body {
    font-family: Arial, Helvetica, sans-serif;
    background: #23272f;
    color: #000000;
}

.container {
    max-width: 600px;
    margin: 100px auto;
    padding: 60px;
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.32);
    text-align: center;
}

.btn {
    display: inline-block;
    padding: 10px 18px;
    background: #333;
    color: #f5f6fa;
    border-radius: 6px;
    text-decoration: none;
    border: 1px solid #444;
    transition: background 0.2s;
}
.btn:hover {
    background: #444;
}

img {
    max-width: 300px;
    margin: 12px 0;
    filter: brightness(0.95) contrast(1.1);
}