* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background: #f4f4f4;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    text-align: center;
    padding: 40px 20px;
    flex: 1;
}

.banner {
    max-width: 400px;
    width: 100%;
    margin-bottom: 20px;
}

.content h1 {
    color: #d32f2f;
    font-size: 28px;
    margin-bottom: 10px;
}

.content p {
    color: #555;
    font-size: 18px;
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background: #d32f2f;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    transition: 0.3s;
}

.btn:hover {
    background: #b71c1c;
}

footer {
    text-align: center;
    padding: 15px;
    background: #222;
    color: #fff;
    font-size: 14px;
}