:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1c2330;
  --muted: #5f6b7a;
  --line: #dde3ea;
  --accent: #1f4b99;
  --accent-hover: #173a77;
  --maxw: 1040px;
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: Inter, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

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

.page {
  min-height: 100vh;
}

.site-header {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 24px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.04em;
}

.nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 48px 20px 24px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
}

h1 {
  margin: 0 0 16px;
  font-size: 42px;
  line-height: 1.15;
}

h2 {
  margin-top: 0;
  font-size: 22px;
}

.lead {
  max-width: 760px;
  font-size: 18px;
  color: var(--muted);
}

.card-grid {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card,
.content-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 4px 18px rgba(16, 24, 40, 0.04);
}

.card {
  padding: 22px;
}

.content-block {
  max-width: var(--maxw);
  margin: 20px auto;
  padding: 28px 20px;
}

.site-footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px;
  color: var(--muted);
}

.button {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
}

.button:hover {
  background: var(--accent-hover);
  color: #fff;
}

.error-page {
  display: grid;
  place-items: center;
  padding: 40px 20px;
}

@media (max-width: 860px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 32px;
  }

  .site-header {
    gap: 16px;
    align-items: flex-start;
    flex-direction: column;
  }
}