#header-div {
    /* background-color: rgb(0, 37, 102); */

    /* background-color: #003ba2;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100%25' height='100%25' viewBox='0 0 1600 800'%3E%3Cg %3E%3Cpath fill='%23003696' d='M486 705.8c-109.3-21.8-223.4-32.2-335.3-19.4C99.5 692.1 49 703 0 719.8V800h843.8c-115.9-33.2-230.8-68.1-347.6-92.2C492.8 707.1 489.4 706.5 486 705.8z'/%3E%3Cpath fill='%23003289' d='M1600 0H0v719.8c49-16.8 99.5-27.8 150.7-33.5c111.9-12.7 226-2.4 335.3 19.4c3.4 0.7 6.8 1.4 10.2 2c116.8 24 231.7 59 347.6 92.2H1600V0z'/%3E%3Cpath fill='%23002e7d' d='M478.4 581c3.2 0.8 6.4 1.7 9.5 2.5c196.2 52.5 388.7 133.5 593.5 176.6c174.2 36.6 349.5 29.2 518.6-10.2V0H0v574.9c52.3-17.6 106.5-27.7 161.1-30.9C268.4 537.4 375.7 554.2 478.4 581z'/%3E%3Cpath fill='%23002972' d='M0 0v429.4c55.6-18.4 113.5-27.3 171.4-27.7c102.8-0.8 203.2 22.7 299.3 54.5c3 1 5.9 2 8.9 3c183.6 62 365.7 146.1 562.4 192.1c186.7 43.7 376.3 34.4 557.9-12.6V0H0z'/%3E%3Cpath fill='%23002566' d='M181.8 259.4c98.2 6 191.9 35.2 281.3 72.1c2.8 1.1 5.5 2.3 8.3 3.4c171 71.6 342.7 158.5 531.3 207.7c198.8 51.8 403.4 40.8 597.3-14.8V0H0v283.2C59 263.6 120.6 255.7 181.8 259.4z'/%3E%3Cpath fill='%23012159' d='M1600 0H0v136.3c62.3-20.9 127.7-27.5 192.2-19.2c93.6 12.1 180.5 47.7 263.3 89.6c2.6 1.3 5.1 2.6 7.7 3.9c158.4 81.1 319.7 170.9 500.3 223.2c210.5 61 430.8 49 636.6-16.6V0z'/%3E%3Cpath fill='%23011c4c' d='M454.9 86.3C600.7 177 751.6 269.3 924.1 325c208.6 67.4 431.3 60.8 637.9-5.3c12.8-4.1 25.4-8.4 38.1-12.9V0H288.1c56 21.3 108.7 50.6 159.7 82C450.2 83.4 452.5 84.9 454.9 86.3z'/%3E%3Cpath fill='%23011840' d='M1600 0H498c118.1 85.8 243.5 164.5 386.8 216.2c191.8 69.2 400 74.7 595 21.1c40.8-11.2 81.1-25.2 120.3-41.7V0z'/%3E%3Cpath fill='%23011434' d='M1397.5 154.8c47.2-10.6 93.6-25.3 138.6-43.8c21.7-8.9 43-18.8 63.9-29.5V0H643.4c62.9 41.7 129.7 78.2 202.1 107.4C1020.4 178.1 1214.2 196.1 1397.5 154.8z'/%3E%3Cpath fill='%23000e28' d='M1315.3 72.4c75.3-12.6 148.9-37.1 216.8-72.4h-723C966.8 71 1144.7 101 1315.3 72.4z'/%3E%3C/g%3E%3C/svg%3E");
    background-attachment: fixed;
    background-size: cover; */

    background-image: url('/imgs/GDC\ Website\ Background.png');
    background-size: cover;
    /* background-position: -350px 0px; */
    background-repeat: no-repeat;
    background: none;

    color: white;
    height: 800px;
    margin-top: -25px;
    width: 100%;
}

#title-video {
    position: fixed;
    width: 100%;
    height: 120%;
    z-index: -1;
    filter: blur(10px);
}

