a3b8;

  --accent-external: #38bdf8;
  --accent-external-text: #082f49;
  --accent-internal: #6ed2ff;
  --accent-internal-text: #082f49;

  --border-soft: rgba(148, 163, 184, 0.15);
  --border-strong: rgba(148, 163, 184, 0.22);

  --radius: 1.25rem;
  --radius-lg: 1.6rem;

  --shadow: 0 1rem 3rem rgba(0, 0, 0, 0.22);
  --shadow-hover: 0 1.4rem 3.8rem rgba(0, 0, 0, 0.32);

  --content-width: min(94vw, 78rem);

  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4rem;

  --font-sm: 0.95rem;
  --font-base: 1rem;
  --font-lg: 1.125rem;
  --font-xl: clamp(1.8rem, 4vw, 3rem);
  --font-hero: clamp(2.35rem, 7vw, 5rem);

  --nav-height: 4.75rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 100%;
  background: var(--bg-top);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  font-size: var(--font-base);
  line-height: 1.6;
  background:
    radial-gradient(circle at top, rgba(56, 189, 248, 0.12), transparent 35%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
  background-color: var(--bg-top);
  color: var(--text);
}

main {
  display: grid;
  gap: clamp(2.5rem, 6vw, 5rem);
  padding-bottom: var(--space-6);
}

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

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

a:focus-visible,
button:focus-visible {
  outline: 0.14rem solid var(--accent-external);
  outline-offset: 0.16rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(0.9rem);
  background: rgba(2, 6, 23, 0.76);
  border-bottom: 0.08rem solid rgba(148, 163, 184, 0.14);
}

.nav {
  width: var(--content-width);
  min-height: var(--nav-height);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  flex-wrap: wrap;
}

.brand {
  font-size: var(--font-lg);
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
}

.nav-links a {
  color: var(--muted);
  padding: 0.55rem 0.85rem;
  border-radius: 999rem;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
  background: rgba(148, 163, 184, 0.08);
  transform: translateY(-0.08rem);
}

.hero {
  width: var(--content-width);
  margin: 0 auto;
  display: grid;
  align-items: center;
  padding: clamp(1.25rem, 4vw, 2.5rem) 0 0;
}

.hero-card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(17, 24, 39, 0.86), rgba(15, 23, 42, 0.92));
  border: 0.08rem solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: clamp(1.5rem, 4vw, 3rem);
}

.hero-card::before {
  content: "";
  position: absolute;
  inset: auto auto -20% -10%;
  width: 18rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.18), transparent 70%);
  pointer-events: none;
}

.eyebrow {
  color: var(--accent-external);
  font-size: var(--font-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-2);
}

h1,
h2 {
  text-wrap: balance;
}

h1 {
  margin: 0 0 var(--space-3);
  font-size: var(--font-hero);
  line-height: 1.04;
  max-width: 12ch;
}

.hero-text {
  max-width: 65ch;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
  margin: 0 0 var(--space-4);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: stretch;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 10rem;
  min-height: 3rem;
  padding: 0.9rem 1.35rem;
  border-radius: 999rem;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  transition:
    transform 0.2s ease,
    opacity 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-0.12rem);
  opacity: 0.98;
}

.button-primary {
  background: var(--accent-external);
  color: var(--accent-external-text);
  box-shadow: 0 0.6rem 1.5rem rgba(56, 189, 248, 0.2);
}

.button-primary:hover,
.button-primary:focus-visible {
  box-shadow: 0 0.9rem 2rem rgba(56, 189, 248, 0.28);
}

.button-primary[href^="/"] {
  background: var(--accent-internal);
  color: var(--accent-internal-text);
  box-shadow: 0 0.6rem 1.5rem rgba(110, 210, 255, 0.22);
}

.button-primary[href^="/"]:hover,
.button-primary[href^="/"]:focus-visible {
  box-shadow: 0 0.9rem 2rem rgba(110, 210, 255, 0.3);
}

.section {
  width: var(--content-width);
  margin: 0 auto;
  padding: 0;
}

.section-block {
  display: grid;
  gap: var(--space-2);
  align-content: start;
}

.section-title {
  font-size: var(--font-xl);
  margin: 0;
  line-height: 1.1;
}

.section-text {
  color: var(--muted);
  max-width: 85ch;
  margin: 0 0 var(--space-3);
}

.site-footer {
  width: var(--content-width);
  margin: var(--space-6) auto 0;
  padding: var(--space-5) 0 0;
  color: rgba(148, 163, 184, 0.55);
  border-top: 0.08rem solid rgba(148, 163, 184, 0.12);
}

.footer-links {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--muted);
  padding: 0.35rem 0.55rem;
  border-radius: 999rem;
  transition: background 0.2s ease, color 0.2s ease;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--text);
  background: rgba(148, 163, 184, 0.08);
}

@media (max-width: 56rem) {
  .nav {
    flex-direction: column;
    justify-content: center;
    align-items: stretch;
  }

  .brand {
    text-align: center;
  }

  .nav-links {
    justify-content: center;
  }

  h1 {
    max-width: none;
  }
}

@media (max-width: 48rem) {
  .hero {
    padding-top: var(--space-5);
  }

  .actions {
    flex-direction: column;
    align-items: stretch;
  }

  .button {
    width: 100%;
    min-width: 0;
  }
}