.nav{
    padding: 10px;
}
.nav-items{
    font-size: 35px;
}
.nav-logo{
    height: 40px;
}
.bg-black{
    background-color: black;
}
.cover{
    background: url(../img/cover.png) no-repeat center center; 
    background-size: cover;
    text-shadow: 2px 2px #333;
}
.cover-conference{
    background: url(../img/conference_banner_1.jpg) no-repeat center center; 
    background-size: cover;
    text-shadow: 2px 2px #333;
}
.cover-text{
    padding-top: 200px;
    padding-bottom: 200px;
}
article{
    border-bottom: 1px dashed #000;
    padding-bottom: 2rem;
    padding-top: 2rem;
}
iframe{
    margin: 0 auto;
}
.img-responsive{
    max-width: 100%;
}
.centered{
    margin: 0 auto;
    display: block;
    padding: 1rem;
}
.col-2{
    flex: 2 1 0;
    box-sizing: border-box;
    margin-bottom: .5rem;
    margin-left: .5rem;
    max-width: 100%;
}
.col-3{
    flex: 4 1 0;
    box-sizing: border-box;
    margin-bottom: .5rem;
    margin-left: .5rem;
    max-width: 100%;
}
#meetup-history{
    margin: 2rem 0;
}
dt{
    margin: 20px 0 10px 0;
}
dd{
    margin-bottom: 10px;
}
.list-large{
    font-size: 1.5rem;
    text-align: center;
}
.list-large li{
    padding: 1rem;
}
.table{
    margin: 2rem auto;
}
#sponsor-logos img{
    height: 60px;
    padding: 20px;
}
.speaker-photo{
    width: 200px;
    border-radius: 50%;
    margin: 1rem 0;
    border-color: #666;
    border-style: solid;
}
.speaker-info dt,
.speaker-info h3,
.speaker-info dd{
    margin: 1rem 1rem;
}
.video-wrap{
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
}
.video-wrap > iframe{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}