@media only screen and (min-width: 768px) {
  html {
    font-family: "Poppins", sans-serif;
  }

  a {
    text-decoration: none;
  }

  ul {
    list-style: none;
    margin: 0;
  }

  body {
    margin: 0;
  }

  #hamburger {
    display: none !important;
  }

  .mobile-nav {
    display: none !important;
  }

  .top-nav {
    width: 100%;
  }

  .top-nav ul {
    background-color: #333;
    display: flex;
    flex-direction: row;
    justify-content: end;
  }

  .web-nav li {
    margin: 10px 0 10px 10px;
    display: flex;
    align-items: center;
  }

  .top-nav ul li {
    background-color: #333;
    display: flex;
    flex-direction: row;
    margin: 2px 10px 2px 10px;
  }

  .top-nav a {
    color: #fff;
  }

  .top-nav .lastA {
    margin-right: 100px;
  }

  .web-nav {
    width: 100%;
    display: flex;
    flex-direction: row;
    justify-content: space-evenly;
    margin: 10px;
  }

  .web-nav .brand {
    margin: 10px 0 10px 10px;
  }

  .web-nav ul {
    display: flex;
    flex-direction: row;
  }

  .web-nav a {
    margin: 0 10px 0 10px;
    color: #333;
  }

  .web-nav a:hover {
    color: #ef513c;
  }

  .web-nav .lastCCA {
    color: #ef513c;
    border: #ef513c 3px solid;
    padding: 8px;
  }

  .Landing_Page {
    background-image: url("../images/mobile/home-background.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    padding: 1px 10px 10px 100px;
  }

  .hello {
    color: #ec5242;
    font-size: 2.5rem;
    margin: 40px 10px 0 6px;
  }

  .Landing_Page h1 {
    color: #ec5242;
    margin: 0;
    font-size: 3.5rem;
  }

  .message {
    color: rgb(98, 104, 105);
    background-color: #fff;
    padding: 5px;
    width: 35rem;
    font-size: 0.7rem;
  }

  .place {
    font-size: 21px;
    display: flex;
    flex-direction: column;
    font-weight: 700;
    text-align: left;
    letter-spacing: 0;
    color: #575757;
    margin-bottom: 100px;
  }

  .date {
    font-size: 1.5rem;
    font-weight: bolder;
    display: inline-block;
    text-align: left;
    margin-bottom: 4px;
    letter-spacing: 0;
    color: #575757;
  }

  .place-address {
    font-size: 16px;
    display: inline-block;
    text-align: left;
  }

  .program-info-wraper {
    background-image: url("../images/pattern_bg.png");
    background-repeat: repeat;
    background-color: #272a32;
    height: auto;
    padding-bottom: 80px;
  }

  .program-info-wraper section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #fff;
    height: auto;
    padding: 3rem;
  }

  .more-link {
    display: block;
    font-size: 1.125em;
    color: white;
    text-align: center;
    text-decoration: underline;
  }

  .main-ul {
    width: 90%;
  }

  .main-ul ul {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 8px;
    margin: 25px 0;
    justify-content: center;
    padding: 0;
  }

  .main-ul ul li {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background-color: #ffffff23;
    width: 150px;
    height: 180px;
    padding: 5px 0;
  }

  .main-ul h3 {
    color: #ec5242;
    font-family: "Cocogoose", sans-serif;
    font-weight: bold;
    font-size: 15px;
    align-items: center;
  }

  .main-ul p {
    color: #fff;
    font-size: 12px;
  }

  .main-ul img {
    width: 50px;
    height: 50px;
  }

  .partner-section h2 {
    color: #e1e1e1;
  }

  .program-info-wraper section h2 {
    font-size: 24px;
  }

  .guide-bar {
    width: 53px;
    border-top: 1px solid #ef513c;
    margin: 16px auto 25px;
  }

  .program-info-wraper section .program-list {
    padding-bottom: 16px;
    display: flex;
    flex-direction: row;
    justify-content: center;
  }

  .program-info-wraper section .program-card {
    display: flex;
    flex-direction: column;
    text-align: center;
    margin: 0 0 0 3px;
    padding: 8px;
    border: 0;
    float: left;
    width: calc(18% - 5px);
    background: rgb(255 255 255 / 10%);
  }

