Whay my nav is not centered?

/* ================================= 
  Base Element Styles
==================================== */

* {
    box-sizing: border-box;
}

body {
    font-family: 'Varela Round', sans-serif;
    line-height: 1.6;
    color: #3a3a3a;
}

p {
    font-size: .95em;
    margin-bottom: 1.8em;
}

h2,
h3,
a {
    color: #093a58;
}

h2,
h3 {
    margin-top: 0;
}

a {
    text-decoration: none;
}

img {
    max-width: 100%;


}

/* ================================= 
  Base Layout Styles
==================================== */

/* ---- Navigation ---- */

.name {
    font-size: 1.25em;
  margin: 0;
  float: left;
  padding-top: 10px;
  margin-left: 25px;
}

.main-nav {
margin-top: 5px;

}

.name a,
.main-nav a {
    text-align: center;
  display: block;
  padding: 10px 15px;

}



.main-nav a {
    font-size: .95em;
    color: #3acec2;
    text-transform: uppercase;

}

.main-nav a:hover {
    color: #093a58;
}


/* ---- Layout Containers ---- */
.main-header {
padding-top: .5em;
  padding-bottom: .5em;
}

.banner, 
.main-footer

{
text-align: center;

}

.col {
padding-right: 1em;
  padding-left: 1em;
}

.banner {
    color: #fff;
    background: #3acec2;
  padding: 3.2em 0;
  margin-bottom: 60px;
}

.main-footer {
    background: #d9e4ea;
    padding: 2em 0;
  display: block;
    margin-top: 30px;
}

/* ---- Page Elements ---- */

.logo {
    width: 190px;
  display: block;
  margin: auto;
  padding-top: 40px;

}

.headline {
margin-bottom: 0;
}



/* ================================= 
  Media Queries
==================================== */

@media (min-width: 769px) {

.container {
width: 90%;
  margin: 0 auto;
}

.name,
.col {
float: left;
}


.primary,
.secondary {
width: 50%;
}
.main-nav {
float: right;

}

.main-nav li {
display: inline-block;
  margin-left: 15px;


}

.tagline {
font-size: 1.4em;

}


.col {
  display: block;
  width: 100%;



    }


.feat-img {
        width: 300px;
        float: left;
        margin-top: 5px;
        margin-right: 25px;
        margin-bottom: 25px;
        padding: 10px;
        border: solid 1px #d9e4ea;
    }

.main-footer {

display: block;
  margin: auto;
  width: 100%;
  border: 1px;
}


    /* ---- Float clearfix ---- */

    .clearfix::after {
        content: " ";
        display: table;
        clear: both;
    }

}

@media (min-width: 1025px) {

.container {
width: 80%;
  max-width: 1150px;
}

.primary {
width: 40%;

}

.secondary,
.tertiary {
width: 30%;
}

}