h1{
    text-align: center;
    color: red;
    border-bottom: black 2px solid;
    margin: 0;
    padding: 0;
    background-color: rgba( 128, 128, 128, 0.5);
}
nav{
    width: 100%;
    border-bottom: 2px solid red;
    border-top: 2px solid red;
    background-color: black;
}

nav ul{
    margin: 0;
    padding: 0;
}

nav li{
    background-color: black;
    list-style-type: none;
    float: left;
}

nav a{
    display: inline-block;
    text-decoration: none;
    padding: 20px 30px;
    color: #ffffff;
    text-transform: uppercase;
    font-size: 15px;
}

.table{
    display: table;
    margin: 0 auto;
}

.pecs1{
    font-size: 25px;
    display: flex;
    border-bottom: 2px solid rgb(0, 0, 0);
    background-color: rgba(255, 165, 0, 0.30);
    padding: 0;
    border-right: orange 4px solid;
    gap: 5px;
}

.pecs2{
    font-size: 25px;
    display: flex;
    border-bottom: 2px solid rgb(0, 0, 0);
    background-color: rgba(0, 0, 0, 0.3);
    padding: 0;
    border-right: rgb(0, 0, 0) 4px solid;
    gap: 5px;
}

.pecs3{
    font-size: 25px;
    display: flex;
    border-bottom: 2px solid rgb(0, 0, 0);
    background-color: rgba(39, 211, 0, 0.3);
    padding: 0;
    border-right: rgb(39, 211, 0) 4px solid;
    gap: 5px;
}

.pecs4{
    text-align: center;
    color: red;
    border-bottom: black 2px solid;
    margin: 0;
    padding: 0;
    background-color: rgba( 128, 128, 128, 0.5);
}

@media screen and (max-width: 780px){
    header{
        height: 50px;
    }
    h1{
        font-size: 28px;
        margin: 20px 0px 0px 0px;
    }
    nav li a{
        padding: 10px;
        font-size: 10px;
    }
    nav li{
        padding: 5px 10px 10px 10px;
    }
    .pecs1, .pecs2, .pecs3{
        max-width: 780px;
    }
}