Does the navigation go beyond the container or is it a problem with the gallery block?

Question

css

I made this section under Bootstrap 3, navigation outside the main container. Why?

<section id="portfolio">
            <div class="container">
                <div class="row">
                    <div class="col-md-6">
                        <h2 class="portfolio-title">portfolio</h2>
                    </div>

                    <div class="col-md-6 ">
                        <ul class="nav  nav-pills  navbar-my navbar-right ">
                            <li class="active"><a href="#">all</a></li>
                            <li><a href="#">panoramas</a></li>
                            <li><a href="#">portraits</a></li>
                            <li><a href="#">macro</a></li>
                            <li><a href="#">journal</a></li>
                        </ul>
                    </div>

                    </div>
                <div class="galery text-center">
                    <div class="row ">
                        <div class="col-md-3">
                            <div class="galery-item">
                                <img src="images/photo1.jpg" alt="photo1">
                            </div>
                        </div>
                        <div class="col-md-3">
                            <div class="galery-item">
                                <img src="images/photo1.jpg" alt="photo1">
                            </div>
                        </div>
                        <div class="col-md-3">
                            <div class="galery-item">
                                <img src="images/photo1.jpg" alt="photo1">
                            </div>
                        </div>
                        <div class="col-md-3">
                            <div class="galery-item">
                                <img src="images/photo1.jpg" alt="photo1">
                            </div>
                        </div>
                    </div>
                    <div class="row">
                        <div class="col-md-3">
                            <div class="galery-item">
                                <img src="images/photo1.jpg" alt="photo1">
                            </div>
                        </div>
                        <div class="col-md-3">
                            <div class="galery-item">
                                <img src="images/photo1.jpg" alt="photo1">
                            </div>
                        </div>
                        <div class="col-md-3">
                            <div class="galery-item">
                                <img src="images/photo1.jpg" alt="photo1">
                            </div>
                        </div>
                        <div class="col-md-3">
                            <div class="galery-item">
                                <img src="images/photo1.jpg" alt="photo1">
                            </div>
                        </div>
                    </div>
                </div>

            </div>
    </section>

#portfolio{
    padding-top:90px;
    padding-bottom:80px;
}
.portfolio-title{
    margin:0;
    line-height: 1.7;
    font-family: "SegoeUILight";
    color:#4b555d;
    text-transform: uppercase;
    font-size:30px;
}
.portfolio-title:after{
    position:relative;
    content: '';
    display:block;
    top:0;
    width:50px;
    height:2px;
    background-color: #4b555d;
}
.navbar-my li{
    padding-left:10px;
}
.navbar-my li:first-child{
    padding:0;
}
.navbar-my li a {
    padding:10px 20px;
    color:black;
    border-radius:0;
    border:2px solid #4bcaff;
    text-transform: uppercase;
}
.navbar-my .active a{
    padding:10px 20px;
    background:#4bcaff !important;
}


.navbar-my li a:hover,  .navbar-my li a:focus{
    background:none;
    color:#fff;
    background:#4bcaff;
}

.galery{
    padding-top:85px;

}
.galery-item{

    margin-bottom:20px;
}
.galery-item img{
    width:100%;
}

Answer 1

due topadding

Answer 2

.navbar-my {
.box-sizing: border-box;
}
Or
.navbar-my {
.box-sizing: padding-box;
}