:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --text: #102033;
  --muted: #526173;
  --line: #d9e2ec;
  --brand: #0f172a;
  --accent: #0f766e;
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.10), transparent 28rem),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 100%);
}

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

a:hover {
  text-decoration: underline;
}

.wrap {
  width: min(1100px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header,
.site-footer {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px);
}

.site-header .wrap,
.site-footer .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--brand);
}

.nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero {
  padding: 5rem 0 2rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 700;
}

.hero h1,
.prose h1 {
  margin: 0;
  line-height: 1.1;
  font-size: clamp(2rem, 5vw, 4rem);
}

.lead {
  max-width: 45rem;
  font-size: 1.1rem;
  color: var(--muted);
  margin-top: 1rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.card,
.content,
.prose {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.card,
.content {
  padding: 1.4rem;
}

.content {
  margin-bottom: 4rem;
}

.card h2,
.content h2 {
  margin-top: 0;
}

.card p,
.content p,
.prose p {
  color: var(--muted);
  line-height: 1.7;
}

.prose {
  padding: 3rem 2rem;
  margin: 4rem auto;
}

.not-found {
  text-align: center;
  max-width: 42rem;
}

@media (max-width: 800px) {
  .grid {
    grid-template-columns: 1fr;
  }

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