:root {
  --bg: #f7f8fa;
  --fg: #1c2430;
  --muted: #5b6675;
  --accent: #0f6f6b;
  --accent-dark: #0b5653;
  --card: #ffffff;
  --line: #dfe4ea;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 16px/1.6 "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 14px 28px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--fg);
  text-decoration: none;
}

nav a {
  margin-left: 18px;
  color: var(--muted);
  text-decoration: none;
  padding-bottom: 2px;
}

nav a.active, nav a:hover { color: var(--accent); border-bottom: 2px solid var(--accent); }

main { max-width: 980px; margin: 0 auto; padding: 32px 24px 48px; }

h1 { font-size: 30px; margin: 8px 0 16px; }
h2 { font-size: 20px; margin: 24px 0 8px; }

.hero { padding: 24px 0 8px; }
.hero h1 { font-size: 36px; }
.hero p { max-width: 640px; font-size: 18px; color: var(--muted); }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff !important;
  padding: 10px 22px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
}
.btn:hover { background: var(--accent-dark); }

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin: 24px 0;
}

.features article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px 20px;
}

.features article h2 { margin-top: 0; }

ul.plain { padding-left: 20px; }
ul.plain li { margin: 6px 0; }

.strip {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  padding: 18px 22px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.strip div { display: flex; flex-direction: column; }
.strip strong { font-size: 24px; color: var(--accent); }
.strip span { color: var(--muted); }

.muted { color: var(--muted); }

address.plain { font-style: normal; line-height: 1.8; }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 16px 28px;
  color: var(--muted);
  background: var(--card);
}

@media (max-width: 640px) {
  .site-header { padding: 12px 16px; }
  nav a { margin-left: 12px; }
  .hero h1 { font-size: 28px; }
}