#title-div {
    text-align: center;
}

#left-header {
    width: 55%;
    float: left;
    margin-left: 5%;
    margin-top: 7.5%;
    background-color: rgba(0, 0, 0, 0.5);
    height: 450px;
}

#right-header {
    width: 35%;
    float: left;
    margin-top: 7.5%;
    background-color: rgba(0, 0, 0, 0.5);
    height: 450px;
}

#title-image {
    width: 650px;
    transition: all 0.5s;
    cursor: pointer;
    /* filter: drop-shadow(5px 5px 15px rgb(5, 9, 65)); filter: dropShadow(x y blur? spread? color?) */
}

#title-image:hover {
    transform: scale(1.05);
}

#title {
    font-size: 96px;
    font-weight: 700;
    text-align: center;
}

.register-button {
    display: inline-block;
    vertical-align: middle;
    -webkit-transform: perspective(1px) translateZ(0);
    transform: perspective(1px) translateZ(0);
    box-shadow: 0 0 1px rgba(0, 0, 0, 0);
    position: relative;
    border: 3px white solid;
    background: transparent;
    color: white;
    padding: 18px 48px;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    font-size: 36px; 
    -webkit-transition-property: color;
    transition-property: color;
    -webkit-transition-duration: 0.3s;
    transition-duration: 0.3s;
}
.register-button:before {
    content: "";
    position: absolute;
    z-index: -1;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgb(97, 126, 190);
    -webkit-transform: scaleX(0);
    transform: scaleX(0);
    -webkit-transform-origin: 50%;
    transform-origin: 50%;
    -webkit-transition-property: transform;
    transition-property: transform;
    -webkit-transition-duration: 0.3s;
    transition-duration: 0.3s;
    -webkit-transition-timing-function: cubic-bezier(.5,0,.9,.5);
    transition-timing-function: cubic-bezier(.5,0,.9,.5);
}
.register-button:hover, .register-button:focus, .register-button:active {
    color: white;
    border-color: rgb(97, 126, 190);
    text-decoration: none;
}
.register-button:hover:before, .register-button:focus:before, .register-button:active:before {
    -webkit-transform: scaleX(1);
    transform: scaleX(1);
}

#about-div {
    background-color: rgb(242, 242, 242);
    text-align: center;
    /* padding-left: 50px;
    padding-right: 50px; */
}

#about-title {
    font-size: 72px;
    font-weight: 700;
    text-align: center;
    color: rgb(43, 69, 126);
}

.about-card {
    background-color: white;
    width: 95%;
    height: 500px;
    /* margin-left: 3%; */
    margin: auto;
    margin-bottom: 50px;
    text-align: left;
    padding: 50px;
    color: black;
    box-shadow: 0 4px 50px 0 rgba(0, 0, 0, 0.1);
}

#make-card {
    text-align: right;
}

.left-div {
    width: 50%;
    float: left;
}

.right-div {
    padding-left: 40px;
    width: 50%;
    float: left;
    text-align: center;
}

#make-left {
    text-align: center;
    padding-left: 0px;
}

.about-image {
    width: 620px;
    height: 350px;
    border-radius: 15px;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.1);
    transition: all 0.2s;
}

.about-image:hover {
    transform: scale(1.025);
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}

