:root {
  --bg: #f3f6f9;
  --card: #ffffff;
  --accent: #2563eb;
  --text: #1f2937;
  --muted: #6b7280;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
               Roboto, Ubuntu, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* Header */
header {
  background: linear-gradient(135deg, #1e3a8a, #2563eb);
  color: #fff;
  padding: 50px 20px;
  text-align: center;
}

header h1 {
  margin: 0 0 10px;
  font-size: 32px;
}

header .subtitle {
  font-size: 18px;
  opacity: 0.9;
}

/* Sections */
section {
  background: var(--card);
  margin: 30px auto;
  padding: 30px;
  max-width: 900px;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

h2 {
  margin-top: 0;
  margin-bottom: 15px;
  font-size: 22px;
  color: #111827;
}

ul {
  padding-left: 20px;
  margin: 0;
}

li {
  margin-bottom: 8px;
}

/* Contacts */
section p {
  margin: 8px 0;
  font-size: 16px;
}

/* Footer */
footer {
  text-align: center;
  padding: 30px 20px;
  font-size: 14px;
  color: var(--muted);
}

/* Responsive */
@media (max-width: 600px) {
  header h1 {
    font-size: 26px;
  }

  section {
    margin: 20px 15px;
    padding: 20px;
  }
}