style.css

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #1a1a1a;
    color: #ffffff;
}

header {
    background-color: #000000;
    padding: 20px;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

ul {
    list-style: none;
    display: flex;
}

ul li {
    margin: 0 15px;
}

a {
    text-decoration: none;
    color: #ffffff;
    font-weight: bold;
}

.button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 15px;
    border-radius: 5px;
}

.hero {
    text-align: center;
    padding: 50px 20px;
}

.hero h1 {
    font-size: 2.5rem;
}

.hero p {
    font-size: 1.2rem;
    margin: 20px 0;
}

.preview img {
    max-width: 100%;
    height: auto;
}

.features {
    display: flex;
    justify-content: space-around;
    padding: 40px 20px;
}

.feature {
    text-align: center;
    max-width: 200px;
}

.feature h3 {
    margin: 15px 0;
}

footer {
    text-align: center;
    padding: 20px;
    background-color: #000000;
}