.lessons-button {
    display: inline-block;
    vertical-align: middle;
    -webkit-transform: perspective(1px) translateZ(0);
    transform: perspective(1px) translateZ(0);
    box-shadow: 0 0 1px rgba(0, 0, 0, 0);
    position: relative;
    border: 3px rgb(97, 126, 190) solid;
    background: transparent;
    color: rgb(97, 126, 190);
    padding: 6px 48px;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    font-size: 24px; 
    -webkit-transition-property: color;
    transition-property: color;
    -webkit-transition-duration: 0.25s;
    transition-duration: 0.25s;
}
.lessons-button:before {
    content: "";
    position: absolute;
    z-index: -1;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgb(97, 126, 190);
    -webkit-transform: scaleX(0);
    transform: scaleX(0);
    -webkit-transform-origin: 50%;
    transform-origin: 50%;
    -webkit-transition-property: transform;
    transition-property: transform;
    -webkit-transition-duration: 0.25s;
    transition-duration: 0.25s;
    -webkit-transition-timing-function: cubic-bezier(.5,0,.9,.5);
    transition-timing-function: cubic-bezier(.5,0,.9,.5);
}
.lessons-button:hover, .lessons-button:focus, .lessons-button:active {
    color: white;
    border-color: rgb(97, 126, 190);
    text-decoration: none;
}
.lessons-button:hover:before, .lessons-button:focus:before, .lessons-button:active:before {
    -webkit-transform: scaleX(1);
    transform: scaleX(1);
}

@media screen and (min-width: 1636px) {
    #right-header {
        padding-left: 5vw;
        padding-right: 5vw;
    }
}

@media screen and (max-width: 1425px) {

    #learn-card {
        height: 600px;
    }

    #share-card {
        height: 600px;
    }

    .about-image {
        width: 100%;
        height: auto;
    }

}

@media screen and (max-width: 1200px) {

    #header-div {
        height: 90vw;
    }

    #left-header {
        width: 100%;
        height: 30vw;
        margin-left: 0;
        margin-top: 20%;
    }
    
    #right-header {
        width: 100%;
        margin-top: 0;
        height: 200px;
    }

    #title-image {
        width: 54vw;
    }

    .register-button {
        margin-top: 50px;
    }
}

@media screen and (max-width: 1070px) {
    
    .about-card {
        padding-left: 20px;
        padding-right: 20px;
    }

    #learn-card {
        height: 800px;
        text-align: center;
    }

    #make-card {
        height: 800px;
        text-align: center;
    }

    #share-card {
        height: 800px;
        text-align: center;
    }

    .left-div {
        padding-left: 0;
        padding-right: 0;
        width: 100%;
    }

    .right-div {
        padding-left: 0;
        padding-right: 0;
        width: 100%;
        margin-top: 50px;
    }

    #make-left {
        margin-top: 0px;
    }

    #make-right {
        margin-top: 50px;
    }

    .about-image {
        width: 60%;
    }
}

@media screen and (max-width: 983px) {

    #header-div {
        height: 110vw;
    }

    #right-header {
        height: 300px;
    }

}

@media screen and (max-width: 800px) {

    #header-div {
        height: 140vw;
    }

    #left-header {
        height: 40vw;
    }

    #title-image {
        width: 80%;
    }

}

@media screen and (max-width: 750px) {
    #learn-card {
        height: 900px;
    }

    #make-card {
        height: 900px;
    }

    #share-card {
        height: 1000px;
    }

    .about-image {
        width: 90%;
    }
}

@media screen and (max-width: 642px) {

    #header-div {
        height: 170vw;
    }

    #right-header {
        height: 400px;
    }

}

@media screen and (max-width: 500px) {

    #header-div {
        height: 240vw;
    }

    #left-header {
        margin-top: 40%;
        height: 50vw;
    }

    #right-header {
        height: 80vw;
    }

    .register-button {
        width: 80%;
    }
}

@media screen and (max-width: 450px) {

    #learn-card {
        height: 1000px;
    }

    #make-card {
        height: 1000px;
    }

    #share-card {
        height: 1100px;
    }

    .about-image {
        width: 100%;
    }

}

@media screen and (max-width: 390px) {

    #header-div {
        height: 280vw;
    }
    
    #about-title {
        font-size: 18vw;
    }

    #make-card {
        height: 1100px;
    }
}

@media screen and (max-width: 360px) {

    #learn-card {
        height: 1100px;
    }

    #make-card {
        height: 1200px;
    }

    #share-card {
        height: 1200px;
    }

}

@media screen and (max-width: 330px) {

    #share-card {
        height: 1300px;
    }

}