  .program-info-wraper section .program-list .program-card:hover {
    border: 1px solid hsl(7, 100%, 74%);
    cursor: pointer;
  }

  .program-info-wraper section .program-card .program-icon {
    float: left;
    margin: 0;
    padding-left: 10px;
  }

  .program-info-wraper section .program-card .program-sub-title {
    float: left;
    font-size: 18px;
    margin: 0 8px;
    color: #ef513c;
    font-weight: 700;
  }

  .program-info-wraper section .program-card .program-sub-description {
    font-size: 1em;
    display: flex;
    text-align: center;
    word-break: keep-all;
    overflow: auto;
    height: auto;
    color: #fff;
    line-height: 1.5em;
    padding: 8px 8px;
  }

  .program-info-wraper .join-button {
    display: none;
  }

  .speakers-wrap {
    height: auto;
    padding: 0 15rem;
  }

  .b-bottom {
    border-bottom: 1px solid #dfdfdf;
  }

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

  .last-footer-img img {
    height: 50px;
    width: 13rem;
  }

  footer.dark_footer div.content img {
    filter: invert(100%) sepia(100%) saturate(0%) hue-rotate(5deg) brightness(100%) contrast(100%);
  }

  .sponsors-wrap .content .sponsor-logos a img {
    width: 130px;
    filter: invert(100%) sepia(100%) saturate(0%) hue-rotate(5deg) brightness(100%) contrast(100%);
  }

  .speakers-wrap div.content {
    text-align: center;
    padding-top: 79px;
    color: #272a32;
    height: auto;
  }

  .main_speakes_wrap section .speaker_list {
    overflow: auto;
    height: auto;
  }

  .speakers-wrap div.content .speakers-list .speaker {
    margin: 0 0 0 10px;
    border: 0;
    width: calc(50% - 10px);
    float: left;
    height: 294px;
    display: flex;
  }

  .about-landing-wrap div.content .header-card img {
    margin: 20px;
  }

  .summits-wrapper .content .past-links img:hover {
    border: 1px solid rgb(251, 251, 251);
    cursor: pointer;
    filter: hue-rotate(5deg) brightness(105%) contrast(105%);
  }

  .speakers-wrap div.content .speakers-list .speaker img {
    float: left;
    width: 120px;
    height: 120px;
    margin-right: 30px;
  }

  .speakers-wrap div.content .speakers-list .speaker .desc {
    text-align: left;
  }

  .speakers-wrap div.content .speakers-list .speaker .desc .speaker-name {
    font-size: 22px;
    margin: 0;
  }

  .speakers-wrap div.content .speakers-list .speaker .desc .speaker-tag-name {
    font-size: 14px;
    margin-top: 5px;
  }

  .speakers-wrap div.content .speakers-list .speaker .desc .speaker-job {
    font-size: 13px;
    color: #ff4f38;
    text-align: left;
    margin: 0;
  }

  .speakers-wrap div.content .speakers-list .speaker .desc .speaker-desc {
    word-break: keep-all;
    text-align: left;
    font-size: 0.875em;
    padding-right: 1em;
    line-height: 24px;
    margin: 0;
  }

  .speakers-wrap div.content .more-btn {
    display: none;
  }

  .sponsors-wrap {
    text-align: center;
    background-color: #2e2e2e;
  }

  .sponsors-wrap .content {
    text-align: center;
    padding-top: 80px;
    padding-bottom: 45px;
    color: white;
    height: auto;
  }

  .sponsors-wrap .content .sponsor-logos {
    overflow: auto;
    height: auto;
    margin: 0;
    padding: 0;
    vertical-align: middle;
    text-align: center;
    width: 100%;
    position: relative;
  }

  .sponsors-wrap .content .sponsor-logos a {
    vertical-align: middle;
    display: inline-block;
    position: relative;
    margin-right: 50px;
  }

  .speaker-bar {
    border-top: 1px solid #817674;
    width: 36px;
    margin: 10px;
  }

  .partner-section {
    background-color: #333;
    height: auto;
    padding-bottom: 80px;
    border-bottom: #e1e1e1 ridge 1px;
  }

  .partner-section section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding-top: 20px;
    height: auto;
  }

