* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
body {
  background-color: #f4f4f4;
  padding: 20px;
}
.container {
  max-width: 800px;
  margin: auto;
  background: #fff;
  padding: 30px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  border-radius: 8px;
}
h2, h3 {
  margin-bottom: 20px;
  color: #333;
}
form {
  margin-bottom: 30px;
}
input[type="text"], input[type="password"], input[type="file"] {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  margin-bottom: 15px;
  border: 1px solid #ccc;
  border-radius: 5px;
}
button {
  background-color: #0066cc;
  color: white;
  padding: 10px 15px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}
button:hover {
  background-color: #004c99;
}
ul {
  list-style: none;
}
li {
  padding: 10px 0;
  border-bottom: 1px solid #ddd;
}
a {
  color: #0066cc;
  margin-left: 10px;
}
a:hover {
  text-decoration: underline;
}
@media (max-width: 600px) {
  .container {
    padding: 15px;
  }
  h2, h3 {
    font-size: 20px;
  }
}