body {
    background-color: #121212;
    color: #f5f5f5;
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
}
.container {
    max-width: 900px;
    margin: auto;
    padding: 20px;
}
h1, h2 {
    color: #e53935;
    text-align: center;
}
label {
    display: block;
    margin-top: 15px;
}
input[type="number"], select {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    border-radius: 5px;
    border: none;
    font-size: 16px;
}
button {
    margin-top: 20px;
    padding: 12px 25px;
    background-color: #e53935;
    color: #fff;
    border: none;
    border-radius: 5px;
    font-size: 18px;
    cursor: pointer;
}
button:hover {
    background-color: #c62828;
}
.results {
    margin-top: 30px;
    background-color: #1f1f1f;
    padding: 20px;
    border-radius: 10px;
}
.section {
    margin-top: 20px;
}
.ad-space {
    text-align: center;
    background: #1f1f1f;
    padding: 20px;
    border-radius: 10px;
    margin-top: 20px;
}
@media(max-width:768px){
    .container { padding: 10px; }
    h1 { font-size: 24px; }
}