body {
    background-color: #000;
    color: #fff;
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
}

header, nav, footer {
    background-color: #111;
    padding: 20px;
    text-align: center;
}

nav a {
    color: #fff;
    text-decoration: none;
    margin: 0 15px;
    font-weight: bold;
}

nav a:hover {
    color: #f00;
}

.logo {
    max-height: 80px;
    margin-bottom: 10px;
}

.slider {
    background: url('/images/banner.png') no-repeat center center;
    background-size: cover;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2em;
}

.section {
    padding: 40px 20px;
    text-align: center;
}

.section-dark {
    background-color: #111;
}

.card {
    background-color: #222;
    margin: 15px;
    padding: 20px;
    border-radius: 8px;
    display: inline-block;
    width: 280px;
    vertical-align: top;
}

.card img {
    width: 100%;
    border-radius: 5px;
}

.chat, .newsletter, .custom-form {
    background-color: #222;
    padding: 20px;
    margin: 15px auto;
    max-width: 600px;
    border-radius: 8px;
}

input[type="text"], input[type="email"] {
    width: 80%;
    padding: 10px;
    margin: 10px 0;
    border: none;
    border-radius: 4px;
}

button {
    padding: 10px 20px;
    border: none;
    background-color: #f00;
    color: #fff;
    font-weight: bold;
    border-radius: 4px;
    cursor: pointer;
}

footer {
    font-size: 0.9em;
    color: #888;
}