:root {
  --bg: #0f172a;
  --bg-soft: #1e293b;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --primary: #38bdf8;
  --primary-dark: #0ea5e9;
  --card: #111827;
  --max-width: 1040px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, var(--bg) 0%, #020617 100%);
  line-height: 1.6;
}

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: rgba(2, 6, 23, 0.75);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4rem;
  gap: 1rem;
}

.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.menu-toggle {
  display: none;
  border: 1px solid rgba(148, 163, 184, 0.3);
  background: transparent;
  color: var(--text);
  padding: 0.5rem 0.75rem;
  border-radius: 0.4rem;
  cursor: pointer;
}

.nav-links {
  display: flex;
  gap: 1.25rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a:focus {
  color: var(--primary);
}

.hero {
  padding: 6rem 0 4rem;
}

.hero-content {
  max-width: 720px;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.15;
  margin: 0 0 1rem;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-top: 0;
}

.hero p,
.narrow,
.site-footer p {
  color: var(--text-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.btn {
  text-decoration: none;
  border-radius: 0.6rem;
  padding: 0.7rem 1rem;
  font-weight: 600;
  display: inline-block;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--primary);
  color: #0c162a;
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--primary-dark);
}

.btn-secondary {
  color: var(--text);
  border-color: rgba(148, 163, 184, 0.4);
}

.section {
  padding: 4rem 0;
}

.alt {
  background: rgba(30, 41, 59, 0.35);
  border-top: 1px solid rgba(148, 163, 184, 0.2);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 0.9rem;
  padding: 1.2rem;
}

.card h3 {
  margin-top: 0;
}

.site-footer {
  padding: 3.5rem 0;
}

.footer-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

@media (max-width: 800px) {
  .menu-toggle {
    display: inline-block;
  }

  .nav-links {
    position: absolute;
    top: 4rem;
    right: 1rem;
    min-width: 180px;
    flex-direction: column;
    padding: 0.8rem;
    border-radius: 0.7rem;
    border: 1px solid rgba(148, 163, 184, 0.22);
    background: rgba(15, 23, 42, 0.96);
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

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

  .footer-wrap {
    flex-direction: column;
    align-items: flex-start;
  }
}