.example {
  padding: 20px;
  background: #f0f0f0;
}

h1 {
  color: #333;
}

body {
    background: #f8f8f8;
    color: #222;
    font-family: Arial, sans-serif;
    text-align: center;
    margin: 0;
}

header {
    background: #000; /* changed from blue to black */
    padding: 10px;
}

.logo {
    width: 175px;
}

.container {
    margin: 100px auto;
    max-width: 600px;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.error-box h1 {
    color: #000; /* changed from blue to black */
    font-size: 28px;
}

.btn {
    display: inline-block;
    margin-top: 15px;
    padding: 10px 20px;
    background: #000; /* changed from blue to black */
    color: white;
    text-decoration: none;
    border-radius: 5px;
}