body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f5f7fa;
}

.header {
  background: #2A2F48;
  padding: 15px;
  text-align: center;
}

.logo {
  max-height: 80px;
}

.container {
  margin: 40px auto;
  max-width: 600px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  padding: 30px;
}

h2 {
  color: #2A2F48;
  margin-top: 0;
}

input[type="text"],
input[type="password"],
input[type="file"] {
  width: 100%;
  padding: 12px;
  margin: 8px 0 20px;
  border: 1px solid #ddd;
  border-radius: 4px;
}

input[type="submit"] {
  background: #78B2C9;
  color: #fff;
  font-size: 16px;
  border: none;
  border-radius: 4px;
  padding: 12px 20px;
  cursor: pointer;
}

input[type="submit"]:hover {
  background: #5a90a0;
}

.error {
  color: #B00020;
}