body {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  background-color: #f5f6fa;
  margin: 0;
  padding: 0;
  color: #2c3e50;
  line-height: 1.7;
}
.container {
  max-width: 900px;
  margin: 40px auto;
  padding: 30px;
  background-color: #fff;
  box-shadow: 0 6px 18px rgba(0,0,0,0.1);
  border-radius: 12px;
}
h1, h2 { color: #3498db; margin-bottom: 15px; }
p { margin-bottom: 15px; }
ul { margin-bottom: 15px; padding-left: 20px; }
a { color: #3498db; text-decoration: none; }
a:hover { text-decoration: underline; }
footer { background-color:#2c3e50; color:#fff; padding:30px 20px; text-align:center; }
footer a { color:#3498db; text-decoration:none; margin:0 10px; }
footer a:hover { text-decoration:underline; }
button { padding: 12px; background-color: #3498db; color: #fff; border: none; border-radius: 6px; font-size: 16px; cursor: pointer; }
button:hover { background-color: #2980b9; }
input, textarea { margin-bottom: 15px; padding: 10px; border: 1px solid #ccc; border-radius: 6px; font-size: 16px; }
textarea { resize: vertical; min-height: 120px; }
form { display: flex; flex-direction: column; }
label { margin-bottom: 5px; font-weight: bold; }
@media (max-width: 600px) { .container { padding: 20px; margin: 20px; } }