/*div{
  border: solid;
  padding: 20px;
}*/

.demo-card-square.mdl-card {
    width: 300px;
    height: 340px;
    margin: 20px auto;
}
#img1 {
    padding-top: 10px;
}
.demo-card-square > .mdl-card__title {
    color: #fff;
    background-image: linear-gradient(to top, #cfd9df 0%, #e2ebf0 100%);
    center / cover;
}
.options {
    margin: 30px;
}
/*.demo-card-square {} .hero-image {
    background: url('../images/hero-image-01.png') center 35% no-repeat;
    height: 100vh;
}*/

.hero-image {
    width: 100%;
    height: auto%;
    position: absolute;
}
.mdl-grid {
    padding: 0;
}
.mdl-button {
    margin-left: 0px;
}
.main-button {
    margin: auto;
    margin-top: 20px;
    width: 200px;
    height: 60px;
    font-size: 20px;
    */
}
.title-text {
    margin-top: 25%;
    color: white;
    padding-right: 25px;
    position: relative;
}
h1,
h2 {
    margin: 0;
    font-size: 50px;
}
p {
    padding-top: 15px;
}
.quote {
    background: url('../images/quote-image-03-01.png') no-repeat;
    height: 50vh;
}
#quote-text {
    color: white;
    text-align: center;
    margin-top: 10%;
}
#intro-section.mdl-grid {
    height: 1080px;
}
@media screen and (max-width: 1980px) and (min-width: 1840px) {
    #intro-section.mdl-grid {
        height: 1080px;
    }
}
@media screen and (max-width: 1839px) and (min-width: 1640px) {
    #intro-section.mdl-grid {
        height: 1026px;
    }
}
@media screen and (max-width: 1639px) and (min-width: 1540px) {
    #intro-section.mdl-grid {
        height: 1000px;
    }
}
@media screen and (max-width: 1539px) and (min-width: 1440px) {
    #intro-section.mdl-grid {
        height: 980px;
    }
}
@media screen and (max-width: 1439px) and (min-width: 1240px) {
    #intro-section.mdl-grid {
        height: 780px;
    }
}
@media screen and (max-width: 1239px) and (min-width: 1040px) {
    #intro-section.mdl-grid {
        height: 700px;
    }
}
@media screen and (max-width: 1039px) and (min-width: 960px) {
    #intro-section.mdl-grid {
        height: 680px;
    }
}
#full-options-container {
    position: relative;
    margin: auto;
}
.bio-pics {
    padding: 0;
    width: 300px;
    height: auto;
    margin: auto;
    margin-top: 20px;
    position: relative;
}
.container {
    position: relative;
    width: 300px;
    height: auto;
}
.image {
    display: block;
    width: 300px;
    height: auto;
}
/*Jessica Bio */

#overlayJessica {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    height: 300px;
    width: 300px;
    opacity: 0;
    transition: .5s ease;
    background: url('../images/jessica-seagull.png') no-repeat;
}
.container:hover #overlayJessica {
    opacity: 1;
}
/*Gary Bio*/

#overlayGary {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    height: 300px;
    width: 300px;
    opacity: 0;
    transition: .5s ease;
    background: url('../images/gary-seagull.png') no-repeat;
}
.container:hover #overlayGary {
    opacity: 1;
    background-size: cover;
}
/*Nick Bio*/

#overlayNick {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    height: 300px;
    width: 300px;
    opacity: 0;
    transition: .5s ease;
    background: url('../images/nick-seagull.png') no-repeat;
}
.container:hover #overlayNick {
    opacity: 1;
}
/*Spencer Bio*/

#overlaySpencer {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    height: 300px;
    width: 300px;
    opacity: 0;
    transition: .5s ease;
    background: url('../images/spencer-seagull.png') no-repeat;
}
.container:hover #overlaySpencer {
    opacity: 1;
    background-position: top;
}
.mdl-card__supporting-text {
    font-size: 20px;
    line-height: 24px;
}
#about-text {
    font-size: 18px;
    line-height: 30px;
    font-weight: lighter;
}
.bio-pic-container {
    margin: auto;
}
div.container {
    margin: 0px;
}
#team-pics .container {
    padding: 0px 30px;
}
#team-pics .container2 {
    margin-left: 30px;
}
<style> .demo-card-image.mdl-card {
    width: 300px;
    height: 300px;
}
.demo-card-image > .mdl-card__actions {
    height: 52px;
    padding: 16px;
    background: rgba(0, 0, 0, 0.2);
}
.demo-card-image__filename {
    color: #fff;
    font-size: 14px;
    font-weight: 500;
}
.mdl-mini-footer {
    background: url('../images/footer-image-01.png');
    height: 100px;
    text-align: center;
}
.footer-text {
    color: white;
    font-size: 20px;
    width: 100%;
    text-align: center;
}