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

html{
    scroll-behavior: smooth;
}

body{
    display: flex;
    flex-direction: column;
    align-content: center;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #177b21;
    color: #333;
    line-height: 1.6;
}

.big-container{
    display: flex;
    flex-direction: column;
    background-color: #dedede;
    max-width: 1200px;
    margin: 15px auto;
    padding: 20px;
}

section{
    padding: 20px;
    margin: 20px 0;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

section ul{
    list-style-type: none;
    margin-left: 20px;
}

section ul li{
    margin: 10px 0;
    background-color: #333;
    color:#f5f5f5;
    padding: 10px;
}

section ul li:hover{
    background-color: #555;
    cursor: pointer;
}

nav ul{
    display: flex;
    justify-content: center;
    list-style-type: none;
    background-color: #333;
    padding: 10px 0;
    border-radius: 8px;
}

nav ul li{
    margin: 0 15px;
}

a:link, a:visited{
    color: #f5f5f5;
    text-decoration: none;
    font-weight: bold;
}

a:hover, a:active{
    text-decoration: underline;
}

footer{
    text-align: center;
    padding: 10px 0;
    background-color: rgb(90, 151, 90);
    color: #f5f5f5;
    border-radius: 8px;
    margin-top: 20px;
}

@media screen and (max-width: 768px) {
    body{
        padding: 10px;
    }

    nav ul{
        flex-direction: column;
        align-items: center;
    }

    nav ul li{
        margin: 10px 0;
    }
}
@media screen and (max-width: 480px){
    section{
        padding: 10px;
        margin: 10px 0;
    }

    section ul li{
        font-size: 14px;
        padding: 8px;
    }
}
@media screen and (max-width: 320px){
    nav ul li{
        font-size: 14px;
    }
}