:root {
  --primary: #0b4f7d;
  --secondary: #1a7fb3;
  --accent: #f28c00;
  --accent-hover: #d97706;
  --text: #1f2933;
  --text-muted: #6b7280;
  --bg: #ffffff;
  --section-bg: #f5f7fa;
  --footer-bg: #0b2e4c;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.narrow {
  width: min(900px, 92%);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.9rem 0;
}

.brand {
  color: var(--primary);
  font-weight: 800;
  text-decoration: none;
  font-size: 1.25rem;
}

.menu {
  list-style: none;
  display: flex;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  align-items: center;
}

.menu a {
  color: var(--text);
  text-decoration: none;
  padding: 0.45rem 0.75rem;
  border-radius: 0.45rem;
  font-weight: 600;
}

.menu a:hover {
  color: var(--accent);
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: 0.5rem;
  padding: 0.7rem 1.1rem;
  font-weight: 700;
}

.btn:hover,
.btn:focus-visible {
  background: var(--accent-hover);
}

.btn-nav {
  margin-left: 0.3rem;
}

.hero {
  padding: 5.2rem 0 4.2rem;
  background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--secondary);
  font-weight: 700;
  margin-bottom: 0.6rem;
}

h1,
h2,
h3 {
  line-height: 1.25;
  margin-top: 0;
  color: var(--primary);
}

h1 {
  font-size: clamp(2rem, 3.8vw, 3rem);
  max-width: 18ch;
  margin-bottom: 1rem;
}

.lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 70ch;
}

.section {
  padding: 4.25rem 0;
}

.section-alt {
  background: var(--section-bg);
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.3rem;
}

.card {
  background: #fff;
  border: 1px solid #e8edf3;
  border-left: 4px solid var(--secondary);
  border-radius: 0.75rem;
  padding: 1rem 1rem 0.9rem;
}

.realizations {
  margin: 1rem 0 0;
  padding-left: 1.25rem;
}

.realizations li {
  margin-bottom: 0.55rem;
}

details {
  border: 1px solid #dbe3eb;
  border-radius: 0.6rem;
  padding: 0.9rem 1rem;
  background: #fff;
  margin-bottom: 0.75rem;
}

summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--primary);
}

.site-footer {
  background: var(--footer-bg);
  color: #fff;
  padding: 2.5rem 0;
}

.site-footer h2 {
  color: #fff;
}

@media (max-width: 900px) {
  .nav-wrap {
    flex-direction: column;
    align-items: flex-start;
  }

  .menu {
    flex-wrap: wrap;
  }

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