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

html {
    scroll-behavior: smooth;
}

body {
    background-color: #111;
    background-image: url("images/background.jpg");
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: black;
    font-family: Arial, sans-serif;
}

header {
    background-color: rgba(255, 255, 255, 0.8);
    padding: 20px;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1000px;
    margin: auto;
}

nav a {
    color: black;
    text-decoration: none;
    margin-left: 15px;
}

nav a:hover {
    color: green;
}

main {
    max-width: 1000px;
    margin: auto;
    padding: 20px;
}

section {
    min-height: 70vh;
    padding: 80px 20px;
    border-bottom: 1px solid #555;
}

h1 {
    font-size: 60px;
    margin-bottom: 20px;
}

h2 {
    font-size: 40px;
    margin-bottom: 20px;
}

h3 {
    font-size: 25px;
    margin-bottom: 10px;
}

p {
    max-width: 600px;
    margin-bottom: 20px;
}

#home {
    padding-top: 150px;
}

#home a {
    background-color: #00ff99;
    color: black;
    padding: 10px 15px;
    text-decoration: none;
    border-radius: 5px;
}

article {
    background-color: rgba(255, 255, 255, 0.8);
    padding: 20px;
    margin: 20px 0;
    border-radius: 5px;
}

article a {
    color: green;
}

ul {
    padding-left: 20px;
}

li {
    margin-bottom: 10px;
}

#contact a {
    color: green;
    margin-right: 15px;
}

footer {
    padding: 30px;
    text-align: center;
    background-color: rgba(255, 255, 255, 0.8);
}

button {
    margin-top: 20px;
    padding: 10px 20px;
    cursor: pointer;
}

@media (max-width: 600px) {
    nav {
        flex-direction: column;
    }

    nav a {
        margin: 5px;
    }

    h1 {
        font-size: 45px;
    }

    h2 {
        font-size: 30px;
    }
}