body {
    background-color: #121212; /* Deep charcoal black */
    color: #ffffff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
}
.header {
    background-color: #1c1c1c; /* Dark graphite */
    padding: 20px;
    text-align: center;
    border-bottom: 3px solid #e23636; /* Chilli red accent */
}
h1 {
    color: #e23636;
    margin: 0;
}
.container {
    padding: 40px;
    text-align: center;
}
.btn {
    background-color: #e23636;
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: 0.3s;
    display: inline-block;
    border: none;
    cursor: pointer;
}
.btn:hover {
    background-color: #b32b2b;
}