  .partner-div {
    width: 100%;
    display: flex;
    justify-content: center;
  }

  .partner-div p {
    gap: 10px;
  }

  .mozilla {
    color: #dfdfdf;
    font-weight: 700;
    font-size: 2rem;
  }

  .google {
    color: #8d8282;
    font-weight: 400;
    font-size: 2rem;
    margin: 10px 50px 10px 50px;
  }

  .naver {
    color: #dfdfdf;
    font-weight: 700;
    font-size: 2rem;
  }

  .last-footer {
    background-color: #fff;
    padding: 10px 10px 10px 10px;
    display: flex;
    gap: 75px;
    justify-content: center;
    align-items: center;
  }
}

@media only screen and (max-width: 768px) {
  html {
    font-family: "Poppins", sans-serif;
  }

  a {
    text-decoration: none;
  }

  ul {
    list-style: none;
    margin: 0;
  }

  body {
    margin: 0;
  }

  .top-nav {
    display: none;
  }

  .web-nav {
    display: none;
  }

  .main-program i {
    color: #575757;
  }

  #hamburger i {
    font-size: 35px;
    color: rgb(145, 147, 148);
  }

  .menu-bar {
    width: 100%;
    background-color: #837270;
    color: azure;
    height: 2px;
  }

  .mobile-nav {
    display: none;
    width: 100%;
    height: 630px;
    background-color: rgb(29, 26, 26);
  }

  .mobile-nav ul {
    display: flex;
    flex-direction: column;
    color: #fff;
  }

  .fa-bars {
    padding: 10px;
  }

  .mobile-nav li {
    margin: 8px 14px 10px 0;
  }

  .mobile-nav a {
    color: #fff;
  }

  .close_btn {
    display: flex;
    justify-content: flex-end;
    margin: 10px;
    padding: 10px;
  }

  .Landing_Page {
    background-image: url("../images/mobile/home-background.jpg");
    background-repeat: no-repeat;
    background-size: auto;
    padding: 10px;
  }

  .hello {
    color: rgb(243 67 0);
    font-size: 2.5rem;
    margin: 40px 10px 0 6px;
  }

  .Landing_Page h1 {
    color: #ec5242;
    margin: 0;
    font-size: 2.5rem;
  }

  .message {
    color: rgb(98, 104, 105);
    background-color: #fff;
  }

  .place {
    font-size: 21px;
    font-weight: 700;
    display: inline-block;
    text-align: left;
    letter-spacing: 0;
    color: #575757;
    margin-bottom: 100px;
  }

  .date {
    font-size: 1.5rem;
    font-weight: bolder;
    display: inline-block;
    text-align: left;
    margin-bottom: 4px;
    letter-spacing: 0;
    color: #575757;
  }

  .place-address {
    font-size: 16px;
    display: inline-block;
    text-align: left;
  }

  .program-info-wraper {
    background-image: url("../images/pattern_bg.png");
    background-repeat: repeat;
    background-color: #272a32;
    height: auto;
    padding-bottom: 80px;
  }

  .normal {
    font-weight: 400;
  }

  .main-ul {
    width: 90%;
  }

  .main-ul ul {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    margin-top: 50px;
    padding: 0;
  }

  .main-ul h3 {
    color: #ec5242;
    font-family: "Cocogoose", sans-serif;
    font-weight: 50;
    font-size: 15px;
    align-items: baseline;
  }

  .main-ul ul li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #ffffff23;
    min-width: 330px;
    height: 70px;
    padding: 0 25px;
  }

  .main-ul p {
    color: #fff;
    font-weight: 400;
    font-size: 12px;
    width: 150px;
  }

  .program-info-wraper section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding-top: 20px;
    color: #fff;
    height: auto;
  }

  .partner-section h2 {
    color: #e1e1e1;
  }

  .program-info-wraper section h2 {
    font-size: 24px;
  }

  .guide-bar {
    width: 53px;
    border-top: 1px solid #ef513c;
    margin: 16px auto 0;
  }

  .speaker-bar {
    width: 25px;
    border-top: 1px solid #817674;
    margin: 10px;
  }

  .program-info-wraper section .program-card {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    margin: 8px;
    height: auto;
    overflow: auto;
    background: rgba(255, 255, 255, 0.1);
  }

