* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  background: #173a59; 
  color: white;
  line-height: 1.6;
  max-width: 760px;
  margin: 0 auto;       
}

/* картинка */
header img {
  width: 100%;
  height: auto;
  display: block;
}

header h1 {
  text-align: center;
  margin: 1rem 0;
}

section {
  background: #1f4e79;
  padding: 1rem;
  margin: 1rem 0;
  border-radius: 6px;
}

h2 {
  margin-bottom: 0.5rem;
  color: #f5a623;   
}

ul, ol {
  margin-left: 1.2rem;
}

a {
  color: #4A90E2;   
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  padding: 1rem;
  background: #0f2b44;
}