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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f4f6f8;
  color: #2c3e50;
  padding: 20px;
  line-height: 1.6;
}

header {
  text-align: center;
  margin-bottom: 40px;
}

h1 {
  font-size: 2.8em;
  margin-bottom: 0.3em;
  color: #34495e;
}
/* 
main {
  max-width: 700px;
  margin: 0 auto;
  background: #ffffff;
  padding: 25px 30px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
} */

dl dt {
  font-weight: 700;
  font-size: 1.2em;
  margin-top: 1em;
  color: #2980b9;
}

dl dd {
  margin-left: 1.2em;
  margin-bottom: 0.8em;
  color: #555;
}

footer {
  text-align: center;
  margin-top: 50px;
  font-size: 0.9em;
  color: #7f8c8d;
}