  .partner-div p {
    gap: 10px;
  }

  .program-info-wraper section .program-card p {
    margin: 4px;
  }

  .program-info-wraper section .program-card .program-icon {
    float: left;
    margin: 0;
    padding-left: 10px;
  }

  .program-info-wraper section .program-card .program-sub-title {
    float: left;
    text-align: left;
    font-size: 18px;
    flex: 1 1 0;
    margin: 0 8px;
    color: #ef513c;
    font-weight: 700;
  }

  .program-info-wraper section .program-card .program-sub-description {
    width: calc(74% - 6.5em);
    float: left;
    font-size: 1em;
    text-align: left;
    word-break: keep-all;
    overflow: auto;
    height: auto;
    color: #fff;
    line-height: 1.5em;
    padding: 8px 17px;
  }

  .program-info-wraper .join-button {
    display: unset;
    background-color: #ef513c;
    color: #fff;
    font-size: 20px;
    border: 0;
    padding: 25px 10px;
    margin-top: 25px;
  }

  .join-button:hover {
    background-color: #e27264;
  }

  .speakers-wrap {
    height: auto;
    padding-bottom: 35px;
    width: 93%;
    margin: auto;
  }

  .speakers-wrap div.content {
    text-align: center;
    padding-top: 79px;
    color: #272a32;
    height: auto;
  }

  .speakers-wrap div.content .speakers-list .speaker {
    border: 0;
    width: calc(100% - 10px);
    display: flex;
    height: unset;
    margin: 12px 0;
  }

  .last-footer-img img {
    height: 50px;
    width: 13rem;
  }

  .speakers-wrap div.content .more-btn img {
    margin-left: 8px;
  }

  .sponsors-wrap .content .sponsor-logos a img {
    width: 130px;
    filter: invert(100%) sepia(100%) saturate(0%) hue-rotate(5deg) brightness(100%) contrast(100%);
  }

  .speakers-wrap div.content .speakers-list .speaker img {
    width: 120px;
    margin-right: 30px;
  }

  .speakers-wrap div.content .speakers-list .speaker .desc {
    text-align: left;
    display: flex;
    flex-direction: column;
  }

  .speakers-wrap div.content .speakers-list .speaker .desc .speaker-name {
    font-size: 22px;
    margin: 0;
  }

  .speakers-wrap div.content .speakers-list .speaker .desc .speaker-tag-name {
    font-size: 14px;
    margin-top: 5px;
  }

  .speakers-wrap div.content .speakers-list .speaker .desc .speaker-job {
    font-size: 13px;
    color: #ff4f38;
    text-align: left;
    margin: 0;
  }

  .speakers-wrap div.content .speakers-list .speaker .desc .speaker-desc {
    font-size: 0.875em;
    padding-right: 1em;
    margin: 0;
  }

  .speakers-wrap div.content .more-btn {
    width: 100%;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    display: flex;
  }

  .more-link {
    display: none;
  }

  .speakers-wrap div.content .more-link {
    color: #333;
  }

  .sponsors-wrap {
    text-align: center;
    background-color: #2e2e2e;
  }

  footer .content {
    text-align: center;
    padding: 16px 0;
    width: 90%;
    margin: auto;
  }

  .sponsors-wrap .content {
    text-align: center;
    padding-top: 80px;
    padding-bottom: 45px;
    color: white;
    height: auto;
  }

  .partner-section {
    background-color: #333;
    height: auto;
    padding-bottom: 80px;
    border-bottom: #e1e1e1 ridge 1px;
  }

  .partner-section section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding-top: 20px;
    height: auto;
  }

  .partner-div {
    width: 100%;
    display: flex;
    justify-content: center;
  }

  .mozilla {
    color: #dfdfdf;
    font-weight: 700;
  }

  .google {
    color: #8d8282;
    font-weight: 400;
    margin: 10px 10px 10px 10px;
  }

  .naver {
    color: #dfdfdf;
    font-weight: 700;
  }

  .last-footer {
    background-color: #fff;
    padding: 10px 10px 10px 10px;
    display: flex;
    gap: 75px;
    justify-content: center;
    align-items: center;
  }

  .hide {
    display: none !important;
  }
}